Automatic feeding system for radioactive powder materials

Abstract

Automatic feeding system for radioactive powder materials, comprising a workshop, a storage tank, a transfer tank, a material merging assembly and a material feeding assembly; an inner sealing cover A and an outer protective cover are respectively movably installed on the inner side and the outer side of the discharge port A of the storage tank; an inner sealing cover B is movably installed on the inner side of the discharge port B of the transfer tank; the material merging assembly includes a transfer tank rotating device, a storage tank translation trolley, a storage tank outer cover dismounting and assembling device, a storage tank inner cover opening and closing device, a transfer tank upper cover dismounting and assembling device and a lower pipeline docking device; the material feeding assembly includes a transfer tank translation trolley, an upper pipeline docking device and a transfer tank inner cover opening and closing device. On the basis of the traditional feeding process, the present invention optimizes the feeding process, thereby greatly shortening the moving path of radioactive powder materials during the feeding operation and greatly improving the efficiency of the feeding operation.

Description

Technical Field

[0001] The present invention relates to the technical field of uranium conversion related equipment, and particularly to an automatic feeding system for radioactive powder materials. Background Art

[0002] With the rapid development of the nuclear power trend, the installed capacity has increased rapidly, putting forward higher requirements for the supply of nuclear fuel. Uranium ore is the main raw material for preparing nuclear fuel. In the whole preparation process of nuclear fuel, two steps of uranium purification and uranium conversion will be successively experienced. Uranium purification refers to the production process from uranium ore concentrate to refined UO2. Uranium conversion refers to the production process from refined UO2 to UF6.

[0003] The UO2 powder material produced in the uranium purification step is stored in a special sealed container for later use. The sealed container is provided with a discharge port at the lower end that can be closed or opened, and the capacity and volume are both designed to be small for easy transportation or storage. When it comes to the uranium conversion step, it is necessary to discharge the UO2 powder material in multiple sealed containers into the transfer bin, and this operation is called the UO2 feeding operation.

[0004] Currently in the industry, the UO2 feeding operation is carried out in a three-story factory building. On the first floor of the factory building, there are multiple sealed containers filled with UO2 powder material. On the second floor of the factory building, there are successively connected hydrofluorination equipment (for processing UO2) and a transfer bin. On the third floor of the factory building, there is a discharge port connected to the transfer bin, and the discharge port is used to receive the UO2 powder material poured out from the sealed container. When performing the UO2 feeding operation, it is necessary for an operator to manually control the overhead crane to lift multiple sealed containers from the first floor of the factory building to the third floor of the factory building, and then connect each sealed container to the discharge port one by one for pouring.

[0005] The above UO2 feeding operation has the following deficiencies:

[0006] 1. In one working cycle of the feeding operation, a total of 3 - 4 cans of the sealed container's materials need to be fed into the transfer bin. In this process, it is necessary to transport the sealed container from the first floor of the factory building to the third floor of the factory building. After the feeding is completed, the empty sealed container is transported back to the first floor of the factory building. For each sealed container, operations such as opening the lid (i.e., opening the discharge port at the lower end of the sealed container), docking (i.e., docking the discharge port at the lower end of the sealed container with the discharge port on the third floor of the factory building), and closing the lid (i.e., closing the discharge port at the lower end of the sealed container) all require the operator to go up to the third floor of the factory building to operate personally. The steps are cumbersome and the efficiency is low.

[0007] 2. During the feeding operation, the UO2 powder material is likely to leak out between the discharge port of the sealed container and the discharge port on the third floor of the factory building, generating dust. Since the UO2 powder is radioactive, it will damage the health of the operators on the third floor of the factory building.

[0008] 3. On the one hand, to prevent the diffusion of UO2 powder material to the outside of the plant and pollute the environment, the plant has a certain degree of airtightness to achieve isolation from the outside. On the other hand, there is a hydrofluorination device with a very high operating temperature on the second floor of the plant, which increases the heat load inside the plant. These two aspects jointly result in a relatively high environmental temperature inside the plant. Especially in the hot summer, the indoor temperature on the third floor of the plant is as high as 50 - 60 °C, making the working environment of the operators on the third floor of the plant very harsh. Summary of the Invention

[0009] The object of the present invention is to overcome the deficiencies of the prior art and provide an automatic feeding system for radioactive powder materials, which solves the problems of cumbersome operation steps, low efficiency, time-consuming and laborious, radiation risk, and harsh working environment in the current UO2 feeding operation.

[0010] The technical solution of the present invention is: an automatic feeding system for radioactive powder materials, comprising a plant, a storage tank, a transfer tank, a material merging assembly, and a material feeding assembly;

[0011] Inside the plant, there are a first-floor space, a second-floor space, and a third-floor space arranged from bottom to top in sequence; inside the plant, there is a transfer elevator running through the first-floor space, the second-floor space, and the third-floor space from bottom to top. The transfer elevator has a lower open end and an upper open end in the first-floor space and the third-floor space respectively; an overhead sliding table and a jib crane are installed in the first-floor space, and a horizontal track A is provided on the overhead sliding table; a transfer bin is placed in the second-floor space, and a feed inlet is provided at the upper end of the transfer bin; a horizontal track B is provided on the ground of the third-floor space, one end of the horizontal track B is close to the upper open end of the transfer elevator, and the other end is far from the upper open end of the transfer elevator;

[0012] The storage tank is internally provided with an inner cavity A, and a discharge port A is provided at the bottom of the storage tank. An inner sealing cover A and an outer protective cover are respectively arranged inside and outside the discharge port A of the storage tank;

[0013] The transfer tank is internally provided with an inner cavity B whose volume is several times that of the inner cavity A. A feed inlet is provided at the top of the transfer tank, and an upper sealing cover is detachably installed on the feed inlet. A discharge port B is provided at the bottom of the transfer tank, and an inner sealing cover B is arranged inside the discharge port B of the transfer tank;

[0014] The material merging assembly includes a transfer tank rotating device, a storage tank translation trolley, a storage tank outer cover disassembly and assembly device, a storage tank inner cover opening and closing device, a transfer tank upper cover disassembly and assembly device, and a lower pipeline docking device; the transfer tank rotating device is arranged directly below the overhead slide, and an installation station A for positioning the transfer tank is provided thereon; the storage tank translation trolley is movably installed on the horizontal track A, and a plurality of installation stations B for positioning the storage tank are provided thereon; the storage tank outer cover disassembly and assembly device is arranged directly below the overhead slide, and is used for disassembling and assembling the outer protective cover of the storage tank located at the installation station B; the storage tank inner cover opening and closing device is installed on the overhead slide, and is used for controlling the movement of the inner sealing cover A of the storage tank located at the installation station B, so as to be attached to or separated from the discharge port A; the transfer tank upper cover disassembly and assembly device is installed on the overhead slide, and is used for disassembling and assembling the upper sealing cover of the transfer tank located at the installation station A; the lower pipeline docking device is arranged between the transfer tank rotating device and the storage tank translation trolley, and is used for connecting the storage tank located at the installation station B and the transfer tank located at the installation station A;

[0015] The material feeding assembly includes a transfer tank translation trolley, an upper pipeline docking device, and a transfer tank inner cover opening and closing device; the transfer tank translation trolley is movably installed on the horizontal track B, and an installation station C for positioning the transfer tank is provided thereon; the upper pipeline docking device is arranged between the transfer tank translation trolley and the transfer silo, and is used for connecting the transfer tank placed at the installation station C and the transfer silo; the transfer tank inner cover opening and closing device is arranged on the transfer tank translation trolley, and is used for controlling the movement of the inner sealing cover B of the transfer tank placed at the installation station C, so as to be attached to or separated from the discharge port B.

[0016] A further technical solution of the present invention is as follows: The storage tank includes a tank body A, a lead screw A, a nut A, an operation disc A, an inner sleeve A, an outer sleeve A, an extension rod A, an inner sealing cover A and an outer protective cover; Four legs are welded evenly in a ring at the lower end of the tank body A. An inner cavity A is provided inside the tank body A. A discharge port A is provided at the bottom of the tank body A. An annular step is provided on the outer wall of the lower end of the tank body A near the discharge port A. An annular upper pressing plate is fixedly installed on the annular step of the tank body A, and the upper pressing plate extends radially outward of the storage tank; The lead screw A is movably installed in the inner cavity A of the tank body A and is arranged at the center of the inner cavity A of the tank body A along the axial direction of the tank body A. The lead screw A is successively provided with an operation section, a smooth rod section and a threaded rod section from top to bottom. The operation section of the lead screw A extends out of the upper end of the tank body A. The lead screw A is rotatably connected to the tank body A through a tapered roller bearing on the smooth rod section; The nut A is threadedly connected to the threaded rod section of the lead screw A, and a guide groove A is provided on the outer side wall surface of the nut A; The operation disc A is fixedly installed on the operation section of the lead screw A, and a plurality of jacks A are provided on the operation disc A and are evenly distributed in a ring around the lead screw A; The inner sleeve A is fixedly connected to the nut A and encloses the threaded rod section of the lead screw A through its inner hole; The inner side of the outer sleeve A is provided with guiding edges, which are fixedly installed on the tank body A on the outside, and are slidably matched with the guide groove A of the nut A through the guiding edges on the inside, and the outer sleeve A is movably sleeved outside the inner sleeve A through its inner hole; The upper end of the extension rod A is fixedly connected to the lower end of the inner sleeve A; The inner sealing cover A is in a conical ring shape and is fixedly installed at the lower end of the extension rod A, and is used to open or close the discharge port A at the bottom of the tank body A; The outer protective cover includes an upper seat body, a lower seat body, a spring and an L-shaped rocker; The upper seat body includes an upper sealing plate, a corner connecting plate and a lower adsorption plate fixedly connected in sequence from top to bottom; The upper end surface of the upper sealing plate is used to fit or separate from the upper pressing plate of the storage tank, so as to open or close the discharge port A of the storage tank. A ring-shaped boss X for accommodating the spring is provided in the central area of the lower end surface of the upper sealing plate. A plurality of corner connecting plates are evenly distributed in a ring around the ring-shaped boss X between the upper sealing plate and the lower adsorption plate. The upper end of the corner connecting plate is welded to the lower end surface of the upper sealing plate, and the lower end of the corner connecting plate is welded to the upper end surface of the lower adsorption plate. A central hole A for the lower seat body to pass through is provided at the center of the lower adsorption plate; The lower seat body includes a lower pushing plate and an upper ring plate fixedly connected in sequence from bottom to top; A ring-shaped boss Y for accommodating the spring is provided in the central area of the upper end surface of the lower pushing plate. A plurality of guiding grooves X are provided on the upper end surface of the lower pushing plate and are evenly distributed in a ring around the ring-shaped boss Y. The upper ring plate is arranged at the upper end of the ring-shaped boss Y and extends radially outward of the ring-shaped boss Y; An annular open area is provided between the outer side of the lower seat body at the ring-shaped boss Y, the lower end of the upper ring plate and the upper end of the lower pushing plate; The lower seat body is movably inserted into the lower open end of the ring-shaped boss X of the upper seat body through the upper open end of the ring-shaped boss Y, so that the ring-shaped boss X of the upper seat body is internally communicated with the ring-shaped boss Y of the lower seat body to form a spring placement cavity;The upper end of the L-shaped rocker is provided with a hook portion, the lower end is provided with a roller A, and the middle part is provided with a turning portion. The turning portion of the L-shaped rocker is hinged to the lower end head of the angled connecting plate. The roller A of the L-shaped rocker is limited within the annular open interval, and the lower end of the roller A is embedded in the guide groove X; the spring is compressively arranged in the spring placement cavity, and it forces the lower seat body to move away from the upper seat body through elastic force, thereby driving the L-shaped rocker to rotate towards the inner side of the storage tank around its hinge point, so that the hook portion of the L-shaped rocker hooks the upper pressing plate of the storage tank; when an external force pushes the lower seat body to move towards the upper seat body, it drives the L-shaped rocker to rotate towards the outer side of the storage tank around its hinge point, so that the hook portion of the L-shaped rocker disengages from the upper pressing plate of the storage tank.

[0017] A further technical solution of the present invention is: the storage tank translation trolley includes a vehicle body A and an electric push rod A; the lower end of the vehicle body A is provided with rollers B, and the upper end of the vehicle body A is provided with a plurality of horizontally arranged guide rollers. All the guide rollers together enclose a plurality of square-shaped areas, and the square-shaped area is the placement station B. The vehicle body A is provided with a blanking hole A in each placement station B; the vehicle body A is installed on the horizontal track A by rolling the rollers B; the cylinder body of the electric push rod A is fixedly installed on the horizontal track A, the piston rod of the electric push rod A is fixedly connected to the vehicle body A, and when the piston rod of the electric push rod A expands and contracts, it drives the vehicle body A to make a horizontal reciprocating linear movement along the horizontal track A; when the storage tank is placed in any placement station B of the storage tank translation trolley, the discharge port A of the storage tank is aligned with the blanking hole A in this placement station B; when the storage tank is placed in the target placement station B on the storage tank translation trolley, the guide rollers on the four sides of the target placement station B contact the four legs at the lower end of the storage tank to correct the deviation and adjust the posture of the storage tank, so as to limit the storage tank in the placement station B; when the storage tank translation trolley moves with the storage tank placed in the placement station B, there are a third docking position, a fourth docking position and a fifth docking position in the moving path of the storage tank.

[0018] A further technical solution of the present invention is that the disassembly and assembly device for the outer cover of the storage tank includes an electric push rod B, a bracket, a traction electromagnet, and a ring electromagnet; the cylinder body of the electric push rod B is directly or indirectly fixedly installed on the ground of the first-floor space, and the piston rod of the electric push rod B extends vertically upward; the bracket is directly or indirectly fixedly connected to the piston rod of the electric push rod B, and a central hole B is provided at its top, and an electromagnet placement cavity communicating with the central hole B is provided inside it; the ring electromagnet is fixedly installed at the upper end of the bracket, and a central hole C is provided at its center, and the central hole B of the bracket is included therein through the central hole C; the lower end of the traction electromagnet is fixedly installed in the electromagnet placement cavity of the bracket, and the upper end extends out of the central hole B of the bracket and is located in the central hole C of the ring electromagnet. The upper end of the traction electromagnet makes a reciprocating linear movement in the vertical direction, so as to extend to the upper end of the ring electromagnet or retract into the central hole C of the ring electromagnet; when the storage tank with the outer protective cover moves to the fourth docking position, and the disassembly and assembly device for the outer cover of the storage tank does not adsorb the outer protective cover, the lower adsorption plate of the outer protective cover is located directly above the ring electromagnet, and the lower push plate of the outer protective cover is located directly above the traction electromagnet, so as to facilitate the disassembly and assembly device for the outer cover of the storage tank to disassemble the outer protective cover of the storage tank; when the storage tank without the outer protective cover moves to the fourth docking position, and the disassembly and assembly device for the outer cover of the storage tank adsorbs the outer protective cover, the lower adsorption plate of the outer protective cover is magnetically attracted to the ring electromagnet, and the lower push plate of the outer protective cover is magnetically attracted to the traction electromagnet, and the upper sealing plate of the outer protective cover is located directly below the upper pressing plate of the storage tank, so as to facilitate the disassembly and assembly device for the outer cover of the storage tank to install the outer protective cover of the storage tank.

[0019] A further technical solution of the present invention is that the opening and closing device for the inner cover of the storage tank includes a gantry A, a lifting drive device A, a rotary drive motor B, and a docking plate; the gantry A is directly or indirectly fixedly installed on the overhead slide; the lifting drive device A is fixedly installed on the gantry A; the rotary drive motor B is fixedly installed on the lifting drive device A and is driven by the lifting drive device A to make a vertical lifting movement; the docking plate is fixedly connected to the lower end of the rotary drive motor B and is driven by the rotary drive motor B to make a horizontal rotation. A plurality of finger rods for inserting into the jack A of the operation panel A of the storage tank are provided at the lower end of the docking plate; when the storage tank moves to the third docking position, the operation panel A of the storage tank is located directly below the docking plate of the opening and closing device for the inner cover of the storage tank, so as to facilitate the opening and closing device for the inner cover of the storage tank to open or close the discharge port A of the storage tank.

[0020] A further technical solution of the present invention is as follows: The transfer tank includes a tank body B, an upper sealing cover, a lead screw B, a nut B, an operation disc B, an inner sleeve B, an outer sleeve B, an extension rod B, and an inner sealing cover B; a guiding section is provided at the lower end of the tank body B, and the guiding section is a regular quadrangular prism with arc transitions at the edges. An inner cavity B is provided inside the tank body B, a discharge port B is provided at the bottom of the tank body B, and a plurality of feed ports are provided at the top of the tank body B. All the feed ports are evenly distributed in a ring around the central axis of the tank body B; the upper sealing cover is detachably installed on each feed port; the lead screw B is movably installed in the inner cavity B of the tank body B, and its central axis coincides with the central axis of the tank body B. The lead screw B is successively provided with an operation section, a smooth rod section, and a threaded rod section from top to bottom. The operation section of the lead screw B extends out of the upper end of the tank body B, and the lead screw B is rotatably connected to the tank body B through tapered roller bearings on the smooth rod section; the nut B is threadedly connected to the threaded rod section of the lead screw B, and a guiding groove B is provided on the outer side wall surface of the nut B; the operation disc B is fixedly installed on the operation section of the lead screw B, and a plurality of jacks B evenly distributed in a ring around the lead screw B are provided thereon; the inner sleeve B is fixedly connected to the nut B and encloses the threaded rod section of the lead screw B through its inner hole; the outer sleeve B is movably sleeved outside the inner sleeve B through its inner hole, a guiding strip is provided on its inner side, it is fixedly installed on the tank body B on the outer side, and it is slidably matched with the guiding groove B of the nut B through the guiding strip on the inner side; the upper end of the extension rod B is fixedly connected to the lower end of the inner sleeve B; the inner sealing cover B is in a conical ring shape and is fixedly connected to the lower end of the extension rod B, and it is used to open or close the discharge port B at the bottom of the tank body B.

[0021] A further technical solution of the present invention is as follows: The material merging assembly further includes a negative pressure dust removal device; the negative pressure dust removal device includes a filtering unit, a branch pipe, a main pipe, a hose, and a negative pressure fan; a plurality of filtering units are evenly distributed in a ring on the top of the tank body B of the transfer tank. A filter element for filtering radioactive dust is provided inside the filtering unit. The two ends of the filtering unit are respectively an air inlet end and an air outlet end, and the air inlet end of the filtering unit extends into the inner cavity B of the transfer tank; the number of filtering units is the same as the number of feed ports, and moreover, a filtering unit is arranged at the middle position between every two adjacent feed ports; the main pipe is provided with a main air outlet and a plurality of air inlets, the number of air inlets is the same as the number of filtering units, a ball valve for controlling the on-off of air flow and a quick pipe joint for docking the hose are provided on the main air outlet; the number of branch pipes is the same as the number of filtering units, one end of the branch pipe is communicated with the air outlet end of the corresponding filtering unit, and the other end of the branch pipe is communicated with the corresponding air inlet on the main pipe; one end of the hose is detachably connected to the quick pipe joint on the main air outlet of the main pipe, the other end is detachably connected to the air inlet end of the negative pressure fan, and the air outlet end of the negative pressure fan is communicated with the atmosphere.

[0022] A further technical solution of the present invention is as follows: The transfer tank includes a tank body B, an upper sealing cover, a screw rod B, a nut B, an operation disk B, an inner sleeve B, an outer sleeve B, an extension rod B, an inner sealing cover B, and a vibration motor; The lower end of the tank body B is provided with a guiding section, which is a regular quadrangular prism with arc transitions at the edges. The inner cavity B is provided inside the tank body B, and the discharge port B is provided at the bottom of the tank body B. Only one feed port is provided at the top of the tank body B; The upper sealing cover is detachably installed on the feed port; The screw rod B is movably installed in the inner cavity B of the tank body B, and its axis coincides with the center line of the tank body B. The screw rod B is sequentially provided with an operation section, a smooth rod section, and a threaded rod section from top to bottom. The operation section of the screw rod B extends out of the upper end of the tank body B, and the screw rod B is rotatably connected to the tank body B through tapered roller bearings at the smooth rod section; The nut B is threadedly connected to the threaded rod section of the screw rod B, and a guiding groove B is provided on the outer side wall surface of the nut B; The operation disk B is fixedly installed on the operation section of the screw rod B, and a plurality of jacks B evenly distributed in a ring around the screw rod B are provided thereon; The inner sleeve B is fixedly connected to the nut B and encloses the threaded rod section of the screw rod B through its inner hole; The outer sleeve B is movably sleeved outside the inner sleeve B through its inner hole. A guiding strip is provided on its inner side, and it is fixedly installed on the tank body B on the outer side. It is slidably matched with the guiding groove B of the nut B through the guiding strip on the inner side; The upper end of the extension rod B is fixedly connected to the lower end of the inner sleeve B; The inner sealing cover B is in a conical ring shape and is fixedly connected to the lower end of the extension rod B, and it is used to open or close the discharge port B at the bottom of the tank body B; The vibration motor is fixedly installed on the upper side wall of the tank body B.

[0023] A further technical solution of the present invention is as follows: The material merging assembly further includes a negative pressure dust removal device; The negative pressure dust removal device includes a filtering unit, a branch pipe, a main pipe, a hose, and a negative pressure fan; A plurality of filtering units and one feed port are evenly distributed in a ring on the top of the tank body B of the transfer tank. A filter element for filtering radioactive dust is provided inside the filtering unit. The two ends of the filtering unit are respectively an air inlet end and an air outlet end, and the air inlet end of the filtering unit extends into the inner cavity B of the transfer tank; One main air outlet and a plurality of air inlets are provided on the main pipe. The number of air inlets is the same as the number of filtering units. A ball valve for controlling the on-off of the air flow is provided on the main air outlet; The number of branch pipes is the same as the number of filtering units. One end of the branch pipe is communicated with the air outlet end of the corresponding filtering unit, and the other end of the branch pipe is communicated with the corresponding air inlet on the main pipe; One end of the hose is detachably connected to the main air outlet of the main pipe through a quick pipe joint, and the other end is detachably connected to the air inlet end of the negative pressure fan. The air outlet end of the negative pressure fan is communicated with the atmosphere.

[0024] A further technical solution of the present invention is that the transfer tank rotating device includes a lower base, a rotary drive motor A, an upper turntable, a limit frame and a first guide roller; the lower base is directly or indirectly fixedly installed on the ground of the first-floor space; the rotary drive motor A is fixedly installed on the lower base; the upper turntable is fixedly installed at the upper end of the rotary drive motor A and rotates horizontally under the drive of the rotary drive motor A. A plurality of rollers parallel to each other and horizontally arranged are provided at the upper end of the upper turntable. The rollers are arranged in three parallel columns at the upper end of the upper turntable. The middle column of rollers is a non-electrically driven roller, and the two columns of rollers on both sides are electrically driven rollers. A rolling conveying surface A is formed above all the rollers, and one end of the rolling conveying surface A in the conveying direction is the inlet / outlet A; the limit frame is fixedly installed on the upper turntable and is located at the other end of the rolling conveying surface A in the conveying direction. A limit electromagnet is embedded in the limit frame; two columns of first guide rollers are vertically arranged and rotatably installed on the upper turntable and are located on both sides of the rolling conveying surface A in the conveying direction. Each column of first guide rollers is composed of a plurality of first guide rollers vertically arranged and arranged in a horizontal row; the two columns of first guide rollers and the limit frame enclose the placement station A; when the transfer tank enters the rolling conveying surface A through the inlet / outlet A, the two columns of first guide rollers respectively contact two surfaces on the guiding section of the transfer tank, and the limit electromagnet on the limit frame is used to adsorb one surface on the guiding section of the transfer tank, so as to limit the transfer tank in the placement station A; when the transfer tank rotating device drives the transfer tank placed in the placement station A to rotate, there are a first docking position and a second docking position in the rotation path of the upper sealing cover of the transfer tank.

[0025] A further technical solution of the present invention is that the upper cover disassembly and assembly device of the transfer tank includes a lifting drive device B, a first extension rod and an electromagnetic chuck; the lifting drive device B is directly or indirectly fixedly installed on the overhead slide; the upper end of the first extension rod is fixedly connected to the lifting drive device B and is driven by the lifting drive device B to perform vertical lifting movement; the electromagnetic chuck is fixedly connected to the lower end of the first extension rod; when the transfer tank rotates to the first docking position, the upper sealing cover of the transfer tank is directly below the electromagnetic chuck of the upper cover disassembly and assembly device of the transfer tank, so as to facilitate the upper cover disassembly and assembly device of the transfer tank to disassemble or install the upper sealing cover of the transfer tank.

[0026] A further technical solution of the present invention is as follows: The lower pipeline docking device includes a bracket A, a middle pipeline, an upper movable pipeline, a lower movable pipeline, a linear motor A, a linear motor B, a connecting rod A and a connecting rod B; The bracket A is fixedly installed on the overhead sliding table; The middle pipeline is fixedly installed on the bracket A; The upper movable pipeline and the lower movable pipeline are respectively movably inserted into the inner wall of the upper end and the outer wall of the lower end of the middle pipeline, and respectively extend out from the upper port and the lower port of the middle pipeline. There are two oppositely arranged third hinge parts on the outer wall of the upper end of the upper movable pipeline, and two oppositely arranged fourth hinge parts on the outer wall of the lower end of the lower movable pipeline; The linear motor A includes a base A, a guide rail A and a slider A. The base A is fixedly installed at the upper end of the bracket A, the guide rail A is horizontally installed on the base A, and the slider A is slidably installed on the guide rail A. The number of linear motors A is two, and the two linear motors A are symmetrically arranged with respect to the middle pipeline; The linear motor B includes a base B, a guide rail B and a slider B. The base B is fixedly installed at the lower end of the bracket A, the guide rail B is horizontally installed on the base B, and the slider B is slidably installed on the guide rail B. The number of linear motors B is two, and the two linear motors B are symmetrically arranged with respect to the middle pipeline; Two connecting rods A are distributed on both sides of the middle pipeline. One ends of the two connecting rods A are respectively hinged to the sliders A of the two linear motors A, and the other ends of the two connecting rods A are respectively hinged to the two third hinge parts of the upper movable pipeline; Two connecting rods B are distributed on both sides of the middle pipeline. One ends of the two connecting rods B are respectively hinged to the sliders B of the two linear motors B, and the other ends of the two connecting rods B are respectively hinged to the two fourth hinge parts of the lower movable pipeline; When the transfer tank rotates to the second docking position, the feed port of the transfer tank is located directly below the lower movable pipeline of the lower pipeline docking device, so as to facilitate the lower pipeline docking device to dock with the transfer tank; When the storage tank moves to the fifth docking position, the discharge port A of the storage tank is located directly above the upper movable pipeline of the lower pipeline docking device, so as to facilitate the lower pipeline docking device to dock with the storage tank.

[0027] A further technical solution of the present invention is as follows: The transfer tank translation trolley includes a vehicle body B and a limiting component; the lower end of the vehicle body B is provided with driving wheels B, and the upper end of the vehicle body B is provided with a plurality of rollers arranged in parallel and horizontally. The rollers are arranged in four parallel columns above the vehicle body B. The two middle columns of rollers are non-electrically driven rollers, and the two columns of rollers on both sides are electrically driven rollers. A rolling conveying surface B is formed above all the rollers. One end of the rolling conveying surface B in the conveying direction is the inlet / outlet B. A first avoidance area and a second avoidance area are formed between the two middle columns of rollers. The first avoidance area and the second avoidance area are respectively located at both ends of the rolling conveying surface B in the conveying direction; there is a vacant area not covered by the rollers at the center of the upper end of the vehicle body B, and a blanking hole B is provided in the vehicle body B in the vacant area; the limiting component includes a second guiding roller, a front air cylinder, a front limiting plate, a rear air cylinder and a rear limiting plate; two columns of second guiding rollers are vertically arranged and rotatably installed on the vehicle body B and are located on both sides of the rolling conveying surface B in the conveying direction. Each column of second guiding rollers is composed of a plurality of second guiding rollers vertically arranged and arranged in a horizontal row; the lower side edge of the front limiting plate is hinged above the vehicle body B and is located in the first avoidance area; the cylinder body of the front air cylinder is hinged above the vehicle body B and is located in the first avoidance area. The piston rod of the front air cylinder is hinged to the front limiting plate. The piston rod of the front air cylinder expands and contracts to drive the front limiting plate to rotate around its lower side edge, so that the front limiting plate extends above the rolling conveying surface B or retracts below the rolling conveying surface B; the lower side edge of the rear limiting plate is hinged above the vehicle body B and is located in the second avoidance area; the cylinder body of the rear air cylinder is hinged above the vehicle body B and is located in the second avoidance area. The piston rod of the rear air cylinder is hinged to the rear limiting plate. The piston rod of the rear air cylinder expands and contracts to drive the rear limiting plate to rotate around its lower side edge, so that the rear limiting plate extends above the rolling conveying surface B or retracts below the rolling conveying surface B; the two columns of second guiding rollers, the front limiting plate and the rear limiting plate enclose to form the placement station C; the vehicle body B is rollingly installed on the horizontal track B through the driving wheels B and makes a reciprocating linear movement along the horizontal track B; when the transfer tank enters the rolling conveying surface B through the inlet / outlet B, the two columns of second guiding rollers respectively contact two surfaces on the guiding section of the transfer tank, and the front limiting plate extending above the rolling conveying surface B and the rear limiting plate extending above the rolling conveying surface B respectively abut against the other two surfaces on the guiding section of the transfer tank, so as to limit the transfer tank in the placement station C; when the transfer tank is limited in the placement station C, the discharge port B of the transfer tank is directly opposite to the blanking hole B; there are a tank transfer position and a feeding position in the movement path of the transfer tank translation trolley; when the transfer tank translation trolley is at the tank transfer position, the inlet / outlet B of the transfer tank translation trolley is directly or indirectly communicated with the upper open end of the transfer elevator to realize the two-way transmission of the transfer tank; when the transfer tank translation trolley is at the feeding position, the transfer tank placed in the placement station C is docked with the transfer silo through the upper pipeline docking device.

[0028] A further technical solution of the present invention is as follows: The upper pipeline docking device includes a lifting drive device C, a docking pipe, a bracket C, a rotary drive motor D, a second extension rod, and a cover plate; The lifting drive device C is fixedly installed on the ground of the third - layer space and is fixedly connected to the vertically arranged docking pipe, and is used to drive the docking pipe to perform vertical lifting movement; The lower end of the docking pipe passes through the ground of the third - layer space and enters the second - layer space, and the upper end of the docking pipe extends out in the third - layer space. During the vertical lifting movement of the docking pipe, an upper limit position and a lower limit position are successively arranged from top to bottom. During the vertical lifting movement of the docking pipe, the lower port of the docking pipe always extends into the feeding port of the transfer bin; The bracket C is fixedly installed on the ground of the third - layer space; The rotary drive motor D is fixedly installed on the bracket C, and its shaft horizontally extends and is fixedly connected to the front end of the second extension rod; The cover plate is fixedly connected to the rear end of the second extension rod and rotates under the drive of the rotary drive motor D, thereby covering or opening the upper port of the docking pipe; When the transfer tank placed in the placement station C moves to the feeding position with the transfer tank translation trolley, the docking pipe vertically rises to the upper limit position, that is, the upper port of the docking pipe passes through the blanking hole B of the transfer tank translation trolley and docks with the discharge port B of the transfer tank. The docking pipe vertically descends to the lower limit position, that is, the upper port of the docking pipe withdraws from the blanking hole B of the transfer tank translation trolley and separates from the discharge port B of the transfer tank.

[0029] A further technical solution of the present invention is as follows: The inner - cover opening - closing device of the transfer tank includes a gantry B, a lifting drive device D, a rotary drive motor C, and a plug - in disk; The gantry B is directly or indirectly fixedly installed on the vehicle body B of the transfer tank translation trolley; The lifting drive device D is fixedly installed on the gantry B and is fixedly connected to the rotary drive motor C, and is used to drive the rotary drive motor C to perform vertical lifting movement; The shaft of the rotary drive motor C vertically extends downward; The plug - in disk is fixedly connected to the shaft of the rotary drive motor C and is driven by the rotary drive motor C to perform horizontal rotation. Multiple insertion rods for inserting into the jack B of the transfer tank operation panel B are provided at the lower end of the plug - in disk of the docking disk; When the transfer tank is limited in the placement station C, the operation panel B of the transfer tank is located directly below the plug - in disk of the inner - cover opening - closing device of the transfer tank, so as to facilitate the inner - cover opening - closing device of the transfer tank to open or close the discharge port B of the transfer tank.

[0030] A further technical solution of the present invention is as follows: It further includes a first conveyor belt, a second conveyor belt, and a third conveyor belt; The first conveyor belt is arranged between the placement station A of the transfer tank rotating device and the lower open - top of the transfer elevator, and is used for two - way transmission of the transfer tank between the placement station A and the lower open - top; The second conveyor belt is arranged between the placement station C of the transfer tank translation trolley and the upper open - top of the transfer elevator, and is used for two - way transmission of the transfer tank between the placement station C and the upper open - top; The third conveyor belt is arranged adjacent to the transfer tank rotating device and is used to transfer the transfer tank to the placement station A of the transfer tank rotating device.

[0031] A further technical solution of the present invention is that the number of the disassembly and assembly devices for the outer cover of the storage tank is the same as the number of the placement stations B on the transfer trolley of the storage tank.

[0032] The present invention has the following advantages compared with the prior art:

[0033] 1. On the basis of the traditional feeding process (multiple sealed containers are sequentially transported from the first floor of the factory building to the third floor of the factory building for feeding), the feeding process is optimized (the materials in multiple storage tanks are combined and fed into a transfer tank, and then the transfer tank is transported to the third floor of the factory building for one-time feeding), realizing the automatic feeding of UO2 powder materials in the uranium conversion process, and significantly improving the efficiency of the feeding operation.

[0034] 2. The optimized feeding process can be generally divided into two steps: multiple small tank materials are combined and fed into a transfer tank; the transfer tank is transported to the third floor of the factory building for one-time feeding;

[0035] Among them, the first step is the most complex part of the entire feeding process, which requires the linkage and cooperation of multiple components, and the design difficulty of automatic control is relatively high. Therefore, it is arranged on the first floor of the factory building with a relatively suitable environment, which is convenient for operators to control and manage;

[0036] Among them, the second step is the relatively simple part of the entire feeding process, involving relatively few components for linkage and cooperation, and the design difficulty of automatic control is relatively low. Therefore, it is arranged on the third floor of the factory building, so that the third floor of the factory building with a relatively harsh environment does not need to be equipped with operators, reducing the working intensity of the operators, avoiding the damage of the operators from dust and radiation, and moreover, within a working cycle of the feeding operation, only one input and one output of a transfer tank occur on the third floor of the factory building, and the number of actions of each component is small, and the probability of failure and error is relatively low.

[0037] 3. The storage tank is equipped with two types of covers, an inner cover (inner sealing cover A) and an outer cover (outer protective cover), which can fully meet the requirements of sealed storage, automatic feeding, automatic opening and closing of the cover, and transportation safety of UO2 powder materials in the tank;

[0038] Among them, the inner cover mainly plays the role of sealing and preventing leakage. By turning the operation panel A at the upper end of the storage tank, the lifting and moving of the inner cover can be controlled, and then the opening and closing of the discharge port A of the storage tank can be realized. On the one hand, the operation panel A for controlling the opening and closing of the inner cover is open at the upper end of the storage tank, which is convenient for the manipulator to touch and operate to realize automatic feeding. On the other hand, when the inner cover is opened, a gradually expanding annular gap is formed, so that the material falls evenly and the speed is controllable, avoiding a large amount of dust generated by dumping type material falling.

[0039] Among them, the outer cover mainly serves to meet the needs of automatic feeding and ensure transportation safety. The structure of the outer cover is adapted to the structure of the disassembly and assembly device for the outer cover of the storage tank. The outer cover is removed from or installed on the discharge port A of the storage tank through the disassembly and assembly device for the outer cover of the storage tank, eliminating the need for manual cover removal or installation. Additionally, when the outer cover is installed on the discharge port A of the storage tank, it cannot be disassembled without damage using common hardware tools. Only the disassembly and assembly device for the outer cover of the storage tank can be used to disassemble the cover, ensuring that the storage tank containing UO2 powder is in a protected (or locked) state during transportation.

[0040] 4.1. On the one hand, multiple feed ports are provided at the top of the transfer tank and are evenly distributed in a ring shape. On the other hand, in the material merging process (corresponding to step S03 of the feeding operation), each storage tank is respectively docked with a specific feed port on the transfer tank for feeding, thereby forming multiple "hills" composed of UO2 powder in the transfer tank. All the "hills" are evenly distributed in a ring shape and interfere with each other, effectively reducing the undulation height after the accumulation of UO2 powder, contributing to the full utilization of the internal space of the transfer tank, enabling the volume of the transfer tank to be designed relatively smaller, reducing the manufacturing cost of the transfer tank, and being more convenient for transportation and management at the same time.

[0041] 4.2. On the one hand, only one feed port is provided at the top of the transfer tank, and a vibration motor is provided on the side wall of the transfer tank. On the other hand, in the material merging process (corresponding to step S03 of the feeding operation), each storage tank is docked with the only feed port on the transfer tank for feeding. When the transfer tank is docked with different storage tanks, there is no need to rotate and adjust the posture, greatly reducing the docking difficulty and control difficulty. The setting of the vibration motor can prevent the accumulation of UO2 powder in the transfer tank to form "hills", effectively reducing the undulation height after the accumulation of UO2 powder, contributing to the full utilization of the internal space of the transfer tank, enabling the volume of the transfer tank to be designed relatively smaller, reducing the manufacturing cost of the transfer tank, and being more convenient for transportation and management at the same time.

[0042] 5. In the material merging process (corresponding to step S03 of the feeding operation), the negative pressure dust removal device is used to suppress the dust in the transfer tank and prevent UO2 powder from drifting out of the feed port of the transfer tank, causing radioactive pollution to the external environment. In Embodiment 1, multiple filter units in the negative pressure dust removal device and one feed port are evenly distributed in a ring shape on the top of the tank body B of the transfer tank. In Embodiment 2, multiple filter units in the negative pressure dust removal device are evenly distributed in a ring shape on the top of the tank body B of the transfer tank. Starting the negative pressure fan can form a multi-point, small-flow, small-range air extraction effect at the air inlet ends of all the filter units, thereby dispersing the total air extraction flow to the air inlet ends of each filter unit. On the one hand, it effectively suppresses the dust, and on the other hand, it avoids sucking away excessive UO2 powder.

[0043] 6. In the material merging step (corresponding to step S03 of the feeding operation), the moving path of the storage tank is a linear reciprocating movement, the moving path of the transfer tank is a fixed-point rotation, and the moving paths of the storage tank and the transfer tank are arranged with a vertical offset in space; the storage tank performs the operations of disassembling and installing the outer protective cover and discharging powder materials at both ends of its moving path, and the transfer tank performs the operations of docking with the storage tank or disassembling and installing the upper sealing cover when rotating to a specific angle; the movement routes, action modes, and spatial offset arrangement of the storage tank and the transfer tank make the material merging step simple and efficient, without redundant ineffective movements / actions.

[0044] The present invention will be further described below in conjunction with the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic structural diagram of the present invention;

[0046] Figure 2 is a schematic structural diagram of the factory building;

[0047] Figure 3 is an external view of the storage tank;

[0048] Figure 4 is Figure 3 an enlarged view of part A of

[0049] Figure 5 is an internal structural diagram of the storage tank;

[0050] Figure 6 is Figure 5 an enlarged view of part B of

[0051] Figure 7 is Figure 5 a C-C cross-sectional view of

[0052] Figure 8 is a state diagram when the outer cover disassembly and installation device of the storage tank removes the outer protective cover;

[0053] Figure 9 is a state diagram when the outer cover disassembly and installation device of the storage tank installs the outer protective cover;

[0054] Figure 10 is a schematic structural diagram and installation position diagram of the storage tank translation trolley;

[0055] Figure 11 is a schematic structural diagram of the transfer tank rotating device;

[0056] Figure 12 is a schematic structural diagram of the lower pipeline docking device;

[0057] Figure 13 is a schematic structural diagram of the upper pipeline docking device;

[0058] Figure 14 Schematic structural diagram of the transfer tank translation trolley;

[0059] Figure 15 Assembly relationship diagram of some components of the transfer tank translation trolley;

[0060] Figure 16 Schematic structural diagram and installation position diagram of the inner cover opening and closing device of the storage tank, the upper cover disassembly and assembly device of the transfer tank, and the lower pipeline docking device;

[0061] Figure 17 For Figure 16 Enlarged view of part D;

[0062] Figure 18 For Figure 16 Enlarged view of part E;

[0063] Figure 19 For Figure 16 Enlarged view of part F;

[0064] Figure 20 Schematic structural diagram of the material feeding assembly;

[0065] Figure 21 Schematic structural diagram of the material merging assembly;

[0066] Figure 22 Assembly relationship diagram of some components of the transfer tank and the negative pressure dust removal device in Embodiment 1;

[0067] Figure 23 Schematic internal structure diagram of the transfer tank in Embodiment 1;

[0068] Figure 24 For Figure 23 Enlarged view of part H;

[0069] Figure 25 For Figure 23 Enlarged view of part I;

[0070] Figure 26 Assembly relationship diagram of some components of the transfer tank and the negative pressure dust removal device in Embodiment 2.

[0071] Note: Figure 1 In order to avoid the components in the first - layer space being blocked, the ground and the transfer bin in the second - layer space are omitted and not drawn. Figure 7 The operation panel A in is omitted and not drawn. Figure 12 The horizontal track A in is omitted and not drawn.

[0072] Legend: First - floor space 11; Second - floor space 12; Third - floor space 13; Overhead sliding table 14; Horizontal track A15; Transfer silo 16; Horizontal track B17; Transfer elevator 18; Lower open - end 181; Upper open - end 182; Tank A21; Inner cavity A211; Discharge port A212; Annular step 213; Leg 214; Upper pressure plate 215; Screw rod A22; Nut A23; Operation panel A24; Jack A241; Inner sleeve A25; Outer sleeve A26; Guide rib 261; Extension rod A27; Inner sealing cover A28; Upper seat body 292; Upper sealing plate 2921; Angular connecting plate 2922; Lower adsorption plate 2923; Annular boss X2924; Lower seat body 293; Lower pushing plate 2931; Upper annular plate 2932; Annular boss Y2933; Annular open area 2934; Spring placement cavity 2935; L - shaped rocker 294; Hook part 2941; Roller A2942; Turning part 2943; Spring 295; Tank B31; Inner cavity B311; Discharge port B312; Feed port 313; Guide section 314; Upper sealing cover 32; Screw rod B33; Nut B34; Operation panel B35; Jack B351; Inner sleeve B36; Outer sleeve B37; Guide strip 371; Extension rod B38; Inner sealing cover B39; Vibration motor 30; Lower base 411; Rotary drive motor A412; Upper turntable 413; Limit frame 414; Limit electromagnet 4141; First guide roller 415; Inlet / outlet A416; Placement station A417; Vehicle body A421; Roller B422; Placement station B423; Blank - discharging hole A424; Electric push rod A425; Electric push rod B431; Bracket 432; Central hole B4321; Electromagnet placement cavity 4322; Annular electromagnet 433; Central hole C4331; Traction electromagnet 434; Gantry A441; Lifting drive device A442; Rotary drive motor B443; Docking plate 444; Finger rod 4441; Lifting drive device B451; First extension rod 452; Electromagnetic chuck 453; Bracket A461; Middle pipeline 462; Upper movable pipeline 463; Lower movable pipeline 464; Linear motor A465; Base A4651; Guide rail A4652; Slide block A4653; Linear motor B466; Base B4661; Guide rail B4662; Slide block B4663; Connecting rod A467; Connecting rod B468; Filter unit 471; Main pipe 472; Branch pipe 473; Flexible hose 474; Negative - pressure fan 475; Vehicle body B511; Driving wheel B512; Inlet / outlet B513; Blank - discharging hole B514; Second guide roller 515; Front limit plate 516, Front cylinder 517; Rear limit plate 518; Rear cylinder 519; Placement station C510; Lifting drive device C521; Docking pipe 522; Bracket C523, Rotary drive motor D524; Second extension rod 525; Cover plate 526; Gantry B531; Lifting drive device C532; Rotary drive motor C533; Plug - in plate 534; Plug rod 5341;The first conveyor belt 100; the second conveyor belt 200; the third conveyor belt 300.; Detailed implementation mode Example 1

[0073] As Figure 1 - 25 As shown in the figure, the automatic feeding system for radioactive powder materials includes a workshop, a storage tank, a transfer tank, a material merging assembly and a material feeding assembly. The material merging assembly includes a transfer tank rotating device, a storage tank translation trolley, a storage tank outer cover disassembly and assembly device, a storage tank inner cover opening and closing device, a transfer tank upper cover disassembly and assembly device, a lower pipeline docking device and a negative pressure dust removal device. The material feeding assembly includes a transfer tank translation trolley, an upper pipeline docking device and a transfer tank inner cover opening and closing device.

[0074] Inside the workshop, a first - floor space 11, a second - floor space 12 and a third - floor space 13 are arranged in sequence from bottom to top. Inside the workshop, a transfer elevator 18 is installed, which penetrates the first - floor space 11, the second - floor space 12 and the third - floor space 13 from bottom to top. The transfer elevator 18 is respectively provided with a lower open - end 181 and an upper open - end 182 in the first - floor space 11 and the third - floor space 13. The transfer elevator 18 is used to receive or discharge the transfer tank at the lower open - end 181, or receive or discharge the transfer tank at the upper open - end 182, or lift the transfer tank filled with materials from the first - floor space 11 to the third - floor space 13, or lower the empty transfer tank from the third - floor space 13 to the first - floor space 11. The specific structure of the transfer elevator 18 is the prior art, and reference can be made to the description of the "lifting elevator" in the patent document CN113443329A, which will not be elaborated here. An overhead sliding table 14 and a jib crane (not shown in the figure) are installed in the first - floor space 11. A horizontal track A15 is provided on the overhead sliding table 14. A transfer silo 16 is placed in the second - floor space 12, and a feed inlet is provided at the upper end of the transfer silo 16. A horizontal track B17 is provided on the ground (or floor) of the third - floor space 13. One end of the horizontal track B17 is close to the upper open - end 182 of the transfer elevator 18, and the other end is far from the upper open - end 182 of the transfer elevator 18.

[0075] The storage tank includes a tank body A21, a lead screw A22, a nut A23, an operation panel A24, an inner sleeve A25, an outer sleeve A26, an extension rod A27, an inner sealing cover A28 and an outer protective cover.

[0076] Inside the tank body A21, there is an inner cavity A211 for containing UO2 powder material. At the bottom of the tank body A21, there is a discharge port A212 communicating with the inner cavity A211. On the lower outer wall of the tank body A21 near the discharge port A212, there is an annular step 213. On the annular step 213 of the tank body A21, a ring-shaped upper pressing plate 215 is welded. The upper pressing plate 215 extends radially outward of the storage tank. At the lower end of the tank body A21, four legs 214 are welded in a circumferential and uniform distribution. The lead screw A22 is movably installed in the inner cavity A211 of the tank body A21 and is arranged at the center of the inner cavity A211 of the tank body A21 along the axial direction of the tank body A21. The lead screw A22 is successively provided with an operation section, a smooth rod section, and a threaded rod section from top to bottom. The operation section of the lead screw A22 extends out of the upper end of the tank body A21. The lead screw A22 is rotatably connected to the tank body A21 through a ball bearing at the smooth rod section. The nut A23 is threadedly connected to the threaded rod section of the lead screw A22. The nut A23 is provided with a guide groove A on its outer side wall surface. The operation disk A24 is fixedly installed on the operation section of the lead screw A22. The operation disk A24 is provided with a plurality of jacks A241 evenly distributed in a ring around the lead screw A22. The inner sleeve A25 is fixedly connected to the nut A23 and encloses the threaded rod section of the lead screw A22 through its inner hole. The outer sleeve A26 is movably sleeved outside the inner sleeve A25 through its inner hole. It is provided with a guide rib 261 on its inner side. It is fixedly installed on the tank body A21 on its outer side. It is slidably matched with the guide groove A of the nut A23 through the guide rib 261 on its inner side. The upper end of the extension rod A27 is fixedly connected (adopting a threaded connection method) to the lower end of the inner sleeve A25.

[0077] The inner sealing cover A28 is in a conical ring shape and is fixedly installed on the lower outer wall of the extension rod A27. It is used to open or close the discharge port A212 at the bottom of the tank body A21. The operation of opening or closing the discharge port A212 at the bottom of the tank body A21 is as follows: Twist the operation section of the lead screw A22 to make the nut A26 move along the guide rib 261 of the outer sleeve A26 (it can also be said to move along the lead screw A22). Then, drive the inner sealing cover A28 to move through the inner sleeve A25 and the extension rod A27, so that the inner sealing cover A28 fits or disengages from the discharge port A212 of the tank body A21. When the inner sealing cover A28 fits the discharge port A212 of the tank body A21, the discharge port A212 is closed. When the inner sealing cover A28 disengages from the discharge port A212 of the tank body A21, the discharge port A212 is opened.

[0078] The outer protective cover includes an upper pressing plate 215, an upper seat body 292, a lower seat body 293, an L-shaped rocker 294 and a spring 295. The upper seat body 292 includes an upper sealing plate 2921, a corner connecting plate 2922 and a lower adsorption plate 2923 which are fixedly connected in sequence from top to bottom. The upper end surface of the upper sealing plate 2921 is used to fit or separate from the upper pressing plate 215 of the storage tank, thereby opening or closing the discharge port A212 of the storage tank. A circular boss X2924 for accommodating the spring 295 is provided in the central area of the lower end surface of the upper sealing plate 2921. A plurality of corner connecting plates 2922 are annularly and evenly distributed between the upper sealing plate 2921 and the lower adsorption plate 2923 around the circular boss X2924. The upper end of the corner connecting plate 2922 is welded to the lower end surface of the upper sealing plate 2921, and the lower end of the corner connecting plate 2922 is welded to the upper end surface of the lower adsorption plate 2923. A central hole A for the lower seat body to pass through is provided at the center of the lower adsorption plate 2923. The lower seat body 293 includes a lower pushing plate 2931 and an upper annular plate 2932 which are fixedly connected in sequence from bottom to top. A circular boss Y2933 for accommodating the spring is provided in the central area of the upper end surface of the lower pushing plate 2931. A plurality of guiding grooves X are annularly and evenly distributed on the upper end surface of the lower pushing plate 2931 around the circular boss Y2933. The upper annular plate 2932 is arranged at the upper end of the circular boss Y2933 and extends radially outward of the circular boss Y2933. An annular open area 2934 is provided between the outer side of the circular boss Y2933, the lower end of the upper annular plate 2932 and the upper end of the lower pushing plate 2931 of the lower seat body 293. The lower seat body 293 is movably inserted into the lower open end of the circular boss X2924 of the upper seat body 292 through the upper open end of the circular boss Y2933, so that the inside of the circular boss X2924 of the upper seat body 292 is communicated with the circular boss Y2933 of the lower seat body 293 to form a spring placement cavity 2935. The upper end of the L-shaped rocker 294 is provided with a hook portion 2941, the lower end is provided with a roller A2942, and the middle is provided with a turning portion 2943. The turning portion of the L-shaped rocker 294 is hinged to the lower end of the corner connecting plate 2922. The roller A2942 of the L-shaped rocker 294 is limited in the annular open area 2934, and the lower end of the roller A2942 is embedded in the guiding groove X. The spring 295 is compressively arranged in the spring placement cavity 2935. It forces the lower seat body 293 to move away from the upper seat body 292 through its elastic force, thereby driving the L-shaped rocker 294 to rotate clockwise around its hinge to the inner side of the storage tank, so that the hook portion 2941 of the L-shaped rocker 294 hooks the upper end surface of the upper pressing plate 215 of the storage tank. When an external force pushes the lower seat body 293 to move towards the upper seat body 292, it drives the L-shaped rocker 294 to rotate counterclockwise around its hinge to the outer side of the storage tank, so that the hook portion 2941 of the L-shaped rocker 294 disengages from the upper end surface of the upper pressing plate 215 of the storage tank.

[0079] The transfer tank includes a tank body B31, an upper sealing cover 32, a lead screw B33, a nut B34, an operation panel B35, an inner sleeve B36, an outer sleeve B37, an extension rod B38, an inner sealing cover B39 and a vibration motor 30. The lower end of the tank body B31 is provided with a guiding section 314, which is a regular quadrangular prism with an arc transition at the edge. The interior of the tank body B31 is provided with an inner cavity B311 for containing UO2 powder material. The bottom of the tank body B31 is provided with a discharge port B312 communicating with the inner cavity B311, and only one feed port 313 is provided at the top of the tank body B31. The upper sealing cover 32 is detachably installed on the feed port 313. The lead screw B33 is movably installed in the inner cavity B311 of the tank body B31, and its axis is arranged coincident with the center line of the tank body B31. The lead screw B33 is successively provided with an operation section, a smooth rod section and a threaded rod section from top to bottom. The operation section of the lead screw B33 extends out of the upper end of the tank body B31, and the lead screw B33 is rotatably connected to the tank body B31 through a tapered roller bearing on the smooth rod section. The nut B34 is threadedly connected to the threaded rod section of the lead screw B33, and the nut B34 is provided with a guiding groove B on its outer side wall. The operation panel B35 is fixedly installed on the operation section of the lead screw B33, and is provided with a plurality of jacks B351 arranged in a ring around the lead screw B33. The inner sleeve B36 is fixedly connected to the nut B34 and encloses the threaded rod section of the lead screw B33. The outer sleeve B37 is sleeved outside the inner sleeve B36, and is provided with a guiding strip 371 on its inner side. It is fixedly installed on the tank body B31 on the outer side, and is slidably matched with the guiding groove B of the nut B34 through the guiding strip 371 on the inner side. The upper end of the extension rod B38 is fixedly connected to the lower end of the inner sleeve B36. The inner sealing cover B39 is in a conical ring shape and is fixedly installed at the lower end of the extension rod B38, and is used to open or close the discharge port B312 at the bottom of the tank body B31. The vibration motor 30 is fixedly installed on the upper side wall of the tank body B31. The operation of opening or closing the discharge port B312 is as follows: Twist the operation section of the lead screw B33 to make the nut B34 move along the guiding strip 371 of the outer sleeve B37 (it can also be said to move along the lead screw B33), and then drive the inner sealing cover B39 to move through the inner sleeve B36 and the extension rod B38, so that the inner sealing cover B39 fits or disengages from the discharge port B312 of the tank body B31. When the inner sealing cover A28 fits the discharge port B312 of the tank body B31, the discharge port B312 is closed. When the inner sealing cover A28 disengages from the discharge port B312 of the tank body B31, the discharge port B312 is opened.

[0080] The transfer tank rotating device is fixedly arranged directly below the overhead sliding table 14. The transfer tank rotating device includes a lower base 411, a rotary drive motor A412, an upper turntable 413, a limit frame 414 and a first guide roller 415. The lower base 411 is directly or indirectly fixedly installed on the ground of the first floor space 11. The rotary drive motor A412 is fixedly installed on the lower base 411. The upper turntable 413 is fixedly installed at the upper end of the rotary drive motor A412 and rotates horizontally under the drive of the rotary drive motor A412. A plurality of rollers arranged parallel and horizontally are provided at the upper end of the upper turntable 413. The rollers are arranged in three parallel columns at the upper end of the upper turntable 413. The middle column of rollers is a non-electrically driven roller, and the two columns of rollers on both sides are electrically driven rollers. A rolling conveying surface A is formed above all the rollers. One end of the rolling conveying surface A in the conveying direction is an inlet / outlet A416 (the inlet / outlet A416 allows the transfer tank to enter or exit the rolling conveying surface A). The limit frame 414 is fixedly installed on the upper turntable 413 and is located at the other end of the rolling conveying surface A in the conveying direction. A limit electromagnet 4141 is embedded and installed on the limit frame 414. Two columns of first guide rollers 415 are vertically arranged and rotatably installed on the upper turntable 413 and are located on both sides of the rolling conveying surface A in the conveying direction. Each column of first guide rollers 415 is composed of a plurality of first guide rollers 415 vertically arranged and arranged in a horizontal row. The two columns of first guide rollers 415 and the limit frame 414 enclose an installation station A417. When the transfer tank enters the rolling conveying surface A through the inlet / outlet A416, the two columns of first guide rollers 415 respectively contact two surfaces on the guide section 314 of the transfer tank, and the limit electromagnet 4141 on the limit frame 414 is used to adsorb one surface on the guide section 314 of the transfer tank, so as to limit the transfer tank in the installation station A417. When the transfer tank rotating device drives the transfer tank placed in the installation station A417 to rotate, there are a first docking position and a second docking position in the rotation path of the upper sealing cover 32 of the transfer tank.

[0081] The storage tank translation trolley can be movably installed on the horizontal track A15. The storage tank translation trolley includes a vehicle body A421 and an electric push rod A425. The lower end of the vehicle body A421 is provided with rollers B422, and the upper end of the vehicle body A421 is provided with a plurality of guide rollers arranged horizontally. All the guide rollers jointly enclose a plurality of square-shaped areas, and each square-shaped area is an installation station B423. The vehicle body A421 is provided with a blanking hole A424 in each installation station B423. The vehicle body A421 is rollingly installed on the horizontal track A15 through the rollers B422. The cylinder body of the electric push rod A425 is fixedly installed on the horizontal track A15, and the piston rod of the electric push rod A425 is fixedly connected to the vehicle body A421. When the piston rod of the electric push rod A425 extends and retracts, it drives the vehicle body A421 to make a horizontal reciprocating linear movement along the horizontal track A15. When the storage tank is placed in any installation station B423 of the storage tank translation trolley, the discharge port A212 of the storage tank faces the blanking hole A424 in this installation station B423. When the storage tank is placed in the target installation station B423 on the storage tank translation trolley, the guide rollers on the four sides of the target installation station B423 are in contact with the four legs 214 at the lower end of the storage tank to correct the deviation and adjust the posture of the storage tank, so as to limit the storage tank in the installation station B423. When the storage tank translation trolley moves with the storage tank placed in the installation station B423, there are a third docking position, a fourth docking position, and a fifth docking position in the moving path of the storage tank.

[0082] The device for disassembling and assembling the outer cover of the storage tank is used to disassemble and assemble the outer protective cover of the storage tank. The device for disassembling and assembling the outer cover of the storage tank includes an electric push rod B431, a bracket 432, an annular electromagnet 433 and a traction electromagnet 434. The cylinder body of the electric push rod B431 is directly or indirectly fixedly installed on the ground of the first floor space 11, and the piston rod of the electric push rod B431 extends vertically upward. The bracket 432 is directly or indirectly fixedly connected to the piston rod of the electric push rod B431. A central hole B4321 is provided at the top thereof, and an electromagnet placement cavity 4322 communicating with the central hole B4321 is provided therein. The annular electromagnet 433 is fixedly installed at the upper end of the bracket 432. A central hole C4331 is provided at the center thereof, and the central hole B4321 of the bracket 432 is enclosed therein through the central hole C4331. The lower end of the traction electromagnet 434 is fixedly installed in the electromagnet placement cavity 4322 of the bracket 432, and the upper end extends out from the central hole B4321 of the bracket 432 and is located in the central hole C4331 of the annular electromagnet 433. The upper end of the traction electromagnet 434 moves in a reciprocating linear motion in the vertical direction, so as to extend to the upper end of the annular electromagnet 433 or retract into the central hole C4331 of the annular electromagnet 433. When the storage tank with the outer protective cover moves to the fourth docking position, and the device for disassembling and assembling the outer cover of the storage tank does not adsorb the outer protective cover, the lower adsorption plate 2923 of the outer protective cover is located directly above the annular electromagnet 433, and the lower push plate 2931 of the outer protective cover is located directly above the traction electromagnet 434, so as to facilitate the device for disassembling and assembling the outer cover of the storage tank to disassemble the outer protective cover of the storage tank. When the storage tank without the outer protective cover moves to the fourth docking position, and the device for disassembling and assembling the outer cover of the storage tank adsorbs the outer protective cover, the lower adsorption plate 2923 of the outer protective cover is magnetically attracted to the annular electromagnet 433, the lower push plate 2931 of the outer protective cover is magnetically attracted to the traction electromagnet 434, and the upper sealing plate 2921 of the outer protective cover is located directly below the upper pressing plate 215 of the storage tank, so as to facilitate the device for disassembling and assembling the outer cover of the storage tank to install the outer protective cover of the storage tank.

[0083] The inner cover opening and closing device of the storage tank is used to control the fitting or separation of the inner sealing cover A28 of the storage tank and the discharge port A212, so as to open or close the discharge port A212 of the storage tank. The inner cover opening and closing device of the storage tank includes a gantry A441, a lifting drive device A442, a rotary drive motor B443 and a docking plate 444. The gantry A441 is directly or indirectly fixedly installed on the overhead slide 14. The lifting drive device A442 is fixedly installed on the gantry A441. The rotary drive motor B443 is fixedly installed on the lifting drive device A442 and is driven by the lifting drive device A442 to make vertical lifting movements. The docking plate 441 is fixedly connected to the lower end of the rotary drive motor B443 and is driven by the rotary drive motor B443 to make horizontal rotations. A plurality of finger rods 4441 for inserting into the jacks A241 of the operation panel A24 of the storage tank are provided at the lower end of the docking plate 444. When the storage tank moves to the third docking position, the operation panel A24 of the storage tank is located directly below the docking plate 444 of the inner cover opening and closing device of the storage tank, so as to facilitate the inner cover opening and closing device of the storage tank to open or close the discharge port A212 of the storage tank.

[0084] The upper cover disassembly and assembly device of the transfer tank is used to disassemble and assemble the upper sealing cover 32 of the transfer tank. The upper cover disassembly and assembly device of the transfer tank includes a lifting drive device B451, a first extension rod 452 and an electromagnetic chuck 453. The lifting drive device B451 is directly or indirectly fixedly installed on the overhead slide 14. The upper end of the first extension rod 452 is fixedly connected to the lifting drive device B451 and is driven by the lifting drive device B451 to make vertical lifting movements. The electromagnetic chuck 453 is fixedly connected to the lower end of the first extension rod 452. When the transfer tank rotates to the first docking position, the upper sealing cover 32 of the transfer tank is located directly below the electromagnetic chuck 453 of the upper cover disassembly and assembly device of the transfer tank, so as to facilitate the upper cover disassembly and assembly device of the transfer tank to disassemble or assemble the upper sealing cover 32 of the transfer tank.

[0085] The lower pipeline docking device is used to dock the storage tank and the transfer tank. The lower pipeline docking device includes a bracket A461, a middle pipeline 462, an upper movable pipeline 463, a lower movable pipeline 464, a linear motor A465, a linear motor B466, a connecting rod A467 and a connecting rod B468. The bracket A461 is fixedly installed on the overhead slide 14. The middle pipeline 462 is fixedly installed on the bracket A461. The upper movable pipeline 463 and the lower movable pipeline 464 are respectively movably inserted into the inner wall of the upper end and the outer wall of the lower end of the middle pipeline 462, and respectively extend out from the upper port and the lower port of the middle pipeline 462. Two relatively arranged third hinge parts are provided on the outer wall of the upper end of the upper movable pipeline 463, and two relatively arranged fourth hinge parts are provided on the outer wall of the lower end of the lower movable pipeline 464. The linear motor A465 includes a base A4651, a guide rail A4652 and a slider A4653. The base A4651 is fixedly installed at the upper end of the bracket A461. The guide rail A4652 is horizontally installed on the base A4651. The slider A4653 is slidably installed on the guide rail A4652. The number of the linear motors A465 is two, and the two linear motors A465 are symmetrically arranged with respect to the middle pipeline 462. The linear motor B466 includes a base B4661, a guide rail B4662 and a slider B4663. The base B4661 is fixedly installed at the lower end of the bracket A461. The guide rail B4662 is horizontally installed on the base B4661. The slider B4663 is slidably installed on the guide rail B4662. The number of the linear motors B466 is two, and the two linear motors B466 are symmetrically arranged with respect to the middle pipeline 462. The two connecting rods A467 are distributed on both sides of the middle pipeline 462. One ends of the two connecting rods A467 are respectively hinged to the sliders A4653 of the two linear motors A465, and the other ends of the two connecting rods A467 are respectively hinged to the two third hinge parts of the upper movable pipeline 463. The two connecting rods B468 are distributed on both sides of the middle pipeline 462. One ends of the two connecting rods B468 are respectively hinged to the sliders B4663 of the two linear motors B466, and the other ends of the two connecting rods B468 are respectively hinged to the two fourth hinge parts of the lower movable pipeline 464. When the transfer tank rotates to the second docking position, the feed port 313 of the transfer tank is located directly below the lower movable pipeline 464 of the lower pipeline docking device, so as to facilitate the lower pipeline docking device to dock the transfer tank. When the storage tank moves to the fifth docking position, the discharge port A212 of the storage tank is located directly above the upper movable pipeline 463 of the lower pipeline docking device, so as to facilitate the lower pipeline docking device to dock the storage tank.

[0086] The negative pressure dust removal device includes a filtering unit 471, a main pipe 472, branch pipes 473, a flexible hose 474 and a negative pressure fan 475. A plurality of filtering units 471 and a feed inlet 313 are annularly and evenly distributed on the top of the tank body B31 of the transfer tank. A filter element for filtering radioactive dust is provided in the filtering unit 471. The two ends of the filtering unit 471 are respectively an air inlet end and an air outlet end, and the air inlet end of the filtering unit 471 extends into the inner cavity B311 of the transfer tank. The main pipe 472 is provided with a main air outlet and a plurality of air inlets, and the number of the air inlets is the same as that of the filtering units 471. A ball valve for controlling the on-off of air flow is provided on the main air outlet. The number of the branch pipes 473 is the same as that of the filtering units 471 and corresponds to the filtering units 471 one by one. One end of the branch pipe 473 is communicated with the air outlet end of the corresponding filtering unit 471, and the other end of the branch pipe 473 is communicated with the corresponding air inlet on the main pipe 472. One end of the flexible hose 474 is detachably connected to the main air outlet of the main pipe 472 through a quick pipe joint, and the other end is detachably connected to the air inlet end of the negative pressure fan 475. The air outlet end of the negative pressure fan 475 is communicated with the atmosphere.

[0087] The transfer tank translation trolley can be movably installed on the horizontal track B17. The transfer tank translation trolley includes a vehicle body B511 and a limit component. At the lower end of the vehicle body B511, there are driving wheels B512 (the driving wheels B512 are driven to rotate by a motor). At the upper end of the vehicle body B511, there are multiple rollers arranged parallel to each other and horizontally. The rollers are arranged in four parallel columns above the vehicle body B511. The two middle columns of rollers are non-electrically driven rollers, and the two columns of rollers on both sides are electrically driven rollers. A rolling conveying surface B is formed above all the rollers. One end of the rolling conveying surface B in the conveying direction is an inlet / outlet B513 (the inlet / outlet B513 allows the transfer tank to enter or exit the rolling conveying surface B). A first avoidance area and a second avoidance area are formed between the two middle columns of rollers. The first avoidance area and the second avoidance area are respectively located at both ends of the rolling conveying surface B in the conveying direction. The first avoidance area is relatively close to the inlet / outlet B513. At the center of the upper end of the vehicle body B511, there is a vacant area not covered by the rollers, and a blanking hole B514 is provided in the vehicle body B511 in the vacant area. The limit component includes second guide rollers 515, a front limit plate 516, a front air cylinder 517, a rear limit plate 518, and a rear air cylinder 519. Two columns of second guide rollers 515 are vertically arranged and rotatably installed on the vehicle body B511 and are located on both sides of the rolling conveying surface B in the conveying direction. Each column of second guide rollers 515 is composed of multiple second guide rollers 515 vertically arranged and horizontally arranged in a row. The lower side edge of the front limit plate 516 is hinged above the vehicle body B511 and is located in the first avoidance area. The cylinder body of the front air cylinder 517 is hinged above the vehicle body B511 and is located in the first avoidance area. The piston rod of the front air cylinder 517 is hinged to the front limit plate 516. The piston rod of the front air cylinder 517 expands and contracts to drive the front limit plate 516 to rotate around its lower side edge, so that the front limit plate 516 extends above the rolling conveying surface B or retracts below the rolling conveying surface B. The lower side edge of the rear limit plate 518 is hinged above the vehicle body B511 and is located in the second avoidance area. The cylinder body of the rear air cylinder 519 is hinged above the vehicle body B511 and is located in the second avoidance area. The piston rod of the rear air cylinder 519 is hinged to the rear limit plate 518. The piston rod of the rear air cylinder 519 expands and contracts to drive the rear limit plate 518 to rotate around its lower side edge, so that the rear limit plate 518 extends above the rolling conveying surface B or retracts below the rolling conveying surface B. The two columns of second guide rollers 515, the front limit plate 516, and the rear limit plate 518 surround and form an installation station C510. The vehicle body B511 of the transfer tank translation trolley is rollingly installed on the horizontal track B17 through the driving wheels B512 and makes a reciprocating linear movement along the horizontal track B17. The control of the moving stroke and the position of the transfer tank translation trolley can be achieved by adjusting the operating parameters of the motor connected to the driving wheels B512, or by setting a laser distance sensor or a travel switch.When the transfer tank enters the rolling conveying surface B through the inlet and outlet B513, two rows of second guide rollers 515 are respectively in contact with two surfaces on the guiding section 314 of the transfer tank, and the front limiting plate 516 extending above the rolling conveying surface B and the rear limiting plate 518 extending above the rolling conveying surface B are respectively abutted against the other two surfaces on the guiding section 314 of the transfer tank, so as to limit the transfer tank in the placement station C510. When the transfer tank is limited in the placement station C510, the discharge port B312 of the transfer tank is directly opposite to the material dropping hole B514. There are a transfer position and a feeding position in the moving path of the transfer tank translation trolley. When the transfer tank translation trolley is at the transfer position, the inlet and outlet B513 of the transfer tank translation trolley is directly or indirectly communicated with the upper opening 182 of the transfer elevator 18 to realize the two-way transfer of the transfer tank. When the transfer tank translation trolley is at the feeding position, the transfer tank placed in the placement station C510 is docked with the transfer silo through the upper pipeline docking device.

[0088] The upper pipeline docking device is used to dock the transfer tank and the transfer silo 16. The upper pipeline docking device includes a lifting drive device C521, a docking pipe 522, a bracket C523, a rotary drive motor D524, a second extension rod 525 and a cover plate 526. The lifting drive device C521 is fixedly installed on the ground of the third-layer space 13 and is fixedly connected to the vertically arranged docking pipe 522, and is used to drive the docking pipe 522 to make vertical lifting movement. The lower end of the docking pipe 522 passes through the ground of the third-layer space 13 and enters the second-layer space 12, and the upper end of the docking pipe 522 extends out in the third-layer space 13. In the vertical lifting movement stroke of the docking pipe 522, there are an upper limit position and a lower limit position from top to bottom in sequence. In the vertical lifting movement stroke of the docking pipe 522, the lower port of the docking pipe 522 always extends into the feeding port of the transfer silo 16. The bracket C523 is fixedly installed on the floor of the third-layer space 13. The rotary drive motor D524 is fixedly installed on the bracket C523, and its machine shaft horizontally extends and is fixedly connected to the front end of the second extension rod 525. The cover plate 526 is fixedly connected to the rear end of the second extension rod 525, and rotates under the drive of the rotary drive motor D524, and then shields or opens the upper port of the docking pipe 522 at the lower limit position. When the transfer tank placed in the placement station C510 moves to the feeding position along with the transfer tank translation trolley, the docking pipe 522 vertically rises to the upper limit position, that is, the upper port of the docking pipe 522 passes through the material dropping hole B514 of the transfer tank translation trolley and is docked with the discharge port B312 of the transfer tank. The docking pipe 522 vertically descends to the lower limit position, that is, the upper port of the docking pipe 522 withdraws from the material dropping hole B514 of the transfer tank translation trolley and is separated from the discharge port B312 of the transfer tank.

[0089] The inner cover opening and closing device of the transfer tank is fixedly arranged on the transfer trolley of the transfer tank, and is used to control the inner sealing cover B39 of the transfer tank to fit or separate from the discharge port B312, so as to open or close the discharge port B312 of the transfer tank. The inner cover opening and closing device of the transfer tank includes a gantry B531, a lifting drive device C532, a rotary drive motor C533 and a plugging disc 534. The gantry B531 is directly or indirectly fixedly installed on the vehicle body B511 of the transfer trolley of the transfer tank. The lifting drive device C532 is fixedly installed on the gantry B531 and is fixedly connected to the rotary drive motor C533, and is used to drive the rotary drive motor C533 to make vertical lifting movements. The shaft of the rotary drive motor C533 extends vertically downward. The plugging disc 534 is fixedly connected to the shaft of the rotary drive motor C533 and is driven by the rotary drive motor C533 to make horizontal rotations. A plug rod 5341 for inserting into the jack B of the operation panel B of the transfer tank is provided at the lower end of the plugging disc 534. When the transfer tank is limited in the placement station C510, the operation panel B35 of the transfer tank is located directly below the plugging disc 534 of the inner cover opening and closing device of the transfer tank, so as to facilitate the inner cover opening and closing device of the transfer tank to open or close the discharge port B312 of the transfer tank.

[0090] Preferably, a plurality of cameras (not shown in the figure) are provided in the third floor 13 of the factory building, providing visual support and visual monitoring for the automatic feeding operation of the third floor 13 of the factory building.

[0091] Preferably, a sealing ring is provided between the discharge port A212 of the tank body A21 and the inner sealing cover A28 to prevent radioactive materials from leaking through the gaps.

[0092] Preferably, the upper sealing cover 32 is an inverted conical cover with a large upper part and a small lower part. On the one hand, it realizes self-centering during closing, and on the other hand, it reduces the docking accuracy.

[0093] Preferably, a sealing ring is provided between the discharge port B312 of the tank body B31 and the inner sealing cover B39 to prevent radioactive materials from leaking through the gaps.

[0094] Preferably, the volume of the inner cavity B311 of the transfer tank is 4 to 6 times that of the inner cavity A211 of the storage tank.

[0095] Preferably, an outwardly expanding first conical section is provided at the upper port of the upper movable pipe 463. When the upper movable pipe 463 is docked with the discharge port A212 of the storage tank, the upper port of the upper movable pipe 463 encloses the discharge port A212 of the storage tank.

[0096] Preferably, a reduced-opening second conical section is provided at the lower port of the lower movable pipe 464. When the lower movable pipe 464 is docked with the feed port 313 of the transfer tank, the lower port of the lower movable pipe 464 is inserted into the feed port 313 of the transfer tank.

[0097] Preferably, the number of the disassembly and assembly devices for the outer cover of the storage tank is the same as the number of the placement stations B423 on the storage tank translation trolley.

[0098] Preferably, an outwardly expanding third conical section is provided at the upper port of the docking pipe 522. When the docking pipe 522 is docked with the discharge port B312 of the transfer tank, the upper port of the docking pipe 522 encloses the discharge port B312 of the storage tank.

[0099] Preferably, it further includes a first conveyor belt 100, a second conveyor belt 200, and a third conveyor belt 300. The first conveyor belt 100 is arranged between the placement station A417 of the transfer tank rotating device and the lower open end 181 of the transfer elevator 18, and is used for two-way transmission of the transfer tank between the placement station A417 and the lower open end 181. The second conveyor belt 200 is arranged between the placement station C510 of the transfer tank translation trolley and the upper open end 182 of the transfer elevator 18, and is used for two-way transmission of the transfer tank between the placement station C510 and the upper open end. The third conveyor belt 300 is arranged adjacent to the transfer tank rotating device and is used for transferring the transfer tank to the placement station A417 of the transfer tank rotating device. Embodiment 2

[0100] As Figure 26 shown, compared with Embodiment 1, this embodiment is only different in the structures of the transfer tank and the negative pressure dust removal device, which are specifically described as follows.

[0101] The transfer tank includes a tank body B31, an upper sealing cover 32, a lead screw B33, a nut B34, an operation panel B35, an inner sleeve B36, an outer sleeve B37, an extension rod B38, and an inner sealing cover B39. A guiding section 314 is provided at the lower end of the tank body B31. The guiding section 314 is a regular quadrangular prism with an arc transition at the edge. An inner cavity B311 for containing UO2 powder material is provided inside the tank body B31. A discharge port B312 communicating with the inner cavity B311 is provided at the bottom of the tank body B31. Three feed ports 313 are provided at the top of the tank body B31 and are evenly distributed in a ring around the center line of the tank body B31. Three upper sealing covers 32 are respectively detachably installed on the three feed ports 313. The lead screw B33 is movably installed in the inner cavity B311 of the tank body B31, and its axis coincides with the center line of the tank body B31. The lead screw B33 is successively provided with an operation section, a smooth rod section, and a threaded rod section from top to bottom. The operation section of the lead screw B33 extends out of the upper end of the tank body B31, and the lead screw B33 is rotatably connected to the tank body B31 through a tapered roller bearing at the smooth rod section. The nut B34 is threadedly connected to the threaded rod section of the lead screw B33, and a guiding groove B is provided on the outer side wall surface of the nut B34. The operation panel B35 is fixedly installed on the operation section of the lead screw B33, and a plurality of jacks B351 evenly distributed in a ring around the lead screw B33 are provided thereon. The inner sleeve B36 is fixedly connected to the nut B34 and encloses the threaded rod section of the lead screw B33. The outer sleeve B37 is sleeved outside the inner sleeve B36. A guiding strip 371 is provided on its inner side, and it is fixedly installed on the tank body B31 on the outer side. It is slidably matched with the guiding groove B of the nut B34 through the guiding strip 371 on the inner side. The upper end of the extension rod B38 is fixedly connected to the lower end of the inner sleeve B36. The inner sealing cover B39 is in a conical ring shape and is fixedly installed at the lower end of the extension rod B38, and it is used to open or close the discharge port B312 at the bottom of the tank body B31. The operation of opening or closing the discharge port B312 at the bottom of the tank body B31 is as follows: Rotate the operation section of the lead screw B33 to make the nut B34 move along the guiding strip 371 of the outer sleeve B37 (or it can be said to move along the lead screw B33), and then drive the inner sealing cover B39 to move through the inner sleeve B36 and the extension rod B38, so that the inner sealing cover B39 fits or separates from the discharge port B312 of the tank body B31. When the inner sealing cover A28 fits the discharge port B312 of the tank body B31, the discharge port B312 is closed. When the inner sealing cover A28 separates from the discharge port B312 of the tank body B31, the discharge port B312 is opened.

[0102] The negative pressure dust removal device includes a filtering unit 471, a main pipe 472, branch pipes 473, a flexible hose 474, and a negative pressure fan 475. A plurality of filtering units 471 are evenly distributed in a circular pattern on the top of the tank body B31 of the transfer tank. A filter element for filtering radioactive dust is provided inside the filtering unit 471. The two ends of the filtering unit 471 are respectively an air inlet end and an air outlet end, and the air inlet end of the filtering unit 471 extends into the inner cavity B311 of the transfer tank. The number of filtering units 471 is the same as the number of the feed ports 313 of the transfer tank, and a filtering unit 471 is arranged at the middle position between every two adjacent feed ports 313 on the transfer tank. The main pipe 472 is provided with a main air outlet and a plurality of air inlets, the number of the air inlets is the same as the number of the filtering units 471, and a ball valve for controlling the on-off of the air flow is provided on the main air outlet. The number of the branch pipes 473 is the same as the number of the filtering units 471 and they correspond to the filtering units 471 one by one. One end of the branch pipe 473 is communicated with the air outlet end of the corresponding filtering unit 471, and the other end of the branch pipe 473 is communicated with the corresponding air inlet on the main pipe 472. One end of the flexible hose 474 is detachably connected to the main air outlet of the main pipe 472 through a quick pipe joint, and the other end is detachably connected to the air inlet end of the negative pressure fan. The air outlet end of the negative pressure fan 475 is communicated with the atmosphere.

[0103] This invention is used for the automatic feeding operation of UO2 powder material before the start of the uranium conversion process in the nuclear fuel preparation process. Before feeding, each component in this invention is in the initial state. In the initial state:

[0104] a. The inner sealing cover A28 of the storage tank fits against the discharge port A212 of the storage tank to close the discharge port A212, and the outer protective cover of the storage tank is installed outside the discharge port A212 of the storage tank;

[0105] b. The inner sealing cover A28 of the transfer tank fits against the discharge port B312 to close the discharge port B312;

[0106] c. The electric push rod B431 and the traction electromagnet 434 in the outer cover disassembly and assembly device of the storage tank respectively move to the lower limit position to avoid interference with the storage tank;

[0107] d. The docking plate 444 in the inner cover opening and closing device of the storage tank is at the upper end of its moving stroke to avoid interference with the storage tank on the storage tank translation trolley;

[0108] e. The electromagnetic chuck 453 in the upper cover disassembly and assembly device of the transfer tank is at the upper end of its moving stroke to avoid interference with the transfer tank on the transfer tank rotating device;

[0109] f. The upper movable pipe 463 in the lower pipe docking device is at the lower end of its moving stroke to avoid interference with the storage tank translation trolley, and the lower movable pipe 464 is at the upper end of its moving stroke to avoid interference with the transfer tank on the transfer tank rotating device;

[0110] g. The ball valve in the negative pressure dust removal device is in the closed state;

[0111] h. The transfer tank translation trolley moves to the tank transfer position to prepare for receiving the transfer tank; the front limit plate 516 and the rear limit plate 518 on the transfer tank translation trolley are both retracted below the rolling conveying surface B;

[0112] i. The docking pipe 522 in the upper pipe docking device is in the lower limit position to avoid interference with the transfer tank translation trolley; the cover plate 526 covers the upper port of the docking pipe 522 in the lower limit position;

[0113] j. The plug-in disk 534 in the transfer tank inner cover opening and closing device is at the upper end of its moving stroke to avoid interference with the transfer tank on the transfer tank translation trolley.

[0114] The feeding operation of Embodiment 2 is as follows:

[0115] S01. Place the storage tank and the transfer tank respectively:

[0116] a. Operate the cantilever crane to lift and place a group of storage tanks into the placement station B423 of the storage tank translation trolley respectively. One storage tank is placed in each placement station B423. During the process of lifting the storage tank to the placement station B423, the guide rollers on the four sides of the placement station B423 guide, correct the deviation and center the storage tank;

[0117] b. Operate the cantilever crane to lift a transfer tank onto the third conveyor belt 300. The rotation drive motor A412 of the transfer tank rotating device is started to drive the upper turntable 413 to rotate, so that the inlet and outlet A416 of the transfer tank rotating device faces the third conveyor belt 300;

[0118] c. The third conveyor belt 300 is started to drive the transfer tank placed thereon to move in the direction close to the inlet and outlet A416 of the transfer tank rotating device. After the transfer tank enters the rolling conveying surface A through the inlet and outlet A416, the roller drives the transfer tank to move in the direction close to the limit frame 414. During the movement, the two rows of first guide rollers 415 are respectively in contact with the two surfaces on the guide section 314 of the transfer tank, playing a role in limiting the movement path of the transfer tank. After the transfer tank is adsorbed by the limit electromagnet 4141 on the limit frame 414, the transfer tank is locked in the placement station A417 of the transfer tank rotating device.

[0119] S02. Remove the outer protective cover of the storage tank:

[0120] a. The storage tank translation trolley drives the target storage tank to move to the fourth docking position, so that the lower adsorption plate 2923 of the outer protective cover is located directly above the annular electromagnet 433, and the lower push plate 2931 of the outer protective cover is located directly above the traction electromagnet 434;

[0121] b. The electric push rod B431 of the storage tank outer cover disassembly and assembly device rises, driving the annular electromagnet 433 to move upward. When the annular electromagnet 433 contacts the lower adsorption plate 2923, the annular electromagnet 435 is energized to attract the lower adsorption plate 2923; then, the traction electromagnet 434 rises. After contacting the lower push plate 2931, it overcomes the elastic force of the spring 295 and pushes the lower push plate 2931 upward, driving the L-shaped rocker 294 to rotate outward (counterclockwise) around its hinge point with respect to the storage tank, so that the hook portion 2941 of the L-shaped rocker 294 disengages from the upper end surface of the upper pressure plate 215, thereby unlocking the outer protective cover from the target storage tank;

[0122] c. The traction electromagnet 434 of the storage tank outer cover disassembly and assembly device is energized to attract the lower push plate 2931, so that the L-shaped rocker 294 maintains its current pose. Then, the electric push rod B431 descends, driving the outer protective cover to move downward, so that the outer protective cover completely disengages from the target storage tank;

[0123] d. Repeat steps a to c to sequentially remove the outer protective covers of the storage tanks at all placement stations B on the storage tank translation trolley.

[0124] S03. Multiple storage tanks are sequentially fed into the intermediate tank:

[0125] a. The rotation drive motor A412 in the intermediate tank rotation device is started, driving the intermediate tank placed at the placement station A417 to rotate to the first docking position, so that the upper sealing cover 32 of the intermediate tank is located directly below the electromagnetic chuck 453 of the intermediate tank upper cover disassembly and assembly device;

[0126] b. The storage tank translation trolley drives the target storage tank to move to the fifth docking position, so that the discharge port A212 of the storage tank is located directly above the upper movable pipe 463 of the lower pipeline docking device;

[0127] c. The lifting drive device B451 of the intermediate tank upper cover disassembly and assembly device descends, driving the electromagnetic chuck 453 to descend. When the electromagnetic chuck 453 contacts the target upper sealing cover 32 of the intermediate tank, the electromagnetic chuck 453 is energized to attract the target upper sealing cover 32; then, the lifting drive device B451 rises, driving the electromagnetic chuck 453 and the upper sealing cover 32 to move upward, thereby removing the target upper sealing cover 32 from the target feed port 313 of the intermediate tank, so that the target feed port 313 of the intermediate tank is exposed;

[0128] d. The rotation drive motor A412 of the transfer tank rotation device is started, driving the transfer tank placed at the placement station A417 to rotate to the second docking position, so that the target feed port 313 of the transfer tank is directly below the lower movable pipe 464 of the lower pipe docking device;

[0129] e. The two linear motors A465 of the lower pipe docking device act synchronously. Respectively through the transmission of the connecting rod A467, drive the upper movable pipe 463 to move upward, so that the upper port of the upper movable pipe 463 is docked with the discharge port A212 of the target storage tank; the two linear motors B466 of the lower pipe docking device act synchronously. Respectively through the transmission of the connecting rod B468, drive the lower movable pipe 464 to move downward, so that the lower port of the lower movable pipe 464 is docked with the target feed port 313 of the transfer tank;

[0130] f. The rotation drive motor B443 of the storage tank inner cover opening and closing device is started, driving the docking plate 444 to rotate a certain angle, so that the finger rod 4441 of the docking plate 444 is directly opposite to the jack A241 of the operation panel A24 of the target storage tank; at the same time, the lifting drive device A442 is started, driving the docking plate 444 to move downward, so that the finger rod 4441 of the docking plate 444 is inserted into the jack A241 of the operation panel A24 of the target storage tank; then, the rotation drive motor B443 of the storage tank inner cover opening and closing device is started, driving the docking plate 444 to rotate, driving the operation panel A24 and the lead screw A22 of the target storage tank to rotate, and then driving the nut A23 to move downward along the lead screw A22. The nut A23 drives the inner seal cover A28 to move downward through the inner sleeve A25 and the extension rod A27, so that the inner seal cover A28 is separated from the discharge port A212 of the target storage tank, thereby forming an annular gap for the powder material to fall; the powder material in the inner cavity A211 of the target storage tank immediately falls through the annular gap, and then successively passes through the upper movable pipe 463, the middle pipe 462, the lower movable pipe 464, and the target feed port 313 of the transfer tank and enters the inner cavity B311 of the transfer tank;

[0131] g. After the powder material in the target storage tank is completely discharged, the following three operations are carried out simultaneously: 1. The two linear motors A465 in the lower pipeline docking device act synchronously. Respectively through the transmission of the connecting rod A467, drive the upper movable pipeline 463 to move downward to avoid interfering with the subsequent movement of the storage tank translation trolley; 2. The two linear motors B466 in the lower pipeline docking device act synchronously. Respectively through the transmission of the connecting rod B468, drive the lower movable pipeline 464 to move upward to avoid interfering with the subsequent rotation of the transfer tank located on the transfer tank rotating device; 3. The rotation drive motor B443 in the storage tank inner cover opening and closing device is started to drive the docking disk 444 to rotate, drive the operation disk A24 and the lead screw A22 of the target storage tank to rotate, and then drive the nut A23 to move downward along the lead screw A22. The nut A23 drives the inner sealing cover A28 to move downward through the inner sleeve A25 and the extension rod A27, so that the inner sealing cover A28 fits and closes the discharge port A212 of the target storage tank. Then, the lifting drive device A442 is started to drive the docking disk 444 to move upward, so that the finger rod 4441 of the docking disk 444 exits the jack A241 of the operation disk A24 of the target storage tank;

[0132] h. The rotation drive motor A412 of the transfer tank rotating device is started to drive the transfer tank in the placement station A417 to rotate to the first docking position, so that the target feed port 313 of the transfer tank rotates to directly below the electromagnetic chuck 453 of the transfer tank upper cover disassembly and assembly device;

[0133] i. The lifting drive device B451 of the transfer tank upper cover disassembly and assembly device descends, driving the electromagnetic chuck 453 to descend, and inserts the target upper sealing cover 323 adsorbed on the electromagnetic chuck 453 into the target feed port 313 of the transfer tank; the electromagnetic chuck 453 is powered off to release the adsorption state with the target upper sealing cover 323; the lifting drive device B451 ascends, driving the electromagnetic chuck 453 to ascend to avoid interfering with the subsequent rotation of the transfer tank located on the transfer tank rotating device;

[0134] j. Repeat steps a - i to sequentially dock and feed the other storage tanks on the storage tank translation trolley with the transfer tank, and ensure that all the feed ports 313 on the transfer tank correspond one by one with all the storage tanks on the storage tank translation trolley (that is, each feed port 313 on the transfer tank is only allowed to be docked once).

[0135] In this step, during the process of the storage tank starting to discharge the powder material until the powder material in the storage tank is completely discharged (corresponding to sub-step f), the ball valve in the negative pressure dust removal device is opened, and the negative pressure fan 475 is started. The negative pressure is sequentially conducted to the filter unit 471 through the negative pressure fan 475, the hose 474, the main pipe 472, and the branch pipe 473. All the filter units 471 jointly suck the dust floating above the inner cavity B311 of the transfer tank. The dust is intercepted in the filter unit 471, and the filtered air is discharged into the external environment through the branch pipe 473, the main pipe 472, the hose 474, and the negative pressure fan 475 in sequence.

[0136] In this step, after all the storage tanks on the transfer trolley of the waiting tank are completed with feeding (corresponding to the end of sub-step f - before the start of sub-step g), first, the negative pressure fan 475 is turned off, then the ball valve at the total air outlet of the main pipe 472 is closed, and finally, the connection between the hose 474 and the total air outlet of the main pipe 472 is disconnected.

[0137] In this step, the rotating device of the transfer tank should avoid driving the transfer tank to always rotate in one direction, thereby preventing the hose from being wound around the transfer tank.

[0138] S04. Transfer the transfer tank to the transfer trolley of the transfer tank:

[0139] a. The rotary drive motor A412 of the rotating device of the transfer tank is started to drive the upper turntable 413 to rotate, so that the inlet and outlet A416 of the rotating device of the transfer tank are facing the first conveyor belt 100. Then, the limit electromagnet 4141 is powered off to release the locking state of the transfer tank in the placement station A417. Next, the transfer tank is driven by the rollers to move in the direction close to the inlet and outlet A416. During the movement, the two rows of first guide rollers 415 are respectively in contact with the two surfaces on the guiding section 314 of the transfer tank, playing a role in limiting the movement path of the transfer tank until the transfer tank is discharged from the inlet and outlet A416 to the outside of the rotating device of the transfer tank.

[0140] b. After the transfer tank is discharged to the outside of the rotating device of the transfer tank, it sequentially passes through the first conveyor belt 100, the transfer elevator 18, the second conveyor belt 200, and the inlet and outlet B517 of the transfer trolley of the transfer tank, and enters the rolling conveying surface B of the transfer trolley of the transfer tank.

[0141] c. The rollers on the transfer tank translation trolley start, driving the transfer tank to move to the central area of the rolling conveyor surface B. During the movement, the two rows of second guiding rollers 515 are respectively in contact with two surfaces on the guiding section 314 of the transfer tank, playing a role in restricting the movement path of the transfer tank. After the transfer tank moves to the central area of the rolling conveyor surface B, the rollers stop running, and the front cylinder 517 and the rear cylinder 519 are respectively started, driving the front limiting plate 516 and the rear limiting plate 518 to extend above the rolling conveyor surface B, so that the front limiting plate 516 and the rear limiting plate 518 respectively abut against the other two surfaces on the guiding section 314 of the transfer tank, thereby locking the transfer tank in the placement station C510 of the transfer tank translation trolley.

[0142] S05, feeding the transfer tank into the intermediate storage bin:

[0143] a. The rotation drive motor D524 of the upper pipeline docking device starts, driving the cover plate 526 to rotate through the second extension rod 525, opening the upper port of the docking pipe 522 in the lower limit position. The transfer tank translation trolley drives the transfer tank to move from the tank transfer position to the feeding position, so that the transfer tank and the upper pipeline docking device are vertically aligned. Then, the lifting drive device C521 of the upper pipeline docking device starts, driving the docking pipe 522 to rise from the lower limit position to the upper limit position, so that the discharge port B312 of the transfer tank is included in the upper port of the docking pipe 522. At this time, the lower port of the docking pipe 522 is still inserted into the feeding port of the intermediate storage bin 16;

[0144] b. The rotation drive motor C533 of the inner cover opening and closing device of the transfer tank starts, driving the plug-in disc 534 to rotate by a certain angle, so that the plug rod 5341 at the lower end of the plug-in disc 534 is aligned with the jack B351 in the operation panel B35 of the transfer tank. Then, the lifting drive device C521 starts, driving the plug-in disc 534 to move downward, so that the plug rod 5341 at the lower end of the plug-in disc 534 is inserted into the jack B351 of the operation panel B35 of the transfer tank. Then, the rotation drive motor C533 starts, driving the plug-in disc 534 to rotate, driving the operation panel B35 and the lead screw B33 of the transfer tank to rotate, and further driving the nut B34 to move downward along the lead screw B33. The nut B34 drives the inner sealing cover B39 to move downward through the inner sleeve B36 and the extension rod B38, so that the inner sealing cover B39 is separated from the discharge port B312 of the transfer tank, thereby forming an annular gap for the powder material to fall. The powder material in the inner cavity B311 of the transfer tank then falls through the annular gap, and then enters the interior of the intermediate storage bin 16 through the docking pipe 522 and the feeding port in sequence;

[0145] c. After the powder material in the transfer tank is completely discharged, the two linear motors A465 in the lower pipeline docking device act synchronously, respectively driving the upper movable pipeline 463 to move downward through the transmission of the connecting rod A467 to avoid interference and avoid the subsequent movement of the storage tank translation trolley;

[0146] d. The rotary drive motor C533 in the transfer tank inner cover opening and closing device is started, driving the plug-in disk 534 to rotate, driving the operating disk B35 and the screw rod B33 of the transfer tank to rotate, and then driving the nut B34 to move upward along the screw rod B33. The nut B34 drives the inner sealing cover B39 to move upward through the inner sleeve B36 and the extension rod B38, so that the inner sealing cover B39 fits the discharge port B312 of the transfer tank, thereby closing the discharge port B312 of the transfer tank; then, the lifting drive device C521 is started, driving the plug-in disk 534 to move upward, so that the plug rod 5341 at the lower end of the plug-in disk 534 withdraws from the socket B351 of the operating disk B35 of the transfer tank; at this point, the feeding operation is completed.

[0147] In this step, the upper end of the transfer silo 16 is equipped with a negative pressure dust suction port (not shown in the figure), and the negative pressure dust suction port is connected to an external negative pressure source. When the powder material enters the transfer silo 16, the external negative pressure source is immediately started to perform a negative pressure dust removal operation on the upper end of the transfer silo 16 to prevent the powder material from floating out from the feed port.

[0148] S06, Recycling of empty transfer tanks:

[0149] a. The front cylinder 517 and the rear cylinder 519 on the transfer tank translation trolley are respectively started to drive the front limit plate 516 and the rear limit plate 518 to retract to the bottom of the rolling conveying surface B, so that the front limit plate 516 and the rear limit plate 518 are separated from the two surfaces on the guide section 314 of the transfer tank, thereby releasing the locking state of the transfer tank in the placement station C510;

[0150] b. The transfer tank translation trolley drives the transfer tank to move from the feeding position to the tank transfer position, so that the inlet and outlet B517 of the transfer tank translation trolley is close to the second conveyor belt 200; then, the rollers on the transfer tank translation trolley are started to drive the transfer tank to move in the direction close to the inlet and outlet B517. During the movement, the two rows of second guide rollers 515 are respectively in contact with the two surfaces on the guide section 314 of the transfer tank, which plays a role in limiting the movement path of the transfer tank until the transfer tank is discharged from the inlet and outlet B517 to the outside of the transfer tank translation trolley;

[0151] c. After the transfer tank is discharged to the outside of the transfer tank rotating device, it passes through the second conveyor belt 200, the transfer elevator 18, the first conveyor belt 100, the inlet and outlet A416 of the transfer tank rotating device in sequence, and enters the rolling conveying surface A of the transfer tank rotating device; then the empty transfer tank is moved away from the rolling conveying surface A of the transfer tank rotating device by a cantilever crane, thus completing the recovery of the transfer tank.

[0152] Preferably, the feeding operation further includes step M which is performed after step S03 and in no particular order with steps S04, S05 and S06.

[0153] M, install the outer protective cover of the storage tank:

[0154] a. The transfer trolley of the storage tank drives the target storage tank with the outer protective cover removed to the fourth docking position. Since the upper end of the outer cover disassembly and assembly device of the storage tank is already connected with the outer protective cover, the upper sealing plate 2921 of the outer protective cover is located directly below the upper pressing plate 215 of the storage tank.

[0155] b. The electric push rod B431 of the outer cover disassembly and assembly device of the storage tank rises, driving the outer protective cover to move upward. When the upper sealing plate 2921 of the outer protective cover fits against the upper pressing plate 215 of the storage tank, the discharge port A212 of the storage tank is closed. Then, the traction electromagnet 434 descends, driving the lower push plate 2931 to move downward, and further driving the L-shaped rocker 294 to rotate inward (clockwise) around its hinge point towards the storage tank, so that the hook part 2941 of the L-shaped rocker 294 is placed on the upper end surface of the upper pressing plate 215.

[0156] c. The traction electromagnet 434 and the annular electromagnet 433 of the outer cover disassembly and assembly device of the storage tank are powered off, so that the traction electromagnet 434 releases the adsorption state with the lower push plate 2931, and the annular electromagnet 433 releases the adsorption state with the lower adsorption plate 2923. Then, the electric push rod B431 descends, completely separating the outer protective cover from the outer cover disassembly and assembly device of the storage tank. Due to the elastic force of the spring 295, the lower seat body 293 has a tendency to move downward, driving the L-shaped rocker 294 to have a tendency to rotate inward around its hinge point towards the storage tank, and further pressing the hook part 2941 of the L-shaped rocker 294 tightly against the upper end surface of the upper pressing plate 215. Thus, the outer protective cover has been installed on the target storage tank.

[0157] d. Repeat steps a to c to sequentially install outer protective covers on all the storage tanks on the transfer trolley of the storage tank.

[0158] The feeding operation of Embodiment 1 is as follows:

[0159] S01. Place the storage tank and the transfer tank respectively.

[0160] S02. Remove the outer protective cover of the storage tank.

[0161] S03. Feed multiple storage tanks into the transfer tank in sequence.

[0162] S04. Transfer the transfer tank to the transfer trolley of the transfer tank.

[0163] S05. Feed the transfer tank into the transfer bin.

[0164] S06. Recover the empty transfer tank.

[0165] Preferably, the feeding operation further includes step M that is carried out after step S03 and can be carried out in any order with steps S04, S05, and S06; M, installing the outer protective cover of the storage tank.

[0166] Among them, steps S01 - S02, S04 - S06, and step M are the same as the feeding operation in Embodiment 2 and will not be elaborated here. Only step S03 in Embodiment 1 is different from the feeding operation in Embodiment 2. Now, step S03 in Embodiment 1 is described as follows.

[0167] S03, feeding the multi - tank storage tanks into the transfer tank in sequence:

[0168] a. The rotation drive motor A412 in the transfer tank rotation device is started, driving the transfer tank placed at the placement station A417 to rotate to the first docking position, so that the upper sealing cover 32 of the transfer tank is directly below the electromagnetic chuck 453 of the transfer tank upper cover disassembly and assembly device;

[0169] b. The storage tank translation trolley drives the target storage tank to move to the fifth docking position, so that the discharge port A212 of the storage tank is directly above the upper movable pipe 463 of the lower pipeline docking device;

[0170] c. The lifting drive device B451 of the transfer tank upper cover disassembly and assembly device descends, driving the electromagnetic chuck 453 to descend. When the electromagnetic chuck 453 contacts the upper sealing cover 32 of the transfer tank, the electromagnetic chuck 453 is energized to hold the upper sealing cover 32; then, the lifting drive device B451 rises, driving the electromagnetic chuck 453 and the upper sealing cover 32 to move upward, thereby removing the upper sealing cover 32 from the feed port 313 of the transfer tank, and thus exposing the feed port 313 of the transfer tank;

[0171] d. The rotation drive motor A412 of the transfer tank rotation device is started, driving the transfer tank placed at the placement station A417 to rotate to the second docking position, so that the feed port 313 of the transfer tank is directly below the lower movable pipe 464 of the lower pipeline docking device;

[0172] e. The two linear motors A465 of the lower pipeline docking device act synchronously, respectively driving the upper movable pipe 463 to move upward through the transmission of the connecting rod A467, so that the upper port of the upper movable pipe 463 is docked with the discharge port A212 of the target storage tank; the two linear motors B466 of the lower pipeline docking device act synchronously, respectively driving the lower movable pipe 464 to move downward through the transmission of the connecting rod B468, so that the lower port of the lower movable pipe 464 is docked with the feed port 313 of the transfer tank;

[0173] f. The rotation drive motor B443 of the inner cover opening and closing device of the storage tank is started, driving the docking plate 444 to rotate by a certain angle, so that the finger rod 4441 of the docking plate 444 is aligned with the jack A241 of the operation panel A24 of the target storage tank. At the same time, the lifting drive device A442 is started, driving the docking plate 444 to move downward, so that the finger rod 4441 of the docking plate 444 is inserted into the jack A241 of the operation panel A24 of the target storage tank. Then, the rotation drive motor B443 of the inner cover opening and closing device of the storage tank is started, driving the docking plate 444 to rotate, driving the operation panel A24 and the lead screw A22 of the target storage tank to rotate, and further driving the nut A23 to move downward along the lead screw A22. The nut A23 drives the inner sealing cover A28 to move downward through the inner sleeve A25 and the extension rod A27, so that the inner sealing cover A28 is separated from the discharge port A212 of the target storage tank, thereby forming an annular gap for the powder material to fall. The powder material in the inner cavity A211 of the target storage tank then falls through the annular gap, and then passes through the upper movable pipe 463, the middle pipe 462, the lower movable pipe 464, and the feed port 313 of the transfer tank in sequence and enters the inner cavity B311 of the transfer tank.

[0174] g. After the powder material in the target storage tank is discharged completely, the following three operations are carried out simultaneously: 1. The two linear motors A465 in the lower pipe docking device act synchronously, respectively driving the upper movable pipe 463 to move downward through the transmission of the connecting rod A467 to avoid interfering with the subsequent movement of the storage tank translation trolley; 2. The two linear motors B466 in the lower pipe docking device act synchronously, respectively driving the lower movable pipe 464 to move upward through the transmission of the connecting rod B468 to avoid interfering with the subsequent rotation of the transfer tank located on the transfer tank rotating device; 3. The rotation drive motor B443 in the inner cover opening and closing device of the storage tank is started, driving the docking plate 444 to rotate, driving the operation panel A24 and the lead screw A22 of the target storage tank to rotate, and further driving the nut A23 to move downward along the lead screw A22. The nut A23 drives the inner sealing cover A28 to move downward through the inner sleeve A25 and the extension rod A27, so that the inner sealing cover A28 fits and closes the discharge port A212 of the target storage tank. Then, the lifting drive device A442 is started, driving the docking plate 444 to move upward, so that the finger rod 4441 of the docking plate 444 exits the jack A241 of the operation panel A24 of the target storage tank.

[0175] h. Repeat steps a - g to make other storage tanks on the storage tank translation trolley be docked and fed to the transfer tank in sequence.

[0176] i. After all the storage tanks on the storage tank translation trolley are fed, the rotation drive motor A412 of the transfer tank rotating device is started, driving the transfer tank in the placement station A417 to rotate to the first docking position, so that the feed port 313 of the transfer tank rotates to the directly below of the electromagnetic chuck 453 of the transfer tank upper cover disassembly and assembly device.

[0177] j. The lifting drive device B451 of the disassembly and assembly device for the upper cover of the transfer tank descends, driving the electromagnetic chuck 453 to descend, and inserts the upper sealing cover 323 adsorbed on the electromagnetic chuck 453 into the feed port 313 of the transfer tank; the electromagnetic chuck 453 is powered off to release the adsorption state with the upper sealing cover 323; the lifting drive device B451 ascends, driving the electromagnetic chuck 453 to ascend to avoid interfering with the subsequent rotation of the transfer tank located on the transfer tank rotating device.

[0178] In this step, during the process of the storage tank starting to discharge the powder material until the powder material in the storage tank is completely discharged (corresponding to sub-step f), the vibration motor 30 is started, the ball valve in the negative pressure dust removal device is opened, and the negative pressure fan 475 is started. The negative pressure is sequentially conducted through the negative pressure fan 475, the hose 474, the main pipe 472, and the branch pipe 473 to the filtering unit 471. All the filtering units 471 jointly suck the dust floating above the inner cavity B311 of the transfer tank. The dust is intercepted in the filtering unit 471, and the filtered air is discharged into the external environment through the branch pipe 473, the main pipe 472, the hose 474, and the negative pressure fan 475 in sequence.

[0179] In this step, after all the storage tanks on the waiting tank transfer cart complete the feeding (corresponding to the end of sub-step f - before the start of sub-step g), first turn off the negative pressure fan 475, then close the ball valve at the total air outlet of the main pipe 472, and finally disconnect the connection between the hose 474 and the total air outlet of the main pipe 472.

[0180] In this step, the transfer tank rotating device should avoid driving the transfer tank to always rotate in one direction, thereby preventing the hose from being wound around the transfer tank.

Claims

1. Automatic feeding system for radioactive powder materials, characterized in that: It includes a workshop, a storage tank, a transfer tank, a material merging assembly, and a material feeding assembly; Inside the workshop, there are a first-floor space, a second-floor space, and a third-floor space arranged from bottom to top in sequence; inside the workshop, there is a transfer elevator running through the first-floor space, the second-floor space, and the third-floor space from bottom to top. The transfer elevator has a lower open end and an upper open end in the first-floor space and the third-floor space respectively; an overhead slide and a jib crane are installed in the first-floor space, and a horizontal track A is provided on the overhead slide; a transfer silo is placed in the second-floor space, and a feed inlet is provided at the upper end of the transfer silo; a horizontal track B is provided on the ground of the third-floor space. One end of the horizontal track B is close to the upper open end of the transfer elevator, and the other end is far from the upper open end of the transfer elevator; Inside the storage tank, there is an inner cavity A, and a discharge port A is provided at the bottom of the storage tank. An inner seal cover A and an outer protection cover are respectively arranged inside and outside the discharge port A of the storage tank; Inside the transfer tank, there is an inner cavity B whose volume is several times that of the inner cavity A. A feed inlet is provided at the top of the transfer tank, and an upper seal cover is detachably installed on the feed inlet. A discharge port B is provided at the bottom of the transfer tank, and an inner seal cover B is arranged inside the discharge port B of the transfer tank; The material merging assembly includes a transfer tank rotating device, a storage tank translation trolley, a storage tank outer cover disassembly and assembly device, a storage tank inner cover opening and closing device, a transfer tank upper cover disassembly and assembly device, and a lower pipeline docking device; the transfer tank rotating device is arranged directly below the overhead slide, and there is an installation station A for positioning the transfer tank on it; the storage tank translation trolley is movably installed on the horizontal track A, and there are multiple installation stations B for positioning the storage tank on it; the storage tank outer cover disassembly and assembly device is arranged directly below the overhead slide, and it is used for disassembling and assembling the outer protection cover of the storage tank located at the installation station B; the storage tank inner cover opening and closing device is installed on the overhead slide, and it is used to control the movement of the inner seal cover A of the storage tank located at the installation station B, so as to fit or separate from the discharge port A; the transfer tank upper cover disassembly and assembly device is installed on the overhead slide, and it is used for disassembling and assembling the upper seal cover of the transfer tank located at the installation station A; the lower pipeline docking device is arranged between the transfer tank rotating device and the storage tank translation trolley, and it is used to connect the storage tank located at the installation station B with the transfer tank located at the installation station A; The material feeding assembly includes a transfer tank translation trolley, an upper pipeline docking device, and a transfer tank inner cover opening and closing device; the transfer tank translation trolley is movably installed on the horizontal track B, and there is an installation station C for positioning the transfer tank on it; the upper pipeline docking device is arranged between the transfer tank translation trolley and the transfer silo, and it is used to connect the transfer tank placed at the installation station C with the transfer silo; the transfer tank inner cover opening and closing device is arranged on the transfer tank translation trolley, and it is used to control the movement of the inner seal cover B of the transfer tank placed at the installation station C, so as to fit or separate from the discharge port B.

2. The automatic feeding system for radioactive powder materials according to claim 1, characterized in that: The storage tank includes a tank body A, a lead screw A, a nut A, an operation panel A, an inner sleeve A, an outer sleeve A, an extension rod A, an inner sealing cover A and an outer protective cover; Four legs are welded annularly and evenly at the lower end of the tank body A. An inner cavity A is provided inside the tank body A. A discharge port A is provided at the bottom of the tank body A. An annular step is provided on the outer wall of the lower end of the tank body A near the discharge port A. An annular upper pressing plate is fixedly installed on the annular step of the tank body A, and the upper pressing plate extends radially outward of the storage tank; The lead screw A is movably installed in the inner cavity A of the tank body A and is arranged at the center of the inner cavity A of the tank body A along the axial direction of the tank body A. The lead screw A is successively provided with an operation section, a smooth rod section and a threaded rod section from top to bottom. The operation section of the lead screw A extends out of the upper end of the tank body A. The lead screw A is rotatably connected to the tank body A through a tapered roller bearing on the smooth rod section; The nut A is threadedly connected to the threaded rod section of the lead screw A, and a guide groove A is provided on the outer wall surface of the nut A; The operation panel A is fixedly installed on the operation section of the lead screw A, and a plurality of jacks A are provided on the operation panel A and are annularly and evenly distributed around the lead screw A; The inner sleeve A is fixedly connected to the nut A and encloses the threaded rod section of the lead screw A through its inner hole; The inner side of the outer sleeve A is provided with guiding edges, which are fixedly installed on the tank body A on the outer side, and are slidably matched with the guide groove A of the nut A through the guiding edges on the inner side, and the outer sleeve A is movably sleeved outside the inner sleeve A through its inner hole; The upper end of the extension rod A is fixedly connected to the lower end of the inner sleeve A; The inner sealing cover A is in a conical ring shape and is fixedly installed at the lower end of the extension rod A, and is used to open or close the discharge port A at the bottom of the tank body A; The outer protective cover includes an upper seat body, a lower seat body, a spring and an L-shaped rocker; The upper seat body includes an upper sealing plate, a corner connecting plate and a lower adsorption plate fixedly connected in sequence from top to bottom; The upper end surface of the upper sealing plate is used to fit or separate from the upper pressing plate of the storage tank, so as to open or close the discharge port A of the storage tank. A ring-shaped boss X for accommodating a spring is provided in the central area of the lower end surface of the upper sealing plate. A plurality of corner connecting plates are annularly and evenly distributed between the upper sealing plate and the lower adsorption plate around the ring-shaped boss X. The upper end of the corner connecting plate is welded to the lower end surface of the upper sealing plate, and the lower end of the corner connecting plate is welded to the upper end surface of the lower adsorption plate. A central hole A for the lower seat body to pass through is provided at the center of the lower adsorption plate; The lower seat body includes a lower pushing plate and an upper annular plate fixedly connected in sequence from bottom to top; A ring-shaped boss Y for accommodating a spring is provided in the central area of the upper end surface of the lower pushing plate. A plurality of guiding grooves X are provided on the upper end surface of the lower pushing plate and are annularly and evenly distributed around the ring-shaped boss Y. The upper annular plate is arranged at the upper end of the ring-shaped boss Y and extends radially outward of the ring-shaped boss Y; An annular open area is provided between the outer side of the ring-shaped boss Y, the lower end of the upper annular plate and the upper end of the lower pushing plate of the lower seat body; The lower seat body is movably inserted into the lower open end of the ring-shaped boss X of the upper seat body through the upper open end of the ring-shaped boss Y, so that the ring-shaped boss X of the upper seat body is internally communicated with the ring-shaped boss Y of the lower seat body to form a spring placement cavity;The upper end of the L-shaped rocker is provided with a hook portion, the lower end is provided with a roller A, and the middle portion is provided with a turning portion. The turning portion of the L-shaped rocker is hinged to the lower end head of the angle connecting plate. The roller A of the L-shaped rocker is limited within the annular open interval, and the lower end of the roller A is embedded in the guide groove X; the spring is compressively arranged in the spring placement cavity, and it forces the lower seat body to move away from the upper seat body through its elastic force, thereby driving the L-shaped rocker to rotate inwardly around its hinge point towards the inside of the storage tank, so that the hook portion of the L-shaped rocker hooks the upper pressing plate of the storage tank; when an external force pushes the lower seat body to move towards the upper seat body, it drives the L-shaped rocker to rotate outwardly around its hinge point towards the outside of the storage tank, so that the hook portion of the L-shaped rocker disengages from the upper pressing plate of the storage tank.

3. The automatic feeding system for radioactive powder materials according to claim 2, characterized in that: The storage tank translation trolley includes a vehicle body A and an electric push rod A; roller B is provided at the lower end of the vehicle body A, and a plurality of guide rollers arranged horizontally are provided at the upper end of the vehicle body A. All the guide rollers jointly enclose a plurality of rectangular areas, and the rectangular area is the placement station B. A blanking hole A is provided in the vehicle body A at each placement station B; the vehicle body A is installed on the horizontal track A by rolling the roller B; the cylinder body of the electric push rod A is fixedly installed on the horizontal track A, and the piston rod of the electric push rod A is fixedly connected to the vehicle body A. When the piston rod of the electric push rod A expands and contracts, it drives the vehicle body A to perform horizontal reciprocating linear movement along the horizontal track A; when the storage tank is placed in any placement station B of the storage tank translation trolley, the discharge port A of the storage tank is directly opposite to the blanking hole A in this placement station B; when the storage tank is placed in the target placement station B on the storage tank translation trolley, the guide rollers on the four sides of the target placement station B are in contact with the four legs at the lower end of the storage tank to correct the deviation and adjust the posture of the storage tank, so as to limit the storage tank in the placement station B; when the storage tank translation trolley moves with the storage tank placed in the placement station B, there are a third docking position, a fourth docking position and a fifth docking position in the moving path of the storage tank; The storage tank outer cover disassembly and assembly device includes an electric push rod B, a bracket, a ring electromagnet and a traction electromagnet; the cylinder body of the electric push rod B is directly or indirectly fixedly installed on the ground of the first floor space, and the piston rod of the electric push rod B extends vertically upward; the bracket is directly or indirectly fixedly connected to the piston rod of the electric push rod B, and a central hole B is provided at the top thereof, and an electromagnet placement cavity communicating with the central hole B is provided therein; the ring electromagnet is fixedly installed at the upper end of the bracket, and a central hole C is provided at the center thereof, and it encloses the central hole B of the bracket through the central hole C; the lower end of the traction electromagnet is fixedly installed in the electromagnet placement cavity of the bracket, and the upper end extends out of the central hole B of the bracket and is located in the central hole C of the ring electromagnet. The upper end of the traction electromagnet makes a vertical reciprocating linear movement, so as to extend out of the upper end of the ring electromagnet or retract into the central hole C of the ring electromagnet; when the storage tank with an outer protective cover moves to the fourth docking position, and the storage tank outer cover disassembly and assembly device does not adsorb the outer protective cover, the lower adsorption plate of the outer protective cover is located directly above the ring electromagnet, and the lower push plate of the outer protective cover is located directly above the traction electromagnet; when the storage tank without an outer protective cover moves to the fourth docking position, and the storage tank outer cover disassembly and assembly device adsorbs the outer protective cover, the lower adsorption plate of the outer protective cover is magnetically attracted to the ring electromagnet, the lower push plate of the outer protective cover is magnetically attracted to the traction electromagnet, and the upper sealing plate of the outer protective cover is located directly below the upper pressing plate of the storage tank; The opening and closing device for the inner cover of the storage tank includes a gantry A, a lifting drive device A, a rotary drive motor B, and a docking plate; the gantry A is directly or indirectly fixedly installed on the overhead slide; the lifting drive device A is fixedly installed on the gantry A; the rotary drive motor B is fixedly installed on the lifting drive device A and is driven by the lifting drive device A to make vertical lifting movements; the docking plate is fixedly connected to the lower end of the rotary drive motor B and is driven by the rotary drive motor B to make horizontal rotations. Multiple finger rods for inserting into the insertion holes A of the operation plate A of the storage tank are provided at the lower end of the docking plate; when the storage tank moves to the third docking position, the operation plate A of the storage tank is directly below the docking plate of the opening and closing device for the inner cover of the storage tank.

4. The automatic feeding system for radioactive powder materials according to claim 3, characterized in that: transfer The tank includes a tank body B, an upper sealing cover, a lead screw B, a nut B, an operation plate B, an inner sleeve B, an outer sleeve B, an extension rod B, and an inner sealing cover B; a guiding section is provided at the lower end of the tank body B. The guiding section is a regular quadrangular prism with arc transitions at the edges. The inner cavity B is provided inside the tank body B, and the discharge port B is provided at the bottom of the tank body B. A plurality of feed ports are provided at the top of the tank body B, and all the feed ports are evenly distributed in a ring around the center line of the tank body B; the upper sealing cover is detachably installed on each feed port; the lead screw B is movably installed in the inner cavity B of the tank body B, and its axis coincides with the center line of the tank body B. The lead screw B is successively provided with an operation section, a smooth rod section, and a threaded rod section from top to bottom. The operation section of the lead screw B extends out of the upper end of the tank body B. The lead screw B is rotatably connected to the tank body B through tapered roller bearings at the smooth rod section; the nut B is threadedly connected to the threaded rod section of the lead screw B, and a guiding groove B is provided on the outer side wall surface of the nut B; the operation plate B is fixedly installed on the operation section of the lead screw B, and a plurality of insertion holes B evenly distributed in a ring around the lead screw B are provided thereon; the inner sleeve B is fixedly connected to the nut B and encloses the threaded rod section of the lead screw B; the outer sleeve B is sleeved outside the inner sleeve B, a guiding strip is provided on its inner side, it is fixedly installed on the tank body B on the outer side, and it is slidably matched with the guiding groove B of the nut B through the guiding strip on the inner side; the upper end of the extension rod B is fixedly connected to the lower end of the inner sleeve B; the inner sealing cover B is in a conical ring shape and is fixedly connected to the lower end of the extension rod B, and it is used to open or close the discharge port B at the bottom of the tank body B. The material merging assembly further includes a negative pressure dust removal device; the negative pressure dust removal device includes a filtering unit, a branch pipe, a main pipe, a flexible pipe and a negative pressure fan; a plurality of filtering units are annularly and evenly distributed on the top of the tank body B of the transfer tank. A filter element for filtering radioactive dust is provided in the filtering unit. The two ends of the filtering unit are respectively an air inlet end and an air outlet end. The air inlet end of the filtering unit extends into the inner cavity B of the transfer tank; the number of filtering units is the same as the number of feeding ports, and a filtering unit is arranged at the middle position between every two adjacent feeding ports; a main air outlet and a plurality of air inlets are provided on the main pipe. The number of air inlets is the same as the number of filtering units. A ball valve for controlling the on-off of air flow and a quick pipe joint for connecting the flexible pipe are provided on the main air outlet; the number of branch pipes is the same as the number of filtering units. One end of the branch pipe is communicated with the air outlet end of the corresponding filtering unit, and the other end of the branch pipe is communicated with the corresponding air inlet on the main pipe; one end of the flexible pipe is detachably connected to the quick pipe joint on the main air outlet of the main pipe, and the other end is detachably connected to the air inlet end of the negative pressure fan. The air outlet end of the negative pressure fan is communicated with the atmosphere.

5. The automatic feeding system for radioactive powder materials according to claim 3, characterized in that: transfer The tank includes a tank body B, an upper sealing cover, a lead screw B, a nut B, an operation disk B, an inner sleeve B, an outer sleeve B, an extension rod B, an inner sealing cover B and a vibration motor; a guiding section is provided at the lower end of the tank body B. The guiding section is a regular quadrangular prism with an arc transition at the edge. The inner cavity B is provided inside the tank body B, and the discharging port B is provided at the bottom of the tank body B. Only one feeding port is provided at the top of the tank body B; the upper sealing cover is detachably installed on the feeding port; the lead screw B is movably installed in the inner cavity B of the tank body B, and its axis is arranged coincidentally with the center line of the tank body B. The lead screw B is successively provided with an operation section, a smooth rod section and a threaded rod section from top to bottom. The operation section of the lead screw B extends out of the upper end of the tank body B. The lead screw B is rotatably connected to the tank body B through a tapered roller bearing at the smooth rod section; the nut B is threadedly connected to the threaded rod section of the lead screw B, and a guiding groove B is provided on the outer side wall surface of the nut B; the operation disk B is fixedly installed on the operation section of the lead screw B, and a plurality of jacks B arranged annularly around the lead screw B are provided thereon; the inner sleeve B is fixedly connected to the nut B and encloses the threaded rod section of the lead screw B; the outer sleeve B is sleeved outside the inner sleeve B, a guiding strip is provided on its inner side, it is fixedly installed on the tank body B on the outer side, and it is slidably matched with the guiding groove B of the nut B through the guiding strip on the inner side; the upper end of the extension rod B is fixedly connected to the lower end of the inner sleeve B; the inner sealing cover B is in a conical ring shape and is fixedly connected to the lower end of the extension rod B, and it is used to open or close the discharging port B at the bottom of the tank body B; the vibration motor is fixedly installed on the upper side wall of the tank body B; The material merging assembly further includes a negative pressure dust removal device; the negative pressure dust removal device includes a filtering unit, a branch pipe, a main pipe, a flexible pipe and a negative pressure fan; a plurality of filtering units and a feed inlet are annularly and evenly distributed on the top of the tank body B of the transfer tank. A filter element for filtering radioactive dust is provided in the filtering unit. The two ends of the filtering unit are respectively an air inlet end and an air outlet end, and the air inlet end of the filtering unit extends into the inner cavity B of the transfer tank; a main air outlet and a plurality of air inlets are provided on the main pipe, and the number of air inlets is the same as the number of filtering units. A ball valve for controlling the on-off of the air flow is provided on the main air outlet; the number of branch pipes is the same as the number of filtering units. One end of the branch pipe is communicated with the air outlet end of the corresponding filtering unit, and the other end of the branch pipe is communicated with the corresponding air inlet on the main pipe; one end of the flexible pipe is detachably connected to the main air outlet of the main pipe through a quick pipe joint, and the other end is detachably connected to the air inlet end of the negative pressure fan. The air outlet end of the negative pressure fan is communicated with the atmosphere.

6. The automatic feeding system for radioactive powder materials according to claim 4 or 5, characterized in that: transfer The tank rotating device includes a lower base, a rotary drive motor A, an upper turntable, a limit frame and a first guide roller; the lower base is directly or indirectly fixedly installed on the ground of the first floor space; the rotary drive motor A is fixedly installed on the lower base; the upper turntable is fixedly installed at the upper end of the rotary drive motor A and rotates horizontally under the drive of the rotary drive motor A. A plurality of rollers parallel to each other and horizontally arranged are provided at the upper end of the upper turntable. The rollers are arranged in three parallel rows at the upper end of the upper turntable. The middle row of rollers is a non-electrically driven roller, and the two rows of rollers on both sides are electrically driven rollers. A rolling conveying surface A is formed above all the rollers, and one end of the rolling conveying surface A in the conveying direction is the inlet / outlet A; the limit frame is fixedly installed on the upper turntable and is located at the other end of the rolling conveying surface A in the conveying direction. A limit electromagnet is embedded in the limit frame; two rows of first guide rollers are vertically arranged and rotatably installed on the upper turntable and are located on both sides of the rolling conveying surface A in the conveying direction. Each row of first guide rollers is composed of a plurality of first guide rollers vertically arranged and arranged in a horizontal row; the two rows of first guide rollers and the limit frame enclose the placement station A; when the transfer tank enters the rolling conveying surface A through the inlet / outlet A, the two rows of first guide rollers are respectively in contact with two surfaces on the guiding section of the transfer tank, and the limit electromagnet on the limit frame is used to adsorb one surface on the guiding section of the transfer tank, so as to limit the transfer tank in the placement station A; when the tank rotating device drives the transfer tank placed in the placement station A to rotate, there are a first docking position and a second docking position in the rotation path of the upper sealing cover of the transfer tank; The device for disassembling and assembling the upper cover of the transfer tank includes a lifting drive device B, a first extension rod and an electromagnetic chuck; the lifting drive device B is directly or indirectly fixedly installed on the overhead sliding table; the upper end of the first extension rod is fixedly connected to the lifting drive device B and is driven by the lifting drive device B to perform vertical lifting movement; the electromagnetic chuck is fixedly connected to the lower end of the first extension rod; when the transfer tank rotates to the first docking position, the upper sealing cover of the transfer tank is directly below the electromagnetic chuck of the device for disassembling and assembling the upper cover of the transfer tank, so as to facilitate the device for disassembling and assembling the upper cover of the transfer tank to disassemble or assemble the upper sealing cover of the transfer tank. The lower pipeline docking device includes bracket A, middle pipeline, upper movable pipeline, lower movable pipeline, linear motor A, linear motor B, connecting rod A and connecting rod B; bracket A is fixedly installed on the overhead sliding table; the middle pipeline is fixedly installed on bracket A; the upper movable pipeline and the lower movable pipeline are respectively movably inserted into the inner wall of the upper end and the outer wall of the lower end of the middle pipeline, and respectively extend out from the upper port and the lower port of the middle pipeline. There are two oppositely arranged third hinge parts on the outer wall of the upper end of the upper movable pipeline, and two oppositely arranged fourth hinge parts on the outer wall of the lower end of the lower movable pipeline; linear motor A includes base A, guide rail A and slider A. Base A is fixedly installed at the upper end of bracket A, guide rail A is horizontally installed on base A, and slider A is slidably installed on guide rail A. The number of linear motors A is two, and the two linear motors A are symmetrically arranged with respect to the middle pipeline; linear motor B includes base B, guide rail B and slider B. Base B is fixedly installed at the lower end of bracket A, guide rail B is horizontally installed on base B, and slider B is slidably installed on guide rail B. The number of linear motors B is two, and the two linear motors B are symmetrically arranged with respect to the middle pipeline; two connecting rods A are distributed on both sides of the middle pipeline. One end of each of the two connecting rods A is respectively hinged to the sliders A of the two linear motors A, and the other end of each of the two connecting rods A is respectively hinged to the two third hinge parts of the upper movable pipeline; two connecting rods B are distributed on both sides of the middle pipeline. One end of each of the two connecting rods B is respectively hinged to the sliders B of the two linear motors B, and the other end of each of the two connecting rods B is respectively hinged to the two fourth hinge parts of the lower movable pipeline; when the transfer tank rotates to the second docking position, the feed port of the transfer tank is located directly below the lower movable pipeline of the lower pipeline docking device, so as to facilitate the lower pipeline docking device to dock with the transfer tank; when the storage tank moves to the fifth docking position, the discharge port A of the storage tank is located directly above the upper movable pipeline of the lower pipeline docking device, so as to facilitate the lower pipeline docking device to dock with the storage tank.

7. The automatic feeding system for radioactive powder materials according to claim 6, characterized in that: The transfer tank translation trolley includes a vehicle body B and a limit component; the lower end of the vehicle body B is provided with driving wheels B, and the upper end of the vehicle body B is provided with a plurality of rollers arranged in parallel and horizontally. The rollers are arranged in four parallel rows above the vehicle body B. The two middle rows of rollers are non-electrically driven rollers, and the two rows of rollers on both sides are electrically driven rollers. A rolling conveying surface B is formed above all the rollers. One end of the rolling conveying surface B in the conveying direction is the inlet / outlet B. A first avoidance area and a second avoidance area are formed between the two middle rows of rollers. The first avoidance area and the second avoidance area are respectively located at both ends of the rolling conveying surface B in the conveying direction; a vacant area not covered by the rollers is provided at the center of the upper end of the vehicle body B, and a blanking hole B is provided in the vehicle body B in the vacant area; the limit component includes second guide rollers, a front air cylinder, a front limit plate, a rear air cylinder and a rear limit plate; two rows of second guide rollers are vertically arranged and rotatably installed on the vehicle body B and are located on both sides of the rolling conveying surface B in the conveying direction. Each row of second guide rollers is composed of multiple second guide rollers vertically arranged and arranged in a horizontal row; the lower side edge of the front limit plate is hinged above the vehicle body B and is located in the first avoidance area; the cylinder body of the front air cylinder is hinged above the vehicle body B and is located in the first avoidance area. The piston rod of the front air cylinder is hinged to the front limit plate. The piston rod of the front air cylinder expands and contracts to drive the front limit plate to rotate around its lower side edge, so that the front limit plate extends above the rolling conveying surface B or retracts below the rolling conveying surface B; the lower side edge of the rear limit plate is hinged above the vehicle body B and is located in the second avoidance area; the cylinder body of the rear air cylinder is hinged above the vehicle body B and is located in the second avoidance area. The piston rod of the rear air cylinder is hinged to the rear limit plate. The piston rod of the rear air cylinder expands and contracts to drive the rear limit plate to rotate around its lower side edge, so that the rear limit plate extends above the rolling conveying surface B or retracts below the rolling conveying surface B; the two rows of second guide rollers, the front limit plate and the rear limit plate enclose the placement station C; the vehicle body B is rollingly installed on the horizontal track B through the driving wheels B and moves in a reciprocating straight line along the horizontal track B; when the transfer tank enters the rolling conveying surface B through the inlet / outlet B, the two rows of second guide rollers respectively contact two surfaces on the guiding section of the transfer tank, and the front limit plate extending above the rolling conveying surface B and the rear limit plate extending above the rolling conveying surface B respectively abut against the other two surfaces on the guiding section of the transfer tank, so as to limit the transfer tank in the placement station C; when the transfer tank is limited in the placement station C, the discharge port B of the transfer tank is directly opposite to the blanking hole B; there are a tank transfer position and a feeding position in the moving path of the transfer tank translation trolley; when the transfer tank translation trolley is at the tank transfer position, the inlet / outlet B of the transfer tank translation trolley is directly or indirectly communicated with the upper open end of the transfer elevator to realize the two-way transfer of the transfer tank; when the transfer tank translation trolley is at the feeding position, the transfer tank placed in the placement station C is docked with the transfer silo through the upper pipeline docking device; The upper pipeline docking device includes a lifting drive device C, a docking pipe, a bracket C, a rotary drive motor D, a second extension rod, and a cover plate; the lifting drive device C is fixedly installed on the ground of the third - floor space and is fixedly connected to the vertically arranged docking pipe, and it is used to drive the docking pipe to perform vertical lifting movement; the lower end of the docking pipe passes through the bottom surface of the third - floor space and enters the second - floor space, and the upper end of the docking pipe extends out in the third - floor space. During the vertical lifting movement of the docking pipe, an upper limit position and a lower limit position are successively provided from top to bottom. During the vertical lifting movement of the docking pipe, the lower port of the docking pipe always extends into the feeding port of the transfer bin; the bracket C is fixedly installed on the ground of the third - floor space; the rotary drive motor D is fixedly installed on the bracket C, and its shaft extends horizontally and is fixedly connected to the front end of the second extension rod; the cover plate is fixedly connected to the rear end of the second extension rod and rotates under the drive of the rotary drive motor D, thereby covering or opening the upper port of the docking pipe; when the transfer tank placed in the placement station C moves to the feeding position with the transfer tank translation trolley, the docking pipe vertically rises to the upper limit position, that is, the upper port of the docking pipe passes through the blanking hole B of the transfer tank translation trolley and docks with the discharge port B of the transfer tank, and the docking pipe vertically descends to the lower limit position, that is, the upper port of the docking pipe exits the blanking hole B of the transfer tank translation trolley and separates from the discharge port B of the transfer tank. The inner - cover opening - closing device of the transfer tank includes a gantry B, a lifting drive device D, a rotary drive motor C, and a plug - in disk; the gantry B is directly or indirectly fixedly installed on the vehicle body B of the transfer tank translation trolley; the lifting drive device D is fixedly installed on the gantry B and is fixedly connected to the rotary drive motor C, and it is used to drive the rotary drive motor C to perform vertical lifting movement; the shaft of the rotary drive motor C extends vertically downward; the plug - in disk is fixedly connected to the shaft of the rotary drive motor C and is driven by the rotary drive motor C to perform horizontal rotation. Multiple insertion rods for inserting into the jack B of the operation panel B of the transfer tank are provided at the lower end of the plug - in disk of the docking disk; when the transfer tank is limited in the placement station C, the operation panel B of the transfer tank is located directly below the plug - in disk of the inner - cover opening - closing device of the transfer tank, so as to facilitate the inner - cover opening - closing device of the transfer tank to open or close the discharge port B of the transfer tank.

8. The automatic feeding system for radioactive powder materials according to claim 7, characterized in that: It also includes a first conveyor belt, a second conveyor belt, and a third conveyor belt; the first conveyor belt is arranged between the placement station A of the transfer tank rotating device and the lower open - top of the transfer elevator, and it is used for two - way transmission of the transfer tank between the placement station A and the lower open - top; the second conveyor belt is arranged between the placement station C of the transfer tank translation trolley and the upper open - top of the transfer elevator, and it is used for two - way transmission of the transfer tank between the placement station C and the upper open - top; the third conveyor belt is arranged adjacent to the transfer tank rotating device and is used to transfer the transfer tank to the placement station A of the transfer tank rotating device.

9. The automatic feeding system for radioactive powder materials according to claim 8, characterized in that: The number of the outer - cover disassembly - assembly devices of the storage tank is the same as the number of the placement stations B on the storage tank translation trolley.

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