Automatic feeding method for radioactive powder materials

Abstract

Automatic feeding method for radioactive powder materials, which is applied to an automatic feeding system for radioactive powder materials, realizes the automatic feeding of UO2 powder materials before the start of the uranium conversion process in the nuclear fuel preparation process. The automatic feeding system for radioactive powder materials includes a plant, a storage tank, a transfer tank, a material merging assembly, and a material feeding assembly. The feeding method is as follows: 1. Place the storage tank and the transfer tank separately; 2. Remove the outer protective cover of the storage tank; 3. Feed the multi-tank storage tanks into the transfer tank in sequence; 4. Transfer the transfer tank to the transfer tank trolley; 5. Feed the transfer tank into the transfer silo. Based on the traditional feeding process, the present invention optimizes the feeding process (merging the materials in multiple storage tanks and feeding them into one transfer tank, and then transporting the transfer tank to the third floor of the plant for one-time feeding), realizes the automatic feeding operation of UO2 powder materials in the uranium conversion process, and significantly improves 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 method for radioactive powder materials. Background Art

[0002] With the rapid development of the nuclear power trend, the installed capacity has increased rapidly, posing higher requirements for the supply of nuclear fuel. Uranium ore is the main raw material for preparing nuclear fuel. In the entire 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 UO 2 . Uranium conversion refers to the production process from refined UO 2 to UF 6 .

[0003] The UO 2 powder produced in the uranium purification step is stored in a special sealed container for later use. The sealed container is provided with a closable or openable discharge port at the lower end, and both the capacity and volume are designed to be relatively small for easy transportation or storage. When it comes to the uranium conversion step, it is necessary to discharge the UO 2 powder in multiple sealed containers into the transfer silo, and this operation is called the UO 2 feeding operation.

[0004] Currently in the industry, the UO 2 feeding operation is carried out in a three-story factory building. On the first floor of the factory building, multiple sealed containers filled with UO 2 powder are stored. On the second floor of the factory building, a hydrogen fluoride treatment device (for treating UO 2 ) and a transfer silo are arranged in sequence and connected. On the third floor of the factory building, a discharge port connected to the transfer silo is arranged, and the discharge port is used to receive the UO 2 powder poured out from the sealed container. When performing the UO 2 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-mentioned UO 2 feeding operation has the following deficiencies:

[0006] 1. During a working cycle of the feeding operation, a total of 3 - 4 cans of materials in sealed containers need to be fed into the transfer silo. In this process, it is necessary to transport the sealed containers from the first floor of the factory building to the third floor of the factory building. After the feeding is completed, the empty sealed containers are 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 in person. The steps are cumbersome and the efficiency is low.

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

[0008] 3. On the one hand, to prevent the UO 2 powder material from spreading outside the plant building and polluting the environment, the plant building 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 building, increasing the heat load inside the plant building. These two aspects jointly result in a relatively high environmental temperature inside the plant building. Especially in the hot summer, the indoor temperature on the third floor of the plant building can reach 50 - 60 °C, making the working environment of the operators on the third floor of the plant building very harsh. Summary of the Invention

[0009] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an automatic feeding method for radioactive powder materials, which is applied to an automatic feeding system for radioactive powder materials, and solves the problems of cumbersome feeding operation steps, low efficiency, time-consuming and laborious, radiation risk, and harsh working environment in the current UO 2 feeding operation.

[0010] The technical solution of the present invention is: an automatic feeding method for radioactive powder materials, which is applied to an automatic feeding system for radioactive powder materials, and realizes the automatic feeding of UO 2 powder material before the start of the uranium conversion process in the nuclear fuel preparation process;

[0011] The described automatic feeding system for radioactive powder materials includes a plant building, a storage tank, a transfer tank, a material merging assembly, and a material feeding assembly;

[0012] Inside the plant building, there are a first - floor space, a second - floor space, and a third - floor space from bottom to top in sequence; there is a transfer elevator inside the plant building that penetrates 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 there is a horizontal track A on the overhead sliding table; a transfer silo is placed in the second - floor space, and there is a feed inlet at the upper end of the transfer silo; there is a horizontal track B 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;

[0013] Inside the storage tank, there is an inner cavity A, and there is a discharge port A 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;

[0014] The inside of the transfer tank is provided with an inner cavity B whose volume is several times that of the inner cavity A. The top of the transfer tank is provided with a feed inlet, and an upper sealing cover is detachably installed on the feed inlet. The bottom of the transfer tank is provided with a discharge port B, and an inner sealing cover B is arranged inside the transfer tank at the discharge port B;

[0015] The material merging assembly includes a transfer tank rotating device, a storage tank translation trolley, a storage tank outer cover dismounting device, a storage tank inner cover opening and closing device, a transfer tank upper cover dismounting device, and a lower pipeline docking device; The transfer tank rotating device is arranged directly below the overhead sliding table, and is provided with an installation station A for positioning the transfer tank. When the transfer tank rotating device drives the transfer tank placed at the installation 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 storage tank translation trolley is movably installed on the horizontal track A, and is provided with a plurality of installation stations B for positioning the storage tank. When the storage tank translation trolley drives the storage tank placed at the installation station B to move, there are a third docking position, a fourth docking position, and a fifth docking position in the movement path of the storage tank; The storage tank outer cover dismounting device is installed on the overhead sliding table, and is used for dismounting 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 sliding table, 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 fit or separate from the discharge port A; The transfer tank upper cover dismounting device is installed on the overhead sliding table, and is used for dismounting 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;

[0016] 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 in the three-layer space, and is provided with an installation station C for positioning the transfer tank. There are a transfer tank position and a feeding position in the movement path of the transfer tank translation trolley; 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 fit or separate from the discharge port B;

[0017] The feeding method is as follows:

[0018] S01, respectively place the storage tank and the transfer tank: Place a group of storage tanks containing UO 2 powder material in the installation station B of the storage tank translation trolley, and place one storage tank in each installation station B; Place an empty transfer tank in the installation station A of the transfer tank rotating device;

[0019] S02, removing the outer protective cover of the storage tank: the storage tank translation trolley drives the target storage tank to move to the fourth docking position, so that the target storage tank and the storage tank outer cover disassembly and assembly device correspond to each other up and down; the storage tank outer cover disassembly and assembly device is actuated to remove the outer protective cover of the target storage tank; repeat the above steps to remove the outer protective covers of all storage tanks in the placement station B on the storage tank translation trolley in turn;

[0020] S03, multiple storage tanks are fed into the transfer tank in sequence: a. The transfer tank rotating device drives the transfer tank to rotate to the first docking position, so that the transfer tank and the transfer tank upper cover disassembly device correspond to each other up and down; b. The storage tank translation trolley drives the target storage tank to move to the fifth docking position, so that the storage tank and the lower pipeline docking device correspond to each other up and down; c. The transfer tank upper cover disassembly device is actuated to remove the upper sealing cover from the feed port of the transfer tank; d. The transfer tank rotation drive device drives the transfer tank to rotate to the second docking position, so that the transfer tank and the lower pipeline docking device correspond to each other up and down; e. The lower pipeline docking device is actuated to dock the target storage tank with the transfer tank up and down; f. The storage tank inner cover opening and closing device is actuated to separate the inner sealing cover A of the storage tank from the discharge port A, and then open the discharge port A of the target storage tank, and the UO in the target storage tank is discharged. 2 The powder material then enters the transfer tank through the lower pipe docking device; g. Wait for the UO in the target storage tank 2 After the powder material is discharged cleanly, the following two operations are performed at the same time: 1. The storage tank inner cover opening and closing device is actuated to make the inner sealing cover A of the storage tank fit with the discharge port A, thereby closing the discharge port A of the target storage tank; 2. The lower pipeline docking device is actuated to release the docking state between the target storage tank and the transfer tank; h. Repeat steps a to g to make the other storage tanks on the storage tank translation trolley dock with the transfer tank in turn for feeding; i. After all the storage tanks on the storage tank translation trolley have completed feeding, the transfer tank rotating device is actuated to drive the transfer tank to rotate to the first docking position, so that the transfer tank and the transfer tank upper cover disassembly and assembly device correspond up and down; j. The transfer tank upper cover disassembly and assembly device is actuated to insert the upper sealing cover into the feed port of the transfer tank;

[0021] S04, transferring the transfer tank to the transfer tank translation trolley: the transfer tank is discharged from the placement station A of the transfer tank rotating device, passes through the transfer elevator, and enters the placement station C of the transfer tank translation trolley;

[0022] S05, the transfer tank is fed into the transfer silo: a. The transfer tank translation trolley drives the transfer tank from the tank transfer position to the feeding position, so that the transfer tank and the upper pipeline docking device correspond to each other up and down; then, the upper pipeline docking device is activated to dock the transfer tank and the transfer silo up and down; b. The transfer tank inner cover opening and closing device is activated to separate the inner sealing cover B of the transfer tank from the discharge port B, and then the discharge port B of the transfer tank is opened, and the UO in the transfer tank is discharged. 2The powdered material then enters the transfer silo through the upper pipeline docking device; c. After the UO in the transfer tank is completely discharged, the upper pipeline docking device operates to release the docking state between the transfer tank and the transfer silo; d. The inner lid opening and closing device of the transfer tank operates to make the inner sealing lid B of the transfer tank fit with the discharge port B, thereby closing the discharge port B of the transfer tank. 2 After the powdered material is completely discharged, the upper pipeline docking device operates to release the docking state between the transfer tank and the transfer silo; d. The inner lid opening and closing device of the transfer tank operates to make the inner sealing lid B of the transfer tank fit with the discharge port B, thereby closing the discharge port B of the transfer tank.

[0023] A further technical solution of the present invention is that it further includes step S06 following step S05; S06, recycling the empty transfer tank: the transfer tank translation trolley drives the transfer tank to move from the feeding position to the tank transfer position, and then the transfer tank is discharged from the placement station C of the transfer tank translation trolley, and then returns to the placement station A of the transfer tank rotating device through the transfer elevator.

[0024] A still further technical solution of the present invention is that the feeding method further includes step M following step S03 and executed in no particular order with steps S04, S05, and S06; M, installing the outer protective cover of the storage tank: the storage tank translation trolley drives the target storage tank with the outer protective cover removed to move to the fourth docking position so that the target storage tank corresponds to the storage tank outer cover disassembly and assembly device up and down; the storage tank outer cover disassembly and assembly device operates to install the outer protective cover on the target storage tank; repeat the above steps to sequentially install the outer protective covers on all the storage tanks on the storage tank translation trolley.

[0025] The present invention has the following advantages compared with the prior art:

[0026] 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), it optimizes the feeding process (the materials in multiple storage tanks are combined and fed into one 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 operation of the UO 2 powdered material in the uranium conversion process, significantly improving the efficiency of the feeding operation.

[0027] The feeding process can generally be divided into two steps: combining and feeding the materials in multiple small tanks into one transfer tank; transporting the transfer tank to the third floor of the factory building for one-time feeding;

[0028] 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 set on the first floor of the factory building with a relatively suitable environment for easy operation and management by operators;

[0029] Among them, the second step is a relatively simple part of the entire feeding process. There are relatively few components involved in the interlocking cooperation, and the design difficulty of the automatic control is relatively low. Therefore, it is set on the third floor of the factory building, which enables the third floor of the factory building with relatively harsh environment to be without operators, reducing the working intensity of the operators and avoiding the damage of the operators from dust and radiation. 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. The number of actions of each component is small, and the probability of failure and error is relatively low.

[0030] 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 UO 2 powder material;

[0031] Among them, the inner cover mainly plays the role of sealing and preventing leakage. Turning the operation panel A at the upper end of the storage tank can control the lifting and moving of the inner cover, and thus realize the opening and closing of the discharge port A of the storage tank. 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, making the material fall evenly and the speed controllable, avoiding a large amount of dust generated by dumping type material falling;

[0032] Among them, the outer cover mainly plays the role of meeting the needs of automatic feeding and ensuring transportation safety. The structure of the outer cover is adapted to the structure of the disassembly and assembly device of the outer cover of the storage tank. The outer cover is removed or installed from the discharge port A of the storage tank through the disassembly and assembly device of the outer cover of the storage tank, without manual cover removal or installation; in addition, when the outer cover is installed on the discharge port A of the storage tank, it is impossible to remove the cover without damage by common hardware tools, and only the disassembly and assembly device of the outer cover of the storage tank can be used to remove the cover, ensuring that the storage tank containing UO 2 powder material is in a protected (or locked) state during transportation.

[0033] 4. On the one hand, there is only one feed inlet 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 link (corresponding to the S03 step of the feeding operation), each storage tank is docked with the only feed inlet 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 avoid the UO 2 powder material from piling up to form a "hill", effectively reducing the undulation height after the UO 2 powder material is piled up, which helps to make full use of the internal space of the transfer tank, so that the volume of the transfer tank can be designed relatively smaller, reducing the manufacturing cost of the transfer tank and being more convenient for transportation and management at the same time.

[0034] 5. In the material merging step (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 the UO 2 powder material from escaping from the feed inlet of the transfer tank and causing radioactive pollution to the external environment. Multiple filter units and one feed inlet are evenly distributed in a circular pattern on the top of the tank body B of the transfer tank. Starting the negative pressure fan can create an air extraction effect with multiple points, small flow rates, and small ranges at the air inlet ends of all the filter units, thereby dispersing the total air extraction flow rate to the air inlet ends of each filter unit. On the one hand, it effectively suppresses the dust, and on the other hand, it prevents excessive UO 2 powder material from being sucked away.

[0035] 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, and the moving path of the transfer tank is a fixed-point rotation. The moving path of the storage tank and the moving path of 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 the powder material 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 it rotates 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, efficient, and without redundant ineffective movements / actions.

[0036] The present invention will be further described below in conjunction with the drawings and embodiments. Brief Description of the Drawings

[0037] Figure 1 is a structural schematic diagram of the present invention;

[0038] Figure 2 is a structural schematic diagram of the factory building;

[0039] Figure 3 is an external view of the storage tank;

[0040] Figure 4 is Figure 3 an enlarged view of part A;

[0041] Figure 5 is an internal structural diagram of the storage tank;

[0042] Figure 6 is Figure 5 an enlarged view of part B;

[0043] Figure 7 is Figure 5 a cross-sectional view taken along line C-C;

[0044] Figure 8 is a state diagram when the outer protective cover is removed by the outer cover disassembly and installation device of the storage tank;

[0045] Figure 9State diagram when the outer protective cover is installed on the disassembly and assembly device for the outer cover of the storage tank;

[0046] Figure 10 Schematic diagram of the structure and installation position of the translation trolley for the storage tank;

[0047] Figure 11 Schematic diagram of the structure of the rotating device for the transfer tank;

[0048] Figure 12 Schematic diagram of the structure of the lower pipeline docking device;

[0049] Figure 13 Schematic diagram of the structure of the upper pipeline docking device;

[0050] Figure 14 Schematic diagram of the structure of the transfer tank translation trolley;

[0051] Figure 15 Assembly relationship diagram of some components of the transfer tank translation trolley;

[0052] Figure 16 Schematic diagram of the structure and installation position of the inner cover opening and closing device for the storage tank, the disassembly and assembly device for the upper cover of the transfer tank, and the lower pipeline docking device;

[0053] Figure 17 For Figure 16 Enlarged view of part D;

[0054] Figure 18 For Figure 16 Enlarged view of part E;

[0055] Figure 19 For Figure 16 Enlarged view of part F;

[0056] Figure 20 Schematic diagram of the structure of the material feeding assembly;

[0057] Figure 21 For Figure 20 Enlarged view of part G;

[0058] Figure 22 Schematic diagram of the structure of the material merging assembly;

[0059] Figure 23 External structure diagram of the transfer tank;

[0060] Figure 24 Internal structure diagram of the transfer tank;

[0061] Figure 25 For Figure 24 Enlarged view of part H;

[0062] Figure 26 For Figure 24Enlarged view of part I.

[0063] Note: Figure 1 In order to avoid the components in the first - layer space being blocked, the ground and transfer silos in the second - layer space are omitted from the drawing. Figure 7 The operation panel A in is omitted from the drawing. Figure 12 The horizontal track A in is omitted from the drawing.

[0064] Legend Explanation: First - floor space 11; Second - floor space 12; Third - floor space 13; Overhead slide 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 seal 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 inlet 313; Guide section 314; Upper seal 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 seal 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; Drop - 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; Drop - 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 DESCRIPTION Example 1

[0065] like Figure 1 - 26 As shown, the automatic feeding system for radioactive powder materials includes a plant, 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 pipe docking device and a negative pressure dust removal device. The material feeding assembly includes a transfer tank translation trolley, an upper pipe docking device and a transfer tank inner cover opening and closing device.

[0066] The factory building is provided with a first-floor space 11, a second-floor space 12 and a third-floor space 13 from bottom to top. A transfer elevator 18 is provided inside the factory building, which runs through 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 provided with a lower opening 181 and an upper opening 182 in the first-floor space 11 and the third-floor space 13, respectively. The transfer elevator 18 is used to receive or discharge a transfer tank at the lower opening 181, or to receive or discharge a transfer tank at the upper opening 182, or to lift a transfer tank loaded with materials from the first-floor space 11 to the third-floor space 13, or to lower an empty transfer tank from the third-floor space 13 to the first-floor space 11. The specific structure of the transfer elevator 18 is prior art, and reference can be made to the description of the "lift elevator" in the patent document CN113443329A, which will not be repeated here. An overhead slide 14 and a cantilever crane (not shown) are installed in the first-floor space 11, and a horizontal track A15 is provided on the overhead slide 14. A transfer bin 16 is placed in the second-floor space 12, and a material inlet is provided at the upper end of the transfer bin 16. A horizontal track B17 is provided on the ground (or floor) of the third-floor space 13, and one end of the horizontal track B17 is close to the upper opening 182 of the transfer elevator 18, and the other end is far away from the upper opening 182 of the transfer elevator 18.

[0067] The material storage tank includes a tank body A21, a screw rod A22, a nut A23, an operating panel A24, an inner sleeve A25, an outer sleeve A26, an extension rod A27, an inner sealing cover A28 and an outer protective cover.

[0068] Tank A21 is equipped with UO 2The inner cavity A211 of the powder material, a discharge port A212 communicating with the inner cavity A211 is provided at the bottom of the tank body A21. An annular step 213 is provided on the outer wall of the lower end of the tank body A21 near the discharge port A212. An annular upper pressing plate 215 is welded on the annular step 213 of the tank body A21, and the upper pressing plate 215 extends radially outward of the storage tank. Four legs 214 are welded evenly in a ring at the lower end of the tank body A21. 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, and the lead screw A22 is rotatably connected with the tank body A21 through a ball bearing on the smooth rod section. The nut A23 is threadedly connected to the threaded rod section of the lead screw A22, and a guide groove A is provided on the outer wall surface of the nut A23. The operation disc A24 is fixedly installed on the operation section of the lead screw A22, and a plurality of jacks A241 evenly distributed in a ring around the lead screw A22 are provided on the operation disc A24. 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, a guide rib 261 is provided on its inner side, it is fixedly installed on the tank body A21 on the outer side, and it is slidably matched with the guide groove A of the nut A23 through the guide rib 261 on the 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.

[0069] The inner sealing cover A28 is in a conical ring shape and is fixedly installed on the outer wall of the lower end of the extension rod A27, and 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), and 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.

[0070] 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, so as to open or close the discharge port A212 of the storage tank. In the central area of the lower end surface of the upper sealing plate 2921, there is an annular boss X2924 for accommodating the spring 295. 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 annular 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 passage of the lower seat body 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. In the central area of the upper end surface of the lower pushing plate 2931, there is an annular boss Y2933 for accommodating the spring. On the upper end surface of the lower pushing plate 2931, there are a plurality of guiding grooves X which are annularly and evenly distributed around the annular boss Y2933. The upper annular plate 2932 is arranged at the upper end of the annular boss Y2933 and extends radially outward of the annular boss Y2933. There is an annular open area 2934 between the outside of the annular 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 annular boss X2924 of the upper seat body 292 through the upper open end of the annular boss Y2933, so that the inside of the annular boss X2924 of the upper seat body 292 is communicated with the inside of the annular 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 part 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 installed 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, and 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 point towards the inside 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 point towards the outside 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.

[0071] 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. Inside the tank body B31, there is a cavity B311 for containing UO 2 powder material. At the bottom of the tank body B31, there is a discharge port B312 communicating with the cavity B311, and there is only one feed port 313 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 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 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 the outer side wall surface. 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 circular pattern 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 the inner side, 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: 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 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.

[0072] 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 A 412, 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 A 412 is fixedly installed on the lower base 411. The upper turntable 413 is fixedly installed at the upper end of the rotary drive motor A 412 and rotates horizontally under the drive of the rotary drive motor A 412. A plurality of rollers arranged parallel to each other 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 A 416 (the inlet / outlet A 416 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 A 417. When the transfer tank enters the rolling conveying surface A through the inlet / outlet A 416, 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 A 417. When the transfer tank rotating device drives the transfer tank placed in the installation station A 417 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.

[0073] 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 together enclose a plurality of rectangular areas. Each rectangular area is an installation station B423. The vehicle body A421 is provided with a blanking hole A424 in each installation station B423. The storage tank translation trolley is installed on the horizontal track A15 by rolling the rollers B422. 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 is aligned with the blanking hole A424 in this installation station B423. 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 expands and contracts, 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 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.

[0074] The device for disassembling and assembling the outer cover of the storage tank is used for disassembling and assembling 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 included 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 straight line in the vertical direction, so as to extend out 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 top 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 top 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.

[0075] 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 a vertical lifting movement. 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 a horizontal rotation. 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.

[0076] 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 a vertical lifting movement. 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 install the upper sealing cover 32 of the transfer tank.

[0077] The lower pipeline docking device is used to dock the storage tank and the transfer tank. The lower pipeline docking device includes a support 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 support A461 is fixedly installed on the overhead slide 14. The middle pipeline 462 is fixedly installed on the support 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 oppositely arranged third hinge parts are provided on the outer wall of the upper end of the upper movable pipeline 463, and two oppositely 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 on the upper end of the support 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 on the lower end of the support 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.

[0078] The negative pressure dust removal device includes a filtering unit 471, a main pipe 472, branch pipes 473, a 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. A main outlet and a plurality of inlets are provided on the main pipe 472. The number of inlets is the same as the number of filtering units 471. A ball valve for controlling the on-off of the air flow is provided on the main outlet. The number of branch pipes 473 is the same as the number of 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 inlet on the main pipe 472. One end of the hose 474 is detachably connected to the main 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.

[0079] The material feeding assembly includes a transfer tank translation trolley, an upper pipeline docking device and an opening and closing device for the inner cover of the transfer tank.

[0080] 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. There is a vacant area not covered by the rollers at the center of the upper end of the vehicle body B511. 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 arranged in a horizontal 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 enclose 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 conveyor surface B through the inlet and outlet B513, two rows of second guide rollers 515 are respectively in contact with two surfaces on the guide section 314 of the transfer tank, and the front limit plate 516 extending above the rolling conveyor surface B and the rear limit plate 518 extending above the rolling conveyor surface B are respectively abutted against the other two surfaces on the guide 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 transmission 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.

[0081] 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 with 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 out and is fixedly connected with 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, so as to shield or open 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 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.

[0082] The inner cover opening and closing device of the transfer tank is fixedly installed on the transfer trolley of the transfer tank, which is used to control the inner sealing cover B39 of the transfer tank to fit or separate from the discharge port B312, thereby opening or closing 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 disk 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, which 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 disk 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 disk 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 disk 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.

[0083] 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.

[0084] 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 gap.

[0085] 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.

[0086] 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 gap.

[0087] Preferably, the volume of the inner cavity B311 of the transfer tank is 4 to 6 times the volume of the inner cavity A211 of the storage tank.

[0088] Preferably, an outward-expanded 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.

[0089] 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.

[0090] Preferably, the number of the outer cover disassembly and assembly devices of the storage tank is the same as the number of the placement stations B423 on the storage tank translation trolley.

[0091] Preferably, an outwardly expanding third tapered 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.

[0092] 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.

[0093] The above-mentioned automatic feeding system for radioactive powder materials is used for the automatic feeding operation of UO 2 powder materials before the start of the uranium conversion process in the nuclear fuel preparation process. Before feeding, each component in the automatic feeding system for radioactive powder materials is in an initial state. In the initial state:

[0094] 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;

[0095] b. The inner sealing cover A28 of the transfer tank fits against the discharge port B312 to close the discharge port B312;

[0096] 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;

[0097] d. The docking disc 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;

[0098] 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;

[0099] 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;

[0100] g. The ball valve in the negative pressure dust removal device is in the closed state;

[0101] 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 conveyor surface B;

[0102] 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;

[0103] j. The plug-in disc 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.

[0104] The feeding operation is as follows:

[0105] S01. Place the storage tank and the transfer tank respectively:

[0106] a. Operate the jib 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;

[0107] b. Operate the jib crane to lift a transfer tank onto the third conveyor belt 300. The rotary 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 are facing the third conveyor belt 300;

[0108] 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 conveyor 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 moving process, 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 moving 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.

[0109] S02. Remove the outer protective cover of the storage tank:

[0110] 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 directly above the ring electromagnet 433, and the lower push plate 2931 of the outer protective cover is directly above the traction electromagnet 434;

[0111] b. The electric push rod B431 of the storage tank outer cover disassembly and assembly device rises, driving the ring electromagnet 433 to move upward. When the ring electromagnet 433 contacts the lower adsorption plate 2923, the ring 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 face of the upper pressure plate 215, thereby unlocking the outer protective cover from the target storage tank;

[0112] 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 position unchanged. Then, the electric push rod B431 descends, driving the outer protective cover to move downward, so that the outer protective cover is completely separated from the target storage tank;

[0113] 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.

[0114] S03. Multiple storage tanks are sequentially fed into the transfer tank:

[0115] a. The rotary 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;

[0116] 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;

[0117] 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 attract 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, so that the feed port 313 of the transfer tank is exposed;

[0118] d. The rotation drive motor A412 of the transfer tank rotating device is started, driving the transfer tank placed at the placement station A417 to rotate to the second docking position, so that the feed inlet 313 of the transfer tank is directly below the lower movable pipe 464 of the lower pipe docking device;

[0119] e. The two linear motors A465 of the lower pipe docking device act synchronously. Respectively through the transmission of the connecting rod A467, they 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, they drive the lower movable pipe 464 to move downward, so that the lower port of the lower movable pipe 464 is docked with the feed inlet 313 of the transfer tank;

[0120] 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 further 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 then 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 feed inlet 313 of the transfer tank and enters the inner cavity B311 of the transfer tank;

[0121] 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. Through the transmission of the connecting rod A467 respectively, the upper movable pipeline 463 is driven 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. Through the transmission of the connecting rod B468 respectively, the lower movable pipeline 464 is driven to move upward to avoid interfering with the subsequent rotation of the transfer tank on the transfer tank rotating device; 3. The rotary drive motor B443 in the storage tank inner cover opening and closing device is started to drive the docking disc 444 to rotate, driving the operation disc A24 and the lead screw A22 of the target storage tank to rotate. Then, the nut A23 is driven 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 disc 444 to move upward, so that the finger rod 4441 of the docking disc 444 exits the jack A241 of the operation disc A24 of the target storage tank;

[0122] h. Repeat steps a - g to enable other storage tanks on the storage tank translation trolley to be successively docked with the transfer tank for feeding;

[0123] i. After all the storage tanks on the storage tank translation trolley are filled, the rotary 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 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;

[0124] j. The lifting drive device B451 of the transfer tank upper cover disassembly and assembly device descends, driving the electromagnetic chuck 453 to descend, and the upper sealing cover 323 adsorbed on the electromagnetic chuck 453 is inserted 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 on the transfer tank rotating device.

[0125] In this step, during the process of the storage tank starting to discharge the powder material - 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 conducted to the filter unit 471 in sequence through the negative pressure fan 475, the hose 474, the main pipe 472 and the branch pipe 473. The dust in the upper part of the inner cavity B311 of the transfer tank is suctioned by all the filter units 471 together. 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.

[0126] In this step, after all the storage tanks on the transfer trolley of the material waiting tank have completed 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 and the vibration motor 30, then close the ball valve on the total air outlet of the main pipe 472, and finally disconnect the hose 474 from the total air outlet of the main pipe 472.

[0127] 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 winding around the transfer tank.

[0128] S04. Transfer the transfer tank to the transfer trolley of the transfer tank:

[0129] a. The rotary drive motor A412 of the rotating device of the transfer tank starts, driving 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; then, the roller drives the transfer tank to move in the direction close to the inlet and outlet A416. During the movement, the two rows of first guiding rollers 415 are respectively in contact with 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;

[0130] b. After the transfer tank is discharged to the outside of the rotating device of the transfer tank, it 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 in sequence, and enters the rolling conveying surface B of the transfer trolley of the transfer tank;

[0131] c. The rollers on the transfer trolley of the transfer tank start, driving the transfer tank to move to the central area of the rolling conveying 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 limiting the movement path of the transfer tank; after the transfer tank moves to the central area of the rolling conveying surface B, the rollers stop operating, and the front cylinder 517 and the rear cylinder 519 start respectively, driving the front limit plate 516 and the rear limit plate 518 to extend above the rolling conveying surface B, so that the front limit plate 516 and the rear limit plate 518 are respectively abutted 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 trolley of the transfer tank.

[0132] S05. Transfer the transfer tank into the transfer silo:

[0133] a. The rotation drive motor D524 of the upper pipeline docking device is started, and the cover plate 526 is driven 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 transfer position to the feeding position, so that the transfer tank is directly opposite to the upper pipeline docking device up and down; then, the lifting drive device C521 of the upper pipeline docking device is started, 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 through 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 transfer bin 16;

[0134] b. The rotation drive motor C533 of the inner cover opening and closing device of the transfer tank is started, driving the plug-in disk 534 to rotate a certain angle, so that the plug rod 5341 at the lower end of the plug-in disk 534 is aligned with the jack B351 in the operation panel B35 of the transfer tank; then, the lifting drive device C521 is started, driving the plug-in disk 534 to move downward, so that the plug rod 5341 at the lower end of the plug-in disk 534 is inserted into the jack B351 of the operation panel B35 of the transfer tank; then, the rotation drive motor C533 is started, driving the plug-in disk 534 to rotate, driving the operation panel B35 and the lead screw B33 of the transfer tank to rotate, and then 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, thus 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 transfer bin 16 through the docking pipe 522 and the feeding port in sequence;

[0135] 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;

[0136] d. The rotation drive motor C533 in the inner cover opening and closing device of the transfer tank is started, driving the plug-in disk 534 to rotate, driving the operation panel B35 and the lead screw B33 of the transfer tank to rotate, and then driving the nut B34 to move upward along the lead screw 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, thus 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 jack B351 of the operation panel B35 of the transfer tank; thus, the feeding operation is completed.

[0137] In this step, the upper end of the transfer bin 16 is provided with a negative pressure dust suction port (not shown in the figure), and the negative pressure dust suction port is communicated with an external negative pressure source. When the powder material enters the transfer bin 16, the external negative pressure source is immediately started to perform negative pressure dust removal operation on the upper end of the transfer bin 16, so as to prevent the powder material from floating out of the feeding port.

[0138] S06, Recycle the empty transfer tank:

[0139] a. The front cylinder 517 and the rear cylinder 519 on the transfer tank translation trolley are respectively started, driving the front limit plate 516 and the rear limit plate 518 to retract below the rolling conveying surface B, so that the front limit plate 516 and the rear limit plate 518 are disengaged from the two surfaces on the guiding section 314 of the transfer tank, thereby releasing the locking state of the transfer tank in the placement station C510;

[0140] b. The transfer tank translation trolley drives the transfer tank to move from the feeding position to the tank transfer position, making the inlet and outlet B517 of the transfer tank translation trolley adjacent 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 guiding rollers 515 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 B517 to the outside of the transfer tank translation trolley;

[0141] 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, and 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 lifted off the rolling conveying surface A of the transfer tank rotating device by the cantilever crane, that is, the recycling of the transfer tank is completed.

[0142] Preferably, the feeding operation further includes step M that follows step S03 and is executed without priority order with steps S04, S05, and S06.

[0143] M, Install the outer protective cover of the storage tank:

[0144] a. The storage tank translation trolley drives the target storage tank with the outer protective cover removed to move to the fourth docking position. Since the upper end of the storage tank outer cover disassembly and assembly device 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;

[0145] 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 portion 2941 of the L-shaped rocker 294 is placed on the upper end surface of the upper pressing plate 215.

[0146] c. The traction electromagnet 434 and the ring 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 ring 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 portion 2941 of the L-shaped rocker 294 against the upper end surface of the upper pressing plate 215. Thus, the outer protective cover has been installed on the target storage tank.

[0147] d. Repeat steps a to c to sequentially install outer protective covers on all the storage tanks on the storage tank translation trolley.

Claims

1. Automatic feeding method for radioactive powder materials, characterized in that: applying In the automatic feeding system for radioactive powder materials, during the preparation process of nuclear fuel, automatic feeding of UO 2 powder materials is realized before the start of the uranium conversion process; the described automatic feeding system for radioactive powder materials, including a plant, a storage tank, a transfer tank, a material merging assembly and a material feeding assembly; 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 cantilever crane are installed in the first - floor space, and there is a horizontal track A on the overhead sliding table; a transfer bin is placed in the second - floor space, and there is a feeding port at the upper end of the transfer bin; there is a horizontal track B 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 there is a discharge port A 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; Inside the transfer tank, there is an inner cavity B whose volume is several times that of the inner cavity A. There is a feeding port at the top of the transfer tank, and an upper sealing cover is detachably installed on the feeding port. There is a discharge port B at the bottom of the transfer tank, and an inner sealing 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 dismounting and mounting device, a storage - tank inner - cover opening and closing device, a transfer - tank upper - cover dismounting and mounting device and a lower - pipeline docking device; the transfer - tank rotating device is arranged directly below the overhead sliding table, and there is an installation station A for positioning the transfer tank on it. When the transfer - tank rotating device drives the transfer tank placed at the installation 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 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. When the storage - tank translation trolley drives the storage tank placed at the installation station B to move, there are a third docking position, a fourth docking position and a fifth docking position in the movement path of the storage tank; the storage - tank outer - cover dismounting and mounting device is installed on the overhead sliding table, and it is used for dismounting and mounting 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 sliding table, and it is used to control the movement of the inner sealing 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 dismounting and mounting device is installed on the overhead sliding table, and it is used for dismounting and mounting 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 it is used to connect the storage tank located at the installation station B and 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 an inner cover opening and closing device for the transfer tank; the transfer tank translation trolley is movably installed on the horizontal track B in the three-story space, and is provided with a placement station C for positioning the transfer tank. There are a tank transfer position and a feeding position in the moving path of the transfer tank translation trolley; the upper pipeline docking device is arranged between the transfer tank translation trolley and the transfer silo, and is used to connect the transfer tank placed in the placement station C with the transfer silo; the inner cover opening and closing device for the transfer tank is arranged on the transfer tank translation trolley, and is used to control the movement of the inner sealing cover B of the transfer tank placed in the placement station C, so as to fit or separate from the discharge port B. The feeding method is as follows: S01, separately place the storage tank and the transfer tank: Place a group of storage tanks containing UO 2 powder material in the placement station B of the storage tank translation trolley, and place one storage tank in each placement station B; Place an empty transfer tank in the placement station A of the transfer tank rotating device; S02. Remove the outer protective cover of the storage tank: The storage tank translation trolley drives the target storage tank to move to the fourth docking position so that the target storage tank corresponds to the storage tank outer cover disassembly and assembly device up and down; the storage tank outer cover disassembly and assembly device operates to remove the outer protective cover of the target storage tank; repeat the above steps to sequentially remove the outer protective covers of all the storage tanks in the placement station B on the storage tank translation trolley. S03. Multiple storage tanks are successively fed into the transfer tank: a. The transfer tank rotating device drives the transfer tank to rotate to the first docking position so that the transfer tank and the transfer tank upper cover disassembly and assembly device are vertically aligned; b. The storage tank translation trolley drives the target storage tank to move to the fifth docking position so that the storage tank and the lower pipeline docking device are vertically aligned; c. The transfer tank upper cover disassembly and assembly device operates to remove the upper sealing cover from the feed inlet of the transfer tank; d. The transfer tank rotation driving device drives the transfer tank to rotate to the second docking position so that the transfer tank and the lower pipeline docking device are vertically aligned; e. The lower pipeline docking device operates to vertically dock the target storage tank and the transfer tank; f. The storage tank inner cover opening and closing device operates to separate the inner sealing cover A of the storage tank from the discharge port A, thereby opening the discharge port A of the target storage tank, and the UO 2 powder material then enters the transfer tank through the lower pipeline docking device; g. After the UO 2 powder material in the target storage tank is completely discharged, the following two operations are performed simultaneously:

1. The storage tank inner cover opening and closing device operates to make the inner sealing cover A of the storage tank fit with the discharge port A, thereby closing the discharge port A of the target storage tank; 2. The lower pipeline docking device operates to release the docking state between the target storage tank and the transfer tank; h. Repeat steps a to g to successively dock and feed other storage tanks on the storage tank translation trolley with the transfer tank; i. After all the storage tanks on the storage tank translation trolley are fed, the transfer tank rotating device operates to drive the transfer tank to rotate to the first docking position so that the transfer tank and the transfer tank upper cover disassembly and assembly device are vertically aligned; j. The transfer tank upper cover disassembly and assembly device operates to insert the upper sealing cover into the feed inlet of the transfer tank; S04. Transfer the transfer tank to the transfer tank translation trolley: The transfer tank is discharged from the placement station A of the transfer tank rotating device and enters the placement station C of the transfer tank translation trolley through the transfer elevator. S05, Transfer the materials in the transfer tank to the transfer silo: a. 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 upper pipeline docking device operates to vertically dock the transfer tank with the transfer silo; b. The inner cover opening and closing device of the transfer tank operates to separate the inner sealing cover B of the transfer tank from the discharge port B, thereby opening the discharge port B of the transfer tank, and the UO 2 powder material then enters the transfer silo through the upper pipeline docking device; c. After the UO 2 powder material in the transfer tank is completely discharged, the upper pipeline docking device operates to release the docking state between the transfer tank and the transfer silo; d. The inner cover opening and closing device of the transfer tank operates to make the inner sealing cover B of the transfer tank fit with the discharge port B, thereby closing the discharge port B of the transfer tank.

2. The automatic feeding method for radioactive powder materials as described in claim 1, characterized in that: It further includes an S06 step following the S05 step; S06. Recover the empty transfer tank: The transfer tank translation trolley drives the transfer tank to move from the feeding position to the tank transfer position, and then the transfer tank is discharged from the placement station C of the transfer tank translation trolley and returns to the placement station A of the transfer tank rotating device through the transfer elevator.

3. The automatic feeding method for radioactive powder materials as described in claim 2, characterized in that: The feeding method further includes an M step following the S03 step and executed without a specific order with the S04, S05, and S06 steps; M. Install the outer protective cover of the storage tank: The storage tank translation trolley drives the target storage tank with the outer protective cover removed to move to the fourth docking position so that the target storage tank corresponds to the storage tank outer cover disassembly and assembly device up and down; the storage tank outer cover disassembly and assembly device operates to install the outer protective cover on the target storage tank; repeat the above steps to sequentially install the outer protective covers on all the storage tanks on the storage tank translation trolley.

4. The automatic feeding method for radioactive powder materials as described in claim 3, 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 to the lower end of the tank body A in a circumferential and uniform distribution. The inner cavity A is provided inside the tank body A. The discharge port A is provided at the bottom of the tank body A. A circumferential step is provided on the outer wall of the lower end of the tank body A near the discharge port A. An annular upper pressure plate is fixedly installed on the circumferential step of the tank body A and extends radially outward from 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 circumferentially and uniformly 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 guide ribs, 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 guide ribs 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 pressure plate of the storage tank, so as to open or close the discharge port A of the storage tank. A circumferential 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 circumferentially and uniformly distributed between the upper sealing plate and the lower adsorption plate around the circumferential 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 push plate and an upper annular plate fixedly connected in sequence from bottom to top; a circumferential boss Y for accommodating the spring is provided in the central area of the upper end surface of the lower push plate. A plurality of guide grooves X are provided on the upper end surface of the lower push plate and are circumferentially and uniformly distributed around the circumferential boss Y. The upper annular plate is arranged at the upper end of the circumferential boss Y and extends radially outward from the circumferential boss Y; an annular open area is provided between the outer side of the circumferential boss Y, the lower end of the upper annular plate, and the upper end of the lower push plate of the lower seat body; the lower seat body is movably inserted into the lower open end of the circumferential boss X of the upper seat body through the upper open end of the circumferential boss Y, so that the circumferential boss X of the upper seat body is internally communicated with the circumferential 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 its elastic force, thereby driving the L-shaped rocker to rotate towards the inside 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 outside 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; 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, 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 arranged inside the tank body B, a discharge port B is arranged at the bottom of the tank body B, and only one feed port is arranged at the top of the tank body B; the upper sealing cover is detachably installed on the 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 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 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 arranged 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 which are annularly and evenly distributed around the lead screw B are arranged 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 arranged on the inner side thereof, 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 vibration motor is fixedly installed on the upper side wall of the tank body B.

5. The automatic feeding method for radioactive powder materials as described in claim 4, characterized in that: 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 annularly and evenly distributed together on the top of the tank body B of the transfer tank. A filter element for filtering radioactive dust is arranged 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 main pipe 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, and a ball valve for controlling the on-off of the air flow is arranged on the main air outlet; the number of the branch pipes is the same as the number of the 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, 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; 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 guide rollers arranged horizontally. All the guide rollers together enclose a plurality of rectangular areas, and the rectangular area is the placement station B. The vehicle body A is provided with a material dropping hole A in each placement station 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 extends and retracts, it drives the vehicle body A to make a horizontal reciprocating linear movement along the horizontal track A; the storage tank translation trolley is installed on the horizontal track A by rolling the rollers B; 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 material dropping 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 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 a layer of 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 its top is provided with a central hole B, and an electromagnet placement cavity communicating with the central hole B is arranged 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 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 from 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 to 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, so as to facilitate the storage tank outer cover disassembly and assembly device to disassemble the outer protective cover of the storage tank; 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, 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 storage tank outer cover disassembly and assembly device to install the outer protective cover of the storage tank; The inner cover opening and closing device 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. Multiple 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 directly below the docking plate 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 A of the storage tank. 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 makes a horizontal rotation under the drive of the rotary drive motor A. A plurality of rollers arranged horizontally and parallel to each other 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. One end of the conveying direction of the rolling conveying surface A is the inlet and outlet A; the limit frame is fixedly installed on the upper turntable and is located at the other end of the conveying direction of the rolling conveying surface A. 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 conveying direction of the rolling conveying surface A. Each column of first guide rollers is composed of multiple first guide rollers arranged vertically and horizontally in a 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 and outlet A, the two columns 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 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. 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 make a 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 assemble the upper sealing cover of the transfer tank. The lower pipeline docking device includes support A, the middle pipeline, the upper movable pipeline, the lower movable pipeline, linear motor A, linear motor B, connecting rod A and connecting rod B; support A is fixedly installed on the overhead slide; the middle pipeline is fixedly installed on support 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. Two relatively arranged third hinge parts are provided on the outer wall of the upper end of the upper movable pipeline, and two relatively arranged fourth hinge parts are provided 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 support A, guide rail A is horizontally installed on base A, and slider A is slidably installed on guide rail A. The number of linear motor A is two, and the two linear motor 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 support A, guide rail B is horizontally installed on base B, and slider B is slidably installed on guide rail B. The number of linear motor B is two, and the two linear motor 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 slider A of the two linear motor 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 slider B of the two linear motor 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 inlet 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.

6. The automatic feeding method for radioactive powder materials according to claim 5, characterized in that: The transfer tank translation trolley includes a vehicle body B and a limit component; at the lower end of the vehicle body B, there are driving wheels B, and at the upper end of the vehicle body B, there are multiple rollers arranged 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. Above all the rollers, a rolling conveying surface B is formed. One end of the rolling conveying surface B in the conveying direction is the inlet / outlet B. Between the two middle rows of rollers, a first avoidance area and a second avoidance area are formed. 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; at the center of the upper end of the vehicle body B, there is a vacant area not covered by the rollers, and in the vacant area of the vehicle body B, there is a blanking hole B; 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 consists 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 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 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; in the moving path of the transfer tank translation trolley, there are a tank transfer position and a feeding position; 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 opening 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; 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 three - 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 three - layer space and enters the two - layer space, and the upper end of the docking pipe extends into the three - 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 three - 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 along 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 and 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 arranged 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 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 B of the transfer tank.

7. The automatic feeding method for radioactive powder materials as described in claim 6, characterized in that: The automatic feeding system for radioactive powder materials 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 for transferring the transfer tank to the placement station A of the transfer tank rotating device.

8. The automatic feeding method for radioactive powder materials as described in claim 7, characterized in that: Before implementing the feeding method, each component in the automatic feeding system for radioactive powder materials is in an initial state. In the initial state: a. The inner seal cover A of the storage tank fits against the discharge port A of the storage tank to close the discharge port A, and the outer protective cover of the storage tank is installed outside the discharge port A of the storage tank; b. The inner seal cover A of the transfer tank fits against the discharge port B to close the discharge port B; c. The electric push rod B and the traction electromagnet in the outer cover disassembly and assembly device of the storage tank move to the lower limit positions respectively to avoid interference with the storage tank; d. The docking plate 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; e. The electromagnetic chuck 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; f. The upper movable pipe in the lower pipeline 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 is at the upper end of its moving stroke to avoid interference with the transfer tank on the transfer tank rotating device; g. The ball valve in the negative pressure dust removal device is in the closed state; h. The transfer tank translation trolley moves to the tank transfer position to make preparations for receiving the transfer tank; the front limit plate and the rear limit plate on the transfer tank translation trolley both retract below the rolling conveyor surface B; i. The docking pipe in the upper pipeline docking device is in the lower limit position to avoid interference with the transfer tank translation trolley; the cover plate covers the upper port of the docking pipe in the lower limit position; j. The plug-in plate in the inner cover opening and closing 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 translation trolley; The detailed expansion of steps S01 - S06 and step M is as follows: S01. Place the storage tank and the transfer tank respectively: a. Operate the jib crane to lift and place a group of storage tanks into the placement station B of the storage tank translation trolley respectively. One storage tank is placed in each placement station B. During the process of lifting the storage tank to the placement station B, the guide rollers on the four sides of the placement station B guide, correct the deviation and center the storage tank; b. Operate the jib crane to lift a transfer tank onto the third conveyor belt. The rotation drive motor A of the transfer tank rotating device is started to drive the upper turntable to rotate, so that the inlet and outlet A of the transfer tank rotating device are facing the third conveyor belt; c. The third conveyor belt starts and drives the transfer tank placed on it to move in the direction close to the inlet and outlet A of the transfer tank rotating device. After the transfer tank enters the rolling conveyor surface A through the inlet and outlet A, it is driven by the rollers to move in the direction close to the limit frame. During the movement, the two rows of first guide rollers are respectively in contact with the two surfaces on the guide section 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 on the limit frame, the transfer tank is locked in the placement station A of the transfer tank rotating device; S02. Remove the outer protective cover of the storage tank: a. The storage tank translation trolley drives the target storage tank to move to the fourth docking position so that the lower adsorption plate of the outer protective cover is directly above the annular electromagnet, and the lower push plate of the outer protective cover is directly above the traction electromagnet; b. The electric push rod B of the outer cover disassembly and assembly device of the storage tank rises, driving the annular electromagnet to move upward. When the annular electromagnet contacts the lower adsorption plate, the annular electromagnet is energized to attract the lower adsorption plate. Then, the traction electromagnet rises. After contacting the lower push plate, it overcomes the spring force to push the lower push plate upward, driving the L-shaped rocker to rotate outward around its hinge point relative to the storage tank, so that the hook part of the L-shaped rocker disengages from the upper end surface of the upper pressure plate, thus unlocking the outer protective cover from the target storage tank. c. The traction electromagnet of the outer cover disassembly and assembly device of the storage tank is energized to attract the lower push plate, so that the L-shaped rocker maintains its current posture. Then, the electric push rod B descends, driving the outer protective cover to move downward, so that the outer protective cover completely disengages from the target storage tank. d. Repeat steps a to c to sequentially remove the outer protective covers of the storage tanks in all placement stations B of the storage tank translation trolley. S03. Multiple storage tanks are sequentially fed into the transfer tank: a. The rotation drive motor A in the transfer tank rotation device is started, driving the transfer tank placed in the placement station A to rotate to the first docking position, so that 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. b. The storage tank translation trolley drives the target storage tank to move to the fifth docking position, so that the discharge port A of the storage tank is directly above the upper movable pipe of the lower pipeline docking device. c. The lifting drive device B of the upper cover disassembly and assembly device of the transfer tank descends, driving the electromagnetic chuck to descend. When the electromagnetic chuck contacts the target upper sealing cover of the transfer tank, the electromagnetic chuck is energized to attract the target upper sealing cover. Then, the lifting drive device B rises, driving the electromagnetic chuck and the upper sealing cover to move upward, thus removing the target upper sealing cover from the target feed port of the transfer tank, so that the target feed port of the transfer tank is exposed. d. The rotation drive motor A of the transfer tank rotation device is started, driving the transfer tank placed in the placement station A to rotate to the second docking position, so that the target feed port of the transfer tank is directly below the lower movable pipe of the lower pipeline docking device. e. The two linear motors A of the lower pipeline docking device act synchronously. Respectively through the transmission of the connecting rod A, they drive the upper movable pipe to move upward, so that the upper port of the upper movable pipe is docked with the discharge port A of the target storage tank. The two linear motors B of the lower pipeline docking device act synchronously. Respectively through the transmission of the connecting rod B, they drive the lower movable pipe to move downward, so that the lower port of the lower movable pipe is docked with the target feed port of the transfer tank. f. The rotation drive motor B of the inner lid opening and closing device of the storage tank starts, driving the docking plate to rotate a certain angle so that the finger rod of the docking plate is aligned with the jack A of the operation panel A of the target storage tank. At the same time, the lifting drive device A starts, driving the docking plate to move downward so that the finger rod of the docking plate is inserted into the jack A of the operation panel A of the target storage tank. Then, the rotation drive motor B of the inner lid opening and closing device of the storage tank starts, driving the docking plate to rotate, driving the operation panel A and the lead screw A of the target storage tank to rotate, and further driving the nut A to move downward along the lead screw A. The nut A drives the inner sealing cover A to move downward through the inner sleeve A and the extension rod A, so that the inner sealing cover A disengages from the discharge port A of the target storage tank, thereby forming an annular gap for the powder material to fall. The powder material in the inner cavity A of the target storage tank then falls through the annular gap, and then successively passes through the upper movable pipeline, the middle pipeline, the lower movable pipeline, and enters the inner cavity B of the transfer tank through the target feed port of the transfer tank; 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 A in the lower pipeline docking device act synchronously, respectively driving the upper movable pipeline to move downward through the transmission of the connecting rod A to avoid interfering with the subsequent movement of the storage tank translation trolley; 2. The two linear motors B in the lower pipeline docking device act synchronously, respectively driving the lower movable pipeline to move upward through the transmission of the connecting rod B to avoid interfering with the subsequent rotation of the transfer tank located on the transfer tank rotating device; 3. The rotation drive motor B in the inner lid opening and closing device of the storage tank starts, driving the docking plate to rotate, driving the operation panel A and the lead screw A of the target storage tank to rotate, and further driving the nut A to move downward along the lead screw A. The nut A drives the inner sealing cover A to move downward through the inner sleeve A and the extension rod A, so that the inner sealing cover A fits and closes the discharge port A of the target storage tank. Then, the lifting drive device A starts, driving the docking plate to move upward so that the finger rod of the docking plate withdraws from the jack A of the operation panel A of the target storage tank; h. The rotation drive motor A of the transfer tank rotating device starts, driving the transfer tank in the placement station A to rotate to the first docking position, so that the target feed port of the transfer tank rotates to directly below the electromagnetic chuck of the transfer tank upper cover disassembly and assembly device; i. The lifting drive device B of the transfer tank upper cover disassembly and assembly device descends, driving the electromagnetic chuck to descend, and stuffing the target upper sealing cover adsorbed on the electromagnetic chuck into the target feed port of the transfer tank. The electromagnetic chuck is powered off to release the adsorption state with the target upper sealing cover. The lifting drive device B ascends, driving the electromagnetic chuck to ascend to avoid interfering with the subsequent rotation of the transfer tank located on the transfer tank rotating device; j. Repeat steps a to i to sequentially dock and feed other storage tanks on the storage tank translation trolley with the transfer tank, and ensure that all the feed ports on the transfer tank correspond one by one with all the storage tanks on the storage tank translation trolley; In this step, in sub-step f, during the process of the storage tank starting to discharge the powder material until the powder material in the storage tank is completely discharged, start the vibration motor, open the ball valve in the negative pressure dust removal device, start the negative pressure fan, and the negative pressure is conducted to the filter unit in sequence through the negative pressure fan, hose, main pipe and branch pipe. All the filter units jointly suck the dust in the upper part of the inner cavity B of the transfer tank. The dust is intercepted in the filter unit, and the filtered air is discharged into the external environment through the branch pipe, main pipe, hose and negative pressure fan in sequence; In this step, when sub-step f ends and before sub-step g starts, after all the storage tanks on the transfer tank trolley for waiting material are filled, first turn off the negative pressure fan and the vibration motor, then close the ball valve at the total air outlet of the main pipe, and finally disconnect the connection between the hose and the total air outlet of the main pipe; In this step, the rotating device of the transfer tank should avoid driving the transfer tank to always rotate in one direction, so as to prevent the hose from being wound around the transfer tank; S04, Transfer the transfer tank to the transfer tank trolley for waiting material: a. The rotating drive motor A of the transfer tank rotating device is started to drive the upper turntable to rotate, so that the inlet and outlet A of the transfer tank rotating device are directly opposite to the first conveyor belt; then, the limit electromagnet is powered off to release the locking state of the transfer tank in the placement station A; then, the transfer tank is driven by the rollers to move towards the direction close to the inlet and outlet A. During the movement, the two rows of first guiding rollers are respectively in contact with the two surfaces on the guiding section 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 A to the outside of the transfer tank rotating device; b. After the transfer tank is discharged to the outside of the transfer tank rotating device, it passes through the first conveyor belt, transfer elevator, second conveyor belt and the inlet and outlet B of the transfer tank trolley for waiting material in sequence, and enters the rolling conveying surface B of the transfer tank trolley for waiting material; c. The rollers on the transfer tank trolley for waiting material are started to drive the transfer tank to move to the central area of the rolling conveying surface B. During the movement, the two rows of second guiding rollers are respectively in contact with the two surfaces on the guiding section of the transfer tank, playing a role in limiting the movement path of the transfer tank; after the transfer tank moves to the central area of the rolling conveying surface B, the rollers stop running, and the front cylinder and the rear cylinder are respectively started to drive the front limit plate and the rear limit plate to extend above the rolling conveying surface B, so that the front limit plate and the rear limit plate are respectively abutted against the other two surfaces on the guiding section of the transfer tank, thereby locking the transfer tank in the placement station C of the transfer tank trolley for waiting material; S05, Transfer the transfer tank into the transfer bin: a. The rotating drive motor D of the upper pipeline docking device is started, and the cover plate is driven to rotate through the second extension rod to open the upper port of the docking pipe in the lower limit position; the transfer tank trolley for waiting material 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 directly opposite up and down; then, the lifting drive device C of the upper pipeline docking device is started to drive the docking pipe to rise from the lower limit position to the upper limit position, so that the discharge port B of the transfer tank is included in the upper port of the docking pipe. At this time, the lower port of the docking pipe is still inserted into the feeding port of the transfer bin; b. The rotary drive motor C of the transfer tank inner cover opening and closing device is started, driving the plug-in disk to rotate a certain angle, so that the plug-in rod at the lower end of the plug-in disk is directly opposite to the socket B in the operating disk B of the transfer tank; then, the lifting drive device C is started, driving the plug-in disk to move downward, so that the plug-in rod at the lower end of the plug-in disk is inserted into the socket B of the operating disk B of the transfer tank; then, the rotary drive motor C is started, driving the plug-in disk to rotate, driving the operating disk B and the screw rod B of the transfer tank to rotate, and then driving the nut B to move downward along the screw rod B, and the nut B drives the inner sealing cover B to move downward through the inner sleeve B and the extension rod B, so that the inner sealing cover B is separated from the discharge port B of the transfer tank, thereby forming an annular gap for the powder material to fall; the powder material in the inner cavity B of the transfer tank then falls through the annular gap, and then enters the interior of the transfer silo through the docking pipe and the feed port in turn; c. After the powder material in the transfer tank is completely discharged, the two linear motors A in the lower pipe docking device act synchronously, and drive the upper movable pipe downward through the transmission of the connecting rod A to avoid interference with the subsequent movement of the storage tank translation trolley; d. The rotary drive motor C in the transfer tank inner cover opening and closing device starts, drives the plug-in plate to rotate, drives the transfer tank's operating plate B and screw B to rotate, and then drives the nut B to move upward along the screw B. The nut B drives the inner sealing cover B to move upward through the inner sleeve B and the extension rod B, so that the inner sealing cover B fits the discharge port B of the transfer tank, thereby closing the discharge port B of the transfer tank; then, the lifting drive device C starts, drives the plug-in plate to move upward, and makes the plug rod at the lower end of the plug-in plate withdraw from the socket B of the transfer tank's operating plate B; at this point, the feeding operation is completed; In this step, the upper end of the transfer silo is equipped with a negative pressure suction port, which is connected to an external negative pressure source. When the powder material enters the transfer silo, the external negative pressure source is immediately started to perform a negative pressure dust removal operation on the upper end of the transfer silo to prevent the powder material from floating out from the feed inlet; S06, Recycling of empty transfer tanks: a. The front cylinder and the rear cylinder on the transfer tank translation trolley are started respectively, driving the front limit plate and the rear limit plate to retract to the bottom of the rolling conveying surface B, so that the front limit plate and the rear limit plate are separated from the two surfaces on the guide section of the transfer tank, thereby releasing the locking state of the transfer tank in the placement station C; b. The transfer tank translation trolley drives the transfer tank from the feeding position to the tank transfer position, so that the inlet and outlet B of the transfer tank translation trolley is close to the second conveyor belt; then, the rollers on the transfer tank translation trolley start to drive the transfer tank to move in the direction close to the inlet and outlet B. During the movement, the two rows of second guide rollers contact the two surfaces on the guide section of the transfer tank respectively, which plays a role in limiting the movement path of the transfer tank until the transfer tank is discharged from the inlet and outlet B to the outside of the transfer tank translation trolley; c. After the transfer tank is discharged to the outside of the transfer tank rotating device, it passes through the second conveyor belt, the transfer elevator, the first conveyor belt, the inlet and outlet A 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 the cantilever crane, and the recovery of the transfer tank is completed; M, install the outer protective cover of the storage tank: a. The storage tank translation trolley drives the target storage tank with the outer protective cover removed to move to the fourth docking position. Since the upper end of the storage tank outer cover disassembly and assembly device is connected to the outer protective cover, the upper sealing plate of the outer protective cover is located directly below the upper pressure plate of the storage tank; b. The electric push rod B of the storage tank outer cover disassembly and assembly device rises, driving the outer protective cover to move upward. When the upper sealing plate of the outer protective cover fits the upper pressure plate of the storage tank, the discharge port A of the storage tank is closed; then, the traction electromagnet descends, thereby driving the lower push plate to move downward, and then driving the L-shaped rocker to rotate around its hinge toward the inside of the storage tank, so that the hook part of the L-shaped rocker rests on the upper end surface of the upper pressure plate; c. The traction electromagnet and the annular electromagnet of the storage tank outer cover disassembly and assembly device are powered off, so that the traction electromagnet releases the adsorption state with the lower push plate, and the annular electromagnet releases the adsorption state with the lower adsorption plate; then, the electric push rod B descends, so that the outer protective cover is completely separated from the storage tank outer cover disassembly and assembly device, and the lower seat body has a tendency to move downward based on the elastic force of the spring, thereby driving the L-shaped rocker to have a tendency to rotate around its hinge point toward the inside of the storage tank, and then the hook portion of the L-shaped rocker is pressed tightly against the upper end surface of the upper pressing plate. At this point, the outer protective cover has been installed on the target storage tank; d. Repeat steps a to c to install outer protective covers on all the storage tanks on the storage tank translation trolley in turn.

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