Pneumatic conveying radioactive powder material feeding system

Abstract

The invention discloses a pneumatic conveying type radioactive powder feeding system, comprising a storage tank, an outer cover disassembly and assembly device, a pipe docking device, a transfer tank, and a pneumatic conveying assembly. The storage tank is provided with an outer protective cover on the outside of a discharge port A. The outer cover disassembly and assembly device is used to remove or install the outer protective cover. The pipe docking device docks or separates with the discharge port A at the upper end. A dust filter is provided in the inner cavity B of the transfer tank, which divides the inner cavity B into an upper cavity and a lower cavity from top to bottom. The pneumatic conveying assembly comprises a vacuum pump, an exhaust pipe, a conveying pipe, and a discharge pipe. The air inlet of the conveying pipe is connected to the atmosphere, the powder inlet of the conveying pipe is connected to the lower end of the pipe docking device, and the gas-powder mixing outlet of the conveying pipe is connected to the transfer tank. The invention is used for the feeding operation of UO2 powder in the uranium conversion process, solving the problems of the existing uranium conversion material feeding system, which has a complex structure, high configuration cost, and difficulty in coordination and connection between the various transfer components.

Description

Technical Field

[0001] The invention relates to the technical field of uranium conversion related equipment, in particular to a gas-transported radioactive powder material feeding system. Background Art

[0002] Uranium ore is the primary raw material for nuclear fuel production. The entire nuclear fuel production process involves two steps: uranium purification and uranium conversion. Uranium purification refers to the production of refined UO₂ from uranium ore concentrate. Uranium conversion refers to the production of UF₆ from refined UO₂.

[0003] The UO2 powder produced during the uranium purification step is stored in specialized storage tanks for future use. These tanks have a discharge port at their lower ends for easy feeding. During the uranium conversion step, the UO2 powder from the multiple storage tanks must be discharged into a transfer silo. This operation is known as UO2 feeding.

[0004] The invention patent with publication number CN115465685A discloses a multi-round continuous feeding system and feeding method for uranium conversion materials, which realizes the automatic feeding of UO2 powder materials in the uranium conversion process. The feeding system merges multiple storage tanks on the first floor of the factory building and feeds them into a transfer tank, then transports the transfer tank to the third floor of the factory building through a set conveying path, and finally feeds the materials into the transfer silo (located on the second floor of the factory building) at a fixed point.

[0005] The above-mentioned feeding system has the following shortcomings: 1. The types and quantities of transfer components involved in the transfer tank transportation path are large, including the transfer tank rotating device, transfer elevator, transfer tank carrying trolley and multiple conveyor belts, which leads to a high configuration cost of the feeding system; 2. The transportation path of the transfer tank is long and tortuous, involving horizontal steering and posture adjustment, horizontal movement, and vertical lifting. Various transfer components need to be coordinated and connected, which makes control difficult. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a pneumatic conveying type radioactive powder material feeding system, which solves the problems of the existing uranium conversion material feeding system having a complex structure, high configuration cost, and difficulty in coordination and connection between various transfer components.

[0007] The technical solution of the present invention is: a pneumatic conveying type radioactive powder material feeding system, comprising a plant, a storage tank, an outer cover disassembly and assembly device, a pipeline docking device, an inner cover opening and closing device, a transport trolley, a transfer tank and a pneumatic conveying component;

[0008] The factory building is divided into three layers from bottom to top: the first layer is equipped with an overhead slide, which is equipped with a horizontal track. The horizontal track includes an outer cover disassembly section and a material discharging and docking section. The second layer is equipped with a transfer silo, and the upper end of the transfer silo is equipped with a feed port A.

[0009] The storage tank is provided with an inner cavity A, a discharge port A is provided at the bottom of the storage tank, and the storage tank is provided with an inner sealing cover and an outer protective cover on the inner and outer sides of the discharge port A respectively;

[0010] The outer cover disassembly and assembly device is located just below the outer cover disassembly and assembly section, and is used to remove or install the outer protective cover of the storage tank;

[0011] The pipe docking device is located just below the discharge docking section, and its upper end is docked or separated with the discharge port A of the storage tank;

[0012] The inner cover opening and closing device is located just above the outer cover disassembly section, and is used to control the movement of the inner sealing cover of the storage tank, thereby opening or closing the discharge port A of the storage tank;

[0013] The transport trolley can be movably mounted on a horizontal track, on which a placement station for positioning the storage tank is provided;

[0014] The transfer tank is located on the third floor of the factory building. An inner cavity B is provided inside the transfer tank. A dust filter is installed in the inner cavity B. The dust filter separates the inner cavity B into an upper cavity and a lower cavity from top to bottom. A discharge port B connected to the lower cavity is provided at the bottom of the transfer tank. A negative pressure port connected to the upper cavity is provided at the top of the transfer tank. A pulse backflush device connected to the upper cavity and a feed port B connected to the lower cavity are provided on the outer wall of the transfer tank.

[0015] The air conveying assembly includes a vacuum pump, an exhaust pipe, a conveying pipe and a discharge pipe; the vacuum pump is provided with an air inlet and an air outlet, and the air outlet of the vacuum pump is connected to the atmosphere; one end of the exhaust pipe is connected to the negative pressure port of the transfer tank, and the other end is connected to the air inlet of the vacuum pump; both ends of the conveying pipe are respectively provided with an air inlet and an air-powder mixing outlet, and the conveying pipe is provided with a powder inlet between the air inlet and the air-powder mixing outlet, the air inlet is connected to the atmosphere, the powder inlet is connected to the lower end of the pipeline docking device, and the air-powder mixing outlet is connected to the feed port B of the transfer tank; a valve A is provided at the air-powder mixing outlet, and a valve B is provided at the powder inlet; the discharge pipe is connected between the discharge port B of the transfer tank and the feed port A of the transfer silo.

[0016] A further technical solution of the present invention is: the storage tank includes a tank body, an operating panel, an inner sealing cover and an outer protective cover; a bottom plate is welded on both sides of the lower end of the tank body, and the bottom plate is provided with a guide edge on the side relatively close to the outside of the tank body, the tank body is provided with the inner cavity A, the tank body is provided with the discharge port A at the bottom, the tank body is fixedly installed with an inner fixing sleeve on the outer wall of the lower end, and the outer wall of the inner fixing sleeve is provided with a sealing ring groove and a ball receiving groove in sequence from top to bottom; the operating panel is provided at the upper end of the outer side of the tank body; the inner sealing cover is provided on the inner side of the discharge port A and is associated with the operating panel, and the inner sealing cover As the operating disk rotates, it moves vertically up and down, thereby opening or closing the discharge port A; the outer protective cover is movably installed on the outside of the discharge port A, and the outer protective cover includes an outer movable sleeve, a sealing ring and a locking assembly; the outer movable sleeve includes an outer vertical ring section, an inner vertical ring section, an upper circular sealing plate, a lower outer ring plate and a lower inner ring plate; the outer vertical ring section and the inner vertical ring section are coaxial and arranged vertically, the inner vertical ring section is located on the inner side of the outer vertical ring section, and a plurality of through holes are provided on the outer vertical ring section at intervals of one circle along the radial direction; the upper circular sealing plate is welded to the upper port of the inner vertical ring section; the lower outer ring plate is welded to the outer vertical ring section and the inner vertical ring section The lower end of the segment; the lower inner ring plate is fixedly connected to the inner side of the lower outer ring plate; the lower inner ring plate, the inner vertical ring segment and the upper circular sealing plate are combined to form a hook finger receiving groove; the sealing ring is installed in the sealing ring groove of the inner fixed sleeve; the number of locking components is consistent with the number of through holes of the outer vertical ring segment, and the locking components correspond to the through holes of the outer vertical ring segment one by one; the locking component includes a sleeve, ball A, a spring and a plug; one end of the sleeve is welded to the through hole of the outer vertical ring segment and contains the through hole of the outer vertical ring segment, and the other end of the sleeve extends radially outward of the outer vertical ring segment; ball A The spring and the plug are installed in the inner hole of the sleeve from the inside to the outside in sequence, and the two ends of the spring are respectively against the plug and the ball A. The spring forces a part of the ball A to extend out from the through hole of the outer vertical ring section through the elastic force; when the outer protective cover is installed on the outside of the discharge port A, the outer movable sleeve is sleeved on the lower end of the outer wall of the inner fixed sleeve through the outer vertical ring section and closes the discharge port A. The outer movable sleeve and the inner fixed sleeve are sealed by a sealing ring, and the ball A of the locking assembly is embedded in the ball receiving groove of the inner fixed sleeve, thereby realizing axial limitation between the inner fixed sleeve and the outer movable sleeve.

[0017] A further technical solution of the present invention is that a fourth conical surface is provided at the upper end of the outer vertical ring section of the outer protective cover, and correspondingly, a third conical surface is provided at the lower end of the inner fixing sleeve of the tank body for cooperating with the fourth conical surface.

[0018] A further technical solution of the present invention is: the outer cover disassembly and assembly device includes an electric lifting platform, an automatic centering support assembly and a hook action drive assembly; the lower end of the electric lifting platform is directly or indirectly fixedly installed on the ground of a space, and the upper end of the electric lifting platform is provided with a bearing platform; the automatic centering support assembly includes a supporting shell, a ball socket A, a ball B, a docking shell and a limit rod; the lower end of the supporting shell is fixedly installed on the bearing platform, an inner cavity C is provided inside the supporting shell, and a through-rod hole connected to the inner cavity C is provided on the top of the supporting shell; a plurality of ball sockets A are fixedly installed on the top of the supporting shell; the ball B is rotatably installed in the ball socket A, and the ball B corresponds to the ball socket A one-to-one, and the upper ends of all balls B are on the same horizontal plane; an inner cavity D is provided inside the docking shell, and an action avoidance groove connected to the inner cavity D is provided on the top of the docking shell, and the lower end of the docking shell is supported by all balls B; the upper end of the limit rod is fixedly connected to the lower end of the docking shell, and the lower end of the limit rod passes through the supporting shell. The screw rod is arranged horizontally, and is provided with a first thread segment and a second thread segment with opposite thread rotation directions. One end of the screw rod is directly or indirectly supported on the docking shell, and the other end is connected to the shaft of the motor A; the nut A and the nut B are respectively threadedly connected to the first thread segment and the second thread segment of the screw rod, and the two hooks are arranged back to back and fixedly connected to the upper ends of the nut A and the nut B, and both extend from the action avoidance groove of the docking shell; when the outer cover disassembly and assembly device is docked with the outer protective cover, the two hooks move back to back to the extreme position and respectively resist the hook finger accommodating groove; when the outer cover disassembly and assembly device is separated from the outer protective cover, the two hooks move toward each other to the extreme position and both exit the hook finger accommodating groove.

[0019] A further technical solution of the present invention is that a first conical surface is provided at the inner edge of the lower inner ring plate of the outer protective cover, and correspondingly, a second conical surface is provided at the upper end of the docking shell of the outer cover disassembly and assembly device for cooperating with the first conical surface.

[0020] A further technical solution of the present invention is that the pipeline docking device includes an electric lifting device, an automatic centering support assembly and a docking pipe assembly; the lower end of the electric lifting device is directly or indirectly fixedly installed on the ground of a space of one floor, and the upper end of the electric lifting device is provided with a load-bearing platform, which includes a vertical sleeve and a horizontal ring plate welded on the outer circumference of the vertical sleeve, and a pipe hole A is provided inside the vertical sleeve; the automatic centering support assembly includes a support shell, a ball socket B and a ball C; the lower end of the support shell is fixedly installed on the horizontal ring plate of the load-bearing platform, the interior of the support shell is provided with an inner cavity E, and the top of the support shell is provided with a pipe hole B connected to the inner cavity E, and the pipe hole B of the support shell is arranged opposite to the pipe hole A of the load-bearing platform and contains the pipe hole A therein; a plurality of ball sockets B are fixedly installed on the upper end of the horizontal ring plate of the load-bearing platform and are located in the inner cavity E of the support shell; the ball C is rotatably installed in the ball socket B, and the ball C corresponds to the ball socket B one by one. The upper ends of all balls C are on the same horizontal plane; the docking tube assembly includes an upper rigid tube, a bellows and a lower rigid tube; a radial ring plate is welded on the outer circumferential surface of the upper rigid tube, the upper port of the upper rigid tube is used to dock or separate with the inner fixed sleeve, and the lower port of the upper rigid tube is fixedly connected to the upper port of the bellows; the upper rigid tube passes through the pipe hole A on the load-bearing platform and the pipe hole B on the top of the supporting shell. It is supported on all balls C through the radial ring plate, and a movable gap is provided between its outer circumferential surface and the pipe hole A on the load-bearing platform; the upper end of the bellows is sleeved and fixed on the lower end of the outer circumferential surface of the vertical sleeve of the load-bearing platform, and the lower end of the bellows is sleeved and fixed on the upper end of the outer circumferential surface of the lower rigid tube; the lower port of the lower rigid tube is fixedly connected to the powder inlet of the conveying pipe; the pipeline docking device is docked or separated with the inner fixed sleeve of the storage tank through the upper port of the upper rigid tube, and the pipeline docking device is fixedly connected to the powder inlet of the conveying pipe of the air conveying assembly through the lower port of the lower rigid tube.

[0021] A further technical solution of the present invention is that a fifth conical surface is provided at the upper end of the upper rigid pipe of the pipeline docking device, and correspondingly, a third conical surface for matching with the fifth conical surface is provided at the lower end of the inner fixed sleeve of the tank body.

[0022] A further technical solution of the present invention is: the carrying trolley includes a car body and a car body movement drive assembly; rollers are provided at the lower end of the car body, and multiple groups of guide wheels are provided at the upper end of the car body, each group of guide wheels includes at least two guide wheels with horizontally arranged rotating shafts, all guide wheels included in a group of guide wheels are arranged in a row, and each group of guide wheels encloses one or more U-shaped areas, and the U-shaped area is the placement station, and a blanking hole for the upper rigid tube to extend into or exit is provided at the center of the placement station; the car body is installed on the horizontal track through rollers; the car body movement drive assembly includes a motor B, a gear and a rack; the motor B is fixedly installed on the car body; the gear is fixedly installed on the shaft of the motor B; the rack is directly or indirectly fixedly installed on the overhead slide, and is arranged parallel to the horizontal track, and the rack and the gear are engaged with each other.

[0023] A further technical solution of the present invention is: the vehicle body is provided with a guide plate in each placement station, the height of the guide plate is lower than the height of the guide wheel, the guide plate includes the blanking hole in the placement station, and the inside of the guide plate is provided with multiple slope surfaces connected in sequence, so that the size of the inside of the guide plate gradually decreases from top to bottom; the guide plate contacts the guide edge of the storage tank through the slope surface, thereby realizing the guidance of the storage tank.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. It is used for feeding UO2 powder in the uranium conversion process. The storage tank is removed from the first floor of the plant and fed into the delivery pipeline. The negative pressure provided by the vacuum pump drives the powder through the pipeline and discharges it into the transfer tank on the third floor of the plant. This pneumatic conveying method significantly simplifies the feeding process and reduces the system complexity compared to existing tank-based conveying methods.

[0026] 2. Since the conveying process does not involve the transfer operation of the storage tank between multiple transfer components (specifically: during the entire conveying process, the storage tank only needs to be hoisted on the transport trolley and does not need to be subsequently transferred to other transfer components), and the operations requiring the coordination and connection of multiple components are relatively few (specifically: only three operations are included: docking the pipeline docking device with the storage tank discharge port A, docking the outer cover disassembly and assembly device with the storage tank outer protective cover, and docking the inner cover opening and closing device with the storage tank operating panel), the difficulty of the system's electronic control design is reduced, and the reliability and controllability of the system are improved.

[0027] 3. In the feeding process, only the removal of the outer protective cover and the pipe docking operations involve the coordination / connection of two components. Therefore, multiple structures are specifically designed to reduce the docking accuracy requirements. When removing the outer protective cover: the structure in which the first conical surface at the inner edge of the lower inner ring plate of the outer protective cover cooperates with the second conical surface at the upper end of the docking shell of the outer cover disassembly and assembly device, and the adjustment gap provided by the automatic centering support assembly of the outer cover disassembly and assembly device, together play the role of centering and correcting deviation. When installing the outer protective cover: the structure in which the third conical surface at the lower end of the inner fixed sleeve of the storage tank cooperates with the fourth conical surface at the upper end of the outer vertical ring section of the outer protective cover, and the adjustment gap provided by the automatic centering support assembly of the outer cover disassembly and assembly device, together play the role of centering and correcting deviation. When docking the conveying pipe: the structure in which the third conical surface at the lower end of the storage tank cooperates with the fifth conical surface at the upper end of the pipe docking device, and the movable gap between the upper rigid pipe and the load-bearing platform, together play the role of centering and correcting deviation.

[0028] The present invention is further described below with reference to the figures and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention;

[0030] Figure 2 This is the appearance of the storage tank;

[0031] Figure 3 A diagram showing the outer cover disassembly and assembly device in a working state from one viewing angle;

[0032] Figure 4 A diagram showing the outer cover disassembly and assembly device in working condition from another perspective;

[0033] Figure 5 for Figure 3 A magnified view of part A;

[0034] Figure 6 for Figure 4 A magnified view of part B;

[0035] Figure 7 This is the appearance diagram of the transport vehicle;

[0036] Figure 8 It is a structural diagram of the pipeline docking device;

[0037] Figure 9 This is the appearance of the transfer tank;

[0038] Figure 10 It is a structural diagram of the gas conveying component;

[0039] Figure 11 for Figure 10 Magnified view of part C;

[0040] Figure 12 This is the appearance diagram of the pipeline docking device;

[0041] Figure 13 This is the appearance diagram of the device with the outer cover removed.

[0042] Legend: overhead slide 11; horizontal track 12; transfer silo 13; feed port A131; storage tank 2; tank body 21; bottom plate 211; guide edge 2111; discharge port A213; inner fixing sleeve 215; third conical surface 2151; operating panel 22; outer vertical ring section 251; inner vertical ring section 252; upper circular sealing plate 253; lower outer ring plate 254; lower inner ring plate 255; first conical surface 2551; hook finger receiving groove 256; sealing ring 26; sleeve 271; ball A272; spring 273; plug 274; electric lifting platform 31; carrying platform 311; support shell 321; ball socket A322; ball B323; docking shell 324; action avoidance groove 3241; second conical surface 3242; limit rod 325; electric Machine A331; screw rod 332; nut A333; nut B334; hook 335; electric lifting device 41; vertical sleeve 411; horizontal ring plate 412; pipe hole A413; support shell 421; ball socket B422; ball C423; upper rigid tube 431; radial ring plate 4311; bellows 432; lower rigid tube 433; fifth cone 4311; inner cover opening and closing device 5; car body 61; roller 62; guide wheel 63; drop hole 64; motor B65; guide plate 66; transfer tank 7; discharge port B72; negative pressure port 73; pulse backflush device 74; feed port B75; vacuum pump 81; exhaust pipe 82; conveying pipe 83; air inlet 831; gas-powder mixing outlet 832; powder inlet 833; discharge pipe 84. Implementation Method Example 1

[0043] like Figure 1-13 As shown, the pneumatic conveying type radioactive powder material feeding system includes a factory building, a storage tank 2, an outer cover disassembly and assembly device, a pipeline docking device, an inner cover opening and closing device 5, a transport trolley, a transfer tank 7 and a pneumatic conveying component.

[0044] From bottom to top, the factory building consists of the first, second, and third floors. The first floor houses an overhead slide 11 and a jib crane (not shown). A horizontal track 12 is mounted on the overhead slide 11, which includes a cover assembly and disassembly section and a material discharging docking section. The second floor houses a transfer silo 13, with a feed port A131 at its top.

[0045] The storage tank 2 includes a tank body 21, an operating panel 22, an inner sealing cover, and an outer protective cover. A base plate 211 is welded to each side of the lower end of the tank body 21. The base plate 211 is provided with a guide edge 2111 on the side relatively close to the outside of the tank body 21. The tank body 21 is provided with an inner cavity A. A discharge port A213 is provided at the bottom of the tank body 21. An inner fixing sleeve 215 is fixedly mounted on the outer wall of the lower end of the tank body 21. The outer wall of the inner fixing sleeve 215 is provided with a sealing ring groove and a ball receiving groove in sequence from top to bottom. The operating panel 22 is provided at the upper end of the outer side of the tank body 21. The inner sealing cover is provided inside the discharge port A213 and is associated with the operating panel 22. The inner sealing cover moves vertically up and down as the operating panel 22 rotates. When the inner sealing cover contacts the discharge port A213, the discharge port A213 is closed. When the inner sealing cover is separated from the discharge port A213, the discharge port A213 is opened. The outer protective cover comprises an outer sleeve, a sealing ring 26, and a locking assembly. The outer sleeve comprises an outer vertical ring segment 251, an inner vertical ring segment 252, an upper circular sealing plate 253, a lower outer ring plate 254, and a lower inner ring plate 255. The outer vertical ring segment 251 and the inner vertical ring segment 252 are coaxial and vertically arranged. The inner vertical ring segment 252 is located inside the outer vertical ring segment 251 and is provided with multiple through-holes spaced radially around the outer vertical ring segment 251. The upper circular sealing plate 253 is welded to the upper end of the inner vertical ring segment 252. The lower outer ring plate 254 is welded to the lower ends of the outer and inner vertical ring segments 251 and 252. The lower inner ring plate 255 is fixedly connected to the inner side of the lower outer ring plate 254. The lower inner ring plate 255, the inner vertical ring segment 252, and the upper circular sealing plate 253 together form a finger-receiving groove 256. The sealing ring 26 is installed in the sealing ring groove of the inner fixing sleeve 215. The number of locking assemblies matches the number of through-holes in the outer vertical ring segment 251, and each locking assembly corresponds to each through-hole in the outer vertical ring segment 251. The locking assembly includes a sleeve 271, a ball A272, a spring 273, and a plug 274. One end of the sleeve 271 is welded to the through-hole of the outer vertical ring segment 251 and encloses the through-hole of the outer vertical ring segment 251. The other end of the sleeve 271 extends radially outward from the outer vertical ring segment 251. The ball A272, spring 273, and plug 274 are installed in the inner hole of the sleeve 271 from the inside out. The two ends of the spring 273 respectively abut against the plug 274 and the ball A272. The spring 273 uses its elastic force to force a portion of the ball A272 out of the through-hole of the outer vertical ring segment 251. When the outer protective cover is installed on the outside of the discharge port A213, the outer movable sleeve is sleeved on the lower end of the outer wall of the inner fixed sleeve 215 through the outer vertical ring section 251 and closes the discharge port A213. The outer movable sleeve and the inner fixed sleeve 215 are sealed by the sealing ring 26, and the ball A272 of the locking assembly is embedded in the ball receiving groove of the inner fixed sleeve 215, thereby realizing axial limitation between the inner fixed sleeve 215 and the outer movable sleeve.

[0046] The outer cover disassembly and assembly device is arranged directly below the outer cover disassembly and assembly section of the horizontal track 12, and is used to remove or install the outer protective cover of the storage tank 2. The outer cover disassembly and assembly device includes an electric lifting platform 31, an automatic centering support assembly and a hook action drive assembly. The lower end of the electric lifting platform 31 is directly or indirectly fixed on the ground of a space on one floor, and the upper end of the electric lifting platform 31 is provided with a bearing platform 311. The automatic centering support assembly includes a supporting shell 321, a ball socket A322, a ball B323, a docking shell 324 and a limit rod 325. The lower end of the supporting shell 321 is fixedly mounted on the bearing platform 311, and an inner cavity C is provided inside the supporting shell 321. The top of the supporting shell 321 is provided with a through-rod hole connected to the inner cavity C. A plurality of ball sockets A322 are fixedly mounted on the top of the supporting shell 321. Balls B323 are rotatably mounted within sockets A322, with each ball B323 corresponding to the sockets A322. The upper ends of all balls B323 are aligned horizontally. The docking housing 324 defines an internal cavity D. A movement avoidance groove 3241 is located at the top of the docking housing 324, connecting to the internal cavity D. The lower end of the docking housing 324 is supported by all balls B323. The upper end of the limiting rod 325 is fixedly connected to the lower end of the docking housing 324. The lower end of the limiting rod 325 extends through a rod hole in the support housing 321 and into the internal cavity C of the support housing 321. The limiting rod 325 is suspended in the air. An adjustable gap is provided between the outer surface of the limiting rod 325 and the rod hole in the support housing 321. The hook drive assembly includes a motor A331, a screw 332, a nut A333, a nut B334, and a hook 335. The motor A331 is fixedly mounted within the internal cavity D of the docking housing 324. The screw rod 332 is arranged horizontally and is provided with a first and second threaded segments with opposite rotation directions. One end of the screw rod 332 is directly or indirectly rotatably supported on the docking housing 324, and the other end is connected to the shaft of the motor A331. Nuts A333 and B334 are threadedly connected to the first and second threaded segments of the screw rod 332, respectively. Two hooks 335 are arranged in opposite directions and fixedly connected to the upper ends of nuts A333 and B334, respectively, and each extends from the movement avoidance groove 3241 of the docking housing 324. When the outer cover assembly and disassembly device is docked with the outer protective cover, the two hooks 335 move in opposite directions to their limit positions and respectively abut against the hook finger receiving groove 256. When the outer cover assembly and disassembly device is separated from the outer protective cover, the two hooks 335 move toward each other to their limit positions and both exit the hook finger receiving groove 256.

[0047] The pipe docking device is located directly below the discharge docking section of the horizontal track 12 and is used to connect or disconnect the storage tank 2 from the air conveying assembly. The pipe docking device includes an electric lifting device 41, an automatic centering support assembly, and a docking pipe assembly. The lower end of the electric lifting device 41 is directly or indirectly fixed to the ground of a first-floor space. The upper end of the electric lifting device 41 is provided with a load-bearing platform. The load-bearing platform includes a vertical sleeve 411 and a horizontal ring plate 412 welded to the outer circumference of the vertical sleeve 411. The vertical sleeve 411 is internally provided with a pipe hole A413. The automatic centering support assembly includes a support shell 421, a ball socket B422, and a ball C423. The lower end of the support shell 421 is fixedly mounted on the horizontal ring plate 412 of the load-bearing platform. An inner cavity E is provided within the support shell 421. A through-hole B is provided at the top of the support shell 421, connected to the inner cavity E. The through-hole B of the support shell 421 is arranged opposite the through-hole A413 of the load-bearing platform, and the through-hole B of the support shell 421 encloses the through-hole A413 of the load-bearing platform. Multiple ball sockets B422 are fixedly mounted on the upper end of the horizontal ring plate 412 of the load-bearing platform and are located in the inner cavity E of the support shell 421. Balls C423 are rotatably mounted within the ball sockets B422. The balls C423 correspond one-to-one with the ball sockets B422, and the upper ends of all balls C423 are on the same horizontal plane. The butt-jointed pipe assembly includes an upper rigid tube 431, a bellows 432, and a lower rigid tube 433. A radial ring plate 4311 is welded to the outer circumference of the upper rigid tube 431, and the lower end of the upper rigid tube 431 is fixedly connected to the upper end of the bellows 432. The upper rigid tube 431 passes through the pipe-through hole A413 on the load-bearing platform and the pipe-through hole B at the top of the support shell 421. The upper rigid tube 431 is supported on all the balls C423 via the radial ring plate 4311. A clearance is provided between the outer circumference of the upper rigid tube 431 and the pipe-through hole A413 on the load-bearing platform. The upper end of the bellows 432 is sleeved and fixed to the lower end of the outer circumference of the vertical sleeve 411 of the load-bearing platform, while the lower end of the bellows 432 is sleeved and fixed to the upper end of the outer circumference of the lower rigid tube 433. The pipeline docking device docks or disconnects with the internal fixed sleeve 215 of the storage tank 2 through the upper end of the upper rigid tube 431. The pipeline docking device is fixedly connected to the powder inlet 833 of the conveying pipe 83 of the gas conveying assembly through the lower end of the lower rigid tube 433.

[0048] The inner cover opening and closing device 5 is arranged directly above the outer cover disassembly and assembly section of the horizontal track 12. It is used to drive the operating disk 22 of the storage tank 2 to rotate, drive the inner sealing cover to move up and down, and then separate or fit the inner sealing cover and the discharge port A213 of the storage tank 2 to open or close the discharge port A213 of the storage tank 2.

[0049] The transport trolley is movably mounted on horizontal rails 12 and is used to carry the storage tank 2 between the outer cover assembly and disassembly section and the discharge docking section. The transport trolley comprises a body 61 and a body movement drive assembly. The lower end of the body 61 is equipped with rollers 62, and the upper end of the body 61 is equipped with multiple sets of guide wheels 63. Each set of guide wheels 63 includes at least two guide wheels 63 with horizontally arranged rotating shafts. All guide wheels 63 in a set 63 are arranged in a row, and each set of guide wheels 63 encloses one or more U-shaped areas. Within the U-shaped areas are placement stations for positioning the storage tank 2. A dropout hole 64 is located at the center of each placement station, allowing the upper rigid tube 431 to enter and exit. The body 61 is rotatably mounted on the horizontal rails 12 via rollers 62. The body movement drive assembly comprises a motor B65, a gear (externally enclosed in a dustproof housing, not visible in the figure), and a rack (externally enclosed in a dustproof housing, not visible in the figure). The motor B65 is fixedly mounted to the body 61. The gear is fixedly mounted on the shaft of the motor B65. The rack is directly or indirectly fixedly mounted on the overhead slide 11 and is arranged parallel to the horizontal track 12, with the rack and gear meshing with each other. The vehicle body 61 is provided with a guide plate 66 at each placement station. The height of the guide plate 66 is lower than that of the guide wheel 63. The guide plate 66 encloses the drop-out hole 64 in the placement station. The guide plate 66 is provided with a plurality of sloped surfaces connected in sequence, so that the size of the guide plate 66 gradually decreases from top to bottom. The guide plate 66 contacts the guide edge 2111 of the storage tank 2 via the sloped surface, thereby guiding the storage tank 2. When the storage tank 2 is placed in the guide plate 66, the guide edge 2111 of the storage tank 2 abuts against the lower edge of the sloped surface of the guide plate 66, thereby positioning the storage tank 2.

[0050] The transfer tank 7 is fixedly installed in the third-floor space of the factory building. An inner cavity B is provided inside the transfer tank 7. A dust filtering device is provided in the inner cavity B. The dust filtering device divides the inner cavity B into an upper cavity and a lower cavity from top to bottom. A discharge port B72 connected to the lower cavity is provided at the bottom of the transfer tank 7, and a negative pressure port 73 connected to the upper cavity is provided at the top of the transfer tank 7. A pulse backblowing device 74 connected to the upper cavity and a feed port B75 connected to the lower cavity are provided on the outer wall of the transfer tank 7.

[0051] The pneumatic conveying assembly includes a vacuum pump 81, an exhaust pipe 82, a delivery pipe 83, and a discharge pipe 84. The vacuum pump 81 is provided with an air inlet and an air outlet. The air inlet of the vacuum pump 81 is connected to the atmosphere. One end of the exhaust pipe 82 is connected to the negative pressure port 73 of the transfer tank 7, and the other end is connected to the air outlet of the vacuum pump 81. The delivery pipe 83 is provided with an air inlet 831 and an air-powder mixing outlet 832 at each end. A powder inlet 833 is provided on the pipe body between the air inlet 831 and the air-powder mixing outlet 832. The air inlet 831 of the delivery pipe 83 is connected to the atmosphere. The powder inlet 833 of the delivery pipe 83 is connected to the lower end of the lower rigid pipe 433. The air-powder mixing outlet 832 of the delivery pipe 83 is connected to the feed port B75 of the transfer tank 7. The delivery pipe 83 is provided with a valve A at the air-powder mixing outlet 832, and a valve B at the powder inlet 833. The discharge pipe 84 is connected between the transfer tank 7 and the transfer silo 13 , with its upper end connected to the discharge port B72 of the transfer tank 7 and its lower end connected to the feed port A131 of the transfer silo 13 .

[0052] Preferably, the internal structure of the storage tank 2 is the existing technology, and the specific reference is made to the invention patent with announcement number CN115465685A. The structure and principle of the inner cover opening and closing device 5 are the existing technology, and the specific reference is made to the invention patent with announcement number CN115465685A.

[0053] Preferably, the inner edge of the lower inner ring plate 255 of the outer protective cover is provided with a first tapered surface 2551. Accordingly, the upper end of the docking housing 324 of the outer cover assembly and disassembly device is provided with a second tapered surface 3242 for mating with the first tapered surface 2551. This structure effectively reduces the docking precision requirements between the outer protective cover and the outer cover assembly and disassembly device.

[0054] Preferably, a third tapered surface 2151 is provided at the lower end of the inner fixing sleeve 215 of the tank body 21, and correspondingly, a fourth tapered surface is provided at the upper end of the outer vertical ring section 251 of the outer protective cover for mating with the third tapered surface 2151. This structure effectively reduces the precision requirements for the docking of the tank body 21 and the outer protective cover.

[0055] Preferably, a third tapered surface 2151 is provided at the lower end of the inner fixing sleeve 215 of the tank body 21. Accordingly, a fifth tapered surface 4311 is provided at the upper end of the upper rigid tube 431 for mating with the third tapered surface 2151 at the lower end of the inner fixing sleeve 215. This structure effectively reduces the docking precision requirements between the pipeline docking device and the storage tank 2.

[0056] Preferably, the delivery pipe 83 is equipped with a dust filter (not shown in the figure) for filtering dust at the air inlet 831, which is used to prevent the UO2 powder material remaining in the delivery pipe 83 from escaping from the air inlet 831 when the vacuum pump 81 is not started.

[0057] Briefly describe the working principle of the present invention:

[0058] The present invention is used for automatic feeding of UO2 powder. Before feeding, the components of the present invention are in an initial state. In the initial state:

[0059] ① The electric lifting device 41 of the pipe docking device is at the lowest end of its lifting stroke;

[0060] ② The outer cover disassembly and assembly device includes an electric lifting platform 31 at the lowest end of its lifting stroke;

[0061] ③. Valve B at the powder inlet 833 of the conveying pipe 83 is closed, and valve A at the gas-powder mixing outlet 832 is opened;

[0062] ④. The vacuum pump 81 of the air conveying assembly is started, so that the outside air flows along the path of the air inlet 831, the tube cavity of the conveying pipe 83, the gas-powder mixing outlet 832, the feed port B75, the lower cavity of the transfer tank 7, the dust filter device, the upper cavity of the transfer tank 7, the negative pressure port 73, the exhaust pipe 82, and the air inlet of the vacuum pump 81, and is finally discharged to the outside through the exhaust port of the vacuum pump 81; in this process, negative pressure is formed in the conveying pipe 83.

[0063] S01, remove the outer protective cover:

[0064] a. Hoist the storage tank 2 to be fed with materials to the placement station of the transport trolley by a cantilever crane; during the hoisting process, the guide wheel group first rolls in contact with the guide edge 2111 of the storage tank 2 to correct the deviation, and then the sloped surface inside the guide plate 66 slides in contact with the guide edge 2111 of the storage tank 2 to center the tank; finally, the storage tank 2 is accurately positioned in the placement station of the transport trolley;

[0065] b. The motor B65 of the transport trolley is started, driving the transport trolley and the storage tank 2 to move along the horizontal track 12 to the position directly above the outer cover disassembly device. At this time, the outer protective cover of the storage tank 2 is directly above the hook 335 of the outer cover disassembly device.

[0066] c. The electric lifting platform 31 of the outer cover disassembly and assembly device rises, allowing the hooks 335 to enter the upper end of the inner hole of the lower inner ring plate 255 of the outer protective cover and be flush with the height of the hook finger receiving groove 256. The motor A331 is started, driving the two hooks 335 to move back to the extreme position and respectively abut against the hook finger receiving groove 256 of the outer protective cover.

[0067] d. The electric lifting platform 31 of the outer cover disassembly and assembly device descends, and the outer protective cover is pulled off from the inner fixed sleeve 215 of the storage tank 2 through the two hooks 335. During the separation process of the outer protective cover and the inner fixed sleeve 215, the downward pulling force applied to the outer protective cover by the hooks 335 causes the ball A272 to overcome the elastic force of the spring 273 and temporarily retract into the sleeve 271 of the outer protective cover, thereby releasing the mutually locked state between the outer protective cover and the inner fixed sleeve 215, and allowing the outer protective cover to be smoothly pulled off from the inner fixed sleeve 215.

[0068] In this step, when the storage tank 2 is placed on the placement station of the transport trolley, the outer protective cover faces the blanking hole 64 of the transport trolley, and the columnar space formed by the blanking hole 64 extending to the upper end contains the outer protective cover.

[0069] In this step, during the rising process of the electric lifting platform 31, the first conical surface 2551 at the lower end of the outer protective cover cooperates with the second conical surface 3242 at the upper end of the outer cover disassembly and assembly device, and the adjustment gap provided by the automatic centering support assembly of the outer cover disassembly and assembly device, which together play the role of centering and correcting.

[0070] In this step, the electric lifting platform 31 is lowered to the lowest position, thereby preventing the removed outer protective cover from interfering with the movement of the transport trolley.

[0071] S02, docking delivery pipe:

[0072] a. The motor B65 of the transport trolley is started, driving the transport trolley and the storage tank 2 to move along the horizontal track 12 to the position directly above the pipe docking device. At this time, the inner fixing sleeve 215 of the storage tank 2 is directly above the upper rigid pipe 431 of the pipe docking device.

[0073] b. The electric lifting device 41 of the pipeline docking device rises, driving the load-bearing platform 411, ball socket B422, ball C423, radial ring plate 4311 and upper rigid tube 431 to rise synchronously, so that the upper end of the upper rigid tube 431 is plugged into the lower end of the inner fixed sleeve 215, and a seal is achieved between the two through the sealing ring 26.

[0074] In this step, during the process of plugging the upper rigid tube 431 into the inner fixing sleeve 215, the third conical surface 2151 at the lower end of the inner fixing sleeve 215 cooperates with the fifth conical surface 4311 at the upper end of the upper rigid tube 431, and the movable gap between the upper rigid tube 431 and the load-bearing platform 411, which together play a role in centering and correcting deviation.

[0075] S03, based on pneumatic conveying of powder materials:

[0076] a. Operate the inner cover opening and closing device to turn the operating disk 22 of the storage tank 2 to open the discharge port A213, so that the UO2 powder material is discharged from the discharge port A213 of the storage tank 2; while the discharge port A213 is opened, open the valve B at the powder inlet 833 of the conveying pipe 83;

[0077] b. After the UO2 powder is discharged from the discharge port A213 of the storage tank 2, it enters the lumen of the conveying pipe 83 through the powder inlet 833. Then, the UO2 powder is carried along the lumen of the conveying pipe 83 by the air flow, and enters the lower chamber of the transfer tank 7 through the air-powder mixing outlet 832 and the feed port B75 in sequence.

[0078] c. The UO2 powder is intercepted by the dust filter device and remains in the lower chamber of the transfer tank 7. It then settles downward under the action of its own gravity and passes through the discharge port B72, the discharge pipe 84 and the feed port A131 in sequence to enter the transfer silo 13. The airflow passes through the dust filter device and enters the upper chamber of the transfer tank, and is discharged to the outside through the negative pressure port 73, the exhaust pipe 82 and the vacuum pump 81 in sequence.

[0079] In this step, the pulse back-blowing device 74 is started intermittently to blow the UO2 powder attached to the dust filter device into the lower cavity of the transfer tank 7 to prevent the UO2 powder from clogging the dust filter device and affecting the air flow.

Claims

1. The pneumatic conveying type radioactive powder material feeding system is characterized by: It includes a plant building, storage tanks, outer cover disassembly and assembly device, pipe docking device, inner cover opening and closing device, transport trolley, transfer tank and gas conveying components; The factory building is divided into three layers from bottom to top: the first layer is equipped with an overhead slide, which is equipped with a horizontal track. The horizontal track includes an outer cover disassembly section and a material discharging and docking section. The second layer is equipped with a transfer silo, and the upper end of the transfer silo is equipped with a feed port A. An inner cavity A is provided inside the storage tank, a discharge port A is provided at the bottom of the storage tank, and an inner sealing cover and an outer protective cover are respectively provided on the inner and outer sides of the discharge port A; the storage tank comprises a tank body, an operating panel, an inner sealing cover and an outer protective cover; a bottom plate is welded on both sides of the lower end of the tank body, and the bottom plate is provided with a guide edge on the side relatively close to the outside of the tank body, the inner cavity A is provided inside the tank body, and the discharge port A is provided at the bottom of the tank body, an inner fixing sleeve is fixedly installed on the outer wall of the lower end of the tank body, and a sealing ring groove and a ball receiving groove are provided on the outer wall of the inner fixing sleeve from top to bottom; the operating panel is arranged at the upper end of the outside of the tank body; the inner sealing cover is arranged on the inner side of the discharge port A and is associated with the operating panel, and the inner sealing cover is vertically lifted and lowered as the operating panel rotates, thereby opening or closing the discharge port A; the outer protective cover is movably installed on the outside of the discharge port A, and the outer The protective cover includes an outer movable sleeve, a sealing ring and a locking assembly; the outer movable sleeve includes an outer vertical ring section, an inner vertical ring section, an upper circular sealing plate, a lower outer ring plate and a lower inner ring plate; the outer vertical ring section and the inner vertical ring section are coaxial and arranged vertically, the inner vertical ring section is located on the inner side of the outer vertical ring section, and a plurality of through holes are provided on the outer vertical ring section at intervals along a radial circle; the upper circular sealing plate is welded at the upper end port of the inner vertical ring section; the lower outer ring plate is welded at the lower ends of the outer vertical ring section and the inner vertical ring section; the lower inner ring plate is fixedly connected to the inner side of the lower outer ring plate; the lower inner ring plate, the inner vertical ring section and the upper circular sealing plate together form a hook receiving groove; the sealing ring is installed in the sealing ring groove of the inner fixed sleeve; the number of groups of the locking assembly is consistent with the number of through holes of the outer vertical ring section, and the locking assembly corresponds one to one to the through holes of the outer vertical ring section; the locking assembly includes a sleeve, a ball A, a spring and a plug; One end of the sleeve is welded to the through hole of the outer vertical ring section and contains the through hole of the outer vertical ring section, and the other end of the sleeve extends radially outward of the outer vertical ring section; the ball A, the spring, and the plug are installed in the inner hole of the sleeve from the inside to the outside in sequence, and the two ends of the spring are respectively against the plug and the ball A, and the spring forces a part of the ball A to extend out of the through hole of the outer vertical ring section through elastic force; when the outer protective cover is installed on the outside of the discharge port A, the outer movable sleeve is sleeved on the lower end of the outer wall of the inner fixed sleeve through the outer vertical ring section and closes the discharge port A, and the outer movable sleeve and the inner fixed sleeve are sealed by a sealing ring, and the ball A of the locking assembly is embedded in the ball receiving groove of the inner fixed sleeve, thereby realizing axial limitation between the inner fixed sleeve and the outer movable sleeve; The outer cover disassembly and assembly device is arranged directly below the outer cover disassembly and assembly section, which is used to remove or install the outer protective cover of the storage tank; the outer cover disassembly and assembly device includes an electric lifting platform, an automatic centering support assembly and a hook action drive assembly; the lower end of the electric lifting platform is directly or indirectly fixed on the ground of a space, and the upper end of the electric lifting platform is provided with a bearing platform; the automatic centering support assembly includes a support shell, a ball socket A, a ball B, a docking shell and a limit rod; the lower end of the support shell is fixedly mounted on the bearing platform, an inner cavity C is provided inside the support shell, and a through-rod hole connected to the inner cavity C is provided on the top of the support shell; multiple ball sockets A are fixedly mounted on the top of the support shell; the ball B is rotatably mounted in the ball socket A, and the ball B corresponds to the ball socket A one-to-one, and the upper ends of all balls B are on the same horizontal plane; an inner cavity D is provided inside the docking shell, and an action avoidance groove connected to the inner cavity D is provided on the top of the docking shell, and the lower end of the docking shell is supported by all the balls B; the upper end of the limit rod is fixedly connected to the lower end of the docking shell, The lower end of the positioning rod passes through the rod hole of the supporting shell and extends into the inner cavity C of the supporting shell, and is in a suspended state. An adjustment gap is provided between the outer circular surface of the limiting rod and the rod hole of the supporting shell; the hook action drive assembly includes a motor A, a screw rod, a nut A, a nut B and a hook; the motor A is fixedly installed in the inner cavity D of the docking shell; the screw rod is arranged horizontally, and is provided with a first thread segment and a second thread segment with opposite thread rotation directions, one end of which is directly or indirectly rotatably supported on the docking shell, and the other end is connected to the machine shaft of the motor A; the nut A and the nut B are respectively threadedly connected to the first thread segment and the second thread segment of the screw rod, and the two hooks are arranged back to back and fixedly connected to the upper ends of the nut A and the nut B, and both extend from the action avoidance groove of the docking shell; when the outer cover disassembly and assembly device is docked with the outer protective cover, the two hooks move back to back to the extreme position and respectively abut against the hook finger accommodating groove; when the outer cover disassembly and assembly device is separated from the outer protective cover, the two hooks move toward each other to the extreme position and both withdraw from the hook finger accommodating groove; The pipe docking device is located just below the discharge docking section, and its upper end is docked or separated with the discharge port A of the storage tank; The inner cover opening and closing device is located just above the outer cover disassembly section, and is used to control the movement of the inner sealing cover of the storage tank, thereby opening or closing the discharge port A of the storage tank; The transport trolley can be movably mounted on a horizontal track, on which a placement station for positioning the storage tank is provided; The transfer tank is located on the third floor of the factory building. An inner cavity B is provided inside the transfer tank. A dust filter is installed in the inner cavity B. The dust filter separates the inner cavity B into an upper cavity and a lower cavity from top to bottom. A discharge port B connected to the lower cavity is provided at the bottom of the transfer tank. A negative pressure port connected to the upper cavity is provided at the top of the transfer tank. A pulse backflush device connected to the upper cavity and a feed port B connected to the lower cavity are provided on the outer wall of the transfer tank. The air conveying assembly includes a vacuum pump, an exhaust pipe, a conveying pipe and a discharge pipe; the vacuum pump is provided with an air inlet and an air outlet, and the air outlet of the vacuum pump is connected to the atmosphere; one end of the exhaust pipe is connected to the negative pressure port of the transfer tank, and the other end is connected to the air inlet of the vacuum pump; both ends of the conveying pipe are respectively provided with an air inlet and an air-powder mixing outlet, and the conveying pipe is provided with a powder inlet between the air inlet and the air-powder mixing outlet, the air inlet is connected to the atmosphere, the powder inlet is connected to the lower end of the pipeline docking device, and the air-powder mixing outlet is connected to the feed port B of the transfer tank; a valve A is provided at the air-powder mixing outlet, and a valve B is provided at the powder inlet; the discharge pipe is connected between the discharge port B of the transfer tank and the feed port A of the transfer silo.

2. The pneumatic conveying type radioactive powder material feeding system according to claim 1, characterized in that: The upper end of the outer vertical ring section of the outer protective cover is provided with a fourth conical surface, and correspondingly, the lower end of the inner fixing sleeve of the tank body is provided with a third conical surface for matching with the fourth conical surface.

3. The pneumatic conveying type radioactive powder material feeding system according to claim 2, characterized in that: A first conical surface is provided at the inner edge of the lower inner ring plate of the protective cover. Correspondingly, a second conical surface is provided at the upper end of the docking shell of the outer cover disassembly and assembly device for cooperating with the first conical surface.

4. The pneumatic conveying type radioactive powder material feeding system according to claim 3, characterized in that: The pipeline docking device includes an electric lifting device, an automatic centering support assembly and a docking pipe assembly; the lower end of the electric lifting device is directly or indirectly fixed on the ground of a space of one floor, and the upper end of the electric lifting device is provided with a load-bearing platform, which includes a vertical sleeve and a horizontal ring plate welded on the outer circumference of the vertical sleeve, and a pipe hole A is provided inside the vertical sleeve; the automatic centering support assembly includes a support shell, a ball socket B and a ball C; the lower end of the support shell is fixedly mounted on the horizontal ring plate of the load-bearing platform, an inner cavity E is provided inside the support shell, and a pipe hole B connected to the inner cavity E is provided on the top of the support shell, and the pipe hole B of the support shell is arranged opposite to the pipe hole A of the load-bearing platform and encloses the pipe hole A therein; a plurality of ball sockets B are fixedly mounted on the upper end of the horizontal ring plate of the load-bearing platform and are located in the inner cavity E of the support shell; the ball C can be rotatably mounted in the ball socket B, and the ball C corresponds to the ball socket B one by one, and the upper ends of all the balls C are fixedly mounted on the horizontal ring plate of the load-bearing platform. The ends are on the same horizontal plane; the butt-joining pipe assembly includes an upper rigid tube, a bellows and a lower rigid tube; a radial ring plate is welded on the outer circumferential surface of the upper rigid tube, the upper port of the upper rigid tube is used to dock or separate with the inner fixed sleeve, and the lower port of the upper rigid tube is fixedly connected to the upper port of the bellows; the upper rigid tube passes through the pipe hole A on the load-bearing platform and the pipe hole B on the top of the supporting shell, and is supported on all the balls C through the radial ring plate, and a movable gap is provided between its outer circumferential surface and the pipe hole A on the load-bearing platform; the upper end of the bellows is sleeved and fixed on the lower end of the outer circumferential surface of the vertical sleeve of the load-bearing platform, and the lower end of the bellows is sleeved and fixed on the upper end of the outer circumferential surface of the lower rigid tube; the lower port of the lower rigid tube is fixedly connected to the powder inlet of the conveying pipe; the pipeline docking device is docked or separated with the inner fixed sleeve of the storage tank through the upper port of the upper rigid tube, and the pipeline docking device is fixedly connected to the powder inlet of the conveying pipe of the air conveying assembly through the lower port of the lower rigid tube.

5. The pneumatic conveying type radioactive powder material feeding system according to claim 4, characterized in that: A fifth conical surface is provided at the upper end of the upper rigid pipe of the pipeline docking device, and correspondingly, a third conical surface for matching with the fifth conical surface is provided at the lower end of the inner fixed sleeve of the tank body.

6. The pneumatic conveying type radioactive powder material feeding system according to claim 5, characterized in that: The transport trolley includes a car body and a car body movement drive assembly; rollers are provided at the lower end of the car body, and multiple groups of guide wheels are provided at the upper end of the car body, each group of guide wheels includes at least two guide wheels with horizontally arranged rotating shafts, and all the guide wheels contained in a group of guide wheels are arranged in a row, and each group of guide wheels encloses one or more U-shaped areas, and the U-shaped area is the placement station, and a blanking hole for the upper rigid tube to extend into or exit is provided at the center of the placement station; the car body is installed on the horizontal track through rollers; the car body movement drive assembly includes a motor B, a gear and a rack; the motor B is fixedly installed on the car body; the gear is fixedly installed on the shaft of the motor B; the rack is directly or indirectly fixedly installed on the overhead slide, and is arranged parallel to the horizontal track, and the rack and the gear are engaged with each other.

7. The pneumatic conveying type radioactive powder material feeding system according to claim 6, characterized in that: The vehicle body is provided with a guide plate in each placement station. The height of the guide plate is lower than the height of the guide wheel. The guide plate includes the blanking hole in the placement station. The inside of the guide plate is provided with multiple slope surfaces connected in sequence, so that the size of the inside of the guide plate gradually decreases from top to bottom; the guide plate contacts the guide edge of the storage tank through the slope surface, thereby realizing the guidance of the storage tank.

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