Uranium dioxide powder storage tank and method of dismounting its cover

Abstract

The application relates to a uranium dioxide powder storage tank and a method for disassembling and assembling the cover of the tank, and relates to the technical field of uranium conversion related equipment. The uranium dioxide powder storage tank comprises a tank body, an operation disc, an inner sealing cover and an outer protective cover. The outer protective cover comprises an outer movable sleeve, a sealing ring and a locking assembly. When the outer protective cover is installed on the outer side of the discharge port of the tank body, the outer movable sleeve is sleeved on the outer wall surface of the inner fixed sleeve at the lower end and seals the discharge port of the tank body, and the ball A of the locking assembly is embedded in the ball accommodating groove of the inner fixed sleeve, so that the axial position of the inner fixed sleeve and the outer movable sleeve is limited. The outer protective cover structure of the storage tank mainly plays the roles of meeting the automatic feeding requirement and ensuring the transportation safety. The structure of the outer protective cover is adapted to the structure of the outer cover disassembling and assembling device. The outer protective cover can be disassembled or assembled from the discharge port of the storage tank through the outer cover disassembling and assembling device, manual disassembling and assembling is not needed, and the cover disassembling and assembling process is simple, fast and controllable.

Description

Technical Field

[0001] This invention relates to the field of uranium conversion-related equipment technology, and in particular to a uranium dioxide powder storage tank and its disassembly and assembly method. Background Technology

[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 process from uranium ore concentrate to refined UO2. Uranium conversion refers to the production process from refined UO2 to UF6. The UO2 powder produced in the uranium purification step is stored in specially designed sealed containers for later use. When it comes to the uranium conversion step, the UO2 powder from multiple sealed containers needs to be discharged into a transfer silo; this operation is called the UO2 feeding operation.

[0003] The invention patent CN113443329A, entitled "Automatic Feeding System for Uranium Conversion Materials," discloses a "sealed container" structure (see [link]). Figure 5 As stated in paragraph 0037 of the instruction manual, the "sealed container" mentioned in the above-described UO2 feeding operation is the same as the "sealed container" mentioned earlier. The sealed container has an inner sealing cap and an outer protective cap on both the inner and outer sides of its discharge port at the lower end. During the UO2 feeding operation, the outer protective cap must first be removed. Then, the discharge port of the sealed container is connected to the container or pipe used for receiving the material. Finally, the inner sealing cap is opened to allow the powder to be discharged from the inner cavity of the sealed container. After completing the UO2 feeding operation, the inner sealing cap is first closed to seal the inner cavity of the sealed container. Then, the connection between the discharge port of the sealed container and the container or pipe used for receiving the material is disconnected. Finally, the outer protective cap is installed on the outside of the discharge port of the sealed container.

[0004] As shown in Figure 10-14, the outer cover of the sealed container includes a cover body 81, lower ear seats 82, upper ear seats 83, hinge shafts 84, bolts 85, and wing nuts 86. The cover body is adapted to the size of the aforementioned discharge port, and it can encompass the aforementioned discharge port. Multiple lower ear seats are annularly and evenly welded to the outer wall of the cover body, and a hinge shaft is movably mounted on each lower ear seat. Multiple upper ear seats are annularly and evenly welded to the sides of the aforementioned annular step, and are arranged vertically opposite to the lower ear seats. The upper ear seats have U-shaped gaps for bolt movement. The number of bolts is the same as the number of hinge shafts. The lower end of the bolt is fixedly connected to the hinge shaft, and the bolt can rotate in a vertical plane around the hinge shaft, so that the upper end of the bolt passes through the U-shaped gap and protrudes from the upper ear seat, or exits the U-shaped gap and is located at the lower end of the upper ear seat. The number of wing nuts is the same as the number of bolts, and they are threadedly connected to the bolts. Rotate the upper end of the bolt to the upper ear seat, then tighten the wing nut so that it presses against the upper surface of the annular step, thus installing the outer cover onto the sealed container. Loosen the wing nut to disengage it from the upper surface of the annular step, then rotate the lower end of the bolt to the lower end of the upper ear seat, thus unlocking the outer cover from the sealed container.

[0005] The above-mentioned process of disassembling and installing the outer cover of the sealed container is carried out at the bottom of the sealed container. The operating space is cramped and narrow. Loosening or tightening the wing nut requires the operator to squat or lie down at multiple points. In addition, to remove the outer cover from the bottom of the sealed container or to put the outer cover into the bottom of the sealed container, the sealed container needs to be temporarily raised to a certain height first.

[0006] In summary, based on the existing structure of the sealed container lid, the disassembly and installation process is time-consuming, labor-intensive, and cumbersome, making it difficult to automate the lid disassembly and installation operation (this is partly due to the cramped and narrow operating space for lid disassembly and installation, making it difficult for the robotic arm to reach in, and partly due to the large number of operating points for lid disassembly and installation, requiring the tightening / loosening of multiple wing nuts and the rotation of multiple bolts, which further increases the difficulty of setting up the robotic arm). Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a uranium dioxide powder storage tank and a method for disassembling and assembling the cover thereon. This invention solves the problem that the existing sealed tanks used for UO2 feeding operations are time-consuming and laborious to disassemble / install the outer cover, with complicated steps, making it difficult to automate the disassembly and assembly of the cover.

[0008] The technical solution of the present invention is: a uranium dioxide powder storage tank, comprising a tank body, an operating panel, an inner sealing cover, and an outer protective cover; A bottom plate is welded to each of the two sides at the lower end of the tank. The bottom plate has a guide edge on the side that is relatively close to the outside of the tank. The tank has an inner cavity inside and a discharge port at the bottom. An inner fixing sleeve is fixedly connected to the outer wall at the lower end of the tank. A sealing ring groove and a ball receiving groove are arranged from top to bottom on the outer wall of the inner fixing sleeve. The control panel is located on the upper part of the tank exterior; The inner sealing cover is located inside the discharge port of the tank and is associated with the control panel. The inner sealing cover moves vertically up and down as the control panel rotates, thereby closing or opening the discharge port of the tank. The outer protective cover is located outside the discharge port of the tank. 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 and inner vertical ring sections are coaxial and vertically arranged. The inner vertical ring section is located inside the outer vertical ring section. Multiple through holes are spaced radially around the outer vertical ring section. The upper circular sealing plate is welded to the upper end of the inner vertical ring section. The lower outer ring plate is welded to the lower ends of the outer and inner vertical ring sections. The lower inner ring plate is fixedly connected to the inner side of the lower outer ring plate. The lower inner ring plate, inner vertical ring section, and upper circular sealing plate together form a hook-shaped enclosure. The 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 in the outer vertical ring section, and the locking components correspond one-to-one with the through holes in the outer vertical ring section; the locking components include a sleeve, ball A, spring and plug; one end of the sleeve is welded to the through hole of the outer vertical ring section and encloses 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; ball A, spring and plug are installed in the inner hole of the sleeve from the inside to the outside, and the two ends of the spring abut against the plug and ball A respectively. The spring forces a part of ball A to protrude from the through hole of the outer vertical ring section through its elastic force; When the outer protective cover is installed on the outside of the discharge port of the tank, the outer movable sleeve is fitted onto the lower end of the outer wall of the inner fixed sleeve through the outer vertical ring section and closes the discharge port of the tank. The outer movable sleeve and the inner fixed sleeve are sealed by a sealing ring. The ball A of the locking component is embedded in the ball receiving groove of the inner fixed sleeve, thereby achieving axial positioning between the inner fixed sleeve and the outer movable sleeve.

[0009] A further technical solution of the present invention is: the upper end of the inner fixing sleeve is provided with a mounting plate B extending radially, and an annular plate extending radially is welded on the outer wall of the lower end of the tank body. The inner fixing sleeve is fixedly installed on the lower end of the annular plate of the tank body through the mounting plate B.

[0010] A further technical solution of the present invention is: the lower end of the inner fixing sleeve of the tank body is provided with a third conical surface, and correspondingly, the upper end of the outer vertical ring section of the outer protective cover is provided with a fourth conical surface for cooperating with the third conical surface.

[0011] A further technical solution of the present invention is: 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 housing of the outer cover disassembly and assembly device for cooperating with the first conical surface.

[0012] The technical solution of the present invention is: an automatic cap removal and cap installation method for a uranium dioxide powder storage tank, wherein the cap removal method is used to remove the outer protective cap of the uranium dioxide powder storage tank, and the cap installation method is used to install the outer protective cap of the uranium dioxide powder storage tank; both the automatic cap removal method and the automatic cap installation method require the use of an overhead slide, a transport trolley, and an outer cap removal and installation device to be implemented; The overhead sliding table is fixedly installed on the ground and has a horizontal track on it. The horizontal track includes an outer cover disassembly section and a material discharge docking section. The outer cover disassembly and assembly device is fixedly installed directly below the overhead sliding platform; the outer cover disassembly and assembly device includes an electric lifting platform, an automatic self-aligning 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, and the upper end of the electric lifting platform is provided with a bearing platform; the automatic self-aligning support assembly includes a support housing, ball sockets A, balls B, a docking housing, and a limiting rod; the lower end of the support housing is fixedly installed on the bearing platform, the support housing has an inner cavity C inside, and the top of the support housing has a through hole communicating with the inner cavity C; multiple ball sockets A are fixedly installed on the top of the support housing; the balls B are rotatably installed in the ball sockets A, and the balls B correspond one-to-one with the ball sockets A, and the upper ends of all balls B are on the same horizontal plane; the docking housing has an inner cavity D inside, and the top of the docking housing has an action clearance groove communicating with the inner cavity D, and the lower end of the docking housing is supported by all the balls B; the upper end of the limiting rod is fixedly connected to the lower end of the docking housing, and the lower end of the limiting rod passes through the support. The rod extends into the inner cavity C of the supporting housing through the rod hole and is suspended in the air. An adjustment gap is provided between the outer circular surface of the limiting rod and the rod hole of the supporting housing. The hook action drive assembly includes a motor A, a lead screw, a nut A, and hooks. The motor A is fixedly installed in the inner cavity D of the docking housing. The lead screw is arranged horizontally and has a first thread section and a second thread section with opposite thread directions. One end of the lead screw is directly or indirectly rotatably supported on the docking housing, and the other end is connected to the shaft of the motor A. The lead screw and the nut A are respectively threaded to the first thread section and the second thread section of the lead screw. The two hooks are arranged in opposite directions and fixedly connected to the upper ends of the lead screw and the nut A, and both extend out of the action clearance groove of the docking housing. When the outer cover removal and assembly device docks with the outer protective cover, the two hooks move to their extreme positions in opposite directions and abut against the hook receiving grooves respectively. When the outer cover removal and assembly device separates from the outer protective cover, the two hooks move to their extreme positions in opposite directions and both exit the hook receiving grooves. The transport trolley includes a body and a body movement drive assembly. The lower end of the body is equipped with rollers, and the upper end has multiple sets of guide wheels. Each set of guide wheels includes at least two horizontally arranged guide wheels with rotating shafts. All guide wheels in a set are arranged in a row, and the sets of guide wheels together form one or more U-shaped areas. These U-shaped areas are the placement stations, and the center of each placement station has a discharge hole for the upper rigid tube to enter or exit. The body is mounted on a horizontal track by rolling on the rollers. The body movement drive assembly includes a motor B, gears, and a rack. Motor B is fixedly mounted... Mounted on the vehicle body; the gear is fixedly mounted on the shaft of motor B; the rack is directly or indirectly fixedly mounted on the overhead slide and arranged parallel to the horizontal track, with the rack and gear meshing with each other; the vehicle body has 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 encloses the material drop hole in the placement station, and the guide plate has multiple sequentially connected ramps inside, so that the internal dimensions of the guide plate gradually decrease from top to bottom; the guide plate contacts the guide edge of the tank through the ramps, thereby guiding the storage tank; Before the automatic cap removal method is implemented: the electric lifting platform in the outer cap removal device is at the lowest point of its lifting stroke, the two hooks in the outer cap removal device are at the closest position to each other, the outer protective cap is installed on the outside of the discharge port of the tank, at this time, the outer movable sleeve is fitted onto the lower end of the outer wall of the inner fixed sleeve through the outer vertical ring section and closes the discharge port of the tank, the outer movable sleeve and the inner fixed sleeve are sealed by the sealing ring, and the ball A of the locking component is embedded in the ball receiving groove of the inner fixed sleeve, thereby realizing the axial limit between the inner fixed sleeve and the outer movable sleeve; The automatic cap removal method is as follows: S01, Alignment: The uranium dioxide powder storage tank with the outer protective cover is hoisted into the placement position of the transport trolley. During the hoisting process, the guide wheel assembly first rolls into contact with the guide edge of the tank to correct deviation. Then, the inclined surface inside the guide plate slides into contact with the guide edge of the tank to center it. Finally, the uranium dioxide powder storage tank is accurately positioned in the placement position of the transport trolley. The motor B of the transport trolley is started, driving the transport trolley and the uranium dioxide powder storage tank to move along the horizontal track to directly above the outer cover removal and installation device. At this time, the outer protective cover of the uranium dioxide powder storage tank is directly above the hook of the outer cover removal and installation device. S02, Connecting the outer protective cover: The electric lifting platform of the outer cover removal and installation device rises, so that the hooks enter the upper end of the inner hole of the lower inner ring plate of the outer protective cover and are level with the height of the hook receiving groove; Motor A starts, driving the two hooks to move back to back to the limit position and respectively abut against the hook receiving groove of the outer protective cover. S03, Remove the outer protective cover: The electric lifting platform of the outer cover removal device descends and uses two hooks to pull the outer protective cover off the inner fixed sleeve of the tank. During the separation of the outer protective cover from the inner fixed sleeve, the downward pulling force applied to the outer protective cover by the hooks causes the ball A to overcome the spring force and temporarily retract into the sleeve of the outer protective cover, thereby releasing the mutual locking state between the outer protective cover and the inner fixed sleeve, so that the outer protective cover can be smoothly pulled off the inner fixed sleeve. Before the automatic capping method is executed: the outer protective cap is connected to the upper end of the outer cap removal and installation device. At this time, the two hooks of the outer cap removal and installation device are at the farthest position from each other, and the two hooks respectively abut against the hook receiving groove of the outer protective cap; the electric lifting platform in the outer cap removal and installation device is at the lowest point of its lifting stroke. The automatic capping method is as follows: S01, Alignment: The uranium dioxide powder storage tank with the outer protective cover is hoisted into the placement position of the transport trolley. During the hoisting process, the guide wheel assembly first rolls into contact with the guide edge of the tank to correct deviation. Then, the inclined surface inside the guide plate slides into contact with the guide edge of the tank to center it. Finally, the uranium dioxide powder storage tank is accurately positioned in the placement position of the transport trolley. The motor B of the transport trolley is started, driving the transport trolley and the uranium dioxide powder storage tank to move along the horizontal track to directly above the outer cover removal and installation device. At this time, the outer protective cover is directly below the discharge port of the tank. S02, Install the outer protective cover: The electric lifting platform of the outer cover removal and installation device rises, driving the outer protective cover to move upward, so that the outer movable sleeve is inserted into the lower end of the outer wall of the inner fixed sleeve through the outer vertical ring section and closes the discharge port of the tank; when the outer protective cover moves upward until the ball A of the locking component is aligned with the ball receiving groove of the inner fixed sleeve, the ball A of the locking component is then embedded in the ball receiving groove of the inner fixed sleeve under the elastic force of the spring, thereby realizing the axial limit between the inner fixed sleeve and the outer movable sleeve.

[0013] A further technical solution of the present invention is: in step S02 of the cover removal method, during the upward movement of the electric lifting platform, the first conical surface at the lower end of the outer protective cover cooperates with the second conical surface at the upper end of the outer cover removal and assembly device, and the adjustment gap provided by the automatic self-aligning support component of the outer cover removal and assembly device together play the role of centering and correction.

[0014] A further technical solution of the present invention is: in step S02 of the capping method, the outer movable sleeve and the inner fixed sleeve are sealed by a sealing ring, the structure in which the third conical surface at the lower end of the inner fixed sleeve of the tank body matches 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 self-aligning support assembly of the outer cover disassembly and assembly device, together play the role of centering and correction.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The outer protective cover structure on the storage tank mainly serves to meet the needs of automated feeding and ensure transportation safety. The structure of the outer protective cover is adapted to the structure of the outer cover removal and installation device. The outer protective cover can be removed or installed from the discharge port of the storage tank through the outer cover removal and installation device without manual disassembly and assembly. The disassembly and assembly process is simple, quick and controllable.

[0016] 2. Multiple structures were designed on the storage tank and the outer cover removal / installation device to reduce the accuracy requirements of the docking. 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 mates with the second conical surface at the upper end of the docking housing of the outer cover removal / installation device, along with the adjustment gap provided by the automatic self-aligning support assembly of the outer cover removal / installation device, together serve to center and correct deviation. When installing the outer protective cover: the structure in which the third conical surface at the lower end of the inner fixing sleeve of the tank mates with the fourth conical surface at the upper end of the outer vertical ring section of the outer protective cover, along with the adjustment gap provided by the automatic self-aligning support assembly of the outer cover removal / installation device, together serve to center and correct deviation.

[0017] The present invention will be further described below with reference to the figures and embodiments. Attached Figure Description

[0018] Figure 1 This is an external view of the present invention; Figure 2 This is a diagram showing the working state of the outer cover disassembly and assembly device from one perspective. Figure 3 This is a diagram showing the working state of the outer cover removal and assembly device from another perspective. Figure 4 for Figure 2 Enlarged view of part A; Figure 5 for Figure 3 Enlarged view of part B; Figure 6 A diagram showing the positional relationship between the overhead slide, the transport trolley, and the outer cover assembly / disassembly device; Figure 7 This is an external view of the outer cover removal and assembly device.

[0019] Legend: 11. Overhead slide; 12. Horizontal track; 21. Tank body; 211. Bottom plate; 2111. Guide edge; 2111. Discharge port; 213. Annular plate; 214. Inner fixing sleeve; 215. Mounting plate; 2151. Third conical surface; 2152. Operating plate; 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 bearing A 272; Spring 273; Plug 274; Electric lifting platform 31; Bearing platform 311; Support housing 321; Ball socket seat A322; Ball bearing B323; Connecting housing 324; Action clearance groove 3241; Second cone surface 3242; Limiting rod 325; Motor A331; Lead screw 332; Nut A333; Nut B334; Hook 335; Car body 61; Roller 62; Guide wheel 63; Drop hole 64; Motor B65; Guide plate 66. Implementation Example 1

[0020] like Figure 1-5 As shown, the uranium dioxide powder storage tank includes a tank body 21, an operating panel 22, an inner sealing cover, and an outer protective cover.

[0021] A bottom plate 211 is welded to each of the two sides of the lower end of the tank body 21. The bottom plate 211 has a guide edge 2111 on the side relatively close to the outside of the tank body 21. The tank body 21 has an inner cavity inside. The bottom of the tank body 21 has a discharge port 213. An annular plate 214 extending radially is welded to the lower outer wall of the tank body 21. An inner fixing sleeve 215 is fixedly connected to the lower end of the annular plate 214. An installation plate 2151 extending radially is provided at the upper end of the inner fixing sleeve 215. A sealing ring groove and a ball receiving groove are provided sequentially from top to bottom on the outer wall of the inner fixing sleeve 215. A third conical surface 2152 is provided at the lower end of the inner fixing sleeve 215. The inner fixing sleeve 215 is fixedly installed at the lower end of the annular plate 214 of the tank body 21 through the installation plate 2151.

[0022] The control panel 22 is located on the upper part of the outside of the tank body 21.

[0023] The inner sealing cover is located inside the discharge port 213 of the tank body 21. The inner sealing cover is associated with the operating plate 22 and moves vertically up and down as the operating plate 22 rotates. When the inner sealing cover abuts against the discharge port 213, the discharge port 213 is closed. When the inner sealing cover is separated from the discharge port 213, the discharge port 213 is opened.

[0024] An outer protective cover is located outside the discharge port 213 of the tank body 21. The outer protective cover includes an outer movable sleeve, a sealing ring 26, and a locking assembly. The outer movable sleeve includes an outer vertical ring section 251, an inner vertical ring section 252, an upper circular sealing plate 253, a lower outer ring plate 254, and a lower inner ring plate 255. The outer vertical ring section 251 and the inner vertical ring section 252 are coaxial and vertically arranged. The inner vertical ring section 252 is located inside the outer vertical ring section 251. The outer vertical ring section 251 has multiple through holes spaced radially around it. The upper end of the outer vertical ring section 251 has a fourth conical surface for engaging with the third conical surface 2152. The upper circular sealing plate 253 is welded to the upper end of the inner vertical ring section 252. The lower outer ring plate 254 is welded to the lower ends of the outer vertical ring section 251 and the inner vertical ring section 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 section 252, and the upper circular sealing plate 253 together form a hook-shaped receiving groove 256. A sealing ring 26 is installed in the sealing ring groove of the inner fixing sleeve 215. The number of locking components matches the number of through holes in the outer vertical ring section 251, and each locking component corresponds one-to-one with a through hole in the outer vertical ring section 251. The locking components include a sleeve 271, a ball bearing 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 section 251 and encloses the through hole; the other end of the sleeve 271 extends radially outward from the outer vertical ring section 251. The ball bearing A272, spring 273, and plug 274 are installed sequentially from the inside to the outside in the inner hole of the sleeve 271. The two ends of the spring 273 abut against the plug 274 and the ball bearing A272, respectively. The spring 273 forces a portion of the ball bearing A272 to protrude from the through hole of the outer vertical ring section 251 through its elastic force. When the outer protective cover is installed outside the discharge port 213 of the tank body 21, the outer movable sleeve is fitted onto 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 213 of the tank body 21. The outer movable sleeve and the inner fixed sleeve 215 are sealed by the sealing ring 26. The ball bearing A272 of the locking component is embedded in the ball bearing receiving groove of the inner fixed sleeve 215, thereby achieving axial positioning between the inner fixed sleeve 215 and the outer movable sleeve.

[0025] Preferably, a first conical surface 2551 is provided at the inner edge of the lower inner ring plate 255 of the outer protective cover, and correspondingly, a second conical surface 3242 for engaging with the first conical surface 2551 is provided at the upper end of the docking housing 324 of the outer cover disassembly and assembly device. Based on this structure, the docking accuracy requirements between the outer protective cover and the outer cover disassembly and assembly device can be effectively reduced.

[0026] Preferably, the lower end of the inner fixing sleeve 215 of the tank body 21 is provided with a third conical surface 2152, and correspondingly, the upper end of the outer vertical ring section 251 of the outer protective cover is provided with a fourth conical surface for engaging with the third conical surface 2152. Based on this structure, the required docking accuracy between the outer protective cover and the tank body 21 can be effectively reduced.

[0027] Preferably, the internal structure of the tank 21 is the prior art (including the inner sealing cover, the operating panel, and the transmission components between the inner sealing cover and the operating panel), and for details, please refer to the invention patent with announcement number CN115465685A.

[0028] Brief description of the use of this invention: An automatic cap removal and cap installation method for a uranium dioxide powder storage tank is provided. The cap removal method is used to remove the outer protective cap of the uranium dioxide powder storage tank, and the cap installation method is used to install the outer protective cap of the uranium dioxide powder storage tank. Both the automatic cap removal method and the automatic cap installation method require the use of an overhead slide table 11, a transport trolley, and an outer cap removal and installation device to be implemented.

[0029] like Figure 2-7 As shown, the overhead sliding table 11 is fixedly installed on the ground, and a horizontal track 12 is provided on it. The horizontal track 12 includes an outer cover disassembly section and a material discharge docking section.

[0030] A transport trolley is movably mounted on a horizontal track 12, used to move the storage tank 2 between the outer cover disassembly section and the discharge docking section. The transport trolley includes 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 axles. All guide wheels 63 in a set are arranged in a row, and the sets of guide wheels 63 together form one or more U-shaped areas. The U-shaped areas are placement stations for positioning the storage tank 2, and the center of the placement station has a discharge hole 64 for the upper rigid tube 431 to extend into or retract. The body 61 is rolled on the horizontal track 12 by the rollers 62. The body movement drive assembly includes a motor B65, a gear (externally covered with a dustproof housing, therefore not visible in the figure), and a rack (externally covered with a dustproof housing, therefore not visible in the figure). The motor B65 is fixedly mounted on the body 61. The gear is fixedly mounted on the shaft of motor B65. The rack is directly or indirectly fixedly mounted on the overhead slide table 11 and arranged parallel to the horizontal track 12, with the rack and gear meshing with each other. The car body 61 has a guide plate 66 in each placement station. The height of the guide plate 66 is lower than the height of the guide wheel 63. The guide plate 66 encloses the material drop hole 64 in the placement station. The guide plate 66 has multiple sequentially connected ramps inside, causing the internal dimensions of the guide plate 66 to gradually decrease from top to bottom. The guide plate 66 contacts the guide edge 2111 of the storage tank 2 through the ramps, 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 ramp of the guide plate 66, thereby positioning the storage tank 2.

[0031] The outer cover removal and installation device is located directly below the outer cover removal and installation section of the horizontal track 12, and is used to remove or install the outer protective cover of the storage tank. The outer cover removal and installation device includes an electric lifting platform 31, an automatic self-aligning support assembly, and a hook action drive assembly. The lower end of the electric lifting platform 31 is directly or indirectly fixed to the ground, and the upper end of the electric lifting platform 31 is provided with a bearing platform 311. The automatic self-aligning support assembly includes a support housing 321, ball sockets A322, balls B323, a docking housing 324, and a limiting rod 325. The lower end of the support housing 321 is fixedly installed on the bearing platform 311, and the support housing 321 has an inner cavity C. The top of the support housing 321 has a through hole communicating with the inner cavity C. Multiple ball sockets A322 are fixedly installed on the top of the support housing 321. Balls B323 are rotatably installed in the ball sockets A322, and each ball B323 corresponds one-to-one with a ball socket A322, with the upper ends of all balls B323 on the same horizontal plane. The docking housing 324 has an inner cavity D. The top of the docking housing 324 has an action clearance groove 3241 that connects to the inner cavity D. The lower end of the docking housing 324 is supported by all the 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 passes through the rod hole of the supporting housing 321 and extends into the inner cavity C of the supporting housing 321, where it is suspended. An adjustment gap is provided between the outer surface of the limiting rod 325 and the rod hole of the supporting housing 321. The grappling hook drive assembly includes a motor A331, a lead screw 332, a lead screw 333, a nut A334, and a grappling hook 335. The motor A331 is fixedly installed in the inner cavity D of the docking housing 324. The lead screw 332 is horizontally arranged and has a first thread section and a second thread section with opposite thread directions. One end of the lead screw 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. Lead screw 333 and nut A334 are threadedly connected to the first and second threaded sections of lead screw 332, respectively. Two claws 335 are arranged back-to-back and fixedly connected to the upper ends of lead screw 333 and nut A334, respectively, and both extend from the action clearance groove 3241 of the mating housing 324. When the outer cover removal device mates with the outer protective cover, the two claws 335 move back-to-back to their limit positions and abut against the hook receiving groove 256. When the outer cover removal device separates from the outer protective cover, the two claws 335 move towards each other to their limit positions and both retract from the hook receiving groove 256.

[0032] Before executing the automatic cap removal method: The electric lifting platform 31 in the outer cover removal and installation device is at the lowest point of its lifting stroke. The two hooks 335 in the outer cover removal and installation device are at the closest position to each other. The outer protective cover is installed on the outside of the discharge port 213 of the tank body 21. At this time, the outer movable sleeve is fitted onto the lower end of the outer wall surface of the inner fixed sleeve 215 through the outer vertical ring section 251 and closes the discharge port 213 of the tank body 21. The outer movable sleeve and the inner fixed sleeve 215 are sealed by the sealing ring 26. The ball A272 of the locking component is embedded in the ball receiving groove of the inner fixed sleeve 215, thereby realizing the axial limit between the inner fixed sleeve 215 and the outer movable sleeve.

[0033] The automatic cap removal method is as follows: S01, Alignment: The uranium dioxide powder storage tank with the outer protective cover is hoisted into the placement position of the transport trolley. During the hoisting process, the guide wheel assembly first rolls into contact with the guide edge 2111 of the tank body to correct deviation. Then, the inclined surface inside the guide plate 66 slides into contact with the guide edge 2111 of the tank body to center it. Finally, the uranium dioxide powder storage tank is accurately positioned in the placement position of the transport trolley. The motor B65 of the transport trolley is started, driving the transport trolley and the uranium dioxide powder storage tank to move along the horizontal track 12 to directly above the outer cover removal and installation device. At this time, the outer protective cover of the uranium dioxide powder storage tank is directly above the hook 335 of the outer cover removal and installation device.

[0034] S02, Connecting the outer protective cover: The electric lifting platform 31 of the outer cover removal and installation device rises, causing the hook 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 receiving groove 256; the motor A331 starts, driving the two hooks 335 to move back to their extreme positions and respectively abut against the hook receiving groove 256 of the outer protective cover.

[0035] S03, Remove the outer protective cover: The electric lifting platform 31 of the outer cover removal device descends and pulls the outer protective cover off the inner fixing sleeve 215 of the tank body 21 through two hooks 335. During the separation of the outer protective cover from the inner fixing 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 mutual locking state between the outer protective cover and the inner fixing sleeve 215, so that the outer protective cover can be smoothly pulled off the inner fixing sleeve 215.

[0036] In step S02 of the cover removal method, during the ascent of the electric lifting platform 31, the first conical surface 2551 at the lower end of the outer protective cover and the second conical surface 3242 at the upper end of the outer cover removal device cooperate, and the adjustment gap provided by the automatic self-aligning support component of the outer cover removal device together play a role in centering and correcting deviation.

[0037] Before the automatic capping method is executed: the outer protective cap is connected to the upper end of the outer cap removal and installation device. At this time, the two hooks 335 of the outer cap removal and installation device are at the farthest position from each other, and the two hooks 335 respectively abut against the hook receiving groove 256 of the outer protective cap; the electric lifting platform 31 in the outer cap removal and installation device is at the lowest end of its lifting stroke.

[0038] The automatic capping method is as follows: S01, Alignment: The uranium dioxide powder storage tank with the outer protective cover is hoisted into the placement position of the transport trolley. During the hoisting process, the guide wheel assembly first rolls into contact with the guide edge 2111 of the tank body 21 to correct deviation. Then, the inclined surface inside the guide plate 66 slides into contact with the guide edge 2111 of the tank body 21 to center it. Finally, the uranium dioxide powder storage tank is accurately positioned in the placement position of the transport trolley. The motor B65 of the transport trolley is started, driving the transport trolley and the uranium dioxide powder storage tank to move along the horizontal track 12 to directly above the outer cover removal and installation device. At this time, the outer protective cover is directly below the discharge port 213 of the tank body.

[0039] S02, Install the outer protective cover: The electric lifting platform 31 of the outer cover removal and installation device rises, driving the outer protective cover to move upward, so that the outer movable sleeve is inserted into 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 213 of the tank body 21; when the outer protective cover moves upward until the ball A272 of the locking component is aligned with the ball receiving groove of the inner fixed sleeve 215, the ball A272 of the locking component is then embedded in the ball receiving groove of the inner fixed sleeve 215 under the elastic force of the spring 273, thereby realizing the axial limit between the inner fixed sleeve 215 and the outer movable sleeve.

[0040] In step S02 of the capping method, the outer movable sleeve and the inner fixed sleeve 215 are sealed by the sealing ring 26. The structure in which the third conical surface 2152 at the lower end of the inner fixed sleeve 215 of the tank body 21 matches the fourth conical surface at the upper end of the outer vertical ring section 251 of the outer protective cover, and the adjustment gap provided by the automatic self-aligning support assembly of the outer cover disassembly and assembly device, together play the role of centering and correction.

Claims

1. A storage container for uranium dioxide powder, characterized in that: Includes the tank body, control panel, inner sealing cover, and outer protective cover; A bottom plate is welded to each of the two sides at the lower end of the tank. The bottom plate has a guide edge on the side that is relatively close to the outside of the tank. The tank has an inner cavity inside and a discharge port at the bottom. An inner fixing sleeve is fixedly connected to the outer wall at the lower end of the tank. A sealing ring groove and a ball receiving groove are arranged from top to bottom on the outer wall of the inner fixing sleeve. The control panel is located on the upper part of the tank exterior; The inner sealing cover is located inside the discharge port of the tank and is associated with the control panel. The inner sealing cover moves vertically up and down as the control panel rotates, thereby closing or opening the discharge port of the tank. The outer protective cover is located outside the discharge port of the tank. 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 and inner vertical ring sections are coaxial and vertically arranged. The inner vertical ring section is located inside the outer vertical ring section. Multiple through holes are spaced radially around the outer vertical ring section. The upper circular sealing plate is welded to the upper end of the inner vertical ring section. The lower outer ring plate is welded to the lower ends of the outer and inner vertical ring sections. The lower inner ring plate is fixedly connected to the inner side of the lower outer ring plate. The lower inner ring plate, inner vertical ring section, and upper circular sealing plate together form a hook-shaped receiving groove. The sealing ring is installed in the sealing ring groove of the inner fixed sleeve. The number of locking assemblies matches the number of through holes in the outer vertical ring section, and each locking assembly corresponds one-to-one with a through hole in the outer vertical ring section. The locking assembly 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 section and encloses the through hole of the outer vertical ring section. The other end of the sleeve extends radially outward from the outer vertical ring section. The ball A, spring, and plug are installed in the inner hole of the sleeve from the inside to the outside. The two ends of the spring abut against the plug and ball A respectively. The spring forces a part of ball A to extend out of the through hole of the outer vertical ring section through its elastic force. When the outer protective cover is installed on the outside of the discharge port of the tank, the outer movable sleeve is fitted onto the lower end of the outer wall of the inner fixed sleeve through the outer vertical ring section and closes the discharge port of the tank. The outer movable sleeve and the inner fixed sleeve are sealed by a sealing ring. The ball A of the locking component is embedded in the ball receiving groove of the inner fixed sleeve, thereby achieving axial positioning between the inner fixed sleeve and the outer movable sleeve.

2. The uranium dioxide powder storage container as described in claim 1, characterized in that: The inner fixing sleeve is provided with a radially extending mounting plate B at its upper end, and a radially extending annular plate is welded on the outer wall of the lower end of the tank. The inner fixing sleeve is fixedly installed at the lower end of the annular plate of the tank through the mounting plate B.

3. The uranium dioxide powder storage container as described in claim 2, characterized in that: The lower end of the inner fixed sleeve of the tank body is provided with a third conical surface, and correspondingly, the upper end of the outer vertical ring section of the outer protective cover is provided with a fourth conical surface for cooperating with the third conical surface.

4. The uranium dioxide powder storage container as described in claim 3, characterized in that: The inner edge of the lower inner ring plate of the outer protective cover is provided with a first conical surface, and correspondingly, the upper end of the docking housing of the outer cover disassembly and assembly device is provided with a second conical surface for cooperating with the first conical surface.

5. A method for automatically opening the lid of a uranium dioxide powder storage container, characterized in that: The method described in claim 4, which is used to remove the outer protective cover of the uranium dioxide powder storage tank, requires an overhead slide, a transport trolley, and an outer cover removal and installation device to be implemented. The overhead sliding table is fixedly installed on the ground and has a horizontal track on it. The horizontal track includes an outer cover disassembly section and a material discharge docking section. The outer cover disassembly and assembly device is fixedly installed directly below the overhead sliding platform; the outer cover disassembly and assembly device includes an electric lifting platform, an automatic self-aligning 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, and the upper end of the electric lifting platform is provided with a bearing platform; the automatic self-aligning support assembly includes a support housing, ball sockets A, balls B, a docking housing, and a limiting rod; the lower end of the support housing is fixedly installed on the bearing platform, the support housing has an inner cavity C inside, and the top of the support housing has a through hole communicating with the inner cavity C; multiple ball sockets A are fixedly installed on the top of the support housing; the balls B are rotatably installed in the ball sockets A, and the balls B correspond one-to-one with the ball sockets A, and the upper ends of all balls B are on the same horizontal plane; the docking housing has an inner cavity D inside, and the top of the docking housing has an action clearance groove communicating with the inner cavity D, and the lower end of the docking housing is supported by all the balls B; the upper end of the limiting rod is fixedly connected to the lower end of the docking housing, and the lower end of the limiting rod passes through the support housing. The rod extends into the inner cavity C of the support housing through the through-hole and is suspended in the air. An adjustment gap is provided between the outer circular surface of the limiting rod and the through-hole of the support housing. The hook action drive assembly includes a motor A, a lead screw, a nut A, a nut B, and hooks. The motor A is fixedly installed in the inner cavity D of the docking housing. The lead screw is arranged horizontally and has a first thread section and a second thread section with opposite thread directions. One end of the lead screw is directly or indirectly rotatably supported on the docking housing, and the other end is connected to the shaft of the motor A. Nuts A and B are threadedly connected to the first thread section and the second thread section of the lead screw, respectively. The two hooks are arranged in opposite directions and fixedly connected to the upper ends of nuts A and B, and both extend out of the action clearance groove of the docking housing. When the outer cover removal and assembly device docks with the outer protective cover, the two hooks move to their extreme positions in opposite directions and abut against the hook receiving grooves, respectively. When the outer cover removal and assembly device separates from the outer protective cover, the two hooks move to their extreme positions in opposite directions and both exit the hook receiving grooves. The transport trolley includes a body and a body movement drive assembly. The lower end of the body is equipped with rollers, and the upper end has multiple sets of guide wheels. Each set of guide wheels includes at least two horizontally arranged guide wheels with rotating shafts. All guide wheels in a set are arranged in a row, and the sets of guide wheels together form one or more U-shaped areas. These U-shaped areas are the placement stations, and the center of each placement station has a discharge hole for the upper rigid tube to enter or exit. The body is mounted on a horizontal track by rolling on the rollers. The body movement drive assembly includes a motor B, gears, and a rack. Motor B is fixedly mounted... Mounted on the vehicle body; the gear is fixedly mounted on the shaft of motor B; the rack is directly or indirectly fixedly mounted on the overhead slide and arranged parallel to the horizontal track, with the rack and gear meshing with each other; the vehicle body has 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 encloses the material drop hole in the placement station, and the guide plate has multiple sequentially connected ramps inside, so that the internal dimensions of the guide plate gradually decrease from top to bottom; the guide plate contacts the guide edge of the tank through the ramps, thereby guiding the storage tank; Before the automatic cap removal method is implemented: the electric lifting platform in the outer cap removal device is at the lowest point of its lifting stroke, the two hooks in the outer cap removal device are at the closest position to each other, the outer protective cap is installed on the outside of the discharge port of the tank, at this time, the outer movable sleeve is fitted onto the lower end of the outer wall of the inner fixed sleeve through the outer vertical ring section and closes the discharge port of the tank, the outer movable sleeve and the inner fixed sleeve are sealed by the sealing ring, and the ball A of the locking component is embedded in the ball receiving groove of the inner fixed sleeve, thereby realizing the axial limit between the inner fixed sleeve and the outer movable sleeve; The automatic cap removal method is as follows: S01, Alignment: The uranium dioxide powder storage tank with the outer protective cover is hoisted into the placement position of the transport trolley. During the hoisting process, the guide wheel assembly first rolls into contact with the guide edge of the tank to correct deviation. Then, the inclined surface inside the guide plate slides into contact with the guide edge of the tank to center it. Finally, the uranium dioxide powder storage tank is accurately positioned in the placement position of the transport trolley. The motor B of the transport trolley is started, driving the transport trolley and the uranium dioxide powder storage tank to move along the horizontal track to directly above the outer cover removal and installation device. At this time, the outer protective cover of the uranium dioxide powder storage tank is directly above the hook of the outer cover removal and installation device. S02, Connecting the outer protective cover: The electric lifting platform of the outer cover removal and installation device rises, so that the hooks enter the upper end of the inner hole of the lower inner ring plate of the outer protective cover and are level with the height of the hook receiving groove; Motor A starts, driving the two hooks to move back to back to the limit position and respectively abut against the hook receiving groove of the outer protective cover. S03, Remove the outer protective cover: The electric lifting platform of the outer cover removal device descends and uses two hooks to pull the outer protective cover off the inner fixed sleeve of the tank. During the separation of the outer protective cover from the inner fixed sleeve, the downward pulling force applied to the outer protective cover by the hooks causes the ball A to overcome the spring force and temporarily retract into the sleeve of the outer protective cover, thereby releasing the mutual locking state between the outer protective cover and the inner fixed sleeve, so that the outer protective cover can be smoothly pulled off the inner fixed sleeve.

6. The automatic cap-opening method for uranium dioxide powder storage tank as described in claim 5, characterized in that: In step S02 of the cover removal method, during the ascent of the electric lifting platform, the first conical surface at the lower end of the outer protective cover mates with the second conical surface at the upper end of the outer cover removal device, and the adjustment gap provided by the automatic self-aligning support component of the outer cover removal device, together play the role of centering and correction.

7. An automatic capping method for a uranium dioxide powder storage container, characterized in that: The method described in claim 4, which is used to install the outer protective cover of the uranium dioxide powder storage tank, requires an overhead slide, a transport trolley, and an outer cover disassembly and assembly device to be implemented. The overhead sliding table is fixedly installed on the ground and has a horizontal track on it. The horizontal track includes an outer cover disassembly section and a material discharge docking section. The outer cover disassembly and assembly device is fixedly installed directly below the overhead sliding platform; the outer cover disassembly and assembly device includes an electric lifting platform, an automatic self-aligning 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, and the upper end of the electric lifting platform is provided with a bearing platform; the automatic self-aligning support assembly includes a support housing, ball sockets A, balls B, a docking housing, and a limiting rod; the lower end of the support housing is fixedly installed on the bearing platform, the support housing has an inner cavity C inside, and the top of the support housing has a through hole communicating with the inner cavity C; multiple ball sockets A are fixedly installed on the top of the support housing; the balls B are rotatably installed in the ball sockets A, and the balls B correspond one-to-one with the ball sockets A, and the upper ends of all balls B are on the same horizontal plane; the docking housing has an inner cavity D inside, and the top of the docking housing has an action clearance groove communicating with the inner cavity D, and the lower end of the docking housing is supported by all the balls B; the upper end of the limiting rod is fixedly connected to the lower end of the docking housing, and the lower end of the limiting rod passes through the support housing. The rod extends into the inner cavity C of the support housing through the through-hole and is suspended in the air. An adjustment gap is provided between the outer circular surface of the limiting rod and the through-hole of the support housing. The hook action drive assembly includes a motor A, a lead screw, a nut A, a nut B, and hooks. The motor A is fixedly installed in the inner cavity D of the docking housing. The lead screw is arranged horizontally and has a first thread section and a second thread section with opposite thread directions. One end of the lead screw is directly or indirectly rotatably supported on the docking housing, and the other end is connected to the shaft of the motor A. Nuts A and B are threadedly connected to the first thread section and the second thread section of the lead screw, respectively. The two hooks are arranged in opposite directions and fixedly connected to the upper ends of nuts A and B, and both extend out of the action clearance groove of the docking housing. When the outer cover removal and assembly device docks with the outer protective cover, the two hooks move to their extreme positions in opposite directions and abut against the hook receiving grooves, respectively. When the outer cover removal and assembly device separates from the outer protective cover, the two hooks move to their extreme positions in opposite directions and both exit the hook receiving grooves. The transport trolley includes a body and a body movement drive assembly. The lower end of the body is equipped with rollers, and the upper end has multiple sets of guide wheels. Each set of guide wheels includes at least two horizontally arranged guide wheels with rotating shafts. All guide wheels in a set are arranged in a row, and the sets of guide wheels together form one or more U-shaped areas. These U-shaped areas are the placement stations, and the center of each placement station has a discharge hole for the upper rigid tube to enter or exit. The body is mounted on a horizontal track by rolling on the rollers. The body movement drive assembly includes a motor B, gears, and a rack. Motor B is fixedly mounted... Mounted on the vehicle body; the gear is fixedly mounted on the shaft of motor B; the rack is directly or indirectly fixedly mounted on the overhead slide and arranged parallel to the horizontal track, with the rack and gear meshing with each other; the vehicle body has 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 encloses the material drop hole in the placement station, and the guide plate has multiple sequentially connected ramps inside, so that the internal dimensions of the guide plate gradually decrease from top to bottom; the guide plate contacts the guide edge of the tank through the ramps, thereby guiding the storage tank; Before the automatic capping method is executed: the outer protective cap is connected to the upper end of the outer cap removal and installation device. At this time, the two hooks of the outer cap removal and installation device are at the farthest position from each other, and the two hooks respectively abut against the hook receiving groove of the outer protective cap; the electric lifting platform in the outer cap removal and installation device is at the lowest point of its lifting stroke. The automatic capping method is as follows: S01, Alignment: The uranium dioxide powder storage tank with the outer protective cover is hoisted into the placement position of the transport trolley. During the hoisting process, the guide wheel assembly first rolls into contact with the guide edge of the tank to correct deviation. Then, the inclined surface inside the guide plate slides into contact with the guide edge of the tank to center it. Finally, the uranium dioxide powder storage tank is accurately positioned in the placement position of the transport trolley. The motor B of the transport trolley is started, driving the transport trolley and the uranium dioxide powder storage tank to move along the horizontal track to directly above the outer cover removal and installation device. At this time, the outer protective cover is directly below the discharge port of the tank. S02, Install the outer protective cover: The electric lifting platform of the outer cover removal and installation device rises, driving the outer protective cover to move upward, so that the outer movable sleeve is inserted into the lower end of the outer wall of the inner fixed sleeve through the outer vertical ring section and closes the discharge port of the tank; when the outer protective cover moves upward until the ball A of the locking component is aligned with the ball receiving groove of the inner fixed sleeve, the ball A of the locking component is then embedded in the ball receiving groove of the inner fixed sleeve under the elastic force of the spring, thereby realizing the axial limit between the inner fixed sleeve and the outer movable sleeve.

8. The automatic capping method for uranium dioxide powder storage containers as described in claim 7, characterized in that: In step S02 of the capping method, the outer movable sleeve and the inner fixed sleeve are sealed by a sealing ring. The structure in which the third conical surface at the lower end of the inner fixed sleeve of the tank body matches the fourth conical surface at the upper end of the outer vertical ring section of the outer protective cover, as well as the adjustment gap provided by the automatic self-aligning support assembly of the outer cover disassembly and assembly device, together play the role of centering and correction.

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