A shielding device for transporting a radioactive waste barrel

Abstract

The present application relates to radioactive waste barrel transport device technical field, particularly to a kind of shielding device for transporting radioactive waste barrel, comprising: shielding barrel, the receiving space for receiving radioactive waste barrel is provided in the shielding barrel;Shielding cover, detachably disposed on the shielding barrel, and sealingly connected with the shielding barrel;Gripper mechanism, for grabbing the barrel cover of radioactive waste barrel located in the receiving space;Dismounting mechanism, for removing the fastener connected between the barrel cover and barrel body of radioactive waste barrel.The scheme can be in the case where remote control fails, without power access, by manual on-site to the radioactive waste barrel dismounting fastener and take cover operation, with high flexibility and safety, convenient operation, not limited by position condition and equipment condition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radioactive waste barrel transfer device, and particularly relates to a shielding device for transferring radioactive waste barrels. BACKGROUND

[0002] During the operation of a nuclear power plant, some radioactive waste is generated, which needs to be packed into standard steel barrels and then cemented or transported to a storage area. At present, the opening and closing of the radioactive waste barrel with radioactive substances in a nuclear power plant are both realized by using a remote automatic opening and closing device, and the radioactive steel barrel is transported by using a simple container with shielding effect. However, when the automatic opening and closing device is unavailable due to power failure or other reasons, the radioactive waste barrel cannot be opened and closed on site, which directly affects the efficiency of waste treatment in the nuclear power plant. SUMMARY

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a shielding device for transferring radioactive waste barrels, which is used to solve the problem that the steel barrel cannot be opened in the prior art when the automatic opening and closing device is unavailable.

[0004] To achieve the above-mentioned purpose and other related purposes, the present application provides a shielding device for transferring radioactive waste barrels, comprising:

[0005] A shielding barrel, wherein a receiving space for receiving a radioactive waste barrel is arranged in the shielding barrel;

[0006] A shielding cover, which is detachably arranged on the shielding barrel and is in sealing connection with the shielding barrel;

[0007] A grab mechanism, which is used to grab the barrel cover of the radioactive waste barrel located in the receiving space, and comprises a grabbing assembly and an operating assembly. The grabbing assembly is located in the receiving space, the operating assembly is arranged on the shielding cover, the upper part of the operating assembly is located outside the receiving space, the lower part of the operating assembly is located in the receiving space and is in transmission connection with the grabbing assembly, and the operating assembly is in sealing connection with the shielding cover;

[0008] A dismounting mechanism, which is used to dismount the fastener connecting the barrel cover and the barrel body of the radioactive waste barrel, and is arranged on the shielding cover and is in sealing connection with the shielding cover. The upper part of the dismounting mechanism is located outside the receiving space, and the lower part of the dismounting mechanism is located in the receiving space.

[0009] Optionally, the grabbing assembly comprises a plurality of telescopic claws, and each telescopic claw is synchronously radially telescoped or retracted by horizontal rotation of the operating assembly to grab or release the barrel cover of the radioactive waste barrel located in the receiving space.

[0010] Optionally, the grabbing assembly further comprises a transmission unit and a supporting unit, the operating assembly and the grabbing assembly are drivingly connected through the transmission unit, the transmission unit comprises a rotating base and a plurality of connecting plates, the supporting unit comprises a supporting plate and a plurality of supporting bases, each of the supporting bases is arranged on a side of the shielding cover facing the shielding barrel, the supporting plate has supporting legs capable of extending into each of the supporting bases, the rotating base is horizontally rotatably arranged on the supporting plate, each of the telescopic claws is movably arranged on each of the supporting legs along the extending direction of the supporting legs, the first ends of each of the connecting plates are hingedly connected to the rotating base, the hinge points of the hinged connection are uniformly distributed along the circumference of the rotating base, and the second ends of each of the connecting plates are correspondingly hingedly connected to each of the telescopic claws.

[0011] Optionally, the shielding cover is rotatably arranged on the shielding barrel along an axis thereof, the dismounting mechanism comprises a positioning assembly and a dismounting assembly, the positioning assembly and the dismounting assembly are arranged through the shielding cover, the lower parts of the positioning assembly and the dismounting assembly are located in the receiving space, and the dismounting assembly is aligned with the other fastener when the positioning assembly abuts against one of the two adjacent fasteners.

[0012] Optionally, the positioning assembly comprises a positioning rod, a first retaining element and a first shaft sleeve, the first shaft sleeve is arranged through the shielding cover, the first retaining element is connected to the first shaft sleeve and is sleeved on the outer wall of the positioning rod, the positioning rod is movably arranged in the first shaft sleeve and the first retaining element along an axial direction, the first retaining element moves the positioning rod along the axial direction between a first position and a second position, the outer wall of the positioning rod is capable of abutting against the fastener under the rotation of the shielding cover along the axis thereof when the positioning rod is located at the first position, and the positioning rod is away from the fastener when the positioning rod is located at the second position.

[0013] Optionally, an annular scale disc is arranged on the end face of the open end of the receiving space of the shielding barrel, and the scale disc is coaxially arranged with the shielding barrel.

[0014] Optionally, a plurality of roller assemblies are uniformly distributed on the outer side wall of the shielding cover along a circumferential direction, and the shielding cover is rotatably arranged on the shielding barrel along the axis thereof through the roller assemblies.

[0015] Optionally, the dismounting assembly comprises a second retaining element, a second shaft sleeve, a sliding shaft and a dismounting piece, the dismounting piece is in transmission connection with the sliding shaft, the second shaft sleeve is arranged in the shielding cover, the second retaining element is connected to the second shaft sleeve and is sleeved on the outer wall of the sliding shaft, the sliding shaft is rotatable along its own axis and is arranged in the second retaining element and the second shaft sleeve in axial movement, the second axial positioning element moves the sliding shaft between the third position and the fourth position, when the sliding shaft is in the third position, the sliding shaft can drive the dismounting piece to dismount the fastener, and when the sliding shaft is in the fourth position, the sliding shaft drives the dismounting piece to move away from the fastener.

[0016] Optionally, the shielding device for transporting radioactive waste barrels further comprises a positioning pin assembly for limiting the shielding cover in the axial direction of the shielding cover, the number of the positioning pin assemblies is at least two groups arranged opposite in the circumferential direction of the shielding barrel, the positioning pin assembly comprises a third retaining element and a pin shaft, the pin shaft is movably arranged on the shielding barrel in the radial direction of the shielding barrel and can enter and exit the shielding cover, the third retaining element is connected to the shielding barrel and is sleeved on the pin shaft, the third retaining element moves the pin shaft in the radial direction of the shielding barrel between the fifth position and the sixth position, when the pin shaft is in the fifth position, the shielding cover is locked in the axial direction with the shielding barrel, and when the pin shaft is in the sixth position, the shielding cover is unlocked in the axial direction with the shielding barrel.

[0017] Optionally, the inner side wall of the shielding barrel is uniformly distributed with a plurality of guide blocks in the circumferential direction, and the inner bottom wall of the shielding barrel is provided with a support table.

[0018] As described above, the shielding device for transporting radioactive waste barrels of the present application has the following beneficial effects:

[0019] The gripper mechanism and the dismounting mechanism of the present scheme are respectively in sealed connection with the shielding cover, which can ensure the safety during operation. By operating the dismounting mechanism outside the shielding barrel, the fastener connecting the barrel cover and the barrel body of the radioactive waste barrel can be manually dismounted before the shielding cover is opened. By operating the operating assembly outside the shielding barrel, the gripper assembly can be driven to grasp and release the barrel cover of the radioactive waste barrel located in the storage space. Then the device grasps the shielding cover, and in the process of lifting the shielding cover, the barrel cover of the radioactive waste barrel is lifted synchronously with the shielding cover, so that the barrel cover of the radioactive waste barrel is opened.

[0020] The present scheme can dismount the fastener and take off the cover of the radioactive waste barrel manually on site in the case of remote control failure and without power supply connection, has high flexibility and safety, is convenient to operate, and is not limited by location conditions and equipment conditions. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of an embodiment of the application;

[0022] Figure 2 is a schematic diagram of the shielded bucket structure of an embodiment of the application;

[0023] Figure 3 is a perspective view of a shielded lid at one angle of an embodiment of the application;

[0024] Figure 4 is a perspective view of a shielded lid at another angle of an embodiment of the application;

[0025] Figure 5 is a top view of a shielded lid of an embodiment of the application;

[0026] Figure 6 is a cross-sectional view of a shielded lid of an embodiment of the application;

[0027] Figure 7 is a schematic diagram of the structure of a gripping assembly of an embodiment of the application;

[0028] Figure 8 is a schematic diagram of the structure of a positioning assembly of an embodiment of the application;

[0029] Figure 9 is a schematic diagram of the installation of a disassembly assembly of an embodiment of the application;

[0030] Figure 10 is a schematic diagram of the structure of a disassembly assembly of an embodiment of the application;

[0031] Figure 11 is Figure 10 is a cross-sectional view at B-B;

[0032] Figure 12 is a schematic diagram of the idle state of a disassembly mechanism of an embodiment of the application;

[0033] Figure 13 is a schematic diagram of the state after the downward pressing of a positioning assembly of an embodiment of the application;

[0034] Figure 14 is a schematic diagram of the state after the downward pressing of a positioning assembly of an embodiment of the application and the abutting against a fastener;

[0035] Figure 15 is a schematic diagram of the state of a disassembly assembly of an embodiment of the application when disassembling a fastener;

[0036] Figure 16 is a schematic diagram of the structure of a dial of an embodiment of the application;

[0037] Figure 17A-A sectional view of the positioning pin assembly structure of the embodiment of the present application;

[0038] Figure 18 For Figure 17 A-A sectional view of the positioning pin assembly structure of the embodiment of the present application;

[0039] Part number explanation

[0040] 1 - shielding barrel; 11 - dial; 12 - guide block; 13 - support table; 14 - shielding barrel groove; 2 - shielding cover; 21 - lifting ring; 22 - roller assembly; 23 - arrow; 24 - shielding cover groove; 3 - radioactive waste barrel; 31 - barrel cover; 4 - gripper mechanism; 41 - operation assembly; 411 - first sleeve wrench; 412 - rotating shaft; 42 - gripping assembly; 421 - retractable claw; 422 - rotating seat; 423 - support plate; 424 - support seat; 425 - connecting plate; 5 - dismounting mechanism; 51 - dismounting assembly; 511 - sliding shaft; 511a - fourth positioning ring groove; 511b - third positioning ring groove; 512 - dismounting piece; 513 - second shaft sleeve; 514 - second retaining element; 515 - second sleeve wrench; 516 - shaft coupling; 52 - positioning assembly; 521 - positioning rod; 521a - first positioning ring groove; 521b - second positioning ring groove; 522 - first retaining element; 523 - first shaft sleeve; 524 - locking nut; 525 - linear bearing; 6 - spring pin; 7 - fastener; 8 - positioning pin assembly; 81 - plug shaft; 811a - sixth positioning ring groove; 811b - fifth positioning ring groove; 82 - third retaining element. DETAILED DESCRIPTION

[0041] The present application is herein described, by way of example only, with reference to certain embodiments thereof. It is contemplated that the application described herein will apply to any and all equivalents thereof. Modifications of the application as described herein will occur to those skilled in the art upon reading of this description. It is intended that the scope of the application disclosed herein be defined by the claims which follow, and be interpreted in accordance with the principles of patent law.

[0042] It should be noted that the drawings provided in the embodiments only schematically illustrate the basic concepts of the present application, and only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape and size of the components in actual implementation. The shape, number and proportion of each component in actual implementation can be arbitrarily changed, and the component layout pattern can be more complex. The structure, proportion, size and the like shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the defined conditions under which the present application can be implemented, and therefore do not have technical substantive significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope covered by the disclosed technical content of the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the present specification are only for the convenience of clear description, and are not used to limit the scope in which the present application can be implemented. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope in which the present application can be implemented.

[0043] Please refer to Figures 1 to 18 The present embodiment provides a shielding device for transporting radioactive waste barrels, which comprises a shielding barrel 1, and a receiving space for receiving radioactive waste barrels is arranged in the shielding barrel 1, that is, the inner cavity of the shielding barrel 1;

[0044] A shielding cover 2 is detachably arranged on the shielding barrel 1;

[0045] A grab mechanism 4 is used to grab or release the barrel cover 31 of the radioactive waste barrel located in the receiving space. The grab mechanism 4 comprises a grabbing assembly 42 and an operating assembly 41. The grabbing assembly 42 is located in the receiving space, the operating assembly 41 is arranged on the shielding cover 2, the upper part of the operating assembly 41 is located outside the receiving space, the lower part of the operating assembly 41 is located in the receiving space and is in transmission connection with the grabbing assembly 42, and the operating assembly 41 is in sealing connection with the shielding cover 2;

[0046] A dismounting mechanism 5 is used to dismount the fastener 7 connecting the barrel cover 31 and the barrel body of the radioactive waste barrel. The dismounting mechanism 5 is arranged on the shielding cover 2 and is in sealing connection with the shielding cover 2. The upper part of the dismounting mechanism 5 is located outside the receiving space, and the lower part of the dismounting mechanism 5 is located in the receiving space.

[0047] The shielding barrel 1 is in the shape of a cylinder and has an inner cavity. The top of the shielding barrel 1 is open, that is, the inner cavity of the top of the shielding barrel 1 can be communicated with the outside. The shielding cover 2 is detachably arranged on the top opening of the shielding barrel 1, so as to close the inner cavity of the top of the shielding barrel 1. The outer side wall of the shielding cover 2 is in sealing connection with the inner side wall of the shielding barrel 1. The shielding cover 2 and the shielding barrel 1 can be connected by a detachable connection mode such as threaded connection or pin connection.

[0048] In one embodiment, as shown in Figure 1 and Figure 2 , the inner wall top of the shielding barrel 1 is provided with a shielding cover positioning step for positioning and fixing the shielding cover 2 in the vertical direction, the bottom of the shielding cover 2 abuts against the bottom wall of the shielding cover positioning step to prevent the shielding cover 2 from moving further into the inner cavity of the shielding barrel 1, and the axial direction of the shielding barrel 1 is the vertical direction in Figure 1 and Figure 2 .

[0049] The top of the shielding cover 2 and the barrel cover 31 of the radioactive waste barrel are both provided with a lifting ring 21, the shielding cover 2 can be grabbed and lifted through the lifting ring 21 of the shielding cover 2, and the barrel cover 31 of the radioactive waste barrel can be grabbed and lifted through the lifting ring 21 of the barrel cover 31 of the radioactive waste barrel, so as to realize the opening of the shielding device and the barrel cover 31 of the radioactive waste barrel.

[0050] The gripper mechanism 4 includes a grabbing assembly 42 and an operating assembly 41. The upper part of the operating assembly 41 is located above the shielding cover 2, i.e. when the shielding cover 2 is installed on the shielding barrel 1, the upper part of the operating assembly 41 is located outside the storage space. The grabbing assembly 42 is located below the shielding cover 2, i.e. when the shielding cover 2 is installed on the shielding barrel 1, the grabbing assembly 42 is located inside the storage space. The operating assembly 41 passes through the shielding cover 2 in the axial direction of the shielding cover 2 and is in transmission connection with the grabbing assembly 42, and the operating assembly 41 can be understood as a power input end, and the grabbing assembly 42 is a power output end. By operating the operating assembly 41 outside the shielding barrel 1, the grabbing assembly 42 inside the shielding barrel 1 can be driven to perform the opening and closing operations of the barrel cover 31 of the radioactive waste barrel. The operating assembly 41 can be directly operated manually by hand, or can be operated by hand holding an auxiliary tool such as an electric drill, so that the use range of the embodiment is wider. Exemplarily, the operating assembly 41 is arranged at the middle part of the shielding cover 2.

[0051] The barrel cover 31 of the radioactive waste barrel is usually connected with the barrel body by a fastener 7 such as a bolt, and the dismounting mechanism 5 can manually dismount the fastener 7 connected between the barrel cover 31 of the radioactive waste barrel and the barrel body when the shielding cover 2 is not opened.

[0052] The upper part of the dismounting mechanism 5 is located outside the storage space, and the lower part is located inside the storage space. The dismounting mechanism 5 is arranged on the shielding cover 2 in the vertical direction and is in sealed connection with the shielding cover 2.

[0053] The gripper mechanism 4 and the dismounting mechanism 5 are respectively in sealing connection with the shielding cover 2, so that the safety during operation can be ensured. When the shielding cover 2 has not been opened, the fastener 7 connected between the barrel cover 31 and the barrel body of the radioactive waste barrel can be manually removed by operating the dismounting mechanism 5 outside the shielding barrel 1. By operating the operation assembly 41 outside the shielding barrel 1, the barrel cover 31 of the radioactive waste barrel in the storage space can be gripped and released by the gripping assembly 42. Then the device grips the shielding cover 2, and in the process of lifting the shielding cover 2, the barrel cover 31 of the radioactive waste barrel is lifted synchronously with the shielding cover 2, so that the opening of the barrel cover 31 of the radioactive waste barrel is realized.

[0054] The embodiment can manually dismount the fastener 7 and take the cover of the radioactive waste barrel on site in the case of remote control failure and without power supply access, has high flexibility and safety, is convenient to operate, and is not limited by location conditions and equipment conditions.

[0055] In one embodiment, as shown in Figure 6 and Figure 7 The gripping assembly 42 includes a plurality of telescopic claws 421, and the operation assembly 41 is horizontally rotated to drive the plurality of telescopic claws 421 to synchronously expand or retract along the radial direction, so as to grip and release the barrel cover 31 of the radioactive waste barrel in the storage space. The telescopic claws 421 can be horizontally arranged telescopic plates, which can be inserted below the lifting ring 21 on the barrel cover 31 of the radioactive waste barrel when the plurality of telescopic claws 421 synchronously expand along the radial direction. When the gripping assembly 42 is lifted, the top surface of the telescopic claw 421 abuts against the bottom surface of the lifting ring 21 on the barrel cover 31 of the radioactive waste barrel, so as to pull up the barrel cover 31 of the radioactive waste barrel. When the plurality of telescopic claws 421 synchronously retract along the radial direction, the plurality of telescopic claws 421 exit below the lifting ring 21 on the barrel cover 31 of the radioactive waste barrel, so as to release the barrel cover 31 of the radioactive waste barrel. The above structure is simple and has low cost. The plurality of telescopic claws 421 synchronously expand and retract, so that the gripping is stable and the problems of interference and failure are less likely to occur.

[0056] In one embodiment, as shown in Figure 6 and Figure 7As shown, the grabbing assembly 42 further comprises a transmission unit and a supporting unit, the operating assembly 41 and the grabbing assembly 42 are drivingly connected through the transmission unit, the transmission unit comprises a rotating seat 422 and a plurality of connecting plates 425, the supporting unit comprises a supporting plate 423 and a plurality of supporting seats 424, each supporting seat 424 is arranged on the side of the shielding cover 2 facing the shielding barrel 1, the supporting plate 423 has supporting legs capable of extending into each supporting seat 424, the rotating seat 422 is horizontally rotatably arranged on the supporting plate 423, each telescopic claw 421 is movably arranged on each supporting leg in the extension direction of the supporting leg, respectively, the first end of each connecting plate 425 is hingedly connected to the rotating seat 422, the hinge points of the hinged connection are uniformly distributed along the top surface of the rotating seat 422, and the second end of each connecting plate 425 is hingedly connected to each telescopic claw 421, respectively.

[0057] The operating assembly 41 comprises a rotating shaft 412 arranged vertically and a first sleeve wrench 411, the bottom of the first sleeve wrench 411 is sleeved on the top of the rotating shaft 412, the shape of the bottom of the first sleeve wrench 411 is the same as that of the top of the rotating shaft 412, so that the first sleeve wrench 411 can drive the rotating shaft 412 to rotate along its own axis. The rotating shaft 412 and the first sleeve wrench 411 are arranged on the shielding cover 2 through a shaft sleeve, the rotating shaft 412 is arranged concentrically with the shielding cover 2, which facilitates the alignment of the grab mechanism 4 and the barrel cover 31 of the radioactive waste barrel. The rotating seat 422 is provided with a vertical stand, a transmission hole matched with the bottom of the rotating shaft 412 is formed in the top of the stand, the shape of the bottom of the rotating shaft 412 is the same as that of the transmission hole, and the bottom of the rotating shaft 412 is arranged in the transmission hole. Through the cooperation between the bottom of the rotating shaft 412 and the transmission hole, the rotating shaft 412 can drive the rotating seat 422 to rotate synchronously when the rotating shaft 412 rotates along its own axis. In this way, the first sleeve wrench 411, the rotating shaft 412 and the rotating seat 422 can be sequentially disassembled conveniently. The transmission hole can be elliptical, triangular, quadrilateral, etc., but cannot be circular.

[0058] The rotating seat 422 is rotatably arranged on the support plate 423 along the axis of the column. The rotating seat 422 can be in the shape of a cylinder, a triangular body, a cuboid, a square body, etc. The first end of each connecting plate 425 is hingedly connected to the top surface of the rotating seat 422, and the hinge points are uniformly distributed along the circumference of the top surface of the rotating seat 422. The second end of each connecting plate 425 is hingedly connected to one end of the retractable claw 421 that is closer to the inside of the radial direction of the shielding cover 2. The support plate 423 has a long strip shape and a plurality of support legs extending in the radial direction of the shielding cover 2, and the number of support legs is the same as the number of retractable claws 421, the number of connecting plates 425, and the number of support seats 424. The support seat 424 is arranged on the bottom surface of the shielding cover 2, and each support seat 424 is uniformly distributed along the circumference of the bottom surface of the shielding cover 2. Each support leg corresponds to extend into each support seat 424, and the retractable claw 421 is movably arranged on the support leg in the extension direction of the support leg (also in the radial direction of the shielding cover 2), and one support leg corresponds to one retractable claw 421. Thus, when the first sleeve wrench 411 drives the rotating shaft 412 to rotate, the rotating shaft 412 drives the rotating seat 422 to rotate, and the rotating seat 422 rotates by pulling each retractable claw 421 to extend or retract through each connecting plate 425. The above structure is simple, low in cost, and high in transmission efficiency, thereby improving the cover opening efficiency.

[0059] In one embodiment, as shown in Figure 8 and Figure 9 The shielding cover 2 is rotatably arranged on the shielding barrel 1 along the axis of the shielding cover 2, and the disassembly mechanism 5 includes a positioning assembly 52 and a disassembly assembly 51. The positioning assembly 52 and the disassembly assembly 51 are both arranged on the shielding cover 2, and the lower part of the positioning assembly 52 and the lower part of the disassembly assembly 51 are both located in the storage space. When the positioning assembly 52 abuts against one of the two adjacent fasteners 7, the disassembly assembly 51 is vertically opposite to the other fastener 7. The opposite and the alignment have the same meaning, which means that the disassembly assembly 51 only needs to move downward to disassemble the fastener 7, without moving in other directions.

[0060] Generally, the fasteners 7 connecting the lid 31 and the barrel body of the radioactive waste barrel are evenly distributed along the circumference of the lid 31 of the radioactive waste barrel and are arranged on the same circle. The circumferential positions of the positioning assembly 52 and the removal assembly 51 on the shielding cover 2 correspond to the circumferential positions of the fasteners 7, that is, the positioning assembly 52 and the removal assembly 51 are on the same circle, and the positioning assembly 52 and the removal assembly 51 are also on the same circle as the fasteners 7. When the shielding cover 2 rotates along its own axis, the positioning assembly 52 can be in contact with one of the fasteners 7, at this time, the removal assembly 51 is opposite to one of the fasteners 7, and the removal assembly 51 can remove the fastener 7. Repeating the above steps can remove all fasteners 7. The positioning assembly 52 can quickly position the fasteners 7 and improve the removal efficiency of the fasteners 7, thereby improving the overall opening efficiency.

[0061] In one embodiment, as shown in Figure 8 The positioning assembly 52 includes a positioning rod 521, a first retaining element 522, and a first shaft sleeve 523. The first shaft sleeve 523 is arranged in the shielding cover 2. The first retaining element 522 is connected to the first shaft sleeve 523 and is sleeved on the outer wall of the positioning rod 521. The positioning rod 521 is arranged in the first shaft sleeve 523 and the first retaining element 522 in an axially movable manner. The first retaining element 522 moves the positioning rod 521 in the axial direction between a first position and a second position. When the positioning rod 521 is in the first position, the outer wall of the positioning rod 521 can be in contact with the fastener 7 under the rotation of the shielding cover 2 along its own axis. When the positioning rod 521 is in the second position, the positioning rod 521 is away from the fastener 7.

[0062] The shielding cover 2 is provided with a stepped hole in the vertical direction, the first shaft sleeve 523 is sealingly and vertically arranged in the shielding cover 2, and the top of the first shaft sleeve 523 is provided with a flange, the bottom end surface of the flange abuts against the bottom wall of the stepped hole, and the side wall of the flange abuts against the inner wall of the stepped hole, thereby limiting the first shaft sleeve 523 in the circumferential and radial directions of the shielding cover 2, so as to ensure the accuracy of the positioning of the positioning rod 521. The first retaining element 522 is concentrically arranged on the top surface of the first shaft sleeve 523, and the positioning rod 521 sequentially passes through the first retaining element 522 and the first shaft sleeve 523 from top to bottom, that is, the first retaining element 522 and the first shaft sleeve 523 are sequentially sleeved on the outer wall of the positioning rod 521 from top to bottom. The positioning rod 521 can rotate along the axis thereof in the first retaining element 522 and the first shaft sleeve 523, and can also move in the axial direction of the shielding cover 2. The first retaining element 522 enables the positioning rod 521 to move between the first position and the second position in the axial direction of the positioning rod 521. When the positioning rod 521 is located at the first position, the height of the bottom end of the positioning rod 521 is less than the height of the top end of the fastener 7, so that the shielding cover 2 is rotated, and the outer wall of the positioning rod 521 can abut against the outer wall of the fastener 7. When the positioning rod 521 is located at the second position, the height of the bottom end of the positioning rod 521 is greater than the height of the top end of the fastener 7, so that no matter how the shielding cover 2 is rotated, the outer wall of the positioning rod 521 cannot contact the outer wall of the fastener 7.

[0063] In one example embodiment, as shown in Figure 8 The positioning rod 521 is provided with a first positioning ring groove 521a and a second positioning ring groove 521b, and the first positioning ring groove 521a is located above the second positioning ring groove 521b. The first retaining element 522 is a ring-shaped positioning pin seat, and each spring pin 6 is uniformly distributed along the circumferential direction of the positioning pin seat. The spring pin 6 is arranged in the radial direction of the first retaining element 522 and the first end can pass through the inner wall of the first retaining element 522, the first end of the spring pin 6 can enter and exit the first positioning ring groove 521a, and the first end of the spring pin 6 can also enter and exit the second positioning ring groove 521b.

[0064] As shown in Figures 12 to 16 When the positioning rod 521 is in the lifting state, the positioning rod 521 is pressed downward, the positioning rod 521 moves downward, the first end of the spring pin 6 enters the first positioning ring groove 521a, at this time the positioning rod 521 is located at the first position, the height of the bottom end of the positioning rod 521 is lower than the height of the top end of the fastener 7, and the bottom end of the positioning rod 521 can abut against the top end of the fastener 7. The shielding cover 2 is rotated, so that the bottom end of the positioning rod 521 abuts against one of the two adjacent fasteners 7 (the first fastener 7), at this time the disassembly assembly 51 is opposite to the other one of the two adjacent fasteners 7 (the second fastener 7), and the disassembly assembly 51 can disassemble the fastener 7 opposite thereto.

[0065] After the positioning of the fastener 7 is completed, the positioning rod 521 is lifted up, the first end of the spring pin 6 exits from the first positioning ring groove 521a and enters the second positioning ring groove 521b, at this time, the positioning rod 521 is located at the second position, the height of the bottom end of the positioning rod 521 is higher than the height of the top end of the fastener 7, and the bottom end of the positioning rod 521 cannot contact the top end of the fastener 7. Turn the shielding cover 2, the positioning rod 521 continues to rotate with the shielding cover 2, the positioning rod 521 bypasses the first fastener 7, and then the positioning rod 521 is pressed downward so that the positioning rod 521 abuts against the third fastener 7 (the first fastener 7 is located between the second fastener 7 and the third fastener 7 in the circumferential direction), at this time, the dismounting assembly 51 is opposite to the first fastener 7 and can be dismounted, and the above dismounting steps are repeated to dismount the fastener 7.

[0066] In one embodiment, as shown in Figure 8 , the bottom end of the positioning rod 521 is sleeved with a locking nut 524, which can prevent the positioning rod 521 from being pulled out upward from the first shaft sleeve 523. A linear bearing 525 is arranged between the positioning rod 521 and the first shaft sleeve 523, which can make the movement of the positioning rod 521 along the axial direction more smooth.

[0067] In one exemplary embodiment, as shown in Figure 8 , the first retaining element 522 is a ring-shaped positioning pin mounting seat, and the inner wall of the positioning pin mounting seat is provided with elastic protrusions, which are at least two oppositely arranged along the circumferential direction of the inner wall, or a ring of elastic protrusions is continuously arranged along the circumferential direction of the inner wall. The elastic protrusions can enter and exit the first positioning ring groove 521a and the second positioning ring groove 521b.

[0068] In one embodiment, as shown in Figure 2 and Figure 16 , an annular scale disc 11 is arranged on the end face of the open end of the receiving space of the shielding barrel 1, and the scale disc 11 is coaxially arranged with the shielding barrel 1. An arrow 23 is arranged on the top edge of the shielding cover 2, and the arrow 23 points to the scale on the scale disc 11, which facilitates the alignment of the scale on the scale disc 11. The circumferential distance between the arrow 23 and the dismounting piece 512 of the dismounting assembly 51 is equal to the circumferential distance between two adjacent fasteners 7. That is, when the arrow 23 is circumferentially aligned with one of the two adjacent fasteners 7, the dismounting piece 512 is vertically opposite to the other of the two adjacent fasteners 7.

[0069] The dial 11 is annular and is arranged on the top end surface of the shielding barrel 1. The dial 11 is rotatable along its own axis and serves as a marker. The number of scales on the dial 11 is equal to the number of fasteners 7 and is evenly distributed in the circumferential direction. That is, each scale on the dial 11 corresponds to the position of one fastener 7. When the fasteners 7 are removed to the last one, it is inconvenient to locate the last one. Therefore, the dial 11 can be used for marking. For example, when the last two fasteners 7 are removed and one of them is removed, the dial 11 is rotated so that one of the scales is aligned with the fastener 7 to be removed. Then, the next scale adjacent to the scale on the dial 11 is aligned with the position of the last fastener 7. By arranging the dial 11, the last fastener 7 can be quickly located and removed.

[0070] In one embodiment, as shown in Figure 3 and Figure 4 The outer side wall of the shielding cover 2 is circumferentially evenly distributed with a roller assembly 22, and the shielding cover 2 is rotatably arranged on the shielding barrel 1 along its own axis through the roller assembly 22.

[0071] The roller assembly 22 includes a roller that can rotate 360 degrees, which facilitates the rotation of the shielding cover 2 on the shielding barrel 1. The outer side wall of the shielding cover 2 is circumferentially evenly distributed with a groove, and each roller assembly 22 is arranged in each groove, and the roller can abut against the inner side wall of the shielding barrel 1.

[0072] In one embodiment, as shown in Figure 10 and Figure 11 The removal assembly 51 includes a second retaining element 514, a second shaft sleeve 513, a sliding shaft 511, and a removal piece 512. The removal piece 512 is in transmission connection with the sliding shaft 511. The second shaft sleeve 513 is arranged in the shielding cover 2. The second retaining element 514 is connected to the second shaft sleeve 513 and is sleeved on the outer wall of the sliding shaft 511. The sliding shaft 511 is rotatably and axially movably arranged in the second retaining element 514 and the second shaft sleeve 513. The second axial positioning element moves the sliding shaft 511 between the third position and the fourth position. When the sliding shaft 511 is located at the third position, the sliding shaft 511 can drive the removal piece 512 to remove the fastener 7. When the sliding shaft 511 is located at the fourth position, the sliding shaft 511 drives the removal piece to move away from the fastener 7.

[0073] The disassembly component 512 is a sleeve, and the shape of the hole in the sleeve is the same as the head shape of the fastener 7, but neither of them is circular. The second bushing 513 is vertically inserted into the shielding cover 2, and the second bushing 513 and the shielding cover 2 are sealed together. The shielding cover 2 is provided with a stepped hole, and the outer side wall of the top of the second bushing 513 is provided with a flange. The bottom end face of the flange of the second bushing 513 abuts against the bottom wall of the stepped hole, and the outer side wall of the flange of the second bushing 513 abuts against the inner side wall of the stepped hole, thereby positioning the second bushing 513 along its axial and radial directions. The second retaining element 514 is concentrically arranged on the top of the second bushing 513. The sliding shaft 511 passes through the second retaining element 514 and the second bushing 513 sequentially from top to bottom. The sliding shaft 511 is rotatably disposed in the second retaining element 514 and the second bushing 513 along its own axis and movable along the axial direction of the sliding shaft 511. The bottom end of the sliding shaft 511 is connected to the disassembly component 512 via a coupling 516, allowing the disassembly component 512 to rotate along its own axis and move axially along the sliding shaft 511. The disassembly component 512 is located within the storage space. The top end of the sliding shaft 511 is connected to the second socket wrench 515, facilitating the rotation of the sliding shaft 511.

[0074] In one exemplary embodiment, such as Figure 11 As shown, the sliding shaft 511 is provided with a third positioning ring groove 511b and a fourth positioning ring groove 511a, with the third positioning ring groove 511b located above the fourth positioning ring groove 511a. The second retaining element 514 is an annular positioning pin mounting seat, with each spring pin 6 (spring plunger) evenly distributed along the circumference of the positioning pin mounting seat. The spring pins 6 are arranged radially along the second retaining element 514, and their first ends can protrude through the inner wall of the second retaining element 514. The first ends of the spring pins 6 can enter and exit the third positioning ring groove 511b, and the first ends of the spring pins 6 can also enter and exit the fourth positioning ring groove 511a.

[0075] When the sliding shaft 511 is in the raised state, press down on the sliding shaft 511. The sliding shaft 511 moves downward and the first end of the spring pin 6 enters the third positioning ring groove 511b. At this time, the sliding shaft 511 is in the third position. The disassembly part 512 also descends with the sliding shaft 511 and removes the fastener 7.

[0076] After a fastener 7 is removed, the sliding shaft 511 is lifted upwards, and the first end of the spring pin 6 exits from the third positioning ring groove 511b and enters the fourth positioning ring groove 511a. At this time, the sliding shaft 511 is in the fourth position, and the sliding shaft 511 drives the disassembled part 512 to move upwards away from the position of the fastener 7.

[0077] In one exemplary embodiment, each time a fastener 7 is removed, the removal assembly 51 can be removed as a whole from the shielding cover 2 upward, and after the fastener 7 is removed from the removal assembly 51, the removal assembly 51 is installed to the shielding cover 2.

[0078] In one exemplary embodiment, as shown in Figure 11 The second retaining element 514 is a ring-shaped positioning pin seat, and the inner wall of the second retaining element 514 is provided with elastic protrusions, which are at least two oppositely arranged along the circumferential direction of the inner wall of the second retaining element 514, or a ring of elastic protrusions is continuously arranged along the circumferential direction of the inner wall of the second retaining element 514. The elastic protrusions can enter and exit the third positioning ring groove 511b and the fourth positioning ring groove 511a.

[0079] In one embodiment, as shown in Figure 17 and Figure 18 The shielding device for transporting the radioactive waste barrel further comprises a positioning pin assembly 8 for limiting the shielding cover 2 along the axial direction of the shielding cover 2, and the number of the positioning pin assemblies 8 is at least two groups oppositely arranged along the circumferential direction of the shielding barrel 1. The positioning pin assembly 8 comprises a third retaining element 82 and a plug pin shaft 81, the plug pin shaft 81 is movably arranged on the shielding barrel 1 along the radial direction of the shielding barrel 1 and can enter and exit the shielding cover 2, and the third retaining element 82 is connected with the shielding barrel 1 and is sleeved on the plug pin shaft 81. The third retaining element 82 moves the plug pin shaft 81 along the radial direction of the shielding barrel 1 between a fifth position and a sixth position. When the plug pin shaft 81 is located at the fifth position, the shielding cover 2 and the shielding barrel 1 are locked along the axial direction. When the plug pin shaft 81 is located at the sixth position, the shielding cover 2 and the shielding barrel 1 are unlocked along the axial direction.

[0080] The number of the positioning pin assemblies 8 can be multiple groups and are uniformly distributed along the circumferential direction of the outer side wall of the shielding barrel 1. The outer side wall of the shielding cover 2 is provided with a shielding cover 2 hole, or the outer side wall of the shielding cover 2 is provided with a shielding cover 2 slot extending along the circumferential direction. The end of the plug pin shaft 81 towards the axis of the shielding cover 2 can enter and exit the shielding cover 2 hole or the shielding cover 2 slot. The shielding cover 2 slot can enable the relative rotation between the shielding cover 2 and the shielding barrel 1, and the shielding cover 2 hole can enable the relative locking along the circumferential direction between the shielding cover 2 and the shielding barrel 1.

[0081] The outer side wall of the shielding barrel 1 is provided with a shielding barrel slot 14, and the third retaining element 82 can be arranged on the side wall of the shielding barrel slot 14. The plug pin shaft 81 is arranged in the third retaining element 82 and penetrates the shielding barrel 1 along the radial direction of the shielding barrel 1. The outer side wall of the plug pin shaft 81 is sealingly connected with the shielding barrel 1. The end of the plug pin shaft 81 penetrating the shielding barrel 1 can enter and exit the shielding cover 2 hole or the shielding cover 2 slot.

[0082] The outer side wall of the plug pin shaft 81 is sequentially provided with a fifth positioning ring groove 811b and a sixth positioning ring groove 811a in the direction close to the axis of the shielding cover 2. Figure 18The fifth positioning ring groove 811b is located above the sixth positioning ring groove 811a. The third retaining element 82 is a ring-shaped positioning pin mounting seat, and each spring pin 6 is uniformly distributed along the circumference of the positioning pin mounting seat. The spring pin 6 is arranged in the radial direction of the third retaining element 82 and can pass through the inner wall of the third retaining element 82 at the first end. The first end (inner end) of the spring pin 6 can enter and exit the fifth positioning ring groove 811b and the sixth positioning ring groove 811a. When the first end of each spring pin 6 is located in the fifth positioning ring groove 811b, the plug shaft 81 penetrates one end of the shielding barrel 1 into the shielding cover 2, so that the shielding cover 2 and the shielding barrel 1 are locked in the axial direction. When the first end of each spring pin 6 is located in the sixth positioning ring groove 811a, the plug shaft 81 penetrates one end of the shielding barrel 1 out of the shielding cover 2, and the shielding cover 2 and the shielding barrel 1 are unlocked in the axial direction.

[0083] In an exemplary embodiment, the third retaining element 82 is a ring-shaped positioning pin mounting seat, and the inner wall of the third retaining element 82 is provided with elastic protrusions, which are at least two oppositely arranged along the circumference of the inner wall, or a ring of elastic protrusions is continuously arranged along the circumference of the inner wall. The elastic protrusions can enter and exit the fifth positioning ring groove 811b and the sixth positioning ring groove 811a.

[0084] In an embodiment, as shown in Figure 2 The inner side wall of the shielding barrel 1 is uniformly provided with a plurality of guide blocks 12 along the circumference, and the inner bottom wall of the shielding barrel 1 is provided with a support table 13. The arrangement of the guide blocks 12 can facilitate the entry of the radioactive waste barrel into the storage space, and the support table 13 is used to support the radioactive waste barrel.

[0085] In the opening cover process of the present embodiment, the fastener 7 connecting the barrel cover 31 and the barrel body of the radioactive waste barrel is first removed by the dismounting mechanism 5. The specific dismounting steps have been described in detail in the foregoing embodiment, and will not be described here.

[0086] Then the gripper mechanism 4 is operated to make each telescopic claw 421 extend radially to grab the barrel cover 31 of the radioactive waste barrel located in the storage space.

[0087] The plug shaft 81 of the positioning pin assembly 8 is pulled out to unlock the shielding cover 2 and the shielding barrel 1 in the axial direction. At this time, the shielding cover 2 and the barrel cover 31 of the radioactive waste barrel can be lifted out together by lifting the lifting ring 21 of the shielding cover 2. In the above steps, the shielding cover 2 can be lifted out alone when each telescopic claw 421 is in the retracted state.

[0088] In the closing cover process of the present embodiment, each plug shaft 81 is pressed radially inward to lock the shielding cover 2 and the shielding barrel 1 in the axial direction, thereby completing the closing cover.

[0089] The above embodiments are only illustrative of the principles of the present application and its efficacy, and are not intended to limit the present application. Any modification or change made by any person skilled in the art without departing from the spirit and scope of the present application shall be covered by the claims of the present application.

Claims

1. A shielding device for transporting radioactive waste containers, characterized in that, include: A shielding container, wherein the shielding container is provided with a storage space for storing radioactive waste containers; A shielding cover is detachably mounted on the shielding barrel and is sealed to the shielding barrel. A gripping mechanism is used to grip the lid of a radioactive waste container located in the storage space. The gripping mechanism includes a gripping component and an operating component. The gripping component is located inside the storage space, and the operating component passes through the shielding cover. The upper part of the operating component is located outside the storage space, and the lower part of the operating component is located inside the storage space and is drively connected to the gripping component. The operating component is sealed to the shielding cover. A disassembly mechanism is used to remove the fasteners connecting the lid and body of the radioactive waste container. The disassembly mechanism is mounted on the shielding cover and is sealed to the shielding cover. The upper part of the disassembly mechanism is located outside the storage space, and the lower part of the disassembly mechanism is located inside the storage space.

2. The shielding device for transporting radioactive waste containers according to claim 1, characterized in that, The gripping component includes multiple telescopic claws. The horizontal rotation of the operating component can drive each telescopic claw to extend and retract synchronously in the radial direction in order to grip and release the lid of the radioactive waste bin located in the storage space.

3. The shielding device for transporting radioactive waste containers according to claim 2, characterized in that, The gripping assembly further includes a transmission unit and a support unit. The operating assembly and the gripping assembly are connected by the transmission unit. The transmission unit includes a rotating seat and multiple connecting plates. The support unit includes a support plate and multiple support seats. Each support seat is disposed on the side of the shielding cover facing the shielding barrel. The support plate has support feet that can extend into each support seat. The rotating seat is horizontally rotatably disposed on the support plate. Each telescopic claw is movably disposed on each support foot along the extension direction of the support foot. The first end of each connecting plate is hinged to the rotating seat. The hinge points are evenly distributed along the circumference of the rotating seat. The second end of each connecting plate is correspondingly hinged to each telescopic claw.

4. The shielding device for transporting radioactive waste containers according to claim 1, characterized in that, The shielding cover is rotatably mounted on the shielding barrel along its own axis. The disassembly mechanism includes a positioning component and a disassembly component. Both the positioning component and the disassembly component are mounted on the shielding cover. The lower parts of the positioning component and the lower parts of the disassembly component are located within the storage space. When the positioning component abuts against one of the two adjacent fasteners, the disassembly component aligns with the other fastener.

5. The shielding device for transporting radioactive waste containers according to claim 4, characterized in that, The positioning assembly includes a positioning rod, a first retaining element, and a first bushing. The first bushing passes through the shielding cover, and the first retaining element is connected to the first bushing and sleeved on the outer wall of the positioning rod. The positioning rod is axially movably disposed within the first bushing and the first retaining element. The first retaining element allows the positioning rod to move axially between a first position and a second position. When the positioning rod is in the first position, the outer wall of the positioning rod can abut against the fastener due to the rotation of the shielding cover along its own axis. When the positioning rod is in the second position, the positioning rod moves away from the fastener.

6. The shielding device for transporting radioactive waste containers according to claim 4, characterized in that, The shielding barrel has an annular scale on the open end face of its storage space, and the scale is coaxial with the shielding barrel.

7. The shielding device for transporting radioactive waste containers according to claim 4, characterized in that, Roller assemblies are evenly distributed circumferentially on the outer side wall of the shielding cover, and the shielding cover is rotatably mounted on the shielding barrel along its own axis via the roller assemblies.

8. The shielding device for transporting radioactive waste containers according to claim 4, characterized in that, The removal assembly includes a second retaining element, a second bushing, a sliding shaft, and a removal component. The removal component is kinetically connected to the sliding shaft. The second bushing is disposed within the shielding cover. The second retaining element is connected to the second bushing and sleeved on the outer wall of the sliding shaft. The sliding shaft is rotatable along its own axis and axially movable within the second retaining element and the second bushing. The second axial positioning component moves the sliding shaft between a third position and a fourth position. When the sliding shaft is in the third position, it can drive the removal component to remove the fastener. When the sliding shaft is in the fourth position, it drives the removal component away from the fastener.

9. The shielding device for transporting radioactive waste containers according to claim 1, characterized in that, The shielding device for transporting radioactive waste containers further includes a positioning pin assembly for limiting the shielding cover along its axial direction. The number of positioning pin assemblies is at least two sets arranged opposite each other circumferentially along the shielding container. Each positioning pin assembly includes a third retaining element and a pin shaft. The pin shaft is movably disposed on the shielding container radially and can enter and exit the shielding cover. The third retaining element is connected to the shielding container and fitted onto the pin shaft. The third retaining element allows the pin shaft to move radially between a fifth position and a sixth position. When the pin shaft is in the fifth position, the shielding cover and the shielding container are axially locked; when the pin shaft is in the sixth position, the shielding cover and the shielding container are axially unlocked.

10. The shielding device for transporting radioactive waste containers according to claim 1, characterized in that, The inner wall of the shielding barrel is provided with a plurality of guide blocks evenly distributed along the circumference, and the inner bottom wall of the shielding barrel is provided with a support platform.

Images