Shielding device for transferring radioactive waste barrel

Abstract

The invention relates to the technical field of radioactive waste barrel transfer devices, in particular to a shielding device for transferring a radioactive waste barrel, comprising: a shielding barrel, in which a storage space for storing the radioactive waste barrel is arranged; the shielding cover is detachably arranged on the shielding barrel and is in sealed connection with the shielding barrel; the gripping apparatus mechanism is used for gripping the barrel cover of the radioactive waste barrel located in the storage space; and the dismounting mechanism is used for dismounting a fastener connected between the barrel cover and the barrel body of the radioactive waste barrel. According to the scheme, under the conditions that remote control fails and no power supply is connected, fasteners and covers of the radioactive waste barrels can be manually disassembled on site, and the device has high flexibility and safety, is convenient to operate and is not limited by position conditions and equipment conditions.

Description

Technical Field

[0001] The invention relates to the technical field of radioactive waste barrel transfer devices, and in particular to a shielding device for transferring radioactive waste barrels. Background Art

[0002] During the operation of nuclear power plants, some radioactive wastes are generated. These radioactive wastes need to be put into standard steel drums for cement solidification or transported to storage areas. At present, nuclear power plants use remote automatic opening and sealing devices to open and seal barrels containing radioactive waste, and simple shielding containers are used to transport radioactive steel drums. However, when the automatic opening and sealing device is unavailable due to power outages or other circumstances, it is impossible to open and seal the barrels of radioactive waste on site, which directly affects the efficiency of waste treatment in nuclear power plants. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a shielding device for transporting radioactive waste barrels, which is used to solve the problem in the prior art that the steel barrel cannot be opened when the automatic opening cover device is not available.

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

[0005] A shielding barrel, wherein a storage space for storing radioactive waste barrels is provided in the shielding barrel;

[0006] A shielding cover is detachably disposed on the shielding barrel and is sealed and connected to the shielding barrel;

[0007] a gripper mechanism, used for gripping the barrel cover of the radioactive waste barrel located in the storage space, the gripper mechanism comprising a gripper assembly and an operating assembly, the gripper assembly being located in the storage space, the operating assembly being arranged on the shielding cover, the upper portion of the operating assembly being located outside the storage space, the lower portion of the operating assembly being located in the storage space and being transmission-connected to the gripper assembly, and the operating assembly being sealedly connected to the shielding cover;

[0008] A disassembly mechanism is used to remove the fasteners connecting the barrel cover and the barrel body of the radioactive waste barrel. The disassembly mechanism is penetrated on the shielding cover and is sealed with 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.

[0009] Optionally, the grasping assembly includes a plurality of telescopic claws, and the horizontal rotation of the operating assembly can drive each of the telescopic claws to synchronously extend and retract radially to grasp and release the barrel cover of the radioactive waste barrel located in the storage space.

[0010] Optionally, the grabbing assembly further includes a transmission unit and a support unit, the operating assembly and the grabbing assembly are connected via the transmission unit, the transmission unit includes a rotating seat and a plurality of connecting plates, the support unit includes a support plate and a plurality of support seats, each of the support seats is arranged on the side of the shielding cover facing the shielding barrel, the support plate has a supporting foot that can extend into each of the support seats, the rotating seat can be horizontally rotatably arranged on the support plate, each of the telescopic claws is movably arranged on each of the supporting feet along the extension direction of the supporting feet, the first end of each of the connecting plates is respectively hinged on the rotating seat, the hinge points of the hinge are evenly distributed along the circumference of the rotating seat, and the second end of each of the connecting plates is respectively hinged on each of the telescopic claws.

[0011] Optionally, the shielding cover is rotatably disposed on the shielding barrel along its own axis, and the disassembly mechanism includes a positioning component and a removal component, both of which are penetrated through the shielding cover, and the lower part of the positioning component and the lower part of the removal component are both located in the storage space, and when the positioning component abuts against one of two adjacent fasteners, the removal component is aligned with the other fastener.

[0012] Optionally, the positioning assembly includes a positioning rod, a first retaining element and a first sleeve, the first sleeve being inserted into the shielding cover, the first retaining element being connected to the first sleeve and being sleeved on an outer wall of the positioning rod, the positioning rod being axially movably arranged in the first sleeve and the first retaining element, the first retaining element enabling the positioning rod to move axially between a first position and a second position, when the positioning rod is located at the first position, the outer wall of the positioning rod can be against a fastener when the shielding cover rotates along its own axis; when the positioning rod is located at the second position, the positioning rod is away from the fastener.

[0013] Optionally, an annular scale plate is provided on the open end surface of the storage space of the shielding barrel, and the scale plate is coaxially arranged with the shielding barrel.

[0014] Optionally, roller assemblies are evenly distributed on the outer side wall of the shielding cover in the circumferential direction, and the shielding cover is rotatably disposed on the shielding barrel along its own axis through the roller assemblies.

[0015] Optionally, the dismantling assembly includes a second retaining element, a second sleeve, a sliding shaft and a dismantling piece, the dismantling piece is drivingly connected to the sliding shaft, the second sleeve is arranged in the shielding cover, the second retaining element is connected to the second sleeve and is sleeved on the outer wall of the sliding shaft, the sliding shaft can rotate along its own axis and is axially movably arranged in the second retaining element and the second sleeve, the second axial positioning piece enables the sliding shaft to move between a third position and a fourth position, when the sliding shaft is in the third position, the sliding shaft can drive the dismantling piece to remove the fastener; when the sliding shaft is in the fourth position, the sliding shaft drives the dismantling piece away from the fastener.

[0016] Optionally, the shielding device for transporting radioactive waste barrels also includes a positioning pin assembly for limiting the shielding cover along the axial direction of the shielding cover, the number of the positioning pin assemblies is at least two groups arranged relatively along the circumferential direction of the shielding barrel, the positioning pin assembly includes a third retaining element and a latch shaft, the latch shaft is movably arranged on the shielding barrel along 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 latch shaft, the third retaining element enables the latch shaft to move between a fifth position and a sixth position along the radial direction of the shielding barrel, when the latch shaft is located at the fifth position, the shielding cover and the shielding barrel are axially locked; when the latch shaft is located at the sixth position, the shielding cover and the shielding barrel are axially unlocked.

[0017] Optionally, a plurality of guide blocks are evenly distributed on the inner side wall of the shielding barrel along the circumferential direction, and a support platform is provided on the inner bottom wall of the shielding barrel.

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

[0019] The gripping mechanism and disassembly mechanism of this solution are respectively sealed and connected to the shielding cover, which can ensure safety during operation. By operating the disassembly mechanism outside the shielding barrel, the fasteners connecting the lid and the barrel body of the radioactive waste barrel can be manually removed when the shielding cover has not been opened. By operating the operating assembly outside the shielding barrel, the gripping assembly can be driven to grab and release the lid of the radioactive waste barrel in the storage space. Then, the shielding cover is grabbed by the device. During the rising process of the shielding cover, the lid of the radioactive waste barrel rises synchronously with the shielding cover, thereby realizing the opening of the radioactive waste barrel.

[0020] This solution can manually dismantle fasteners and remove covers from radioactive waste barrels on-site when remote control fails and there is no power access. It has high flexibility and safety, is easy to operate, and is not limited by location conditions and equipment conditions. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 This is a schematic diagram of the shielding barrel structure of an embodiment of the present invention;

[0023] Figure 3 It is a perspective view of a shielding cover according to an embodiment of the present invention;

[0024] Figure 4 A three-dimensional view of the shielding cover according to an embodiment of the present invention from another angle;

[0025] Figure 5 A top view of a shielding cover according to an embodiment of the present invention;

[0026] Figure 6 is a cross-sectional view of a shielding cover according to an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of the structure of a grabbing component according to an embodiment of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of a positioning component according to an embodiment of the present invention;

[0029] Fig. 9 It is a schematic diagram of the installation of the dismantling assembly according to an embodiment of the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the dismantling assembly according to an embodiment of the present invention;

[0031] Fig.11 for Fig.10 Sectional view at the middle BB;

[0032] Fig.12 This is a schematic diagram of the idle state of the disassembly mechanism according to an embodiment of the present invention;

[0033] Fig.13 This is a schematic diagram of a state where the positioning assembly according to an embodiment of the present invention is pressed downward;

[0034] Fig.14 This is a schematic diagram of a state where the positioning assembly according to an embodiment of the present invention is pressed downward and abuts against a fastener;

[0035] Fig.15 This is a schematic diagram of the state of the dismantling assembly of the embodiment of the present invention when dismantling the fastener;

[0036] Fig.16 It is a schematic diagram of the structure of a dial plate according to an embodiment of the present invention;

[0037] Fig.17A schematic structural diagram of a positioning pin assembly according to an embodiment of the present invention;

[0038] Fig.18 for Fig.17 Section view at AA in the figure.

[0039] Part Number Description

[0040] 1-shielding barrel; 11-dial; 12-guide block; 13-support platform; 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-gripping mechanism; 41-operating assembly; 411-first socket wrench; 412-rotating shaft; 42-grabbing assembly; 421-telescopic claw; 422-rotating seat; 423-support plate; 424-support seat; 425-connecting plate; 5-disassembly mechanism; 51-disassembly assembly; 511-sliding shaft; 511a-fourth positioning ring groove ;511b-third positioning ring groove;512-disassembly part;513-second bushing;514-second retaining element;515-second socket wrench;516-coupling;52-positioning assembly;521-positioning rod;521a-first positioning ring groove;521b-second positioning ring groove;522-first retaining element;523-first bushing;524-locking nut;525-linear bearing;6-spring pin;7-fastener;8-positioning pin assembly;81-pin shaft;811a-sixth positioning ring groove;811b-fifth positioning ring groove;82-third retaining element. DETAILED DESCRIPTION

[0041] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0042] It should be noted that the diagram provided in the present embodiment only illustrates the basic concept of the present invention in a schematic manner, so the diagram only shows the components related to the present invention rather than drawing according to the number, shape and size of the components during actual implementation. The type, quantity and ratio of each component during actual implementation can be a random change, and the component layout type may also be more complicated. The structure, ratio, size, etc. illustrated in the drawings of the present specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can implement, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of narration, and are not used to limit the scope of the present invention. The change or adjustment of its relative relationship should also be regarded as the scope of the present invention without substantially changing the technical content.

[0043] See also Figures 1 to 18 , this embodiment provides a shielding device for transporting radioactive waste barrels, including a shielding barrel 1, wherein a storage space for storing radioactive waste barrels is provided in the shielding barrel 1, and the storage space is also the inner cavity of the shielding barrel 1;

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

[0045] The gripper mechanism 4 is used to grab or release the barrel cover 31 of the radioactive waste barrel located in the storage space. The gripper mechanism 4 includes a gripping component 42 and an operating component 41. The gripping component 42 is located in the storage space. The operating component 41 is penetrated on the shielding cover 2. The upper part of the operating component 41 is located outside the storage space. The lower part of the operating component 41 is located in the storage space and is transmission-connected to the gripping component 42. The operating component 41 is sealed to the shielding cover 2.

[0046] The disassembly mechanism 5 is used to remove the fastener 7 connecting the barrel cover 31 and the barrel body of the radioactive waste barrel. The disassembly mechanism 5 is penetrated on the shielding cover 2 and is sealedly connected to the shielding cover 2. The upper part of the disassembly mechanism 5 is located outside the storage space, and the lower part of the disassembly mechanism 5 is located inside the storage space.

[0047] The shield barrel 1 is cylindrical and has an inner cavity. The top of the shield barrel 1 is open, that is, the top opening of the inner cavity of the shield barrel 1 can be connected to the outside. The shield cover 2 is detachably arranged on the top opening of the shield barrel 1, and can close the top opening of the inner cavity of the shield barrel 1. The outer wall of the shield cover 2 is sealed to the inner wall of the shield barrel 1. The shield cover 2 and the shield barrel 1 can be connected by a detachable connection method such as a threaded connection and a pin connection.

[0048] In one embodiment, if Figure 1 and Figure 2 As shown, the top of the inner wall of the shield barrel 1 is provided with a shield cover positioning step for positioning and fixing the shield cover 2 in the vertical direction, and the bottom of the shield cover 2 abuts against the bottom wall of the shield cover positioning step to prevent the shield cover 2 from continuing to move deeper into the inner cavity of the shield barrel 1. The axial direction of the shield barrel 1, i.e. Figure 1 and Figure 2 The vertical direction in .

[0049] The tops of the shielding cover 2 and the radioactive waste barrel cover 31 are both provided with lifting rings 21, and the shielding cover 2 can be grasped and lifted by the lifting rings 21 of the shielding cover 2, and the radioactive waste barrel cover 31 can be grasped and lifted by the lifting rings 21 of the radioactive waste barrel cover 31, so as to realize the opening of the shielding device and the radioactive waste barrel cover 31.

[0050] The gripper mechanism 4 includes a gripping assembly 42 and an operating assembly 41. The upper part of the operating assembly 41 is located above the shielding cover 2, that is, 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 gripping assembly 42 is located below the shielding cover 2, that is, when the shielding cover 2 is installed on the shielding barrel 1, the gripping assembly 42 is located inside the storage space. The operating assembly 41 passes through the shielding cover 2 along the axial direction of the shielding cover 2 and is transmission-connected with the gripping assembly 42. The operating assembly 41 can be understood as a power input end, and the gripping assembly 42 is a power output end. By operating the operating assembly 41 outside the shielding barrel 1, the gripping 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, or it can be operated by an auxiliary tool such as a manual handheld electric drill, so that the scope of use of this embodiment is more extensive. Exemplarily, the operating assembly 41 is arranged in the middle of the shielding cover 2.

[0051] The barrel cover 31 and barrel body of the radioactive waste barrel are usually connected by fasteners 7 such as bolts. The disassembly mechanism 5 can manually disassemble the fasteners 7 connecting the barrel cover 31 and barrel body of the radioactive waste barrel when the shielding cover 2 is not opened.

[0052] The upper portion of the disassembly mechanism 5 is located outside the storage space, and the lower portion is located inside the storage space. The disassembly mechanism 5 is vertically penetrated on the shielding cover 2 and is sealedly connected to the shielding cover 2 .

[0053] In this embodiment, the gripping mechanism 4 and the disassembly mechanism 5 are respectively sealed and connected to the shielding cover 2, which can ensure safety during operation. When the shielding cover 2 has not been opened, the fastener 7 connecting the barrel cover 31 and the barrel body of the radioactive waste barrel can be manually removed by operating the disassembly mechanism 5 outside the shielding barrel 1. By operating the operating component 41 outside the shielding barrel 1, the gripping component 42 can be driven to grip and release the barrel cover 31 of the radioactive waste barrel in the storage space. Then, the shielding cover 2 is gripped by the device. During the rising process of the shielding cover 2, the barrel cover 31 of the radioactive waste barrel rises synchronously with the shielding cover 2, thereby realizing the opening of the radioactive waste barrel.

[0054] This embodiment can manually dismantle the fasteners 7 and remove the cover of the radioactive waste barrel on site when remote control fails and there is no power supply. It has high flexibility and safety, is easy to operate, and is not limited by location conditions and equipment conditions.

[0055] In one embodiment, if Figure 6 and Figure 7 As shown, the grab assembly 42 includes a plurality of telescopic claws 421. The horizontal rotation of the operating assembly 41 can drive each telescopic claw 421 to synchronously telescope in the radial direction to grab and release the barrel cover 31 of the radioactive waste barrel located in the storage space. The telescopic claw 421 can be a horizontally arranged telescopic plate. When each telescopic claw 421 is synchronously extended in the radial direction, it can be extended under the lifting ring 21 on the barrel cover 31 of the radioactive waste barrel. When the grab assembly 42 rises, 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 that the barrel cover 31 of the radioactive waste barrel can be pulled up. When each telescopic claw 421 is synchronously retracted in the radial direction, each telescopic claw 421 withdraws from under the lifting ring 21 on the barrel cover 31 of the radioactive waste barrel to release the barrel cover 31 of the radioactive waste barrel. The above structure is simple and has low cost. Multiple telescopic claws 421 are synchronously extended and retracted, which can be relatively stable during grabbing and is not prone to interference and failure problems.

[0056] In one embodiment, if Figure 6 and Figure 7As shown, the grabbing assembly 42 also includes a transmission unit and a support unit. The operating assembly 41 and the grabbing assembly 42 are connected through the transmission unit. The transmission unit includes a rotating seat 422 and a plurality of connecting plates 425. The support unit includes a support 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 support plate 423 has a supporting foot that can extend into each supporting seat 424. The rotating seat 422 can be horizontally rotatably arranged on the support plate 423. Each telescopic claw 421 is movably correspondingly arranged on each supporting foot along the extension direction of the supporting foot. The first end of each connecting plate 425 is respectively hinged on the rotating seat 422, and the hinge points are evenly distributed along the circumference of the top surface of the rotating seat 422. The second end of each connecting plate 425 is respectively hinged on each telescopic claw 421.

[0057] The operating assembly 41 includes a vertically arranged rotating shaft 412 and a first socket wrench 411. The bottom of the first socket wrench 411 is sleeved on the top of the rotating shaft 412. The bottom shape of the first socket wrench 411 is the same as the top shape of the rotating shaft 412, so that the first socket wrench 411 can drive the rotating shaft 412 to rotate along its own axis. The rotating shaft 412 and the first socket wrench 411 are inserted into the shielding cover 2 through a sleeve. The rotating shaft 412 is concentrically arranged with the shielding cover 2, so as to facilitate the alignment of the gripper mechanism 4 with the barrel cover 31 of the radioactive waste barrel. A vertical column is arranged on the rotating seat 422. The top of the column is provided with a transmission hole that matches the bottom of the rotating shaft 412. The bottom shape of the rotating shaft 412 is the same as the shape 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 seat 422 can be driven to rotate synchronously when the rotating shaft 412 rotates along its own axis. This also makes it easy to disassemble the first socket wrench 411, the rotating shaft 412 and the rotating seat 422 in sequence. The shape of the transmission hole can be elliptical, triangular, quadrilateral, etc., but not circular.

[0058] The rotating seat 422 is rotatably arranged on the support plate 423 along the axis of the column. The shape of the rotating seat 422 can be cylindrical, triangular, rectangular, cube, etc. The first end of each connecting plate 425 is respectively hinged on the top surface of the rotating seat 422, and the hinge points are evenly distributed along the circumference of the top surface of the rotating seat 422. The second end of each connecting plate 425 is respectively hinged on the radial inner end of the telescopic claw 421 along the shielding cover 2. The support plate 423 has a long strip shape and a plurality of supporting feet extending radially along the shielding cover 2. The number of the supporting feet is the same as the number of the telescopic claws 421, the number of the connecting plates 425, and the number of the supporting seats 424. The supporting seats 424 are arranged on the bottom surface of the shielding cover 2, and each supporting seat 424 is evenly distributed along the circumference of the bottom surface of the shielding cover 2. Each supporting foot extends into each supporting seat 424, and the telescopic claw 421 is movably arranged on the supporting foot along the extension direction of the supporting foot (also the radial direction of the shielding cover 2), and one supporting foot is correspondingly provided with one telescopic claw 421. Thus, when the first socket wrench 411 drives the rotating shaft 412 to rotate, the rotating shaft 412 drives the rotating seat 422 to rotate, and when the rotating seat 422 rotates, each telescopic claw 421 is correspondingly pulled 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 efficiency of opening the cover.

[0059] In one embodiment, if Figure 8 and Fig. 9 As shown, the shielding cover 2 is rotatably arranged on the shielding barrel 1 along its own axis, and the disassembly mechanism 5 includes a positioning component 52 and a removal component 51, both of which are arranged on the shielding cover 2, and the lower part of the positioning component 52 and the lower part of the removal component 51 are both located in the storage space, and when the positioning component 52 abuts against one of the two adjacent fasteners 7, the removal component 51 is vertically opposite to the other fastener 7. Opposite and align have the same meaning, which means that the removal component 51 only needs to move downward to remove the fastener 7 without moving in other directions.

[0060] Generally speaking, the fasteners 7 connecting the barrel cover 31 and the barrel body of the radioactive waste barrel are evenly distributed along the circumference of the barrel cover 31 of the radioactive waste barrel, and are all arranged on the same circumference. 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 circumference, and the positioning assembly 52 and the removal assembly 51 and the fasteners 7 are also on the same circumference. When the shielding cover 2 rotates along its own axis, the positioning assembly 52 can contact one of the fasteners 7, and at this time, the position of the removal assembly 51 is opposite to a fastener 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 locate the fastener 7 and improve the removal efficiency of the fastener 7, thereby improving the overall opening efficiency.

[0061] In one embodiment, if Figure 8 As shown, the positioning assembly 52 includes a positioning rod 521, a first retaining element 522 and a first sleeve 523. The first sleeve 523 is inserted into the shielding cover 2. The first retaining element 522 is connected to the first sleeve 523 and is sleeved on the outer wall of the positioning rod 521. The positioning rod 521 is axially movably arranged in the first sleeve 523 and the first retaining element 522. The first retaining element 522 enables the positioning rod 521 to move axially between a first position and a second position. When the positioning rod 521 is located at the first position, the outer wall of the positioning rod 521 can be abutted against the fastener 7 under the rotation of the shielding cover 2 along its own axis; when the positioning rod 521 is located at 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 sleeve 523 is sealedly inserted into the shielding cover 2 in the vertical direction, and a flange is provided on the top of the first sleeve 523, 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, so as to limit the first sleeve 523 in the circumferential and radial directions of the shielding cover 2 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 sleeve 523, and the positioning rod 521 passes through the first retaining element 522 and the first sleeve 523 from top to bottom in sequence, that is, the first retaining element 522 and the first 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 its own axis in the first retaining element 522 and the first sleeve 523, and can also move along the axial direction of the shielding cover 2. The first holding element 522 enables the positioning rod 521 to move between a first position and a second position along the axial direction of the positioning rod 521. When the positioning rod 521 is located at the first position, the bottom end height of the positioning rod 521 is less than the top end height of the fastener 7, so that the outer wall of the positioning rod 521 can abut against the outer wall of the fastener 7 when the shielding cover 2 is rotated. When the positioning rod 521 is located at the second position, the bottom end height of the positioning rod 521 is greater than the top end height 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 an exemplary embodiment, Figure 8 As shown, 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 an annular positioning pin mounting seat, and each spring column pin 6 (spring plunger) is evenly distributed along the circumference of the positioning pin mounting seat. The spring column pin 6 is arranged along 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 column pin 6 can enter and exit the first positioning ring groove 521a, and the first end of the spring column pin 6 can also enter and exit the second positioning ring groove 521b.

[0064] like Figures 12 to 16 As shown, when the positioning rod 521 is in the lifting state, the positioning rod 521 is pressed downward, the positioning rod 521 moves downward, and the first end of the spring pin 6 enters the first positioning ring groove 521a. At this time, the positioning rod 521 is in the first position, and the height of the bottom end of the positioning rod 521 is lower than the height of the top end of the fastener 7. The bottom end of the positioning rod 521 can abut against the top end of the fastener 7. The shielding cover 2 is rotated to make the bottom end of the positioning rod 521 abut against one of the two adjacent fasteners 7 (the first fastener 7). At this time, the removal component 51 is opposite to the other of the two adjacent fasteners 7 (the second fastener 7), and the removal component 51 can remove the opposite fastener 7.

[0065] After one fastener 7 is positioned, the positioning rod 521 is lifted upward, and the first end of the spring pin 6 withdraws 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, and the height of the bottom end of the positioning rod 521 is higher than the height of the top end of the fastener 7. The bottom end of the positioning rod 521 cannot contact the top end of the fastener 7. The shielding cover 2 is rotated, and 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 to make the positioning rod 521 abut 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 removal component 51 is opposite to the first fastener 7 and can be removed. The above removal steps are repeated to remove the fastener 7.

[0066] In one embodiment, if Figure 8 As shown, a locking nut 524 is provided on the outer wall of the bottom end of the positioning rod 521 to prevent the positioning rod 521 from being dislodged upward from the first sleeve 523. A linear bearing 525 is provided between the positioning rod 521 and the first sleeve 523 to make the movement of the positioning rod 521 along its axial direction smoother.

[0067] In an exemplary embodiment, Figure 8 As shown, the first retaining element 522 is an annular positioning pin mounting seat, and its inner wall is provided with elastic protrusions, and the elastic protrusions are arranged opposite to each other along the circumference of the inner wall, or can be arranged continuously along the circumference of the inner wall. The elastic protrusions can enter and exit the first positioning ring groove 521a, and can also enter and exit the second positioning ring groove 521b.

[0068] In one embodiment, if Figure 2 and Fig.16 As shown, an annular scale plate 11 is provided on the open end surface of the storage space of the shield barrel 1, and the scale plate 11 is coaxially arranged with the shield barrel 1. An arrow 23 is provided on the edge of the top surface of the shield cover 2, and the arrow 23 points to the scale on the scale plate 11, so as to facilitate the alignment of the scale on the scale plate 11. The circumferential distance between the arrow 23 and the disassembly member 512 of the disassembly assembly 51 is equal to the circumferential distance between two adjacent fasteners 7. That is to say, when the arrow 23 is aligned with one of the two adjacent fasteners 7 in the circumferential direction, the disassembly member 512 is directly opposite to the other of the two adjacent fasteners 7 in the vertical direction.

[0069] The dial 11 is annular and is arranged on the top surface of the shield barrel 1. The dial 11 can rotate along its own axis to serve as a marking. The number of scales on the dial 11 is the same as the number of fasteners 7 and is evenly divided along the circumference. That is, each scale on the dial 11 corresponds to the position of a fastener 7. When the fastener 7 is disassembled to the last one, it is inconvenient to locate it. Therefore, the dial 11 can be used for marking. For example, when there are only two last fasteners 7 left and one of them is to be removed, rotate the dial 11 so that one of the scales is aligned with the fastener 7 to be removed. Then the next scale adjacent to it on the dial 11 is aligned with the position of the last fastener 7. By setting the dial 11, the last fastener 7 can be quickly located and removed.

[0070] In one embodiment, if Figure 3 and Figure 4 As shown, roller assemblies 22 are evenly distributed on the outer wall of the shielding cover 2 along the circumferential direction, and the shielding cover 2 is rotatably arranged on the shielding barrel 1 along its own axis through the roller assemblies 22 .

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

[0072] In one embodiment, if Fig.10 and Fig.11 As shown, the dismantling component 51 includes a second retaining element 514, a second sleeve 513, a sliding shaft 511 and a dismantling piece 512, the dismantling piece 512 is transmission-connected to the sliding shaft 511, the second sleeve 513 is arranged in the shielding cover 2, the second retaining element 514 is connected to the second sleeve 513 and is sleeved on the outer wall of the sliding shaft 511, the sliding shaft 511 can rotate along its own axis and is axially movably arranged in the second retaining element 514 and the second sleeve 513, the second axial positioning piece enables the sliding shaft 511 to move between a third position and a fourth position, when the sliding shaft 511 is located at the third position, the sliding shaft 511 can drive the dismantling piece 512 to remove the fastener 7; when the sliding shaft 511 is located at the fourth position, the sliding shaft 511 drives the dismantling piece away from the fastener 7.

[0073] The disassembly member 512 is a sleeve, and the shape of the hole of the sleeve is the same as the head shape of the fastener 7, but both are not circular. The second sleeve 513 is vertically penetrated on the shielding cover 2, and the second sleeve 513 is sealed and connected with the shielding cover 2. A step hole is provided on the shielding cover 2, and a flange is provided on the top outer wall of the second sleeve 513. The bottom end surface of the flange of the second sleeve 513 abuts against the bottom wall of the step hole, and the outer wall of the flange of the second sleeve 513 abuts against the inner wall of the step hole, so that the second sleeve 513 is positioned along its axial and radial directions. The second retaining element 514 is concentrically arranged on the top of the second sleeve 513, and the sliding shaft 511 passes through the second retaining element 514 and the second sleeve 513 from top to bottom in sequence, and the sliding shaft 511 can be rotatably arranged in the second retaining element 514 and the second sleeve 513 along its own axis and movably arranged in the axial direction of the sliding shaft 511. The bottom end of the sliding shaft 511 is connected to the disassembly member 512 via a coupling 516, so that the disassembly member 512 can rotate along its own axis and move along the axial direction of the sliding shaft 511 with the sliding shaft 511, and the disassembly member 512 is located in the storage space. The top end of the sliding shaft 511 is connected to the second socket wrench 515 to facilitate the rotation of the sliding shaft 511.

[0074] In an exemplary embodiment, Fig.11 As shown, the sliding shaft 511 is provided with a third positioning ring groove 511b and a fourth positioning ring groove 511a, and the third positioning ring groove 511b is located above the fourth positioning ring groove 511a. The second retaining element 514 is an annular positioning pin mounting seat, and each spring column pin 6 (spring plunger) is evenly distributed along the circumference of the positioning pin mounting seat. The spring column pin 6 is arranged along the radial direction of the second retaining element 514 and the first end can pass through the inner wall of the second retaining element 514. The first end of the spring column pin 6 can enter and exit the third positioning ring groove 511b, and the first end of the spring column pin 6 can also enter and exit the fourth positioning ring groove 511a.

[0075] When the sliding shaft 511 is in the lifting state, the sliding shaft 511 is pressed downward, and the sliding shaft 511 moves downward. The first end of the spring pin 6 enters the third positioning ring groove 511b. At this time, the sliding shaft 511 is located in the third position, and 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 upward, and the first end of the spring pin 6 withdraws from the third positioning ring groove 511b and enters the fourth positioning ring groove 511a. At this time, the sliding shaft 511 is located in the fourth position, and the sliding shaft 511 drives the disassembly part 512 to move upward away from the position of the fastener 7.

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

[0078] In an exemplary embodiment, Fig.11 As shown, the second retaining element 514 is an annular positioning pin mounting seat, and its inner wall is provided with elastic protrusions, and the elastic protrusions are arranged opposite to each other along the circumference of the inner wall, or can be arranged continuously in a circle along the circumference of the inner wall. The elastic protrusions can enter and exit the third positioning ring groove 511b, and can also enter and exit the fourth positioning ring groove 511a.

[0079] In one embodiment, if Fig.17 and Fig.18 As shown, the shielding device for transporting radioactive waste barrels also includes a positioning pin assembly 8 for limiting the shielding cover 2 along the axial direction of the shielding cover 2. The number of the positioning pin assemblies 8 is at least two groups arranged relatively along the circumferential direction of the shielding barrel 1. The positioning pin assembly 8 includes a third retaining element 82 and a latch shaft 81. The latch 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. The third retaining element 82 is connected to the shielding barrel 1 and is sleeved on the latch shaft 81. The third retaining element 82 enables the latch shaft 81 to move between a fifth position and a sixth position along the radial direction of the shielding barrel 1. When the latch shaft 81 is located at the fifth position, the shielding cover 2 and the shielding barrel 1 are locked axially; when the latch shaft 81 is located at the sixth position, the shielding cover 2 and the shielding barrel 1 are unlocked axially.

[0080] The number of positioning pin assemblies 8 can be multiple groups, and they are evenly distributed along the circumferential direction of the outer wall of the shield barrel 1. The outer wall of the shielding cover 2 is provided with a shielding cover 2 hole, or the outer wall of the shielding cover 2 is provided with a shielding cover 2 groove extending along the circumferential direction. The end of the latch shaft 81 facing the axis of the shielding cover 2 can enter and exit the shielding cover 2 hole or the shielding cover 2 groove. The setting of the shielding cover 2 groove enables the shielding cover 2 and the shielding barrel 1 to rotate relative to each other, and the setting of the shielding cover 2 hole can lock the shielding cover 2 and the shielding barrel 1 relative to each other along the circumferential direction.

[0081] A shielding barrel groove 14 is provided on the outer side wall of the shielding barrel 1, and a third retaining element 82 can be provided on the side wall of the shielding barrel groove 14. The latch shaft 81 is inserted into the third retaining element 82 and penetrates the shielding barrel 1 in the radial direction of the shielding barrel 1, and the outer side wall of the latch shaft 81 is sealedly connected to the shielding barrel 1. One end of the latch shaft 81 that penetrates the shielding barrel 1 can enter and exit the hole of the shielding cover 2 or the groove of the shielding cover 2.

[0082] The outer wall of the latch shaft 81 is provided with a fifth positioning ring groove 811b and a sixth positioning ring groove 811a in sequence along the direction close to the axis of the shielding cover 2. Fig.18The fifth positioning ring groove 811b is located above the sixth positioning ring groove 811a). The third retaining element 82 is an annular positioning pin mounting seat, and each spring column pin 6 (spring plunger) is evenly distributed along the circumference of the positioning pin mounting seat. The spring column pin 6 is arranged along the radial direction of the third retaining element 82 and the first end can pass through the inner wall of the third retaining element 82. The first end (inner end) of the spring column pin 6 can enter and exit the fifth positioning ring groove 811b, and the first end of the spring column pin 6 can also enter and exit the sixth positioning ring groove 811a. When the first end of each spring column pin 6 is located in the fifth positioning ring groove 811b, the latch shaft 81 passes through one end of the shielding barrel 1 and extends 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 column pin 6 is located in the sixth positioning ring groove 811a, the latch shaft 81 passes through one end of the shielding barrel 1 and extends 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 an annular positioning pin mounting seat, and its inner wall is provided with elastic protrusions, and the elastic protrusions are at least two and arranged oppositely along the circumference of the inner wall; or they can be arranged continuously along the circumference of the inner wall. The elastic protrusions can enter and exit the fifth positioning ring groove 811b, and can also enter and exit the sixth positioning ring groove 811a.

[0084] In one embodiment, if Figure 2 As shown, the inner side wall of the shield barrel 1 is evenly distributed with a plurality of guide blocks 12 along the circumferential direction, and the inner bottom wall of the shield barrel 1 is provided with a support platform 13. The setting of the guide blocks 12 can facilitate the radioactive waste barrel to enter the storage space, and the support platform 13 is used to support the radioactive waste barrel.

[0085] When opening the lid of the present embodiment, the fastener 7 connecting the lid 31 and the barrel body of the radioactive waste barrel is first removed by the disassembly mechanism 5. The specific removal steps have been described in detail in the above embodiments and will not be repeated here.

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

[0087] Pull out the latch shaft 81 of the positioning pin assembly 8 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, when each telescopic claw 421 is in a retracted state, the shielding cover 2 can be lifted out alone.

[0088] In this embodiment, when sealing, each latch shaft 81 is pressed radially inward to lock the shielding cover 2 and the shielding barrel 1 axially, thereby completing the sealing.

[0089] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A shielding device for transporting radioactive waste barrels, characterized in that: include: A shielding barrel, wherein a storage space for storing radioactive waste barrels is provided in the shielding barrel; A shielding cover is detachably disposed on the shielding barrel and is sealed and connected to the shielding barrel; a gripper mechanism, used for gripping the barrel cover of the radioactive waste barrel located in the storage space, the gripper mechanism comprising a gripper assembly and an operating assembly, the gripper assembly being located in the storage space, the operating assembly being arranged on the shielding cover, the upper portion of the operating assembly being located outside the storage space, the lower portion of the operating assembly being located in the storage space and being transmission-connected to the gripper assembly, and the operating assembly being sealedly connected to the shielding cover; A disassembly mechanism is used to remove the fasteners connecting the barrel cover and the barrel body of the radioactive waste barrel. The disassembly mechanism is penetrated through the shielding cover and is sealed with 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 barrels according to claim 1, characterized in that: The grabbing assembly includes a plurality of telescopic claws, and the horizontal rotation of the operating assembly can drive each of the telescopic claws to synchronously extend and retract radially to grab and release the barrel cover of the radioactive waste barrel located in the storage space.

3. The shielding device for transporting radioactive waste barrels according to claim 2, characterized in that: The grabbing assembly also includes a transmission unit and a support unit, the operating assembly and the grabbing assembly are connected through the transmission unit, the transmission unit includes a rotating seat and a plurality of connecting plates, the support unit includes a support plate and a plurality of supporting seats, each of the supporting seats is arranged on the side of the shielding cover facing the shielding barrel, the support plate has a supporting foot that can extend into each of the supporting seats, the rotating seat can be horizontally rotatably arranged on the support plate, each of the telescopic claws is movably correspondingly arranged on each of the supporting feet along the extension direction of the supporting feet, the first end of each of the connecting plates is respectively hinged on the rotating seat, the hinge points of the hinge are evenly distributed along the circumference of the rotating seat, and the second end of each of the connecting plates is respectively hinged on each of the telescopic claws.

4. The shielding device for transporting radioactive waste barrels according to claim 1, characterized in that: The shielding cover is rotatably arranged on the shielding barrel along its own axis, and the disassembly mechanism includes a positioning component and a removal component, both of which are penetrated through the shielding cover, and the lower part of the positioning component and the lower part of the removal component are both located in the storage space, and when the positioning component abuts against one of two adjacent fasteners, the removal component is aligned with the other fastener.

5. The shielding device for transporting radioactive waste barrels according to claim 4, characterized in that: The positioning assembly includes a positioning rod, a first retaining element and a first sleeve, the first sleeve being inserted into the shielding cover, the first retaining element being connected to the first sleeve and being sleeved on the outer wall of the positioning rod, the positioning rod being axially movably arranged in the first sleeve and the first retaining element, the first retaining element enabling the positioning rod to move axially between a first position and a second position, when the positioning rod is located at the first position, the outer wall of the positioning rod can abut against a fastener under the rotation of the shielding cover along its own axis; when the positioning rod is located at the second position, the positioning rod is away from the fastener.

6. The shielding device for transporting radioactive waste barrels according to claim 4, characterized in that: An annular scale plate is arranged on the open end surface of the storage space of the shield barrel, and the scale plate is arranged coaxially with the shield barrel.

7. The shielding device for transporting radioactive waste barrels according to claim 4, characterized in that: Roller assemblies are evenly distributed on the outer side wall of the shielding cover in the circumferential direction, and the shielding cover is rotatably arranged on the shielding barrel along its own axis through the roller assemblies.

8. The shielding device for transporting radioactive waste barrels according to claim 4, characterized in that: The dismantling assembly includes a second retaining element, a second sleeve, a sliding shaft and a dismantling piece, the dismantling piece is drivingly connected to the sliding shaft, the second sleeve is arranged in the shielding cover, the second retaining element is connected to the second sleeve and is sleeved on the outer wall of the sliding shaft, the sliding shaft can rotate along its own axis and is axially movably arranged in the second retaining element and the second sleeve, the second axial positioning piece enables the sliding shaft to move between a third position and a fourth position, when the sliding shaft is located at the third position, the sliding shaft can drive the dismantling piece to remove the fastener; when the sliding shaft is located at the fourth position, the sliding shaft drives the dismantling piece away from the fastener.

9. The shielding device for transporting radioactive waste barrels according to claim 1, characterized in that: The shielding device for transporting radioactive waste barrels also includes a positioning pin assembly for limiting the shielding cover along the axial direction of the shielding cover. The number of the positioning pin assemblies is at least two groups arranged relatively along the circumferential direction of the shielding barrel. The positioning pin assembly includes a third retaining element and a latch shaft. The latch shaft is movably arranged on the shielding barrel along 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 latch shaft. The third retaining element enables the latch shaft to move between a fifth position and a sixth position along the radial direction of the shielding barrel. When the latch shaft is located at the fifth position, the shielding cover and the shielding barrel are axially locked; when the latch shaft is located at the sixth position, the shielding cover and the shielding barrel are axially unlocked.

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

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