Translation type automatic covering system of near-surface radioactive waste residue disposal site

Abstract

The invention provides a translation type automatic covering system for a near-surface radioactive waste residue disposal site, and belongs to the technical field of radioactive waste underground placement. According to the translation type automatic covering system for the near-surface radioactive waste residue disposal site, a storage pit for placing radioactive waste residues is formed in the ground; a containing groove is formed in the position, close to the opening, of the inner side of the garage pit, an outer sealing cover is slidably arranged in the containing groove, the end, facing the interior of the garage pit, of the outer sealing cover is open and slidably connected with an inner sealing cover, an inserting groove for the end of the inner sealing cover to be inserted is formed in the position, right facing the containing groove, of the inner side of the garage pit, and the outer sealing cover and the inner sealing cover seal the opening of the garage pit. The inner side of the containing groove communicates with a containing cavity, and a driving mechanism used for driving the outer sealing cover or the inner sealing cover to move is arranged in the containing cavity. Translation of the inner sealing cover in the outer sealing cover and translation of the outer sealing cover between the containing groove and the containing cavity are achieved through the driving mechanism, and the opening and closing efficiency of the warehouse pit opening is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of underground placement of radioactive waste, and more specifically, relates to a translational automatic covering system for a near-surface radioactive waste disposal site. Background Art

[0002] Radioactive waste disposal refers to the placement of radioactive solid waste in specially built underground facilities, and is an indispensable link in the complete nuclear industry chain. Radioactive waste slag storage is a pit opened on the ground for storing radioactive waste slag. When radioactive waste slag is not being stored or taken out, each pit opening needs to be closed to reduce radiation.

[0003] At present, the openings of most radioactive waste repositories are generally covered directly on the pit with precast concrete panels. However, due to the heavy weight of the precast concrete panels, workers cannot carry them directly. Every time the pit is opened, a crane is required to move the precast concrete panels, resulting in low opening and closing efficiency of the pit opening. Summary of the invention

[0004] The purpose of the present invention is to provide a translational automatic covering system for a near-surface radioactive waste disposal site to solve the technical problem of low opening and closing efficiency of pit openings in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a translational automatic covering system for a near-surface radioactive waste disposal site, a pit for placing radioactive waste is opened on the ground, a receiving groove is opened at a position close to the opening on the inner side of the pit, an outer closing cover is slidably arranged in the receiving groove, the outer closing cover opens toward one end in the pit and is slidably connected with an inner closing cover, a slot for inserting the end of the inner closing cover is opened at a position on the inner side of the pit opposite to the receiving groove, and the outer closing cover and the inner closing cover close the pit opening; the inner side of the receiving groove is connected to a receiving cavity, and a driving mechanism for driving the outer closing cover or the inner closing cover to move is arranged in the receiving cavity. In combination with the above technical solution, in a possible implementation, the driving mechanism includes an outer rack, an inner rack, a driving assembly and an adjusting assembly; the outer rack slides horizontally between the accommodating groove and the accommodating cavity and is connected to the outer closing cover; the inner rack slides horizontally between the accommodating groove and the accommodating cavity and is connected to the inner closing cover; the driving assembly is used to drive the outer rack or the inner rack to move; and the adjusting assembly is used to drive the driving assembly to connect to the outer rack or the inner rack.

[0006] In combination with the above technical solution, in a possible implementation manner, a first return spring connected to the inner closing cover is arranged in the outer closing cover.

[0007] In combination with the above technical solution, in a possible implementation, the driving assembly includes a driving motor and a driving gear, the driving motor is arranged on the adjusting assembly, the driving gear is coaxially fixed on the output shaft of the driving motor, and the driving gear is used to engage with the outer rack and the inner rack respectively.

[0008] In combination with the above technical solution, in a possible implementation, the adjustment assembly includes a drive cylinder and a mounting plate, the drive cylinder is arranged in the accommodating cavity and is perpendicular to the external rack, the mounting plate is fixed on the drive cylinder piston rod, and the drive motor is arranged on the mounting plate.

[0009] In combination with the above technical solution, in a possible implementation, the driving mechanism also includes a one-way limit assembly and a release assembly, the one-way limit assembly is arranged between the inner rack and the inner top wall of the accommodating chamber, the one-way limit assembly is used to limit the inner rack in real time from moving toward the storage pit, and the release assembly is used to release the limitation of the inner rack by the one-way limit assembly.

[0010] In combination with the above technical solution, in a possible implementation method, the one-way limit assembly includes a ratchet, a pawl and a second return spring, the ratchet is arranged on the top wall of the accommodating chamber, the pawl is arranged on one side of the inner rack and meshes with the ratchet, when the ratchet is engaged with the pawl, the inner rack cannot move toward the direction of the storage pit; the ratchet is slidably arranged on the top wall of the accommodating chamber along the axial direction of the output shaft of the drive motor, the second return spring is arranged in the accommodating chamber and connected to the ratchet, and the release assembly is used to drive the ratchet to separate from the pawl.

[0011] In combination with the above technical scheme, in a possible implementation method, the release assembly includes a fixed plate, a pushing plate, a connecting spring and an extrusion block, the fixed plate is fixedly connected to the output shaft of the driving motor, a connecting groove is provided at the outer end of the fixed plate, the bottom end of the pushing plate is slidably connected to the connecting groove, the connecting spring is arranged in the connecting groove and connected to the pushing plate, a slope facing the ratchet is provided on one side of the outer end of the pushing plate, and the slope and non-slope of the outer end of the pushing plate are simultaneously facing the side of the ratchet; the extrusion block is fixed on the top wall of the accommodating cavity and is used to face the slope of the outer end of the pushing plate, and a socket for inserting the extrusion block is provided on one side of the ratchet; when the extrusion block extrudes the slope of the outer end of the pushing plate, the non-slope part of the outer end of the pushing plate moves toward the connecting groove and separates from the ratchet.

[0012] In combination with the above technical solution, in a possible implementation, a slide groove is provided in the top wall of the accommodating cavity, a slider located in the slide groove is fixed to the top surface of the ratchet, and the second return spring is arranged in the slide groove and connected to the slider.

[0013] In combination with the above technical solution, in a possible implementation, a laser transmitter facing away from the output shaft of the drive motor is arranged on the fixed plate, a first laser receiver is arranged on the top wall of the accommodating cavity, and a second laser receiver is arranged on the bottom wall of the accommodating cavity; when the driving gear is meshed with the inner rack, the first laser receiver is used to receive the laser emitted by the laser transmitter, and when the first laser receiver receives the laser, the outer end of the push plate faces upward and one side is opposite to the ratchet; when the driving gear is meshed with the outer rack, the second laser receiver is used to receive the laser emitted by the laser transmitter, and when the second laser receiver receives the laser, the outer end of the push plate faces downward.

[0014] The beneficial effect of the translational automatic covering system for a near-surface radioactive waste disposal site provided by the present invention is that: compared with the prior art, the present invention closes the storage pit by means of a retractable outer closing cover and an inner closing cover, and according to the use requirements, only the inner closing cover can be opened to any position, or both the outer closing cover and the inner closing cover can be opened completely, and the translation of the inner closing cover within the outer closing cover and the translation of the outer closing cover between the containing groove and the containing cavity can be realized by a driving mechanism, thereby improving the opening and closing efficiency of the storage pit opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A cross-sectional view of a translational automatic covering system for a near-surface radioactive waste disposal site provided by an embodiment of the present invention; Figure 2 A cross-sectional view of a driving mechanism provided by an embodiment of the present invention; Figure 3 A bottom view of the interior of the accommodation groove and the accommodation cavity provided in an embodiment of the present invention; Figure 4 A partial cross-sectional view of a one-way limit assembly, a plug hole and an extrusion block provided in an embodiment of the present invention; Figure 5 A partial cross-sectional view of a disassembled assembly according to an embodiment of the present invention.

[0017] Among them, the reference numerals in the figures are as follows: 1. Storage pit; 11. Receiving groove; 12. Slot; 13. Receiving chamber; 131. Slide; 132. Sliding block; 2. Outer closure cover; 21. First reset spring; 3. Inner closure cover; 4. Driving mechanism; 41. Outer rack; 42. Inner rack; 43. Driving assembly; 431. Driving motor; 432. Driving gear; 44. Adjusting assembly; 441. Driving cylinder; 442. Mounting plate; 45. One-way limit assembly; 451. Ratchet; 5411. Socket; 452. Ratchet; 453. Second reset spring; 46. Release assembly; 461. Fixing plate; 4611. Connecting groove; 462. Pushing plate; 463. Connecting spring; 464. Extrusion block; 5. Guide block; 51. Guide rail. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of this application.

[0019] It should be further explained that the drawings and implementation modes of the present invention mainly describe the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0020] When an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0021] The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. The directions or positional relationships indicated by the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0022] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, and the spatially relative descriptions used here are interpreted accordingly.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0024] The following is a description of a translational automatic covering system for a near-surface radioactive waste disposal site provided by the present invention.

[0025] like Figure 1 and Figure 2 As shown, one embodiment of the present invention provides a translational automatic covering system for a near-surface radioactive waste disposal site, wherein a pit 1 for placing radioactive waste is provided on the ground, a receiving groove 11 is provided at a position near the opening on the inner side of the pit 1, an outer closing cover 2 is slidably provided in the receiving groove 11, the outer closing cover 2 opens toward one end in the pit 1 and is slidably connected with an inner closing cover 3, a slot 12 for inserting the end of the inner closing cover 3 is provided at a position on the inner side of the pit 1 opposite to the receiving groove 11, and the outer closing cover 2 and the inner closing cover 3 close the opening of the pit 1; a receiving chamber 13 is connected to the inner side of the receiving groove 11, and a driving mechanism 4 for driving the outer closing cover 2 or the inner closing cover 3 to move is provided in the receiving chamber 13. When it is necessary to open the opening of the storage pit 1, the driving mechanism 4 drives the inner closing cover 3 to slide toward the outer closing cover 2. If it is necessary to open the opening of the storage pit 1 completely, the driving mechanism 4 continues to drive the inner closing cover 3 to slide, so that the inner closing cover 3 drives the outer closing cover 2 to completely enter between the accommodating groove 11 and the accommodating cavity 13; when it is necessary to close the opening of the storage pit 1, the driving mechanism 4 then drives the inner closing cover 3 and the outer closing cover 2 to translate and reset in turn.

[0026] The present embodiment provides a translational automatic covering system for a near-surface radioactive waste disposal site. Compared with the prior art, the pit 1 is closed by a retractable outer closing cover 2 and an inner closing cover 3. According to the use requirements, only the inner closing cover 3 can be opened to any position, or both the outer closing cover 2 and the inner closing cover 3 can be opened completely. The driving mechanism 4 is used to realize the translation of the inner closing cover 3 within the outer closing cover 2 and the translation of the outer closing cover 2 between the accommodating groove 11 and the accommodating cavity 13, thereby improving the opening and closing efficiency of the pit 1.

[0027] like Figure 2 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The driving mechanism 4 includes an outer rack 41, an inner rack 42, a driving assembly 43 and an adjusting assembly 44. The outer rack 41 slides horizontally between the accommodating groove 11 and the accommodating cavity 13 and is connected to the outer closing cover 2. The inner rack 42 slides horizontally between the accommodating groove 11 and the accommodating cavity 13 and is connected to the inner closing cover 3. The driving assembly 43 is used to drive the outer rack 41 or the inner rack 42 to move. The adjusting assembly 44 is used to drive the driving assembly 43 to connect to the outer rack 41 or the inner rack 42.

[0028] Specifically, when the outer closing cover 2 and the inner closing cover 3 are in an initial state of closing the opening of the storage pit 1 , the ends of the outer rack 41 and the inner rack 42 located in the accommodating cavity 13 are aligned.

[0029] When it is necessary to open the opening of the pit 1, the driving component 43 drives the inner rack 42 to slide toward the accommodating chamber 13, and then drives the inner closing cover 3 to open the opening of the pit 1. If it is necessary to open the entire opening of the pit 1, the driving component 43 continues to drive the inner closing cover 3 to slide, and the inner closing cover 3 drives the outer closing cover 2 to move together to open the opening of the pit 1; when it is necessary to close the opening of the pit 1, the driving component 43 first drives the inner rack 42 to reset, and then drives the driving component 43 to move to connect with the outer rack 41 through the adjusting component 44, and the driving component 43 then drives the outer rack 41 to reset, so that the opening of the pit 1 can be closed, thereby further improving the opening and closing efficiency of the pit 1.

[0030] like Figure 1 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: A plurality of first return springs 21 connected to the inner closing cover 3 are arranged in the outer closing cover 2 .

[0031] The first reset spring 21 is provided so that when the opening of the storage pit 1 needs to be closed after being fully opened, the driving component 43 does not need to first drive the inner rack 42 to reset, but directly drives the driving component 43 to connect with the outer rack 41 through the adjustment component 44. When the driving component 43 is separated from the inner rack 42, the first reset spring 21 drives the inner closing cover 3 to automatically slide toward the opening direction of the storage pit 1 to reset.

[0032] Furthermore, the friction force between the outer closing cover 2 and the inner walls of the accommodating groove 11 and the inner walls of the accommodating chamber 13 is greater than the elastic force of all the first return springs 21. Therefore, when the driving component 43 initially drives the inner closing cover 3 to slide toward the accommodating chamber 13, the compression of the first return spring 21 will not cause the outer closing cover 2 to move until the first return spring 21 is compressed to the limit and the inner closing cover 3 drives the outer closing cover 2 to move; when the opening of the storage pit 1 is fully opened and needs to be closed, the separation of the driving component 43 and the inner rack 42 resets the inner closing cover 3 and also does not cause the outer closing cover 2 to move, thereby keeping the position of the outer rack 41 stable, thereby improving the switching connection stability of the driving component 43 between the outer rack 41 and the inner rack 42.

[0033] Furthermore, in order to extend the service life of the first return spring 21, in the present embodiment, a push rod can be fixedly arranged on the end surface of the inner closing cover 3 located inside the outer closing cover 2. When the opening of the storage pit 1 needs to be fully opened, the sliding of the inner closing cover 3 drives the outer closing cover 2 to move through the push rod, thereby reducing the pressure on the first return spring 21.

[0034] like Figure 2 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The driving assembly 43 includes a driving motor 431 and a driving gear 432. The driving motor 431 is disposed on the adjusting assembly 44. The driving gear 432 is coaxially fixed on the output shaft of the driving motor 431. The driving gear 432 is used to mesh with the outer rack 41 and the inner rack 42 respectively.

[0035] Specifically, the outer rack 41 and the inner rack 42 are parallel to each other and located on the same horizontal plane.

[0036] When the driving gear 432 is engaged with the outer rack 41 or the inner rack 42, starting the driving motor 431 to rotate the driving gear 432 can drive the outer rack 41 or the inner rack 42 to move, thereby improving the translation efficiency of the outer closing cover 2 and the inner closing cover 3; the adjusting component 44 drives the driving motor 431 to slide along the axial direction of its output shaft, thereby realizing the switching of the driving gear 432 between the outer rack 41 and the inner rack 42.

[0037] like Figure 2 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The adjustment component 44 includes a drive cylinder 441 and a mounting plate 442. The drive cylinder 441 is arranged in the accommodating chamber 13. The extension direction of the drive cylinder 441 is parallel to the output shaft axis of the drive motor 431. The mounting plate 442 is fixed on the piston rod of the drive cylinder 441. The drive motor 431 is arranged on the mounting plate 442.

[0038] When the driving gear 432 needs to switch between the outer rack 41 and the inner rack 42, the driving cylinder 441 is started to move the mounting plate 442, which can drive the driving motor 431 and the driving gear 432 to slide, thereby improving the switching efficiency of the driving gear 432 between the outer rack 41 and the inner rack 42.

[0039] like Figure 2 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The driving mechanism 4 also includes a one-way limit component 45 and a release component 46. The one-way limit component 45 is arranged between the inner rack 42 and the inner top wall of the accommodating chamber 13. The one-way limit component 45 is used to limit the inner rack 42 from moving toward the storage pit 1 in real time, and the release component 46 is used to release the limitation of the one-way limit component 45 on the inner rack 42.

[0040] When the pit 1 is opened, the outer closing cover 2 moves by the push of the inner closing cover 3. Therefore, the setting of the one-way limit assembly 45 improves the stability of both the outer closing cover 2 and the inner closing cover 3 when the pit 1 is opened and after the opening is completed, avoiding the situation where the first reset spring 21 drives the inner closing cover 3 to reset when the pit 1 needs to be opened.

[0041] like Figures 2 to 4 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The one-way limit assembly 45 includes a ratchet 451, a pawl 452 and a second return spring 453. The ratchet 451 is arranged on the inner top wall of the accommodating chamber 13, and the pawl 452 is arranged on one side of the inner rack 42 and meshes with the ratchet 451. When the ratchet 451 and the pawl 452 are meshed, the inner rack 42 cannot move toward the direction of the pit 1; the ratchet 451 is slidably arranged on the inner top wall of the accommodating chamber 13 along the axial direction of the output shaft of the driving motor 431, and the second return spring 453 is arranged in the accommodating chamber 13 and connected to the ratchet 451. The release assembly 46 is used to drive the ratchet 451 to separate from the pawl 452.

[0042] When the driving assembly 43 drives the inner rack 42 to move, the pawl 452 moves on the ratchet 451, and the ratchet 451 can always limit the pawl 452, thereby improving the movement stability of the inner rack 42. When the storage pit 1 needs to be closed, the release assembly 46 drives the ratchet 451 to slide and separate from the pawl 452, and the first reset spring 21 can drive the inner closure cover 3 and the inner rack 42 to reset.

[0043] like Figures 2 to 5 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The release assembly 46 includes a fixed plate 461, a push plate 462, a connecting spring 463 and an extrusion block 464. The fixed plate 461 is fixedly connected to the output shaft of the drive motor 431. The outer end of the fixed plate 461 is provided with a connecting groove 4611. The bottom end of the push plate 462 is slidably connected in the connecting groove 4611. The connecting spring 463 is arranged in the connecting groove 4611 and connected to the push plate 462. One side of the outer end of the push plate 462 is provided with an inclined groove facing the ratchet 451. The inclined surface and the non-inclined surface of the outer end of the pushing plate 462 are simultaneously opposite to the side surface of the ratchet 451; the extrusion block 464 is fixed on the top wall of the accommodating chamber 13 and is used to be opposite to the inclined surface of the outer end of the pushing plate 462, and a socket 5411 for inserting the extrusion block 464 is provided on one side of the ratchet 451; when the extrusion block 464 extrudes the inclined surface of the outer end of the pushing plate 462, the non-inclined portion of the outer end of the pushing plate 462 moves toward the connecting groove 4611 and separates from the ratchet 451.

[0044] Specifically, when the driving gear 432 is meshed with the inner rack 42 , the fixing plate 461 and the pushing plate 462 are located between the inner rack 42 and the ratchet 451 .

[0045] When the storage pit 1 needs to be closed after opening, the adjustment component 44 drives the driving motor 431 to move, so that the driving gear 432 disengages from the inner rack 42 and moves toward the outer rack 41. At this time, the non-inclined part of the outer end of the pushing plate 462 pushes the ratchet 451, so that the ratchet 451 is separated from the pawl 452, and the first reset spring 21 drives the inner closing cover 3 and the inner rack 42 to reset; when the ratchet 451 moves to the extrusion block 464, the extrusion block 464 passes through the insertion hole 5411 and squeezes the inclined surface of the outer end of the pushing plate 462, so that the pushing plate 462 slides toward the connecting groove 4611. At this time, the driving motor 431 and the driving gear 432 continue to move, and the inclined surface of the outer end of the pushing plate 462 is squeezed by the side of the ratchet 451 and slides toward the connecting groove 4611 again until the fixed plate 461 and the pushing plate 462 pass through the ratchet 451. 1, the second return spring 453 drives the ratchet 451 to return to its original position; the driving motor 431 drives the driving gear 432 to rotate 180°, and under the premise that the driving gear 432 can still maintain automatic meshing with the outer rack 41, the fixing plate 461 and the pushing plate 462 are rotated to the bottom to avoid interference with the outer rack 41; after the driving motor 431 drives the driving gear 432 to return the outer rack 41 and the outer closure cover 2 to their original position, the adjusting component 44 drives the driving motor 431 and the driving gear 432 to return to the inner rack 42. At this time, the driving motor 431 rotates another 180° to make the positions of the fixing plate 461 and the pushing plate 462 again between the inner rack 42 and the ratchet 451, thereby improving the switching efficiency of the driving gear 432 between the inner rack 42 and the outer rack 41, as well as the separation and meshing efficiency of the ratchet 451 and the pawl 452.

[0046] like Figure 4 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: The top wall of the accommodating cavity 13 is provided with a slot 131, a slider 132 in the slot 131 is fixed to the top surface of the ratchet 451, and a second return spring 453 is arranged in the slot 131 and connected to the slider 132. In this embodiment, the slot 131 and the slider 132 may be dovetail-shaped or T-shaped.

[0047] The provision of the sliding groove 131 can limit the second return spring 453 and improve the sliding stability of the ratchet 451 .

[0048] like Figure 2 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: A laser transmitter facing away from the output shaft of the driving motor 431 is arranged on the fixing plate 461, a first laser receiver is arranged on the inner top wall of the accommodating cavity 13, and a second laser receiver is arranged on the inner bottom wall of the accommodating cavity 13; when the driving gear 432 is meshed with the inner rack 42, the first laser receiver is used to receive the laser emitted by the laser transmitter, and when the first laser receiver receives the laser, the outer end of the pushing plate 462 faces upward and one side is opposite to the ratchet 451; when the driving gear 432 is meshed with the outer rack 41, the second laser receiver is used to receive the laser emitted by the laser transmitter, and when the second laser receiver receives the laser, the outer end of the pushing plate 462 faces downward.

[0049] The arrangement of the laser emitter and the first laser receiver can improve the position accuracy of the fixed plate 461 and the push plate 462, so that the accuracy of the inclined surface and the non-inclined surface of the outer end of the push plate 462 facing the side of the ratchet 451 is higher, thereby making the extrusion position of the extrusion block 464 on the inclined surface of the outer end of the push plate 462 more accurate, thereby improving the overall operation stability; the arrangement of the laser emitter and the second laser receiver can more accurately determine the position of the fixed plate 461 and the push plate 462 after the driving gear 432 drives the outer rack 41 and the outer closure cover 2 to be reset, thereby avoiding the situation where the fixed plate 461 and the push plate 462 interfere with the ratchet 451 when the driving motor 431 and the driving gear 432 are reset toward the inner rack 42.

[0050] like Figure 2 and Figure 3 As shown, the present invention provides a specific implementation method based on the above implementation method as follows: A plurality of guide blocks 5 are fixed to the inner top wall of the accommodating cavity 13 , and guide rails 51 that slide in cooperation with the guide blocks 5 are fixed to the top surfaces of the outer rack 41 and the inner rack 42 along their length directions.

[0051] The coordinated sliding of the guide block 5 and the guide rail 51 improves the sliding stability of the outer rack 41 and the inner rack 42 , thereby improving the accuracy of the switching engagement between the driving gear 432 and the outer rack 41 and the inner rack 42 .

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

Claims

1. A translational automatic covering system for a near-surface radioactive waste disposal site, wherein a pit (1) for placing radioactive waste is provided on the ground, characterized in that: A receiving groove (11) is provided at a position near the opening on the inner side of the storage pit (1), an outer closing cover (2) is slidably provided in the receiving groove (11), the outer closing cover (2) is opened toward one end of the storage pit (1) and is slidably connected to an inner closing cover (3), a slot (12) for inserting an end of the inner closing cover (3) is provided at a position on the inner side of the storage pit (1) directly opposite to the receiving groove (11), the outer closing cover (2) and the inner closing cover (3) close the opening of the storage pit (1); the inner side of the receiving groove (11) is connected to a receiving chamber (13), and a driving mechanism (4) for driving the outer closing cover (2) or the inner closing cover (3) to move is provided in the receiving chamber (13).

2. The automatic translational covering system for a near-surface radioactive waste disposal site according to claim 1, characterized in that: The driving mechanism (4) comprises an outer gear rack (41), an inner gear rack (42), a driving assembly (43) and an adjusting assembly (44); the outer gear rack (41) slides horizontally between the accommodating groove (11) and the accommodating cavity (13) and is connected to the outer closing cover (2); the inner gear rack (42) slides horizontally between the accommodating groove (11) and the accommodating cavity (13) and is connected to the inner closing cover (3); the driving assembly (43) is used to drive the outer gear rack (41) or the inner gear rack (42) to move; and the adjusting assembly (44) is used to drive the driving assembly (43) to connect to the outer gear rack (41) or the inner gear rack (42).

3. The automatic translational covering system for a near-surface radioactive waste disposal site according to claim 2, characterized in that: A first return spring (21) connected to the inner closing cover (3) is arranged inside the outer closing cover (2).

4. The automatic translational covering system for a near-surface radioactive waste disposal site according to claim 3, characterized in that: The driving assembly (43) comprises a driving motor (431) and a driving gear (432); the driving motor (431) is arranged on the adjusting assembly (44); the driving gear (432) is coaxially fixed on the output shaft of the driving motor (431); and the driving gear (432) is used to mesh with the outer rack (41) and the inner rack (42), respectively.

5. The automatic translational covering system for a near-surface radioactive waste disposal site according to claim 4, characterized in that: The adjustment assembly (44) comprises a drive cylinder (441) and a mounting plate (442); the drive cylinder (441) is arranged in the accommodating chamber (13) and is perpendicular to the outer rack (41); the mounting plate (442) is fixed to the piston rod of the drive cylinder (441); and the drive motor (431) is arranged on the mounting plate (442).

6. The automatic translational covering system for a near-surface radioactive waste disposal site according to claim 4, characterized in that: The driving mechanism (4) further comprises a one-way limiting component (45) and a releasing component (46); the one-way limiting component (45) is arranged between the inner rack (42) and the inner top wall of the accommodating chamber (13); the one-way limiting component (45) is used to restrict the inner rack (42) from moving toward the storage pit (1) in real time; and the releasing component (46) is used to release the limitation of the inner rack (42) by the one-way limiting component (45).

7. The automatic translational covering system for a near-surface radioactive waste disposal site according to claim 6, characterized in that: The one-way limiting assembly (45) comprises a ratchet (451), a pawl (452) and a second return spring (453); the ratchet (451) is arranged on the inner top wall of the accommodating chamber (13); the pawl (452) is arranged on one side of the inner rack (42) and meshes with the ratchet (451); when the ratchet (451) and the pawl (452) are meshed, the inner rack (42) cannot move toward the storage pit (1); the ratchet (451) is slidably arranged on the inner top wall of the accommodating chamber (13) along the axis direction of the output shaft of the drive motor (431); the second return spring (453) is arranged in the accommodating chamber (13) and connected to the ratchet (451); the releasing assembly (46) is used to drive the ratchet (451) to separate from the pawl (452).

8. The automatic translational covering system for a near-surface radioactive waste disposal site according to claim 7, characterized in that: The release assembly (46) comprises a fixed plate (461), a push plate (462), a connecting spring (463) and an extrusion block (464); the fixed plate (461) is fixedly connected to the output shaft of the drive motor (431); a connecting groove (4611) is provided at the outer end of the fixed plate (461); the bottom end of the push plate (462) is slidably connected in the connecting groove (4611); the connecting spring (463) is arranged in the connecting groove (4611) and connected to the push plate (462); and a ratchet (451) is provided on one side of the outer end of the push plate (462). The inclined surface of the outer end of the push plate (462) and the non-inclined surface are simultaneously opposite to the side of the ratchet (451); the extrusion block (464) is fixed on the top wall of the accommodating cavity (13) and is used to be opposite to the inclined surface of the outer end of the push plate (462); one side of the ratchet (451) is provided with an insertion hole (5411) for inserting the extrusion block (464); when the extrusion block (464) extrudes the inclined surface of the outer end of the push plate (462), the non-inclined portion of the outer end of the push plate (462) moves toward the connecting groove (4611) and separates from the ratchet (451).

9. The automatic translational covering system for a near-surface radioactive waste disposal site according to claim 7, characterized in that: A sliding groove (131) is formed on the top wall of the accommodating cavity (13); a sliding block (132) located in the sliding groove (131) is fixed to the top surface of the ratchet (451); and the second return spring (453) is disposed in the sliding groove (131) and connected to the sliding block (132).

10. The automatic translational covering system for a near-surface radioactive waste disposal site according to claim 8, characterized in that: The fixing plate (461) is provided with a laser transmitter facing away from the output shaft of the driving motor (431); the top wall of the accommodating cavity (13) is provided with a first laser receiver; and the bottom wall of the accommodating cavity (13) is provided with a second laser receiver; when the driving gear (432) is meshed with the inner rack (42), the first laser receiver is used to receive laser light emitted by the laser transmitter; when the first laser receiver receives laser light, the outer end of the pushing plate (462) faces upward and one side faces the ratchet (451); when the driving gear (432) is meshed with the outer rack (41), the second laser receiver is used to receive laser light emitted by the laser transmitter; when the second laser receiver receives laser light, the outer end of the pushing plate (462) faces downward.

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