Radiation shielding cover plate for warehouse pit of gamma source warehouse

Abstract

The utility model provides a radiation shielding cover plate for a gamma source warehouse pit, which belongs to the technical field of radiation shielding of radioactive source warehouse pits, and comprises an upper cover plate and a lower cover plate fixed on the bottom surface of the upper cover plate, the upper cover plate is buckled on the warehouse pit and seals the warehouse pit, and the lower cover plate is fixed on the bottom surface of the upper cover plate. The lower cover plate is located in the garage pit, a plurality of rows of pulleys are arranged on the bottom face of the lower cover plate, and inclined faces for the pulleys to slide are arranged on the tops of the two side walls, facing the sliding direction of the pulleys, in the garage pit. A positioning assembly used for fixing the upper cover plate to be in the closed storehouse pit state is arranged on one side of the storehouse pit. According to the radiation shielding cover plate, through the arrangement of the pulleys, a worker can conveniently move the upper cover plate and the lower cover plate on the ground, through the arrangement of the inclined planes on the edges of the warehouse pit, the upper cover plate and the lower cover plate can directly slide away from the warehouse pit opening, and the moving convenience of the radiation shielding cover plate is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of radiation shielding of radioactive source pits, and more specifically, relates to a radiation shielding cover plate for a γ source pit. Background Art

[0002] A radioactive source storage facility is a special storage facility for storing various types of radioactive gamma sources used in nuclear technology utilization activities.

[0003] A large number of radioactive sources are used in nuclear technology utilization activities. The radiation dose of the radioactive sources is high, resulting in high background radiation in the warehouse, which will bring radiation safety risks to the operators of the radioactive source warehouse. The radioactive sources are stored in the warehouse pit, which needs to be covered with a shielding cover to shield the ionizing radiation.

[0004] At present, most radioactive source storage pit covers are generally made of prefabricated concrete panels that are directly covered on the pit. The covers are usually heavy, weighing nearly several hundred kilograms, and operators cannot move them directly. They need to be moved by a crane, which is costly and causes inconvenience in lifting and installation. Utility Model Content

[0005] The utility model aims to provide a radiation shielding cover for a gamma source storage pit, so as to solve the technical problem in the prior art that the radioactive source storage pit cover needs to be moved by a crane, which leads to high costs and inconvenience in lifting and installation.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a radiation shielding cover plate for a γ source storage pit, including an upper cover plate and a lower cover plate fixed on the bottom surface of the upper cover plate, the upper cover plate is buckled on the storage pit and closes it, the lower cover plate is located inside the storage pit, a plurality of rows of pulleys are arranged on the bottom surface of the lower cover plate, and the tops of the two side walls in the storage pit facing the sliding direction of the pulleys are provided with inclined surfaces for the pulleys to slide; a positioning component for fixing the upper cover plate in a closed storage pit state is provided on one side of the storage pit.

[0007] In combination with the above technical solution, in a possible implementation, the top surface of the upper cover plate is provided with a take-in / put-out opening that passes through the lower cover plate, and a slide is slidably provided on the top surface of the upper cover plate to close the take-in / put-out opening; the pulley is also provided on the bottom surface of the slide, and the positioning assembly is also provided between the slide and the upper cover plate, and the positioning assembly is used to fix the slide in a state of closing the take-in / put-out opening.

[0008] In combination with the above technical solution, in a possible implementation, the upper cover plate and the side of the slide plate facing the sliding direction thereof are both provided with tracks for the corresponding pulleys to slide inside.

[0009] In combination with the above technical solution, in a possible implementation method, the positioning assembly includes a one-to-one corresponding positioning plate, a positioning spring and a positioning block; the positioning plate is fixed to one side of the sliding direction of the upper cover plate and the slide plate, and the upper cover plate and the slide plate are provided with a positioning groove toward the side wall corresponding to the positioning plate, the positioning spring is arranged in the corresponding positioning groove, and the positioning block is slidably arranged at the opening of the corresponding positioning groove and connected to the corresponding positioning spring; the positioning plate is provided with a fixing groove connected to the corresponding positioning groove toward the side wall of the corresponding upper cover plate or the slide plate; when the positioning spring is in a natural state, the positioning block is simultaneously located in the positioning groove and the fixing groove, and the positioning block is located in the fixing groove and is inclined toward the side of the sliding direction corresponding to the upper cover plate or the slide plate; an unlocking mechanism for releasing the corresponding positioning assembly from fixing its own position is arranged on one side of the upper cover plate and the slide plate.

[0010] In combination with the above technical solution, in a possible implementation method, the unlocking mechanism includes a pressure rod, a return spring, a push rod and a linkage assembly; the pressure rod slides up and down on one side of the upper cover plate and the slide plate, and a pressure groove is provided on the upper surface of the upper cover plate and the ground; the return spring is arranged in the corresponding pressure groove and is connected to the corresponding pressure rod; the positioning plate is provided with an unlocking groove connected to the corresponding fixed groove on the side away from the corresponding upper cover plate and the slide plate, and one end of the push rod is slidably arranged in the unlocking groove; the linkage assembly is arranged between the pressure rod and the push rod, and when the pressure rod descends, the linkage assembly drives the push rod to move toward the fixed groove until the positioning block disengages from the fixed groove.

[0011] In combination with the above technical solution, in a possible implementation method, the linkage assembly includes a gear and a rack, the gear is rotatably connected to the top surface of the corresponding upper cover plate or the ground, and teeth are provided on one side of the pressure rod and mesh with the corresponding gear; the rack is fixed parallel to the bottom surface of the push rod outside the unlocking groove and meshes with the corresponding gear.

[0012] In combination with the above technical solution, in a possible implementation manner, a pedal is fixed to the top end of the pressure rod.

[0013] In combination with the above technical solution, in a possible implementation method, a limiting block is fixed on the inner wall of the pressure groove, and when the bottom end of the pressure rod contacts the limiting block, the inner end of the push rod is located at the inner opening of the fixed groove, and the positioning block is completely located in the positioning groove.

[0014] The beneficial effect of a radiation shielding cover plate for a γ source storage pit provided by the utility model is that: compared with the prior art, the utility model facilitates the staff to move the upper cover plate and the lower cover plate on the ground through the setting of the pulley. After the upper cover plate is moved to close the storage pit, the positioning assembly fixes the position of the upper cover plate to avoid nuclear radiation to the human body after the upper cover plate is separated from the storage pit. The setting of the inclined surface at the edge of the storage pit can make the upper cover plate and the lower cover plate slide away directly from the storage pit mouth, thereby improving the mobility of the radiation shielding cover plate. 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 radiation shielding cover plate for a γ source storage pit provided in an embodiment of the utility model;

[0017] Figure 2 A top view of a radiation shielding cover plate for a γ source storage pit provided in an embodiment of the utility model;

[0018] Figure 3 A partial cross-sectional view of a positioning assembly provided in an embodiment of the utility model;

[0019] Figure 4 A partial cross-sectional view of the unlocking mechanism provided in an embodiment of the utility model.

[0020] Among them, the reference numerals in the figures are as follows:

[0021] 1. Upper cover; 11. Take-in and put-out port; 2. Lower cover; 3. Pulley; 4. Slide plate; 41. Track; 5. Positioning assembly; 51. Positioning plate; 511. Fixing slot; 512. Unlocking slot; 52. Positioning spring; 521. Positioning slot; 53. Positioning block; 6. Unlocking mechanism; 61. Press rod; 611. Pedal; 62. Return spring; 621. Pressing slot; 622. Limiting block; 63. Push rod; 64. Linkage assembly; 641. Gear; 642. Rack. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model 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, not all of the embodiments, and the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0023] 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, some specific forms and settings of 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.

[0024] 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.

[0025] 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. They are only for the convenience of describing the present invention and simplifying the description, and 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. Therefore, they should not be understood as limitations on the present invention.

[0026] 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.

[0027] 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 utility model, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0028] A radiation shielding cover plate for a γ source storage pit provided by the utility model is now described.

[0029] like Figure 1 and Figure 2 As shown, one embodiment of the utility model provides a radiation shielding cover for a γ source storage pit, including an upper cover 1 and a lower cover 2 fixed to the bottom surface of the upper cover 1, the upper cover 1 is buckled on the storage pit and closes it, the lower cover 2 is located inside the storage pit, a plurality of rows of pulleys 3 are arranged on the bottom surface of the lower cover 2, and inclined surfaces for sliding of the pulleys 3 are arranged on the tops of the two side walls in the storage pit facing the sliding direction of the pulleys 3; a positioning component 5 for fixing the upper cover 1 in a closed storage pit state is arranged on one side of the storage pit.

[0030] The radiation shielding cover for a γ source storage pit provided in the present embodiment is convenient for workers to move the upper cover 1 and the lower cover 2 on the ground compared with the prior art through the setting of the pulley 3. After the upper cover 1 is moved to close the storage pit, the positioning assembly 5 fixes the position of the upper cover 1 to avoid nuclear radiation to the human body after the upper cover 1 is separated from the storage pit. The setting of the inclined surface at the edge of the storage pit enables the upper cover 1 and the lower cover 2 to slide directly away from the storage pit mouth, thereby improving the mobility of the radiation shielding cover.

[0031] like Figure 1 to Figure 2As shown, the utility model provides a specific implementation method based on the above implementation method as follows:

[0032] The top surface of the upper cover plate 1 is provided with a take-in / put-out opening 11 which passes through the lower cover plate 2, and a slide plate 4 is slidably provided on the top surface of the upper cover plate 1 to close the take-in / put-out opening 11; the pulley 3 is also provided on the bottom surface of the slide plate 4, and the positioning assembly 5 is also provided between the slide plate 4 and the upper cover plate 1, and this positioning assembly 5 is used to fix the slide plate 4 in a state of closing the take-in / put-out opening 11.

[0033] After releasing the positioning assembly 5 from fixing the slide plate 4, the slide plate 4 can be slid to open the access opening 11, and a small amount of radioactive sources can be taken in and out through the access opening 11 without moving the upper cover plate 1 and the lower cover plate 2, thereby improving the convenience of taking in and out the radioactive sources.

[0034] Optionally, in this embodiment, the upper cover plate 1, the lower cover plate 2 and the slide plate 4 are all formed by upper and lower combinations of steel plates and lead plates.

[0035] like Figure 1 to Figure 2 As shown, the utility model provides a specific implementation method based on the above implementation method as follows:

[0036] The upper cover plate 1 and the sliding plate 4 are both provided with rails 41 on the sides facing the sliding direction thereof for the corresponding pulleys 3 to slide inside.

[0037] Specifically, one set of rails 41 is set on the ground, and the upper cover plate 1 is slidably set on this set of rails 41; another set of rails 41 is set on the top surface of the upper cover plate 1, and the slide plate 4 is slidably set on this set of rails 41.

[0038] The arrangement of the track 41 can guide the sliding of the upper cover plate 1 and the slide plate 4 , so as to improve the sliding stability of the upper cover plate 1 and the slide plate 4 .

[0039] like Figures 2 to 3 As shown, the utility model provides a specific implementation method based on the above implementation method as follows:

[0040] The positioning assembly 5 includes a one-to-one corresponding positioning plate 51, a positioning spring 52 and a positioning block 53; the positioning plate 51 is fixed to one side of the sliding direction of the upper cover plate 1 and the slide plate 4, and a positioning groove 521 is provided on the side wall of the upper cover plate 1 and the slide plate 4 facing the corresponding positioning plate 51, the positioning spring 52 is arranged in the corresponding positioning groove 521, and the positioning block 53 is slidably arranged at the opening of the corresponding positioning groove 521 and connected with the corresponding positioning spring 52; the positioning plate 51 is provided with a fixing groove 511 connected to the corresponding positioning groove 521 on the side wall facing the corresponding upper cover plate 1 or the slide plate 4; when the positioning spring 52 is in a natural state, the positioning block 53 is simultaneously located in the positioning groove 521 and the fixing groove 511, and the positioning block 53 is located in the fixing groove 511 and is inclined toward one side of the sliding direction of the corresponding upper cover plate 1 or the slide plate 4; an unlocking mechanism 6 for releasing the corresponding positioning assembly 5 from fixing its own position is provided on one side of the upper cover plate 1 and the slide plate 4.

[0041] Specifically, in this embodiment, the side wall of the positioning plate 51 is in contact with the corresponding side wall of the upper cover plate 1 or the side wall of the slide plate 4 .

[0042] When the upper cover 1 is moved to close the storage pit or the sliding plate 4 is moved to close the loading and unloading port 11, the positioning plate 51 squeezes the inclined surface of the moving positioning block 53 so that the positioning block 53 completely enters the positioning groove 521 until the upper cover 1 or the sliding plate 4 drives the positioning groove 521 to move to communicate with the corresponding fixed groove 511, and the elastic force of the positioning spring 52 pushes one end of the positioning block 53 into the fixed groove 511 to realize automatic fixation of the upper cover 1 or the sliding plate 4. At this time, the upper cover 1 closes the storage pit or the sliding plate 4 closes the loading and unloading port 11, thereby improving the positioning efficiency of the upper cover 1 and the sliding plate 4.

[0043] like Figures 2 to 4 As shown, the utility model provides a specific implementation method based on the above implementation method as follows:

[0044] The unlocking mechanism 6 includes a pressure rod 61, a return spring 62, a push rod 63 and a linkage assembly 64; the pressure rod 61 slides and rises and falls on one side of the upper cover plate 1 and the slide plate 4, and a pressure groove 621 is provided on the upper surface of the upper cover plate 1 and the ground; the return spring 62 is arranged in the corresponding pressure groove 621 and is connected to the corresponding pressure rod 61; the side of the positioning plate 51 away from the corresponding upper cover plate 1 and the slide plate 4 is provided with an unlocking groove 512 connected to the corresponding fixing groove 511, and one end of the push rod 63 is slidably arranged in the unlocking groove 512; the linkage assembly 64 is arranged between the pressure rod 61 and the push rod 63, and when the pressure rod 61 descends, the linkage assembly 64 drives the push rod 63 to move toward the fixing groove 511 until the positioning block 53 is separated from the fixing groove 511.

[0045] When it is necessary to move the upper cover plate 1 or the slide plate 4, the pressure rod 61 is pressed downward to compress the return spring 62. At the same time, the pressure rod 61 drives the push rod 63 to move toward the fixed groove 511 through the linkage assembly 64 until the positioning block 53 is completely pushed into the positioning groove 521. At this time, the upper cover plate 1 can be slid to open the storage pit or the slide plate 4 can be slid to open the loading and unloading port 11.

[0046] like Figures 2 to 4 As shown, the utility model provides a specific implementation method based on the above implementation method as follows:

[0047] The linkage assembly 64 includes a gear 641 and a rack 642. The gear 641 is rotatably connected to the top surface of the corresponding upper cover plate 1 or the ground. One side of the pressure rod 61 is provided with teeth and meshes with the corresponding gear 641; the rack 642 is fixed parallel to the bottom surface of the top rod 63 located outside the unlocking groove 512 and meshes with the corresponding gear 641.

[0048] When the pressure rod 61 moves downward, it drives the gear 641 to rotate, and the gear 641 drives the push rod 63 to move through the rack 642, thereby improving the linkage effect between the pressure rod 61 and the push rod 63.

[0049] like Figures 2 to 4 As shown, the utility model provides a specific implementation method based on the above implementation method as follows:

[0050] A pedal 611 is fixed to the top end of the pressure rod 61 .

[0051] Furthermore, a limiting block 622 is fixed to the inner wall of the pressing groove 621 . When the bottom end of the pressing rod 61 contacts the limiting block 622 , the inner end of the push rod 63 is located at the inner opening of the fixing groove 511 , and the positioning block 53 is completely located in the positioning groove 521 .

[0052] Due to the restriction of the limit block 622 on the pressure rod 61, the staff can release the fixation of the upper cover plate 1 or the slide plate 4 by simply stepping on the pedal 611 to the bottom, thereby improving the convenience of operation.

[0053] 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.

[0054] 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.

[0055] 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 present application. At the same time, 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 the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization 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, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

Claims

1. A radiation shielding cover plate for a γ source storage pit, characterized in that: The utility model comprises an upper cover plate (1) and a lower cover plate (2) fixed to the bottom surface of the upper cover plate (1); the upper cover plate (1) is buckled on the storage pit to close it; the lower cover plate (2) is located inside the storage pit; a plurality of rows of pulleys (3) are arranged on the bottom surface of the lower cover plate (2); inclined surfaces for sliding of the pulleys (3) are arranged on the tops of the two side walls in the storage pit facing the sliding direction of the pulleys (3); and a positioning component (5) for fixing the upper cover plate (1) in a closed storage pit state is arranged on one side of the storage pit.

2. A radiation shielding cover plate for a γ source storage pit according to claim 1, characterized in that: The top surface of the upper cover plate (1) is provided with a take-in / take-out opening (11) penetrating the lower cover plate (2); the top surface of the upper cover plate (1) is slidably provided with a slide plate (4) for closing the take-in / take-out opening (11); the pulley (3) is also provided on the bottom surface of the slide plate (4); the positioning assembly (5) is also provided between the slide plate (4) and the upper cover plate (1); the positioning assembly (5) is used to fix the slide plate (4) in a state of closing the take-in / take-out opening (11).

3. A radiation shielding cover plate for a γ source storage pit according to claim 2, characterized in that: The upper cover plate (1) and the slide plate (4) are both provided with tracks (41) on the sides facing the sliding direction of the upper cover plate (1) and the slide plate (4), for the corresponding pulley (3) to slide inside.

4. A radiation shielding cover plate for a γ source storage pit as claimed in claim 2, characterized in that: The positioning assembly (5) comprises a one-to-one corresponding positioning plate (51), a positioning spring (52) and a positioning block (53); the positioning plate (51) is fixed to one side of the sliding direction of the upper cover plate (1) and the slide plate (4); the upper cover plate (1) and the slide plate (4) are provided with a positioning groove (521) on the side wall facing the corresponding positioning plate (51); the positioning spring (52) is arranged in the corresponding positioning groove (521); the positioning block (53) is slidably arranged at the opening of the corresponding positioning groove (521) and is connected to the corresponding positioning spring (52); the positioning plate (51) faces the corresponding The side wall of the upper cover plate (1) or the slide plate (4) is provided with a fixing groove (511) connected to the corresponding positioning groove (521); when the positioning spring (52) is in a natural state, the positioning block (53) is located in both the positioning groove (521) and the fixing groove (511), and the positioning block (53) is located in the fixing groove (511) and is inclined toward a side corresponding to the sliding direction of the upper cover plate (1) or the slide plate (4); an unlocking mechanism (6) for releasing the corresponding positioning assembly (5) from fixing its own position is provided on one side of the upper cover plate (1) or the slide plate (4).

5. A radiation shielding cover plate for a γ source storage pit according to claim 4, characterized in that: The unlocking mechanism (6) comprises a pressure rod (61), a return spring (62), a push rod (63) and a linkage assembly (64); the pressure rod (61) is slidably raised and lowered on one side of the upper cover plate (1) and the slide plate (4); a pressure groove (621) is provided on the upper surface of the upper cover plate (1) and the ground; the return spring (62) is arranged in the corresponding pressure groove (621) and is connected to the corresponding pressure rod (61); the positioning plate (51) is away from the corresponding upper cover plate (1) and the slide plate (4); One side of the slide plate (4) is provided with an unlocking groove (512) connected to the corresponding fixing groove (511), and one end of the push rod (63) is slidably arranged in the unlocking groove (512); the linkage component (64) is arranged between the pressure rod (61) and the push rod (63), and when the pressure rod (61) descends, the linkage component (64) drives the push rod (63) to move toward the fixing groove (511) until the positioning block (53) is separated from the fixing groove (511).

6. A radiation shielding cover plate for a γ source storage pit according to claim 5, characterized in that: The linkage assembly (64) comprises a gear (641) and a rack (642); the gear (641) is rotatably connected to the top surface of the corresponding upper cover plate (1) or the ground; one side of the pressure rod (61) is provided with teeth and meshes with the corresponding gear (641); the rack (642) is fixed in parallel to the bottom surface of the push rod (63) outside the unlocking groove (512) and meshes with the corresponding gear (641).

7. A radiation shielding cover plate for a γ source storage pit according to claim 5 or 6, characterized in that: A pedal (611) is fixed to the top end of the pressure rod (61).

8. A radiation shielding cover plate for a γ source storage pit according to claim 7, characterized in that: A limiting block (622) is fixed on the inner wall of the pressing groove (621); when the bottom end of the pressing rod (61) contacts the limiting block (622), the inner end of the push rod (63) is located at the inner opening of the fixing groove (511), and the positioning block (53) is completely located in the positioning groove (521).

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