Foldable neutron source shielding cover plate

Abstract

The utility model provides a foldable neutron source shielding cover plate and belongs to the nuclear technology field. The cover plate comprises a cover plate body, a pushing piece, a locking unit, a monitoring unit and a control unit. When the cover plate needs to cover the storage well, the control unit is started, the control unit controls the pushing piece to conduct pushing movement, the cover plate is driven to rotate, the cover plate covers the storage well, then an operator screws the nut, the nut extrudes the elastic bag, and the elastic bag pushes the first connecting rod to stretch out of the hollow cavity and be connected with the well wall in an inserted mode after being pressed. When the cover plate needs to be opened, an operator firstly rotates a nut and cancels the extrusion force of the nut on the elastic bag, so that the pressure in the elastic bag returns to normal, and the first connecting rod is driven to be separated from the well wall; secondly, the control unit is started, the control unit controls the pushing piece to gradually push out the cover plate, automation of the opening and closing process of the cover plate is achieved, the cover plate is further locked through the locking unit, and the safety in the nuclear material storage process is improved.

Description

Technical Field

[0001] The utility model belongs to the field of nuclear technology, and more specifically relates to a foldable neutron source shielding cover. Background Art

[0002] 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. Radioactive sources are stored in storage wells in the warehouse. The storage wells need to be covered with shielding covers to shield ionizing radiation. At present, most radioactive source warehouse storage well covers are generally made of prefabricated concrete panels directly covering the storage wells. The covers are usually heavy, weighing more than 100kg, and the operators cannot carry them directly. They need to be moved by crane, which is costly and inconvenient for lifting and installation. Utility Model Content

[0003] The utility model aims to provide a foldable neutron source shielding cover plate to solve the technical problem in the prior art that the cover plate is heavy and thus inconvenient to move.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is to provide a foldable neutron source shielding cover, including a cover body, a push piece, a locking unit, a monitoring unit and a control unit. One end of the cover body is rotatably connected to the edge of the storage well, the cover body is provided with a hollow chamber, the cover body is provided with a slide groove along the length direction, and a slider is provided in the slide groove; the push piece is arranged in the storage well, one end of the push piece is rotatably connected to the well wall, and the other end of the push piece is rotatably connected to the slider; the locking unit is arranged in the hollow chamber, and the locking unit includes a threaded rod, a nut, an elastic bag and a first connecting rod; the threaded rod is vertically arranged in the hollow chamber, and one end of the threaded rod is fixedly connected to the bottom of the hollow chamber, The nut is sleeved on the threaded rod, the elastic bag is arranged at the bottom of the hollow chamber, and the elastic bag is sleeved and connected to the threaded rod; the first connecting rod is arranged at an angle to the threaded rod, one end of the first connecting rod is connected to the elastic bag, the other end of the first connecting rod is passed through the cover body, and the other end of the first connecting rod is plugged into the well wall; the monitoring unit is arranged on a side of the cover body close to the well wall, and the monitoring unit is used for real-time monitoring of the storage well; the control unit is electrically connected to the push member and the monitoring unit respectively.

[0005] In a possible implementation, a pressure plate is further provided between the nut and the elastic bag, and the pressure plate is sleeved on the threaded rod.

[0006] In a possible implementation, it further includes an anti-loosening unit, which is arranged between the edge of the storage well and the cover plate body.

[0007] In a possible implementation, the side wall of the cover body is provided with two insertion holes, the inner wall of the cover body is provided with a pressure block, and the anti-loosening unit includes two second connecting rods, two transmission rods and a spring. One end of the two second connecting rods are rotatably connected to each other, and the other end of the second connecting rod is penetrated through the well wall, and the second connecting rod is rotatably connected to the well wall; two transmission rods are arranged one-to-one with the two second connecting rods, the transmission rod is vertically penetrated through the well wall, and one end of the transmission rod is rotatably connected to the other end of the second connecting rod, and the other end of the transmission rod is inserted into the insertion hole; the spring is arranged horizontally, and the two ends of the spring are respectively connected to the rod bodies of the two second connecting rods.

[0008] In a possible implementation, the well wall includes a supporting portion and a limiting portion, the limiting portion is disposed on the supporting portion, and the limiting portion is an annular protrusion.

[0009] In a possible implementation, a sealing ring is further included, and the sealing ring is arranged between the cover plate body and the well wall.

[0010] In a possible implementation, there are two pushing members.

[0011] In a possible implementation, boron-containing polyethylene is coated inside the cover plate body.

[0012] In a possible implementation, a mobile device is further included, and the mobile device is connected to the control unit via real-time electrical signals.

[0013] In a possible implementation, a handle is provided on the outer end surface of the cover body.

[0014] The utility model provides a foldable neutron source shielding cover plate with beneficial effects in that: compared with the prior art, the utility model includes a cover plate body, a push piece, a locking unit, a monitoring unit and a control unit. When the cover plate needs to cover the storage well, the control unit is started, and the control unit controls the push piece to push and drive the cover plate to rotate, so that the cover plate covers the storage well, and then the operator tightens the nut, and the nut squeezes the elastic bag, and the elastic bag is pressed to push the first connecting rod out of the hollow chamber and plug into the well wall. When the cover plate needs to be opened, the operator first rotates the nut to cancel the squeezing force of the nut on the elastic bag, so that the pressure inside the elastic bag returns to normal, driving the first connecting rod to separate from the well wall; secondly, the control unit is started, and the control unit controls the push piece to gradually push the cover plate out, which not only realizes the automation of the opening and closing process of the cover plate, but also further locks the cover plate through the locking unit, thereby improving the safety of the nuclear material storage process. 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 schematic diagram of the structure of a foldable neutron source shielding cover and a storage well provided in an embodiment of the utility model;

[0017] Figure 2 A cross-sectional view of the connection structure of a locking unit of a foldable neutron source shielding cover provided in an embodiment of the utility model;

[0018] Figure 3 A schematic structural diagram of the initial state of the anti-loosening unit provided in an embodiment of the utility model;

[0019] Figure 4 A structural schematic diagram of the working state of the anti-loosening unit provided in an embodiment of the utility model;

[0020] 1. Cover plate body; 11. Pressure block; 10. Storage well; 101. Supporting part; 102. Limiting part; 2. Pushing member; 3. Locking unit; 31. Threaded rod; 32. Nut; 33. Pressure plate; 34. Elastic bag; 35. First connecting rod; 4. Anti-loosening unit; 41. Second connecting rod; 42. Transmission rod; 43. Spring. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] 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.

[0023] 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.

[0024] The directions or positional relationships indicated by terms such as "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 accompanying 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 a limitation on the present invention.

[0025] 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.

[0026] A foldable neutron source shielding cover provided by the utility model is now described.

[0027] Please also read Figure 1 and Figure 2The first embodiment of the utility model provides a spacer rod 1 installation device including a cover body 1, a push piece 2, a locking unit 3, a monitoring unit and a control unit. One end of the cover body 1 is rotatably connected to the well edge of the storage well 10, and the cover body 1 is provided with a hollow chamber, and the cover body 1 is provided with a slide groove along the length direction, and a slider is provided in the slide groove; the push piece 2 is arranged in the storage well 10, and one end of the push piece 2 is rotatably connected to the well wall, and the other end of the push piece 2 is rotatably connected to the slider; the locking unit 3 is arranged in the hollow chamber, and the locking unit 3 includes a threaded rod 31, a nut 32, an elastic bag 34 and a first connecting rod 35; the threaded rod 31 is vertically arranged in the hollow chamber, and one end of the threaded rod 31 is fixedly connected to the bottom of the hollow chamber, The nut 32 is sleeved on the threaded rod 31, the elastic bag 34 is arranged at the bottom of the hollow chamber, and the elastic bag 34 is sleeved and connected with the threaded rod 31; the first connecting rod 35 is arranged at an angle with the threaded rod 31, one end of the first connecting rod 35 is connected to the elastic bag 34, the other end of the first connecting rod 35 is penetrated through the cover body 1, and the other end of the first connecting rod 35 is plugged into the well wall; the monitoring unit is arranged on the side of the cover body 1 close to the well wall, and the monitoring unit is used for real-time monitoring of the storage well 10; the control unit is electrically connected to the push member 2 and the monitoring unit respectively.

[0028] The present embodiment provides a foldable neutron source shielding cover. Compared with the prior art, the utility model includes a cover body 1, a push piece 2, a locking unit 3, a monitoring unit and a control unit. When the cover needs to cover the storage well 10, the control unit is started, and the control unit controls the push piece 2 to push and drive the cover to rotate, so that the cover covers the storage well 10. Then the operator tightens the nut 32, and the nut 32 squeezes the elastic capsule 34. After the elastic capsule 34 is compressed, it pushes the first connecting rod 35 out of the hollow chamber and plugs into the well wall. When the cover needs to be opened, the operator first rotates the nut 32 to cancel the squeezing force of the nut 32 on the elastic capsule 34, so that the pressure inside the elastic capsule 34 returns to normal, driving the first connecting rod 35 to separate from the well wall; secondly, the control unit is started, and the control unit controls the push piece 2 to gradually push the cover out, which not only realizes the automation of the opening and closing process of the cover, but also further locks the cover through the locking unit 3, thereby improving the safety of the nuclear material storage process.

[0029] Please also read Figure 3 The utility model provides a specific embodiment based on the above embodiment as follows: a pressure plate 33 is provided between the nut 32 and the elastic bag 34, and the pressure plate 33 is sleeved on the threaded rod 31. The pressure plate 33 is provided to increase the range of action on the elastic bag 34 and squeeze the elastic bag 34 more effectively.

[0030] Please also read Figure 3 On the basis of the above-mentioned embodiment, the utility model further includes: an anti-loosening unit 4, which is arranged between the well edge of the storage well 10 and the cover body 1.

[0031] Avoid violent removal of the cover

[0032] See also Figure 3 and Figure 4 In a possible implementation, the side wall of the cover body 1 is provided with two insertion holes, the inner wall of the cover body 1 is provided with a pressure block 11, and the anti-loosening unit 4 includes two second connecting rods 41, two transmission rods 42 and a spring 43. One end of the two second connecting rods 41 is rotatably connected to each other, and the other end of the second connecting rod 41 is penetrated through the well wall, and the second connecting rod 41 is rotatably connected to the well wall; the two transmission rods 42 are arranged one-to-one with the two second connecting rods 41, the transmission rod 42 is vertically penetrated through the well wall, and one end of the transmission rod 42 is rotatably connected to the other end of the second connecting rod 41, and the other end of the transmission rod 42 is inserted into the insertion hole; the spring 43 is arranged horizontally, and the two ends of the spring 43 are respectively connected to the rod bodies of the two second connecting rods 41. Among them, an oblong hole is opened on the second connecting rod 41 at the connection between the second connecting rod 41 and the transmission rod 42.

[0033] When the cover covers the storage well 10, the pressure block 11 squeezes the second connecting rod 41. Since the second connecting rod 41 is rotatably connected to the well wall, the other end of the second connecting rod 41 transfers the pressure to the transmission rod 42, driving the transmission rod 42 to move upward along the vertical direction of the well wall. The other end of the transmission rod 42 is inserted into the socket, thereby clamping the cover body 1 to prevent the cover body 1 from loosening.

[0034] When the cover body 1 is pushed and separated by the pushing member 2, the pressure acting on the second connecting rod 41 gradually decreases until it disappears, so the two second connecting rods 41 return to their initial state under the elastic force of the spring 43, and at the same time drive the transmission rod 42 to separate from the socket.

[0035] See also Figure 2 Further, the well wall includes a supporting portion 101 and a limiting portion 102, wherein the limiting portion 102 is disposed on the supporting portion 101 and is an annular protrusion. The cover plate body 1 is adapted to the well wall, further improving the sealing and safety of the cover plate and the well wall.

[0036] Since the cover plate body 1 is rotatably connected to the well wall, a sealing ring is provided between the cover plate body 1 and the well wall to seal the gap and prevent neutrons from leaking into the external environment.

[0037] Furthermore, there are two pushing members 2, and the two pushing members 2 are symmetrically arranged along the width of the cover body 1, thereby improving the stability of the cover body 1 during the flipping process.

[0038] Furthermore, boron-containing polyethylene is applied inside the cover body 1. Boron-containing polyethylene can effectively isolate neutrons from escaping into the external environment.

[0039] On the basis of the above embodiment, the utility model further comprises a mobile device, which is connected to the control unit in real time by electrical signals. The situation in the storage well 10 can be remotely monitored in real time through the mobile device.

[0040] Furthermore, a handle is provided on the outer end surface of the cover body 1. The handle is provided to facilitate operation by the staff.

[0041] When the volume of the wellhead of the storage well 10 is too large, multiple covers for the nuclear material storage wells 10 may be provided.

[0042] 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.

Claims

1. A foldable neutron source shielding cover, characterized in that: include: A cover plate body (1) has one end rotatably connected to the well edge of the storage well (10), the cover plate body (1) is provided with a hollow chamber, the cover plate body (1) is provided with a slide groove along the length direction, and a slider is provided in the slide groove; A push member (2) is arranged in the storage well (10), one end of the push member (2) is rotatably connected to the well wall, and the other end of the push member (2) is rotatably connected to the slider; A locking unit (3) is arranged in the hollow chamber, and the locking unit (3) comprises a threaded rod (31), a nut (32), an elastic bag (34) and a first connecting rod (35); the threaded rod (31) is vertically arranged in the hollow chamber, and one end of the threaded rod (31) is fixedly connected to the bottom of the hollow chamber, the nut (32) is sleeved on the threaded rod (31), the elastic bag (34) is arranged at the bottom of the hollow chamber, and the elastic bag (34) is sleeved and connected to the threaded rod (31); the first connecting rod (35) is arranged at an angle to the threaded rod (31), one end of the first connecting rod (35) is connected to the elastic bag (34), the other end of the first connecting rod (35) is penetrated through the cover plate body (1), and the other end of the first connecting rod (35) is plugged into the well wall; A monitoring unit is arranged on a side of the cover plate body (1) close to the well wall, and the monitoring unit is used to monitor the storage well (10) in real time; as well as A control unit is electrically connected to the pushing member (2) and the monitoring unit respectively.

2. A foldable neutron source shielding cover as claimed in claim 1, characterized in that: A pressure plate (33) is also provided between the nut (32) and the elastic bag (34), and the pressure plate (33) is sleeved on the threaded rod (31).

3. A foldable neutron source shielding cover as claimed in claim 2, characterized in that: It also comprises an anti-loosening unit (4), wherein the anti-loosening unit (4) is arranged between the well edge of the storage well (10) and the cover plate body (1).

4. A foldable neutron source shielding cover as claimed in claim 3, characterized in that: The side wall of the cover body (1) is provided with two insertion holes, the inner wall of the cover body (1) is provided with a pressing block (11), and the anti-loosening unit (4) comprises: Two second connecting rods (41), one ends of the two second connecting rods (41) are rotatably connected to each other, and the other ends of the second connecting rods (41) are penetrated through the well wall, and the second connecting rods (41) are rotatably connected to the well wall; Two transmission rods (42) are arranged one by one corresponding to the two second connecting rods (41), the transmission rods (42) are vertically penetrated through the well wall, one end of the transmission rod (42) is rotatably connected to the other end of the second connecting rod (41), and the other end of the transmission rod (42) is inserted into the insertion hole; The spring (43) is arranged horizontally, and two ends of the spring (43) are respectively connected to the rod bodies of the two second connecting rods (41).

5. The foldable neutron source shielding cover as claimed in claim 4, characterized in that: The well wall comprises a supporting portion (101) and a limiting portion (102); the limiting portion (102) is arranged on the supporting portion (101), and the limiting portion (102) is an annular protrusion.

6. The foldable neutron source shielding cover as claimed in claim 5, characterized in that: It also comprises a sealing ring, which is arranged between the cover plate body (1) and the well wall.

7. The foldable neutron source shielding cover according to claim 6, characterized in that: There are two pushing members (2).

8. The foldable neutron source shielding cover according to claim 7, characterized in that: Boron-containing polyethylene is coated inside the cover plate body (1).

9. The foldable neutron source shielding cover according to claim 8, characterized in that: It also includes a mobile device end, and the mobile device end is connected to the control unit in real time by electrical signals.

10. The foldable neutron source shielding cover according to claim 9, characterized in that: A handle is provided on the outer end surface of the cover plate body (1).

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