Nuclear waste transportation device

Abstract

The utility model discloses a nuclear waste transportation device, which belongs to the technical field of radioactive nuclear waste transportation and comprises an outer box body and a shielding box body arranged in the outer box body, and the shielding box body is attached to the outer box body and used for shielding radioactivity of a nuclear waste storage barrel. The shielding box body comprises a cover body and a shielding box body, and a locking device is arranged at the top end of the cover body and used for locking and connecting the cover body and the shielding box body. According to the nuclear waste transportation device, the shielding box body structure matched with the common YA-II steel box in size is arranged in the common YA-II steel box, the shielding box body can be loaded with ten waste bins with the maximum size of 400 L, then the requirement for the radiation level in related standards can be met, and the safety of the waste bins in the shielding box body in the transportation process can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of radioactive nuclear waste transportation, in particular to a nuclear waste transportation device. Background Art

[0002] At present, the structural design and dimensions of steel boxes for transporting low- and medium-level radioactive waste are all carried out in accordance with the EJ1076-2014 standard. Among them, the specified dimensions of the YA-II steel box are 6058mm * 2438mm * 2438mm. Domestic nuclear facilities use YA-II steel boxes that follow this standard for packaging, transporting, and disposing of low- and medium-level radioactive waste.

[0003] At present, most domestic low- and medium-level radioactive waste is treated by cement solidification, and solid waste in the form of 400L steel drums is formed, which is then loaded into solid waste transportation containers for transfer. With the development of nuclear energy technology, the radiation dose on the surface of waste drums has gradually increased, and the number of radioactive waste drums exceeding the standard has increased year by year. If ordinary steel boxes of the EJ1076-2014 standard are still used, the surface dose rate of the steel boxes will exceed the national standard requirements, which will have an impact on personnel and the environment.

[0004] Currently, to solve the above problems, the R & D directions of most manufacturers focus on designing more novel steel boxes to replace the existing YA-II steel boxes.

[0005] For example, Chinese Patent CN 219457163 U discloses a waste storage device for nuclear power plants, which blocks nuclear radiation by designing a lead shielding layer; Chinese Patent CN 208037218 U discloses a nuclear waste transportation container, specifically discloses that the interior of the container has a waste storage container, the waste storage container is provided with a radiation-proof filling layer, the top of the waste storage container has a top opening, and the top of the waste storage container is higher than the upper surface of the container or flush with the upper surface of the container. The cover is movably provided on the top of the container, the cover has a top plate and a first side wall extending downward from the top plate. In the closed state where the cover is closed on the container, the first side wall abuts against the container, and at least part of the cover is provided with a radiation-proof filling layer. It can be seen that it is also an overall improvement to the steel box.

[0006] The disadvantage of the above improvement is that it completely abandons the existing YA-II steel box, and the original steel box needs to be scrapped and replaced with a new one. However, the research, design, and test cycle of the new steel box is long, and various comprehensive requirements need to be considered, and the existing problems cannot be solved immediately, and it causes waste of resources. Content of the Utility Model

[0007] The technical problem to be solved by the present utility model is how to directly use a common YA-II steel box while maintaining the unchanged transportation standard technical requirements of a 400L waste bucket, keep the original design structure, hoisting and transportation operation mode of the YA-II steel box unchanged, and at the same time ensure that the steel box meets the usage specifications.

[0008] To solve the above technical problems, the present utility model adopts the following technical solutions: A nuclear waste transportation device includes an outer box body and a shielding box body disposed therein. The shielding box body is disposed in contact with the outer box body and is used to shield the radioactivity of the nuclear waste storage bucket. The shielding box body includes a cover body and a shielding box body. A locking device is disposed at the top end of the cover body for locking and connecting the cover body and the shielding box body. The shielding box body is of a cuboid structure and includes a rectangular bottom plate and two long side plates and two short side plates oppositely disposed and fixedly connected to the bottom plate. At both ends of the two long side plates, ear structures are oppositely disposed. Four locking devices are disposed on the upper surface of the cover body, and each locking device corresponds to the ear structure on the shielding box body.

[0009] Further, the ear structure includes a connecting plate fixedly connected to the long side plate and an ear protruding from the upper surface of the long plate. The connecting plate and the ear are integrally formed, and the central part of the ear is of a hollow shape.

[0010] Further, the locking device includes a T-shaped lock rod and a blocking block. The T-shaped lock rod includes a top rod and a pressing rod. One end of the top rod is inserted into the center of the ear after the cover body and the shielding box body are closed and can rotate in the center of the ear.

[0011] Further, after the cover body and the shielding box body are closed, the blocking block and the ear are respectively located on both sides of the T-shaped lock rod, and the distance from the blocking block to the pressing rod of the T-shaped lock rod is less than or equal to the distance from the pressing rod to the ear.

[0012] Preferably, the length of the pressing rod is greater than the length of the top rod.

[0013] Further, two pairs of lifting rings are oppositely disposed on the upper surface of the cover body for lifting the cover body.

[0014] Preferably, the positions of the blocking block and the lifting ring coincide.

[0015] Further, a pair of ear structures are oppositely disposed on the upper surfaces of the two short side plates of the shielding box body. Beneficial effects

[0016] (1) In this application, a shielding box body structure that fits its size is arranged inside a common YA-II steel box. The shielding box body can load 10 waste bins with a maximum volume of 400L (the surface dose rate is between 2 - 26 mSv / h) and meet the radiation level requirements in the "Regulations for the Safe Transport of Radioactive Substances" (GB 11806 - 2019), and can ensure the safety of the waste bins inside the shielding box body during transportation.

[0017] (2) By adopting a locking device on the cover body of the shielding box body, it can effectively prevent the up-and-down and left-and-right movement of the shielding box cover body and the box body caused by road bumps during transportation, thereby preventing its displacement.

[0018] (3) By cleverly utilizing the lifting lug structure on the shielding box body and the lifting ring on the cover body, the locking device is made simpler, the cost is reduced, and at the same time, the purpose of locking the cover body and the shielding box body is achieved.

[0019] (4) By arranging a pair of lifting lug structures on the two short side plates of the shielding box body, it can not only play the role of connecting with the lifting hook, but also play a positioning role during the process of covering the cover body onto the shielding box body, and during transportation, it can also prevent the situation of front-back misalignment between the cover body and the shielding box body caused by sudden start and stop. Brief Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the shielding box body of the present utility model.

[0021] Figure 2 It is a schematic structural diagram of the shielding box body of the present utility model.

[0022] Figure 3 It is a schematic structural diagram of one preferred embodiment of the locking device of the present utility model.

[0023] Figure 4 It is a schematic structural diagram of another preferred embodiment of the locking device of the present utility model.

[0024] Figure 5 It is a top view of the present utility model after loading.

[0025] Figure 6 It is a schematic structural diagram of one embodiment of the present utility model.

[0026] Wherein 1 - cover body, 2 - shielding box body, 21 - long side plate, 22 - short side plate, 23 - bottom plate, 3 - lifting lug structure, 31 - connecting plate, 32 - lifting lug, 4 - locking device, 41 - ejector rod, 42 - pressure rod, 43 - partition block, 5 - lifting ring, 6 - outer box body. Detailed Description of the Invention

[0027] To enhance the understanding of the present utility model, the present utility model will be described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present utility model and do not limit the protection scope of the present utility model.

[0028] As Figure 1 shown, there is a shielding box body inside a nuclear waste transportation device, which is placed inside the outer box body of the nuclear waste transportation device and is arranged in contact with the outer box body, aiming to shield the radioactivity of the nuclear waste storage barrel. The shielding box body is of a cuboid structure, and the main material is Q235B type steel plate, including a top cover 1 that can be removed and a lower shielding box body 2. A locking device 4 is arranged on the upper surface of the cover 1 to lock the cover 1 and the shielding box body 2, preventing accidental situations such as tilting and dislocation during transportation.

[0029] The shielding box body 2 includes a bottom rectangular bottom plate 23 and two long side plates 21 and two short side plates 22 that are oppositely arranged and fixedly connected to the bottom plate 23. The side plates are connected by full penetration welding with beveled edges, and the welded frame is fixed to the bottom plate by full penetration welding with beveled edges. To facilitate the loading and unloading of a 400L nuclear waste placement barrel, the bottom of the shielding box body 2 is flat without steps.

[0030] As Figure 2 shown, lifting lug structures 3 are respectively oppositely arranged at both ends of the two long side plates 21. The lifting lug structure 3 includes a connecting plate 31 fixedly welded to the long side plate 21 and a lifting lug 32 protruding from the upper surface of the long side plate 21. The connecting plate 31 and the lifting lug 32 are integrally formed, and the central part of the lifting lug 32 is hollow, such as circular or polygonal, etc., for connecting with the hook of the lifting device. A single lifting lug can bear a weight of 10 tons.

[0031] The locking device 4 includes a T-shaped locking rod and a blocking block 43. The T-shaped locking rod includes a top rod 41 and a pressing rod 42. The length of the pressing rod 42 is preferably greater than the length of the top rod 41, which is more suitable for long-distance operation. One end of the top rod 41 is inserted into the center of the lifting lug 32 after the cover 1 and the shielding box body 2 are closed and can rotate in the center of the lifting lug 32. Therefore, the shape of the top rod 41 needs to match the shape of the lifting lug or the size is slightly smaller than the hollow part of the lifting lug. Thus, it can be seen that the lifting lug 32 is not only used to connect with the hook of the lifting device but also needs to be connected and cooperated with the locking device 4 to lock the cover 1 and the shielding box body 2, preventing the up and down separation of the cover and the shielding box body due to bumps on the transportation road. Therefore, it is preferably to set 4 locking devices on the upper end surface of the cover 1, and each locking device corresponds to a lifting lug structure 3.

[0032] The locking device 4 is also provided with a blocking block 43, which is arranged on the other side of the T-shaped locking rod relative to the lifting lug 32 with the pressing rod 42 as the line. As Figure 3As shown, the partition block 43 can be set at the connection of the ejector rod 41 and the pressure rod 42, or can be set anywhere in the space formed by the ejector rod 41 and the pressure rod 42, as long as the distance from the partition block 43 to the T-shaped lock rod pressure rod 42 is less than or equal to the distance from the pressure rod 42 to the lifting lug 32. The purpose of this design is to prevent the left and right sliding of the T-shaped lock rod caused by shaking during transportation, thereby preventing the horizontal relative sliding of the cover body and the shielding box body.

[0033] It can be seen that by adopting the locking device 4, the up and down and left and right movements of the shielding box cover body and the box body caused by road bumps during transportation can be effectively prevented, thereby preventing their displacement.

[0034] As Figure 1 and Figure 4 shown, two pairs of lifting rings 5 are oppositely arranged on the upper surface of the cover body 1 for lifting the cover body 1. The material of the lifting ring 5 is Q235B steel, and it is fixed by full welding connection. When the position of the partition block 43 coincides with the position of the lifting ring 5, the lifting ring 5 simultaneously acts as the partition block 43, which can reduce costs.

[0035] On the upper surfaces of the two short side plates 22 of the shielding box body 2, a pair of lifting lug structures 3 are oppositely arranged. This lifting lug structure 3 has the same structure as the lifting lug structure 3 located on the long side 21, but it can not only play the role of connecting with the hook, but also play a positioning role during the process of covering the cover body 1 on the shielding box body 2. At the same time, during transportation, the short side plate 22 will be placed in the direction of the vehicle head. Therefore, the lifting lug structure 3 here can also prevent the situation of front and rear misalignment of the cover body 1 and the shielding box body 2 caused by sudden start and stop.

[0036] As Figure 6 shown, as a preferred embodiment of the present application, the shielding box body includes a cover body 1 and a shielding box body 2. Four locking devices 4 and four lifting rings 5 are arranged on the upper surface of the cover body 1. At this time, the lifting ring 5 simultaneously acts as the partition block 43. Lifting lug structures 3 are respectively arranged at both ends of the two long side plates 21 of the shielding box body 2, and lifting lug structures 3 are respectively oppositely arranged on the two short side plates 22.

[0037] During use, first place the shielding box body into the outer box body of the transportation device, use a crane to place the transportation buckets loaded with nuclear waste one by one. After placing them, the crane closes the cover body 1. The operator remotely controls the ejector rod of the T-shaped lock rod to insert into the lifting lug, then fits the pressure rod on the surface of the cover body, and finally closes the outer box body. At this time, the loading of the transportation device is completed. The weight of the shielding box body is about 3 tons, and its size can load 10 nuclear waste placement buckets of 400L. The placement of the loaded buckets is as Figure 5 shown.

[0038] The embodiments disclosed in the present utility model are preferred embodiments, but are not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present utility model based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present utility model, they are within the protection scope of the present utility model.

Claims

1. A nuclear waste transportation device, characterized in that, It includes an outer box body (6) and a shielding box body placed therein. The shielding box body is arranged in contact with the outer box body (6) and is used to shield the radioactivity of the nuclear waste storage barrel. The shielding box body includes a cover body (1) and a shielding box (2). A locking device (4) is provided at the top end of the cover body (1) for locking and connecting the cover body (1) and the shielding box (2). The shielding box (2) is of a cuboid structure and includes a rectangular bottom plate (23) and two long side plates (21) and two short side plates (22) which are fixedly connected to the bottom plate (23) and are arranged oppositely. At both ends of the two long side plates (21), lifting lug structures (3) are arranged oppositely. Four locking devices (4) are provided on the upper surface of the cover body (1), and each locking device (4) corresponds to the lifting lug structure (3) on the shielding box (2).

2. The nuclear waste transportation device according to claim 1, characterized in that, The lifting lug structure (3) includes a connecting plate (31) fixedly connected to the long side plate (21) and a lifting lug (32) protruding from the upper surface of the long side plate (21). The connecting plate (31) and the lifting lug (32) are integrally formed, and the central part of the lifting lug (32) is hollow in shape.

3. The nuclear waste transportation device according to claim 2, characterized in that, The locking device (4) includes a T-shaped locking rod and a blocking block (43). The T-shaped locking rod includes a top rod (41) and a pressing rod (42). One end of the top rod (41) is inserted into the center of the lifting lug (32) after the cover body (1) and the shielding box (2) are closed, and can rotate in the center of the lifting lug (32).

4. The nuclear waste transportation device according to claim 3, characterized in that, After the cover body (1) and the shielding box (2) are closed, the blocking block (43) and the lifting lug (32) are respectively located on both sides of the T-shaped locking rod, and the distance from the blocking block (43) to the pressing rod (42) of the T-shaped locking rod is less than or equal to the distance from the pressing rod (42) to the lifting lug (32).

5. The nuclear waste transportation device according to claim 4, characterized in that, The length of the pressing rod (42) is greater than the length of the top rod (41).

6. The nuclear waste transportation device according to claim 3, characterized in that, Two pairs of lifting rings (5) are arranged oppositely on the upper surface of the cover body (1) for lifting the cover body.

7. The nuclear waste transportation device according to claim 6, characterized in that, The positions of the blocking block (43) and the lifting rings (5) coincide.

8. The nuclear waste transportation device according to claim 2, characterized in that, On the upper surfaces of the two short side plates (22) of the shielding box (2), a pair of lifting lug structures (3) are arranged oppositely.

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