Shielding container with cover taking and sealing functions

Abstract

The invention relates to the technical field of shielding containers, in particular to a shielding container with a cover taking and sealing function. The shielding container comprises a shielding container body and a shielding container cover plate, the shielding container body comprises an outer steel plate, an inner steel plate and lead alloy, the inner steel plate is arranged in the outer steel plate, and the lead alloy is arranged between the outer steel plate and the inner steel plate; the shielding container cover plate is provided with a sleeve part and a gripper part, and the sleeve part penetrates through the whole shielding container cover plate and corresponds to a barrel cover bolt of the 400L metal barrel in position; the gripper component is arranged at the center of the shielding container cover plate, penetrates through the whole shielding container cover plate and is used for locking the 400L metal barrel. Through the design of the shielding container cover plate, the effect that a worker carries out cover taking and sealing operation on a radioactive waste barrel in a shielding container under shielding protection is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of shielding containers, and particularly relates to a shielding container with a function of removing and covering a lid. Background Art

[0002] The radioactive process waste generated by nuclear power plants is usually packaged in 400L metal barrels. In the prior art, a special lifting tool must be used during lifting, and the entire metal barrel is lifted out with the lifting ring of the barrel lid of the metal barrel as the lifting point. Therefore, the metal barrel containing radioactive waste must be capped before hoisting. For 400L radioactive waste barrels produced by a cement solidification line or other standard production lines, remote removal and capping operations can be realized through an automatic removal and capping device; however, in actual applications, there will always be occasions where remote operation is not possible (such as 400L radioactive waste barrels produced by non-cement solidification lines or special occasions where a remote power source cannot be provided). At this time, on-site capping can only be carried out manually. In this process, the staff will inevitably approach the radioactive waste, resulting in a significant increase in the radiation dose and radiation risk of the staff. Summary of the Invention

[0003] The purpose of the present invention is to provide a shielding container with a function of removing and covering a lid, which is used to enable workers to perform manual on-site removal and capping operations on 400L radioactive waste barrels under good shielding protection in scenarios where remote means cannot be applied to operate 400L radioactive waste barrels.

[0004] Technical Solution of the Present Invention:

[0005] The present invention proposes a shielding container with a function of removing and covering a lid. The shielding container includes a shielding container body and a shielding container cover plate. The shielding container body includes an outer steel plate, an inner steel plate, and a lead alloy. The inner steel plate is provided inside the outer steel plate, and the lead alloy is provided between the outer steel plate and the inner steel plate; a sleeve component and a gripper component are provided on the shielding container cover plate. The sleeve component penetrates through the entire shielding container cover plate and corresponds to the bolt position of the lid of the 400L metal barrel; the gripper component is provided at the center position of the shielding container cover plate and penetrates through the entire shielding container cover plate for locking the 400L metal barrel.

[0006] In some embodiments, the sleeve component includes an upper sleeve and a lower sleeve. The upper sleeve is located on the upper surface of the shielding container cover plate, and the lower sleeve is located on the lower surface of the shielding container cover plate. The upper sleeve operates the lower sleeve through a wrench to engage with the bolts of the lid of the 400L metal barrel.

[0007] In some embodiments, the grapple component includes a barrel cover grapple, an operating rod, and a rotating arm. The operating rod passes through the entire shielding container cover plate. The barrel cover grapple is installed at the lower end of the operating rod, and the rotating arm is installed at the upper end of the operating rod. The barrel cover grapple is located on the lower surface of the shielding container cover plate and has a locking function. The rotating arm is used to control the clamping and releasing of the barrel cover grapple at the upper end of the shielding container cover plate.

[0008] In some embodiments, the shielding container body is also provided with a lining. The lining is arranged inside the inner steel plate and is made of polytetrafluoroethylene A.

[0009] In some embodiments, the shielding container body is also provided with a lifting lug A, a forklift hole A, and a clamping groove. The lifting lug A is arranged at the middle position of the outer wall of the outer steel plate. The forklift hole A is arranged at the bottom of the shielding container body. The clamping groove is arranged at the top of the outer wall of the outer steel plate.

[0010] In some embodiments, the lead alloy is designed with a 90mmPb lead equivalent as a whole, and the lead alloy in the central area of the shielding container is designed with a 120mmPb lead equivalent.

[0011] In some embodiments, the dimensions of the shielding container body are designed with reference to the 400L metal barrel used in the power plant and the interfaces of the relevant workshops for power plant waste treatment.

[0012] In some embodiments, a lifting lug B is provided on the outer side of the upper end of the shielding container cover plate, and a forklift hole B is provided on the side wall of the shielding container cover plate.

[0013] In some embodiments, a positioning pin is provided at the outer side position of the shielding container cover plate, and a limiting block is provided at the central position of the shielding container cover plate. The limiting block can indicate the claw state of the barrel cover grapple.

[0014] In some embodiments, a plug is provided on the outer wall of the shielding container cover plate, and the plug corresponds to the clamping groove.

[0015] Implementing the present invention has the following beneficial effects:

[0016] Through the design of the shielding container cover plate of the present invention, the effect that the staff can perform the operations of removing and covering the radioactive waste barrel in the shielding container under shielding protection is achieved, specifically including:

[0017] 1. The present invention is generally applicable to the occasion of transporting waste bins with a contact dose rate ranging from 0.1 mSv / h to 2000 mSv / h. The overall design of the present invention adopts a 90 mm Pb equivalent shielding layer, which can shield a radioactive waste bin with a contact dose rate of 2000 mSv / h to below 2 mSv / h. At the same time, the central area of the shielding layer of the shielding container is locally thickened to 120 mm Pb equivalent, which further increases the protection effect of the device and has a good protection ability for waste bins with higher radioactivity. In actual tests, for a waste bin with a contact dose rate of 2000 mSv / h, the dose rate can be reduced to below 0.1 mSv / h after being shielded by this device, and if necessary, lead sheets can be further mounted outside the device to enhance the protection ability.

[0018] 2. The present invention is provided with lifting lugs and forklift holes, and two loading methods of forklift or crane can be selected. It is preferably recommended to use a crane for operation in the plant. In a plant without a crane, a forklift with a specification of 8 tons or more can be used to operate this device.

[0019] 3. When designing the present invention, the working requirements of various units are considered at the same time. Shielding container covers adapted to different waste bins are respectively designed, and the staff can select them according to actual needs, which has good versatility. Even in workplaces where manual capping is not considered, this device can also be used as a general radioactive waste shielding and transporting container. Description of the Drawings

[0020] Figure 1 It is the front view of the shielding container body structure of a shielding container with capping and uncapping functions proposed in an embodiment of the present invention;

[0021] Figure 2 It is the top view of the shielding container body structure of a shielding container with capping and uncapping functions proposed in an embodiment of the present invention;

[0022] Figure 3 It is the front view of the shielding container cover structure of a shielding container with capping and uncapping functions proposed in an embodiment of the present invention;

[0023] Figure 4 It is the top view of the shielding container cover structure of a shielding container with capping and uncapping functions proposed in an embodiment of the present invention;

[0024] Reference Numerals: 1. Forklift Hole B; 2. Bucket Cover Gripper; 3. Lower Part of Sleeve; 4. Operating Rod; 5. Upper Part of Sleeve; 6. Lifting Lug B; 7. Positioning Pin; 8. Limiting Block; 9. Rotating Arm; 10. Plug-in; 11. Outer Steel Plate; 12. Inner Steel Plate; 13. Lead Alloy; 14. Lining; 15. Forklift Hole A; 16. Lifting Lug A; 17. Card Slot. Detailed Embodiment

[0025] AsFigures 1 to 4 As shown in Figures 1 to 4 , the present invention provides a shielding container with a function of removing and covering the lid. The shielding container includes a shielding container body, which includes an outer steel plate 11, an inner steel plate 12 and a lead alloy 13. The inner steel plate 12 is provided inside the outer steel plate 11, and the lead alloy 13 is provided between the outer steel plate 11 and the inner steel plate 12; the device also includes a shielding container cover plate, on which a sleeve component and a gripper component are provided. The sleeve component penetrates through the entire shielding container cover plate and corresponds to the bolt position of the lid of the 400L metal barrel; the gripper component is provided at the center position of the shielding container cover plate and penetrates through the entire shielding container cover plate for locking the 400L metal barrel. Through the design of the shielding container cover plate, the present invention realizes the effect that the staff can perform the operations of removing and covering the lid of the radioactive waste barrel in the shielding container under shielding protection.

[0026] It should be noted that the size of the shielding container body is designed with reference to the 400L metal barrel used in the power plant and the interface of the relevant plant for waste treatment in the power plant.

[0027] In some embodiments, the sleeve component includes an upper sleeve 5 and a lower sleeve 3. The upper sleeve 5 is located on the upper surface of the shielding container cover plate, and the lower sleeve 3 is located on the lower surface of the shielding container cover plate. The upper sleeve 5 operates the lower sleeve 3 through a wrench to engage with the bolts of the lid of the corresponding 400L metal barrel. The gripper component includes a lid gripper 2, an operating rod 4 and a rotating arm 9. The operating rod 4 penetrates through the entire shielding container cover plate. The lid gripper 2 is installed at the lower end of the operating rod 4, and the rotating arm 9 is installed at the upper end of the operating rod 4; the lid gripper 2 is located on the lower surface of the shielding container cover plate and has a locking function; by using the rotating arm 9, the lid gripper 2 can be controlled to grip and release outside the shielding container cover plate. By providing the sleeve component and the gripper component, the present invention can lock and release the 400L metal barrel outside the shielding container for the staff to operate the 400L metal barrel to cover the lid under shielding protection.

[0028] In some embodiments, the shielding container body is further provided with a lining 14. The lining 14 is arranged inside the inner steel plate, and the lining 14 is made of polytetrafluoroethylene. The lining 14 can assist the 400L metal barrel to be accurately positioned at the center of the shielding container and buffer the shaking and bumping during transportation.

[0029] In some embodiments, the shielding container body is further provided with a lifting lug A16, a forklift hole A15 and a clamping groove 17. The lifting lug A16 is arranged at the middle position of the outer wall of the outer steel plate 11, the forklift hole A15 is arranged at the bottom of the shielding container body, and the clamping groove 17 is arranged at the top of the outer wall of the outer steel plate 11. A lifting lug B6 is also arranged at the outer upper position of the shielding container cover plate, and a forklift hole B1 is arranged on the side wall of the shielding container cover plate. The present invention is designed with both lifting lugs and forklift holes, and two loading methods of forklift or crane can be selected. The present invention preferably recommends using a crane for operation in the plant. In a plant without a crane, a forklift with a specification of 8 tons or more can be used for operation.

[0030] In some embodiments, a positioning pin 7 is provided at the outer side of the shielding container cover plate, and a limiting block 8 is provided at the center of the shielding container cover plate. The limiting block 8 can indicate the claw state of the bucket cover gripper 2. A plug-in 10 is provided at the outer side of the shielding container cover plate, and the plug-in 10 corresponds to the card slot 17. Only when the plug-in 10 and the card slot 17 are aligned can the shielding container cover plate be placed on the shielding container body.

[0031] In some embodiments, the lead alloy 13 is designed with a 90 mm Pb lead equivalent as a whole, and the central area of the shielding container is designed with a 120 mm Pb lead equivalent. The central area of the container is locally thickened to 120 mm Pb lead equivalent to enhance the protection against radioactivity. The local thickening method is mainly considered to reduce the total weight of the shielding container, and the local thickening is sufficient to meet the protection requirements. The present invention adopts a 90 mm Pb lead equivalent shielding layer design as a whole. According to theoretical calculation, a shielding layer of 90 mm Pb is sufficient to shield a radioactive waste bucket with a contact dose rate of 2000 mSv / h to below 2 mSv / h. At the same time, the central area of the shielding layer of the shielding container is locally thickened to 120 mm Pb lead equivalent, which can further increase the protection effect of the device and also has a good protection ability for higher radioactive waste buckets. In actual tests, for a waste bucket with a contact dose rate of 2000 mSv / h, the dose rate can be reduced to below 0.1 mSv / h after being shielded by this device, and lead sheets can be further mounted outside the device to enhance the protection ability when necessary.

[0032] In the design of the present invention, the working requirements of multiple units are considered at the same time, and shielding container cover plates adapted to different waste buckets are designed respectively, and the staff can select them according to actual needs. In workplaces where manual capping is not considered, this device can also be used as a general radioactive waste shielding transfer container.

[0033] As Figures 1 to 4 shown, the specific usage method of the present invention is as follows:

[0034] S1: Load the 400L metal bucket into the shielding container.

[0035] S1.1: Grab the shielding container cover plate by a crane, and adjust the angle between the shielding container cover plate and the 400L metal bucket to align the sleeve component with the bucket cover bolts of the 400L metal bucket.

[0036] S1.2: Lower the shielding container cover plate until the sleeve component engages with the bucket cover bolts of the 400L metal bucket.

[0037] S1.3: Control the bucket cover gripper 2 to tightly grip the bucket cover of the 400L metal bucket.

[0038] S1.4: The lifting sling lifts the metal barrel cover and the 400L metal barrel together and drops them into the shielding container. At this point, the relative positions of the 400L metal barrel, the container, the container cover plate, and the sleeve component are fixed. Subsequently, each time the shielding container cover plate falls into the shielding container along the card slot 17, the sleeve component and the 400L barrel bolts are automatically aligned and engaged.

[0039] S2: Remove the cover of the 400L metal barrel.

[0040] S2.1: Use a ratchet wrench to loosen the bolts of the 400L metal barrel cover through the sleeve component.

[0041] S2.2: Adjust the gripper component to the gripping state and grip the cover of the 400L metal barrel.

[0042] S2.3: Use a crane or forklift to lift the shielding container cover plate, lift the shielding container cover plate with the gripped 400L metal barrel cover, and place it aside for standby. At this time, the 400L barrel in the container is in an open state, and radioactive waste can be put into the barrel.

[0043] S3: Seal the cover of the 400L metal barrel.

[0044] S3.1: After putting waste into the 400L metal barrel, re-lift the shielding container cover plate with the gripped 400L metal barrel cover above the shielding container body, and align the card slot 17 of the shielding container and the plug-in 10 of the shielding container cover plate with each other.

[0045] S3.2: Use a crane or forklift to lower the shielding container cover plate onto the shielding container body. Since the relative positions of the metal barrel and the barrel cover remain unchanged, the bolts of the 400L metal barrel cover will enter the bolt holes of the 400L metal barrel.

[0046] S3.3: Use a ratchet wrench to tighten the bolts of the 400L metal barrel cover through the sleeve component.

[0047] S3.4: Operate the barrel cover gripper 2 to release the 400L metal barrel cover. Thus, the capping operation of the 400L metal barrel is completed.

[0048] S3.5: The operator can transfer the shielding container to other places, use the crane in the workshop to lift the shielding container cover plate, and then take out the 400L metal barrel.

[0049] The above has described the embodiments of the present invention in detail. The present invention is not limited to the above examples. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the gist of the present invention.

Claims

1. A shielding container with a cover removal function, characterized in that: The shielding container includes a shielding container body and a shielding container cover, the shielding container body includes an outer steel plate, an inner steel plate and a lead alloy, the inner steel plate is arranged inside the outer steel plate, and lead alloy is arranged between the outer steel plate and the inner steel plate; the shielding container cover is provided with a sleeve component and a gripper component, the sleeve component passes through the entire shielding container cover and corresponds to the position of the barrel cover bolts of the 400L metal barrel; the gripper component is arranged at the center of the shielding container cover, passes through the entire shielding container cover, and is used to lock the 400L metal barrel.

2. A shielding container with a cover removal function according to claim 1, characterized in that: The sleeve component includes an upper sleeve portion and a lower sleeve portion, wherein the upper sleeve portion is located on the upper surface of the shielding container cover, and the lower sleeve portion is located on the lower surface of the shielding container cover. The upper sleeve portion is operated by a wrench to manipulate the lower sleeve portion to engage with the bolts of the 400L metal barrel cover.

3. The shielding container with cover removal function according to claim 1, characterized in that: The gripper component includes a barrel cover gripper, an operating rod and a rotating arm. The operating rod runs through the entire shielding container cover. The barrel cover gripper is installed at the lower end of the operating rod, and the rotating arm is installed at the upper end of the operating rod. The barrel cover gripper is located on the lower surface of the shielding container cover and has a locking function. The barrel cover gripper is controlled to be tightened and loosened by using the rotating arm at the upper end of the shielding container cover.

4. The shielding container with cover removal function according to claim 1, characterized in that: The shielding container body is also provided with an inner lining, which is arranged inside the inner steel plate and is made of A polytetrafluoroethylene material.

5. The shielding container with cover removal function according to claim 1, characterized in that: The shielding container body is also provided with a lifting lug A, a forklift hole A and a slot. The lifting lug A is arranged in the middle of the outer wall of the outer steel plate, the forklift hole A is arranged at the bottom of the shielding container body, and the slot is arranged at the top of the outer wall of the outer steel plate.

6. The shielding container with cover removal function according to claim 1, characterized in that: The lead alloy as a whole is designed with 90 mmPb lead equivalent, and the lead alloy in the central area of ​​the shielding container is designed with 120 mmPb lead equivalent.

7. The shielding container with cover removal function according to claim 1, characterized in that: The dimensions of the shielding container body are designed with reference to the interface of the 400L metal barrel used in the power plant and the related plant buildings for waste treatment in the power plant.

8. The shielding container with cover removal function according to claim 1, characterized in that: A lifting lug B is provided at the outer side of the upper end of the shielding container cover, and a forklift hole B is provided on the side wall of the shielding container cover.

9. The shielding container with cover removal function according to claim 3, characterized in that: A positioning pin is provided at the outer side of the shielding container cover, and a limit block is provided at the center of the shielding container cover, and the limit block can indicate the gripping state of the barrel cover gripper.

10. The shielding container with cover removal function according to claim 1, characterized in that: An insert is provided on the outer wall of the shielding container cover, and the insert corresponds to the card slot.

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