Container lid fixed to a radioactive material transport container, radioactive transport container

Abstract

The application discloses a container cover fixed to a radioactive article transport container, which comprises a connecting part for fixing the container cover to the transport container. The container cover further comprises a shielding part arranged on one side of the connecting part close to the center of the transport container, and a gas charging part for providing gas for the transport container, which is arranged between the connecting part and the shielding part and is in abutting assembly with the shielding part to form a cylindrical surface or a conical surface, the cylindrical surface or the conical surface comprising a first side surface arranged on the shielding part and a second side surface arranged on the gas charging part. The first side surface and the second side surface form the cylindrical surface or the conical surface to seal the container barrel. By independently arranging the gas charging part and the shielding part, the shielding function and the gas charging function are separated, and the shielding effect and the structural strength of the shielding material are increased.

Description

Technical Field

[0001] This invention relates to the field of nuclear industry, and more specifically, to a transport container for radioactive materials. Background Technology

[0002] When radioactive materials are transported, they may pass through areas where the public is active, and it is necessary to ensure that the radiation dose received by the public meets regulatory requirements under normal conditions and pre-set events. As a key piece of equipment for transporting radioactive materials, transport containers typically have high safety requirements and strong damage resistance.

[0003] Patent CN117219309A discloses a PuO2 powder transport container, relating to the field of radioactive material transport equipment technology. This transport container is cylindrical in shape, comprising an outer container and an inner container, with the inner container disposed inside the outer container. The outer container includes an outer container body and a top cover, with a flange at the top of the outer container body, and the top cover connected to the outer container body via the flange. The outer container body includes an outer shell and an inner shell, with the space between the inner and outer shells and the interior of the top cover filled with heat-insulating material. The inner container includes an inner cylinder, with an inner cylinder flange at the top of the inner cylinder body, an inner cover located in the central area of ​​the upper end of the inner cylinder flange, and an outer cover located above the inner cover. The inner cylinder body includes an outer sleeve and an inner sleeve, with the space between the outer and inner sleeves and the interior of the inner cover filled with shielding material. This patent discloses the shielding structure of a radioactive material transport container, but it does not address how to ensure the strength and shielding effect of the shielding layer when the container is filled with gas.

[0004] In view of the above technical problems, this invention is hereby introduced. Summary of the Invention

[0005] The main objective of this invention is to provide a radioactive material transport container with good shielding performance.

[0006] To achieve the above objectives, this invention discloses a container cap fixed to a radioactive material transport container. The container cap includes a connecting portion that secures the cap to the transport container. The container cap further includes: a shielding portion disposed on the side of the connecting portion near the center of the transport container; and an inflation portion that supplies gas to the transport container. The inflation portion is disposed between the connecting portion and the shielding portion, and is fitted adjacently to the shielding portion to form a cylindrical or conical surface. The cylindrical or conical surface includes a first side surface and a second side surface. The first side surface is disposed on the shielding portion, and the second side surface is disposed on the inflation portion. The first and second side surfaces form a cylindrical or conical surface to seal the container body. The shielding layer of the container body and the container cap effectively shields against radioactivity and ensures the sealing of the inner cavity of the container.

[0007] The following are further optimizations of the above solution by the present invention:

[0008] Furthermore, the inflation section includes an inflation block and an inflation port cover, the inflation port cover covering the inflation block.

[0009] Furthermore, the inflatable block includes a groove, a second side surface, and an inflation channel. The inflation channel includes an air inlet and an air outlet. The air inlet is located at the bottom of the groove, and the air outlet is located on the second side surface.

[0010] Furthermore, the cross-section of the air hole cover along the axis of the air hole cover is a T-shaped surface. The air hole cover includes a cover part and an extension part. The cover part is fixedly connected to the air block; the extension part is engaged with the groove.

[0011] Furthermore, the extension has an annular groove to accommodate the sealing ring.

[0012] Furthermore, the inflatable block also includes an air guide groove, which is located on the second side.

[0013] Furthermore, the centerline of the air guide groove is located in a different plane from the axis to enhance the shielding effect.

[0014] Furthermore, the shielding section includes a shielding body and a shielding cylinder, the shielding cylinder housing the shielding body, and the shielding body being made of shielding material.

[0015] Furthermore, the shielding material is lead.

[0016] According to another aspect of the present invention, a radioactive transport container is also provided, comprising: a container body, the container body including an inner cylinder and an outer cylinder, a shielding layer disposed between the inner cylinder and the outer cylinder, a third fin disposed on the outer side of the outer cylinder, and the inner cylinder containing radioactive materials; a protective sleeve, the protective sleeve being fitted over the outer side of the container body; a protective seat, the protective seat being disposed at the bottom of the container body and connected to the container body; the radioactive container further comprising a protective cover and a container lid of any of the above, the protective cover covering the container lid to enhance the shock absorption effect of the transport container.

[0017] Furthermore, the protective cover includes: a first receiving cavity for accommodating shock-absorbing material; a second receiving cavity disposed on the side of the first receiving cavity near the center of the transport container for accommodating a fourth fire-retardant material; a limiting cavity covering the outer periphery of the container cover; a heat dissipation section fixedly connected to the first and second receiving cavities for dissipating heat from the transport container; and an impact-resistant section fixedly connected to the first and second receiving cavities.

[0018] Furthermore, multiple lifting plates are welded onto the outer cylinder, and lifting holes are provided on these lifting plates.

[0019] Furthermore, the heat dissipation section includes a first fin and a second fin, which are spaced apart. The first fin and the second fin are provided with circular holes, which correspond to the lifting holes to facilitate the lifting of the transport container.

[0020] Furthermore, the height of the first and second fins along the axial direction of the transport container is higher than that of the lifting plate, and the length of the first and second fins along the radial direction of the transport container is longer than that of the lifting plate, so as to ensure that when the transport container is subjected to impact, the first and second fins deform first to absorb the impact.

[0021] By applying the technical solution of this invention, at least the following beneficial effects are achieved:

[0022] 1. This invention, through a relatively simple structure, enables radioactive material transport containers to possess good impact resistance, fire resistance, shielding ability, and pressure resistance, thereby ensuring the safety of radioactive materials during transportation;

[0023] 2. By setting the inflation part and the shielding part independently, the shielding function and the inflation function are separated, which increases the shielding effect and structural strength of the shielding material;

[0024] 3. The height of the first and second fins along the axis of the transport container is higher than that of the lifting plate, and the length of the first and second fins along the radial direction of the transport container is longer than that of the lifting plate, so as to ensure that when the transport container is impacted, the first and second fins deform first to absorb the impact energy. Attached Figure Description

[0025] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 A schematic diagram of the structure of a radioactive material transport container is shown;

[0027] Figure 2 A cross-sectional view of the container lid is shown;

[0028] Figure 3 A front view of the container lid is shown;

[0029] Figure 4 An isometric view of the container lid is shown;

[0030] Figure 5 An isometric view of the inflatable block is shown;

[0031] Figure 6 An isometric view of the protective cover is shown;

[0032] Figure 7 A cross-sectional view of the protective cover is shown;

[0033] Figure 8 A cross-sectional view of the container body is shown;

[0034] Figure 9 An isometric view of the container body is shown;

[0035] Figure 10 A schematic diagram of the protective sleeve structure is shown.

[0036] The above figures include the following reference numerals:

[0037] 1. Protective cap; 2. Container cap; 3. Container body; 4. Protective sleeve; 5. Protective base; 6. First outer shell; 7. Shock-absorbing material; 8. First fireproof material; 9. First fin;

[0038] 10. Ring plate; 11. Inner shell; 12. Flange; 13. Inflation port cover; 14. Inflation block; 15. Cylinder; 16. Shielding body; 17. Base plate; 18. Inner cylinder; 19. Outer cylinder;

[0039] 20. Drain pipe; 21. Third fin; 22. Drain hole cover; 23. Bottom plate of cylinder; 24. Second outer shell; 25. Third outer shell; 26. Second fin; 27. Air guide groove; 28. Extension; 29. ​​Cover;

[0040] 30. Air outlet; 31. Second fireproof material; 32. Shielding layer; 33. Third fireproof material; 34. Fourth fireproof material; 35. Lifting plate; 36. Lifting hole; 37. Bottom ring plate; 38. Outer jacket;

[0041] 39. Inner sleeve;

[0042] 40. Top ring plate; 41. Fifth fireproof material. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] The present invention will be further described in detail below with reference to specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention. The term "comprising" indicates the presence of a feature, but does not exclude the presence or addition of one or more other features. The terms "lateral," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the purpose of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In this description, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0046] like Figure 1 As shown, the container lid 2 of the radioactive material transport container seals and shields the radioactive material inside the container body 3. After the radioactive material is placed into the container body 3, the container lid 2 is remotely connected to the container body 3.

[0047] Figures 2-4 The diagram shows the structure of container lid 2. The connecting portion of container lid 2 secures it to the transport container. Container lid 2 also includes a shielding portion and an inflation portion. The shielding portion is located on the side of the connecting portion near the center of the transport container. The inflation portion, which supplies gas to the transport container, is located between the connecting portion and the shielding portion. The inflation portion and the shielding portion are fitted together to form a cylindrical or conical surface. The cylindrical or conical surface includes a first side surface and a second side surface. The first side surface is located on the shielding portion, and the second side surface is located on the inflation portion. The first side surface and the second side surface form a cylindrical or conical surface to seal the container body 3. The shielding layer 32 of the container body 3 and container lid 2 effectively shields against radioactivity and ensures the sealing of the inner cavity of the container body.

[0048] The shielding portion of the container cover 2 includes a shielding body 16 and a shielding cylinder, wherein the shielding cylinder houses the shielding body 16, and the shielding body 16 may be made of shielding materials such as lead. The shielding cylinder is assembled and welded from a cylinder and a base plate 17, and is filled with shielding material inside. The connection portion of the container cover 2 may be designed as a flange 12. A sealing ring is provided on the outer edge of the flange 12, which is welded to the cylinder 15, the base plate 17, etc.

[0049] The inflation part of the container lid 2 includes an inflation block 14 and an inflation port cover 13. The inflation block 14 can be made of stainless steel, such as 304 stainless steel, and includes a groove, a second side surface, and an inflation channel. The inflation channel includes an air inlet and an air outlet 30; the air inlet is located at the bottom of the groove, and the air outlet 30 is located on the second side surface. The inflation port cover 13 is located above the inflation block 14 and has a sealing ring to cover the inflation port of the inflation block 14. The cross-section of the inflation port cover 13 along its axis is T-shaped, including a cover portion 29 and an extension portion 28. The cover portion 29 is fixedly connected to the inflation block 14, and the extension portion 28 mates with the groove, and the extension portion 28 has an annular groove to accommodate the sealing ring.

[0050] The container lid 2 separates the shielding and inflation functions by independently setting the inflation part and the shielding part, thereby increasing the shielding effect and structural strength of the shielding material.

[0051] like Figures 3-4 As shown, the gas-filled block 14 also includes a gas guide groove 27, which is formed on the second side. Gas is guided into the container cylinder 3 through the gas guide groove 27. The center line of the gas guide groove 27 is located in a different plane from the axis, thereby preventing direct radiation from radioactive materials and optimizing the shielding effect.

[0052] The present invention also provides a radioactive material transport container, comprising a container body 3, a container lid 2, a protective cover 1, a protective sleeve 4, and a protective base 5, all of which are connected to the container body 3. The protective sleeve 4 is disposed on the outside of the container body 3. The protective base 5 is disposed at the bottom of the container body 3 and connected to the container body 3. Furthermore, the radioactive container also includes the protective cover 1 and the aforementioned container lid 2, wherein the protective cover 1 covers the container lid 2 to enhance the shock absorption effect of the transport container.

[0053] for Figures 8-9 The container body 3 is assembled and welded from an inner cylinder 18, an outer cylinder 19, a drain pipe 20, and a bottom plate 23. The outer cylinder 19 has a third fin 21 on its outer surface, and multiple lifting plates 35 are welded onto it, with lifting holes 36 on each plate. The inner cylinder 18 houses a basket for containing radioactive materials. A shielding layer 32 is placed between the inner cylinder 18 and the outer cylinder 19. A first fireproof material 8 is placed on the top outer side, a second fireproof material 31 on the bottom, and a third fireproof material 33 on the bottom side. The inner cylinder 18, the outer cylinder 19 with manufacturing process holes, and the drain pipe 20 are welded to form a cavity. The shielding layer 32 is filled into the cavity through the process holes of the outer cylinder 19. After filling, the process holes are sealed. Fireproof material is then filled into the upper and lower parts of the outer cylinder 19. Finally, the third fin 21, the drain hole cover 22, and the bottom plate 23 are installed to form the container body 3. A drain hole cover 22 is provided at the bottom end of the drain pipe 20, and a sealing ring is provided on the drain hole cover 22.

[0054] for Figures 6-7 The protective cover 1 shown is formed by welding together an inner shell 11, a first outer shell 6, a second outer shell 24, and a third outer shell 25. The protective cover 1 is welded together to form a first receiving cavity, a second receiving cavity, and a limiting cavity. The first receiving cavity contains shock-absorbing material 7; the second receiving cavity is located on the side of the first receiving cavity near the center of the transport container and contains a fourth fireproof material 34; the limiting cavity is provided around the outer periphery of the container cover 2 and fits with the outer periphery of the container cover 2.

[0055] The protective cover 1 also includes a heat dissipation section to remove heat from the transport container. The heat dissipation section is fixedly connected to the first and second receiving cavities. The heat dissipation section includes a first fin 9 and a second fin 26, which can be welded to the inner shell 11 and are spaced apart. The first fin 9 and the second fin 26 are provided with circular holes, which correspond to the lifting holes 36 to facilitate the lifting of the transport container. To ensure that when the transport container is impacted, the first fin 9 and the second fin 26 deform first, followed by the lifting plate 35, the height of the first fin 9 and the second fin 26 along the axial direction of the transport container is set to be higher than that of the lifting plate 35, and the length along the radial direction of the transport container is set to be longer than that of the lifting plate 35. Specifically, the first fin 9 and the second fin 26 deform first to absorb the impact, reducing the impact force on the lifting plate.

[0056] The protective cover 1 also includes an impact-resistant section, which can adopt a ring plate 10 structure, providing good impact resistance. The ring plate 10 is fixedly connected to the first and second receiving cavities. The protective cover 1, protective sleeve 4, and protective seat 5 can all absorb energy through deformation to reduce the load on the container body 3 and container cover 2 components. During welding, the damping material 7 and shielding material are first filled into the first and second receiving cavities respectively, and then welded. The damping material 7 can be made of materials such as aluminum foam. The protective cover 1 can be made of fire-resistant material to reduce the temperature of the container body 3 and container cover 2 components when the ambient temperature rises for a short time.

[0057] for Figure 10 The protective sleeve 4 is a welded structure composed of an inner sleeve 39, an outer sleeve 38, a top ring plate 40, and a bottom ring plate 37, with fire-retardant material filling the interior. The inner sleeve 39 and outer sleeve 38 are welded to the top ring plate 40 or the bottom ring plate 37 to form a cavity, which is then filled with a fifth type of fire-retardant material 41. Finally, the bottom ring plate 37 or the top ring plate 40 is installed to form the protective sleeve 4. The protective sleeve 4, through the fire-retardant material, can reduce the temperature of the container body 3 and the container lid 2 components when the ambient temperature rises temporarily.

[0058] The protective base 5 is formed by welding steel plates. The protective cover 1, protective sleeve 4, and protective base 5 can all improve the container's impact resistance and fire resistance. Before connecting the protective cover 1, the container cover 2 and protective sleeve 4 should be connected to the container body 3 first.

[0059] In use, the protective cap 1 is removed from the container body 3. Depending on the size of the room where the radioactive material is stored, it is determined whether the protective sleeve 4 and protective base 5 need to be removed. The container cap 2 is remotely removed from the room where the radioactive material is stored, the radioactive material is placed into the container body 3, and then the container cap 2 is remotely connected to the container body 3. Afterwards, the protective sleeve 4, protective base 5, and protective cap 1 are connected to the container body 3. After passing inspection, it is secured to the transport vehicle, and transportation begins. A basket can be placed inside the container body 3.

[0060] In summary, it can be seen from the above description that the embodiments of the present invention achieve the following technical effects:

[0061] 1. This invention, through a relatively simple structure, enables radioactive material transport containers to possess good impact resistance, fire resistance, shielding ability, and pressure resistance, thereby ensuring the safety of radioactive materials during transportation;

[0062] 2. By setting the inflation part and the shielding part independently, the shielding function and the inflation function are separated, which increases the shielding effect and structural strength of the shielding material;

[0063] 3. The height of the first fin 9 and the second fin 26 along the axis of the transport container is higher than that of the lifting plate, and the length of the first fin 9 and the second fin 26 along the radial direction of the transport container is longer than that of the lifting plate, so as to ensure that the first fin 9 and the second fin 26 deform first when the transport container is impacted.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A container lid fixed to a radioactive article transport container, the container lid (2) comprising a connecting portion that fixes the container lid (2) to the transport container, characterized in that, The container cover (2) further includes: a shielding part, which is disposed on the side of the connecting part near the center of the transport container; and an inflation part, which provides gas to the transport container. The inflation part is disposed between the connecting part and the shielding part, and the inflation part is adjacently assembled with the shielding part to form a cylindrical surface or a conical surface. The cylindrical surface or the conical surface includes a first side surface and a second side surface. The first side surface is disposed on the shielding part, and the second side surface is disposed on the inflation part. An inflatable block (14) and an inflation port cover (13) are provided, wherein the inflation port cover (13) covers the inflatable block (14); the inflatable block (14) includes a groove, a second side surface and an inflation channel, wherein the inflation channel includes an air inlet and an air outlet (30), wherein the air inlet is located at the bottom of the groove and the air outlet (30) is located on the second side surface; The inflatable block (14) also includes an air guide groove (27), which is opened on the second side. The center line of the air guide groove (27) and the axis of the inflatable hole cover (13) are located in different planes to enhance the shielding effect.

2. The container lid according to claim 1, characterized in that, The cross-section of the air hole cover (13) along the axis of the air hole cover (13) is a T-shaped surface. The air hole cover (13) includes a cover part (29) and an extension part (28). The cover part (29) is fixedly connected to the air block (14). The extension part (28) is engaged with the groove.

3. The container lid according to claim 2, characterized in that, The extension (28) has an annular groove to accommodate the sealing ring.

4. The container lid according to claim 3, characterized in that, The shielding part includes a shielding body (16) and a shielding cylinder, the shielding cylinder accommodating the shielding body (16), and the shielding body (16) being made of shielding material.

5. The container lid according to claim 4, characterized in that, The shielding material is lead.

6. A radioactive transport container, the radioactive transport container comprising: The container body (3) includes an inner cylinder (18) and an outer cylinder (19), a shielding layer (32) is provided between the inner cylinder (18) and the outer cylinder (19), a third fin (21) is provided on the outer side of the outer cylinder (19), and the inner cylinder (18) contains radioactive materials; a protective sleeve (4) is fitted on the outside of the container body (3); a protective seat (5) is provided at the bottom of the container body (3) and connected to the container body (3); characterized in that the radioactive container further includes a protective cover (1) and a container cover (2) according to any one of claims 1-5, the protective cover (1) covering the container cover (2) to enhance the shock absorption effect of the transport container.

7. The transport container according to claim 6, characterized in that, The protective cover (1) includes: a first receiving cavity, which contains shock-absorbing material (7); a second receiving cavity, which is located on the side of the first receiving cavity near the center of the transport container, and contains a fourth fireproof material (34); a limiting cavity, which covers the outer periphery of the container cover (2); a heat dissipation part, which is fixedly connected to the first receiving cavity and the second receiving cavity, and the heat dissipation part removes the heat from the transport container; and an impact-resistant part, which is fixedly connected to the first receiving cavity and the second receiving cavity.

8. The transport container according to claim 7, characterized in that, Multiple lifting plates (35) are welded onto the outer cylinder (19), and lifting holes (36) are provided on the multiple lifting plates (35).

9. The transport container according to claim 8, characterized in that, The heat dissipation part includes a first fin (9) and a second fin (26), the first fin (9) and the second fin (26) are spaced apart, and the first fin (9) and the second fin (26) are provided with round holes, which correspond to the lifting holes (36) to facilitate the lifting of the transport container.

10. The transport container according to claim 9, characterized in that, The height of the first fin (9) and the second fin (26) along the axial direction of the transport container is higher than that of the lifting plate (35), and the length of the first fin (9) and the second fin (26) along the radial direction of the transport container is longer than that of the lifting plate (35), so as to ensure that when the transport container is impacted, the first fin (9) and the second fin (26) deform first to absorb the impact.

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