Modularized movable hot chamber shielding module

Abstract

The invention relates to the technical field of hot chambers, and provides a modular mobile hot chamber shielding module which comprises a bottom module, a top module and four side modules, the bottom module, the top module and the four side modules are spliced and enclosed to form a cuboid structure, and the adjacent modules are connected through fasteners; the bottom module is of a plate-shaped structure formed by splicing a plurality of bottom sub-modules, and the adjacent bottom sub-modules are positioned through first positioning pins; the top module is of a plate-shaped structure formed by splicing a plurality of top sub-modules. Each side face module is of a plate-shaped structure formed by splicing a plurality of side face sub-modules, and the adjacent side face sub-modules are connected through fasteners. In each side surface module, two layers of side surface sub-modules are arranged in the height direction, and the upper layer of side surface sub-module and the adjacent lower layer of side surface sub-module are positioned through a second positioning pin; and the bottom module and each lower-layer side surface sub-module are positioned through a third positioning pin. The modular degree is higher, the transfer size is conveniently reduced, and transfer is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of hot chambers, and in particular to a modular mobile hot chamber shielding module. Background Art

[0002] The hot cell is an important facility used for various operations and inspections of radioactive items such as nuclear fuel and materials, and has sufficient radioactive containment and radiation shielding functions. Conventional hot cells are built together with the building and are non-movable nuclear facilities. The mobile hot cell adopts a modular solution and can be disassembled and transported to the nuclear power site, and quickly assembled to form a complete hot cell system. The main structure of the mobile hot cell consists of several parts such as the shielding module, the base and the hot cell shell, which constitute most of the mass of the mobile hot cell. The shielding module provides radiation protection, and the base module constitutes the installation platform.

[0003] At present, some existing shielding modules are composed of an integral support frame and a number of shielding plates. Although this structure is convenient for disassembly and transfer to a certain extent, the integral support frame is still large in size and inconvenient to transfer. Therefore, how to provide a modular mobile hot chamber shielding module that is convenient for reducing the transfer volume is an urgent problem to be solved in the field. Summary of the invention

[0004] The object of the present invention is to provide a modular mobile hot chamber shielding module to solve the above-mentioned defects of the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A modular mobile hot chamber shielding module comprises a bottom module, a top module and four side modules, wherein the bottom module, the top module and the four side modules are spliced ​​and enclosed to form a rectangular parallelepiped structure, and adjacent modules are connected by fasteners;

[0007] The bottom module is formed by splicing a plurality of bottom submodules to form a plate-like structure, and adjacent bottom submodules are positioned by first positioning pins;

[0008] The top module is formed into a plate-like structure by splicing several top submodules;

[0009] The side modules are all spliced ​​together to form a plate-like structure by a number of side sub-modules, and adjacent side sub-modules are connected by fasteners; in each side module, the side sub-modules are arranged in two layers along the height direction, and the upper side sub-module and the adjacent lower side sub-module are positioned by the second positioning pin; the bottom module and each lower side sub-module are positioned by the third positioning pin.

[0010] Optionally, the joint seams between adjacent bottom submodules, the joint seams between adjacent top submodules, the joint seams between adjacent side submodules, and the joint seams between adjacent modules are all in a stepped shape.

[0011] Optionally, among two adjacent bottom submodules, one of the bottom submodules is provided with a positioning protrusion at each end of the joint, and the other bottom submodule is provided with a positioning recess matched with the positioning protrusion, and the first positioning pin is passed through the positioning protrusion and the positioning recess.

[0012] Optionally, one of the two adjacent side submodules is provided with a side connecting rib, and the side connecting rib is placed on the other side submodule and connected thereto by a fastener.

[0013] Optionally, one of the two adjacent top submodules is provided with a top connecting rib, and the top connecting rib is placed on the other top submodule.

[0014] Optionally, the hole for installing the second positioning pin in the lower layer of the side submodule is a cylindrical hole, and the hole for installing the second positioning pin in the adjacent upper layer of the side submodule is a waist-shaped hole, and the length direction of the waist-shaped hole is the thickness direction of the side module.

[0015] Optionally, the bottom submodule, the top submodule and the side submodule are all provided with a lifting ring mounting hole for mounting a lifting ring.

[0016] Optionally, the bottom submodule, the top submodule and the side submodule are all made of carbon steel.

[0017] Optionally, the bottom submodule, the top submodule and the side submodule each include a carbon steel substrate and a stainless steel covering coated on the outside of the carbon steel substrate.

[0018] Optionally, the bottom submodule, top submodule and side submodule all include a stainless steel shell and a lead core filling the interior of the stainless steel shell; the bottom submodule is provided with a stainless steel mounting column at a location where a hole needs to be set, the hole is set on the stainless steel mounting column, and the stainless steel mounting column is welded to the stainless steel shell.

[0019] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0020] 1. In the present invention, the shielding module is composed of a bottom module, a top module and four side modules, and the adjacent modules are connected and fastened by fasteners to finally enclose a rectangular structure. Moreover, each module is composed of a plurality of sub-modules. Compared with the prior art, the use of a large-volume skeleton is avoided, so that the shielding module can be disassembled into a plurality of sub-modules, with a higher degree of modularization, which is convenient for reducing the transfer volume and making the transfer more convenient.

[0021] 2. In the present invention, the upper side submodule and the adjacent lower side submodule in the side module are positioned by the second positioning pin, the bottom module and each lower side submodule are positioned by the third positioning pin, and the adjacent bottom submodules in the bottom module are positioned by the first positioning pin. With such arrangement, during installation, the second positioning pin is first used to position the bottom module, and the bottom module is assembled as the installation basis. Then, the third positioning pin is used to position the lower side submodules on the bottom module, and then the second positioning pin is used to position the upper side submodules on the lower side submodules. Finally, the top module is covered, and the fasteners are tightened to complete the assembly of the shielding module. When disassembling, the shielding module can be disassembled into several submodules by reverse order. Disassembly and assembly are convenient, and the positioning is also reliable through the positioning pins set during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the front structure of a modular mobile hot chamber shielding module provided by the present invention;

[0024] Figure 2 A schematic diagram of the back structure of a modular mobile hot chamber shielding module provided by the present invention;

[0025] Figure 3 It is a structural schematic diagram of the bottom module;

[0026] Figure 4 It is a structural diagram of the bottom submodule;

[0027] Figure 5 It is a schematic diagram of the structure of the top module;

[0028] Figure 6 It is a structural schematic diagram of the front module;

[0029] Figure 7 This is an exploded view of the front module;

[0030] Figure 8 is a schematic diagram of the installation structure of the second positioning pin;

[0031] Fig. 9 It is a structural schematic diagram of the rear module;

[0032] Fig.10 It is a structural diagram of the left module;

[0033] Fig.11 It is a structural diagram of the module on the right;

[0034] Fig.12 This is a schematic diagram of the structural design of the bottom submodule in the second solution;

[0035] Fig.13 This is a schematic diagram of the structural design of the bottom submodule in the third solution;

[0036] Icon: 1- bottom module, 101- bottom submodule, 1011- positioning protrusion, 1012- positioning groove, 1013- stainless steel covering, 1014- carbon steel base, 1015- stainless steel shell, 1016- lead inner core, 1017- stainless steel mounting column, 2- top module, 201- top submodule, 2011- top connecting rib, 3- front module, 301- side submodule, 3011- side connecting rib, 4- rear module, 5- left module, 6- right module, 7- second positioning pin. DETAILED DESCRIPTION

[0037] refer to Figure 1 and Figure 2 A modular mobile hot chamber shielding module comprises a bottom module 1, a top module 2 and four side modules. The bottom module 1, the top module 2 and the four side modules are spliced ​​and enclosed to form a rectangular structure. Adjacent modules are connected by fasteners (preferably screws, the same below). At the same time, each module of the present invention is composed of a plurality of sub-modules. Compared with the prior art, the use of a large-volume skeleton is avoided, so that the shielding module can be disassembled into a plurality of sub-modules, with a higher degree of modularization, which is convenient for reducing the transfer volume and making the transfer more convenient.

[0038] refer to Figure 2-Figure 11 The joint seams between adjacent bottom submodules 101, the joint seams between adjacent top submodules 201, the joint seams between adjacent side submodules 301, and the joint seams between adjacent modules are all in a stepped shape. This arrangement facilitates ensuring the shielding effect.

[0039] On the basis of the above, it is necessary to ensure that the joints between the modules and the adjacent modules are in a stepped shape. The top of the bottom module 1 is provided with downward steps, and the bottom of the top module 2 is provided with upward steps. Correspondingly, steps are also provided around each side module, and they are spliced ​​together to form a stepped joint.

[0040] The bottom module 1 is formed into a plate-like structure by splicing several bottom sub-modules 101. It is easy to understand that in order to ensure that the splicing seams between adjacent bottom sub-modules 101 mentioned above are in a stepped shape, the surface of the bottom sub-module 101 used for splicing should be provided with splicing steps. After splicing, the two bottom sub-modules 101 are flush on the upper and lower surfaces. One or more splicing steps can be provided so that the splicing seams are in the shape of a single step or multiple steps. Preferably, the splicing steps are preferably arranged as multiple steps to facilitate effective shielding of radiation.

[0041] The adjacent bottom submodules 101 are positioned by the first positioning pins. Specifically, among the two adjacent bottom submodules 101, one of the bottom submodules 101 is provided with a positioning protrusion 1011 at both ends of the joint, and the other bottom submodule 101 is provided with a positioning recess matched with the positioning protrusion 1011. The first positioning pin is passed through the positioning protrusion 1011 and the positioning recess. It is worth noting that the cooperation between the positioning protrusion 1011 and the positioning recess 1012 ensures that the upper and lower surfaces of the bottom submodule 101 will not bulge (i.e., avoid affecting the flatness of the upper and lower surfaces). During installation, the first positioning pins can be used to quickly position the bottom submodule 101. In practical applications, the bottom module 1 is connected to the mobile hot chamber base through fasteners after assembly, serving as the installation basis for other modules.

[0042] The top module 2 is formed into a plate-like structure by splicing a number of top submodules 201. The splicing method is the same as that of the bottom submodule 101. Splicing steps are also provided to ensure the shielding effect. Among two adjacent top submodules 201, one of the top submodules 201 is provided with a top connecting rib 2011. The top connecting rib 2011 is placed on the other top submodule 201. The top connecting rib 2011 improves the strength of the splicing seam. In addition, in order to avoid excessive degrees of freedom, the top submodules 201 are not positioned by positioning pins. At the same time, adjacent top submodules 201 are not fastened and connected. They are only spliced ​​together and then connected and fixed to each side module by fasteners.

[0043] The side modules are all formed into a plate-like structure by splicing a number of side submodules 301. The splicing method is similar to the splicing method of the top module 2 and the bottom module 1. The shielding effect is also ensured by using stepped splicing steps. Among two adjacent side submodules 301, one side submodule 301 is provided with a side connecting rib 3011. The side connecting rib 3011 is placed on the other side submodule 301. On the one hand, the side connecting rib 3011 improves the strength. On the other hand, the side connecting rib 3011 serves as a connecting part, which is connected and fastened to the adjacent side submodule 301 through a fastener.

[0044] In each side module, the side submodules 301 are arranged in two layers along the height direction, and the upper side submodule 301 and the adjacent lower side submodule 301 are positioned by the second positioning pins 7. Figure 8 As an option, in this embodiment, the hole for installing the second positioning pin 7 in the lower side submodule 301 is a cylindrical hole, and the hole for installing the second positioning pin 7 in the adjacent upper side submodule 301 is a waist-shaped hole, and the length direction of the waist-shaped hole is the thickness direction of the side module. With this arrangement, for the side modules on the front and rear sides, during installation, the upper side submodule 301 can be allowed to move in the front and rear directions within the length range of the waist-shaped hole, while the left and right directions are restricted; similarly, for the side modules on the left and right sides, the upper side submodule 301 can be allowed to move in the left and right directions within the length range of the waist-shaped hole, while the front and rear directions are restricted, so as to adapt to certain processing errors and installation errors.

[0045] The bottom module 1 and each lower side submodule 301 are positioned by a third positioning pin, that is, a corresponding pin hole for installing the third positioning pin is provided on the bottom module 1 corresponding to each lower side submodule 301, and a third positioning pin is penetrated at the corresponding position of each lower side submodule 301 and the bottom module 1. This arrangement ensures that the lower side submodule 301 can be quickly positioned during installation, thereby improving installation efficiency.

[0046] As an option, refer to Figure 3 In this embodiment, the bottom module 1 has five bottom submodules 101; Figure 5 , the top module 2 has five top submodules 201. For the convenience of description, the side modules are named as the front module 3, the rear module 4, the left module 5 and the right module 6, respectively, Figure 6 and Figure 7 , each layer of the front side module 3 has four side submodules 301, a total of eight; Fig. 9 , the rear side module 4 has three side submodules 301 on the lower layer and four side submodules 301 on the upper layer, a total of seven; Fig.10 and Fig.11 , the left module 5 and the right module 6 have two side submodules 301 on each layer, for a total of four. By adopting the above solution, the splicing seam on the front module 3 can be staggered with the splicing seam on the bottom module 1 (or the top module 2), thereby improving the shielding reliability. It is easy to understand that in other embodiments, the number of submodules of each module can also be designed according to the actual volume and size requirements of the shielding module.

[0047] In actual applications, the bottom submodule 101, the top submodule 201 and the side submodule 301 are all provided with eyelet mounting holes for mounting eyelets, which are convenient for lifting, transfer and installation. Each submodule can also be marked with a permanent serial number by engraving or other methods, so that they can be installed one by one in the order of the numbers during installation. In addition, it should be understood that in actual applications, other holes such as drainage pipe holes, cable holes, waste liquid discharge pipe holes, air supply pipe holes, shielding door installation holes, peep window installation holes, manipulator installation holes, auxiliary operation protection door installation holes, etc. should be reserved on the shielding module.

[0048] Each submodule (ie, the bottom submodule 101, the top submodule 201, and the side submodule 301) should be made of a shielding material having a certain thickness. A variety of solutions can be adopted in material selection and structural design. The present invention can adopt the following three solutions.

[0049] The first solution: the bottom submodule 101, the top submodule 201 and the side submodule 301 are all made of carbon steel. When this solution is adopted, the various hole positions (including through holes, screw holes) on the bottom submodule 101, the top submodule 201 and the side submodule 301 can be directly processed. The overall structure is simple and easy to process, which can reduce the manufacturing cost. However, it should be noted that anti-rust measures should be taken on the surface.

[0050] The second option: Reference Fig.12 (The bottom submodule 101 is taken as an example in the figure), the bottom submodule 101, the top submodule 201 and the side submodule 301 all include a carbon steel substrate 1014 and a stainless steel covering 1013 coated on the outside of the carbon steel substrate 1014. In actual application, a thin layer of stainless steel covering 1013 is laid on the carbon steel substrate 1014. When manufacturing the carbon steel substrate 1014, it is necessary to remove excess materials to ensure that the overall size of the module after laying the stainless steel covering 1013 meets the design requirements. All structural elements of the module need to be processed on the body of the carbon steel substrate 1014, and the stainless steel covering 1013 can be connected and fixed to the carbon steel substrate 1014 by spot welding or other methods. When the stainless steel-coated carbon steel solution is adopted, the carbon steel substrate 1014 provides radiation shielding and structural strength support functions, and the stainless steel covering 1013 provides surface rust prevention function and achieves an aesthetic effect.

[0051] The third option: Reference Fig.13(The bottom submodule 101 is taken as an example in the figure), the bottom submodule 101, the top submodule 201 and the side submodule 301 all include a stainless steel shell 1015 and a lead core 1016 filling the interior of the stainless steel shell 1015. In actual applications, the stainless steel shell 1015 is formed by stainless steel with sufficient thickness, and molten lead liquid is cast in the internal cavity of the stainless steel shell 1015. The lead core 1016 is formed after the lead liquid solidifies. The stainless steel shell 1015 and the lead core 1016 together provide sufficient radiation shielding capability. Since the shielding effect of lead is excellent, the thickness of the submodule can be effectively reduced by adopting this solution.

[0052] The bottom submodule 101 is provided with a stainless steel mounting column 1017 at the location where a hole is required to be set, so as to improve the connection strength. The hole is set on the stainless steel mounting column 1017, and the stainless steel mounting column 1017 is welded to the stainless steel shell 1015. The lead liquid is cast and melted and then combined with the stainless steel mounting column 1017. Furthermore, a threaded structure can be processed on the outer cylindrical surface of the stainless steel mounting column 1017 to fully combine with the stainless steel mounting column 1017 when the lead liquid solidifies, thereby improving the bonding force between the stainless steel mounting column 1017 and the lead inner core 1016.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A modular mobile hot chamber shielding module, characterized in that: It includes a bottom module, a top module and four side modules, which are spliced ​​and enclosed to form a rectangular structure, and adjacent modules are connected by fasteners; The bottom module is formed by splicing a plurality of bottom submodules to form a plate-like structure, and adjacent bottom submodules are positioned by first positioning pins; The top module is formed into a plate-like structure by splicing several top submodules; The side modules are all spliced ​​together to form a plate-like structure by a number of side sub-modules, and adjacent side sub-modules are connected by fasteners; in each side module, the side sub-modules are arranged in two layers along the height direction, and the upper side sub-module and the adjacent lower side sub-module are positioned by the second positioning pin; the bottom module and each lower side sub-module are positioned by the third positioning pin.

2. The modular mobile hot chamber shielding module according to claim 1, characterized in that: The joint seams between adjacent bottom submodules, the joint seams between adjacent top submodules, the joint seams between adjacent side submodules, and the joint seams between adjacent modules are all in a stepped shape.

3. The modular mobile hot chamber shielding module according to claim 1, characterized in that: Among the two adjacent bottom submodules, one of the bottom submodules is provided with a positioning protrusion at both ends of the joint, and the other bottom submodule is provided with a positioning recess matched with the positioning protrusion, and the first positioning pin is passed through the positioning protrusion and the positioning recess.

4. The modular mobile hot chamber shielding module according to claim 1, characterized in that: Among two adjacent side submodules, one of the side submodules is provided with a side connecting rib, and the side connecting rib is placed on the other side submodule and connected thereto by a fastener.

5. The modular mobile hot chamber shielding module according to claim 1, characterized in that: Among two adjacent top submodules, one of the top submodules is provided with a top connecting rib, and the top connecting rib is placed on the other top submodule.

6. The modular mobile hot chamber shielding module according to claim 1, characterized in that: The hole for installing the second positioning pin in the lower layer side submodule is a cylindrical hole, and the hole for installing the second positioning pin in the adjacent upper layer side submodule is a waist-shaped hole, and the length direction of the waist-shaped hole is the thickness direction of the side module.

7. The modular mobile hot chamber shielding module according to any one of claims 1 to 6, characterized in that: The bottom submodule, the top submodule and the side submodule are all provided with a lifting ring mounting hole for mounting a lifting ring.

8. The modular mobile hot chamber shielding module according to any one of claims 1 to 6, characterized in that: The bottom submodule, the top submodule and the side submodules are all made of carbon steel.

9. The modular mobile hot chamber shielding module according to any one of claims 1 to 6, characterized in that: The bottom submodule, the top submodule and the side submodule all include a carbon steel matrix and a stainless steel covering wrapped around the outside of the carbon steel matrix.

10. The modular mobile hot chamber shielding module according to any one of claims 1 to 6, characterized in that: The bottom submodule, top submodule and side submodule all include a stainless steel shell and a lead core filling the interior of the stainless steel shell, and stainless steel mounting columns are provided at locations where holes need to be set, the holes are set on the stainless steel mounting columns, and the stainless steel mounting columns are welded to the stainless steel shell.

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