Modulator radiation shield

Abstract

The present application provides a kind of modulator radiation shielding device, for accommodating modulator.Modulator radiation shielding device includes: lower shielding body module;At least two middle shielding body modules are stacked one by one, and the middle shielding body module includes shielding frame and shielding tube, and the combination site of middle shielding body module and lower shielding body module is mutually embedded.Joint shielding body module;The wall of lower shielding body module, middle shielding body module and upper shielding body module all contains metal partition that blocks the penetration of radiation, and the metal partition at least partially overlaps in the mutually embedded site.Lower shielding body module, multiple middle shielding body modules and upper shielding body module combination form a shielding device containing modulator, and the metal partition embedded in the inside is blocked in the whole to prevent radiation from penetrating, to keep the normal work and operation of modulator, not affected by radiation.The metal partition surrounds to form hollow cavity structure, and forms labyrinthine radiation blocking structure at the combination site.

Description

Technical Field

[0001] This invention relates to the field of radiation protection technology, and specifically to a modulator radiation shielding device. Background Technology

[0002] High-energy X-ray nondestructive testing (HDT) equipment utilizes microwaves to accelerate electrons, which then bombard a high atomic number target material, generating X-rays with a continuous energy spectrum. HDT equipment detects defects in the workpiece by observing the different attenuations of X-rays at varying densities and thicknesses.

[0003] During the detection process, high-energy X-ray radiation interacts with matter, potentially damaging some equipment, especially those containing semiconductor devices. The effects of irradiation on semiconductor devices include two main types of damage:

[0004] First, the total dose effect is the ionizing radiation effect of accumulated radiation dose, which is the total absorbed energy level that a semiconductor device can withstand before its characteristics undergo significant changes. When semiconductor devices are exposed to radiation for a long time, trap charges accumulate inside the gate oxide layer and at the interface. These charges can lead to functional degradation or even failure of the semiconductor device. The total dose effect can cause problems such as transistor threshold voltage drift, increased leakage current at the field oxide edge, decreased transconductance, increased channel and junction leakage current, and even gate oxide breakdown.

[0005] Second, the dose rate effect refers to the interaction between high dose rates of gamma rays and X-rays incident on semiconductor materials and semiconductor devices, which excites secondary electrons and generates electron-hole pairs within the material. The dose rate effect mainly produces the photoelectric effect, triggering a large photocurrent. These additional photocurrents can cause logic malfunctions, latch-up, or even burnout in digital circuits. For analog circuits, it can cause output saturation, surge currents in the power supply circuit, and other issues, leading to circuit device failure.

[0006] In high-energy X-ray detection, a common scenario is to separate the X-ray source and the high-voltage modulator. The X-ray source is installed in a dedicated radiation protection room, while the high-voltage modulator is placed in another room, thus preventing the high-voltage modulator from being irradiated by X-rays.

[0007] With the development of modulator technology, modulators have evolved into all-solid-state modulators. In particular, the inductive superposition type solid-state modulator places the energy storage element on the primary side of the transformer. After the switch is triggered, the primary capacitor discharges and the voltage is boosted through the shunt ratio transformer. If this structure transmits high voltage through a high-voltage cable of hundreds of meters, it will cause the pulse waveform to be distorted, which does not meet the input requirements of the magnetron. Therefore, the modulator and the head unit must be placed together.

[0008] However, in some applications, such as the inspection of ultra-large workpieces and outdoor field inspections at nuclear power plants, there is no dedicated shielded room. The charging unit and control unit in the modulator are composed of various semiconductor components. During outdoor field inspections, the modulator is exposed to X-rays, which can damage the semiconductor components inside the modulator, leading to technical problems such as abnormal operation or even damage to the modulator. Summary of the Invention

[0009] To address the technical problem that existing technologies struggle to block radiation from modulators outdoors, this invention proposes a modulator radiation shielding device.

[0010] A first aspect of the present invention provides a modulator radiation shielding device for housing a modulator, the modulator radiation shielding device comprising:

[0011] Lower shielding module;

[0012] At least two intermediate shielding modules are stacked one after another. The intermediate shielding module includes an annular shielding frame and shielding tubes distributed in the shielding frame. The intermediate shielding module is stacked on the lower shielding module, and the joint of the intermediate shielding module and the lower shielding module is interlocked with each other.

[0013] The upper shielding module is fastened to the middle shielding module, and the joints between the middle shielding module and the upper shielding module are interlocked; wherein,

[0014] The walls of the lower shielding module, the middle shielding module, and the upper shielding module all contain metal partitions that block the penetration of rays, and the metal partitions overlap at least partially at the interlocking parts.

[0015] In one embodiment, the overlapping portion between the middle shielding module and the lower shielding module has a complementary stepped structure.

[0016] In one embodiment, the lower shield module includes a base support and a bottom cover that cooperate with each other. The metal partition includes at least one bottom partition. The bottom partition is laid on the base support. The bottom cover is placed on the bottom partition and connected to the base support. The edges of the bottom cover and the bottom partition form a stepped structure. The middle shield module is pressed against at least one stepped structure of the bottom cover.

[0017] In one embodiment, the lower shield module further includes a bottom step cover plate fixed to the base, a lateral mounting groove is formed between the bottom step cover plate and the base, the metal partition includes at least two bottom side partitions, the bottom side partitions are embedded in the lateral mounting groove, the bottom side partitions are pressed against the step surface of the base cover, and the middle shield module is matched and pressed against the step structure of the bottom step cover plate.

[0018] In one embodiment, the bottom side partition includes four pieces, which are sequentially and alternately connected to form a ring, and the ends of two adjacent bottom side partitions have complementary stepped structures.

[0019] In one embodiment, the middle shielding module includes a thin-walled annular middle retainer, and the metal partition includes at least two middle side partitions that are combined into an annulus and embedded in the middle retainer. The two ends of the middle shielding module respectively form a first step portion and a second step portion. The first step portion is used to interlock with the lower shielding module; or, the first step portion is used to interlock with the second step portion of another middle shielding module that is superimposed on each other.

[0020] In one embodiment, one end of the central retainer is configured as a central step portion, and the central side partition is inserted into the other end of the central retainer to abut against the inner sidewall of the matching central step portion.

[0021] In one embodiment, the joint between two adjacent middle partitions has a complementary stepped structure.

[0022] In one embodiment, the modulator radiation shielding device forms a hollow radiation shielding cavity, and the shielding tube is assembled on opposite side walls of the middle shielding module.

[0023] In one embodiment, the upper shielding module includes an upper cover that covers the middle shielding module, and the metal partition includes a top partition that covers the upper cover and a top side partition that is embedded in the upper cover. The top side partition and the upper cover are fastened to the middle shielding module, and the area of ​​the top partition is larger than the area of ​​the inner hole region of the middle shielding module.

[0024] In one embodiment, the top partition is fastened to the upper cover.

[0025] In one embodiment, the upper shielding module further includes an upper cover that covers the top partition, the lateral edge of the upper cover being flush with the lateral edge of the upper cover.

[0026] In this invention, a lower shielding module, multiple middle shielding modules, and an upper shielding module are combined to form a shielding device that houses the modulator. Internally embedded metal partitions completely block radiation penetration, ensuring the modulator's normal operation and preventing radiation interference. The lower shielding module, multiple middle shielding modules, and upper shielding module are all modular prefabricated components, allowing for individual transport and assembly, thus improving assembly flexibility for outdoor use. The metal partitions form a hollow cavity structure, and a labyrinthine radiation-blocking structure is created at the joints. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a modulator ray shielding device according to an embodiment of the present invention;

[0029] Figure 2 This is an assembly diagram of the lower shielding module, the middle shielding module, and the upper shielding module provided in an embodiment of the present invention;

[0030] Figure 3 This is a cross-sectional schematic diagram of a modulator ray shielding device provided in an embodiment of the present invention;

[0031] Figure 4 yes Figure 3 Enlarged structural diagram at point A in the middle;

[0032] Figure 5 This is an exploded structural diagram of the lower shield module in one embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the shielding module provided in an embodiment of the present invention;

[0034] Figure 7 yes Figure 3 Enlarged structural diagram at point B;

[0035] Figure 8 This is a schematic diagram of the structure of the upper shielding module provided in an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the metal partition provided in an embodiment of the present invention.

[0037] In the figure: Lower shielding module 10; base support 11; bottom cover 12; bottom partition 13; bottom step cover 14; lateral mounting groove 141; bottom side partition 15; first bottom support arm 151; second bottom support arm 152; middle shielding module 20; shielding frame 21; middle retainer 211; shielding tube 22; middle side partition 23; first middle support arm 231; second middle support arm 232; first middle step 233; second middle step 234; first step 24; second step 25; upper shielding module 30; upper cover 31; top wall 311; top side wall 312; annular groove 313; upper cover 32; top partition 33; fastening edge 331; top side partition 34; metal partition 40. Detailed Implementation

[0038] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0040] like Figures 1 to 4 As shown, this embodiment provides a modulator radiation shielding device. The modulator radiation shielding device is used to house the modulator to block external radiation transmission and maintain the stable operation of the modulator. The modulator radiation shielding device includes a lower shielding module 10 stacked sequentially, at least two middle shielding modules 20 stacked one after another, and an upper shielding module 30. The lower shielding module 10, middle shielding module 20, and upper shielding module 30 together form a hollow radiation shielding cavity, which is used to house the modulator.

[0041] The middle shielding module 20 includes an annular shielding frame 21 and shielding tubes 22 distributed within the shielding frame 21. The middle shielding module 20 is stacked on top of the lower shielding module 10. The shielding tubes 22 guide the cables connected to the modulator into and out of the shielding device. Furthermore, the shielding tubes 22 have a hollow tubular structure, allowing airflow to flow along the holes in the shielding tubes 22 to create convection and maintain a stable temperature within the radiation shielding cavity. Preferably, the shielding tubes 22 are fitted onto opposite side walls of the middle shielding module 20 to create a thermal convection effect and improve airflow smoothness. Optionally, multiple shielding tubes 22 are distributed along the height of the modulator radiation shielding device. Optionally, the shielding tubes 22 at the top are not threaded with wires to allow gas flow. The shielding tubes 22 protrude tubularly from the surface of the middle shielding module 20, and their outlets are far from the radiation shielding cavity, allowing hot airflow generated around the modulator to escape, maintaining a stable internal temperature within the radiation shielding cavity and providing good radiation protection performance.

[0042] The intermediate shielding module 20 includes at least two modules, and the number of intermediate shielding modules 20 can be stacked layer by layer to adjust the overall height of the radiation shielding device, thereby constructing radiation shielding cavities of different heights. Optionally, the intermediate shielding module 20 has a ring structure, with its two ends respectively matched and overlapped. The bottom intermediate shielding module 20 is pressed against the lower shielding module 10 to seal the bottom of the tubular space formed by the intermediate shielding modules 20. The upper shielding module 30 is fastened to the top intermediate shielding module 20 to seal the top of the tubular space formed by the intermediate shielding modules 20, thus constructing a sealed radiation shielding cavity.

[0043] In one embodiment, the joints of the middle shielding module 20 and the lower shielding module 10 are interlocked, and the joints of the middle shielding module 20 and the upper shielding module 30 are also interlocked. Each of the lower shielding module 10, the middle shielding module 20, and the upper shielding module 30 contains a metal partition 40 that blocks radiation penetration, and the metal partitions 40 at least partially overlap at their interlocking joints. The metal partitions 40 are configured as metal plates with good radiation blocking effects; for example, they are made of lead, tungsten, or other materials with high radiation blocking effects. It is worth noting that the shielding tube 22 is a tubular structure made of the same material as the metal partitions 40, and also has the function of blocking radiation transmission.

[0044] Metal partitions 40 are distributed within the walls of the lower shielding module 10, the middle shielding module 20, and the upper shielding module 30, forming a closed radiation shielding cavity that completely isolates the path of external radiation transmission to the modulator. The metal partitions 40 are at least partially overlapped at their interlocking points to prevent the formation of gaps that allow radiation transmission at the joints.

[0045] In an optional embodiment, the metal partition 40 can be configured as a plug-in interlocking structure of a boss and a groove. For example, at least one insertion groove is provided at one end of the middle shielding module 20, and a corresponding matching insertion boss is provided at the other end. The lower shielding module 10 is provided with a matching insertion boss, and the upper shielding module 30 is provided with a matching insertion groove. The bottom middle shielding module 20 is engaged with the matching insertion boss of the lower shielding module 10 through the insertion groove, and the upper shielding module is engaged with the insertion boss of the top middle shielding module 20, thereby forming an interlocking connection. Furthermore, the interlocking portion forms a corridor-like labyrinth structure to block the radiation transmission path.

[0046] In another alternative embodiment, the metal partition 40 can be configured as a complementary stepped interlocking structure. For example, at least one stepped groove is provided at one end of the middle shielding module 20, and a corresponding matching stepped protrusion is provided at the other end. The lower shielding module 10 is provided with a matching stepped protrusion, and the upper shielding module 30 is provided with a matching stepped groove. The bottom middle shielding module 20 is engaged with the matching stepped protrusion of the lower shielding module 10 through the stepped groove, and the upper shielding module is engaged with the stepped protrusion of the top middle shielding module 20, thereby forming a stepped interlocking connection. The stepped interlocking forms a stepped labyrinth structure to block the radiation transmission path.

[0047] Preferably, the overlapping portion between the middle shielding module 20 and the lower shielding module 10 has a complementary stepped structure, and the middle shielding module 20 and the lower shielding module 10 abut against each other to facilitate assembly and connection.

[0048] like Figures 3 to 5 As shown, in one embodiment, the lower shielding module 10 includes a base support 11 and a base cover 12 that cooperate with each other. The base support 11 and the base cover 12 form a hollow, defined space for defining the metal partition 40. The metal partition 40 includes at least one bottom partition 13, which is laid on the base support 11. The base cover 12 covers the bottom partition 13 and is connected to the base support 11. The base cover 12 and the base support 11 together define the bottom partition 13 and support and connect it. Optionally, the bottom partition 13 can be configured as one or more laid flat. When the area of ​​the bottom partition 13 is large and difficult to transport, the bottom partition 13 is composed of at least two pieces. The mating surfaces of two adjacent bottom partitions 13 are configured as overlapping and complementary stepped structures to form a stepped labyrinth structure. Preferably, two, four, or eight handles are provided on the outside of the lower shielding module 10, the middle shielding module 20, and the upper shielding module 30 to facilitate lifting and moving by multiple people or by using handling equipment.

[0049] The edges of the bottom cover 12 and the bottom partition 13 form a stepped structure. The middle shielding module 20 is pressed against at least one step of the bottom cover 12 to form a stepped labyrinth structure at the overlapping part. The bottom cover 12 separates the bottom partition 13 and the middle shielding module 20, and the middle shielding module 20 presses the bottom cover 12 and the bottom partition 13 against the bottom support 11, thereby maintaining the tightness of the connection. Preferably, the middle shielding module 20 uses its own weight to press the lower shielding module 10, reducing fasteners and simplifying the connection mechanism, thereby forming a quick-assembly and disassembly structure.

[0050] In an optional embodiment, the bottom cover 12 and the bottom partition 13 form a plate-like structure, with the stepped structure extending outward in a stepped manner from the edge of the bottom cover 12 towards the edge of the bottom support 11. The middle shielding module 20 is snapped into and pressed against the stepped structure at the edge of the bottom cover 12 from the top, forming a fence-like stepped maze structure, which is easy to assemble. The stepped maze structure is located in the bottom area of ​​the lower shielding module 10 to block the path of radiation transmission.

[0051] Based on the above embodiments, further optimizations are made, wherein the lower shielding module 10 forms a recessed mounting space for mounting and fixing the bottom of the modulator. The overall height of the lower shielding module 10 is small, making it easy to adjust the mounting position of the modulator. Then, the middle shielding modules 20 are snapped into the lower shielding module 10 one by one, wherein the modulator's leads can be inserted one by one into the shielding tube 22, making assembly and wiring convenient.

[0052] Preferably, the lower shielding module 10 further includes a bottom step cover plate 14 fixed to the base support 11, with a lateral mounting groove 141 formed between the bottom step cover plate 14 and the base support 11. The bottom step cover plate 14 is an annular thin-walled structural member, and its edge is fixedly connected to the edge of the base support 11. Preferably, the edge of the bottom step cover plate 14 and the edge of the base support 11 are welded together. Optionally, the bottom step cover plate 14 and the base support 11 are an integral structure, forming a groove-shaped frame structure by bending and welding through sheet metal processing. The bottom step cover plate 14 constitutes a sidewall surrounding the base support 11, and a lateral mounting groove 141 is formed in the lateral direction of the bottom step cover plate 14 and the base support 11. This lateral mounting groove 141 is used to accommodate the metal partition 40 to construct a blocking layer that blocks the penetration of rays. At the same time, the bottom step cover plate 14 and the base support 11 provide support and limit for the metal partition 40, preventing the metal partition 40 from shifting, so that the joint position structure that blocks the transmission of rays is controllable.

[0053] The metal partition 40 includes at least two bottom side partitions 15, which are embedded in lateral mounting grooves 141. The bottom side partitions 15, embedded and confined in the lateral mounting grooves 141, are supported and confined by the supporting force of the bottom step cover 14, maintaining a uniform installation position. The bottom side partitions 15 are pressed against the stepped surface of the bottom cover 12, with the inner surface of the bottom side partitions 15 facing the installation space. The bottom of the bottom side partitions 15 is configured with a matching stepped structure. For example, if the bottom cover 12 has two stepped surfaces, then the bottom side partitions 15 have complementary two stepped surfaces. Alternatively, if the bottom cover 12 has three stepped surfaces, then the bottom side partitions 15 have complementary three stepped surfaces.

[0054] The intermediate shielding module 20 is pressed together with the stepped structure of the bottom step cover plate 14. The bottom side partition 15 provides support to the bottom step cover plate 14 and also transfers the gravity of the intermediate shielding module 20 to the bottom cover 12 and the bottom partition plate 13, resulting in a high degree of tightness in the pressing. The top of the bottom side partition plate 15 is configured to adapt to the stepped structure of the bottom step cover plate 14. In the direction perpendicular to the pressing, the stepped part of the bottom side partition plate 15 overlaps with the metal partition plate 40 of the intermediate shielding module 20 to form a stepped labyrinth structure that blocks multiple rays, resulting in a good blocking effect.

[0055] The bottom side partition 15 can be made of lead plate, resulting in a large overall weight. Two or more bottom side partitions 15 are used to reduce handling difficulty. Preferably, the joints between adjacent bottom side partitions 15 are configured as complementary stepped maze structures or interlocking corridor-style maze structures, allowing for separate handling while also being able to be assembled into a single structure.

[0056] Preferably, the bottom side partition 15 comprises four pieces, which are sequentially and alternately connected to form a ring, with the ends of adjacent bottom side partitions 15 forming complementary stepped structures. Optionally, the bottom side partitions 15 are combined to form a rectangular frame structure, with each bottom side partition 15 being a flat plate structure, wherein the overlapping part is located at the corner of the bottom step cover plate 14. Preferably, the bottom side partition 15 includes intersecting first bottom support arm 151 and second bottom support arm 152, the ends of which are provided with stepped structures. These steps are combined to allow adjacent bottom side partitions 15 to overlap and match each other, thereby forming a complementary stepped structure. Setting the overlapping part of the bottom side partition 15 at the straight edge improves the processing convenience of the bottom side partition 15, and the overlapping position has high connection tightness and small overall twist.

[0057] like Figure 4 , Figure 6 and Figure 9 As shown, in one embodiment, the middle shielding module 20 includes a thin-walled, annular middle retainer 211, and the metal partition 40 includes at least two middle side partitions 23 assembled into an annulus and embedded in the middle retainer 211. The middle retainer 211 is a stable annular structure located on the outside of the middle shielding module 20, thereby defining and supporting the mounting positions of the at least two middle side partitions 23. Optionally, the middle retainer 211 is made of stainless steel, and the middle side partitions 23 are made of lead or tungsten plates.

[0058] The two ends of the middle shielding module 20 respectively form a first step portion 24 and a second step portion 25. Optionally, the first step portion 24 is a concave step structure, and the second step portion 25 is a convex step structure. When two adjacent middle shielding modules 20 are stacked on top of each other, the first step portion 24 is interlocked with the second step portion 25 of the other stacked middle shielding module 20. When the lowest layer of the middle shielding module 20 is stacked on the lower shielding module 10, the first step portion 24 is interlocked with the lower shielding module 10. Specifically, the first step portion 24 is complementaryly interlocked with the step portion of the bottom partition 15.

[0059] The central retainer 211 can be configured as an annular tubular structure to form the outer peripheral wall defining the central side partition 23. In an optional embodiment, one end of the central retainer 211 is provided as a central step portion, and the central side partition 23 is inserted into the inner side wall of the matching central step portion at the other end of the central retainer 211. Specifically, one end of the central retainer 211 is provided with an inwardly recessed central step portion, and the other end of the central retainer 211 is provided as a tubular structure. The central side partition 23 is inserted along one end of the central retainer 211 to abut against the central step portion, resulting in high assembly precision. The central side partition 23 and the central retainer 211 are mutually tensioned and constrained, which facilitates the assembly and processing of the central side partition 23 while maintaining stable structural characteristics.

[0060] The middle partition 23 includes two or more, and the joint of two adjacent middle partitions 23 has a complementary stepped structure. Preferably, the middle partition 23 includes four pieces, which are sequentially and alternately connected to form a ring, and the ends of two adjacent middle partitions 23 have a complementary stepped structure. Optionally, the middle partitions 23 are combined to form a rectangular frame structure, and each middle partition 23 has a flat plate structure, wherein the overlapping part is located at the corner of the bottom step cover plate 14.

[0061] Preferably, the middle partition 23 includes intersecting first middle support arm 231 and second middle support arm 232. The end of the first middle support arm 231 is provided with a first middle step portion 233, and the end of the second middle support arm 232 is provided with a second middle step portion 234. The first middle step portions 233 and the second middle step portions 234 of adjacent middle partitions 23 overlap and match each other, thereby forming a complementary step structure. Setting the overlapping part of the middle partition 23 at the straight edge can improve the processing convenience of the middle partition 23, and the overlapping position has a high connection tightness and small overall twist.

[0062] like Figure 3 , Figure 7 and Figure 8 As shown, the upper shielding module 30 is used to close the top opening of the space formed by stacking multiple middle shielding modules 20, thereby forming a closed radiation shielding cavity. Optionally, the upper shielding module 30 can be configured as a single piece of metal partition 40, such as a single piece of lead plate, tungsten plate, or other sheet material, covering the top opening of the space formed by stacking the middle shielding modules 20. Optionally, the metal partition 40 is composed of multiple pieces, which are assembled into a single unit through a connecting structure.

[0063] In one embodiment, the upper shielding module 30 includes an upper cover 31 covering the middle shielding module 20, and the metal partition 40 includes a top partition 33 covering the upper cover 31 and a top side partition 34 embedded in the upper cover 31. The top side partition 34 and the upper cover 31 are fastened to the middle shielding module 20, and the area of ​​the top partition 33 is larger than the area of ​​the inner hole region of the middle shielding module 20. The top side partition 34 is arranged around the top partition 33, and the projection of the top side partition 34 onto the plane where the top partition 33 is located coincides with the edge of the top partition 33. Furthermore, the upper cover 31 defines and accommodates the top partition 33 and the top side partition 34 to combine the top side partition 34 and the top partition 33 into a whole. The upper cover 31 is provided with a cover structure, including a top wall 311 and a top side wall 312 surrounding the top wall 311. A top partition 33 is pressed against the top wall 311, and a top side partition 34 is embedded in the top side wall 312. Preferably, the top wall 311 is partially recessed to form a top groove, and the top partition 33 is confined within the top groove.

[0064] The ends of the top sidewall 312 and the top side partition 34 form a stepped structure to be fitted into the topmost middle shielding module 20. The structure of the fitting part between the upper shielding module 30 and the middle shielding module 20 is basically the same as the structure of the fitting part between the lower shielding module 10 and the middle shielding module 20. The structure of the top side partition 34 is basically the same as the structure of the middle side partition 23, which can be understood by reference, and will not be described again here.

[0065] In an optional embodiment, the top partition 33 is fastened to the upper cover 31 to define the upper cover 31 and the top side partition 34. The intersection of the edge of the top wall 311 and the top side wall 312 forms an annular groove 313. The periphery of the top partition 33 protrudes to form a fastening edge 331, which is fastened into the annular groove 313 to form an overall covering structure. The top partition 33 further strengthens the positional definition of the top side partition 34 and also forms a labyrinth-shaped structure between the top partition 33 and the top side partition 34. Optionally, the top partition 33 can be provided as two or more pieces, with an interlocking structure between adjacent top partitions 33. This interlocking structure is similar to the interlocking structure of the bottom partition 13 and can be understood with reference to the interlocking form of the bottom partition 13, and will not be described again.

[0066] In an optional embodiment, the upper shielding module 30 further includes an upper cover 32 that covers the top partition 33, with the lateral edges of the upper cover 32 flush with the lateral edges of the upper cover 31. The upper cover 32 is a thin-walled bent or stretched metal component. The upper cover 32 covers the top partition 33, and its edges bend and extend to the upper cover 31 to make the edge surfaces substantially flush, improving the ease of handling and use. Meanwhile, the top partition 33, located between the upper cover 32 and the upper cover 31, provides a stable space and facilitates easy assembly and disassembly.

[0067] For illustrative purposes, the foregoing description uses specific names to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that specific details are not required to practice the embodiments. Therefore, for purposes of illustration and description, the foregoing description of specific embodiments herein is presented. These descriptions are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. It will be apparent to those skilled in the art that many modifications and variations are possible in light of the teachings above. Furthermore, when used herein to refer to the location of components, the terms above and below, or their synonyms, do not necessarily refer to absolute locations relative to external references, but rather to the relative locations of the components with reference to the accompanying drawings.

[0068] Furthermore, the foregoing figures and descriptions include numerous concepts and features that can be combined in various ways to achieve a variety of beneficial effects and advantages. Therefore, features, components, elements, and / or concepts from various different figures can be combined to produce embodiments or implementations that are not necessarily shown or described in this specification. Moreover, in any particular embodiment and / or implementation, not all features, components, elements, and / or concepts shown in the specific figures or descriptions are necessarily required. It should be understood that such embodiments and / or implementations fall within the scope of this specification.

Claims

1. A modulator ray shielding device for housing a modulator, characterized in that, The modulator radiation shielding device includes: Lower shielding module; At least two intermediate shielding modules are stacked one after another. The intermediate shielding module includes an annular shielding frame and shielding tubes distributed in the shielding frame. The intermediate shielding module is stacked on the lower shielding module, and the joint of the intermediate shielding module and the lower shielding module is interlocked with each other. The upper shielding module is fastened to the middle shielding module, and the joints between the middle shielding module and the upper shielding module are interlocked; wherein, The walls of the lower shielding module, the middle shielding module, and the upper shielding module all contain metal partitions that block the penetration of rays, and the metal partitions overlap at least partially at the interlocking parts. The middle shielding module includes a thin-walled, annular middle retainer. The metal partition includes at least two middle side partitions that are combined into an annulus and embedded in the middle retainer. The two ends of the middle shielding module respectively form a first step portion and a second step portion. The first step portion is used to interlock with the lower shielding module; or, the first step portion is used to interlock with the second step portion of another middle shielding module that is superimposed on each other.

2. The modulator radiation shielding device according to claim 1, characterized in that, The overlapping portion between the middle shielding module and the lower shielding module has a complementary stepped structure.

3. The modulator radiation shielding device according to claim 2, characterized in that, The lower shield module includes a base support and a bottom cover that cooperate with each other. The metal partition includes at least one bottom partition. The bottom partition is laid on the base support. The bottom cover is placed on the bottom partition and connected to the base support. The edges of the bottom cover and the bottom partition form a stepped structure. The middle shield module is pressed against at least one stepped structure of the bottom cover.

4. The modulator radiation shielding device according to claim 3, characterized in that, The lower shield module also includes a bottom step cover plate fixed to the base, and a lateral mounting groove is formed between the bottom step cover plate and the base. The metal partition includes at least two bottom side partitions, which are embedded in the lateral mounting groove and pressed against the step surface of the base cover. The middle shield module is matched and pressed against the step structure of the bottom step cover plate.

5. The modulator radiation shielding device according to claim 4, characterized in that, The bottom side partition comprises four pieces, which are connected alternately in sequence to form a ring, and the ends of two adjacent bottom side partitions have complementary stepped structures.

6. The modulator radiation shielding device according to claim 1, characterized in that, One end of the central retainer is configured as a central step portion, and the central side partition is inserted into the other end of the central retainer to abut against the inner sidewall of the matching central step portion.

7. The modulator radiation shielding device according to claim 1, characterized in that, The joint between two adjacent middle partitions has a complementary stepped structure.

8. The modulator radiation shielding device according to claim 1, characterized in that, The modulator radiation shielding device forms a hollow radiation shielding cavity, and the shielding tube is assembled on the opposite side walls of the middle shielding module.

9. The modulator radiation shielding device according to claim 1, characterized in that, The upper shielding module includes an upper cover that covers the middle shielding module. The metal partition includes a top partition that covers the upper cover and a top side partition that is embedded in the upper cover. The top side partition and the upper cover are fastened to the middle shielding module. The area of ​​the top partition is larger than the area of ​​the inner hole region of the middle shielding module.

10. The modulator ray shielding device according to claim 9, characterized in that, The top partition is fastened to the upper cover.

11. The modulator radiation shielding device according to claim 9, characterized in that, The upper shielding module also includes an upper cover that covers the top partition, with the lateral edge of the upper cover flush with the lateral edge of the upper cover.

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