Shielding structure and installation method of electron accelerator

Abstract

The present invention relates to a shielding structure and an installation method of an electron accelerator, wherein the shielding structure comprises a shielding room, the shielding room has a shielding cavity for shielding radiation, a first floor is arranged in the shielding cavity, the first floor divides the shielding cavity into a first cavity and a second cavity arranged in sequence from bottom to top in the vertical direction, a mounting groove connected to the second cavity is arranged on the first floor, a mounting hole penetrating the first floor is arranged on the bottom wall of the mounting groove, the mounting hole is used for allowing a portion of the lead-out window to extend downward into the first cavity, the second cavity and the mounting groove are used to accommodate an accelerator body and a scanning box, and the mounting groove is used to install the accelerator body. The shielding structure provided by the present invention locates a portion of the lead-out window in the first cavity, thereby performing radiation processing on a processed object in the first cavity, and locates the scanning box and the accelerator body in the second cavity and the accommodating groove, thereby preventing the radiation in the first cavity from affecting the coil of the scanning box.

Description

Technical Field

[0001] The invention relates to the technical field of electron accelerators, and in particular to a shielding structure and an installation method of an electron accelerator. Background Art

[0002] Radiation processing refers to the process of using gamma rays and electron beams generated by accelerators to irradiate the object to be processed to improve its quality or performance. Currently, CELV electron accelerators are often used for radiation processing. When installing electron accelerators, civil engineering is first carried out to set up shielding structures to shield the radiation generated by the electron accelerator. Figure 1 As shown, the existing shielding structure is a two-layer structure, the upper layer is equipped with the main body 110 of the electron accelerator 100, and the lower layer is equipped with the scanning box 120 of the electron accelerator 100 and the lead-out window 130 connected to the scanning box 120. The scanning box 120 is installed on the ceiling of the lower layer and is connected to the accelerator main body 110 through the floor. Installing the scanning box 120 on the ceiling of the lower layer is not only inconvenient to inspect and repair the scanning box 120, but also the lower layer of the shielding structure is the main irradiation area, and the ozone, nitrogen oxides and other harmful gases generated by the irradiation production of the electron accelerator 100 can easily damage the coil of the scanning box 120. Summary of the invention

[0003] Based on this, it is necessary to provide a shielding structure to address the problem that the scanning box is easily exposed to radiation.

[0004] A shielding structure for shielding radiation generated by an electron accelerator, wherein the electron accelerator comprises an accelerator body, a scanning box and an extraction window arranged in sequence from top to bottom in a vertical direction, wherein the extraction window is connected to the accelerator body through the scanning box, and the shielding structure comprises:

[0005] A shielding room, having a shielding cavity for shielding radiation, wherein a first floor is arranged in the shielding cavity, wherein the first floor divides the shielding cavity into a first chamber and a second chamber arranged in sequence from bottom to top in a vertical direction, wherein a mounting groove connected to the second chamber is provided on the first floor, wherein a mounting hole penetrating the first floor is provided on the bottom wall of the mounting groove, wherein the mounting hole is used for allowing a portion of the lead-out window to extend downward into the first chamber, wherein the second chamber and the mounting groove are used for accommodating the accelerator body and the scanning box, and the mounting groove is used for installing the accelerator body.

[0006] In one of the embodiments, a reinforcement member is further provided on the bottom wall, and the reinforcement member is used to connect the accelerator body and the bottom wall.

[0007] In one embodiment, the reinforcement is made of metal material and is in a plate shape, and the reinforcement is used for welding to the accelerator body.

[0008] In one of the embodiments, it further includes a radiation protection member buried in the first floor slab, wherein the radiation protection member is used to reduce radiation between the first chamber and the second chamber.

[0009] In one embodiment, the radiation protection member is a lead plate, which is distributed around the circumference of the mounting hole and extends radially along the mounting hole.

[0010] In one embodiment, a second floor is provided in the second chamber, and the shielding structure further comprises a vertical wall connected to the top of the second floor, and the vertical wall is used to cover the top of the accelerator body;

[0011] Wherein, the radial dimension of the vertical wall along the mounting hole is smaller than the dimension of the second floor slab, so that the second floor slab partially forms a maintenance platform.

[0012] In one embodiment, the vertical wall includes a fixed portion and a movable portion, the fixed portion is connected to the second floor slab and is enclosed to form a third chamber having an opening and connected to the second chamber, the third chamber is used to accommodate the top end of the accelerator body, and the movable portion is used to seal the opening.

[0013] In one embodiment, the movable part includes a double layer of stacked steel plates, each layer of the steel plates is provided with lifting holes for connecting to a crane, and any of the lifting holes on one layer of the steel plates is staggered with any of the lifting holes on another layer of the steel plates.

[0014] The present invention also provides a method for installing an electron accelerator, which is used to install the electron accelerator in the shielding structure described above. The method for installing the accelerator comprises the following steps:

[0015] S1. Install the outlet window on the end surface of the first floor plate close to the first chamber, and the outlet window part passes through the installation hole and is located in the installation groove;

[0016] S2. The accelerator body and the scanning box are arranged in the second chamber, and the accelerator body is connected to the bottom wall of the mounting groove, and the lead-out window and the accelerator body are connected through the scanning box.

[0017] In one of the embodiments, when the lead-out window and the scanning box are installed, the radiation protection member buried in the first floor slab is located between the lead-out window and the scanning box.

[0018] Beneficial effects of the present invention:

[0019] The shielding structure is provided with a first floor in the shielding chamber of the shielding room, thereby dividing the shielding chamber into a first chamber and a second chamber. The shielding chamber can shield radiation, that is, both the first chamber and the second chamber have a shielding function and can shield the radiation generated by the electron accelerator. The first chamber and the second chamber are arranged in sequence from bottom to top along the vertical direction. The first chamber is used to accommodate a part of the lead-out window. The radiation generated by the accelerator body is emitted into the first chamber through the scanning window, thereby processing the object to be processed in the first chamber. The second chamber and the mounting groove are used to accommodate the accelerator body and the scanning box, and the scanning box is located in the second chamber. A first floor is provided between the second chamber and the first chamber, thereby reducing the influence of the radiation in the first chamber on the coil of the scanning box, and protecting the accelerator body and the scanning box. A mounting groove connected to the second chamber is provided on the first floor, that is, a mounting groove is provided on the bottom cavity wall of the second chamber, and the mounting groove is used to install the accelerator body, so that the accelerator body is located in the second chamber. A mounting hole penetrating the first floor is provided on the bottom wall of the mounting groove, that is, the first chamber and the second chamber are connected through the mounting hole, and the mounting hole is used for the lead-out window to pass through, so that part of the lead-out window extends into the second chamber and is connected to the scanning box, and part of it extends downward from the mounting hole into the first chamber, so as to facilitate the emission of radiation. The shielding body structure provided by the present invention locates part of the lead-out window in the first chamber, so that the processed object in the first chamber is subjected to radiation processing, and the scanning box and the accelerator body are both located in the second chamber and the mounting groove, so as to prevent the radiation in the first chamber from affecting the coil of the scanning box. Compared with the existing installation of the accelerator body on the first floor, the present invention arranges the mounting groove on the first floor, which not only accommodates the scanning box, but also reduces the installation height of the accelerator body, reduces the height of the second chamber in the vertical direction, and reduces the production cost.

[0020] The installation method of the electron accelerator is as follows: during installation, the lead-out window is first connected to the lower end of the first floor, that is, the end surface of the first floor close to the first chamber, and the lead-out window extends through the installation hole into the installation slot to facilitate connection with the scanning box, and then the accelerator body and the scanning box are placed in the second chamber, and then the accelerator body is connected to the bottom wall of the installation slot, so that the accelerator body is installed, and finally the lead-out window and the accelerator body are connected through the scanning box to achieve the installation of the electron accelerator. During installation, the accelerator body is partially located in the installation slot, which reduces the height of the accelerator body in the second chamber, reduces the manufacturing cost of the shielding structure, and the scanning box is also located in the second chamber, which reduces the influence of radiation in the first chamber on the coil of the scanning box. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a shielding body structure in the prior art;

[0022] Figure 2 A schematic structural diagram of a shielding structure provided by an embodiment of the present invention from a first viewing angle;

[0023] Figure 3 A schematic structural diagram of a shielding structure provided by an embodiment of the present invention from a first viewing angle;

[0024] Figure 4 A schematic diagram of the structure of the second chamber provided in an embodiment of the present invention;

[0025] Figure 5 A schematic structural diagram of a vertical wall provided in an embodiment of the present invention.

[0026] In the figure:

[0027] 100, electron accelerator; 110, accelerator body; 120, scanning box; 130, lead-out window;

[0028] 200, shielding room; 210, first floor; 220, first chamber; 230, second chamber; 240, second floor; 241, maintenance platform;

[0029] 300, mounting slot;

[0030] 400, mounting hole;

[0031] 500, reinforcement;

[0032] 600. Radiation protection parts;

[0033] 700, vertical wall; 710, fixed part; 711, third chamber; 720, movable part. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0040] like Figure 1 As shown, the existing shielding structure is a two-layer structure, the upper layer is equipped with the main body 110 of the electron accelerator 100, and the lower layer is equipped with the scanning box 120 of the electron accelerator 100 and the lead-out window 130 connected to the scanning box 120. The scanning box 120 is installed on the ceiling of the lower layer and is connected to the accelerator main body 110 through the floor. Installing the scanning box 120 on the ceiling of the lower layer is not only inconvenient to inspect and repair the scanning box 120, but also the lower layer of the shielding structure is the main irradiation area, and the ozone, nitrogen oxides and other harmful gases generated by the irradiation production of the electron accelerator 100 can easily damage the coil of the scanning box 120.

[0041] In order to reduce the radiation received by the scanning box 120, the embodiment of the present invention provides a shielding structure, such as Figure 2 and Figure 3 The shielding structure is used to shield the radiation generated by the electron accelerator 100. The electron accelerator 100 includes an accelerator body 110, a scanning box 120 and an extraction window 130 arranged in sequence from top to bottom in the vertical direction. The extraction window 130 is connected to the accelerator body 110 through the scanning box 120. The shielding structure includes a shielding room 200. The shielding room 200 has a shielding cavity for shielding radiation. A first floor 210 is provided in the shielding cavity. The first floor 210 divides the shielding cavity into a shielding cavity from the first floor 210 in the vertical direction. The first chamber 220 and the second chamber 230 are arranged in sequence from bottom to top. The first floor plate 210 is provided with a mounting groove 300 connected to the second chamber 230. The bottom wall of the mounting groove 300 is provided with a mounting hole 400 that penetrates the first floor plate 210. The mounting hole 400 is used for allowing a portion of the lead-out window 130 to extend downward into the first chamber 220. The second chamber 230 and the mounting groove 300 are used to accommodate the accelerator body 110 and the scanning box 120, and the mounting groove 300 is used to install the accelerator body 110.

[0042] The above-mentioned shielding body structure is provided with a first floor 210 in the shielding cavity of the shielding room 200, thereby dividing the shielding cavity into a first cavity 220 and a second cavity 230. The shielding room 200 can shield radiation, that is, the first cavity 220 and the second cavity 230 both have a shielding function and can shield the radiation generated by the electron accelerator 100. The first chamber 220 and the second chamber 230 are arranged in sequence from bottom to top in the vertical direction. The first chamber 220 is used to accommodate a part of the lead-out window 130. The radiation generated by the accelerator body 110 is emitted into the first chamber 220 through the scanning window, so as to process the objects to be processed in the first chamber 220. The second chamber 230 and the mounting groove 300 are used to accommodate the accelerator body 110 and the scanning box 120. The scanning box 120 is located in the second chamber 230. A first floor 210 is arranged between the second chamber 230 and the first chamber 220, so as to reduce the influence of the radiation in the first chamber 220 on the coil of the scanning box 120, and protect the accelerator body 110 and the scanning box 120. The first floor 210 is provided with a mounting groove 300 connected with the second chamber 230, that is, the mounting groove 300 is provided on the bottom wall of the second chamber 230. The mounting groove 300 is used to install the accelerator body 110, so that the accelerator body 110 is located in the second chamber 230. The installation of the mounting groove 300 reduces the installation height of the accelerator body 110 in the second chamber 230, reduces the building space of the second chamber 230, and saves costs. The bottom wall of the mounting groove 300 is provided with a mounting hole 400 that penetrates the first floor 210, that is, the first chamber 220 and the second chamber 230 are connected through the mounting hole 400. The mounting hole 400 is used for the lead-out window 130 to pass through, so that part of the lead-out window 130 extends into the second chamber 230 and is connected to the scanning box 120, and part of it extends downward from the mounting hole 400 to the first chamber 220, so as to emit radiation. The shielding structure provided by the present invention locates part of the lead-out window 130 in the first chamber 220, so that the object to be processed in the first chamber 220 is subjected to radiation processing, and the scanning box 120 and the accelerator body 110 are both located in the second chamber 230 and the mounting groove 300, so as to prevent the radiation in the first chamber 220 from affecting the coil of the scanning box 120. Compared with the existing method of installing the accelerator body 110 on the first floor 210, the present invention provides the mounting groove 300 on the first floor 210, which not only accommodates the scanning box 120, but also reduces the installation height of the accelerator body 110, reduces the height of the second chamber 230 in the vertical direction, and reduces the production cost.

[0043] like Figure 2 and Figure 3As shown, the shield structure further includes a reinforcement member 500 disposed on the bottom wall, and the reinforcement member 500 is used to connect the accelerator body 110 and the bottom wall. By disposing the reinforcement member 500, the accelerator body 110 and the bottom wall of the installation groove 300 are connected, thereby achieving the installation of the accelerator body 110.

[0044] Specifically, Figure 2 and Figure 3 As shown, the reinforcement member 500 is made of metal material and is in the shape of a plate, and the reinforcement member 500 is used to be welded to the accelerator body 110. The plate-shaped reinforcement member 500 is laid on the bottom wall of the installation groove 300, and then the accelerator body 110 and the reinforcement member 500 are welded by electric welding. More specifically, the reinforcement member 500 is a 30 mm thick steel plate, which is laid on the bottom wall of the installation groove 300, and a pillar is installed on the accelerator body 110, and the pillar is welded to the steel plate, thereby realizing the installation of the accelerator body 110.

[0045] It is understandable that, when the accelerator body 110 is installed, the scanning box 120 can be located in the mounting groove 300, or can partially extend out of the mounting groove 300, or can completely extend out of the mounting groove 300. The specific positional relationship between the scanning box 120 and the mounting groove 300 is determined by the depth of the mounting groove 300 and the distance between the scanning box 120 and the accelerator body 110.

[0046] It is understandable that the greater the depth of the mounting groove 300 is, the lower the height of the accelerator body 110 in the second chamber 230 is, thereby further reducing the building space of the second chamber 230 and further reducing the production cost.

[0047] Preferably, if Figure 2 and Figure 3 As shown, steps are provided on the side walls of the mounting groove 300 . When the depth of the mounting groove 300 is greater, steps are provided on the side walls of the mounting groove 300 to facilitate construction workers to stand, thereby facilitating operation of the accelerator body 110 and the scanning box 120 .

[0048] like Figure 2 and Figure 3 As shown, the shielding structure further includes a radiation shield 600 buried in the first floor 210, and the radiation shield 600 is used to reduce the radiation between the first chamber 220 and the second chamber 230. When the first floor 210 is constructed, the radiation shield 600 is buried in the first floor 210, thereby reducing the radiation between the first chamber 220 and the second chamber 230, reducing the radiation from the first chamber 220 to the second chamber 230, and reducing the radiation intensity received by the scanning box 120.

[0049] Specifically, Figure 2 and Figure 3As shown, the radiation protection member 600 is a lead plate, which is distributed around the circumference of the mounting hole 400 and extends in the radial direction of the mounting hole 400. When the first floor 210 is constructed, the lead plate is buried near the mounting hole 400 of the first floor 210, and the lead plate is distributed around the circumference of the mounting hole 400 and extends in the radial direction of the mounting hole 400, thereby enhancing the radiation protection performance of the first floor 210. More specifically, the lead plate is 20 mm thick.

[0050] It is understandable that, in some embodiments, a lead plate may be buried in the radiation protection weak area of ​​the first floor 210 to further enhance the radiation protection performance of the first floor 210. For example, the radiation protection weak area of ​​the first floor 210 is the area near the mounting hole 400.

[0051] like Figure 1 As shown, in the existing shielding structure, because the accelerator body 110 is heavy, a parking platform is set in the upper layer during installation, and the crane is located on the flat car platform to lift the accelerator body 110 to a preset position. Therefore, the upper layer of the existing shielding structure requires a large building space and a dedicated parking platform is required, which increases the production cost.

[0052] In order to save production costs, Figure 2 , Figure 3 as well as Figure 4 As shown, the shielding structure provided in this embodiment is provided with a second floor 240 in the second chamber 230, and the shielding structure also includes a vertical wall 700 connected to the top of the second floor 240, and the vertical wall 700 is used to cover the top of the accelerator body 110; wherein, the radial dimension of the vertical wall 700 along the mounting hole 400 is smaller than the dimension of the second floor 240, so that the second floor 240 partially forms a maintenance platform 241. By arranging the second floor 240 in the second chamber 230, the vertical wall 700 is connected to the top of the second floor 240, and the top of the accelerator body 110 is covered by the vertical wall 700, the accelerator body 110 is surrounded by the second chamber 230 and the vertical wall 700, and the radial dimension of the vertical wall 700 along the installation hole 400 is smaller than the dimension of the second floor 240, that is, the top portion of the second floor 240 is exposed. At this time, the exposed portion can form a maintenance platform 241 for construction workers and cranes to stand, which not only reduces the building space of the second chamber 230, but also reduces the production cost. When the accelerator body 110 is hoisted by a crane, it only needs to be placed on the maintenance platform 241, and there is no need to enter the second chamber 230, so that the accelerator body 110 can be hoisted.

[0053] It should be noted that a second floor plate 240 is disposed in the second chamber 230 , and the second floor plate 240 is parallel to the first floor plate 210 .

[0054] It should be noted that the vertical wall 700 is made of radiation-proof material, and the vertical wall 700 also has radiation-proof function.

[0055] like Figure 2 , Figure 3 and Figure 5 As shown, the vertical wall 700 includes a fixed portion 710 and a movable portion 720. The fixed portion 710 is connected to the second floor 240 and is surrounded by a third chamber 711 having an opening and communicating with the second chamber 230. The third chamber 711 is used to accommodate the top of the accelerator body 110, and the movable portion 720 is used to block the opening. When the accelerator body 110 in the second chamber 230 and the third chamber 711 needs to be operated, the opening can be opened by the movable portion 720, so as to facilitate the operation of the accelerator body 110.

[0056] Specifically, the movable part 720 includes a double layer of stacked steel plates, each of which is provided with a lifting hole for connecting with a crane, and any lifting hole on one layer of steel plates is staggered with any lifting hole on another layer of steel plates. When the movable part 720 needs to be removed, the lifting ring of the crane is connected to the lifting hole on one layer of steel plates, thereby moving one layer of steel plates, and repeating the operation until both layers of steel plates are removed. Any lifting hole on one layer of steel plates is staggered with any lifting hole on the other layer of steel plates, that is, in the arrangement direction of the two layers of steel plates, the lifting holes on the two layers of steel plates are not connected, so as to prevent the radiation in the second chamber 230 from leaking to the outside through the lifting holes.

[0057] Specifically, the lifting hole is a threaded hole, and the crane is provided with a lifting ring, which can be threadedly connected to the threaded hole to lift the steel plate.

[0058] Specifically, the movable part 720 is L-shaped, and a receiving groove is provided at the top of the third chamber 711, and part of the movable part 720 is located in the receiving groove. By providing the receiving groove, the two layers of steel plates of the movable part 720 are supported, and the movement of the movable part 720 is also restricted.

[0059] The embodiment of the present invention further provides a method for installing an electron accelerator, which is used to install the electron accelerator 100 in the above-mentioned shielding structure. The method for installing the accelerator includes the following steps:

[0060] S1, installing the outlet window 130 on the end surface of the first floor 210 close to the first chamber 220, and the outlet window 130 partially passes through the installation hole 400 and is located in the installation groove 300;

[0061] S2, placing the accelerator body 110 and the scanning box 120 in the second chamber 230, connecting the accelerator body 110 to the bottom wall of the mounting groove 300, and connecting the lead-out window 130 and the accelerator body 110 through the scanning box 120.

[0062] In the installation method of the electron accelerator, during installation, the lead-out window 130 is first connected to the lower end of the first floor 210, that is, to the end surface of the first floor 210 close to the first chamber 220, and the lead-out window 130 is partially extended into the installation groove 300 through the installation hole 400 to facilitate connection with the scanning box 120, and then the accelerator body 110 and the scanning box 120 are placed in the second chamber 230, and then the accelerator body 110 is connected to the bottom wall of the installation groove 300, so that the accelerator body 110 is installed, and finally the lead-out window 130 and the accelerator body 110 are connected through the scanning box 120 to achieve the installation of the electron accelerator 100. In the installation method of the electron accelerator provided in this embodiment, during installation, the accelerator body 110 is partially located in the installation groove 300, which reduces the height of the accelerator body 110 in the second chamber 230 and reduces the manufacturing cost of the shielding structure. In addition, the scanning box 120 is also located in the second chamber 230, which reduces the influence of the radiation in the first chamber 220 on the coil of the scanning box 120.

[0063] In some embodiments, when the lead-out window 130 and the scanning box 120 are installed, the radiation protection member 600 embedded in the first floor 210 is located between the lead-out window 130 and the scanning box 120. When the shielding structure is constructed, the radiation protection member 600 is pre-embedded in the first floor 210, and when the lead-out window 130 and the scanning box 120 are installed, the radiation protection member 600 embedded in the first floor 210 is located between the lead-out window 130 and the scanning box 120, thereby reducing the radiation between the first chamber 220 and the second chamber 230, reducing the radiation from the first chamber 220 to the second chamber 230, and reducing the radiation intensity received by the scanning box 120.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A shielding structure for shielding radiation generated by an electron accelerator (100), the electron accelerator (100) comprising an accelerator body (110), a scanning box (120), and an extraction window (130) arranged in sequence from top to bottom in a vertical direction, the extraction window (130) being connected to the accelerator body (110) via the scanning box (120), characterized in that: The shielding structure comprises: A shielding room (200) comprises a shielding cavity for shielding radiation, wherein a first floor plate (210) is arranged in the shielding cavity, wherein the first floor plate (210) divides the shielding cavity into a first chamber (220) and a second chamber (230) which are arranged in sequence from bottom to top in a vertical direction, wherein a mounting groove (300) which is in communication with the second chamber (230) is provided on the first floor plate (210), wherein a mounting hole (400) which passes through the first floor plate (210) is provided on the bottom wall of the mounting groove (300), wherein the mounting hole (400) is used for allowing a portion of the lead-out window (130) to extend downward into the first chamber (220), wherein the second chamber (230) and the mounting groove (300) are used for accommodating the accelerator body (110) and the scanning box (120), and wherein the mounting groove (300) is used for installing the accelerator body (110).

2. The shielding structure according to claim 1, characterized in that: It also includes a reinforcement member (500) arranged on the bottom wall, a support column is installed on the accelerator body (110), and the reinforcement member (500) is used to connect the accelerator body (110) and the bottom wall through the support column.

3. The shielding structure according to claim 2, characterized in that: The reinforcement member (500) is made of metal material and is in a plate shape. The reinforcement member (500) is used to be welded to the accelerator body (110) via a support.

4. The shielding structure according to claim 1, characterized in that: It also includes a radiation protection member (600) buried in the first floor slab (210), wherein the radiation protection member (600) is used to reduce radiation between the first chamber (220) and the second chamber (230).

5. The shielding structure according to claim 4, characterized in that: The radiation protection component (600) is a lead plate, which is distributed around the circumference of the mounting hole (400) and extends in the radial direction of the mounting hole (400).

6. The shielding structure according to claim 1, characterized in that: A second floor plate (240) is disposed in the second chamber (230), and the shielding structure further comprises a vertical wall (700) connected to the top of the second floor plate (240), wherein the vertical wall (700) is used to cover the top of the accelerator body (110); The radial dimension of the vertical wall (700) along the mounting hole (400) is smaller than the dimension of the second floor slab (240), so that a portion of the second floor slab (240) forms a maintenance platform (241).

7. The shielding structure according to claim 6, characterized in that: The vertical wall (700) comprises a fixed portion (710) and a movable portion (720); the fixed portion (710) is connected to the second floor slab (240) and is arranged to form a third chamber (711) having an opening and communicating with the second chamber (230); the third chamber (711) is used to accommodate the top end of the accelerator body (110); and the movable portion (720) is used to block the opening.

8. The shielding structure according to claim 7, characterized in that: The movable part (720) comprises a double layer of stacked steel plates, each layer of the steel plates being provided with a hoisting hole for connection with a crane, wherein any hoisting hole on one layer of the steel plates is staggered with any hoisting hole on another layer of the steel plates.

9. A method for installing an electron accelerator, for installing an electron accelerator (100) in the shielding structure according to any one of claims 1 to 8, characterized in that: The installation method of the accelerator comprises the following steps: S1. Installing the outlet window (130) on the end surface of the first floor plate (210) close to the first chamber (220), with the outlet window (130) partially passing through the installation hole (400) and being located in the installation groove (300); S2. The accelerator body (110) and the scanning box (120) are arranged in the second chamber (230), and the accelerator body (110) is connected to the bottom wall of the mounting groove (300), and the lead-out window (130) and the accelerator body (110) are connected via the scanning box (120).

10. The method for installing an electron accelerator according to claim 9, characterized in that: When the lead-out window (130) and the scanning box (120) are installed, the radiation protection member (600) buried in the first floor slab (210) is located between the lead-out window (130) and the scanning box (120).

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