Radiation shielding device, radiation shielding method and safety inspection apparatus

Abstract

A radiation shielding device (30), comprising a fixed shielding member (31) and a movable shielding assembly (32). The fixed shielding member (31) is suitable for being fixedly mounted and comprises a first movement space configured to allow a beam output component (11) of a radiation device (10) to be able to move within the first movement space to transmit rays to a tested object (70) after the beam output component reaches a target position. The movable shielding assembly (32) is suitable for being connected to the beam output component (11) and is configured to move relative to the fixed shielding member (31) as the beam output component (11) moves, wherein at any target position, the movable shielding assembly (32) and the fixed shielding member (31) match each other to form N shielding layers surrounding the beam output component (11), N being an integer greater than or equal to 1; and the N shielding layers are configured to shield radiation of the rays to the outside of the beam output direction of the beam output component (11).

Description

Radiation shielding device, radiation shielding method and security inspection equipment

[0001] This application claims priority to Chinese patent application No. 202310693415.0, filed on June 12, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of radiation shielding technology, and more particularly, to a radiation shielding device, a radiation shielding method, and security inspection equipment. Background Art

[0003] Radiation testing is widely used in industrial flaw detection, medicine, and safety inspections. Radiation testing typically involves using a radiation device to emit radiation, such as X-rays, gamma rays, or neutrons. Certain radiation penetrating the human body can produce certain biological effects. Excessive exposure, exceeding the permissible dose, can lead to certain radiation damage.

[0004] In the related art, radiation devices are typically equipped with a stationary, enclosed radiation shielding structure. For example, a movable beam-emitting component is enclosed in a stationary housing, with a shielding layer applied to the inner or outer walls. Alternatively, a shielding case is constructed to encompass the entire movement path of the beam-emitting component.

[0005] However, the radiation shielding structure used in related art, to allow the beam-emitting component to move within it, is bulky, increasing the overall weight of the radiation device. Furthermore, reducing the shielding structure to reduce weight can lead to the risk of radiation leakage and harm to the human body during the movement of the beam-emitting component.

[0006] Summary of the Invention

[0007] The present disclosure provides a radiation shielding device, a radiation shielding method and security inspection equipment that can reduce weight and prevent radiation leakage from harming the human body.

[0008] One aspect of an embodiment of the present disclosure provides a radiation shielding device, comprising: a fixed shielding member, which is suitable for being fixedly installed and includes a first movable space, the first movable space being configured to allow a beam-emitting component of the radiation device to move within the first movable space to send rays to an object to be detected after reaching a target position; and a movable shielding assembly, suitable for being connected to the beam-emitting component and configured to move relative to the fixed shielding member as the beam-emitting component moves, wherein, at any of the target positions, the movable shielding assembly cooperates with the fixed shielding member to form N layers of shielding layers surrounding the beam-emitting component, where N is an integer greater than or equal to 1; wherein the N layers of shielding layers are configured to shield radiation outside the beam-emitting direction of the beam-emitting component.

[0009] In some embodiments, the N shielding layers are configured to have M shielding layers on at least one side of the beam-emitting component in a circumferential direction, where M is an integer greater than or equal to 2, and M is less than or equal to N; wherein the gap defined between at least one shielding layer in the M shielding layers and any adjacent shielding layer includes a bending gap.

[0010] In some embodiments, the fixed shielding member includes: a first opening, the interior of which forms the first movable space to allow the beam-emitting component to move within the range of the first opening; a second opening, which is opposite to the first opening along the beam-emitting direction and is interconnected; wherein the movable shielding assembly and the first opening are arranged to allow the beam-emitting component to pass through the movable shielding assembly and the first opening in sequence along the beam-emitting direction.

[0011] In some embodiments, the fixed shielding member includes a first hollow three-dimensional frame, including: a first flat plate, including the first opening, the first flat plate being perpendicular to the beam output direction; a first side wall, perpendicular to the first flat plate, each first side wall being connected to the side of the first flat plate, and each first side wall being connected around to form the second opening; wherein the N-layer shielding layer includes the first flat plate and the first side wall.

[0012] In some embodiments, the movable shielding assembly includes: a first sliding member, suitable for connecting with the beam-emitting component, and the first sliding member is configured to be driven by the beam-emitting component to slide; wherein, the first sliding member and the first opening are arranged to allow the beam-emitting component to pass through the first sliding member and the first opening in sequence along the beam-emitting direction.

[0013] In some embodiments, the first sliding member being configured to be driven by the beam-emitting component to slide includes: the first sliding member being driven by the beam-emitting component to slide along the fixed shielding member.

[0014] In some embodiments, the first sliding member includes: a first shielding portion, perpendicular to the beam-emitting direction, the first shielding portion and the first opening being arranged to allow the beam-emitting component to pass through the first shielding portion and the first opening in sequence along the beam-emitting direction; a second shielding portion, perpendicular to the first shielding portion, connected to a first side of the first shielding portion; a third shielding portion, parallel to the second shielding portion, connected to a second side of the first shielding portion; wherein the N-layer shielding layer includes the first shielding portion, the second shielding portion, and the third shielding portion.

[0015] In some embodiments, the movable shielding assembly further includes: a second sliding member connected to the first sliding member, the second sliding member being configured to be driven by the first sliding member to slide; wherein the first sliding member, the second sliding member and the first opening are arranged to allow the beam-emitting component to pass through the first sliding member, the second sliding member and the first opening in sequence along the beam-emitting direction.

[0016] In some embodiments, the second sliding member includes: a first accommodating cavity, connected to the first sliding member; a second accommodating cavity, at least part of which is embedded in the first accommodating cavity, and the second accommodating cavity is movable in the first opening; wherein, the first sliding member, the second accommodating cavity and the first opening are arranged to allow the beam-emitting component to pass through the first sliding member, the second accommodating cavity and the first opening in sequence along the beam-emitting direction, and be movable in the second accommodating cavity.

[0017] In some embodiments, the second accommodating cavity includes: a second sidewall parallel to the beam-emitting direction, and a plurality of second sidewalls are interconnected to form the second accommodating cavity; wherein the N shielding layers include the second sidewall.

[0018] In some embodiments, the first accommodating cavity includes a second hollow three-dimensional frame, including: a second flat plate, including a third opening, the second flat plate is perpendicular to the beam output direction, and at least part of the cavity of the second accommodating cavity is embedded in the third opening; a third side wall, perpendicular to the second flat plate, each of the third side walls is connected to the side of the second flat plate, and each of the third side walls is connected around to form the first accommodating cavity; wherein the N-layer shielding layer includes the second flat plate and the third side wall.

[0019] In some embodiments, the radiation shielding device further includes: a guide rail assembly connected to the first sliding member and the second sliding member, such that the second sliding member can slide relative to the first sliding member along the guide rail assembly.

[0020] In some embodiments, the guide rail assembly includes: a first guide rail, mounted on a first side of the first sliding member and connected to one side of the first accommodating cavity; a second guide rail, parallel to the first guide rail, the second guide rail being mounted on a second side opposite to the first sliding member and connected to the other side opposite to the first accommodating cavity.

[0021] In some embodiments, the radiation shielding device further includes: a first slider movably mounted to the first guide rail and connected to one side of the first accommodating cavity; a second slider movably mounted to the second guide rail and connected to the other side opposite to the first accommodating cavity.

[0022] In some embodiments, the first sliding member is configured to slide driven by the beam-emitting component so that: when the second accommodating cavity is able to move within the first opening, the first slider moves synchronously with the first guide rail, and the second slider moves synchronously with the second guide rail; and / or when the second accommodating cavity is blocked by the edge of the first opening, the first slider moves relative to the first guide rail, and the second slider moves relative to the second guide rail, and the beam-emitting component moves within the second accommodating cavity.

[0023] Another aspect of an embodiment of the present disclosure provides a radiation shielding method, including: providing a fixed shielding structure having a first movable space; assembling a beam-emitting component of a radiation device so that the beam-emitting component can move within the first movable space to send rays after reaching a target position; providing a movable shielding assembly and connecting the movable shielding assembly to the beam-emitting component so that the movable shielding assembly moves relative to the fixed shielding structure as the beam-emitting component moves; cooperating the movable shielding assembly with the fixed shielding structure to form N shielding layers around the beam-emitting component at any of the target positions, where N is an integer greater than or equal to 1, and the N shielding layers shield the rays from radiating outside the beam-emitting direction of the beam-emitting component.

[0024] Another aspect of an embodiment of the present disclosure provides a security inspection device, including: a radiation device, which has a beam-emitting component that defines a beam-emitting port, and the beam-emitting component is configured to send radiation at a target position to scan an object to be inspected; and a radiation shielding device as described above, which is configured to shield the radiation from radiating outside the beam-emitting direction of the beam-emitting component. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above contents and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0026] FIG1 schematically shows an application scenario diagram of a security inspection device according to an embodiment of the present disclosure;

[0027] FIG2 schematically shows a structural diagram of a radiation shielding device according to an embodiment of the present disclosure;

[0028] FIG3 schematically illustrates an exploded view of the radiation shielding device in FIG2 according to an embodiment of the present disclosure;

[0029] FIG4 schematically shows a cross-sectional view along line AA′ in FIG2 according to an embodiment of the present disclosure;

[0030] FIG5( a ) schematically shows a structural diagram of a fixed shielding member according to an embodiment of the present disclosure;

[0031] FIG5( b ) schematically shows a structural diagram of the fixed shielding member in FIG5( a ) from another perspective according to an embodiment of the present disclosure;

[0032] FIG6 schematically shows a structural diagram of a first sliding member according to an embodiment of the present disclosure;

[0033] FIG7 schematically shows a structural diagram of the first sliding member in FIG6 from another perspective according to an embodiment of the present disclosure;

[0034] FIG8 schematically shows a structural diagram of a second sliding member according to an embodiment of the present disclosure;

[0035] FIG9 schematically shows a structural diagram of the second sliding member in FIG8 from another perspective according to an embodiment of the present disclosure; and

[0036] FIG10 schematically shows a flow chart of a radiation shielding method according to an embodiment of the present disclosure.

[0037] In the above drawings, the meanings of the reference numerals are as follows:

[0038] Relative position and motion relationship between the sliding member and the fixed member 20, frame; 40, carrying mechanism; 50, controller; 60, computer; 70, object to be detected; 10, radiation device; 11, beam-emitting component; 111, beam-emitting port; 30, radiation shielding device; 31, fixed shielding member; 311, first opening; 312, second opening; 500, first hollow three-dimensional frame; 510, first flat plate; 520, first side wall; 32, movable shielding assembly; 321, first sliding member; 610, first shielding portion; 620, second shielding portion; 630, third shielding portion; 322, second sliding member; 810, first accommodating cavity; 820, second accommodating cavity; 821, second side wall; 830, second hollow three-dimensional frame; 831, second flat plate; 8311, third opening; 832, third side wall; 833, third flat plate; 91. First slider; 92. Second slider; 93. First guide rail; 94. Second guide rail.

[0039] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of the overall / local structures or overall / local areas may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0040] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0041] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise," "include," etc. used herein indicate the presence of the features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0042] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0043] When expressions such as "at least one of A, B and C, etc." are used, they should generally be interpreted in accordance with the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0044] FIG1 schematically shows an exemplary application scenario of a security inspection device according to an embodiment of the present disclosure, but the present disclosure is not limited thereto.

[0045] As shown in FIG1 , a security inspection device 100 according to an embodiment of the present disclosure includes: a radiation device 10 (not shown in FIG1 ), a frame 20, a radiation shielding device 30, a supporting mechanism 40, a controller 50, and a computer 60. It will be understood that the radiation shielding device provided in the embodiment of the present disclosure is not limited to application to the security inspection device shown in the figure, and can be applied to other security inspection equipment or equipment or occasions requiring radiation shielding as needed.

[0046] Illustratively, the gantry 20 includes a security inspection passage, such as the passage parallel to the z-axis in FIG1 . The radiation device 10 and radiation shielding device 30 can be mounted to the security inspection passage within the gantry 20, for example, at the top of the security inspection passage along the y-axis. The radiation device 10 includes a beam-emitting component, such as an X-ray machine, that emits X-rays for inspection, as well as a detection and acquisition device. The carrying mechanism 40 carries the object 70 to be inspected through a scanning area between the beam-emitting component and the detection and acquisition device of the gantry 20. The beam-emitting component is movable so that the radiation emitted by the beam-emitting component can penetrate the object 70 to be inspected, or a specific region of the object, for scanning.

[0047] The detection and acquisition device, for example, is a detector and data acquisition unit with an integrated modular structure, such as a flat-panel detector, which detects radiation transmitted through the inspected object, obtains an analog signal, and converts the analog signal into a digital signal, thereby outputting X-ray projection data of the inspected object 70. The controller 50 is used to control the synchronous operation of various components of the entire system.

[0048] In some embodiments, the radiation device 10 includes a beam-emitting component defining a beam-emitting port, the beam-emitting component being configured to transmit radiation at a target location to scan an object under examination. The radiation shielding device 30 is configured to shield radiation from being emitted in undesirable directions, such as radiation that is not emitted in the beam-emitting direction of the beam-emitting component.

[0049] The computer 60 may be any electronic device having a display screen and supporting web browsing, including but not limited to a smart phone, a tablet computer, a laptop computer, a desktop computer, and the like.

[0050] It is understood that the disclosed embodiments do not limit the number of radiation devices 10 and radiation shielding devices 30 in the security inspection device 100. One radiation device 10 and one radiation shielding device 30 may be provided for each device and installed only at the top of the security inspection passage. Alternatively, multiple radiation devices 10 and 30 may be provided for each device and installed at the top, side, or bottom of the security inspection passage, so as to scan the object 70 from multiple viewing angles.

[0051] The radiation shielding device 30 according to the embodiment of the present disclosure will be described in detail below with reference to FIG. 2 to FIG. 9 based on the scenario described in FIG. 1 .

[0052] Figure 2 schematically illustrates a schematic structural diagram of a radiation shielding device according to an embodiment of the present disclosure. Figure 3 schematically illustrates an exploded view of the radiation shielding device in Figure 2 according to an embodiment of the present disclosure. Figure 4 schematically illustrates a cross-sectional view along line AA' in Figure 2 according to an embodiment of the present disclosure.

[0053] In some embodiments, referring to Figures 2-4 , the radiation shielding device 30 includes a fixed shielding member 31 and a movable shielding assembly 32. The fixed shielding member 31 is adapted to be fixedly mounted, for example, to the device housing, such as at the top of a security inspection tunnel. The fixed shielding member 31 includes or defines a first movable space, which is configured to allow the beam-emitting component 11 of the radiation device 10 to move within the first movable space to transmit radiation to the object 70 under inspection after reaching a target position. The movable shielding assembly 32 is adapted to be connected to the beam-emitting component 11 and is configured to move relative to the fixed shielding member 31 as the beam-emitting component 11 moves. For example, in some examples, the movement of the beam-emitting component 11 can drive the connected movable shielding assembly 32; in other examples, the movable shielding assembly can be driven to move synchronously with the beam-emitting component. At any target position, the movable shielding assembly 32 cooperates with the fixed shielding member 31 to form N shielding layers around the beam-emitting component 11, where N is an integer greater than or equal to 1. The N shielding layers are configured to shield radiation from radiating out of the beam-emitting direction of the beam-emitting component 11 .

[0054] For example, referring to FIG1 , the fixed shielding member 31 may be fixedly mounted on the rack 20 , where fixed mounting means that the position of the fixed shielding member 31 relative to the rack 20 remains unchanged, and the mounting method may include bonding, riveting, nailing, threaded fixing or welding.

[0055] In some embodiments, the target position can be determined by the object 70 to be inspected. After the object 70 to be inspected reaches a certain position in the security inspection channel, the computer 60 can issue an instruction to move the beam-emitting component 11 of the radiation device 10 so as to smoothly send rays to the object 70 to be inspected for scanning.

[0056] In other embodiments, the target location may be determined by a specific area of ​​the object 70 being inspected. For example, if the object 70 has been previously scanned and a suspicious area is found, the computer 60 may issue a command to move the beam emitting component 11 so that radiation can be smoothly transmitted to the suspicious area for a re-inspection scan.

[0057] 1 to 4 , along the y-axis, the movable shielding assembly 32 is located above the fixed shielding member 31 , and the movable shielding assembly 32 can move within the first movable space as the beam-emitting component 11 moves.

[0058] Exemplarily, the movable shielding assembly 32 can be fixedly connected to the beam-emitting component 11 or can be detachably connected. Specifically, referring to FIG4 , the beam-emitting opening 111 of the beam-emitting component 11 can pass through the movable shielding assembly 32. The negative direction of the y-axis in FIG1 is the beam-emitting direction, such that the radiation is transmitted downward along the y-axis in FIG1 .

[0059] Illustratively, the radiation device 10 may include a drive component connected to the beam-emitting component 11, which drives the beam-emitting component 11 to a target position upon receiving movement instructions from the computer 60. In some embodiments, the beam-emitting component 11 also drives the movable shielding assembly 32. In other embodiments, the movable shielding assembly 32 may also be configured with a drive component. When the beam-emitting component 11 moves, the movable shielding assembly 32 is driven by the driving force of the drive component and moves synchronously with the beam-emitting component 11.

[0060] Exemplarily, the movable shielding assembly 32 can circumferentially surround a portion of the beam-emitting component 11 below and partially extend into the first movable space of the fixed shielding member 31. In this case, the fixed shielding member 31 can also circumferentially surround the beam-emitting component 11, so that the movable shielding assembly 32 cooperates with the fixed shielding member 31 to form N layers of shielding layers circumferentially surrounding the beam-emitting component 11. Since the movable shielding assembly 32 moves with the beam-emitting component 11, the N layers of shielding layers, except for the shielding layers belonging to the fixed shielding member 31, also move with it. In conjunction with the fixed shielding layer provided by the fixed shielding member 31, a shielding function can be provided at any target position. Referring to Figure 4, the fixed shielding member 31 has an opening below, which allows the beam outlet 111 of the beam-emitting component 11 to send radiation downward. In addition to the opening below, the N layers of shielding layers can shield radiation on either side of the beam-emitting component 11.

[0061] According to the embodiments of the present disclosure, as the beam-emitting component 11 of the radiation device 10 moves to a target position within the first movable space, the movable shielding assembly 32 cooperates with the fixed shielding member 31 to consistently form N shielding layers around the beam-emitting component 11. Because the movable shielding assembly 32 moves relative to the fixed shielding member 31 as the beam-emitting component 11 moves, this overcomes the drawback of related art, which results in a larger overall volume to accommodate the movement of the beam-emitting component 11. This eliminates the need for excessive bulk and reduces weight, resulting in a simplified structure and cost savings. Furthermore, one or more shielding layers can effectively reduce the risk of radiation leakage at any target location.

[0062] In some embodiments, the N shielding layers are configured to have M shielding layers on at least one side of the beam-emitting component 11 in the circumferential direction, where M is an integer greater than or equal to 2, and M is less than or equal to N. The gap defined between at least one of the M shielding layers and any adjacent shielding layer includes a bending gap.

[0063] The other shielding layers except the M shielding layers in the N shielding layers can shield the radiation from above.

[0064] For example, the fixed shielding member 31 and the movable shielding assembly 32 can be made of metal with a high atomic number, such as lead, iron or metal alloy, etc. Therefore, each shielding layer itself has a shielding effect on radiation.

[0065] Referring to Figure 4 , gaps exist between the fixed shielding member 31 and the movable shielding assembly 32. The gaps defined between the shielding layers serve as radiation leakage paths. The fixed shielding member 31 and the movable shielding assembly 32 include bent portions, or the individual components are connected by bending, such that the gaps defined between at least one shielding layer and any adjacent shielding layer comprise bent gaps.

[0066] According to the embodiments of the present disclosure, the curved gap provides a curved leakage path for radiation. In other words, except in the beam-out direction, the radiation cannot be directly radiated outside the radiation shielding device 30. Therefore, as the radiation radiates outward along the curved leakage path, it is gradually absorbed, causing the radiation to gradually weaken, thereby avoiding the risk of radiation leakage harming the human body.

[0067] Fig. 5(a) schematically shows a structural diagram of a fixed shielding member 31 according to an embodiment of the present disclosure. Fig. 5(b) schematically shows a structural diagram of the fixed shielding member 31 in Fig. 5(a) from another perspective according to an embodiment of the present disclosure.

[0068] In some embodiments, as shown in Figures 5(a) and 5(b), the fixed shielding member 31 includes a first opening 311 and a second opening 312. The interior of the first opening 311 forms a first movable space to allow the beam-emitting component 11 to move within the first opening 311. The second opening 312 is opposite the first opening 311 along the beam-emitting direction and is interconnected. The movable shielding assembly 32 and the first opening 311 are arranged to allow the beam-emitting component 11 to sequentially pass through the movable shielding assembly 32 and the first opening 311 along the beam-emitting direction.

[0069] Exemplarily, referring to FIG. 4 and FIG. 5( a ) and FIG. 5( b ), the beam-emitting component 11 can move within a first movable space defined by the first opening 311 , and can send radiation to the object 70 to be detected through a second opening 312 communicating with the first opening 311 .

[0070] In some embodiments, the fixed shielding member 31 includes a first hollow three-dimensional frame 500. The first hollow three-dimensional frame 500 includes a first flat plate 510 and a plurality of first sidewalls 520. The first flat plate 510 includes a first opening 311 and is perpendicular to the beam output direction. The first sidewalls 520 are perpendicular to the first flat plate 510. Each first sidewall 520 is connected to a side edge of the first flat plate 510 and surrounds and connects to form a second opening 312. The N-layer shielding layer includes the first flat plate 510 and the first sidewalls 520.

[0071] 5( a ) and 5 ( b ), the first hollow three-dimensional frame 500 may be a hollow rectangular parallelepiped frame. The first flat plate 510 is located at the top of the hollow rectangular parallelepiped frame and has a first opening 311 to allow the beam-emitting component 11 to pass through and to allow the beam-emitting component 11 to move in its length direction.

[0072] 5( a ) and 5 ( b ), the first hollow three-dimensional frame 500 has four first side walls 520 , which are respectively connected to the sides of the first flat plate 510 . The four first side walls 520 are connected around and form a second opening 312 .

[0073] In some embodiments, the area of ​​the second opening 312 is larger than the area of ​​the first opening 311 .

[0074] In addition, the first hollow three-dimensional frame 500 further includes a plurality of bottom plates 530 below. The bottom plates 530 are flush with the second openings 312 and are used for connecting with the rack 20 .

[0075] According to the embodiment of the present disclosure, the solid portion of the first plate 510 except the first opening 311 and the first sidewall 520 can both shield radiation outside the beam-emitting direction.

[0076] It should be noted that the hollow rectangular parallelepiped frame shown in Figures 5(a) and 5(b) is only one embodiment of the first hollow three-dimensional frame 500. For example, the first hollow three-dimensional frame 500 can also be a hollow cube frame or other shapes. The present disclosure does not intend to limit the first opening 311 to a rectangular shape; for example, it can be a cross, L-shaped, or other shapes.

[0077] Fig. 6 schematically shows a schematic structural diagram of the first sliding member 321 according to an embodiment of the present disclosure. Fig. 7 schematically shows a schematic structural diagram of the first sliding member 321 in Fig. 6 from another perspective according to an embodiment of the present disclosure.

[0078] In some embodiments, as shown in Figures 6 and 7 , the movable shielding assembly 32 includes a first slider 321 adapted to be coupled to the beam-emitting component 11. The first slider 321 is configured to slide driven by the beam-emitting component 11. The first slider 321 and the first opening 311 are arranged to allow the beam-emitting component 11 to sequentially pass through the first slider 321 and the first opening 311 along the beam-emitting direction.

[0079] In some embodiments, the first sliding member 321 is driven by the beam emitting component 11 to slide along the fixed shielding member 31 , for example, along the length direction of the first opening 311 , where the length direction is perpendicular to the beam emitting direction.

[0080] 5( a ) and 5 ( b ), when the first opening 311 is rectangular, the first sliding member 321 of this embodiment can slide along the length direction of the first opening 311 , thereby allowing the beam outlet 111 of the beam outlet component 11 to move within the first opening 311 .

[0081] In some embodiments, the first slider 321 includes a first shielding portion 610, a second shielding portion 620, and a third shielding portion 630. The first shielding portion 610 is perpendicular to the beam-emitting direction. The first shielding portion 610 and the first opening 311 are arranged to allow the beam-emitting component 11 to pass through the first shielding portion 610 and the first opening 311 sequentially along the beam-emitting direction. The second shielding portion 620 is perpendicular to the first shielding portion 610 and is connected to a first side of the first shielding portion 610. The third shielding portion 630 is parallel to the second shielding portion 620 and is connected to a second side of the first shielding portion 610. The N-layer shielding layer includes the first shielding portion 610, the second shielding portion 620, and the third shielding portion 630.

[0082] 6 and 7 , the first shielding portion 610 may be a flat plate, and the second and third shielding portions 620 and 630 are connected to opposite sides of the first shielding portion 610. After radiation is emitted from or leaks from the beam-emitting component 11, the first shielding portion 610 may provide shielding from above. The second and third shielding portions 620 and 630 may be located on either side of the beam-emitting component 11, defining a curved gap between them and other components.

[0083] Fig. 8 schematically shows a schematic structural diagram of the second sliding member 322 according to an embodiment of the present disclosure. Fig. 9 schematically shows a schematic structural diagram of the second sliding member 322 in Fig. 8 from another perspective according to an embodiment of the present disclosure.

[0084] In some embodiments, the movable shielding assembly 32 further includes a second sliding member 322 connected to the first sliding member 321. The second sliding member 322 is configured to slide driven by the first sliding member 321. The first sliding member 321, the second sliding member 322, and the first opening 311 are arranged to allow the beam-emitting component 11 to sequentially pass through the first sliding member 321, the second sliding member 322, and the first opening 311 along the beam-emitting direction.

[0085] Exemplarily, referring to FIG. 2 to FIG. 9 , the beam-emitting component 11 may pass through the first shielding portion 610 , then pass through the second sliding member 322 , and finally pass through the first opening 311 .

[0086] In some embodiments, the second sliding member 322 includes a first accommodating cavity 810 and a second accommodating cavity 820. The first accommodating cavity 810 is connected to the first sliding member 321. At least a portion of the second accommodating cavity 820 is embedded in the first accommodating cavity 810, and the second accommodating cavity 820 is movable within the first opening 311. The first sliding member 321, the second accommodating cavity 820, and the first opening 311 are arranged to allow the beam-emitting component 11 to sequentially pass through the first sliding member 321, the second accommodating cavity 820, and the first opening 311 along the beam-emitting direction and to be movable within the second accommodating cavity 820.

[0087] 3 , 4 , 8 and 9 , the first accommodating cavity 810 is used to accommodate the beam-emitting component 11 . When the first sliding member 321 and the second sliding member 322 move relative to each other, the beam-emitting component 11 can also move within the second accommodating cavity 820 .

[0088] In some embodiments, the second accommodating cavity 820 includes a second sidewall 821 . The second sidewall 821 is parallel to the beam output direction, and a plurality of second sidewalls 821 are interconnected to form the second accommodating cavity 820 . The N shielding layers include the second sidewall 821 .

[0089] 8 and 9 , there may be four vertical second sidewalls 821 surrounding a second accommodating cavity 820 . Part of the second accommodating cavity 820 is above the first accommodating cavity 810 , and the rest is inside the first accommodating cavity 810 .

[0090] The second sidewall 821 surrounds the beam outlet 111 of the beam outlet component 11, forming a shielding layer around the beam outlet 111. A gap is formed between the second sidewall 821 and the outer wall of the beam outlet 111. This gap connects with the gap between the second sidewall 821 and the first sliding member 321, forming a bent gap. In some embodiments, the second sidewall 821 is bent, with the bent portion 8211 located at the top of the second sidewall 821.

[0091] In some embodiments, the first accommodating cavity 810 includes a second hollow three-dimensional frame 830. The second hollow three-dimensional frame 830 includes a second flat plate 831 and a third sidewall 832. The second flat plate 831 includes a third opening 8311, which is perpendicular to the beam output direction. At least a portion of the second accommodating cavity 820 is embedded in the third opening 8311. The third sidewalls 832 are perpendicular to the second flat plate 831. Each third sidewall 832 is connected to a side edge of the second flat plate 831, and the third sidewalls 832 are connected to form the first accommodating cavity 810. The N-layer shielding layer includes the second flat plate 831 and the third sidewall 832.

[0092] As shown in Figures 8 and 9, the second hollow three-dimensional frame 830 can be a hollow rectangular parallelepiped frame. The second flat plate 831 is located at the top of the hollow rectangular parallelepiped frame and has a third opening 8311 to allow the second accommodating cavity 820 to be inserted. The second sidewall 821 is perpendicular to the second flat plate 831 and has a portion of the sidewall extending upward above the second flat plate 831. Similarly, a portion of the sidewall extends downward below the second flat plate 831, thereby surrounding as much of the beam outlet 111 as possible in the beam output direction, thereby increasing the shielding range.

[0093] The second sliding member 322 can be directly placed above the fixed shielding member 31, wherein the portion of the second accommodating cavity 820 below the second plate 831 passes through the first opening 311 and is placed inside the fixed shielding member 31. Therefore, the second accommodating cavity 820 can move within the first opening 311.

[0094] 8 and 9 , the second hollow three-dimensional frame 830 has four third side walls 832 , which are respectively connected to the sides of the second flat plate 831 . The four third side walls 832 are connected to form the first receiving cavity 810 .

[0095] In addition, a plurality of third flat plates 833 are further provided below the second hollow three-dimensional frame 830 . The third flat plates 833 are flush with the bottom of the first accommodating cavity 810 and are used to connect with the first sliding member 321 .

[0096] According to the embodiment of the present disclosure, outside the beam outlet 111, the second side wall 821 primarily serves as a shield. Since part of the second accommodating cavity 820 is within the first opening 311, the fixed shielding member 31 also serves as a shield outside the second side wall 821. The projection of the second hollow three-dimensional frame 830 along the beam outlet direction can cover the projection of the first hollow three-dimensional frame 500 along the beam outlet direction. That is, the first hollow three-dimensional frame 500 is located within the second hollow three-dimensional frame 830. Therefore, the second hollow three-dimensional frame 830 serves as a shield outside the fixed shielding member 31.

[0097] Therefore, referring to FIG. 2 to FIG. 9 , the M shielding layer may include at least any second side wall 821 , any first side wall 520 , any third side wall 832 , the second shielding portion 620 and the third shielding portion 630 .

[0098] It should be noted that the hollow rectangular parallelepiped frame shown in Figures 8 and 9 is only one embodiment of the second hollow three-dimensional frame 830. For example, the second hollow three-dimensional frame 830 can also be a hollow cube frame or other shapes. The present disclosure does not intend to limit the third opening 8311 to a rectangular shape; for example, it can be a cross, L-shaped, or other shapes.

[0099] It is understandable that, in other embodiments, the second sliding member may also be configured with a separate driving component to achieve synchronous movement with the first sliding member through the driving component, without being driven by the first sliding member.

[0100] When the second sliding member is driven to move by the first sliding member, the two can be connected via a guide rail and a slider, which will be further described below.

[0101] In some embodiments, the radiation shielding device 30 further includes a guide rail assembly connected to the first sliding member 321 and the second sliding member 322 , such that the second sliding member 322 can slide relative to the first sliding member 321 along the guide rail assembly.

[0102] In some embodiments, the guide rail assembly includes a first guide rail 93 and a second guide rail 94. The first guide rail 93 is mounted on a first side of the first sliding member 321 and connected to one side of the first accommodating cavity 810. The second guide rail 94 is parallel to the first guide rail 93 and is mounted on a second side opposite to the first sliding member 321 and connected to the other side opposite to the first accommodating cavity 810.

[0103] 2 to 9 , the first guide rail 93 is connected to the first accommodating cavity 810 through a third flat plate 833 on one side of the bottom of the first accommodating cavity 810 , and the first guide rail 93 is connected to the first accommodating cavity 810 through a third flat plate 833 on the other side opposite to the bottom of the first accommodating cavity 810 .

[0104] In some embodiments, the radiation shielding device 30 further includes a first slider 91 and a second slider 92. The first slider 91 is movably mounted to a first guide rail 93 and connected to one side of the first accommodating cavity 810. The second slider 92 is movably mounted to a second guide rail 94 and connected to the opposite side of the first accommodating cavity 810.

[0105] 2 to 9 , there may be multiple first sliders 91 or multiple second sliders 92, thereby ensuring a stable connection between the first slider 321 and the second slider 322. The first slider 91 is connected to the first accommodating cavity 810 via a third flat plate 833 on one side of the bottom of the first accommodating cavity 810, and the first guide rail 93 is connected to the first accommodating cavity 810 via a third flat plate 833 on the other side opposite the bottom of the first accommodating cavity 810.

[0106] In some embodiments, the first slider 321 is configured to slide driven by the beam-emitting component 11, such that: when the second accommodating cavity 820 is movable within the first opening 311, the first slider 91 moves synchronously with the first guide rail 93, and the second slider 92 moves synchronously with the second guide rail 94. And / or when the second accommodating cavity 820 is blocked by an edge of the first opening 311, the first slider 91 moves relative to the first guide rail 93, and the second slider 92 moves relative to the second guide rail 94, and the beam-emitting component 11 moves within the second accommodating cavity 820.

[0107] 1 to 9 , and in combination with one or more of the above embodiments, the assembly and working process of the radiation shielding device 30 will be further described below.

[0108] In some embodiments, the assembly process is as follows: First, the first sliding member 321 is connected to the beam-emitting component 11, that is, the beam outlet 111 passes through the first sliding member 321. Then, the first guide rail 93 and the second guide rail 94 are installed on both sides of the first sliding member 321, and the first slider 91 is installed on the first guide rail 93, and the second slider 92 is installed on the second guide rail 94. Then, the beam outlet 111 is placed into the second accommodating cavity 820 of the second sliding member 322 (for example, after being placed, the bottom of the beam outlet 111 is flush with the bottom of the second accommodating cavity 820), and the two sides of the first accommodating cavity 810 are bolted to the first slider 91 and the second slider 92 respectively. Next, the cavity below the second accommodating cavity 820 is placed into the first opening 311 of the fixed shielding member 31. The first accommodating cavity 810 is simultaneously covered on the fixed shielding member 31 to obtain the radiation shielding device 30. Finally, the fixed shielding member 31 is connected to the frame 20.

[0109] After the first sliding member 321 , the second sliding member 322 and the fixed shielding member 31 are assembled according to the above steps to obtain the radiation shielding device 30 , the projections of the beam outlet 111 , the first opening 311 and the second accommodating cavity 820 overlap along the beam output direction.

[0110] It is particularly noted that the present disclosure does not intend to limit the assembly process of the radiation shielding device 30 to the sequential steps as in the above embodiment. It can be assembled flexibly according to actual conditions. For example, the fixed shielding component 31 can be connected to the frame 20 first, and then the first sliding member 321 can be installed at the beam outlet 111 of the beam outlet component 11.

[0111] In some embodiments, the operating process is as follows: When the beam-emitting component 11 begins to move toward the target position, it drives the first slider 321 to move along the length of the first opening 311 of the fixed shielding member 31. If the second accommodating cavity 820 of the second slider 322 can move within the first opening 311, the first slider 321 drives the first and second sliders 91 and 92 via the guide rail assembly, thereby causing the second slider 322 to move synchronously. When the second accommodating cavity 820 moves to the edge of the first opening 311 and is blocked, the first slider 321 drives the guide rail assembly to continue moving, causing relative displacement between the guide rail assembly and the first and second sliders 91 and 92. At this point, the fixed shielding member 31 and the second slider 322 do not move, and the beam outlet 111 moves within the second accommodating cavity 820. Regardless of where the beam-emitting component 11 moves, its beam outlet 111 remains within the fixed shielding member 31 and the movable shielding assembly 32. The N shielding layers can shield radiation from radiation outside the beam-emitting direction of the beam-emitting component 11.

[0112] FIG10 schematically shows a flow chart of a radiation shielding method according to an embodiment of the present disclosure.

[0113] As shown in FIG. 10 , the radiation shielding method of this embodiment includes operations S1010 to S1040 .

[0114] In operation S1010 , a fixed shielding member having a first movable space is provided.

[0115] In operation S1020 , a beam-emitting component of the radiation device is assembled so that the beam-emitting component can move within a first movable space to emit radiation after reaching a target position.

[0116] In some embodiments, for example, the beam-emitting component is moved to a target position, so that the beam-emitting structure sends radiation through a beam outlet at the target position to scan the object to be inspected.

[0117] In some embodiments, for example, determining a target position based on a suspicious area of ​​the object to be inspected, and causing the beam-emitting structure to send radiation through a beam outlet at the target position to scan the object to be inspected includes:

[0118] The beam-emitting structure is made to send rays through the beam-emitting port at the target position to scan the suspicious area.

[0119] In operation S1030 , a movable shielding assembly is provided and connected to a beam-emitting component, such that the movable shielding assembly moves relative to the fixed shielding member as the beam-emitting component moves.

[0120] In operation S1040, the movable shielding assembly cooperates with the fixed shielding member to form N shielding layers around the beam-emitting component at any target position, where N is an integer greater than or equal to 1, and the N shielding layers shield radiation from radiating out of the beam-emitting direction of the beam-emitting component.

[0121] It can be understood that, referring to FIG. 1 to FIG. 9 , the radiation shielding method of this embodiment includes a plurality of steps corresponding to implementing any of the above device embodiments, which will not be described in detail here.

[0122] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of this disclosure may be combined and / or coupled in various ways, even if such combinations and / or couplings are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure may be combined and / or coupled in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or couplings are intended to fall within the scope of this disclosure.

[0123] The embodiments of the present disclosure are described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although each embodiment has been described separately above, this does not mean that the measures in each embodiment cannot be used in combination to advantage. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A radiation shielding device, comprising: A fixed shielding member, which is adapted to be fixedly installed and includes a first movable space, wherein the first movable space is configured to allow a beam-emitting component of a radiation device to move within the first movable space so as to send radiation to an object to be detected after reaching a target position; and a movable shielding assembly, adapted to be connected to the beam-emitting component and configured to move relative to the fixed shielding member as the beam-emitting component moves, wherein, at any of the target positions, the movable shielding assembly cooperates with the fixed shielding member to form N shielding layers around the beam-emitting component, where N is an integer greater than or equal to 1; The N shielding layers are configured to shield the radiation from radiating out of the beam-emitting direction of the beam-emitting component.

2. The radiation shielding device according to claim 1, wherein: The N shielding layers are configured to have M shielding layers on at least one side of the beam-emitting component in the circumferential direction, where M is an integer greater than or equal to 2, and M is less than or equal to N; Wherein, the gap defined between at least one shielding layer among the M shielding layers and any adjacent shielding layer comprises a bending gap.

3. The radiation shielding device according to claim 1 or 2, wherein: The fixed shielding member comprises: A first opening, wherein the first movable space is formed inside the first opening to allow the beam-emitting component to move within the range of the first opening; A second opening is opposite to the first opening along the beam-emitting direction and is interconnected with the first opening; The movable shielding assembly and the first opening are arranged to allow the beam-emitting component to sequentially pass through the movable shielding assembly and the first opening along the beam-emitting direction.

4. The radiation shielding device according to claim 3, wherein: The fixed shielding member comprises a first hollow three-dimensional frame, including: A first flat plate, comprising the first opening, wherein the first flat plate is perpendicular to the beam-emitting direction; A first side wall is perpendicular to the first plate, each of the first side walls is connected to a side edge of the first plate, and the first side walls are connected around to form the second opening; The N shielding layers include the first plate and the first side wall.

5. The radiation shielding device according to claim 3, wherein: The active shielding component comprises: A first sliding member, adapted to be connected to the beam-emitting component, wherein the first sliding member is configured to be driven by the beam-emitting component to slide; The first sliding member and the first opening are arranged to allow the beam-emitting component to pass through the first sliding member and the first opening in sequence along the beam-emitting direction.

6. The radiation shielding device according to claim 5, wherein: The first sliding member is configured to be driven by the beam-emitting component to slide, including: The first sliding member is driven by the beam-emitting component to slide along the fixed shielding member.

7. The radiation shielding device according to claim 5, wherein: The first sliding member comprises: A first shielding portion, perpendicular to the beam-emitting direction, wherein the first shielding portion and the first opening are arranged to allow the beam-emitting component to sequentially pass through the first shielding portion and the first opening along the beam-emitting direction; a second shielding portion, perpendicular to the first shielding portion and connected to the first side of the first shielding portion; a third shielding portion, parallel to the second shielding portion and connected to the second side of the first shielding portion; The N shielding layers include the first shielding portion, the second shielding portion and the third shielding portion.

8. The radiation shielding device according to any one of claims 5 to 7, wherein: The active shielding component also includes: a second sliding member connected to the first sliding member, wherein the second sliding member is configured to be driven by the first sliding member to slide; The first sliding member, the second sliding member, and the first opening are arranged to allow the beam-emitting component to sequentially pass through the first sliding member, the second sliding member, and the first opening along the beam-emitting direction.

9. The radiation shielding device according to claim 8, wherein: The second sliding member comprises: A first accommodating cavity connected to the first sliding member; a second accommodating cavity, at least a portion of which is embedded in the first accommodating cavity, and the second accommodating cavity is movable in the first opening; The first sliding member, the second accommodating cavity and the first opening are arranged to allow the beam-emitting component to sequentially pass through the first sliding member, the second accommodating cavity and the first opening along the beam-emitting direction, and The second accommodating chamber is movable.

10. The radiation shielding device according to claim 9, wherein: The second accommodating chamber comprises: A second side wall, parallel to the beam-emitting direction, a plurality of the second side walls are connected to each other to form the second accommodating cavity; Wherein, the N-layer shielding layer includes the second side wall.

11. The radiation shielding device according to claim 10, wherein: The first accommodating cavity includes a second hollow three-dimensional frame, including: A second flat plate, comprising a third opening, the second flat plate being perpendicular to the beam-emitting direction, and at least a portion of the second accommodating cavity being embedded in the third opening; A third side wall is perpendicular to the second plate, each of the third side walls is connected to a side edge of the second plate, and the third side walls are connected around to form the first accommodation cavity; Wherein, the N-layer shielding layer includes the second plate and the third side wall.

12. The radiation shielding device according to any one of claims 9 to 11, wherein: The radiation shielding device further comprises: The guide rail assembly is connected with the first sliding member and the second sliding member so that the second sliding member can slide along the guide rail assembly relative to the first sliding member.

13. The radiation shielding device of claim 12, wherein: The rail assembly includes: A first guide rail, mounted on a first side of the first sliding member and connected to one side of the first accommodating cavity; The second guide rail is parallel to the first guide rail, is installed on a second side opposite to the first sliding member, and is connected to the other side opposite to the first accommodating cavity.

14. The radiation shielding device of claim 13, wherein: The radiation shielding device further comprises: A first slider, movably mounted to the first guide rail and connected to one side of the first accommodating cavity; The second slider is movably mounted on the second guide rail and connected to the other side opposite to the first accommodating cavity.

15. The radiation shielding device of claim 14, wherein: The first sliding member is configured to be driven by the beam-emitting component to slide, so that: When the second accommodating cavity is movable in the first opening, the first slider moves synchronously with the first guide rail, and the second slider moves synchronously with the second guide rail; and / or When the second accommodating cavity is blocked by the edge of the first opening, the first slider moves relative to the first guide rail, and the second slider moves relative to the second guide rail, and the beam-emitting component moves in the second accommodating cavity.

16. A radiation shielding method comprising: Providing a fixed shielding member having a first movable space; Assembling a beam-emitting component of the radiation device so that the beam-emitting component can move in the first movable space to emit radiation after reaching a target position; Providing a movable shielding assembly and connecting the movable shielding assembly to the beam-emitting component, so that the movable shielding assembly moves relative to the fixed shielding member as the beam-emitting component moves; The movable shielding assembly cooperates with the fixed shielding member to form N shielding layers around the beam-emitting component at any target position, where N is an integer greater than or equal to 1, and the N shielding layers shield the radiation from radiating outside the beam-emitting direction of the beam-emitting component.

17. A security inspection device, comprising: A radiation device having a beam-emitting component defining a beam-emitting port, the beam-emitting component being configured to send radiation at a target position to scan an object to be inspected; and The radiation shielding device according to any one of claims 1 to 15, wherein the radiation shielding device is configured to shield radiation of the radiation outside the beam-emitting direction of the beam-emitting component.

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