Radiation shielding device, radiation shielding method and security inspection equipment

Abstract

A radiation shielding device is provided that includes a fixed shielding member and a movable shielding assembly. The fixed shielding component is suitable for being fixedly mounted and comprises a first activity space, and the first activity space is constructed to allow a beam outlet component of a radiation device to move in the first activity space so as to send rays to a detected object after reaching a target position; the movable shielding component is suitable for being connected with the beam outlet component and is configured to move relative to the fixed shielding component along with the movement of the beam outlet component, and at any target position, the movable shielding component is matched with the fixed shielding component to form N shielding layers surrounding the beam outlet component, n is an integer greater than or equal to 1; wherein the N shielding layers are configured to shield radiation of the rays out of the beam outgoing direction of the beam outgoing component. The invention also provides a radiation shielding method and security inspection equipment.

Description

Technical Field

[0001] The present disclosure relates to the technical field of radiation shielding, and more specifically, to a radiation shielding device, a radiation shielding method and security inspection equipment. Background Art

[0002] Radiation testing is widely used in industrial flaw detection, medicine, safety inspection and other fields. Radiation devices are usually used to send radiation such as X-rays, gamma rays or neutron rays for testing. Certain radiation will produce certain biological effects when penetrating the human body. If the amount of radiation is too much and exceeds the allowable exposure, it may cause a certain degree of radiation damage.

[0003] In the related art, a radiation shielding structure that is fixed and closed as a whole is generally configured for a radiation device. For example, a movable beam-emitting component is wrapped in a fixed shell, and a shielding layer is attached to the inner or outer wall of the shell. Alternatively, a shielding cover is made, and the entire moving track of the beam-emitting component is contained in the shielding cover.

[0004] However, in order to allow the beam-emitting component to move therein, the radiation shielding structure in the related art has a larger overall volume, which increases the overall weight of the radiation device. If the radiation shielding structure is reduced in order to reduce the weight, there is a risk of radiation leakage and harm to the human body during the movement of the beam-emitting component. Summary of the invention

[0005] In view of the above problems, the present disclosure provides a radiation shielding device, a radiation shielding method and a security inspection device which can reduce weight and prevent radiation leakage from harming the human body.

[0006] 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, wherein the first movable space is 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, which is suitable for being connected to the beam-emitting component and is 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 surrounding the beam-emitting component, N being an integer greater than or equal to 1; wherein the N shielding layers are configured to shield radiation outside the beam-emitting direction of the beam-emitting component.

[0007] 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 of the M shielding layers and any adjacent shielding layer includes a bending gap.

[0008] 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.

[0009] 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 is perpendicular to the beam output direction; a first side wall, perpendicular to the first flat plate, each of the first side walls is connected to the side of the first flat plate, and each of the first side walls is connected around to form the second opening; wherein the N-layer shielding layer includes the first flat plate and the first side wall.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] In some embodiments, the movable shielding assembly also includes: a second sliding member connected to the first sliding member, and the second sliding member is configured to slide driven by the first sliding member; 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.

[0014] In some embodiments, the second sliding member includes: 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; wherein 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 be movable in the second accommodating cavity.

[0015] In some embodiments, the second accommodating cavity includes: a second side wall parallel to the beam output direction, and a plurality of the second side walls are interconnected to form the second accommodating cavity; wherein the N shielding layers include the second side wall.

[0016] 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-emitting direction, and at least part of the cavity of the second accommodating cavity is embedded in the third opening; a third side wall, which is 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.

[0017] In some embodiments, the radiation shielding device further includes: a guide rail assembly connected to 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.

[0018] In some embodiments, the guide rail assembly includes: a first guide rail, installed 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 is installed on a second side opposite to the first sliding member and connected to the other side opposite to the first accommodating cavity.

[0019] In some embodiments, the radiation shielding device also 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.

[0020] 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 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.

[0021] Another aspect of an embodiment of the present disclosure provides a radiation shielding method, comprising: providing a fixed shielding component 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 component as the beam-emitting component moves; cooperating the movable shielding assembly with the fixed shielding component to form N shielding layers around the beam-emitting component at any of the target positions, N being 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.

[0022] Another aspect of an embodiment of the present disclosure provides a security inspection device, including: a radiation device, which has a beam-out component that defines a beam outlet, and the beam-out 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 radiation outside the beam-out direction of the beam-out component.

[0023] One or more embodiments described in the present disclosure have at least the following beneficial effects: when the beam-emitting component of the radiation device moves to the target position in the first movable space, the movable shielding assembly cooperates with the fixed shielding member to always form N shielding layers around the beam-emitting component. Since the movable shielding assembly moves relative to the fixed shielding member as the beam-emitting component moves, the defect of the related art that the overall volume is large in order to accommodate the moving trajectory of the beam-emitting component is overcome, so that there is no need for an excessively large volume and a small weight, the structure can be simplified and the cost can be saved, and one or more shielding layers can also effectively reduce the risk of radiation leakage at any target position. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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:

[0025] Figure 1 The application scenario diagram of the security inspection device according to the embodiment of the present disclosure is schematically shown;

[0026] Figure 2 The schematic diagram of the structure of the radiation shielding device according to the embodiment of the present disclosure is shown;

[0027] Figure 3 Schematically illustrates an embodiment of the present disclosure Figure 2 Exploded view of the radiation shielding device;

[0028] Figure 4 Schematically illustrates an embodiment of the present disclosure Figure 2 Section along line AA';

[0029] FIG5( a) schematically shows a structural diagram of a fixed shielding member according to an embodiment of the present disclosure;

[0030] FIG5( b ) schematically shows a structural diagram of the fixed shielding member in FIG5( a ) from another viewing angle according to an embodiment of the present disclosure;

[0031] Figure 6 The schematic diagram of the structure of the first sliding member according to the embodiment of the present disclosure is shown;

[0032] Figure 7 Schematically illustrates an embodiment of the present disclosure Figure 6 A schematic structural diagram of the first sliding member from another perspective;

[0033] Figure 8 The schematic diagram of the structure of the second sliding member according to the embodiment of the present disclosure is shown;

[0034] Fig. 9 Schematically illustrates an embodiment of the present disclosure Figure 8 A schematic structural diagram of the second sliding member from another perspective; and

[0035] Fig.10 The flowchart of the radiation shielding method according to the embodiment of the present disclosure is schematically shown.

[0036] In the above drawings, the meanings of the reference numerals are as follows:

[0037] The relative position and movement relationship between the sliding part and the fixed part

[0038] 20. rack; 40. carrying mechanism; 50. controller; 60. computer; 70. object to be detected;

[0039] 10. radiation device; 11. beam outlet component; 111. beam outlet;

[0040] 30. Radiation shielding device;

[0041] 31, fixed shielding member; 311, first opening; 312, second opening; 500, first hollow three-dimensional frame; 510, first flat plate; 520, first side wall;

[0042] 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;

[0043] 91. First slider; 92. Second slider; 93. First guide rail; 94. Second guide rail.

[0044] 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 the overall / local areas may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0045] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, 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 known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0046] 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 existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0047] All terms (including technical and scientific terms) used herein 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.

[0048] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to 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.).

[0049] Figure 1 An exemplary application scenario diagram of the security inspection equipment according to an embodiment of the present disclosure is schematically shown, but the present disclosure is not limited thereto.

[0050] like Figure 1 As shown, the security inspection device 100 according to the embodiment of the present disclosure includes: a radiation device 10 ( Figure 1 The radiation shielding device 30 is not shown), a frame 20, a radiation shielding device 30, a carrying 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 the security inspection equipment shown in the figure, and can be applied to other security inspection equipment or equipment or occasions requiring radiation shielding as needed.

[0051] Exemplarily, the rack 20 includes a security inspection channel, such as Figure 1 The radiation device 10 and the radiation shielding device 30 can be installed in the security inspection channel in the rack 20, for example, installed on the top of the security inspection channel along the y-axis direction. The radiation device 10 includes a beam-emitting component for emitting X-rays for inspection, such as an X-ray machine, and a detection and acquisition device. The carrying mechanism 40 carries the object 70 to be inspected through the scanning area between the beam-emitting component of the rack 20 and the detection and acquisition device, and the beam-emitting component can move, so that the rays emitted by the beam-emitting component can pass through the object 70 to be inspected or a local area of ​​the object for scanning.

[0052] The detection and acquisition device is, for example, a detector and a data acquisition device with an integral module structure, such as a flat panel detector, which is used to detect the rays penetrating the inspected object, obtain analog signals, and convert the analog signals into digital signals, thereby outputting the projection data of the inspected object 70 for the X-rays. The controller 50 is used to control the various parts of the entire system to work synchronously.

[0053] In some embodiments, the radiation device 10 has a beam outlet component defining a beam outlet, and the beam outlet component is configured to send radiation at a target position to scan the object to be inspected. The radiation shielding device 30 is configured to shield radiation from undesired directions, such as radiation outside the beam outlet direction of the beam outlet component.

[0054] 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.

[0055] It is understandable that the embodiment of the present disclosure does not limit the number of radiation devices 10 and radiation shielding devices 30 in the security inspection device 100. Each device may have one and be installed only at the top of the security inspection channel. Each device may also have multiple devices installed at the top, side, and bottom of the security inspection channel to scan the object 70 at multiple viewing angles.

[0056] The following will be based on Figure 1 The scene described by Figure 2 to Figure 9 The radiation shielding device 30 according to the embodiment of the present disclosure is described in detail.

[0057] Figure 2 The structural diagram of the radiation shielding device according to the embodiment of the present disclosure is schematically shown. Figure 3 Schematically illustrates an embodiment of the present disclosure Figure 2 Exploded view of the radiation shielding device. Figure 4 Schematically illustrates an embodiment of the present disclosure Figure 2 Section along line AA'.

[0058] In some embodiments, reference Figure 2 to Figure 4 The radiation shielding device 30 includes a fixed shielding member 31 and a movable shielding assembly 32. The fixed shielding member 31 is suitable for being fixedly installed, for example, fixed to the device housing, such as being fixed at the top of the security inspection channel. The fixed shielding member 31 includes or defines a first movable space, and the first movable space is configured to allow the beam-emitting component 11 of the radiation device 10 to move in the first movable space to send radiation to the detected object 70 after reaching the target position. The movable shielding assembly 32 is suitable for being 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 movable shielding assembly 32 connected thereto; while in other examples, the movable shielding assembly can be driven to move synchronously with the beam-emitting component. Wherein, at any target position, the movable shielding assembly 32 cooperates with the fixed shielding member 31 to form N layers of shielding layers around the beam-emitting component 11, and N is an integer greater than or equal to 1. Wherein, the N layers of shielding layers are configured to shield radiation from radiation outside the beam-emitting direction of the beam-emitting component 11.

[0059] For example, refer to Figure 1 The fixed shielding member 31 may be fixedly mounted on the frame 20, where the fixed mounting means that the position of the fixed shielding member 31 relative to the frame 20 remains unchanged, and the mounting method may include bonding, riveting, nailing, threaded fixing or welding.

[0060] 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.

[0061] In other embodiments, the target position may be determined by a certain area of ​​the inspected object 70. For example, if the inspected object 70 has been scanned before and a suspicious area is found therein, the computer 60 may issue an instruction to move the beam emitting component 11 so as to smoothly send radiation to the suspicious area for re-inspection scanning.

[0062] Reference Figure 1 to Figure 4 Along the y-axis direction, the movable shielding assembly 32 is located above the fixed shielding member 31 , and the movable shielding assembly 32 can move within the range of the first movable space as the beam-emitting component 11 moves.

[0063] Exemplarily, the movable shielding assembly 32 may be fixedly connected to the beam-emitting component 11, or may be detachably connected. Figure 4 The beam outlet 111 of the beam outlet component 11 can pass through the movable shielding assembly 32 . Figure 1 The negative direction of the y-axis is the beam-out direction, such as Figure 1 Send a ray downward along the y-axis.

[0064] Exemplarily, the radiation device 10 may include a driving component connected to the beam-emitting component 11, and drives the beam-emitting component 11 to move to the target position after receiving the movement instruction of the computer 60. In some embodiments, the beam-emitting component 11 simultaneously drives the movable shielding component 32 to move. In other embodiments, the movable shielding component 32 may also be configured with a driving component, and when the beam-emitting component 11 moves, the movable shielding component 32 is driven by the driving force of the driving component and moves synchronously with the beam-emitting component 11.

[0065] 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 shielding layers circumferentially surrounding the beam-emitting component 11. Since the movable shielding assembly 32 moves with the beam-emitting component 11, the N shielding layers, except for the shielding layers belonging to the fixed shielding member 31, also move with it all the time, and cooperate with the fixed shielding layer provided by the fixed shielding member 31 to provide a shielding function at any target position. Refer to Figure 4The fixed shielding member 31 has an opening below, and the opening allows the beam outlet 111 of the beam outlet component 11 to send radiation downward. In addition to the opening below, N shielding layers can shield radiation on either side of the beam outlet component 11.

[0066] According to the embodiment of the present disclosure, in the process of the beam-emitting component 11 of the radiation device 10 moving to the target position in the first movable space, the movable shielding assembly 32 cooperates with the fixed shielding member 31 to always form N shielding layers around the beam-emitting component 11. Since the movable shielding assembly 32 moves relative to the fixed shielding member 31 as the beam-emitting component 11 moves, the defect of the larger overall volume in the related art to accommodate the moving trajectory of the beam-emitting component 11 is overcome, so that the volume does not need to be too large and the weight is small, the structure can be simplified and the cost can be saved, and one or more shielding layers can also effectively reduce the risk of radiation leakage at any target position.

[0067] 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 shielding layer in the M shielding layers and any adjacent shielding layer includes a bending gap.

[0068] The other shielding layers except the M shielding layers among the N shielding layers can shield the radiation from above.

[0069] Exemplarily, 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.

[0070] Reference Figure 4 There is a gap between the fixed shielding member 31 and the movable shielding assembly 32, and the gap defined between each shielding layer is a radiation leakage path. The fixed shielding member 31 and the movable shielding assembly 32 include parts made by a bending process, or the parts are bent and connected, so that the gap defined between at least one shielding layer and any adjacent shielding layer includes a bending gap.

[0071] According to the embodiments of the present disclosure, the curved gap provides a curved leakage path for the radiation, in other words, except for the beam-out direction, the radiation cannot be directly radiated outside the radiation shielding device 30. Therefore, in the process of radiation radiating outward along the curved leakage path, the radiation is gradually absorbed, causing the radiation to gradually weaken, thereby avoiding the risk of radiation leakage harming the human body.

[0072] Fig. 5(a) schematically shows a structural schematic diagram of a fixed shielding member 31 according to an embodiment of the present disclosure. Fig. 5(b) schematically shows a structural schematic diagram of the fixed shielding member 31 in Fig. 5(a) from another perspective according to an embodiment of the present disclosure.

[0073] In some embodiments, as shown in FIG. 5( a) and FIG. 5( b), the fixed shielding member 31 includes a first opening 311 and a second opening 312. A first movable space is formed inside the first opening 311 to allow the beam-emitting component 11 to move within the first opening 311. The second opening 312 is opposite to the first opening 311 along the beam-emitting direction and is interpenetrating with each other. The movable shielding component 32 and the first opening 311 are arranged to allow the beam-emitting component 11 to pass through the movable shielding component 32 and the first opening 311 in sequence along the beam-emitting direction.

[0074] For example, refer to Figure 4 5( a ) and 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 that is in communication with the first opening 311 .

[0075] 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 side walls 520. The first flat plate 510 includes a first opening 311, and the first flat plate 510 is perpendicular to the beam-emitting direction. The first side walls 520 are perpendicular to the first flat plate 510, and each first side wall 520 is connected to a side of the first flat plate 510, and each first side wall 520 is connected around to form a second opening 312. Among them, the N-layer shielding layer includes a first flat plate 510 and a first side wall 520.

[0076] As shown in Fig. 5(a) and Fig. 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.

[0077] 5( a ) and 5 ( b ), the first hollow three-dimensional frame 500 has four first side walls 520 , which are respectively connected to the side edges of the first plate 510 . The four first side walls 520 are connected around and form a second opening 312 .

[0078] In some embodiments, the area of ​​the second opening 312 is greater than the area of ​​the first opening 311 .

[0079] 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 opening 312 and are used to be connected to the frame 20 .

[0080] According to the embodiment of the present disclosure, the solid part of the first plate 510 except the first opening 311 and the first side wall 520 can shield the radiation outside the beam-exiting direction.

[0081] It is particularly noted that the hollow rectangular parallelepiped frame shown in FIG. 5( a) and FIG. 5( b) is only one embodiment of the first hollow three-dimensional frame 500. For example, the first hollow three-dimensional frame 500 may also be a hollow cube frame or other shapes. The present disclosure is not intended to limit the first opening 311 to a rectangle, and may be, for example, a cross shape, an L shape, or other shapes.

[0082] Figure 6 The structural diagram of the first sliding member 321 according to the embodiment of the present disclosure is schematically shown. Figure 7 Schematically illustrates an embodiment of the present disclosure Figure 6 Another perspective structural diagram of the first sliding member 321.

[0083] In some embodiments, Figure 6 and Figure 7 The movable shielding assembly 32 includes a first sliding member 321, which is suitable for connecting with the beam-emitting component 11, and the first sliding member 321 is configured to slide driven by the beam-emitting component 11. The first sliding member 321 and the first opening 311 are arranged to allow the beam-emitting component 11 to pass through the first sliding member 321 and the first opening 311 in sequence along the beam-emitting direction.

[0084] 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, slide along the length direction of the first opening 311 , where the length direction is perpendicular to the beam emitting direction.

[0085] 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 .

[0086] In some embodiments, the first sliding member 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, and the first shielding portion 610 and the first opening 311 are arranged to allow the beam-emitting component 11 to sequentially pass through the first shielding portion 610 and the first opening 311 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. Among them, the N-layer shielding layer includes the first shielding portion 610, the second shielding portion 620, and the third shielding portion 630.

[0087] Reference Figure 6 and Figure 7The first shielding part 610 may be a flat plate, and the second shielding part 620 and the third shielding part 630 are respectively connected to opposite sides of the first shielding part 610. After the rays are sent from the beam-emitting component 11, or leaked from the beam-emitting component 11, the first shielding part 610 may play a shielding role on the upper part, and the second shielding part 620 and the third shielding part 630 may be located on both sides of the circumference of the beam-emitting component 11, defining a bending gap with other components.

[0088] Figure 8 The schematic diagram of the structure of the second sliding member 322 according to the embodiment of the present disclosure is schematically shown. Fig. 9 Schematically illustrates an embodiment of the present disclosure Figure 8 A structural schematic diagram of the second sliding member 322 from another perspective.

[0089] In some embodiments, the movable shielding assembly 32 further includes a second sliding member 322, which is connected to the first sliding member 321, and 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.

[0090] For example, refer to Figure 2 to Figure 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 .

[0091] 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 part of the second accommodating cavity 820 is embedded in the first accommodating cavity 810, and the second accommodating cavity 820 is movable in 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 in the second accommodating cavity 820.

[0092] For example, refer to Figure 3 , Figure 4 , Figure 8 and Fig. 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 in the second accommodating cavity 820.

[0093] In some embodiments, the second accommodating cavity 820 includes a second sidewall 821 . The second sidewall 821 is parallel to the beam-emitting 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 .

[0094] Reference Figure 8 and Fig. 9 , may have four vertical second side walls 821, and the second side walls 821 surround and form a second accommodating cavity 820. Part of the second accommodating cavity 820 is above the first accommodating cavity 810, and the rest of the cavity is inside the first accommodating cavity 810.

[0095] The second side wall 821 surrounds the beam outlet 111 of the beam outlet component 11, and forms a shielding layer in the circumferential direction of the beam outlet 111. A gap is formed between the second side wall 821 and the outer wall of the beam outlet 111, and the gap is connected with the gap formed between the second side wall 821 and the first sliding member 321 to form a bent gap. In some embodiments, the second side wall 821 is bent, and the bent portion 8211 is located at the top of the second side wall 821.

[0096] 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 side wall 832. The second flat plate 831 includes a third opening 8311, the second flat plate 831 is perpendicular to the beam-emitting direction, and at least part of the cavity of the second accommodating cavity 820 is embedded in the third opening 8311. The third side wall 832 is perpendicular to the second flat plate 831, each third side wall 832 is connected to the side of the second flat plate 831, and each third side wall 832 is connected around to form the first accommodating cavity 810. Among them, the N-layer shielding layer includes the second flat plate 831 and the third side wall 832.

[0097] like Figure 8 and Fig. 9 As shown, 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 embedded. The second side wall 821 is perpendicular to the second flat plate 831, and has a portion of the side wall extending upward above the second flat plate 831. Similarly, a portion of the side wall extending downward is provided below the second flat plate 831, so that most of the beam outlet 111 can be surrounded as much as possible in the beam outlet direction to increase the shielding range.

[0098] The second sliding member 322 can be directly placed above the fixed shielding member 31, wherein the second accommodating cavity 820 located 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 in the first opening 311.

[0099] Continue to refer to Figure 8 and Fig. 9 The second hollow three-dimensional frame 830 has four third side walls 832, which are respectively connected to the side edges of the second flat plate 831. The four third side walls 832 are connected to form the first accommodation cavity 810.

[0100] 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 be connected to the first sliding member 321 .

[0101] According to the embodiment of the present disclosure, outside the beam outlet 111, the second side wall 821 first plays a shielding role. Since part of the second accommodating cavity 820 is within the first opening 311, the fixed shielding member 31 also plays a shielding role 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, so the second hollow three-dimensional frame 830 plays a shielding role outside the fixed shielding member 31.

[0102] Therefore, refer to Figure 2 to Figure 9 The M shielding layer may at least include 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 .

[0103] In particular, Figure 8 and Fig. 9 The hollow rectangular parallelepiped frame shown 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 is also not intended to limit the third opening 8311 to a rectangle, for example, it can be a cross shape, L shape or other shapes.

[0104] 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 to move.

[0105] When the second sliding member is driven by the first sliding member to move, the two can be connected via a guide rail and a slider, which will be further described below.

[0106] In some embodiments, the radiation shielding device 30 further includes a guide rail assembly that is 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.

[0107] 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 installed 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 the second guide rail 94 is installed on the opposite second side of the first sliding member 321 and connected to the other opposite side of the first accommodating cavity 810.

[0108] For example, refer to Figure 2 to Figure 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 .

[0109] 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 the first guide rail 93 and connected to one side of the first accommodating cavity 810. The second slider 92 is movably mounted to the second guide rail 94 and connected to the other side opposite to the first accommodating cavity 810.

[0110] For example, refer to Figure 2 to Figure 9 There can be multiple first sliders 91 or second sliders 92, so that the first sliding member 321 is stably connected to the second sliding member 322. The first slider 91 is connected to the first accommodating cavity 810 through the 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 the third flat plate 833 on the other side opposite to the bottom of the first accommodating cavity 810.

[0111] In some embodiments, the first sliding member 321 is configured to slide driven by the beam-emitting component 11, so that: when the second accommodating cavity 820 is movable in 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 the edge of the first opening 311, the first slider 91 moves relatively with the first guide rail 93, and the second slider 92 moves relatively with the second guide rail 94, and the beam-emitting component 11 moves in the second accommodating cavity 820.

[0112] Reference Figures 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 is further described below.

[0113] In some embodiments, the assembly process is as follows: First, the first sliding member 321 is connected to the beam-out component 11, that is, the beam-out port 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-out port 111 is placed in the second accommodating cavity 820 of the second sliding member 322 (for example, after being placed, the bottom of the beam-out port 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 in 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.

[0114] 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 outlet direction.

[0115] 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 of the above embodiment, and 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.

[0116] In some embodiments, the working process is as follows: when the beam-emitting component 11 starts to move toward the target position, the beam-emitting component 11 drives the first sliding member 321 to move along the length direction of the first opening 311 of the fixed shielding member 31. If the second accommodating cavity 820 of the second sliding member 322 can move in the first opening 311, the first sliding member 321 drives the first slider 91 and the second slider 92 through the guide rail assembly, so that the second slider 322 moves synchronously. When the second accommodating cavity 820 moves to the edge of the first opening 311 and is blocked, the first sliding member 321 drives the guide rail assembly to continue to move, and the guide rail assembly and the first slider 91 and the second slider 92 are relatively displaced. At this time, the fixed shielding member 31 and the second sliding member 322 will not move, and the beam outlet 111 moves in the second accommodating cavity 820. No matter where the beam-emitting component 11 moves, its beam outlet 111 is always located inside the fixed shielding member 31 and the movable shielding assembly 32, and the N-layer shielding layer can shield the radiation from the beam-emitting component 11 to the beam-emitting direction other than the beam-emitting direction.

[0117] Fig.10 The flowchart of the radiation shielding method according to the embodiment of the present disclosure is schematically shown.

[0118] like Fig.10 As shown, the radiation shielding method of this embodiment includes operations S1010 to S1040.

[0119] In operation S1010 , a fixed shielding member having a first movable space is provided.

[0120] 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.

[0121] 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-emitting port at the target position to scan the object to be inspected.

[0122] In some embodiments, for example, determining a target position according to a suspicious area of ​​the object to be inspected, and causing the beam-emitting structure to send radiation through a beam-emitting port at the target position to scan the object to be inspected includes:

[0123] The beam-emitting structure is made to send rays through the beam-emitting port at the target position to scan the suspicious area.

[0124] In operation S1030, a movable shielding assembly is provided and connected to a beam-emitting component, so that the movable shielding assembly moves relative to a fixed shielding member as the beam-emitting component moves.

[0125] 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 outside the beam-emitting direction of the beam-emitting component.

[0126] It is understandable that, referring to Figures 1 to 9 The radiation shielding method of this embodiment includes multiple steps corresponding to implementing any of the above device embodiments, which will not be described in detail here.

[0127] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways, even if such combinations and / or combinations are not explicitly described in the present disclosure. In particular, the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways without departing from the spirit and teachings of the present disclosure. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0128] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of 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-layer shielding layer includes 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 to be movable in the second accommodating cavity.

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-out component defining a beam-out port, the beam-out 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, is configured to shield radiation of the rays outside the beam-emitting direction of the beam-emitting component.

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