Switching device for an x-ray detection apparatus and x-ray detection apparatus

Abstract

The application discloses a switching device for an X-ray detection device and the X-ray detection device, the switching device comprising: a pipe assembly comprising an entrance and an exit arranged at two ends; an X-ray shield sleeved in the pipe assembly, the X-ray shield being provided with a through hole penetrating through the X-ray shield at the center; and a baffle assembly movably arranged at one end of the through hole close to the exit to open or shield the through hole; when the baffle assembly shields the through hole, secondary X-rays generated by X-rays irradiated on the baffle through the through hole are irradiated to the inner wall of the through hole and / or irradiated to an X-ray source shielding chamber through the entrance. The switching device of the application has the shielding ability to lateral secondary X-ray radiation through the X-ray shield while maintaining the X-ray beam blocking function.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection equipment, in particular to a switching device for an X-ray detection equipment and the X-ray detection equipment. BACKGROUND

[0002] X-ray detection equipment such as X-ray fluorescence spectrometer (XRF), X-ray diffractometer (XRD), X-ray small-angle scattering instrument (SAXS) and the like utilizes X-ray excitation source. When it irradiates to a sample, it will have complex interaction with the substance, thereby generating diffraction, scattering and fluorescence and the like. Fine detection and analysis of these signals provide a powerful means for industrial quality detection, material structure analysis, biomedical and the like. X-ray is an electromagnetic wave with a wavelength of 0.01-100 nm, which has strong penetration and can cause great harm to human health. However, X-ray detection equipment needs high-flux X-ray source to improve the sensitivity of the instrument, and in different application scenarios, X-rays with shorter wavelength and stronger penetration are often selected, which further increases the safety hidden trouble of X-ray irradiation and leakage. Therefore, X-ray beam blockers and radiation shielding devices are equipped on X-ray detection equipment to reduce the radiation dose and provide convenience and safety for the operator and the instrument.

[0003] Figure 1 It is a structural schematic diagram of the existing X-ray detection equipment. The light emitted by the X-ray light source is guided to the sample position to be tested through the X-ray transmission light path, and the signal generated by the excitation of the sample enters the detector through the signal transmission light path. The X-ray switch and the anti-radiation shielding chamber are arranged on the X-ray transmission light path. Figure 2 It is a structural schematic diagram of the existing X-ray switch. The X-ray switch is a key component for opening and closing the X-ray beam. The shutter made of tungsten or other high-density materials is controlled by a precision driving system to realize accurate control of the X-ray beam. When the X-ray switch is in the open state, since the light beam is parallel or focused, there is no irradiation and interaction between the X-ray switch shutter and the structure side wall on the X-ray propagation path. At this time, there is no radiation leakage risk in the vacuum X-ray switch section. When the switch is in the closed state, in addition to being absorbed and attenuated, the X-ray beam will also produce secondary X-rays such as large-angle parasitic scattering and fluorescence with strong penetration when it reaches the shielding shutter, causing serious radiation leakage. The existing design of the X-ray switch only considers blocking the straight-through light beam, but ignores the shielding of the secondary X-rays. In order to eliminate the risk of secondary X-ray radiation leakage, an X-ray switch shielding chamber needs to be set outside the main structure of the X-ray switch. However, this kind of way not only increases the difficulty of system design and the risk of radiation leakage, but also reduces the convenience, flexibility and safety of the equipment. SUMMARY

[0004] Therefore, the application provides a switching device for an X-ray detection device and the X-ray detection device to solve the problem that the switching device of the existing X-ray detection device does not have the ability to eliminate secondary X-ray radiation and has radiation leakage.

[0005] To solve the above technical problems, the application adopts one technical solution: providing a switching device for an X-ray detection device, which comprises: a pipeline assembly comprising an entrance and an exit arranged at two ends; an X-ray shielding member sleeved in the pipeline assembly, wherein the center of the X-ray shielding member is provided with a circular through hole penetrating through the X-ray shielding member; and a baffle assembly movably arranged at one end of the circular through hole close to the exit to open or shield the circular through hole; when the baffle assembly shields the circular through hole, the secondary X-ray generated by the X-ray irradiated on the baffle through the circular through hole irradiates the inner wall of the circular through hole and / or irradiates the X-ray source shielding chamber through the entrance.

[0006] As a further improvement of the application, the pipeline assembly comprises a vacuum tube and first and second connecting members arranged at two ends of the vacuum tube respectively, the first connecting member is used to be connected to the window of the X-ray source shielding chamber, and the second connecting member is used to be connected to the window of the detector shielding chamber.

[0007] As a further improvement of the application, the X-ray shielding member comprises a shielding cylinder made of a metal material with strong X-ray absorption capacity, and the outer side surface of the shielding cylinder closely abuts the inner side wall of the pipeline assembly.

[0008] As a further improvement of the application, the maximum distance from the center of the through hole to the inner wall of the through hole and the length of the through hole, the diameter of the pipeline assembly and the distance from one end of the through hole close to the entrance to the entrance are all set in advance, so that among the secondary X-rays generated by the X-rays irradiated on the baffle, the secondary X-rays satisfying a first propagation angle irradiate the inner wall of the through hole, and the secondary X-rays satisfying a second propagation angle propagate to the X-ray source shielding chamber through the entrance.

[0009] As a further improvement of the application, the first propagation angle and the second propagation angle are determined based on the maximum distance from the center of the through hole to the inner wall of the through hole and the length of the through hole, the first propagation angle is expressed as: and The second propagation angle is expressed as: Wherein, A represents the maximum distance from the center of the through hole to the inner wall of the through hole, and B represents the length of the through hole.

[0010] As a further improvement of the application, the maximum distance from the center of the through hole to the inner wall of the through hole and the length of the through hole, the diameter of the pipeline assembly and the distance from one end of the through hole close to the entrance to the entrance satisfy the following relationship: Wherein, C represents the distance from the end of the through hole close to the light inlet to the light inlet, and D represents the diameter of the pipeline assembly.

[0011] As a further improvement of the present application, the through hole is a circular through hole, and the maximum distance from the center of the through hole to the inner wall of the through hole is the radius of the circular through hole.

[0012] As a further improvement of the present application, the shutter assembly comprises a shutter and a shutter driving system, the shutter is movably arranged at the end of the through hole close to the light outlet, the output end of the shutter driving system is connected to the shutter, the diameter of the shutter is greater than the diameter of the through hole, and the shutter driving system drives the shutter according to an external input instruction to open or shield the through hole.

[0013] As a further improvement of the present application, the end of the X-ray shielding member close to the shutter is provided with a groove, the shutter is movably arranged in the groove, and the shutter is arranged at a preset distance from the X-ray shielding member.

[0014] As a further improvement of the present application, the depth of the groove is greater than the preset distance.

[0015] To solve the above technical problems, another technical solution adopted by the present application is to provide an X-ray detection device, which comprises an X-ray source, an X-ray source shielding chamber, and a switching device for the X-ray detection device as described above, the X-ray source is arranged in the X-ray source shielding chamber, a window is arranged on the X-ray source shielding chamber, and the light inlet of the switching device is in communication with the window.

[0016] The beneficial effects of the present application are as follows: the switching device for the X-ray detection device of the present application sets the X-ray shielding member in the pipeline assembly, and sets the through hole in the X-ray shielding member to provide a propagation path for X-rays, and when the shutter assembly shields the through hole, among the secondary X-rays generated by the X-ray irradiation on the shutter assembly and propagating in various directions, the secondary X-rays irradiated to the inner wall of the through hole are absorbed by the X-ray shielding member, and the secondary X-rays reflected to the outside of the through hole return to the X-ray source shielding chamber through the light inlet, which not only can control the on-off of the X-ray beam, but also can avoid the secondary X-rays irradiating to the pipeline assembly with weak anti-radiation ability, thereby reducing the risk of secondary X-ray leakage, and without the need to additionally design a heavy radiation shielding chamber for the switching device, the manufacturing cost of the device is reduced, and the use convenience and flexibility of the device are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure of the existing X-ray detection device is shown;

[0018] Figure 2 The structure of the existing X-ray switch is shown;

[0019] Figure 3is a structural schematic diagram of a switching device for an X-ray detection device according to an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a propagation angle of secondary X-rays of a switching device for an X-ray detection device according to an embodiment of the present application;

[0021] Figure 5 is a structural schematic diagram of an X-ray detection device according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0023] The terms "first", "second", "third" in the present application are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0024] In this document, reference to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. A person of ordinary skill in the art will understand that an embodiment described herein can be combined with another embodiment.

[0025] Figure 3 is a structural schematic diagram of a switching device for an X-ray detection device according to an embodiment of the present application. As Figure 3As shown, the switch device for the X-ray detection equipment comprises a pipeline assembly 1, an X-ray shield 2 and a shutter assembly 3.

[0026] The pipeline assembly 1 comprises a light inlet 1a and a light outlet 1b arranged at two ends. Specifically, the pipeline assembly 1 is mainly used for providing a light path for X-rays and maintaining a vacuum state in the pipeline assembly 1, and is usually made of stainless steel, which has poor radiation protection capability. The light inlet 1a is used for connecting an X-ray source shielding chamber, and the light outlet 1b is used for connecting a detector shielding chamber. An X-ray beam emitted by an X-ray source passes through the pipeline assembly 1 and then irradiates on a sample in the detector shielding chamber. It should be noted that the pipeline assembly 1 can also be arranged in a non-vacuum state, which is not limited by the present application.

[0027] The X-ray shield 2 is sleeved in the pipeline assembly 1, and a through hole 21 penetrating through the X-ray shield 2 is arranged at the center of the X-ray shield 2. The X-ray shield 2 is made of a material with high density and strong X-ray absorption capability, such as tungsten, tantalum, etc. The through hole 21 penetrating through the X-ray shield 2 is on the propagation path of the X-ray beam, and the propagation path of the X-ray beam is preferably coincident with the center line of the through hole 21. It should be noted that the size of the through hole 21 can be designed according to the size of the X-ray beam.

[0028] The shutter assembly 3 is movably arranged at one end of the through hole 21 close to the light outlet 1b to open or shield the through hole 21. The shutter assembly 3 is also made of a material with high density and strong X-ray absorption capability, and is movably arranged on the propagation path of the X-ray to release or cut off the X-ray beam in the main light path direction of the X-ray.

[0029] In this embodiment, when the shutter assembly 3 shields the through hole 21, the secondary X-rays generated by the X-rays passing through the through hole 21 and irradiating on the shutter are irradiated on the inner wall of the through hole 21 and / or pass through the light inlet 1a and irradiate on the X-ray source shielding chamber. Specifically, when the X-ray source works, the X-ray beam emitted by the X-ray source enters the pipeline assembly 1 through the light inlet 1a of the pipeline assembly 1 and then passes through the through hole 21. At this time, if the shutter assembly 3 does not shield the through hole 21, the X-ray beam directly passes through the light outlet 1b of the pipeline assembly 1 and propagates to the detector shielding chamber to detect the sample; if the shutter assembly 3 shields the through hole 21, the X-ray beam irradiates on the shutter assembly 3, and in addition to being attenuated by the absorption of the shutter assembly 3, it also generates secondary X-rays such as large-angle parasitic scattering and fluorescence with strong penetration. These secondary X-rays are either irradiated on the inner wall of the through hole 21 and absorbed by the X-ray shield 2, or emitted from the other end of the through hole 21 and propagated to the X-ray source shielding chamber through the light inlet 1a of the pipeline assembly 1, thereby avoiding the leakage of secondary X-rays.

[0030] The switch device for the X-ray detection equipment of the embodiment provides a propagation path for X-rays by setting an X-ray shield 2 in the pipeline assembly 1 and setting a through hole 21 in the X-ray shield 2, and when the shutter assembly 3 blocks the through hole 21, the secondary X-rays generated by the X-rays irradiated on the shutter assembly 3 propagate to various angles, the secondary X-rays irradiated to the inner wall of the through hole 21 are absorbed by the X-ray shield 2, and the secondary X-rays reflected to the outside of the through hole 21 pass through the light inlet 1a and return to the X-ray source shielding chamber, which not only can control the on-off of the X-ray beam, but also can avoid the secondary X-rays irradiated to the pipeline assembly 1 with weak anti-radiation ability, reduce the risk of secondary X-ray leakage, and does not need to design a heavy radiation shielding chamber for the switch device, thereby reducing the manufacturing cost of the equipment and improving the use convenience and flexibility of the equipment.

[0031] Further, in the embodiment, the pipeline assembly 1 includes a vacuum tube 11, and a first connecting piece 12 and a second connecting piece 13 arranged at two ends of the vacuum tube 11 respectively, the first connecting piece 12 is used for connecting to the window of the X-ray source shielding chamber, and the second connecting piece 13 is used for connecting to the window of the detector shielding chamber.

[0032] Specifically, the first connecting piece 12 and the second connecting piece 13 preferably adopt flanges. It should be noted that the distance from the end of the through hole 21 close to the light inlet 1a to the light inlet 1a is the distance from the through hole 21 to the side surface of the flange, and the flange cannot be irradiated by the secondary X-rays and has a risk of radiation leakage.

[0033] Further, the X-ray shield 2 includes a shielding cylinder made of a metal material with strong X-ray absorption capacity, and the outer side surface of the shielding cylinder is close to the inner side wall of the pipeline assembly 1.

[0034] Further, in order to ensure that the secondary X-rays irradiated from various angles can be absorbed by the X-ray shield 2 and / or propagated to the X-ray source shielding chamber, in the embodiment, the maximum distance from the center of the through hole 21 to the inner wall of the through hole, the length of the through hole, the diameter of the pipeline assembly 1, and the distance from the end of the through hole 21 close to the light inlet 1a to the light inlet 1a are all set in advance, so that among the secondary X-rays generated by the X-rays irradiated on the shutter, the secondary X-rays satisfying a first propagation angle are irradiated to the inner wall of the through hole 21, and the secondary X-rays satisfying a second propagation angle are propagated to the X-ray source shielding chamber through the light inlet 1a.

[0035] The first propagation angle and the second propagation angle are determined based on the maximum distance from the center of the through hole 21 to the inner wall of the through hole and the length of the through hole, and the first propagation angle is represented as: and The second propagation angle is represented as: Where A represents the maximum distance from the center of the through hole 21 to the inner wall of the through hole, and B represents the length of the through hole 21.

[0036] It is important to understand that the shape of the through-hole 21 is not limited in this embodiment. Any shape that ensures the normal passage of X-rays is acceptable; that is, the X-ray propagation path should be within the through-hole 21. Furthermore, for a regularly shaped through-hole, the X-ray propagation path passes through its center point, such as a circle or a regular polygon. Therefore, the center of the through-hole is the center of the circle or the center of the regular polygon. For irregular shapes, the center of the through-hole in this embodiment refers to a point on the X-ray propagation path. Therefore, when calculating the first and second propagation angles, to ensure that secondary X-rays emitted from the through-hole 21 do not irradiate the pipe assembly 1, this embodiment uses the maximum distance from the center of the through-hole 21 to its inner wall as a reference. If the secondary X-rays emitted from the position corresponding to this maximum distance satisfy the second propagation angle, then the secondary X-rays emitted from any position of the baffle assembly 3 should also satisfy the second propagation angle, thus preventing secondary X-rays from irradiating the pipe assembly 1.

[0037] like Figure 4 As shown, the propagation path of the X-ray beam coincides with the centerline of the pipe assembly 1 and the centerline of the through hole 21. Moreover, the size of the X-ray beam is usually much smaller than the distance between the center and the inner wall of the through hole 21. Therefore, it can be understood that the point where the secondary X-rays are generated is mainly located at the intersection of the centerline of the through hole 21 and the baffle assembly 3. In order to ensure that the secondary X-rays are absorbed by the X-ray shield 2 and / or propagated to the X-ray source shielding chamber, this embodiment sets the maximum distance from the center of the through hole 21 to the inner wall of the through hole, the length of the through hole, the diameter of the pipe assembly 1, and the distance from the end of the through hole 21 near the light inlet 1a to the light inlet 1a, so that the secondary X-rays are either absorbed by the X-ray shield 2 or propagated to the X-ray source shielding chamber, and will not irradiate the pipe assembly 1, which has poor radiation protection capabilities.

[0038] Specifically, in this embodiment, taking the X-ray propagation direction as a reference, the critical angle between the secondary X-rays irradiating the inner wall of the through-hole 21 and the secondary X-rays propagating from the through-hole 21 is calculated based on inverse trigonometric functions, and expressed as follows: That is, when the angle of propagation is and When the secondary X-rays are at a certain angle, they will directly irradiate the inner wall of the through-hole 21 and will not propagate outside the through-hole 21; while when the propagation angle is... At this time, secondary X-rays will be emitted from the through-hole 21. By setting the diameter of the pipe assembly 1 and the distance from the end of the through-hole 21 near the light inlet 1a to the light inlet 1a, the propagation angle is made such that... The secondary X-rays also do not irradiate the pipe assembly 1, but instead propagate directly from the light inlet 1a into the X-ray source shielding chamber, so the propagation angle is... Secondary X-rays will also propagate from the light inlet 1a into the X-ray source shielding chamber.

[0039] The maximum distance and length from the center of the through hole 21 to the inner wall of the through hole, the diameter of the pipe assembly 1, and the distance from the end of the through hole 21 near the light inlet 1a to the light inlet 1a satisfy the following relationship:

[0040]

[0041] Wherein, C represents the distance from the end of the through hole 21 near the light inlet 1a to the light inlet 1a, and D represents the diameter of the pipe assembly 1.

[0042] Specifically, in this embodiment, the critical value of the distance from the end of the through-hole 21 near the light inlet 1a to the light inlet 1a is calculated based on the distance from the end of the through-hole 21 near the light inlet 1a to the light inlet 1a, the diameter of the pipe assembly 1, and the diameter and length of the through-hole 21 for the secondary X-rays to propagate to the X-ray source shield.

[0043]

[0044] get, Therefore, in order to avoid secondary X-rays irradiating the pipe assembly 1, the diameter and length of the through hole 21, the diameter of the pipe assembly 1, and the distance from the end of the through hole 21 near the light inlet 1a to the light inlet 1a must satisfy the following conditions: conditions.

[0045] Furthermore, in this embodiment, the through hole is a circular through hole, and the maximum distance from the center of the through hole to the inner wall of the through hole is the radius of the circular through hole.

[0046] Furthermore, in this embodiment, as Figure 2 As shown, the baffle assembly 3 includes a baffle 31 and a baffle driving system 32. The baffle 31 is movably disposed at one end of the through hole 21 near the light outlet 1b. The output end of the baffle driving system 32 is connected to the baffle 31. The diameter of the baffle 31 is larger than the diameter of the through hole 21. The baffle driving system 32 drives the baffle according to an external input command to open or block the through hole 21.

[0047] Specifically, the baffle drive system 32 includes a controller and a power output device. The controller is used to receive and execute external commands, and the power output device is used to provide power for the movement of the baffle 31. Through the drive of the baffle drive system 32, the baffle 31 can open or block the through hole 21.

[0048] Further, in order to prevent abrasion between the baffle 31 and the X-ray shield 2, affect the service life of the baffle 31 and the X-ray shield 2 and the radiation shielding effect, on the basis of the above embodiment, in other embodiments, the X-ray shield 2 is provided with a groove 22 adjacent to one end of the baffle 31, and the baffle 31 is movably arranged in the groove 22, and the baffle 31 is spaced apart from the X-ray shield 2 by a predetermined distance.

[0049] Specifically, the predetermined distance is a small gap, such as a gap of 1 mm or 2 mm wide, and in order to prevent secondary X-rays from being transmitted from the gap and directly irradiating on the pipeline assembly 1, the embodiment sets the X-ray shield 2 adjacent to one end of the baffle as a groove 22, and then sets the baffle 31 in the groove 22, so that the secondary X-rays transmitted from the gap are irradiated on the inner side wall of the groove 22 and are absorbed by the X-ray shield 2, and will not irradiate on the pipeline assembly 1 to cause radiation leakage.

[0050] Further, in order to ensure that all secondary X-rays transmitted from the gap are absorbed by the X-ray shield 2, the depth of the groove 22 is greater than the predetermined distance.

[0051] Specifically, with the X-ray propagation direction as the reference, the maximum propagation angle of the secondary X-rays is close to 90° or -90°, that is, close to parallel to the baffle, so only the depth of the groove 22 needs to be set to be greater than the predetermined distance, so that the secondary X-rays with the maximum angle of propagation will not irradiate outside the groove 22, thereby avoiding the secondary X-rays irradiating on the pipeline assembly 1.

[0052] Figure 5 is a structural schematic diagram of an X-ray detection device according to an embodiment of the present application. As shown in Figure 5 the X-ray detection device includes an X-ray source 100, an X-ray source shielding chamber 200 and the switching device 300 for the X-ray detection device according to any one of the above embodiments, the X-ray source 100 is arranged in the X-ray source shielding chamber 200, the X-ray source shielding chamber 200 is provided with a window, and the light inlet 1a of the switching device is in communication with the window.

[0053] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or in the form of software functional unit. The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A switching device for X-ray inspection equipment, characterized in that, It includes: A pipeline assembly, the pipeline assembly including an inlet and an outlet at both ends; The X-ray shield is made of a high-density material with strong X-ray absorption capacity; the X-ray shield is fitted inside the pipe assembly, and a through hole is provided at the center of the X-ray shield; A baffle assembly is movably disposed at one end of the through hole near the light outlet to open or block the through hole; When the baffle assembly blocks the through hole, X-rays emitted from the X-ray source shielding chamber pass through the through hole and irradiate the baffle assembly. In addition to being absorbed and attenuated by the baffle assembly, secondary X-rays are also generated. These secondary X-rays irradiate the inner wall of the through hole and are absorbed by the X-ray shielding component and / or pass through the light inlet and irradiate the X-ray source shielding chamber.

2. The switching device for X-ray detection equipment according to claim 1, characterized in that, The pipeline assembly includes a vacuum tube and a first connector and a second connector respectively disposed at both ends of the vacuum tube. The first connector is used to connect to the window of the X-ray source shielding chamber, and the second connector is used to connect to the window of the detector shielding chamber.

3. The switching device for X-ray detection equipment according to claim 1, characterized in that, The X-ray shielding component includes a shielding cylinder made of a metallic material with strong X-ray absorption capability, the outer side of which is in close contact with the inner wall of the pipe assembly.

4. The switching device for X-ray detection equipment according to claim 1, characterized in that, The maximum distance from the center of the through hole to the inner wall of the through hole, the length of the through hole, the diameter of the pipe assembly, and the distance from the end of the through hole near the light inlet to the light inlet are all preset so that, among the secondary X-rays generated by the X-rays irradiating the baffle, secondary X-rays satisfying the first propagation angle irradiate the inner wall of the through hole with reference to the X-ray propagation direction, and secondary X-rays satisfying the second propagation angle pass through the light inlet and propagate to the X-ray source shielding chamber.

5. The switching device for X-ray detection equipment according to claim 4, characterized in that, The first propagation angle and the second propagation angle are determined based on the maximum distance from the center of the through hole to the inner wall of the through hole and the length of the through hole. The first propagation angle is expressed as: and The second propagation angle is expressed as: Where A represents the maximum distance from the center of the through hole to the inner wall of the through hole, and B represents the length of the through hole.

6. The switching device for X-ray detection equipment according to claim 5, characterized in that, The maximum distance from the center of the through hole to the inner wall of the through hole, the length of the through hole, the diameter of the pipe assembly, and the distance from the end of the through hole near the light inlet to the light inlet satisfy the following relationship: Wherein, C represents the distance from the end of the through hole near the light inlet to the light inlet, and D represents the diameter of the pipe assembly.

7. The switching device for X-ray inspection equipment according to claim 1, 4, 5, or 6, characterized in that, The through hole is a circular through hole, and the maximum distance from the center of the through hole to the inner wall of the through hole is the radius of the circular through hole.

8. The switching device for X-ray detection equipment according to claim 1, characterized in that, The baffle assembly includes a baffle and a baffle driving system. The baffle is movably disposed at one end of the through hole near the light outlet. The output end of the baffle driving system is connected to the baffle. The diameter of the baffle is larger than the diameter of the through hole. The baffle driving system drives the baffle according to an external input command to open or block the through hole.

9. The switching device for X-ray detection equipment according to claim 8, characterized in that, The X-ray shield is provided with a groove at one end adjacent to the baffle, the baffle is movably disposed in the groove, and the baffle and the X-ray shield are spaced apart by a preset distance.

10. The switching device for X-ray detection equipment according to claim 9, characterized in that, The depth of the groove is greater than the preset distance.

11. An X-ray inspection device, characterized in that, It includes an X-ray source, an X-ray source shielding chamber, and a switching device for X-ray detection equipment as described in any one of claims 1-10. The X-ray source is disposed in the X-ray source shielding chamber, and the X-ray source shielding chamber has a window. The light inlet of the switching device is connected to the window.

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