Stepless filter and X-ray equipment

Abstract

The present invention discloses a stepless adjustment filter device and an X-ray device, which belongs to the field of medical devices. The stepless adjustment filter device includes a support component, a filter component and a drive component, wherein the filter component includes an upper filter and a lower filter, the lower filter is arranged on the support component, the upper filter is arranged above the lower filter, the sides of the upper filter and the lower filter facing each other are arranged as inclined surfaces, the inclined angles of the inclined surfaces of the upper filter and the lower filter are consistent, and the ray beam passes through the upper filter and the lower filter in sequence; the drive component is arranged on the support component, and its output end is connected to the upper filter in a transmission manner to drive the upper filter to make a linear reciprocating motion in the horizontal direction to adjust the sum of the propagation paths of the ray beam in the upper filter and the lower filter. The present invention realizes the adjustment of the filtration thickness according to different filtration requirements through the arrangement of the above structure.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to a stepless adjustment filtering device and an X-ray device. Background Art

[0002] X-rays are actually a type of electromagnetic wave with a very short wavelength, about 0.01-10 nanometers. They are produced when the high-speed electron flow in the CT tube hits a metal target and are mainly used in medical diagnosis.

[0003] The spectrum of X-rays is usually continuous, so the ray components are relatively rich. According to the energy size, they can be divided into low-energy rays and high-energy rays. Low-energy rays are usually called "soft rays". They have the disadvantage of poor penetration ability and are almost impossible to perform X-ray imaging, so they will increase the patient's absorbed dose. In order to reduce the unnecessary damage caused by rays to the human body, "pre-hardening" measures are usually taken, and certain materials (such as copper sheets, aluminum sheets, etc.) are used to form a filter plate of a certain thickness to filter out the soft rays in the X-ray beam. For different parts of the body, in order to obtain images of uniform density and reduce the radiation dose, filter plates with different "hardening" degrees can be used, and the thickness and material of the filter plates can be changed, so as to achieve the purpose of blocking "soft rays" of different energies when scanning different parts of the body. According to different filtering needs, different filtering effects can be achieved by replacing filter plates of different thicknesses, but replacing filter plates of different thicknesses cannot achieve precise adjustment, and the replacement operation is relatively inconvenient. Summary of the invention

[0004] The object of the present invention is to provide a stepless adjustment filter device to solve the technical problems in the prior art that accurate adjustment cannot be achieved by replacing filter plates of different thicknesses and the replacement operation is relatively inconvenient.

[0005] As conceived above, the technical solution adopted by the present invention is:

[0006] Stepless adjustable filtering device, including:

[0007] Support components;

[0008] A filter assembly, comprising an upper filter and a lower filter, wherein the lower filter is disposed on the support assembly, the upper filter is disposed above the lower filter, the sides of the upper filter and the lower filter facing each other are arranged as inclined surfaces, the inclined angles of the inclined surfaces of the upper filter and the lower filter are consistent, and the radiation beam passes through the upper filter and the lower filter in sequence; and

[0009] A driving assembly is arranged on the supporting assembly, and an output end of the driving assembly is connected to the upper filter plate in a transmission manner to drive the upper filter plate to perform linear reciprocating motion in a horizontal direction to adjust the sum of the propagation paths of the radiation beam in the upper filter plate and the lower filter plate.

[0010] The filter assembly of the steplessly adjustable filter device comprises an upper filter and a lower filter. The upper filter is arranged above the lower filter. The sides of the upper filter and the lower filter facing each other are arranged as inclined surfaces. The inclination angles of the inclined surfaces of the upper filter and the lower filter are consistent. The ray beam passes through the upper filter and the lower filter in sequence. The output end of the drive assembly is transmission-connected to the upper filter to drive the upper filter to make a linear reciprocating motion in the horizontal direction to adjust the sum of the propagation paths of the upper filter and the lower filter, thereby realizing stepless adjustment of the filter thickness according to different filtering requirements, and the adjustment is relatively convenient.

[0011] As a preferred solution of the above-mentioned stepless adjustment filtering device, the upper filter plate is fixedly arranged on the supporting assembly, the lower filter plate is spaced apart from the upper filter plate, and the gap between the lower filter plate and the upper filter plate is filled with lipid medium.

[0012] The upper filter plate and the lower filter plate are arranged at intervals, which simplifies the arrangement of the stepless filter device, reduces the manufacturing cost of the stepless filter device, and avoids the lower filter plate hindering the movement of the upper filter plate when the upper filter plate has a large movement range.

[0013] As a preferred solution of the above-mentioned stepless adjustable filtering device, an elastic component is arranged on the supporting component, the lower filter plate is elastically supported on the elastic component along the vertical direction, and the upper filter plate and the lower filter plate are in contact with each other.

[0014] An elastic component is arranged on the lower filter plate along the vertical direction. When the upper filter plate and the lower filter plate are in contact with each other, the driving component drives the upper filter plate to move in the horizontal direction. Under the action of the elastic component, the upper filter plate drives the lower filter plate to move downward, thereby adjusting the filtering thickness of the upper filter plate and the lower filter plate to prevent the lower filter plate from obstructing the movement of the upper filter plate. In addition, the upper filter plate and the lower filter plate are in contact with each other, thereby improving the filtering effect and accuracy.

[0015] As a preferred solution of the above-mentioned stepless adjustment filtering device, the elastic component includes:

[0016] A support frame, comprising a base and a mounting rod connected to each other, wherein the base is arranged on the support assembly, and the mounting rod is passed through the lower filter plate; and

[0017] An elastic member is sleeved on the mounting rod, and one end of the elastic member abuts against the bottom of the lower filter plate, and the other end abuts against the base.

[0018] A support frame is arranged between the elastic member and the support assembly, and the support frame includes a base and a mounting rod. The base improves the supporting stability of the elastic member, and the mounting rod provides a guide for the extension and recovery of the elastic member. The setting of the support frame effectively improves the working efficiency of the elastic member and increases the stability of the elastic member.

[0019] As a preferred solution of the above-mentioned stepless adjustable filtering device, flange structures are provided on both sides of the inclined surface of the lower filter plate, and the upper filter plate is slidably disposed between the two flange structures.

[0020] By arranging flange mechanisms on both sides in the horizontal direction, the movement of the upper filter plate is guided, thereby improving the stability of the upper filter plate in linear motion in the horizontal direction.

[0021] As a preferred solution of the above-mentioned stepless adjustment filtering device, the support assembly includes:

[0022] a first support seat, wherein a first through hole is disposed on the first support seat, the lower filter is disposed on the first support seat, and the ray beam passes through the upper filter and the lower filter and is emitted from the first through hole; and

[0023] The second support seat is arranged on the first support seat, and the driving component is arranged on the first support seat.

[0024] The upper filter is supported by the first support seat, and the first through hole on the support seat enables the radiation beam to pass through the support seat to avoid blocking the radiation beam; the second support seat effectively disperses the pressure of the entire support assembly on the driving assembly, thereby improving the overall stability of the stepless adjustment filter device.

[0025] As a preferred solution of the above-mentioned stepless adjustment filtering device, the material of the upper filter plate and the lower filter plate is copper, aluminum or a copper-aluminum composite material.

[0026] By setting the materials of the upper filter and the lower filter to copper, aluminum or a copper-aluminum composite material, the low-energy components in the X-ray beam can be absorbed in advance, thereby increasing the filtering effect of the filter on the soft ray components in the ray beam.

[0027] As a preferred solution of the above-mentioned stepless adjustment filtering device, the driving assembly includes:

[0028] A driving motor is arranged on the supporting assembly;

[0029] A spiral rod connected to the output end of the driving motor, the driving motor drives the spiral rod to rotate, and the spiral rod is threadedly connected to the upper filter plate; and

[0030] A guide rod is connected to the support assembly, and the upper filter plate is slidably arranged on the guide rod.

[0031] The drive assembly is arranged on the upper filter plate as a threaded guide structure, which has the advantages of simple structure, reliable connection, and convenient assembly and disassembly. At the same time, the arrangement of the guide rod can prevent the upper filter plate from rotating, ensuring that the upper filter plate only moves in the horizontal direction.

[0032] As a preferred solution of the above-mentioned steplessly adjustable filtering device, the steplessly adjustable filtering device also includes: a beam limiter, which is arranged on the supporting assembly and located above the upper filter plate, and a second through hole is opened on the beam limiter, and the beam of rays is incident on the filtering assembly through the second through hole.

[0033] The irradiation range of the X-ray emitter is controlled by setting a beam limiter to meet the needs of X-ray imaging and diagnosis.

[0034] The X-ray device comprises a frame, an X-ray emitter and the above-mentioned stepless adjustment and filtering device, wherein a scanning window is arranged on the frame, the X-ray emitter and the stepless adjustment and filtering device are both arranged on the top of the scanning window, and the X-ray emitter is located above the stepless adjustment and filtering device.

[0035] The X-ray emitter and the stepless filter adjustment device are both arranged at the top of the scanning window, making the overall human body scanning more convenient and realizing stepless adjustment of the filter thickness according to different filtering requirements.

[0036] Beneficial effects of the present invention:

[0037] The present invention proposes a stepless adjustment filter device, in which the filter component includes an upper filter plate and a lower filter plate, the upper filter plate is arranged above the lower filter plate, and the sides of the upper filter plate and the lower filter plate facing each other are arranged as inclined surfaces, the inclination angles of the inclined surfaces of the upper filter plate and the lower filter plate are consistent, and the ray beam passes through the upper filter plate and the lower filter plate in turn. The output end of the drive component is transmission-connected to the upper filter plate to drive the upper filter plate to make a linear reciprocating motion in the horizontal direction to adjust the sum of the propagation paths of the upper filter plate and the lower filter plate, thereby realizing stepless adjustment of the filter thickness according to different filtering requirements, and the adjustment is relatively convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of the structure of an X-ray device provided in Embodiment 1 of the present invention;

[0039] Figure 2 is a schematic structural diagram of a stepless adjustment filtering device provided in Embodiment 1 of the present invention;

[0040] Figure 3is a cross-sectional view of a stepless adjustment filter device provided in Embodiment 1 of the present invention;

[0041] Figure 4 is a schematic structural diagram of a stepless adjustment filtering device provided in Embodiment 2 of the present invention;

[0042] Figure 5 is a cross-sectional view of a stepless adjustment filter device provided in Embodiment 2 of the present invention;

[0043] Figure 6 It is a half-section view of the left extreme position of the stepless adjustment filtering device provided in the second embodiment of the present invention.

[0044] In the figure:

[0045] 1. Stepless adjustment filter device;

[0046] 11. Support assembly; 111. First support seat; 1111. First through hole; 112. Second support seat;

[0047] 12. filter assembly; 121. upper filter plate; 122. lower filter plate; 1221. flange structure; 1222. stopper;

[0048] 13. driving assembly; 131. driving motor; 132. screw rod; 133. guide rod;

[0049] 14. elastic component; 141. support frame; 142. elastic member;

[0050] 15. beam limiter; 151. second through hole;

[0051] 2. Frame; 21. Scanning window;

[0052] 3. X-ray emitter;

[0053] 4. CT scanning bed. DETAILED DESCRIPTION

[0054] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0055] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0057] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0058] Embodiment 1:

[0059] like Figure 1 As shown, the present invention proposes an X-ray device, including a frame 2, an X-ray emitter 3, a CT scanning bed 4 and a stepless adjustment filter device 1, wherein a scanning window 21 is arranged on the frame 2, the X-ray emitter 3 and the stepless adjustment filter device 1 are both arranged on the top of the scanning window 21, and the X-ray emitter 3 is located above the stepless adjustment filter device 1, the CT scanning bed 4 is arranged to move horizontally, and the CT scanning bed 4 can move into the scanning window 21, and the CT scanning bed 4 is used to drive the human body to move into the scanning window 21 or out of the scanning window 21 along its extension direction. The X-ray emitter 3 and the stepless adjustment filter device 1 are both arranged on the top of the scanning window 21, so that the overall human body scanning is more convenient, and the filter thickness can be infinitely adjusted according to different filtering requirements. During operation, the human body lies on the CT scanning bed 4, and the CT scanning bed 4 moves horizontally into the scanning window 21. The X-ray equipment uses highly sensitive instruments to measure the human body according to the different absorption and transmittance of X-rays by different tissues of the human body, and then inputs the measured data into an electronic computer. After the electronic computer processes the data, it takes a cross-sectional or three-dimensional image of the examined part of the human body, thereby detecting small lesions in any part of the body.

[0060] In the prior art, different filtering effects are achieved by replacing filter plates of different thicknesses. However, the disadvantage is that precise adjustment cannot be achieved by replacing filter plates of different thicknesses, and the replacement operation is relatively inconvenient. Therefore, the present invention proposes a stepless adjustment filtering method for different filtering needs.

[0061] Specifically, the intensity of X-rays is defined as , is the incident ray intensity, I is the outgoing ray intensity, μ is the effective linear attenuation coefficient of the substance, x is the thickness of the material. When the material through which the X-ray beam passes remains unchanged, μ If unchanged, x function, that is, the thickness of the material through which the X-ray beam penetrates can be adjusted x To adjust I The strength of Figure 2 and Figure 3 As shown, the stepless adjustment filtering device 1 includes a supporting component 11, a filtering component 12 and a driving component 13, wherein the filtering component 12 includes an upper filter sheet 121 and a lower filter sheet 122, the upper filter sheet 121 is arranged above the lower filter sheet 122, the sides of the upper filter sheet 121 and the lower filter sheet 122 facing each other are arranged as inclined surfaces, the inclined surfaces of the upper filter sheet 121 and the lower filter sheet 122 have the same inclination angle, the ray beam passes through the upper filter sheet 121 and the lower filter sheet 122 in sequence, and the elastic component 14 Arranged on the support component 11, the lower filter plate 122 is elastically supported on the elastic component 14 in the vertical direction, the upper filter plate 121 and the lower filter plate 122 are arranged at intervals, or the upper filter plate 121 and the lower filter plate 122 are fitted together; the output end of the driving component 13 is transmission-connected with the upper filter plate 121 to drive the upper filter plate 121 to make a linear reciprocating motion in the horizontal direction to adjust the sum of the propagation paths of the upper filter plate 121 and the lower filter plate 122, thereby realizing stepless adjustment of the filter thickness according to different filtering requirements.

[0062] Furthermore, the steplessly adjustable filter device 1 further comprises a beam limiter 15, wherein the beam limiter 15 is arranged between the X-ray emitter 3 and the steplessly adjustable filter device 1, and a second through hole 151 is provided on the beam limiter 15, and the X-ray beam emitted by the X-ray emitter 3 is incident on the steplessly adjustable filter device 1 through the second through hole 151. The X-ray emitter 3 and the steplessly adjustable filter device 1 are both arranged on the top of the scanning window 21, so that the overall human body scanning is more convenient, and the filter thickness can be infinitely adjusted according to different filtering requirements.

[0063] In this embodiment, it is assumed that x The change in ,but ,in fory The amount of change, θ is the angle of the inclined plane, so different θ The value can make the same Get different , thereby changing the filtration thickness. It should be noted that θ It can be selected and adjusted according to actual conditions and is not specifically limited here.

[0064] Furthermore, the drive assembly 13 is arranged on the support assembly 11, which effectively strengthens the overall rigidity of the stepless adjustment filter device 1 and improves the stability of the stepless filtration; the elastic assembly 14 is arranged on the support assembly 11, and the lower filter sheet 122 is elastically supported on the elastic assembly 14 in the vertical direction, and the upper filter sheet 121 and the lower filter sheet 122 are fitted. When the upper filter sheet 121 and the lower filter sheet 122 are fitted, the drive assembly 13 drives the upper filter sheet 121 to move in the horizontal direction, so that under the action of the elastic assembly 14, the upper filter sheet 121 drives the lower filter sheet 122 to move downward, thereby adjusting the filtering thickness of the upper filter sheet 121 and the lower filter sheet 122, so as to prevent the lower filter sheet 122 from causing movement obstruction to the upper filter sheet 121, and the upper filter sheet 121 and the lower filter sheet 122 are fitted, thereby improving the filtering effect and accuracy.

[0065] Further, the support assembly 11 includes a first support seat 111 and a second support seat 112, wherein the first support seat 111 is provided with a first through hole 1111, and the lower filter 122 is arranged on the first support seat 111, so that the ray beam passes through the upper filter 121 and the lower filter 122 and is emitted from the second through hole 151; the second support seat 112 is arranged on the first support seat 111, and the drive assembly 13 is arranged on the second support seat 112. The upper filter 121 is supported by the first support seat 111, and the first through hole 1111 on the first support seat 111 enables the ray beam to pass through the first support seat 111 to avoid blocking the ray beam; the second support seat 112 effectively disperses the pressure of the entire support assembly 11 on the drive assembly 13, thereby improving the overall stability of the stepless adjustment filter device 1.

[0066] Specifically, the first through hole 1111 and the second through hole 151 are provided with transmissive lenses. Since normal or abnormal tissues have different CT values ​​and the resolution ability of the human eye is relatively limited, when it is desired to display the details of a certain tissue or structure, a transmissive lens is required to assist, and a window width suitable for observing the lesions of the tissue or structure should be selected according to different tissues or structures, so as to obtain the best display effect.

[0067] Furthermore, the elastic component 14 includes a support frame 141 and an elastic member 142, wherein the support frame 141 includes a base and a mounting rod connected to each other, the base is arranged on the support component 11, and the mounting rod is passed through the lower filter plate 122; the elastic member 142 is sleeved on the mounting rod, and one end of the elastic member 142 abuts against the bottom of the lower filter plate 122, and the other end abuts against the base. A support frame 141 is arranged between the elastic member 142 and the support component 11, and the support frame 141 includes a base and a mounting rod. The base improves the support stability of the elastic member 142, and the mounting rod provides a guiding role for the expansion and contraction and recovery of the elastic member 142. The arrangement of the support frame 141 effectively improves the working efficiency of the elastic member 142 and increases the stability of the elastic member 142.

[0068] In this embodiment, if Figure 2 and Figure 3 As shown, four elastic components 14 are provided, respectively disposed at four vertex positions of the bottom surface of the lower filter plate 122 , which improves the stability while also improving the aesthetics of the stepless adjustment filter device 1 .

[0069] Specifically, the elastic member 142 can be a leaf spring, a coil spring, and a rubber spring, wherein the leaf spring has a guiding function and can play a certain vibration reduction role due to the friction between the spring leaves; the coil spring does not require lubrication compared to the leaf spring, and the required longitudinal space is not large, and it also has the advantages of small mass; the rubber spring is made of rubber, and generally, in order to increase the spring travel, it is often made into a hollow shape, so the rubber spring has the advantages of sound insulation, no noise during operation, no need for lubrication, and variable stiffness. Therefore, the corresponding spring can be selected as the elastic member 142 of this embodiment according to the actual situation, and no specific limitation is made here.

[0070] Furthermore, the driving assembly 13 includes a driving motor 131, a screw rod 132 and a guide rod 133, wherein the driving motor 131 is arranged on the above-mentioned supporting assembly 11; the screw rod 132 is connected to the output end of the driving motor 131, the screw rod 132 is threadedly connected to the upper filter plate 121, and the driving motor 131 drives the screw rod 132 to rotate; the guide rod 133 is connected to the supporting assembly 11, and the upper filter plate 121 is slidably arranged on the guide rod 133.

[0071] Furthermore, the material of the upper filter 121 and the lower filter 122 is copper, aluminum or copper-aluminum composite material, which can absorb the low-energy components in the X-ray beam in advance, thereby increasing the filtering effect of the filter on the soft ray components in the ray beam.

[0072] Furthermore, the drive assembly 13 and the upper filter 121 adopt a threaded guide structure, which has the advantages of simple structure, reliable connection, and convenient assembly and disassembly. At the same time, the setting of the guide rod 133 can prevent the upper filter 121 from rotating, ensuring that the upper filter 121 only moves in the horizontal direction.

[0073] Furthermore, flange structures 1221 are provided on both sides of the inclined surface of the lower filter plate 122 perpendicular to the horizontal direction, and the upper filter plate 121 is slidably provided between the two flange structures 1221. By providing the flange structures 1221 on both sides in the horizontal direction, the movement of the upper filter plate 121 is guided, thereby improving the stability of the upper filter plate 121 in linear motion in the horizontal direction.

[0074] Furthermore, if Figure 3 As shown, a stopper 1222 is provided at one end of the lower filter plate 122. When the upper filter plate 121 is in the left limit position, its narrower end will abut against the stopper 1222, thereby preventing the upper filter plate 121 from continuing to move, preventing damage to the spring, motor and threaded rod due to excessive movement of the upper filter plate 121, and improving the stability and safety of the stepless adjustment filter device 1.

[0075] Embodiment 2:

[0076] Figure 4 1 shows a second embodiment, wherein the components identical or corresponding to those in the first embodiment are marked with the same reference numerals as those in the first embodiment. For the sake of simplicity, only the differences between the second embodiment and the first embodiment are described. Figure 5 As shown, the lower filter 122 is fixedly arranged on the support assembly 11, and the lower filter 122 is spaced apart from the upper filter 121, wherein the gap between the lower filter 122 and the upper filter 121 is filled with lipid medium, and the lipid medium does not filter the X-ray beam, and its main function is to prevent the X-ray beam from being reflected out of the stepless adjustment filter device 1 through the inclined surface of the lower filter 122. The upper filter 121 is spaced apart from the lower filter 122, which simplifies the setting method of the stepless adjustment filter device 1 and reduces the manufacturing cost of the stepless adjustment filter device 1. At the same time, the upper filter 121 is spaced apart from the lower filter 122, which avoids the problem that the lower filter 122 hinders the movement of the upper filter 121 when the upper filter 121 has a large range of movement. It should be noted that before each adjustment of the position of the upper filter 121, the lipid medium in the gap must be cleaned, wherein the lipid medium cleaning method is a conventional means in the prior art and is not specifically limited here. After adjusting the position of the filter, the lipid medium is used to completely fill the gap between the lower filter 122 and the upper filter 121.

[0077] Specifically, Figure 6As shown, when the upper filter plate 121 is at the left extreme position, there is no gap between the lower filter plate 122 and the upper filter plate 121. At this time, the gap between the lower filter plate 122 and the upper filter plate 121 does not need to be filled with lipid medium.

[0078] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Stepless adjustment filtering device, characterized in that: include: Support assembly (11); A filter assembly (12), comprising an upper filter (121) and a lower filter (122), wherein the lower filter (122) is arranged on the support assembly (11), the upper filter (121) is arranged above the lower filter (122), the sides of the upper filter (121) and the lower filter (122) facing each other are arranged as inclined surfaces, the inclined angles of the inclined surfaces of the upper filter (121) and the lower filter (122) are consistent, and the ray beam passes through the upper filter (121) and the lower filter (122) in sequence; and A driving component (13), the driving component (13) being arranged on the supporting component (11), and having an output end thereof being drivingly connected to the upper filter (121) so as to drive the upper filter (121) to perform linear reciprocating motion in a horizontal direction so as to adjust the sum of propagation paths of the radiation beam on the upper filter (121) and the lower filter (122); The material of the upper filter plate (121) and the lower filter plate (122) is copper, aluminum or a copper-aluminum composite material; The lower filter (122) is fixedly arranged on the support component (11); the lower filter (122) and the upper filter (121) are arranged at a distance; the gap between the lower filter (122) and the upper filter (121) is filled with a lipid medium; the lipid medium does not filter the X-ray beam; the lipid medium can prevent the X-ray beam from being reflected out of the steplessly adjustable filter device (1) through the inclined surface of the lower filter (122).

2. The stepless adjustment filtering device according to claim 1, characterized in that: The support assembly (11) comprises: a first support seat (111), wherein the first support seat (111) is provided with a first through hole (1111), the lower filter (122) is provided on the first support seat (111), the radiation beam passes through the upper filter (121) and the lower filter (122) and is emitted from the first through hole (1111); and The second support seat (112) is arranged on the first support seat (111), and the driving component (13) is arranged on the second support seat (112).

3. The stepless adjustment filtering device according to claim 1, characterized in that: The driving assembly (13) comprises: A driving motor (131) is arranged on the supporting assembly (11); A screw rod (132) is connected to the output end of the driving motor (131), the driving motor (131) drives the screw rod (132) to rotate, and the screw rod (132) is threadedly connected to the upper filter plate (121); and A guide rod (133), wherein the guide rod (133) is connected to the support assembly (11), and the upper filter plate (121) is slidably arranged on the guide rod (133).

4. The stepless adjustment filtering device according to claim 1, characterized in that: The stepless adjustment filtering device also includes: A beam limiter (15), the beam limiter (15) being arranged on the support assembly (11) and located above the upper filter (121), the beam limiter (15) being provided with a second through hole (151), and the ray beam being incident on the filter assembly (12) through the second through hole (151).

5. An X-ray device, comprising a frame (2), an X-ray emitter (3) and a steplessly adjustable filter device as described in any one of claims 1 to 4, wherein a scanning window (21) is arranged on the frame (2), the X-ray emitter (3) and the steplessly adjustable filter device are both arranged on the top of the scanning window (21), and the X-ray emitter (3) is located above the steplessly adjustable filter device.

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