X-ray tube anode and x-ray tube

Abstract

An X-ray tube anode (10) and an X-ray tube (100). The X-ray tube anode (10) comprises: an anode cap (18); an anode body (12); a first shielding portion (16) provided at a position in a first part (13) of the anode body (12) that is close to an anode target (14), the first shielding portion (16) being embedded in the anode body (12) to shield against X-rays, the first shielding portion (16) having a surface (28) facing a first inner ring face (20), the surface (28) fitting the first inner ring face (20) and being flush with a first outer ring face (22), and the projection of the first shielding portion (16) and the projection of the anode target (14) on a plane perpendicular to the axis of the anode body (12) overlapping; and a second shielding portion (30), which is located outside a cavity (21) and is at least partially embedded in a second part (15) of the anode body (12), wherein on the plane perpendicular to the axis of the anode body (12), the projection of a gap between the first outer ring face (22) and the first inner ring face (20) falls into the projection of the second shielding portion (30). In this way, the present invention is conducive to reducing the leakage of X-rays from the X-ray tube anode (10), thus helping to reduce the use of shielding materials in a high-voltage X-ray source using the X-ray tube (100) and reduce the weight of the X-ray source, etc.

Description

X-ray tube anode and X-ray tube Technical Field

[0001] The present invention relates to the technical field of electric vacuum devices, and in particular to an X-ray tube anode and an X-ray tube. Background Art

[0002] An X-ray tube is a high-voltage, high-vacuum electronic device that typically consists of a cathode assembly, which serves as an electron emission source; an anode assembly, which generates X-rays and dissipates heat; and a tube housing, which provides vacuum sealing and insulation. Accelerated by an electric field ranging from tens to hundreds of kilovolts, electrons emitted by the electron emission source bombard the anode target in the anode assembly, generating X-rays.

[0003] However, in existing X-ray tubes, for high-kilovolt X-ray tubes, an anode cap made of oxygen-free copper is usually provided to shield secondary electrons that bounce off the anode target. The secondary electrons will generate scattered X-rays that penetrate the anode body, causing the scattered X-rays to leak from the anode of the X-ray tube, thereby increasing the use of shielding materials in the high-voltage X-ray source and the weight of the X-ray source.

[0004] Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an X-ray tube anode and an X-ray tube.

[0006] To achieve the above objectives, one aspect of an embodiment of the present invention relates to an X-ray tube anode, comprising: an anode cap having a first inner surface and a cavity surrounded by the first inner surface; an anode body comprising a first portion extending into the cavity and a second portion partially located outside the cavity and coaxial with the first portion, an anode target being provided at one end of the first portion, the first portion having a first outer surface mating with the first inner surface, and the second portion having a radially larger dimension than the first portion; and a first shielding portion disposed in the first portion of the anode body near the anode target, the first shielding portion being embedded in the anode body to shield X-rays, the first shielding portion having a surface facing the first inner surface, the surface mating with the first inner surface and flush with the first outer surface, and the projections of the first shielding portion and the anode target overlapping on a plane perpendicular to the axis of the anode body; and a second shielding portion located outside the cavity and at least partially embedded in the second portion of the anode body, wherein the projection of the gap between the first outer surface and the first inner surface on a plane perpendicular to the axis of the anode body falls within the projection of the second shielding portion.

[0007] In some embodiments, a minimum distance between the first shielding portion and the anode target in the axial direction of the anode body is 0.5 mm to 5 mm.

[0008] In some embodiments, the gap between the first inner ring surface and the first outer ring surface is 0.05 mm to 0.2 mm.

[0009] In some embodiments, a first groove is provided on the first portion of the anode body, the first shielding portion is nested in the first groove, and the first shielding portion includes a second inner ring surface having a shape corresponding to that of the first groove.

[0010] In some embodiments, a second groove is provided on the second portion of the anode body, the second shielding portion is nested in the second groove, and the second shielding portion is located at an end portion of the anode cap.

[0011] In some embodiments, the X-ray tube anode further includes at least one third shield portion spaced apart between the first shield portion and the second shield portion.

[0012] In some embodiments, there are multiple third shielding parts, and the multiple third shielding parts are spaced apart from each other.

[0013] In some embodiments, a third groove is provided on the anode body, the third shielding portion is nested in the third groove, and the third shielding portion includes a third outer ring surface, which is flush with the first outer ring surface and cooperates with the first inner ring surface.

[0014] In some embodiments, a distance between two adjacent ones of the first shielding portion, the second shielding portion, and the third shielding portion is proportional to a depth to which the two adjacent ones of the first shielding portion, the second shielding portion, and the third shielding portion are embedded in the anode body.

[0015] In some embodiments, the depths to which the first shield portion, the second shield portion, and the third shield portion are embedded in the anode body alternate with each other.

[0016] In some embodiments, the first shielding portion includes a first half and a second half that are joined to each other and a first seam located between the first half and the second half, and the second shielding portion includes a third half and a fourth half that are joined to each other and a second seam located between the third half and the fourth half. After assembly, the first seam and the second seam are staggered with each other in the circumferential direction of the first shielding portion and the second shielding portion.

[0017] In some embodiments, the third shield portion includes a fifth half and a sixth half joined to each other and a third seam between the fifth and sixth halves, wherein the third seam and the second seam are offset from each other in a circumferential direction of the second and third shield portions.

[0018] In some embodiments, the anode cap comprises X-ray shielding material.

[0019] In some embodiments, the length of the anode body is not less than 10 mm.

[0020] Another aspect of the embodiments of the present invention relates to an X-ray tube, which includes the X-ray tube anode described in this application.

[0021] The technical solution of the embodiment of the present application can be beneficial to reducing the leakage of X-rays from the anode of the X-ray tube, and can help reduce the use of shielding materials in the high-voltage X-ray source using the X-ray tube, reduce the weight of the X-ray source, etc.

[0022] If technical conditions permit, the technical solutions of the embodiments of this application can be combined arbitrarily.

[0023] The present application will be further described below with reference to the accompanying drawings. The drawings may use the same or similar reference numerals to refer to the same or similar elements, devices, shapes, and structures in different embodiments. The descriptions of the same or similar elements, devices, shapes, structures, features, and effects in different embodiments, as well as the descriptions of the same or similar elements, devices, shapes, structures, features, and effects as those in the prior art, may be omitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic cross-sectional view of an X-ray tube anode according to an embodiment of the present invention; and

[0025] FIG. 2 is a partial cross-sectional schematic diagram of an X-ray tube including the anode of the X-ray tube in FIG. 1 . DETAILED DESCRIPTION

[0026] FIG1 is a schematic cross-sectional view of an X-ray tube anode according to an embodiment of the present invention. As shown in FIG1 , one aspect of the embodiment of the present invention relates to an X-ray tube anode 10, comprising: an anode cap 18 having a first inner ring surface 20 and a cavity 21 surrounded by the first inner ring surface 20; an anode body 12, comprising a first portion 13 extending into the cavity 21 and a second portion 15 partially located outside the cavity 21 and coaxial with the first portion 13, an anode target 14 being provided at one end of the first portion 13, the first portion 13 having a first outer ring surface 22 that cooperates with the first inner ring surface 20, and the second portion 15 having a radial dimension greater than the radial dimension of the first portion 13; and further comprising: a first shielding portion 16 disposed in the first portion 13 of the anode body 12, close to the first portion 13. Near the anode target 14, a first shielding portion 16 is embedded in the anode body 12 to shield X-rays, the first shielding portion 16 having a surface 28 facing the first inner ring surface 20, the surface 28 cooperates with the first inner ring surface 20 and is flush with the first outer ring surface 22, and the projections of the first shielding portion 16 and the anode target 14 on a plane perpendicular to the axis X of the anode body 12 overlap; and a second shielding portion 30, which is located outside the cavity 21 and is at least partially embedded in the second portion 15 of the anode body 12, and on a plane perpendicular to the axis X of the anode body 12, the projection of the gap between the first outer ring surface 22 and the first inner ring surface 20 falls within the projection of the second shielding portion 30.

[0027] This can help reduce the leakage of X-rays from the X-ray tube anode 10, and can help reduce the use of shielding materials in a high-voltage X-ray source using the X-ray tube anode 10 and reduce the weight of the X-ray source.

[0028] The X-ray tube anode 10 may be any anode device for generating X-rays and dissipating heat, and may have any possible configuration as long as it is suitable for the present invention.

[0029] The anode cap 18 may have any possible configuration as long as it is suitable for use with the present invention.

[0030] The first inner ring surface 20 may define a cavity 21. The cavity 21 may be a substantially cylindrical cavity.

[0031] The anode body 12 and the first portion 13 thereof can be used to support an anode target 14. The anode target 14 can be any target material as long as it is suitable for use in the present invention. The anode body 12 and the first portion 13 can be substantially cylindrical.

[0032] When the first portion 13 extends into the cavity 21 of the anode cap 18 , the anode cap 18 can be sleeved on the side of the first portion 13 of the anode body 12 close to the anode target 14 to shield secondary electrons rebounding from the anode target 14 .

[0033] The first shielding portion 16 may be a substantially annular body, or may have any other possible configuration as long as it is suitable for the present invention.

[0034] The first inner ring surface 20 and the first outer ring surface 22 mate with each other. The first shield portion 16 is embedded in the anode body 12. Furthermore, the first shield portion 16 has a surface 28 facing the first inner ring surface 20. This surface 28 of the first shield portion 16 mates with the first inner ring surface 20 and is flush with the first outer ring surface 22, facilitating easy installation and positioning of the X-ray tube anode 10 and ensuring a tight fit, thereby reducing X-ray leakage. This contributes to a simple structure and easy assembly of the X-ray tube anode 10, facilitating welding of the anode cap 18 to the anode body 12, and reducing X-ray leakage from the gap between the anode cap 18 and the first portion 13 of the anode body 12.

[0035] The first outer ring surface 22 and the surface 28 may each have any possible configuration as long as they are suitable for use with the present invention.

[0036] The first shielding portion 16 can attenuate X-rays so that they cannot penetrate the X-ray tube anode 10, thereby shielding the X-rays. For example, the first shielding portion 16 can include a material with high X-ray attenuation, such as tungsten copper, tungsten iron, or tungsten iron nickel.

[0037] The first shielding portion 16 can prevent X-rays from leaking toward the first portion 13 of the anode body 12 in a direction away from the anode target 14, thereby reducing the leakage and overflow of X-rays from the X-ray tube anode 10, and further reducing the use of toxic and harmful shielding materials such as lead and lead oxide in the high-voltage X-ray source using the X-ray tube, and reducing the weight of the X-ray source.

[0038] Here, "a high-voltage X-ray source using an X-ray tube" generally refers to an X-ray generator that encapsulates an X-ray tube and generates X-rays, which can be divided into a tube-in-sheath and an integrated X-ray source depending on the design.

[0039] The tube sleeve includes a tube shell, high-voltage connectors at both ends of the tube shell, insulating oil sealed in the tube shell for high-voltage insulation and heat dissipation, an X-ray tube immersed in the insulating oil, and a shielding layer located between the X-ray tube and the tube shell that has a high attenuation effect on X-rays. The high-voltage generator is connected to the high-voltage connectors at both ends of the tube shell through a high-voltage cable to drive the X-ray tube to generate X-rays.

[0040] In addition to the tube shell, the insulating oil sealed in the tube shell for high voltage insulation and heat dissipation, the X-ray tube immersed in the insulating oil, and the shielding layer with high attenuation effect on X-rays located between the X-ray tube and the tube shell, the integrated X-ray source also contains the high voltage generator circuit in the tube shell, which is the so-called integrated X-ray source.

[0041] The shielding layer of the tube housing and integrated X-ray source is typically made of a polymer material containing lead or lead oxide, and is used to shield X-rays that escape from the X-ray tube. When X-ray leakage from the X-ray tube anode 10 is reduced, the amount of X-rays escaping from the X-ray tube containing it is reduced. Reducing the thickness of the X-ray source's shielding layer, for example, can also effectively shield X-rays that escape from the X-ray tube. Furthermore, reducing the thickness of the X-ray source's shielding layer can reduce the weight of the X-ray source.

[0042] The projections of the first shielding portion 16 and the anode target 14 on a plane perpendicular to the axis X of the anode body 12 overlap, which can help prevent scattered X-rays from leaking from the non-overlapping area between the first shielding portion 16 and the anode target 14 on a plane perpendicular to the axis X of the anode body 12.

[0043] In the present application, the first shielding portion 16 disposed in the first portion 13 of the anode body 12 near the anode target 14 can, together with the anode cap 18 and the anode target 14, enclose and scatter X-rays, thereby preventing X-rays scattered in various directions from leaking from the X-ray tube anode 10 after multiple scattering, thereby shielding the scattered X-rays, reducing the use of shielding materials in a high-voltage X-ray source using the X-ray tube anode 10, and reducing the weight of the X-ray source.

[0044] In the embodiments of the present invention, unless otherwise specified, “first”, “second” and similar terms are not intended to indicate priority, importance, etc., but are mainly used to distinguish the indicators, elements, devices, shapes, structures, etc. that they modify.

[0045] The anode body 12 further includes a second portion 15 coaxial with the first portion 13. The second portion 15 is partially located outside the cavity 21, and the radial dimension of the second portion 15 is larger than the radial dimension of the first portion 13. The X-ray tube anode 10 further includes: a second shielding portion 30, which is located outside the cavity 21 and is at least partially embedded in the second portion 15 of the anode body 12. In a plane perpendicular to the axis X of the anode body 12, the projection of the gap between the first outer ring surface 22 and the first inner ring surface 20 falls within the projection of the second shielding portion 30.

[0046] In this way, the second shielding portion 30 can be used to prevent scattered X-rays from leaking from the X-ray tube anode 10 along the gap between the first outer ring surface 22 and the first inner ring surface 20 .

[0047] The second portion 15 can support the anode cap 18 and can be used to mount the second shield 30. The second portion 15 can be substantially cylindrical.

[0048] Here, the “radial direction” refers to a linear direction perpendicular to the extending direction of the axis X of the anode body.

[0049] The radial dimension of the second portion 15 is larger than the radial dimension of the first portion 13 , which is beneficial for a reasonable structural design and convenient assembly of the X-ray tube anode 10 .

[0050] The second shielding portion 30 is located outside the cavity 21 and is at least partially embedded in the second portion 15 of the anode body 12. In a plane perpendicular to the axis X of the anode body 12, the projection of the gap between the first outer ring surface 22 and the first inner ring surface 20 falls within the projection of the second shielding portion 30. This can help the second shielding portion 30 attenuate scattered X-rays that leak from the cavity 21 along the gap between the first outer ring surface 22 and the first inner ring surface 20 in a direction away from the anode target 14, thereby preventing the scattered X-rays from leaking out of the X-ray tube anode 10 along the gap between the first outer ring surface 22 and the first inner ring surface 20.

[0051] The second shielding portion 30 may be spaced apart from the first shielding portion 16 along the axis X of the anode body 12, and the first shielding portion 16 is located between the second shielding portion 30 and the anode target 14. That is, the second shielding portion 30 is located on a side of the first shielding portion 16 away from the anode target 14. This can further prevent X-rays from leaking toward the anode body 12 away from the anode target 14.

[0052] The second shield portion 30 may have the same or different configuration as the first shield portion 16 and may have the same or different X-ray attenuating material as the first shield portion 16 , as long as it is suitable for use in the present invention.

[0053] In some embodiments, the minimum distance between the first shielding portion 16 and the anode target 14 in the axis X direction of the anode body 12 is 0.5 mm to 5 mm.

[0054] In this way, the first shielding portion 16 can shield as many X-rays as possible near the anode target 14 , and can help prevent X-rays from leaking toward the anode body 12 away from the anode target 14 .

[0055] The gap between the first inner ring surface 20 of the anode cap 18 and the first outer ring surface 22 of the anode body 12 may be 0.05 mm to 0.2 mm to facilitate assembly and welding of the anode cap 18 and the anode body 12 and prevent X-ray leakage due to an excessive gap.

[0056] In some embodiments, a first groove 24 is provided on the first portion 13 of the anode body 12 . The first shielding portion 16 is nested in the first groove 24 . The first shielding portion 16 includes a second inner ring surface 26 having a shape corresponding to that of the first groove 24 .

[0057] In this way, the installation gap between the first shielding part 16 and the anode cap 18 and the first portion 13 of the anode body 12 can be small, which can help reduce X-ray leakage.

[0058] The first groove 24 may be a substantially annular groove, and its cross-sectional shape may be substantially rectangular.

[0059] The second inner ring surface 26 may have any possible shape or configuration as long as it is suitable for use with the present invention.

[0060] In some embodiments, a second groove 32 is provided on the second portion 15 of the anode body 12 . The second shielding portion 30 is nested in the second groove 32 . The second shielding portion 30 is located at an end of the anode cap 18 .

[0061] This can facilitate easy assembly between the second shielding portion 30 and the second portion 15 of the anode body 12 , and can help prevent X-rays from leaking through the gap between the first inner ring surface 20 and the first outer ring surface 22 through the second shielding portion 30 .

[0062] The second groove 32 may be a substantially annular groove, and its cross-sectional shape may be substantially rectangular.

[0063] The anode cap 18 and the second shielding portion 30 may be welded to each other, so that the second shielding portion 30 is firmly installed and the structure of the X-ray tube anode 10 is stable.

[0064] The second shielding portion 30 may be a substantially annular body, and the outer sharp edges of the second shielding portion 30 may be rounded to prevent high voltage discharge and sparking when the X-ray tube anode 10 is working.

[0065] In some embodiments, the X-ray tube anode 10 further includes at least one third shielding portion 34 spaced apart between the first shielding portion 16 and the second shielding portion 30 .

[0066] This can further help prevent X-rays from leaking toward the first portion 13 of the anode body 12 in a direction away from the anode target 14 .

[0067] The third shield portion 34 may have the same or different configuration as the first shield portion 16 and the second shield portion 30 and may have the same or different X-ray attenuating material as the first shield portion 16 and the second shield portion 30 , as long as it is suitable for the present invention.

[0068] In some embodiments, there are multiple third shielding parts 34 , and the multiple third shielding parts 34 are spaced apart from each other.

[0069] This can help prevent the leakage of X-rays scattered in multiple directions.

[0070] In some embodiments, a third groove 36 is provided on the anode body 12, and the third shielding portion 34 is nested in the third groove 36. The third shielding portion 34 includes a third outer ring surface 38. The third outer ring surface 38 is flush with the first outer ring surface 22 of the anode body 12 and cooperates with the first inner ring surface 20 of the anode cap 18.

[0071] In this way, the installation gap between the third shielding part 34 and the anode cap 18 and the anode body 12 can be small, which can help reduce X-ray leakage.

[0072] The third shielding portion 34 may be a substantially annular body.

[0073] The third groove 36 may be provided in the first portion 13 of the anode body 12 , and may be a substantially annular groove with a substantially rectangular cross-sectional shape.

[0074] The third outer circumferential surface 38 may have any possible shape or configuration as long as it is suitable for use with the present invention.

[0075] In some embodiments, the distance D between two adjacent ones of the first shield portion 16 , the second shield portion 30 , and the third shield portion 34 is proportional to the depth S of the two shield portions embedded in the anode body 12 .

[0076] This can help the X-ray tube anode 10 to have a reasonable structure and low manufacturing cost.

[0077] The specific values ​​of the distance D between adjacent two of the first shielding portion 16, the second shielding portion 30 and the third shielding portion 34 and the depth S of their embedment into the anode body 12 can be determined according to the specific dimensions of the first portion 13, the second portion 15, the anode cap 18 and other components of the anode body 12 of the X-ray tube anode 10.

[0078] In some embodiments, the depths S to which the first shield portion 16 , the second shield portion 30 , and the third shield portion 34 are embedded in the anode body 12 alternate with each other.

[0079] This can help effectively prevent X-rays from leaking out after being scattered multiple times.

[0080] In some embodiments, the first shielding portion 16 includes a first half (not shown) and a second half (not shown) that are joined to each other and a first seam (not shown) located between the first half and the second half, and the second shielding portion 30 includes a third half (not shown) and a fourth half (not shown) that are joined to each other and a second seam (not shown) located between the third half and the fourth half. After assembly, the first seam and the second seam are staggered with each other in the circumferential direction of the first shielding portion 16 and the second shielding portion 30.

[0081] This can help prevent X-rays from leaking through the first seam and the second seam.

[0082] The first shield portion 16 and the second shield portion 30 may each be a ring-shaped body.

[0083] The first half and the second half may be two semicircular rings that together form the first shielding portion 16 .

[0084] The third half and the fourth half may be two semicircular rings that together form the second shielding portion 30 .

[0085] In some embodiments, the third shield portion 34 includes a fifth half and a sixth half joined to each other and a third seam between the fifth and sixth halves. The third seam and the second seam are staggered in the circumferential direction of the second shield portion 30 and the third shield portion 34 .

[0086] This can help prevent X-rays from leaking through the second seam and the third seam.

[0087] The third shielding portion 34 may be an annular body, and the fifth half and the sixth half may be two semicircular rings that together enclose the third shielding portion 34 .

[0088] The first seam, the second seam, and the third seam may be 0.2 mm to 1 mm.

[0089] The axes of the first shield 16 , the second shield 30 , and the third shield 34 may be coaxial with the axis X of the anode body 12 to facilitate assembly.

[0090] In some embodiments, the anode cap 18 comprises X-ray shielding material.

[0091] This can help prevent X-rays from penetrating the anode cap 18 and leaking.

[0092] The anode cap 18 may include, for example, tungsten copper, tungsten iron, tungsten iron nickel, or other X-ray shielding materials having a high attenuation effect on X-rays.

[0093] The X-ray shielding material may be located on the first inner surface 20 of the anode cap 18 , and / or on an outer surface of the anode cap 18 , and / or dispersed within the anode cap 18 .

[0094] In some embodiments, the length L of the anode body 12 is not less than 10 mm.

[0095] This can help prevent X-rays from penetrating the anode body 12 and leaking.

[0096] For example, if the anode body 12 is made of copper, its X-ray attenuation coefficient is typically 10% of that of lead. If a very small number of X-rays, after being shielded by the anode cap 18, first shield 16, second shield 30, and third shield 34, still scatter away from the anode target 14 along the axis X of the anode body 12, then the attenuation experienced by the scattered X-rays passing through an anode body 12 of at least 10 mm is equivalent to the attenuation experienced by lead passing through several millimeters thick. Therefore, an anode body 12 with a length L of at least 10 mm can effectively shield such scattered X-rays. Figure 2 is a partial cross-sectional schematic diagram of an X-ray tube including the X-ray tube anode of Figure 1. As shown in Figure 2, another aspect of an embodiment of the present invention relates to an X-ray tube 100 including the X-ray tube anode 10 described herein.

[0097] As described above, this can help reduce the leakage of X-rays in the X-ray tube 100 from the X-ray tube anode 10, and can help reduce the use of shielding materials in the high-voltage X-ray source using the X-ray tube anode 10 and reduce the weight of the X-ray source.

[0098] In this embodiment, a first shielding portion 16, located in the first portion 13 of the anode body 12 near the anode target 14, is enclosed by the anode cap 18 and the anode target 14 to prevent X-rays scattered in various directions from leaking out of the X-ray tube anode 10 after multiple scattering. For high-kilovolt X-ray tubes 100, high-density and / or high-thickness shielding components are typically required to achieve ideal shielding effectiveness and effectively prevent scattered X-rays from penetrating the anode body 12. In the prior art, to prevent X-rays from penetrating the anode body, a common method is to install or wrap shielding components around the bottom or periphery of the anode body. For example, shielding material, such as a shielding coating, is simply applied to the end of the anode body, such as near the anode target. However, such a shielding coating is easily penetrated by scattered X-rays and therefore fails to effectively shield scattered X-rays. Alternatively, to achieve high shielding effectiveness, the thickness of the shielding components applied to the bottom or periphery of the anode body is increased, thereby increasing the cost of the entire X-ray tube system. By adopting the solution of this embodiment, while achieving high shielding effectiveness, it is possible to effectively avoid the problem of increasing the cost of the entire X-ray tube-based system by installing or wrapping thicker shielding components, such as at the bottom or periphery of the anode body, in order to achieve ideal shielding effectiveness.

[0099] Furthermore, in this embodiment, the first shielding portion 16, the second shielding portion 30, and the third shielding portion 34 are spaced apart from each other in the X-axis direction of the anode body 12. This not only attenuates X-rays along the longer length of the anode body 12, but also avoids increasing the thickness of the shielding components to improve shielding effectiveness, which would otherwise increase the cost of the entire X-ray tube-based system and / or deteriorate the heat dissipation performance of the X-ray tube anode 10 or even the X-ray tube 100.

[0100] In addition, as mentioned above, the solution of this embodiment can reduce the use of toxic and harmful shielding materials such as lead and lead oxide in the high-voltage X-ray source using an X-ray tube, reduce the weight of the X-ray source, etc., thereby further improving the safety of the high-voltage X-ray source using an X-ray tube, and reducing the manufacturing cost of the high-voltage X-ray source using an X-ray tube.

[0101] The various specific embodiments described above and shown in the drawings are only for illustrating the present invention and are not exhaustive. Within the scope of the basic technical concept of the present invention, any form of modification made by a person skilled in the relevant art to the present invention is within the scope of protection of the present invention.

Claims

1. An X-ray tube anode, comprising: An anode cap having a first inner ring surface and a cavity surrounded by the first inner ring surface; an anode body, comprising a first portion extending into the cavity and a second portion partially located outside the cavity and coaxial with the first portion, wherein an anode target is disposed at one end of the first portion, the first portion has a first outer ring surface matching the first inner ring surface, and the second portion has a radial dimension greater than that of the first portion; It is characterized by further comprising: a first shielding portion, which is disposed in the first portion of the anode body at a position close to the anode target, the first shielding portion being embedded in the anode body to shield X-rays, the first shielding portion having a surface facing the first inner ring surface, the surface matching the first inner ring surface and being flush with the first outer ring surface, and the projections of the first shielding portion and the anode target on a plane perpendicular to the axis of the anode body overlapping; and A second shielding portion is located outside the cavity and at least partially embedded in the second portion of the anode body, and on a plane perpendicular to the axis of the anode body, a projection of the gap between the first outer ring surface and the first inner ring surface falls within a projection of the second shielding portion.

2. The X-ray tube anode according to claim 1, characterized in that: A minimum distance between the first shielding portion and the anode target in the axial direction of the anode body is 0.5 mm to 5 mm.

3. The X-ray tube anode according to claim 1, characterized in that: The gap between the first inner ring surface and the first outer ring surface is 0.05 mm to 0.2 mm.

4. The X-ray tube anode according to claim 1, wherein: A first groove is provided on the first portion of the anode body, the first shielding part is nested in the first groove, and the first shielding part includes a second inner ring surface corresponding to the shape of the first groove.

5. The X-ray tube anode according to claim 1, characterized in that: A second groove is provided on the second portion of the anode body, the second shielding part is nested in the second groove, and the second shielding part is located at the end of the anode cap.

6. The X-ray tube anode according to claim 1, characterized in that: Also included is at least one third shielding portion spaced apart between the first shielding portion and the second shielding portion.

7. The X-ray tube anode according to claim 6, characterized in that: There are a plurality of the third shielding parts, and the plurality of the third shielding parts are distributed at intervals from each other.

8. The X-ray tube anode according to claim 7, characterized in that: The anode body is provided with a third groove, the third shielding part is nested in the third groove, and the third shielding part includes a third outer ring surface, which is flush with the first outer ring surface and matched with the first inner ring surface.

9. The X-ray tube anode according to claim 8, characterized in that: The distance between two adjacent ones of the first shielding part, the second shielding part and the third shielding part is proportional to the depths at which the two shielding parts are embedded in the anode body.

10. The X-ray tube anode according to claim 9, characterized in that: The depths at which the first shielding part, the second shielding part, and the third shielding part are embedded in the anode body are alternating in size.

11. The X-ray tube anode according to claim 8, characterized in that: The first shielding part includes a first half and a second half that are joined to each other and a first seam between the first half and the second half, and the second shielding part includes a third half and a fourth half that are joined to each other and a second seam between the third half and the fourth half. After assembly, the first seam and the second seam are staggered with each other in the circumferential direction of the first shielding part and the second shielding part.

12. The X-ray tube anode according to claim 11, characterized in that: The third shield portion includes a fifth half and a sixth half joined to each other and a third seam between the fifth half and the sixth half, and the third seam and the second seam are offset from each other in a circumferential direction of the second and third shield portions.

13. The X-ray tube anode according to claim 1, characterized in that: The anode cap comprises an X-ray shielding material.

14. The X-ray tube anode according to claim 1, characterized in that: The length of the anode body is not less than 10 mm.

15. An X-ray tube, characterized in that: The X-ray tube anode comprises the anode of any one of claims 1 to 14.

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