CN115206755A - X-ray tube with self-shielding function and manufacturing method thereof - Google Patents
X-ray tube with self-shielding function and manufacturing method thereof Download PDFInfo
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- CN115206755A CN115206755A CN202110402812.9A CN202110402812A CN115206755A CN 115206755 A CN115206755 A CN 115206755A CN 202110402812 A CN202110402812 A CN 202110402812A CN 115206755 A CN115206755 A CN 115206755A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/112—Non-rotating anodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/12—Cooling non-rotary anodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/16—Vessels; Containers; Shields associated therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/24—Tubes wherein the point of impact of the cathode ray on the anode or anticathode is movable relative to the surface thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/18—Assembling together the component parts of electrode systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/08—Targets (anodes) and X-ray converters
- H01J2235/081—Target material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/12—Cooling
- H01J2235/1204—Cooling of the anode
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/16—Vessels
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Abstract
The invention discloses a self-shielding X-ray tube and a manufacturing method thereof. In order to optimize the shielding mode, the anode cap comprises a half-coating structure and a full-coating structure. Optionally, a cathode shielding plate made of a material similar to that of the anode cap is added at the position of the X-ray path in the cathode region for shielding the X-rays on the cathode path. The radiator comprises two structures of a common radiator and a tungsten ring with a shielding nested layer, and the shielding layer area and the thickness of the anode side of the ray tube are increased. The X-ray tube with the self-shielding structure can effectively reduce the thickness of a shielding layer of a ray source body, reduce the weight of the ray source and reduce the difficulty of development of the ray source with the same level to a portable direction.
Description
Technical Field
The invention relates to the technical field of X-ray tube manufacturing, in particular to an X-ray tube with a self-shielding function and a manufacturing method thereof.
Background
In the X-ray tube manufacturing industry, an X-ray tube is mainly composed of an anode assembly, a cathode assembly, a sealed housing and a heat sink. In the working process, positive high voltage is applied to the anode, the cathode emitter emits electrons, and the electron beams accelerate and bombard the target surface of the anode under the action of a high-voltage electric field to generate X rays. When directional X-rays are generated, a large amount of scattered rays in different directions and secondary electron flow also occur in the working process of the ray tube, so that the shielding work of the ray source manufacture is increased, and the definition of X-ray imaging is reduced. An anode cap is typically fitted to the X-ray tube anode assembly to block some of the scattered radiation and secondary electrons, and an exit window is added to filter the X-rays.
In the traditional X-ray tube manufacturing process, an anode cap is generally made of oxygen-free copper materials, and because the oxygen-free copper has a limited shielding effect on scattered rays and secondary electrons, the fact that a large number of lead plates are adopted to shield parts outside a ray tube window is still difficult to avoid in the ray source manufacturing process, and the weight of the ray source is increased. Except oxygen-free copper, the anode cap in patent ZL 200420117780.X and patent CN 211788907U is made of tungsten copper, can effectively shield scattered rays and secondary electrons, and reduces the thickness of a ray source shielding layer, but because the tungsten copper is made of powder metallurgy, the residual gas content is high, and because the melting point of copper is low, the saturated vapor pressure is high, the vacuum high-temperature degassing temperature of parts is low, the degassing is difficult to be thoroughly carried out in advance, and hidden troubles are caused on the reliability and the service life of a ray tube.
In view of this, a new anode cap material is sought, on the premise of ensuring thorough vacuum high-temperature degassing, shielding of the anode head beam-emitting rays and secondary electrons is improved so as to reduce the weight of shielding materials in the manufacturing of the ray source, and the anode cap material has important significance for improving the reliability and service life of the ray tube and reducing the manufacturing difficulty of the portable ray source under the same grade.
Disclosure of Invention
It is an object of the present invention to provide a self-shielding X-ray tube and a method for manufacturing the same, which solves the above-mentioned problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a take self-shielding X-ray tube, includes anode assembly, cathode assembly, seal shell, radiator, anode assembly with cathode assembly is respectively through positive pole kovar connecting piece and negative pole kovar connecting piece fixed mounting in seal shell's both ends, seal shell's inside is high vacuum environment, radiator tight fit fixed connection is in anode assembly's afterbody, the heat conduction that produces in the work of anode assembly gives the radiator dispels the heat.
Preferably, the anode assembly comprises a target, an anode head, an anode cap, a window and an anode kovar connector, the target is fixedly connected to the center of the inclined plane at the top of the anode head, the target surface is bombarded by high-speed impact electron flow to generate X-rays, the anode cap is welded at the front end of the anode head to play roles in blocking scattered rays, shielding scattered secondary electrons and dissipating heat, the window is fixed on the anode cap and used for filtering the secondary electrons in the penetrating X-rays, and the tail end of the anode head and the anode kovar connector are integrally soldered by silver.
Preferably, the negative pole subassembly includes focus sleeve, emitter, negative pole kovar connecting piece, conducting rod, negative pole shield plate, focus sleeve riveting assembly is in on the negative pole kovar connecting piece, make the emitter is located the central point of its filament groove and puts for guide electron current direction, the conducting rod passes through glass sintering fixed connection and is in on the negative pole kovar connecting piece, play for the effect that the emitter provided the electric potential, the negative pole kovar connecting piece is regarded as the basement of negative pole subassembly, play connect each part of negative pole with seal shell's effect, the negative pole shield plate is fixed on electron beam reflection route, and the position includes but not limited to focus sleeve bottom, negative pole kovar connecting piece up end or negative pole kovar connecting piece down end position, plays the effect of shielding negative pole end scattering ray and partial secondary electron.
Preferably, the radiator comprises an integrated radiator and a separated radiator, wherein the separated radiator comprises a tungsten ring and a base, and the tungsten ring is fixed inside the base through tight fit nesting.
Preferably, the target material includes, but is not limited to, tungsten, nickel, rhenium, molybdenum, silver, rhodium, palladium, alloys thereof, and the like.
Preferably, the anode cap is made of a high attenuation refractory metal alloy (such as tungsten, tantalum, and the like) as a substrate, and is compounded with other metal materials with low saturation vapor pressure, including but not limited to ferrotungsten, nickel, and the like; or the substrate is the composite material, and the surface of the substrate contains other coating materials; or a material in which the above composite material is nested with other materials.
Preferably, the window material is one of beryllium, pure titanium and titanium alloy.
Preferably, the emitter adopts tungsten base material, the connected mode of emitter with the negative pole kovar connecting piece is not limited to spot welding, tight fit, thread tightening.
Preferably, the focusing sleeve is made of one of carbon steel, alloy steel, nickel or nickel-based alloy.
Preferably, the cathode shielding plate is made by using a high attenuation refractory metal alloy (such as tungsten, tantalum and the like) as a substrate and adding other metal materials with low saturation vapor pressure, including but not limited to ferrotungsten, ferrotungsten and nickel; or the substrate is the composite material, and the surface of the substrate contains other coating materials; or a material in which the above composite material is nested with other materials. .
Preferably, the sealed shell is one of a glass shell, a ceramic shell and a metal shell.
Preferably, the materials of the integrated heat sink and the separate heat sink base include, but are not limited to, aluminum or aluminum alloy, copper or copper alloy, etc., and the materials of the separate heat sink tungsten ring include, but are not limited to, pure tungsten, tungsten copper, tungsten iron nickel, or other tungsten-based, tantalum-based metal materials.
The invention provides a manufacturing method of a self-shielding X-ray tube, which comprises the following steps:
s1: fixing the target material at the center of the top inclined plane of the oxygen-free copper anode head in a casting or welding mode;
s2, the anode cap is fixed on the anode head through welding, and welding materials include but are not limited to silver-copper solder, gold-copper solder or other silver-based solder and gold-based solder added with active metals such as titanium, palladium, nickel and the like;
s3, fixing the window on the anode cap in a fixing mode including but not limited to a mechanical physical and chemical mode such as thread fixing, riveting, nailing, deformation extrusion, welding and the like;
s4, one end of the anode kovar connector is fixed at the tail of the anode head in a silver brazing mode, and the other end of the anode kovar connector is fixed at one end of the sealed shell in a welding or sintering mode;
s5, the emitter is fixed on the cathode kovar connector in a spot welding or thread assembling mode, and the cathode kovar connector is fixed at the other end of the sealed shell in a welding or sintering mode;
s6, the focusing sleeve is fixed on the cathode kovar connector in a threaded assembly mode, so that the emitter is located at the center of the filament groove of the emitter;
s7, the conducting rod is fixedly connected to the cathode kovar connector through glass sintering or vacuum rapid connection;
s8, the cathode shielding plate can be selectively added to the cathode area, the position of the cathode shielding plate is on an electron beam reflection path and includes but is not limited to the position of the bottom of the focusing sleeve, the upper end face of the cathode Kovar connector or the lower end face of the cathode Kovar connector, and the connection mode includes but is not limited to mechanical physical and chemical modes such as thread fixing, riveting, nailing, deformation extrusion, welding and the like;
s9, the radiator specifically comprises an integrated radiator and a separated radiator, the integrated radiator is fixed on the anode head and tail handle in a welding or close-fitting connection mode, a tungsten ring of the separated radiator is fixed inside the base in a close-fitting nested mode, and then the tungsten ring is fixed on the anode head and tail handle in a welding or close-fitting connection mode.
Compared with the prior art, the invention has the beneficial effects that:
the anode cap not only meets the purpose of shielding anode scattered rays and secondary electrons, but also has the characteristics of high melting point and low saturation vapor pressure of material components, so that the anode cap can be thoroughly degassed at high temperature in advance under vacuum, the residual gas content of parts is low, the reliability and the service life of the X-ray tube can be improved, and in order to optimize a shielding mode, the anode cap adopted by the invention comprises a half-coated anode head structure and a full-coated anode head structure, a cathode shielding plate can be selectively added on an electron beam reflection path position in a cathode area, and the radiator comprises a common radiator and a tungsten ring with a shielding nested layer, so that the area of the inherent shielding layer of the X-ray tube is increased, the thickness of a shielding layer of a ray source body can be effectively reduced, the weight of the ray source is reduced, and the difficulty of development of the same-level ray source to a portable direction is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic view of the structure of the anode cap with a half-clad structure according to the present invention;
FIG. 3 is a schematic structural view of an anode cap with a fully encapsulated structure according to the present invention;
FIG. 4 shows a shielding structure of embodiment 1 of the cathode assembly of the present invention;
FIG. 5 shows a shielding structure of embodiment 2 of the cathode assembly of the present invention;
FIG. 6 is a cathode assembly shielding structure embodiment 3 of the present invention;
FIG. 7 is a schematic view of a cathode assembly having a circular window according to the present invention;
FIG. 8 is a schematic view of an anode assembly having a rectangular window according to the present invention;
FIG. 9 is a schematic view of an anode assembly having an annular window according to the present invention;
FIG. 10 is a schematic view of a split heat sink structure according to the present invention;
FIG. 11 is a schematic view of an integrated heat sink structure according to the present invention.
In the figure: 1. an anode assembly; 2. a cathode assembly; 3. sealing the housing; 4. a heat sink; 11. a target material; 12. an anode head; 13. an anode cap; 14. a window; 15. an anode kovar connector; 21. a focusing sleeve; 22. an emitter; 23. a cathode kovar connector; 24. a conductive rod; 25. a cathode shield plate; 41. a tungsten ring; 42. a base.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-11, the present invention provides a technical solution: a self-shielding X-ray tube comprises an anode assembly 1, a cathode assembly 2, a sealed shell 3 and a radiator 4, and specifically comprises a part target 11, an anode head 12, an anode cap 13, a window 14, an anode kovar connector 15, a focusing sleeve 21, an emitter 22, a cathode kovar connector 23, a conducting rod 24, a cathode shielding plate 25, a tungsten ring 41 and a base 42, wherein the anode assembly 1 and the cathode assembly 2 are respectively and fixedly arranged at two ends of the sealed shell 3 through the anode kovar connector 15 and the cathode kovar connector 23 in a connection mode not limited to glass sintering, silver brazing and fusion welding, the inside of the sealed shell 3 is in a high vacuum environment, the radiator 4 is tightly fixed at the tail part of the anode assembly 1, and the connection mode between the radiator 4 and the anode assembly 1 is not limited to tight fitting, threaded connection and welding, the heat generated in the operation of the anode assembly 1 is conducted to the radiator 4 for heat dissipation, the anode assembly 1 comprises a target 11, an anode head 12, an anode cap 13, a window 14 and an anode kovar connector 15, the target 11 is fixed at the center of the top inclined plane of the anode head 12, the anode head 12 is connected with the target 11 in an oxygen-free copper casting mode or welding mode, wherein the welding process is not limited to fusion welding, pressure welding and brazing, the target surface of the target 11 is bombarded by high-speed impact electron flow to generate X-rays, the anode cap 13 is fixed at the front end of the anode head 12, the anode cap 13 plays roles in blocking scattered rays, shielding scattered secondary electrons and dissipating heat, the window 14 is fixed on the anode cap 13 and used for filtering secondary electrons in the penetrating X-rays, and the tail end of the anode head 12 and the anode kovar connector 15 are connected into a whole through silver brazing. The cathode component 2 comprises a focusing sleeve 21, an emitter 22, a cathode kovar connector 23, a conducting rod 24 and a cathode shielding plate 25, wherein the focusing sleeve 21 is assembled on the cathode kovar connector 23 in a threaded manner, the emitter 22 is positioned at the central position of a filament groove of the cathode kovar connector and is used for guiding the direction of electron current, the conducting rod 24 is fixed on the cathode kovar connector 23 through glass sintering and plays a role in providing electric potential for the emitter 22, the cathode kovar connector 23 serves as a substrate of the cathode component 2 and plays a role in connecting each part of a cathode and the sealed shell 3, the cathode shielding plate 25 is added on an electron beam reflection path in a cathode region through welding or mechanical connection, and can be selectively added at the bottom of the focusing sleeve 21, the upper end face of the cathode kovar connector 23 or the lower end face of the cathode kovar connector 23 to play a role in shielding scattered rays at a cathode end and partial secondary electrons;
the separated radiator 4 comprises a tungsten ring 41 and a base 42, the tungsten ring 41 is fixed inside the base 42 through tight fit nesting, and the tungsten ring 41 is made of pure tungsten, tungsten copper, tungsten iron nickel or other tungsten-based or tantalum-based metal materials; the target 11 is made of one of tungsten, nickel, rhenium, molybdenum, silver, rhodium, palladium and alloys thereof, the anode cap 13 is made of a high-attenuation and refractory metal alloy (tantalum, tungsten and the like) as a metal material of a substrate, including but not limited to a tungsten iron nickel material, or a tungsten and tantalum substrate material formed by adding other high-attenuation and low-saturation vapor pressure metal elements, or a tungsten substrate material with a coating on the surface, or a nested material with a shell containing tungsten, tantalum substrate metal or alloys, the window 14 is made of one of beryllium, pure titanium and titanium alloys, the emitter 22 is made of a tungsten-based material, the connection mode of the emitter 22 and the cathode kovar connector 23 is not limited to spot welding, tight fitting and thread fixing, the focusing sleeve 21 is made of one of carbon steel, alloy steel, nickel or nickel-based alloys, and the sealing shell 3 is made of one of a glass shell, a ceramic shell and a metal shell.
A manufacturing method of a self-shielding X-ray tube comprises the following steps:
s1: fixing a target material 11 at the center of the top inclined plane of an oxygen-free copper anode head 12 in a casting or welding mode;
s2, fixing the anode cap 13 on the anode head 12 through welding;
s3, fixing the window 14 on the anode cap 13 through mechanical physical and chemical modes such as thread fixing, riveting, nailing, deformation extrusion, welding and the like;
s4, one end of an anode Kovar connector 15 is fixed at the tail position of an anode head 12 in a silver brazing mode, and the other end of the anode Kovar connector is fixed at one end of a sealed shell 3 in a welding or sintering mode;
s5, the emitter 22 is fixed on the cathode kovar connector 23 in a spot welding or thread assembling mode, and the cathode kovar connector 23 is fixed at the other end of the sealed shell 3 in a welding or sintering mode;
s6, fixing the focusing sleeve 21 on the cathode kovar connector 23 in a threaded assembly mode, and enabling the emitter 22 to be located at the center of a filament groove of the emitter;
s7, the conducting rod 24 is fixedly connected to the cathode kovar connector 23 through glass sintering or vacuum rapid connection;
s8, selectively adding a cathode shielding plate 25 in the cathode region, wherein the position is on an electron beam reflection path, including but not limited to the position of the bottom of the focusing sleeve 21, the upper end face of the cathode Kovar connector 23 or the lower end face of the cathode Kovar connector 23, and the mechanical physical and chemical modes such as thread fixing, riveting, nailing, deformation extrusion, welding and the like can be adopted;
s9, the radiator 4 specifically comprises an integrated radiator and a separated radiator, the integrated radiator is fixed on the tail handle of the anode head 12 in a welding or tight-fitting connection mode, a tungsten ring 41 of the separated radiator is fixed inside a base 42 in a tight-fitting nesting mode, and then the separated radiator is fixed on the tail handle of the anode head 12 in a welding or tight-fitting connection mode.
The working principle is as follows: firstly, fixing a target material 11 at the central position of the top inclined plane of an oxygen-free copper anode head 12 by casting or welding, fixing an anode cap 13 on the anode head 12 by welding, fixing a window 14 on the anode cap 13 by mechanical physical and chemical methods such as thread fixing, riveting, nailing, deformation extrusion, welding and the like, fixing one end of an anode kovar connector 15 at the tail position of the anode head 12 by silver brazing, fixing the other end of the anode kovar connector at one end of a sealed shell 3 by welding or sintering, fixing an emitter 22 on a cathode kovar connector 23 by spot welding or thread assembly, fixing the cathode kovar connector 23 at the other end of the sealed shell 3 by welding or sintering, fixing a focusing sleeve 21 on the cathode kovar connector 23 by thread assembly, and enabling the emitter 22 to be positioned at the central position of a filament groove of the focusing sleeve 21, the conductive rod 24 is connected and fixed on the cathode kovar connector 23 through glass sintering or vacuum flying, the radiator 4 is not limited to an integrated radiator 4 and a separated radiator 4, the integrated radiator 4 is fixed on the tail handle of the anode head 12 through welding or tight fit connection, the tungsten ring 41 of the separated radiator 4 is fixed inside the base 42 through tight fit nesting and then fixed on the tail handle of the anode head 12 through welding or tight fit connection, the invention adopts high attenuation and refractory metal alloy (tantalum, tungsten and the like) as the metal material of the base, including but not limited to tungsten iron nickel material, or tungsten and tantalum base material composed of other high attenuation and low saturation vapor pressure metal elements, or tungsten base material with plating layer on the surface, or nested material with tungsten, tantalum base metal or alloy on the shell to prepare the anode cap 13, the anode cap 13 not only meets the purpose of shielding anode scattered rays and secondary electrons, meanwhile, the characteristics of high melting point and low saturated vapor pressure of the material components can enable the anode cap 13 to be thoroughly degassed at high temperature in advance, the residual gas content of parts is low, the reliability and the service life of the ray tube can be improved, in order to optimize the shielding mode, the anode cap 13 adopted by the invention comprises a half-coated anode head structure and a full-coated anode head structure, a cathode shielding plate 25 can be selectively added at the position of an electron beam reflection path in a cathode region, and the radiator 4 comprises a common radiator 4 and a tungsten ring 41 with a shielding nested layer, so that the inherent shielding layer area of the ray tube is increased, the thickness of a shielding layer of a ray source body can be effectively reduced, the weight of the ray source is reduced, and the difficulty of development of the same-level ray source to a portable direction is reduced.
Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.
Claims (13)
1. An area is from shielding X-ray tube, includes anode assembly (1), cathode assembly (2), sealed shell (3), radiator (4), its characterized in that: anode Assembly (1) with cathode assembly (2) is respectively through positive pole kovar connecting piece (15) and negative pole kovar connecting piece (23) fixed mounting the both ends of seal shell (3), the inside of seal shell (3) is the high vacuum environment, radiator (4) tight fit fixed connection is in the afterbody of anode assembly (1), the heat conduction that produces in anode assembly (1) work gives radiator (4) dispels the heat.
2. A self-shielding X-ray tube according to claim 1, wherein: anode assembly (1) includes target (11), positive pole head (12), positive pole cap (13), window (14), positive pole kovar connector (15), target (11) fixed connection be in the central point on positive pole head (12) top inclined plane puts, and the electron current bombardment that the target surface of target (11) accepted high-speed impact produces X ray, positive pole cap (13) welding is in the front end of positive pole head (12) plays the secondary electron that blocks scattered ray, shielding scattering and radiating effect, window (14) are fixed on positive pole cap (13) for secondary electron in the X ray that filters the penetrability, the tail end of positive pole head (12) with connect as an organic wholely through silver brazing between positive pole kovar connector (15).
3. A self-shielding X-ray tube according to claim 1, wherein: cathode assembly (2) are including focus sleeve (21), emitter (22), negative pole kovar connecting piece (23), conducting rod (24), negative pole shield plate (25), focus sleeve (21) screw assembly is in on negative pole kovar connecting piece (23), just emitter (22) are located the central point of its filament groove and put, conducting rod (24) tight fit fixed connection be in on negative pole kovar connecting piece (23), play for emitter (22) provide the effect of electric potential, negative pole kovar connecting piece (23) conduct the base of cathode assembly (2), play connect each part of negative pole with the effect of seal housing (3), negative pole shield plate (25) are fixed on electron beam reflection route through welding or mechanical connection, and optional interpolation is in focus sleeve (21) bottom negative pole kovar connecting piece (23) up end or the position of terminal surface under negative pole kovar connecting piece (23) plays the effect of shielding negative pole end scattering ray and partial secondary electron.
4. The X-ray tube with self-shielding of claim 1, wherein: the radiator (4) comprises a tungsten ring (41) and a base (42), and the tungsten ring (41) is fixed inside the base (42) through tight fit nesting.
5. The X-ray tube with self-shielding of claim 2, wherein: the target (11) is made of one of tungsten, nickel, rhenium, molybdenum, silver, rhodium and palladium.
6. A self-shielding X-ray tube according to claim 2, wherein: the anode cap (13) uses a high attenuation, refractory metal alloy as a substrate.
7. A self-shielding X-ray tube according to claim 2, wherein: the window (14) is made of one of beryllium, pure titanium and titanium alloy.
8. A self-shielding X-ray tube according to claim 3, wherein: the emitter (22) is made of tungsten-based materials, reserve type or cold high-pressure emitting materials.
9. A self-shielding X-ray tube according to claim 3, wherein: the focusing sleeve (21) is made of one of carbon steel, alloy steel, nickel or nickel-based alloy.
10. A self-shielding X-ray tube according to claim 3, wherein: the cathode shield (25) uses a highly attenuating, refractory metal alloy (e.g., tungsten, tantalum, etc.) as a substrate.
11. The X-ray tube with self-shielding of claim 1, wherein: the sealed shell (3) adopts one of a glass shell, a ceramic shell and a metal shell.
12. The X-ray tube with self-shielding of claim 4, wherein: the radiator is made of one of aluminum or aluminum alloy, copper or copper alloy, and the tungsten ring (42) of the separated radiator is made of high-attenuation refractory metal alloy (such as tungsten, tantalum and the like) as a substrate.
13. A self-shielding X-ray tube according to claims 1 to 12, produced by a method comprising the steps of:
s1: fixing a target (11) at the center of the top inclined plane of an oxygen-free copper anode head (12) in a casting or welding mode;
s2, the anode cap (13) is fixed on the anode head (12) through welding, and welding materials include but are not limited to silver-based, copper-based, nickel-based and gold-based solders or other silver-based, copper-based, nickel-based and gold-based solders added with active metals such as titanium, palladium and nickel;
s3, fixing the window (14) on the anode cap (13) in a fixing mode including but not limited to a mechanical physical and chemical mode such as thread fixing, riveting, nailing, deformation extrusion, welding and the like;
s4, one end of an anode kovar connector (15) is fixed at the tail position of the anode head (12) in a silver brazing mode, and the other end of the anode kovar connector is fixed at one end of the sealed shell (3) in a welding or sintering mode;
s5, the emitter (22) is fixed on the cathode kovar connector (23) in a spot welding or thread assembling mode, and the cathode kovar connector (23) is fixed at the other end of the sealed shell (3) in a welding or sintering mode;
s6, fixing the focusing sleeve (21) on the cathode kovar connector (23) in a threaded assembly mode to enable the emitter (22) to be located at the center of the emitter groove;
s7, the conducting rod (24) is connected and fixed on the cathode kovar connector (23) through glass sintering or vacuum rapid connection;
s8, optionally adding a cathode shielding plate (25) in the cathode area, wherein the position is on an electron beam reflection path and comprises but is not limited to the position of the bottom of the focusing sleeve (21), the upper end surface of the cathode kovar connector (23) or the lower end surface of the cathode kovar connector (23), and the connection mode comprises but is not limited to mechanical physical and chemical modes such as thread fixing, riveting, nailing, deformation extrusion, welding and the like;
s9, the radiator (4) specifically comprises an integrated radiator and a separated radiator, the integrated radiator is fixed on the tail handle of the anode head (12) in a welding or close-fit connection mode, a tungsten ring (41) of the separated radiator is fixed inside a base (42) in a close-fit nested mode, and then the tungsten ring is fixed on the tail handle of the anode head (12) in a welding or close-fit connection mode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110402812.9A CN115206755A (en) | 2021-04-14 | 2021-04-14 | X-ray tube with self-shielding function and manufacturing method thereof |
| PCT/CN2022/075922 WO2022218018A1 (en) | 2021-04-14 | 2022-02-10 | Self-shielded x-ray tube and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110402812.9A CN115206755A (en) | 2021-04-14 | 2021-04-14 | X-ray tube with self-shielding function and manufacturing method thereof |
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| CN115206755A true CN115206755A (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110402812.9A Pending CN115206755A (en) | 2021-04-14 | 2021-04-14 | X-ray tube with self-shielding function and manufacturing method thereof |
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| Country | Link |
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| CN (1) | CN115206755A (en) |
| WO (1) | WO2022218018A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115985739A (en) * | 2023-03-22 | 2023-04-18 | 安徽科昂新材料科技有限公司 | Zero-lag super heat conductor heat dissipation structure for anode of x-ray tube |
| CN116705578A (en) * | 2023-08-04 | 2023-09-05 | 上海超群检测科技股份有限公司 | Anode assembly with shielding dissipative electron structure, X-ray tube and method of manufacture |
| CN116825594A (en) * | 2023-08-29 | 2023-09-29 | 上海超群检测科技股份有限公司 | X-ray tube anode and X-ray tube |
| CN116978762A (en) * | 2023-09-22 | 2023-10-31 | 上海超群检测科技股份有限公司 | Pocket welding method for anode assembly |
| CN117596759A (en) * | 2024-01-19 | 2024-02-23 | 上海超群检测科技股份有限公司 | X-ray apparatus |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6519318B1 (en) * | 1999-07-12 | 2003-02-11 | Varian Medical Systems, Inc. | Large surface area x-ray tube shield structure |
| CN2746516Y (en) * | 2004-10-26 | 2005-12-14 | 王建军 | Firmed environmental protection fixed anode X-ray tube |
| CN101521135B (en) * | 2009-03-26 | 2011-04-13 | 公安部第一研究所 | Grid-control nanocarbon cathode field emission X-ray pipe |
| CN106941064B (en) * | 2017-04-25 | 2018-11-09 | 成都凯赛尔电子有限公司 | X-ray tube and its manufacturing method |
| CN108109893A (en) * | 2018-02-05 | 2018-06-01 | 公安部第研究所 | One kind can cut down stem grid-controlled X-ray tube |
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2021
- 2021-04-14 CN CN202110402812.9A patent/CN115206755A/en active Pending
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2022
- 2022-02-10 WO PCT/CN2022/075922 patent/WO2022218018A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115985739A (en) * | 2023-03-22 | 2023-04-18 | 安徽科昂新材料科技有限公司 | Zero-lag super heat conductor heat dissipation structure for anode of x-ray tube |
| CN115985739B (en) * | 2023-03-22 | 2023-06-02 | 安徽科昂新材料科技有限公司 | Zero-hysteresis superconducting heat body heat radiation structure for anode of x-ray tube |
| CN116705578A (en) * | 2023-08-04 | 2023-09-05 | 上海超群检测科技股份有限公司 | Anode assembly with shielding dissipative electron structure, X-ray tube and method of manufacture |
| CN116705578B (en) * | 2023-08-04 | 2023-10-31 | 上海超群检测科技股份有限公司 | Anode assembly with shielding dissipative electron structure, X-ray tube and method of manufacture |
| CN116825594A (en) * | 2023-08-29 | 2023-09-29 | 上海超群检测科技股份有限公司 | X-ray tube anode and X-ray tube |
| CN116825594B (en) * | 2023-08-29 | 2023-11-17 | 上海超群检测科技股份有限公司 | X-ray tube anode and X-ray tube |
| CN116978762A (en) * | 2023-09-22 | 2023-10-31 | 上海超群检测科技股份有限公司 | Pocket welding method for anode assembly |
| CN116978762B (en) * | 2023-09-22 | 2023-11-24 | 上海超群检测科技股份有限公司 | Pocket welding method for anode assembly |
| CN117596759A (en) * | 2024-01-19 | 2024-02-23 | 上海超群检测科技股份有限公司 | X-ray apparatus |
| CN117596759B (en) * | 2024-01-19 | 2024-04-05 | 上海超群检测科技股份有限公司 | X-ray apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022218018A1 (en) | 2022-10-20 |
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