CN110993469A - Cathode head assembly, X-ray tube cathode, X-ray tube and X-ray device - Google Patents
Cathode head assembly, X-ray tube cathode, X-ray tube and X-ray device Download PDFInfo
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- CN110993469A CN110993469A CN201911370151.5A CN201911370151A CN110993469A CN 110993469 A CN110993469 A CN 110993469A CN 201911370151 A CN201911370151 A CN 201911370151A CN 110993469 A CN110993469 A CN 110993469A
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- Prior art keywords
- cathode
- ray tube
- head assembly
- connecting rod
- metal connecting
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 38
- 239000000919 ceramic Substances 0.000 claims description 22
- 238000003384 imaging method Methods 0.000 claims description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 19
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
-
- 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
- H01J35/06—Cathodes
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- X-Ray Techniques (AREA)
Abstract
The invention discloses a cathode head assembly, an X-ray tube cathode, an X-ray tube and an X-ray device, wherein the cathode head assembly comprises a base; the filament is connected with a first metal connecting rod and is arranged on the base through the first metal connecting rod; and the beam-gathering block is connected with a second metal connecting rod and is arranged on the base through the second metal connecting rod and positioned on two sides of the filament. The cathode head assembly is of a modular structure, production difficulty is reduced, production efficiency is improved, the cathode head assembly is suitable for cathodes of various X-ray tubes, and universality of the cathode head assembly is improved.
Description
Technical Field
The invention relates to the technical field of X-ray tubes, in particular to a cathode head assembly, an X-ray tube cathode, an X-ray tube and an X-ray device.
Background
The existing X-ray tube cathodes are basically designed one-to-one, the X-ray tube cathodes of all products are independent, the universality is poor, the processing is complicated, and the resources are extremely wasted.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a cathode head assembly which can realize modular design and improve the universality of products.
The invention also provides an X-ray tube cathode with the cathode head assembly.
The invention also provides an X-ray tube with the X-ray tube cathode.
The invention also provides an X-ray device with the X-ray tube.
A cathode head assembly according to an embodiment of the first aspect of the invention, includes a base; the filament is connected with a first metal connecting rod and is arranged on the base through the first metal connecting rod; and the beam-gathering block is connected with a second metal connecting rod and is arranged on the base through the second metal connecting rod and positioned on two sides of the filament.
The cathode head assembly according to the embodiment of the invention has at least the following beneficial effects:
the cathode head assembly is of a modular structure, production difficulty is reduced, production efficiency is improved, the cathode head assembly is suitable for cathodes of various X-ray tubes, and universality of the cathode head assembly is improved.
According to some embodiments of the invention, the filament is provided with a baffle at both ends.
According to some embodiments of the invention, a guard ring is disposed on the base and outside the filament.
According to some embodiments of the invention, the side wall of the base is provided with a snap-in portion.
According to some embodiments of the invention, the bunching block and the second metal connecting rod are both made of molybdenum.
According to some embodiments of the invention, the first metal connecting rod is a nickel rod.
An X-ray tube cathode according to an embodiment of the second aspect of the invention comprises: the cathode ceramic assembly is provided with a plurality of binding posts; according to the cathode head assembly of the embodiment of the first aspect of the invention, a cathode head connecting piece is connected with the cathode ceramic assembly through the cathode head connecting piece, and the first metal connecting rod and the second metal connecting rod are respectively and electrically connected with the corresponding binding posts.
The X-ray tube cathode according to the embodiment of the invention has at least the following beneficial effects:
the cathode ceramic assembly and the cathode head assembly are of modular structures, production difficulty is reduced, production efficiency is improved, the cathode head assembly can be connected with the cathode ceramic assembly through different cathode head connecting pieces to form different X-ray tube cathodes, and universality of the X-ray tube cathodes is improved.
According to some embodiments of the invention, a getter is mounted within the cathode ceramic assembly.
An X-ray tube according to an embodiment of the third aspect of the invention comprises an X-ray tube cathode according to an embodiment of the second aspect of the invention.
The X-ray tube provided by the embodiment of the invention has at least the following beneficial effects:
the cathode ceramic assembly and the cathode head assembly are of modular structures, the production difficulty is reduced, the improvement of production efficiency is facilitated, the cathode head assembly can be connected with the cathode ceramic assembly through different cathode head connecting pieces to form different X-ray tube cathodes, and the improvement of the universality of products is facilitated.
An X-ray device according to an embodiment of a fourth aspect of the invention, comprising: an imaging device; an X-ray tube according to an embodiment of a third aspect of the present invention is provided on a side of the imaging device for outputting X-rays to the imaging device.
The X-ray device provided by the embodiment of the invention has at least the following beneficial effects:
the cathode ceramic assembly and the cathode head assembly are of modular structures, the production difficulty is reduced, the improvement of production efficiency is facilitated, the cathode head assembly can be connected with the cathode ceramic assembly through different cathode head connecting pieces to form different X-ray tube cathodes, and the improvement of the universality of products is facilitated.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a cathode head assembly according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the cathode head assembly shown in FIG. 1;
FIG. 3 is a schematic structural diagram of a cathode head assembly according to an embodiment of the present invention;
fig. 4 is an exploded view of the structure of the cathode head assembly shown in fig. 3;
FIG. 5 is a schematic structural diagram of a cathode of an X-ray tube according to an embodiment of the present invention;
FIG. 6 is an enlarged fragmentary view of circled location A in FIG. 5;
FIG. 7 is a schematic structural diagram of a cathode of an X-ray tube according to an embodiment of the present invention;
fig. 8 is a partially enlarged view of circled position B in fig. 7.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, the present embodiment discloses a cathode head assembly, which includes a base 110, a filament 120 and a bunching block 130; the filament 120 is connected with a first metal connecting rod 121 and is mounted on the base 110 through the first metal connecting rod 121; the bunching block 130 is connected with a second metal connecting rod 131, and is installed on the base 110 and located at both sides of the filament 120 through the second metal connecting rod 131. Wherein, for the installation during convenient production, first metal connecting rod 121 and second metal connecting rod 131 all wear to locate base 110 so that form the lug for welding. The cathode head assembly 100 of the embodiment of the invention is of a modular structure, reduces the production difficulty and is beneficial to improving the production efficiency, the cathode head assembly 100 is suitable for various X-ray tube cathodes, the installation position is flexible, and the universality of the cathode head assembly 100 is beneficial to improving.
The working principle of the cathode head assembly of the embodiment of the invention is as follows:
referring to fig. 2, the filament 120 is electrically connected through the first metal connecting rod 121 for emitting electrons, the beam focusing blocks 130 respectively disposed at both sides of the filament 120 are respectively connected to the same negative voltage through the second metal connecting rod 131, and the two beam focusing blocks 130 form a negative voltage electric field 132 corresponding to the filament 120. The range in which electrons emitted from the filament 120 are pushed toward the center by the negative voltage electric field 132 is also varied by adjusting the voltage applied to the second metal link 131, and when the voltage is adjusted to a certain proper value, the electrons are concentrated at one point to achieve bunching. The beam-focusing block 130 of the embodiment of the invention can adjust the size of the electron beam focus by adjusting the voltage, which is beneficial to improving the quality of products.
Referring to fig. 3 and 4, since the beam-focusing blocks 130 are respectively disposed at two sides of the filament 120, the negative-voltage electric field at two ends of the filament 120 is slightly weak, and a part of electrons are scattered at two ends of the filament 120, and in order to reduce the escape of electrons, blocking pieces 140 are respectively disposed at two ends of the filament 120.
Referring to fig. 3 and 4, in order to further reduce the electron emission, a guard ring 150 is disposed on the base 110 and outside the filament 120. Specifically, the guard ring 150 is sleeved outside the beam converging block 130, and is clamped on the base 110 or is installed with the base 110 by a screw thread.
Referring to fig. 3 and 4, for the convenience of assembly, the sidewall of the base 110 is provided with a clamping portion 111. Specifically, the base 110 is a cylindrical structure, and a flat section is provided on the peripheral wall of the base 110, and the section is a clamping portion 111. When the installation, base 110 passes through joint portion 111 and realizes quick location to the joint is on the connecting piece, and can avoid base 110 to rotate at will, is favorable to improving the firm degree of assembly.
Because the cathode head assembly 100 can generate a large amount of heat when emitting electrons, and the temperature of the bunching block 130 is high, the bunching block 130 and the second metal connecting rod 131 are both made of molybdenum materials, and the molybdenum materials have good high-temperature conductivity and mechanical strength, so that the bunching block 130 and the second metal connecting rod 131 can be ensured to have good performance in a high-temperature environment, and the reliability of products can be improved.
In order to improve the quality of the product, the first metal link 121 is a nickel link. The nickel rod has the characteristics of high temperature and low resistance, and the resistance of the first metal connecting rod 121 can be reduced when the nickel rod is used, so that the heat productivity of the first metal connecting rod 121 is reduced, and the product has higher energy utilization rate.
Referring to fig. 5 or fig. 7, a second aspect of the present invention discloses an X-ray tube cathode, which includes a cathode ceramic assembly 200 and a cathode head assembly 100 according to the first aspect of the present invention, wherein the cathode ceramic assembly 200 is provided with a plurality of posts 210; the cathode tap assembly 100 is connected to the cathode tap connector 300 and is connected to the cathode ceramic assembly 200 through the cathode tap connector 300, and the first metal connecting rod 121 and the second metal connecting rod 131 are electrically connected to the corresponding terminals 210, respectively. The cathode of the X-ray tube provided by the embodiment of the invention is provided with 5 wiring columns 210, so that the wiring requirement of the cathode of the X-ray tube can be met.
Cathode ceramic assembly 200 and cathode head assembly 100 are modular structure, reduce the production degree of difficulty, be favorable to improving production efficiency, please refer to fig. 5 and fig. 7, cathode head connecting piece 300 has multiple structure, cathode head assembly 100 can be connected with cathode ceramic assembly 200 through different cathode head connecting piece 300, can satisfy the demand of the different mounted position of cathode head assembly 100, constitute different X-ray tube cathodes, use in a flexible way, be favorable to improving the commonality of X-ray tube cathode. Referring to fig. 6 or 8, in order to improve the quality of the product, the first metal connecting rod 121 and the second metal connecting rod 131 are respectively welded to the corresponding terminals 210 through the welding bars 220, and the welding bars 220 are nickel rods having high-temperature and low-resistance characteristics, so that the heat generated during the use of the product can be reduced, and the energy utilization rate of the product can be improved.
Referring to fig. 6, in order to ensure the vacuum degree of the cathode of the X-ray tube, a getter 400 is installed in the cathode ceramic assembly 200.
An X-ray tube according to an embodiment of the third aspect of the invention comprises an X-ray tube cathode according to an embodiment of the second aspect of the invention.
The cathode ceramic assembly 200 and the cathode head assembly 100 are of modular structures, so that the production difficulty is reduced, the improvement of the production efficiency is facilitated, the cathode head assembly 100 can be connected with the cathode ceramic assembly 200 through different cathode head connecting pieces 300 to form different X-ray tube cathodes, and the improvement of the universality of products is facilitated.
An X-ray device disclosed in an embodiment of a fourth aspect of the present invention includes an imaging device and an X-ray tube according to an embodiment of the third aspect of the present invention, the X-ray tube being disposed on a side of the imaging device for outputting X-rays to the imaging device.
The cathode ceramic assembly 200 and the cathode head assembly 100 are of modular structures, so that the production difficulty is reduced, the improvement of the production efficiency is facilitated, the cathode head assembly 100 can be connected with the cathode ceramic assembly 200 through different cathode head connecting pieces 300 to form different X-ray tube cathodes, and the improvement of the universality of products is facilitated.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A cathode head assembly, comprising:
a base (110);
the filament (120) is connected with a first metal connecting rod (121) and is arranged on the base (110) through the first metal connecting rod (121);
and the bunching block (130) is connected with a second metal connecting rod (131) and is arranged on the base (110) through the second metal connecting rod (131) and positioned at two sides of the filament (120).
2. The cathode head assembly according to claim 1, wherein a stopper (140) is installed at both ends of the filament (120).
3. The cathode head assembly according to claim 1 or 2, characterized in that a guard ring (150) is provided on the base (110) and outside the filament (120).
4. The cathode head assembly according to claim 1, wherein a side wall of the base (110) is provided with a snap-in portion (111).
5. The cathode head assembly according to claim 1, wherein the bunching block (130) and the second metal connecting rod (131) are both made of molybdenum.
6. The cathode head assembly according to claim 1, wherein the first metal connecting rod (121) is a nickel rod.
7. An X-ray tube cathode, comprising:
a cathode ceramic assembly (200) provided with a plurality of binding posts (210);
the cathode tab assembly (100) according to any one of claims 1 to 6, wherein a cathode tab connector (300) is connected to the cathode ceramic assembly (200) through the cathode tab connector (300), and the first metal connecting rod (121) and the second metal connecting rod (131) are electrically connected to the corresponding posts (210), respectively.
8. The X-ray tube cathode according to claim 7, wherein a getter (400) is mounted within the cathode ceramic assembly (200).
9. An X-ray tube comprising an X-ray tube cathode according to claim 7 or 8.
10. An X-ray device, comprising:
an imaging device;
the X-ray tube of claim 9, disposed on a side of the imaging device, for outputting X-rays to the imaging device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370151.5A CN110993469A (en) | 2019-12-26 | 2019-12-26 | Cathode head assembly, X-ray tube cathode, X-ray tube and X-ray device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911370151.5A CN110993469A (en) | 2019-12-26 | 2019-12-26 | Cathode head assembly, X-ray tube cathode, X-ray tube and X-ray device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110993469A true CN110993469A (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911370151.5A Pending CN110993469A (en) | 2019-12-26 | 2019-12-26 | Cathode head assembly, X-ray tube cathode, X-ray tube and X-ray device |
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| Country | Link |
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| CN (1) | CN110993469A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5125019A (en) * | 1989-03-24 | 1992-06-23 | General Electric Cgr Sa | X-ray scanning tube with deflecting plates |
| WO2003044823A1 (en) * | 2001-11-20 | 2003-05-30 | Koninklijke Philips Electronics Nv | X-ray tube cathode cup structure for focal spot deflection |
| US6594341B1 (en) * | 2001-08-30 | 2003-07-15 | Koninklijke Philips Electronics, N.V. | Liquid-free x-ray insert window |
| US20090022277A1 (en) * | 2007-07-18 | 2009-01-22 | Moxtek, Inc. | Cathode header optic for x-ray tube |
| CN202142494U (en) * | 2011-07-06 | 2012-02-08 | 湖北盛达探伤机械有限公司 | Incense coil type filament X-ray ceramic tube |
| CN208796944U (en) * | 2018-09-30 | 2019-04-26 | 汕头高新区聚德医疗科技有限公司 | A kind of CT bulb cathode |
-
2019
- 2019-12-26 CN CN201911370151.5A patent/CN110993469A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5125019A (en) * | 1989-03-24 | 1992-06-23 | General Electric Cgr Sa | X-ray scanning tube with deflecting plates |
| US6594341B1 (en) * | 2001-08-30 | 2003-07-15 | Koninklijke Philips Electronics, N.V. | Liquid-free x-ray insert window |
| WO2003044823A1 (en) * | 2001-11-20 | 2003-05-30 | Koninklijke Philips Electronics Nv | X-ray tube cathode cup structure for focal spot deflection |
| US20090022277A1 (en) * | 2007-07-18 | 2009-01-22 | Moxtek, Inc. | Cathode header optic for x-ray tube |
| CN202142494U (en) * | 2011-07-06 | 2012-02-08 | 湖北盛达探伤机械有限公司 | Incense coil type filament X-ray ceramic tube |
| CN208796944U (en) * | 2018-09-30 | 2019-04-26 | 汕头高新区聚德医疗科技有限公司 | A kind of CT bulb cathode |
Non-Patent Citations (2)
| Title |
|---|
| 李思源: "《建筑电气工程清单计价编制快学快用》", 31 July 2014 * |
| 编写组: "《荧光灯生产基本知识》", 30 April 1983 * |
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Application publication date: 20200410 |