CN108922843B - X-ray source radiation protection assembly for metal ceramic tube - Google Patents
X-ray source radiation protection assembly for metal ceramic tube Download PDFInfo
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- CN108922843B CN108922843B CN201810781117.6A CN201810781117A CN108922843B CN 108922843 B CN108922843 B CN 108922843B CN 201810781117 A CN201810781117 A CN 201810781117A CN 108922843 B CN108922843 B CN 108922843B
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- metal
- cylinder
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- lead
- tube
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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
- H01J2235/00—X-ray tubes
- H01J2235/16—Vessels
- H01J2235/165—Shielding arrangements
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Abstract
The invention discloses an X-ray source ray protection component for a metal ceramic tube, which comprises the metal ceramic tube, a lead cylinder and a metal cylinder with a hollow inner cavity; the wall of the metal cylinder is provided with a hollow interlayer matched with the shape and the size of the lead cylinder, and the lead cylinder is wrapped in the hollow interlayer of the metal cylinder; the metal ceramic tube is arranged in the hollow inner cavity of the metal cylinder, and the metal shell of the metal ceramic tube is contacted with the inner wall of the metal cylinder; the thickness of the part of the inner wall of the lead cylinder corresponding to the position of the metal shell of the metal ceramic tube is larger than that of other parts of the inner wall of the lead cylinder. The invention not only improves the protection effect of X-rays and lightens the weight of the ray source, but also meets the grounding requirement of the metal ceramic tube, simultaneously avoids the lead particles on the surface of the lead cylinder from contacting with insulating oil, and improves the stability of the ray source.
Description
Technical Field
The invention relates to the technical field of X-ray sources, in particular to an X-ray source ray protection component for a metal ceramic tube.
Background
The cermet tube is a short name of cermet X-ray tube, which uses metal as sleeve and ceramic as shell, and is a vacuum electronic device for generating X-ray by impacting metal target surface with high-speed electron. An X-ray source is a system for generating X-rays, and is a relatively precise high-voltage power supply system for providing a cathode-anode high voltage and a cathode filament voltage to an X-ray tube inside the X-ray source.
When the cermet tube is installed in the X-ray source, the metal shell is required to be grounded to ensure that the tube wall does not accumulate charges, so that the working stability of the cermet tube can be improved. The X-ray leakage dose at the metal housing position is maximum when the cermet tube is in operation.
The X-ray source is operated with a radiation leakage dose around the source being controlled to a very low range, for example: less than or equal to 5 mu Gy/h, this requires that the radiation source must have good radiation protection. The current radiation protection material with highest cost performance is lead and derivatives thereof, but if lead particles on the surface of the lead material are mixed into insulating oil of an X-ray source, the insulating strength of the insulating oil can be reduced, and further the radiation source can be ignited.
At present, three main ways of setting the radiation protection material are:
(1) A protective structure of lead oxide or lead peroxide material is used inside the X-ray source. The technical proposal utilizes the characteristics that lead oxide or lead peroxide material has both radiation protection capability and high-voltage insulation capability, and is processed into a cylinder shape in most of radiation sources, wrapped around a metal ceramic tube to form local protection, or processed into a plate shape and placed at two ends of a cathode and an anode. However, this approach has the disadvantage of: the radiation protection capability is low, and the protection capability of the lead oxide or lead peroxide material is 30% -40% of that of the lead material with the same thickness; the lead oxide or lead peroxide material is made of lead oxide or lead peroxide powder, and the powder metallurgy process is needed before the machining. In addition, since the ceramic tube is an insulating material, a metal ceramic tube grounding structure needs to be additionally designed.
(2) A protective structure of lead material is used inside the X-ray source. The technical proposal utilizes the characteristics of high cost performance and good ray protection effect of lead materials to process the lead materials into a cylinder or a plate and install the lead materials on the inner wall of the X-ray source. The disadvantage of this approach is that lead particles on the surface of the lead material are easily mixed into the insulating oil of the X-ray source, which reduces its insulation strength and may cause the source to fire; the lead material has poor processability, low dimensional accuracy, can not process threads and is not easy to connect with other parts; lead materials have poor conductivity and require an additional design of a cermet grounding structure.
(3) A protective structure of lead material is used outside the X-ray source. The technical proposal utilizes the characteristics of high cost performance and good ray protection effect of lead materials to process the lead materials into a cylinder or a plate and install the lead materials on the outer wall of the X-ray source. The disadvantage is that the lead material needs to completely wrap the outer surface of the source to ensure the protective effect, which increases the amount of lead material used and leads to an increase in the weight of the X-ray source.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the X-ray source ray protection component for the metal ceramic tube, which not only improves the X-ray protection effect, lightens the weight of the ray source, but also meets the grounding requirement of the metal ceramic tube, simultaneously avoids lead particles on the surface of the lead cylinder from contacting with insulating oil, and improves the stability of the ray source.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an X-ray source radiation protection assembly for a cermet tube comprises a cermet tube, a lead cylinder and a metal cylinder with a hollow inner cavity; the wall of the metal cylinder is provided with a hollow interlayer matched with the shape and the size of the lead cylinder, and the lead cylinder is wrapped in the hollow interlayer of the metal cylinder; the metal ceramic tube is arranged in the hollow inner cavity of the metal cylinder, and the metal shell of the metal ceramic tube is contacted with the inner wall of the metal cylinder; the thickness of the part of the inner wall of the lead cylinder corresponding to the position of the metal shell of the metal ceramic tube is larger than that of other parts of the inner wall of the lead cylinder.
Further, the metal cylinder is mainly formed by splicing a plurality of metal plates.
Further, the lead cartridge is completely encased within the hollow interlayer.
Further, the middle part of the inner wall of the lead cylinder corresponds to the metal shell position of the metal ceramic tube, so that the inner wall of the lead cylinder has a stepped structure with the thickness descending from the middle part to the two end parts.
Further, the metal shell of the metal ceramic tube is fixed with the metal cylinder through a semicircular metal positioning part, and the inner wall and the outer wall of the semicircular metal positioning part are respectively contacted with the metal shell of the metal ceramic tube and the inner wall of the metal cylinder.
An X-ray source with the X-ray source ray protection assembly comprises an X-ray source metal shell, wherein the X-ray source metal shell is sleeved outside the metal cylinder and is in contact with the outer wall of the metal cylinder.
Further, lead oxide parts are respectively arranged at two ends of the metal shell of the X-ray source, and the lead oxide parts at two ends are fixed with two end surfaces of the metal cylinder.
The invention has the beneficial effects that: the X-ray source ray protection component for the metal ceramic tube is applied to an X-ray source, so that the X-ray protection effect can be improved, and the weight of the ray source is reduced and the grounding requirement of the metal ceramic tube is met due to the fact that the part of the inner wall of the lead cylinder corresponding to the metal shell of the metal ceramic tube is thickened. In addition, the lead cylinder is wrapped by the metal cylinder, so that lead particles on the surface of the lead cylinder can be prevented from contacting insulating oil, and the stability of the ray source is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of the overall structure of embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of a metal cylinder wrapped with a lead cylinder according to example 1 of the present invention;
fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, wherein the following examples are provided on the premise of the present technical solution, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the examples.
Example 1
The present embodiment provides an X-ray source radiation protection assembly for a cermet tube, as shown in fig. 1-2, comprising a cermet tube 1, a lead cylinder 3 and a metal cylinder 2 having a hollow interior 21; the wall of the metal cylinder 2 is provided with a hollow interlayer matched with the shape and the size of the lead cylinder 3, and the lead cylinder 3 is wrapped in the hollow interlayer of the metal cylinder 2; the metal ceramic tube 1 is arranged in the hollow inner cavity of the metal cylinder 2, and the metal shell 11 of the metal ceramic tube is contacted with the inner wall of the metal cylinder 2; the thickness of the portion 31 of the inner wall of the lead cylinder 3 corresponding to the position of the metal shell 11 of the cermet tube 1 is greater than the other portions of the inner wall of the lead cylinder 3.
In this embodiment, the metal cylinder 2 is mainly formed by splicing a plurality of metal plates, the cylinder wall has a hollow interlayer matched with the shape and the size of the lead cylinder, the lead cylinder 3 is completely wrapped in the hollow interlayer, and the cylinder wall encloses a hollow inner cavity.
In this embodiment, the metal cylinder 2 has a cylindrical shape.
In practical applications, the metal cylinder 2 may be made of steel, or may be made of other metal materials.
In the present embodiment, the middle portion of the inner wall of the lead cylinder 3 corresponds to the position of the metal shell 11 of the cermet tube 1, so that the inner wall of the lead cylinder 3 has a stepped structure descending from the middle portion to both end portions. The number of steps may be one or more, and in this embodiment, the inner wall of the lead cylinder 3 has a one-step structure, that is, the middle portion corresponding to the metal shell 11 of the cermet tube 1 is thick, and the two end portions corresponding to the ceramic shell 12 of the cermet tube 1 are thin.
The metal cylinder 2 and the metal shell 11 of the metal ceramic tube 1 can be in direct contact or in indirect contact. In this embodiment, the metal shell 11 of the cermet tube 1 and the metal cylinder 2 are fixed by a semicircular metal positioning part 4, and the inner wall and the outer wall of the semicircular metal positioning part 4 are respectively contacted with the metal shell 11 of the cermet tube 1 and the inner wall of the metal cylinder 2.
When assembling, firstly, the metal ceramic tube 1 and the two semicircular metal positioning parts 4 are fixed in a clamping or screwing mode, and good contact between the metal ceramic tube 1 and the semicircular metal positioning parts 4 is required to be ensured. Then the metal ceramic tube 1 is put into the metal cylinder from one side and fixed by using screws, and the semicircular metal positioning part 4 needs to be ensured to be in good contact with the inner wall of the metal cylinder 2.
Example 2
This embodiment provides an X-ray source with the X-ray source radiation protection assembly of embodiment 1, as shown in fig. 3, comprising an X-ray source metal housing 5, wherein the X-ray source metal housing 5 is sleeved outside the metal tube 2 and contacts with the outer wall of the metal tube 2.
In this embodiment, lead oxide parts 6 are respectively disposed at two ends of the metal casing 5 of the X-ray source, and the lead oxide parts 6 at two ends are fixed to two end surfaces of the metal cylinder 2.
During assembly, the X-ray source radiation protection component for the metal ceramic tube, which is assembled in the embodiment 1, and lead oxide parts 6 at two ends are fixed into a whole through screws, and then the X-ray source radiation protection component is placed into the X-ray source metal shell 5 from one end of the X-ray source metal shell 5 and clamped and fixed. The positive and negative high voltage circuits of the X-ray source are then mounted and connected to the cermet tube 1. And finally, installing other components of the X-ray source, sealing, vacuumizing the X-ray source and injecting insulating oil.
In practical application, the X-ray source ray protection component for the metal ceramic tube can be directly placed into the metal shell of the X-ray source without using lead oxide parts, and the two outer end faces of the X-ray source are changed for ray protection.
In this embodiment, by applying the X-ray source radiation protection assembly for a cermet tube provided in embodiment 1 to an X-ray source, not only the protection effect of X-rays can be improved, but also the weight of the radiation source is reduced and the grounding requirement of the cermet tube is satisfied due to the adoption of the structure that the part of the inner wall of the lead cylinder corresponding to the position of the metal shell of the cermet tube is thickened. In addition, the lead cylinder is wrapped by the metal cylinder, so that lead particles on the surface of the lead cylinder can be prevented from contacting insulating oil, and the stability of the ray source is improved.
Various modifications and variations of the present invention will be apparent to those skilled in the art in light of the foregoing teachings and are intended to be included within the scope of the following claims.
Claims (7)
1. An X-ray source radiation protection assembly for a cermet tube, comprising a cermet tube, a lead cylinder and a metal cylinder having a hollow interior; the wall of the metal cylinder is provided with a hollow interlayer matched with the shape and the size of the lead cylinder, and the lead cylinder is wrapped in the hollow interlayer of the metal cylinder; the metal ceramic tube is arranged in the hollow inner cavity of the metal cylinder, and the metal shell of the metal ceramic tube is contacted with the inner wall of the metal cylinder; the thickness of the part of the inner wall of the lead cylinder corresponding to the position of the metal shell of the metal ceramic tube is larger than that of other parts of the inner wall of the lead cylinder.
2. The X-ray source radiation protection assembly for a cermet tube according to claim 1, wherein the metal tube is mainly formed by splicing a plurality of metal plates.
3. The X-ray source radiation protection assembly for a cermet tube according to claim 1, wherein the lead cartridge is fully encased within the hollow interlayer.
4. The X-ray source radiation protection assembly for a cermet tube according to claim 1, wherein the middle portion of the inner wall of the lead drum corresponds to the metal housing of the cermet tube so that the inner wall of the lead drum has a stepped structure in which the thickness decreases from the middle portion to both end portions.
5. The X-ray source radiation protection assembly for a cermet tube according to claim 1, wherein the metal housing of the cermet tube and the metal tube are fixed by a semicircular metal locating part, the inner wall and the outer wall of which are in contact with the metal housing of the cermet tube and the inner wall of the metal tube, respectively.
6. An X-ray source having an X-ray source radiation protection assembly according to any one of claims 1-5, comprising an X-ray source metal housing, said X-ray source metal housing being sleeved on the exterior of said metal tube and in contact with the outer wall of said metal tube.
7. The X-ray source according to claim 6, wherein both ends of the X-ray source metal housing are respectively provided with lead oxide parts, and both ends of the lead oxide parts are fixed to both end surfaces of the metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810781117.6A CN108922843B (en) | 2018-07-17 | 2018-07-17 | X-ray source radiation protection assembly for metal ceramic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810781117.6A CN108922843B (en) | 2018-07-17 | 2018-07-17 | X-ray source radiation protection assembly for metal ceramic tube |
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| Publication Number | Publication Date |
|---|---|
| CN108922843A CN108922843A (en) | 2018-11-30 |
| CN108922843B true CN108922843B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810781117.6A Active CN108922843B (en) | 2018-07-17 | 2018-07-17 | X-ray source radiation protection assembly for metal ceramic tube |
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Citations (10)
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|---|---|---|---|---|
| EP0530424A1 (en) * | 1991-09-03 | 1993-03-10 | Andrex Radiation Products A/S | An x-ray generating apparatus |
| JPH10214582A (en) * | 1997-01-30 | 1998-08-11 | Toshiba Electron Eng Corp | Cylinder for x-ray tube apparatus and manufacture thereof |
| JP2003115272A (en) * | 2001-10-03 | 2003-04-18 | Shimadzu Corp | Rotary anode x-ray tube device |
| CN1711008A (en) * | 2005-07-15 | 2005-12-21 | 北京中盾安民分析技术有限公司 | Sectional-drum-shape X-ray source |
| CN201681787U (en) * | 2010-05-13 | 2010-12-22 | 杭州万东电子有限公司 | X-ray tube provided with lead protection device |
| CN201780961U (en) * | 2010-07-15 | 2011-03-30 | 赵福元 | Breast X-ray tube |
| CN202385376U (en) * | 2011-12-16 | 2012-08-15 | 宿迁波尔高压电源有限公司 | X-ray source |
| CN102986303A (en) * | 2010-07-21 | 2013-03-20 | 株式会社蛟簿 | X-ray generation device |
| CN108028159A (en) * | 2015-08-10 | 2018-05-11 | 东芝电子管器件株式会社 | The manufacture method of X-ray tube, X-ray pipe device and X-ray pipe device |
| CN208336144U (en) * | 2018-07-17 | 2019-01-04 | 公安部第一研究所 | A kind of x-ray source radiation protection component for metal ceramic tube |
-
2018
- 2018-07-17 CN CN201810781117.6A patent/CN108922843B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0530424A1 (en) * | 1991-09-03 | 1993-03-10 | Andrex Radiation Products A/S | An x-ray generating apparatus |
| JPH10214582A (en) * | 1997-01-30 | 1998-08-11 | Toshiba Electron Eng Corp | Cylinder for x-ray tube apparatus and manufacture thereof |
| JP2003115272A (en) * | 2001-10-03 | 2003-04-18 | Shimadzu Corp | Rotary anode x-ray tube device |
| CN1711008A (en) * | 2005-07-15 | 2005-12-21 | 北京中盾安民分析技术有限公司 | Sectional-drum-shape X-ray source |
| CN201681787U (en) * | 2010-05-13 | 2010-12-22 | 杭州万东电子有限公司 | X-ray tube provided with lead protection device |
| CN201780961U (en) * | 2010-07-15 | 2011-03-30 | 赵福元 | Breast X-ray tube |
| CN102986303A (en) * | 2010-07-21 | 2013-03-20 | 株式会社蛟簿 | X-ray generation device |
| CN202385376U (en) * | 2011-12-16 | 2012-08-15 | 宿迁波尔高压电源有限公司 | X-ray source |
| CN108028159A (en) * | 2015-08-10 | 2018-05-11 | 东芝电子管器件株式会社 | The manufacture method of X-ray tube, X-ray pipe device and X-ray pipe device |
| CN208336144U (en) * | 2018-07-17 | 2019-01-04 | 公安部第一研究所 | A kind of x-ray source radiation protection component for metal ceramic tube |
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| CN108922843A (en) | 2018-11-30 |
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