CN203553096U - Cathode electron gun used for micro-focus X-ray tube - Google Patents
Cathode electron gun used for micro-focus X-ray tube Download PDFInfo
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- CN203553096U CN203553096U CN201320751262.2U CN201320751262U CN203553096U CN 203553096 U CN203553096 U CN 203553096U CN 201320751262 U CN201320751262 U CN 201320751262U CN 203553096 U CN203553096 U CN 203553096U
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- electron gun
- electrode
- filament
- microfocus
- cathode electron
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Abstract
The utility model discloses a cathode electron gun used for a micro-focus X-ray tube. The cathode electron gun includes a glass stem, ceramic electrodes, a filament cap, a cathode cap, an electrode fixing seat and a filament; two of eight electrodes of the glass stem are connected with one end of each ceramic electrode; six of the eight electrodes of the glass stem are connected with the filament cap; the ceramic electrodes are fixed on the electrode fixing seat; the other end of each ceramic electrode is connected with the filament; the electrode fixing seat is fixed inside the filament cap; and the filament cap is arranged inside the cathode cap. With the cathode electron gun used for the micro-focus X-ray tube adopted, the convergence focus of hot electron streams at a stroke of 15mm can reach 30 micro m under a 100KV high-voltage electric field, and therefore, a 30 micro m-focus X-ray tube of which the tube voltage is 100KV can be formed possibly.
Description
Technical field
The utility model relates to electron gun technical field, especially a kind of cathode electron gun for microfocus x ray tube.
Background technology
At present, the X-ray tube of domestic production is large focal spot X-ray tube, and its minimum focus can be accomplished 0.3mm × 0.3mm; Generally for health care and the flaw detection of high-power technique, the fields such as safety check.Along with the development of sciemtifec and technical sphere, there is surface mount (being SMT) technology.Use SMT technology can make electronic product reduced volume 40～60%, weight reduction 60～80%.But the thing followed is traditional detection means, and common focus X-ray ray machine etc. can not meet the requirement of quality and the reliability of existing production product, especially to the defect of components and parts inside, cannot find out.So just there is new detection means, microfocus X-ray machine, the core devices of this equipment is microfocus X-ray pipe, the size of this light pipe focus depends on again cathode electron gun (being the cathode assembly of light pipe), want to make the X-ray tube of little focus, electron stream that just must be superfine, the at present domestic X-ray tube that also there is no focus < 300 μ m.
Utility model content
The utility model, for the deficiencies in the prior art, proposes a kind of cathode electron gun for microfocus X-ray pipe, is the X-ray tube of focus < 300 μ m.
In order to realize above-mentioned utility model object, the utility model provides following technical scheme: a kind of cathode electron gun for microfocus X-ray pipe, comprises glass stem, ceramic electrode, filament cap, cathode shield, electrode holder, filament; Two in eight electrodes of described glass stem are connected with described ceramic electrode one end, and six are connected with described filament cap; Described ceramic electrode is fixed on described electrode holder, and the described ceramic electrode other end is connected with described filament, and described electrode holder is fixed in described filament cap, and described filament cap is located in described cathode shield.
Further, described two electrodes are connected with described ceramic electrode through copper-nickel alloy sheet wire.
Further, described two electrodes are molybdenum electrode.
Further, described six electrodes that are connected with described filament cap are the electrode that molybdenum maybe can cut down making.
Further, described ceramic electrode and described electrode holder are adopted and are screwed.
Further, described filament cap, described cathode shield or described electrode holder adopt 304 stainless steel materials to make.
Further, described ceramic electrode adopts 95% aluminium oxide ceramics and carries out ceramic metallization processing.
Further, described filament adopts pure tungsten to make.
Further, described six electrodes adopt 304 stainless steels to be connected location with described filament cap.
Compared with prior art, the utlity model has following advantage: under the high voltage electric field effect of 100KV, thermionic current the converging focus and can reach 30 μ m of 15mm stroke place, make the x ray tube that focus 30 μ m tube voltages are 100KV become possibility.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure:
1, glass stem; 2, ceramic electrode; 3, filament cap; 4, cathode shield; 5, copper-nickel alloy sheet wire; 6, ceramic electrical electrode seat; 7, filament.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail, the description of this part is only exemplary and explanatory, should not have any restriction to protection range of the present utility model.
A kind of cathode electron gun for microfocus X-ray pipe as shown in Figure 1, comprises glass stem 1, ceramic electrode 2, filament cap 3, cathode shield 4, copper-nickel alloy sheet wire 5, electrode holder 6, filament 7; Two in eight electrodes of described glass stem 1 are connected with described ceramic electrode 2 one end through described copper-nickel alloy sheet wire 5, and six are connected with described filament cap 3; Described ceramic electrode 2 is fixed on described electrode holder 6, and described ceramic electrode 2 other ends are connected with described filament 7, and described electrode holder 6 is fixed in described filament cap 3, and described filament cap 3 is located in described cathode shield 4.
Wherein, described two electrodes that are connected with described ceramic electrode 2 are molybdenum electrode.Other six electrodes that are connected with described filament cap 3 are the electrode that molybdenum maybe can cut down making, adopt 304 stainless steels to be connected location with described filament cap 3.
Described ceramic electrode 2 and described electrode holder 6 are adopted and are screwed.Described filament cap 3, described cathode shield 4 or described electrode holder 6 adopt 304 stainless steel materials to make.Described ceramic electrode 2 adopts 95% aluminium oxide ceramics and carries out ceramic metallization processing.Described filament 7 adopts pure tungsten to make.
The utility model, by new thought, adopts high-tech design, makes domestic production can manufacture the x ray tube of tube voltage 100KV focus 30 μ m.
Claims (9)
1. for a cathode electron gun for microfocus X-ray pipe, it is characterized in that: comprise glass stem, ceramic electrode, filament cap, cathode shield, electrode holder, filament; Two in eight electrodes of described glass stem are connected with described ceramic electrode one end, and six are connected with described filament cap; Described ceramic electrode is fixed on described electrode holder, and the described ceramic electrode other end is connected with described filament, and described electrode holder is fixed in described filament cap, and described filament cap is located in described cathode shield.
2. as claimed in claim 1 for the cathode electron gun of microfocus X-ray pipe, it is characterized in that: described two electrodes are connected with described ceramic electrode through copper-nickel alloy sheet wire.
3. as claimed in claim 2 for the cathode electron gun of microfocus X-ray pipe, it is characterized in that: described two electrodes are molybdenum electrode.
4. as claimed in claim 1 for the cathode electron gun of microfocus X-ray pipe, it is characterized in that: described six electrodes that are connected with described filament cap are the electrode that molybdenum maybe can cut down making.
5. as claimed in claim 1 for the cathode electron gun of microfocus X-ray pipe, it is characterized in that: described ceramic electrode and described electrode holder are adopted and be screwed.
6. as claimed in claim 1 for the cathode electron gun of microfocus X-ray pipe, it is characterized in that: described filament cap, described cathode shield or described electrode holder adopt 304 stainless steel materials to make.
7. as claimed in claim 1 for the cathode electron gun of microfocus X-ray pipe, it is characterized in that: described ceramic electrode adopts 95% aluminium oxide ceramics and carries out ceramic metallization processing.
8. as claimed in claim 1 for the cathode electron gun of microfocus X-ray pipe, it is characterized in that: described filament adopts pure tungsten to make.
9. according to claim 1 for the cathode electron gun of microfocus X-ray pipe, it is characterized in that: described six electrodes adopt 304 stainless steels to be connected location with described filament cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320751262.2U CN203553096U (en) | 2013-11-26 | 2013-11-26 | Cathode electron gun used for micro-focus X-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320751262.2U CN203553096U (en) | 2013-11-26 | 2013-11-26 | Cathode electron gun used for micro-focus X-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203553096U true CN203553096U (en) | 2014-04-16 |
Family
ID=50471177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320751262.2U Withdrawn - After Issue CN203553096U (en) | 2013-11-26 | 2013-11-26 | Cathode electron gun used for micro-focus X-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203553096U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103681181A (en) * | 2013-11-26 | 2014-03-26 | 无锡日联科技有限公司 | Cathode electron gun used for microfocus X ray tube |
| CN108615773A (en) * | 2018-05-17 | 2018-10-02 | 北京航天时代光电科技有限公司 | One kind being used for surface-pasted photodetector encapsulating shell |
-
2013
- 2013-11-26 CN CN201320751262.2U patent/CN203553096U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103681181A (en) * | 2013-11-26 | 2014-03-26 | 无锡日联科技有限公司 | Cathode electron gun used for microfocus X ray tube |
| CN103681181B (en) * | 2013-11-26 | 2016-04-06 | 无锡日联科技股份有限公司 | For the cathode electron gun of microfocus x ray tube |
| CN108615773A (en) * | 2018-05-17 | 2018-10-02 | 北京航天时代光电科技有限公司 | One kind being used for surface-pasted photodetector encapsulating shell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140416 Effective date of abandoning: 20160406 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |