CN212032984U - Cathode adjusting mechanism of X-ray tube - Google Patents
Cathode adjusting mechanism of X-ray tube Download PDFInfo
- Publication number
- CN212032984U CN212032984U CN202021114772.5U CN202021114772U CN212032984U CN 212032984 U CN212032984 U CN 212032984U CN 202021114772 U CN202021114772 U CN 202021114772U CN 212032984 U CN212032984 U CN 212032984U
- Authority
- CN
- China
- Prior art keywords
- cathode
- adjusting screw
- ray tube
- flange
- focusing electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- X-Ray Techniques (AREA)
Abstract
The utility model discloses an X-ray tube cathode adjusting mechanism, which comprises an upper porcelain tube and a lower porcelain tube, wherein the lower end of the lower porcelain tube is provided with an anode component, a grid component is arranged between the upper porcelain tube and the lower porcelain tube, the upper end of the upper porcelain tube is provided with a cathode flange, a cold cathode component and a focusing electrode are arranged in the upper porcelain tube, and the upper end of the focusing electrode is fixed on the cathode flange; the cold cathode assembly is arranged in the focusing electrode and comprises a cathode, a cathode seat, an adjusting screw and a telescopic support, the cathode is arranged on the lower side surface of the cathode seat, and one end of a screw rod of the adjusting screw penetrates through the center of the cathode flange and then is connected to the upper side surface of the cathode seat; the telescopic support is sleeved outside the adjusting screw, and the upper end and the lower end of the telescopic support are respectively and fixedly connected with the cathode flange and the cathode base. The utility model discloses can adjust the axial position of negative pole, both can add high voltage between focus utmost point and grid and carry out purification treatment, promote the use reliability of ray tube, the unable cathodic current that draws of this high voltage simultaneously, whole purification process need not to take safeguard procedures.
Description
Technical Field
The utility model belongs to the technical field of the X-ray tube, specific saying so relates to an X-ray tube cathode adjusting mechanism.
Background
The X-ray tube is a vacuum electronic device which utilizes high-speed electrons to impact a metal target surface to generate X-rays and comprises two electrodes, wherein one electrode is a cathode used for emitting electrons, the other electrode is a target used for receiving electron bombardment and is used as an anode, the two electrodes are sealed in a high-vacuum glass or ceramic shell, a grid is arranged between the cathode and the anode, and the cathode is arranged in a focusing electrode.
After the X-ray tube is manufactured and assembled, a high voltage greater than the normal operating voltage of the X-ray tube is generally applied between the grid electrode and the focusing electrode before operation to remove burrs on the surfaces of the grid electrode and the focusing electrode due to machining. However, in the conventional X-ray tube, after the production and assembly are completed, the cathode is directly installed in place, so that the distance between the cathode and the focusing electrode is relatively short, when a high voltage for deburring is applied between the grid and the focusing electrode, a current is easily formed between the grid and the cathode by an electric field generated by the high voltage, the current under the high voltage not only generates radiation and causes pollution to human bodies and the environment, but also consumes energy and wastes electricity resources due to the generation of the current.
Disclosure of Invention
In order to overcome the defects, the utility model provides an X-ray tube cathode regulating mechanism can adjust the negative pole, when avoiding getting rid of the burr on grid and focus utmost point surface, and the production current when increasing voltage between grid and the focus utmost point causes the radiation to the environment, can consume the energy when producing the electric current moreover, causes the waste.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: an X-ray tube cathode adjusting mechanism comprises an upper ceramic tube and a lower ceramic tube, wherein an anode assembly is arranged at the lower end of the lower ceramic tube, a grid assembly is arranged between the upper ceramic tube and the lower ceramic tube, a cathode flange is arranged at the upper end of the upper ceramic tube, a cold cathode assembly and a focusing electrode are arranged in the upper ceramic tube, the focusing electrode is cylindrical, and the upper end of the focusing electrode is fixed on the cathode flange; the cold cathode assembly is arranged in the focusing electrode and comprises a cathode, a cathode seat, an adjusting screw and a telescopic support, the cathode is arranged on the lower side surface of the cathode seat, one end of a screw rod of the adjusting screw penetrates through the center of the cathode flange and then is connected to the upper side surface of the cathode seat, the adjusting screw is in threaded connection with the cathode flange, and the tail end of the screw rod of the adjusting screw abuts against the upper side surface of the cathode seat; the telescopic bracket is sleeved outside the adjusting screw, and the upper end and the lower end of the telescopic bracket are respectively fixedly connected with the cathode flange and the cathode base.
As a further improvement of the present invention, the middle portion of the telescopic bracket is bent toward the direction close to the axis of the adjusting screw, and the upper end and the lower end of the telescopic bracket form two opposite horn-shaped openings.
As a further improvement of the utility model, the telescopic bracket is made of a metal material with ductility.
As a further improvement of the utility model, the telescopic bracket is made of oxygen-free copper.
As a further improvement of the utility model, the anode component comprises an anode and a target material.
As a further improvement of the utility model, be equipped with spacing recess on the side of going up of negative pole seat, adjusting screw's screw rod end is inserted and is arranged in this spacing recess.
As a further improvement, the cathode base is provided with an annular boss, the inside of the cylinder body of the focusing electrode is provided with a limit boss, the lower side surface of the annular boss is clamped on the upper side surface of the limit boss, and the cathode is in a normal working state.
The utility model has the advantages that: the cathode adjusting mechanism of the X-ray tube can adjust the axial position of a cathode by utilizing an axial telescopic mechanism consisting of an adjusting screw and a telescopic bracket, and before normal use, high voltage is applied between a focusing electrode and a grid electrode for purification treatment, so that the working reliability of the X-ray tube can be improved.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention in an initial state;
fig. 3 is a schematic view of the cross-sectional structure of the present invention in an operating state.
The following description is made with reference to the accompanying drawings:
11-upper porcelain tube; 12-lower porcelain tube;
2-an anode assembly; 3-a gate assembly;
4-cathode flange; 5-a focusing electrode;
6-cathode; 7-cathode base;
8-adjusting screw; 9-a telescopic bracket;
21-an anode; 22-target material;
51-limit boss; 71-annular boss.
Detailed Description
The following description of the preferred embodiments of the present invention will be made in conjunction with the accompanying drawings.
Referring to fig. 1-3, for an X-ray tube cathode adjusting mechanism, including last ceramic cylinder 11 and lower ceramic cylinder 12, the lower extreme of lower ceramic cylinder 12 is equipped with anode assembly 2, go up ceramic cylinder 11 and be equipped with grid subassembly 3 down between the ceramic cylinder 12, the upper end of going up ceramic cylinder 11 is equipped with cathode flange 4, upward be equipped with cold cathode subassembly and focus utmost point 5 in the ceramic cylinder 11. The focusing electrode 5 is cylindrical, and the upper end of the focusing electrode 5 is fixed on the cathode flange 4; the cold cathode assembly is arranged in the focusing electrode 5 and comprises a cathode 6, a cathode base 7, an adjusting screw 8 and a telescopic support 9, the cathode 6 is arranged on the lower side surface of the cathode base 7, one end of a screw rod of the adjusting screw 8 penetrates through the center of the cathode flange 4 and then is connected to the upper side surface of the cathode base 7, the adjusting screw 8 is in threaded connection with the cathode flange 4, and the tail end of the screw rod of the adjusting screw 8 is tightly propped against the upper side surface of the cathode base 7; the telescopic support 9 is sleeved outside the adjusting screw 8, and the upper end and the lower end of the telescopic support 9 are respectively and fixedly connected with the cathode flange 4 and the cathode base 7.
The middle part of the telescopic support is bent towards the direction close to the axis of the adjusting screw, and two opposite horn-shaped openings are formed at the upper end and the lower end of the telescopic support; the telescopic bracket is made of a metal material with ductility, such as oxygen-free copper; the anode assembly 2 comprises an anode 21 and a target 22; a limiting groove is formed in the upper side face of the cathode base 7, and the tail end of a screw rod of the adjusting screw 8 is inserted into the limiting groove; be equipped with annular boss 71 on the negative pole seat, the barrel inside of focusing pole 5 is equipped with spacing boss 51, works as the downside block of annular boss 71 is in when spacing boss 51 goes up the side, but negative pole 6 is in normal operating condition.
When the cathode adjusting mechanism of the X-ray tube is in an initial state after being installed, the cathode 6 is in a non-working position and is positioned inside the cylinder of the focusing electrode 5, namely, one end of the nut of the adjusting screw 8 is arranged at the outer side of the cathode flange 4 for a certain distance, and meanwhile, the telescopic bracket 9 is in a compressed state. At this time, a high voltage is applied between the grid assembly 3 and the focusing electrode 5, and the cathode 6 is still in the cylinder of the focusing electrode 5 and is far away from the grid, so that the electric field generated by the high voltage between the grid and the focusing electrode 5 can not draw current, radiation damage environment can not be generated, and burrs generated on the surfaces of the focusing electrode 5 and the grid due to processing can be removed.
After burrs processed on the surfaces of the focusing electrode 5 and the grid electrode are removed, the adjusting screw 8 is rotated to push the cathode base 7 to move along the inner part of the cylinder body of the focusing electrode 5 until the cathode 6 is installed in place, and meanwhile, the telescopic bracket 9 is driven to be in an extending state. In order to facilitate the judgment of whether the cathode is in the working position, an annular boss 71 is provided on the cathode base 7, and when the lower side surface of the annular boss is just clamped on the upper side surface of the limiting boss 51 provided inside the cylinder of the focusing electrode 5, referring to fig. 3, the cathode 6 is installed in place, and thereafter the X-ray tube can be operated normally. For the convenience of installation, the lower end of the telescopic bracket 9 is fixed on the annular boss 71 of the cathode base 7.
Therefore, the cathode adjusting mechanism of the X-ray tube can adjust the axial position of the cathode by using the axial telescopic mechanism consisting of the adjusting screw and the telescopic bracket, high voltage is applied between the focusing electrode and the grid electrode for purification before normal use, the use reliability of the X-ray tube can be improved, and meanwhile, due to the shielding effect of the focusing electrode, cathode current cannot be pulled out by the high voltage, and X-rays cannot be generated naturally, so that the whole purification process of the focusing electrode does not need to take protective measures.
In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the invention. The foregoing description is only illustrative of the preferred embodiments of the invention, which can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. All the contents that do not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention all still belong to the protection scope of the technical solution of the present invention.
Claims (7)
1. The utility model provides an X-ray tube cathode adjusting mechanism, includes ceramic tube (11) and lower ceramic tube (12), the lower extreme of lower ceramic tube (12) is equipped with anode assembly (2), go up ceramic tube (11) and be equipped with grid subassembly (3) down between ceramic tube (12), the upper end of going up ceramic tube (11) is equipped with cathode flange (4), upward be equipped with cold cathode subassembly and focus utmost point (5) in ceramic tube (11), its characterized in that: the focusing electrode (5) is cylindrical, and the upper end of the focusing electrode (5) is fixed on the cathode flange (4); the cold cathode assembly is arranged in the focusing electrode (5), the cold cathode assembly comprises a cathode (6), a cathode base (7), an adjusting screw (8) and a telescopic support (9), the cathode (6) is arranged on the lower side surface of the cathode base (7), one end of a screw rod of the adjusting screw (8) penetrates through the center of the cathode flange (4) and then is connected to the upper side surface of the cathode base (7), the adjusting screw (8) is in threaded connection with the cathode flange (4), and the tail end of the screw rod of the adjusting screw (8) abuts against the upper side surface of the cathode base (7); the telescopic support (9) is sleeved outside the adjusting screw (8), and the upper end and the lower end of the telescopic support (9) are respectively and fixedly connected with the cathode flange (4) and the cathode base (7).
2. The X-ray tube cathode adjustment mechanism of claim 1, wherein: the middle part of the telescopic support is bent towards the direction close to the axis of the adjusting screw, and two opposite horn-shaped openings are formed at the upper end and the lower end of the telescopic support.
3. The X-ray tube cathode adjustment mechanism of claim 2, wherein: the telescopic bracket is made of a metal material with ductility.
4. The X-ray tube cathode adjustment mechanism of claim 3, wherein: the telescopic bracket is made of oxygen-free copper.
5. The X-ray tube cathode adjustment mechanism of claim 1, wherein: the anode assembly (2) comprises an anode (21) and a target (22).
6. The X-ray tube cathode adjustment mechanism of claim 1, wherein: the cathode base is characterized in that a limiting groove is formed in the upper side face of the cathode base (7), and the tail end of a screw rod of the adjusting screw (8) is inserted into the limiting groove.
7. The X-ray tube cathode adjustment mechanism of claim 1, wherein: be equipped with annular boss (71) on the negative pole seat, the barrel inside of focusing utmost point (5) is equipped with spacing boss (51), works as the downside block of annular boss (71) is in when the last side of spacing boss (51), negative pole (6) are in but normal operating condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021114772.5U CN212032984U (en) | 2020-06-16 | 2020-06-16 | Cathode adjusting mechanism of X-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021114772.5U CN212032984U (en) | 2020-06-16 | 2020-06-16 | Cathode adjusting mechanism of X-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212032984U true CN212032984U (en) | 2020-11-27 |
Family
ID=73477277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021114772.5U Active CN212032984U (en) | 2020-06-16 | 2020-06-16 | Cathode adjusting mechanism of X-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212032984U (en) |
-
2020
- 2020-06-16 CN CN202021114772.5U patent/CN212032984U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2438212B1 (en) | X-ray tube with a backscattered electron shielded anode | |
| CN102522298A (en) | Oval sheet beam electron gun | |
| CN212032984U (en) | Cathode adjusting mechanism of X-ray tube | |
| CN110942967B (en) | X-ray tube | |
| CN102097266B (en) | X-ray pinch diode composite cathode and design method thereof | |
| CN206685345U (en) | A kind of titanium window construction X-ray tube | |
| CN209747446U (en) | X-ray tube with lead protection device | |
| CN110289119B (en) | Proliferation type high-voltage nuclear battery | |
| CN216671551U (en) | X-ray tube and X-ray generator | |
| CN210403228U (en) | Proliferation type high-voltage nuclear battery | |
| CN210136837U (en) | Large-angle beryllium window output X-ray tube anode structure and X-ray tube | |
| CN211182147U (en) | Transmission type microfocus X-ray tube | |
| CN103681181B (en) | For the cathode electron gun of microfocus x ray tube | |
| CN211788907U (en) | Tungsten copper anode X-ray tube | |
| CN2746516Y (en) | Firmed environmental protection fixed anode X-ray tube | |
| CN212062371U (en) | Adjustable cold cathode X-ray tube | |
| CN203553096U (en) | Cathode electron gun used for micro-focus X-ray tube | |
| CN212517111U (en) | Shielding fairing for a ray tube | |
| CN208336144U (en) | A kind of x-ray source radiation protection component for metal ceramic tube | |
| CN210668260U (en) | X-ray tube with large emission angle | |
| CN106847651A (en) | A kind of Electronic Control aperture plate and preparation method based on molybdenum base bottom | |
| CN212542344U (en) | Cathode assembly for circumferential irradiation ray tube | |
| CN104916513A (en) | Micro-focus X-ray tube | |
| CN221841793U (en) | Anode disc structure of X-ray tube and X-ray tube | |
| CN211265407U (en) | X-ray tube capable of preventing x-ray leakage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |