CN220324404U - Glass bulb suitable for high-power - Google Patents
Glass bulb suitable for high-power Download PDFInfo
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- CN220324404U CN220324404U CN202321971360.7U CN202321971360U CN220324404U CN 220324404 U CN220324404 U CN 220324404U CN 202321971360 U CN202321971360 U CN 202321971360U CN 220324404 U CN220324404 U CN 220324404U
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Abstract
The utility model discloses a glass bulb tube suitable for high power, which comprises an anode, a cathode and a glass shell, wherein the bottom of the anode is provided with an anode sealing kovar, and the anode is arranged at the bottom of an inner cavity of the glass shell through the anode sealing kovar; the top of the cathode is provided with a cathode sealing kovar, and the cathode is arranged at the top of the inner cavity of the glass shell through the cathode sealing kovar, and is characterized in that: the anode sealing kovar and the cathode sealing kovar are welded with the glass shell through transition glass segments respectively, the transition glass segments and the glass shell are made of high borosilicate glass, and the thermal expansion coefficient of the transition glass segments is larger than that of the glass shell. The glass bulb tube can be applied to CT machines with larger power and faster rotating speed, and has good temperature resistance and light transmittance.
Description
Technical Field
The utility model relates to a bulb tube, in particular to a glass bulb tube suitable for high power.
Background
The CT machine is a disease detection instrument with complete functions, and is popularized and widely applied in the medical field with high resolution capability and visual and accurate diagnosis effect along with the development of technology. The CT bulb tube, also called X-ray tube, is a core component in CT machine for generating X-ray, and the technological perfection of CT bulb tube directly affects the working effect of CT machine. The X-ray tube mainly comprises an anode, a cathode and a glass shell, and the working principle is as follows: the electron beam emitted by the cathode is accelerated to form high-speed electron flow, and the high-speed electron flow bombards the target surface of the target disc of the anode to generate X rays. In order to ensure the vacuum environment required by the CT bulb tube during operation, the cathode and anode rotors of the CT bulb tube are required to be connected with the glass shell respectively, one end of a sealing kovar is connected with a bearing bushing in the rotor, the other end of the sealing kovar is connected with the glass shell, and in order to avoid the situation that the glass shell is easy to crack or crack at an interface due to temperature change, the glass shell is required to use glass materials with a thermal expansion coefficient similar to that of the sealing kovar, however, the thermal expansion coefficient of the glass shell is generally higher, the high temperature resistance and the light transmittance are poorer, the application to CT machines with higher power and higher rotating speed is difficult, and meanwhile, the radiation blocking effect is stronger, and the use effect is poor.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a glass bulb tube suitable for high power, which can be applied to CT machines with high power and high rotating speed and has good temperature resistance and light transmittance.
In order to solve the technical problems, the technical scheme adopted is as follows:
the glass bulb tube suitable for high power comprises an anode, a cathode and a glass shell, wherein an anode sealing kovar is arranged at the bottom of the anode, and the anode is arranged at the bottom of an inner cavity of the glass shell through the anode sealing kovar; the top of the cathode is provided with a cathode sealing kovar, and the cathode is arranged at the top of the inner cavity of the glass shell through the cathode sealing kovar, and is characterized in that: the anode sealing kovar and the cathode sealing kovar are welded with the glass shell through transition glass segments respectively, the transition glass segments and the glass shell are made of high borosilicate glass, and the thermal expansion coefficient of the transition glass segments is larger than that of the glass shell.
In the glass bulb, the whole glass shell is made of high borosilicate glass with a smaller thermal expansion coefficient, the high temperature resistance and the light transmittance are better, the working state which can bear higher temperature can be ensured even if the glass bulb is used in a high-power CT machine, and the radiation blocking is reduced; the anode sealing kovar and the cathode sealing kovar are connected with the glass shell through the transition glass segment, the transition connecting segment can adopt high borosilicate glass with the thermal expansion coefficient similar to that of the corresponding sealing kovar, so that the transition connecting segment is more tightly connected with the corresponding sealing kovar, meanwhile, the connection between the transition connecting segment and the glass shell is smoother, the light transmittance of the glass shell is not required to be reduced, and the glass bulb tube is enabled to be difficult to break when in operation even if the rotating speed of the glass bulb tube is higher, and the connection between the anode sealing kovar and the glass shell is still tight.
In a preferred embodiment, the anode sealing kovar and the cathode sealing kovar are both made of tungsten-based alloy. The tungsten-based alloy has high melting point, high density, high hardness, high strength, low vapor pressure, strong radiation resistance, high temperature resistance, impact resistance, wear resistance and corrosion resistance, good extensibility and mechanical processing performance, and can be used as a kovar for connecting an anode, a cathode and a glass bulb tube, and can be applied to the glass bulb tube with high power and high rotating speed requirements.
In a further preferred embodiment, the transition glass segment is made of high borosilicate 4.0 glass. The transition glass section is made of high-boron silicon 4.0 glass, has a thermal expansion coefficient similar to that of anode sealing kovar and cathode sealing kovar, and can effectively avoid the fact that the glass shell is easy to crack or break at the joint due to temperature change.
In a further preferred embodiment, the glass envelope is made of high borosilicate 3.3 glass. The high boron silicon 3.3 glass has the advantages of stronger temperature resistance and better light transmittance, can bear high temperature brought by high-power operation, and has smaller influence on ray penetration.
The method for connecting the sealing kovar with the glass shell can adopt a method disclosed by a metal and glass sealing process of a CT bulb tube, which is disclosed by publication No. CN109273335B and grant notice day No. 2020, 10 and 13, wherein a glass rod used in the process is made of high-boron silicon 4.0 glass, and the molten glass forms the transition glass segment after butt joint is completed.
The utility model has the beneficial effects that: the glass bulb tube can be applied to CT machines with larger power and faster rotating speed, and has good temperature resistance and light transmittance.
Drawings
FIG. 1 is a schematic view of a glass bulb according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a connection portion between a cathode sealing kovar and a transition glass segment according to an embodiment of the present utility model;
FIG. 3 is a schematic view of the structure of the joint between the anode sealing kovar and the transition glass segment in the embodiment of the utility model;
fig. 4 is a schematic structural diagram of cathode sealing kovar or anode sealing kovar in an embodiment of the utility model.
Detailed Description
The utility model is further described with reference to the drawings and the specific embodiments below:
the glass bulb tube suitable for high power comprises an anode 1, a cathode 2 and a glass shell 3, wherein an anode sealing kovar 101 is arranged at the bottom of the anode 1, and the anode 1 is arranged at the bottom of an inner cavity of the glass shell 3 through the anode sealing kovar 101; the top of the cathode 2 is provided with a cathode sealing kovar 201, the cathode 2 is arranged at the top of the inner cavity of the glass shell 3 through the cathode sealing kovar 201, the anode sealing kovar 101 and the cathode sealing kovar 201 are respectively welded with the glass shell 3 through a transition glass segment 4, the transition glass segment 4 and the glass shell 3 are both made of high borosilicate glass, and the thermal expansion coefficient of the transition glass segment 4 is larger than that of the glass shell 3.
In the glass bulb, the whole glass shell 3 is made of high borosilicate glass with smaller thermal expansion coefficient, the high temperature resistance and the light transmittance are better, the working state which can bear higher temperature can be ensured even if the glass bulb is used in a high-power CT machine, and the radiation blocking is reduced; the anode sealing kovar 101 and the cathode sealing kovar 201 are connected with the glass shell 3 through the transition glass section 4, and the transition connecting section can adopt high borosilicate glass with a thermal expansion coefficient similar to that of the corresponding sealing kovar, so that the transition connecting section and the corresponding sealing kovar are more compact, meanwhile, the connection between the transition connecting section and the glass shell 3 is smoother, the light transmittance of the glass shell 3 is not required to be reduced, and the connection between the anode sealing kovar 101 and the glass shell 3 is still compact and difficult to break even if the rotating speed of the glass bulb tube is higher during working.
Both anode sealing kovar 101 and cathode sealing kovar 201 are made of tungsten-based alloy. The tungsten-based alloy has high melting point, high density, high hardness, high strength, low vapor pressure, strong radiation resistance, high temperature resistance, impact resistance, wear resistance and corrosion resistance, and good extensibility and mechanical processing performance, and can be used as a kovar for connecting the anode 1 and the cathode 2 with a glass bulb tube, and can be applied to the glass bulb tube with higher requirements on high power and high rotating speed.
The transition glass segment 4 is made of high borosilicate 4.0 glass and the glass envelope 3 is made of high borosilicate 3.3 glass. The transition glass section 4 is made of high-boron silicon 4.0 glass, has a thermal expansion coefficient similar to that of the anode sealing kovar 101 and the cathode sealing kovar 201, and can effectively avoid the glass shell 3 from being easily cracked or broken at the joint due to temperature change; the high boron silicon 3.3 glass has the advantages of stronger temperature resistance and better light transmittance, can bear high temperature brought by high-power operation, and has smaller influence on ray penetration.
The method for connecting the sealing kovar with the glass shell 3 can adopt a method disclosed by a metal and glass sealing process of a CT bulb tube, which is disclosed by publication number CN109273335B and grant notice day 2020, 10 and 13, wherein a glass rod used in the process is made of high-boron silicon 4.0 glass, and the molten glass forms the transition glass section 4 after butt joint is completed.
Claims (4)
1. The glass bulb tube suitable for high power comprises an anode, a cathode and a glass shell, wherein an anode sealing kovar is arranged at the bottom of the anode, and the anode is arranged at the bottom of an inner cavity of the glass shell through the anode sealing kovar; the top of the cathode is provided with a cathode sealing kovar, and the cathode is arranged at the top of the inner cavity of the glass shell through the cathode sealing kovar, and is characterized in that: the anode sealing kovar and the cathode sealing kovar are welded with the glass shell through transition glass segments respectively, the transition glass segments and the glass shell are made of high borosilicate glass, and the thermal expansion coefficient of the transition glass segments is larger than that of the glass shell.
2. A glass bulb suitable for use in high power applications as claimed in claim 1, wherein: the anode sealing kovar and the cathode sealing kovar are both made of tungsten-based alloy.
3. A glass bulb suitable for use with high power applications as claimed in claim 2, wherein: the transition glass segment is made of high boron silicon 4.0 glass.
4. A glass bulb suitable for use in high power applications as claimed in claim 3, wherein: the glass housing is made of high borosilicate 3.3 glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321971360.7U CN220324404U (en) | 2023-07-26 | 2023-07-26 | Glass bulb suitable for high-power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321971360.7U CN220324404U (en) | 2023-07-26 | 2023-07-26 | Glass bulb suitable for high-power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220324404U true CN220324404U (en) | 2024-01-09 |
Family
ID=89415117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321971360.7U Active CN220324404U (en) | 2023-07-26 | 2023-07-26 | Glass bulb suitable for high-power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220324404U (en) |
-
2023
- 2023-07-26 CN CN202321971360.7U patent/CN220324404U/en active Active
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