CN115662863A - Partial pressure detection integrated X-ray tube device - Google Patents
Partial pressure detection integrated X-ray tube device Download PDFInfo
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- CN115662863A CN115662863A CN202211297774.6A CN202211297774A CN115662863A CN 115662863 A CN115662863 A CN 115662863A CN 202211297774 A CN202211297774 A CN 202211297774A CN 115662863 A CN115662863 A CN 115662863A
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Abstract
The application provides a voltage division detection integrated X-ray tube device, which comprises a vacuum shell element, anode assemblies, cathode assemblies and a resistance voltage division part, wherein the anode assemblies and the cathode assemblies are arranged at two ends of the vacuum shell element; the resistance voltage-dividing part is formed by connecting a main voltage-dividing part and a secondary voltage-dividing part in series and is connected between the two pole assemblies in parallel, wherein at least the main voltage-dividing part is a thin film resistor attached to the inner surface of the vacuum shell element. The technical scheme is characterized in that the voltage divider and the X-ray tube are combined to form a device, so that the technical problem that the limited precious space of instrument and equipment is occupied in a large amount is greatly solved, and meanwhile, the cost investment is reduced.
Description
Technical Field
The present patent application relates to an X-ray tube.
Background
The X-ray tube is the most core component in X-ray instruments, and in order to generate the required radiation, it is necessary to apply very high operating voltage, even up to 600KV, to the anode or cathode, and at the same time, it also has very high technical performance requirements for the insulation performance of the related control circuit, devices, etc. connected with the X-ray tube, which is accompanied by high technical input cost.
In order to control and ensure the working stability and reliability of the X-ray tube device, it is necessary to perform sampling detection monitoring on the working voltage of the loaded anode or the loaded cathode of the X-ray tube by a voltage dividing resistor. The voltage dividing resistor of the X-ray tube device is composed of a plurality of voltage dividing resistors connected in series and connected between the anode and the cathode of the X-ray tube, as shown in a circuit schematic diagram of fig. 1, a detection line is led out from the voltage dividing resistor at the tail end to obtain a reduced voltage, and then the total loading voltage of the anode or the grounded cathode loaded with the reverse working voltage is obtained through calculation. The existing voltage dividing resistor is an external device, and the resistor string of the external device is not only required to be subjected to insulation packaging of epoxy resin and the like, but also required to be electrically connected with the X-ray tube to ensure high-voltage insulation performance, so that the technical problems of large volume of the external device, requirement for occupying precious space in an instrument, high cost, high external connection technical requirement and reliability risk exist, and the technical requirements of miniaturization, low cost and high reliability in various application fields are difficult to meet.
Disclosure of Invention
The invention aims to provide a voltage division detection integrated X-ray tube device in order to realize miniaturization of the whole instrument and equipment, start from a voltage division resistor, change the constitution of an external device, simplify the composition of an X-ray generation system, reduce the volume of the device and reduce the cost investment.
The application provides a partial pressure detects integrated type X-ray tube device technical scheme, its main technical content is: a voltage division detection integrated X-ray tube device comprises a vacuum shell element, a resistor voltage division part and a voltage divider part, wherein the vacuum shell element is provided with two coaxial opposite ends, one end of the vacuum shell element is a cathode component, and the other end of the vacuum shell element is an anode component;
the resistance voltage dividing part is formed by connecting a main voltage dividing part and a secondary voltage dividing part in series and is connected between the two pole assemblies in parallel, voltage dividing nodes of the main voltage dividing part and the secondary voltage dividing part are connected with external detection leads, and at least the main voltage dividing part is a thin film resistor attached to the inner surface of the vacuum shell element;
the detection lead is hermetically led out from the vacuum shell element.
In one preferred embodiment of the above overall technical solution, the secondary voltage divider is an external unit resistor and is connected between the detection lead and the electrode assembly to which the detection lead is close.
One preferred embodiment of the above integral solution is a film resistor integrally deposited on the inner surface of the vacuum housing element.
In a preferred embodiment of the above integral solution, the thin film resistor is a constant-width film resistor spirally attached to the inner surface of the vacuum casing element.
In one preferred embodiment of the foregoing overall technical solution, the thin film resistor is a squirrel-cage resistive film, the squirrel-cage resistive film is a plurality of strip resistive films distributed at intervals and connected in parallel between the anode parallel end ring and the cathode parallel end ring, and the anode parallel end ring is a conductive end ring electrically connected to the anode assembly; and the cathode parallel end ring is a conductive end ring electrically connected with the cathode assembly, and a voltage division parallel ring which is connected with the strip resistive film in parallel is arranged at the voltage division node.
In one preferred embodiment of the above overall solution, the thin film resistor is a serpentine coiled resistive film.
One preferred item of the above overall technical solution further includes a correction compensation resistor, and the correction compensation resistor is externally connected in parallel to the secondary voltage dividing portion.
In one preferred embodiment of the above overall solution, the vacuum housing member is disc-shaped;
the squirrel-cage type resistive film is a plurality of strip resistive films which are radially distributed and attached to the inner surface of the disc of the vacuum shell element and are connected between the cathode parallel end ring and the anode parallel end ring in parallel.
In one preferred embodiment of the above integral solution, the vacuum housing member is disc-shaped;
the thin film resistor is formed by concentrically winding snake-shaped annular coils into a resistor film.
The application provides a partial pressure detects integrated type X-ray tube device technical scheme, the partial pressure resistor peripheral hardware constitution and configuration connection structure in the X ray generating device has thoroughly been changed, it is as an organic whole to make it merge into the X ray tube device, need not additionally to reserve the valuable equipment space for the partial pressure resistor, and simplified the whole constitution of X ray generation system greatly, system configuration cost has been reduced, and the vacuum property of X-ray tube device itself guarantees inside integrated resistance pressfitting working property and reliable insulating security performance.
Drawings
Fig. 1 is a schematic circuit diagram of an X-ray tube with a voltage dividing resistor connected externally.
Fig. 2 and 9 are schematic structural diagrams of two types of X-ray tube devices and a voltage dividing resistor unit according to the present application.
Fig. 3-8 and fig. 10 are respectively structural diagrams of various embodiments of the present patent application.
Detailed Description
The technical content of the partial pressure detection integrated X-ray tube device of the present patent application will be explained in detail below.
The partial pressure detection integrated X-ray tube device comprises a vacuum shell element 7, wherein two ends of the vacuum shell element 7 which are coaxially opposite are provided with a cathode component 11 at one end and an anode component 1 corresponding to the cathode component 11 at the other end. Under the action of a high-voltage electric field between the two electrode assemblies, electrons are separated from the cathode filament C and impact the anode target A of the anode assembly at high speed to generate X rays.
On the basic structure of the X-ray tube device main body, a resistance voltage dividing part is additionally arranged in the structure of the device.
The resistance voltage dividing part is connected between the anode assembly 1 and the cathode assembly 11 in parallel and is formed by connecting a main voltage dividing part R1 and a secondary voltage dividing part R2 in series, a voltage dividing node B of the main voltage dividing part R1 and the secondary voltage dividing part R2 is connected with a detection lead 8, a detection control circuit at an external instrument end obtains a voltage dividing value of the secondary voltage dividing part R2 through the detection lead 8, and the total working loading voltage between two electrodes of the X-ray tube can be calculated.
Fig. 9 shows an X-ray device operating in a bipolar power supply with a higher applied operating voltage. In the device, a resistance voltage dividing part is respectively connected between the anode A and the cathode C and the middle ground in parallel: a main voltage dividing part R1 and a sub voltage dividing part R2 on the anode a side, a main voltage dividing part R1 'and a sub voltage dividing part R2' on the cathode C side; the voltage division nodes B and B 'of the two groups of resistance voltage division parts are connected with the detection leads 8 and 8', and the middle node of the two groups of resistance voltage division parts is a grounding point D.
Wherein, at least the main voltage-dividing part R1 is a thin film resistor adhered on the inner surface of the vacuum shell element 10; the partial pressure nodes B and B 'of the main partial pressure parts R1 and R1' and the secondary partial pressure parts R2 and R2 'are hermetically led out by a vacuum shell element 7 at corresponding positions and are connected with externally connected detection lead wires 8 and 8'; for the X-ray tube device of the bipolar power supply, the middle joint of the two groups of resistance voltage division parts is a grounding point D, and the corresponding position is hermetically led out by the vacuum shell element 7 and is externally connected with a middle ground.
The sub voltage dividing portion R2 may be a thin film resistor attached to the inner surface of the vacuum casing element 10, as well as the main voltage dividing portion R1, or may be an external resistor unit between the voltage dividing node B and the ground electrode assembly.
The vacuum housing element 10 may be a vitreous component, most preferably a ceramic component.
The thin film resistor can have various implementation structures.
In the structure of the embodiment shown in fig. 8, the film resistor is uniformly deposited on the inner surface of the vacuum enclosure element 10 as a whole, the conductive rings 21, 22, and 23 are respectively disposed at the end portions of the two pole assemblies and the partial pressure node B, wherein the conductive rings 21 and 22 at the two ends are extended from the metalized thin film electrical contact 4 to be short-circuited to the metal kovar 3 of the pole assembly, so as to achieve electrical connection with the anode assembly 1 and the cathode assembly 11; the metallized film electric contact 4 on the conducting ring 23 of the voltage dividing node B is in short circuit with the inner end of the detection lead 8 which is hermetically led out of the vacuum shell element 7.
Another embodiment of the thin film resistor is shown in fig. 3 or fig. 5, and is an equal-width thin film resistor spirally attached to the inner surface of the vacuum housing element 7. Fig. 3 shows a perspective configuration of an X-ray tube device with a grounded cathode and a high voltage applied to the anode, and fig. 5 shows a perspective configuration of an X-ray tube device with a grounded anode and a negative high voltage applied to the cathode. As shown in the figure, the spiral film resistor is an integral voltage-dividing resistor, and both ends and a voltage-dividing node B of the integral voltage-dividing resistor are respectively and electrically connected with Kovar 3 at two poles and the sealed leading-out inner ends of a vacuum shell element 7 of a detection lead 8 through a metalized film electric contact 4.
Fig. 4 shows a perspective construction of an X-ray tube device in which the vacuum housing element 7 is in the form of a disc. In this embodiment, the thin film resistor is an equal-width thin film resistor which is connected between the two electrodes and spirally attached to the inner surface of the vacuum housing element 7 from inside to outside, the outer end of the thin film resistor, i.e., the outer end of the main voltage division portion R1, is electrically connected to the anode through the metalized thin film electrical contact 4 via the anode kovar 3 and the metal spherical connecting member 14, the inner end of the thin film resistor, i.e., the cathode connecting end of the sub voltage division portion R, is electrically connected to the external pin 12 of the cathode assembly 11 through the metalized thin film electrical contact 4, and the voltage division node B is also electrically connected to the detection lead 8 which is hermetically led out of the vacuum housing element 7 through the metalized thin film electrical contact 4.
Still another embodiment of the thin film resistor is a squirrel cage type resistor film attached to the inner surface of the tubular vacuum housing element 10 in a squirrel cage manner. As shown in fig. 7, the squirrel-cage resistive film is a plurality of strip resistive films 24 which are connected in parallel between the anode parallel end ring 21 and the cathode parallel end ring 22 and are distributed at intervals, and the strip resistive films 24 can be arranged at equal intervals or at unequal intervals. The anode parallel end ring 21 of the resistance film is a conductive end ring which is electrically connected with the anode assembly 1, and can be led out to be electrically connected with the kovar 3 of the anode through a metallized film electric contact 4; the cathode parallel end ring 22 of the resistance film is a conductive end ring which is electrically connected with the cathode assembly 11 and can be led out to be electrically connected with the Kovar 3 of the cathode through a metalized film electric contact 4; a voltage dividing parallel ring 23 for connecting all the strip resistive films 24 in parallel is arranged at the voltage dividing node B of the resistive film, and the voltage dividing parallel ring 23 is electrically connected with the inner end of the detection lead 8 hermetically led out of the vacuum shell element 7.
For the X-ray tube device with the structure of the disc-shaped vacuum shell element 7, the squirrel-cage type resistance film is a plurality of strip resistance films which are attached to the inner surface of the disc of the vacuum shell element 7 and radially distributed, is connected between the cathode parallel end ring 22 inside and the anode parallel end ring 21 outside in parallel, and is electrically connected with the two poles and the detection lead 8 in the same way.
Fig. 6 shows another thin film resistor implementation. As shown in the figure, the round tube shaped vacuum shell element 7 is divided and spread by a virtual longitudinal dividing line N-N, the inner surface is attached with resistance films coiled in a snake shape transversely, the current between the adjacent resistance films is opposite to each other, so as to eliminate the side effect of the electromagnetic induction of the thin film resistance and the interference of the induced current. The resistance film structure wound in a serpentine shape can also be applied to an X-ray tube device having a disc-shaped vacuum housing element 7 structure, i.e. the resistance film is wound in a serpentine shape concentrically from inside to outside.
In order to facilitate the accuracy or resistance value correction control adjustment of the voltage division resistor part by the outside, the X-ray tube device is externally connected with a correction compensation resistor R3, as shown in fig. 3, 4, 6, 7 and 8, wherein the correction compensation resistor R3 is connected in parallel with the voltage division part R2.
The structure of the above embodiment is also applicable to an X-ray tube device operating with a bipolar power supply as shown in fig. 9. Fig. 10 shows a device implementation structure of equal-width film resistance spirally attached to the inner surface of the vacuum housing element 7. The spiral type membrane resistor is an integral divider resistor, both ends of the spiral type membrane resistor are connected in parallel to the Kovar 3 of two poles through a metalized thin film electric contact 4, the middle point of the spiral type membrane resistor is a middle grounding point D of two groups of resistor voltage-dividing parts and is externally connected with a middle ground, the membrane resistor between the middle grounding point D and the anode assembly 1 is an anode side resistor voltage-dividing part, and a voltage-dividing node B of a main voltage-dividing part R1 and a secondary voltage-dividing part R2 of the spiral type membrane resistor is hermetically led out by a vacuum shell element 7 and is connected with a detection lead 8; the membrane resistance between the middle grounding point D and the cathode component 11 is an anode side resistance voltage dividing part, and the voltage dividing node B 'of the main voltage dividing part R1' and the secondary voltage dividing part R2 'is hermetically led out from the vacuum shell element 7 and is connected with a detection lead 8'.
Claims (10)
1. The voltage division detection integrated X-ray tube device comprises a vacuum shell element (7), wherein two ends of the vacuum shell element (7) are coaxially opposite, one end of the vacuum shell element is a cathode component (11), and the other end of the vacuum shell element is an anode component (1), and the device is characterized by further comprising a resistance voltage division part;
the resistance voltage dividing part is formed by connecting a main voltage dividing part (R1) and a secondary voltage dividing part (R2) in series and is connected between the two pole assemblies in parallel, a voltage dividing node (B) of the main voltage dividing part (R1) and the secondary voltage dividing part (R2) is connected with an external detection lead (8), wherein at least the main voltage dividing part (R1) is a thin film resistor attached to the inner surface of the vacuum shell element;
and the detection lead (8) is hermetically led out from the vacuum shell element.
2. The voltage division detection integrated X-ray device according to claim 1, wherein the X-ray device is an X-ray device operating under a bipolar power supply, and a resistance voltage division part is connected in parallel between the anode assembly (1) and the cathode assembly (11) and an intermediate ground: a primary voltage divider (R1) and a secondary voltage divider (R2) on the anode side, and a primary voltage divider (R1 ') and a secondary voltage divider (R2') on the cathode side; the voltage dividing nodes (B, B ') of the two groups of resistance voltage dividing parts are respectively connected with detection leads (8, 8') outwards, and the middle ground between the two groups of resistance voltage dividing parts is an external grounding point (D).
3. The voltage division detection integrated X-ray tube device according to claim 1 or 2, wherein the secondary voltage division portion is an external resistor unit connected between the detection lead and the electrode assembly adjacent to the detection lead.
4. The divided voltage detection integrated X-ray tube device according to claim 1, wherein the thin film resistor is a film resistor integrally deposited on an inner surface of the vacuum casing member.
5. The divided voltage detection integrated X-ray tube device according to claim 1, wherein the thin film resistor is an equal width thin film resistor spirally attached to an inner surface of the vacuum casing member.
6. The voltage-dividing detection integrated X-ray tube device according to claim 1, wherein the thin film resistor is a squirrel-cage resistive film, the squirrel-cage resistive film is a plurality of strip resistive films (24) which are distributed at intervals and connected in parallel between the anode parallel end ring (21) and the cathode parallel end ring (22), and the anode parallel end ring (21) is an electrically conductive end ring electrically connected with the anode assembly; and the cathode parallel end ring (22) is an electric conduction end ring electrically connected with the cathode assembly, and a voltage division parallel ring (23) for connecting the strip resistive film in parallel is arranged at the voltage division node (B).
7. The divided voltage detection integrated X-ray tube device according to claim 1, wherein the thin film resistor is a serpentine coiled resistive film.
8. The voltage-dividing detection integrated X-ray tube device according to claim 1, further comprising a correction compensation resistor (R3) externally connected in parallel to the sub-voltage-dividing portion (R2).
9. The partial pressure detection integrated X-ray tube device according to claim 6, wherein the vacuum casing member has a disk shape;
the squirrel-cage resistance film is a plurality of strip resistance films (24) which are radially distributed and are attached to the inner surface of the disc of the vacuum shell element and are connected between the inner cathode parallel end ring and the outer anode parallel end ring in parallel.
10. The partial pressure detection integrated X-ray tube device according to claim 7, wherein the vacuum casing member has a disk shape;
the thin film resistor is a concentric snake-shaped annular coiled resistance film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211297774.6A CN115662863A (en) | 2022-10-22 | 2022-10-22 | Partial pressure detection integrated X-ray tube device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211297774.6A CN115662863A (en) | 2022-10-22 | 2022-10-22 | Partial pressure detection integrated X-ray tube device |
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| Publication Number | Publication Date |
|---|---|
| CN115662863A true CN115662863A (en) | 2023-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211297774.6A Pending CN115662863A (en) | 2022-10-22 | 2022-10-22 | Partial pressure detection integrated X-ray tube device |
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| Country | Link |
|---|---|
| CN (1) | CN115662863A (en) |
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2022
- 2022-10-22 CN CN202211297774.6A patent/CN115662863A/en active Pending
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