X-ray source insulation protection improved structure

Abstract

The utility model belongs to the technical field of X-ray sources, and discloses an X-ray source insulation protection improved structure, an X-ray source comprises a ray tube, a voltage-multiplying module and a sealing cylinder, an anode electrically connected with the voltage-multiplying module is arranged on the ray tube, the sealing cylinder is sleeved outside the anode, two ends of the sealing cylinder are respectively and fixedly connected with the ray tube and the voltage-multiplying module, and the X-ray source insulation protection improved structure is arranged on the sealing cylinder. A glass shell is arranged outside the anode, a first end of the glass shell is in Kovar transition connection with a tube shell of the ray tube through a tube shell end, a second end of the glass shell is in Kovar transition connection with the anode through an anode end, an annular boss extending into the sealed space is arranged on the voltage-multiplying module, and the annular boss extends between the sealed cylinder and the anode end Kovar. And gaps are reserved between the annular boss and the sealing cylinder and between the annular boss and the anode end kovar. According to the X-ray source insulation protection improved structure, the insulation capacity between the sealing cylinder and the anode end kovar is enhanced through the annular boss, and the problem that the joint of the glass shell and the anode end kovar is prone to being broken down by high voltage is solved.

Description

Technical Field

[0001] This utility model relates to the field of X-ray source technology, and in particular to an improved structure for insulation protection of X-ray sources. Background Technology

[0002] Existing X-ray sources mainly consist of an X-ray tube, a voltage multiplier module, and a sealing cylinder. The X-ray tube has an anode electrically connected to the voltage multiplier module. The sealing cylinder is fitted over the anode, and its two ends are fixedly connected to the X-ray tube and the voltage multiplier module respectively, forming a sealed space filled with insulating oil. The voltage multiplier module in an X-ray source primarily converts the input low-voltage signal into a higher output voltage to meet the high voltage requirements of the X-ray source.

[0003] In an X-ray tube, a glass shell is mounted on the anode. This glass shell maintains a high vacuum environment inside the tube, enabling electron acceleration. The tube shell and the glass shell are connected via a Kovar connection at the tube shell end, and the anode and the glass shell are connected via a Kovar connection at the anode end. While the Kovar connection at the tube shell end is equipotentially connected to the sealing cylinder through the tube shell, due to the insulating properties of the glass shell, the Kovar connection at the anode end is not at the same potential as the sealing cylinder. This makes the junction between the glass shell and the Kovar connection at the anode end highly susceptible to high-voltage breakdown, affecting the lifespan of the X-ray source. Therefore, effective insulation protection is necessary at this junction. Utility Model Content

[0004] Based on the above problems, the purpose of this utility model is to provide an improved insulation protection structure for X-ray sources, which improves the insulation performance at locations that are easily broken down by high voltage, ensures reliable operation of the X-ray source, and extends its service life.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An improved insulation protection structure for an X-ray source is disclosed. The X-ray source includes an X-ray tube, a voltage multiplier module, and a sealing cylinder. An anode electrically connected to the voltage multiplier module is provided on the X-ray tube. The sealing cylinder is sleeved outside the anode, and its two ends are fixedly connected to the X-ray tube and the voltage multiplier module, respectively, thereby forming a sealed space outside the anode. The sealed space is filled with insulating oil. A glass shell is provided outside the anode. The first end of the glass shell is connected to the shell of the X-ray tube through a Kovar transition at the shell end, and the second end of the glass shell is connected to the anode through a Kovar transition at the anode end. The voltage multiplier module is provided with an annular boss extending into the sealed space. The annular boss extends between the sealing cylinder and the Kovar end of the anode, and gaps are left between the annular boss and the sealing cylinder, and between the annular boss and the Kovar end of the anode. The insulation coefficient of the material of the annular boss is higher than that of the insulating oil.

[0007] As an optional solution, the voltage multiplier module includes an epoxy resin block. The annular boss and the epoxy resin block are integrally formed by solid potting process. The epoxy resin block encapsulates a high-voltage circuit board and a feedback circuit board. The anode is connected to the high-voltage circuit board and the feedback circuit board through wires. The high-voltage circuit board is used to provide high-voltage electricity to the anode, and the feedback circuit board is used to ensure the output quality and stability of the high-voltage electricity.

[0008] As an alternative, one end of the sealing cylinder is fixed to the shell of the X-ray tube via a flange, and the other end of the sealing cylinder is bonded to an epoxy resin block.

[0009] As an alternative, the distance from the junction of the anode Kovar and the glass shell to the surface of the voltage multiplier module is half the height of the annular boss.

[0010] As an alternative, the anode Kovar is located inside the port at the second end of the glass shell, and the junction between the anode Kovar and the glass shell is located inside the glass shell.

[0011] As an alternative, the X-ray tube shell is made of stainless steel, with one end of the shell (Kovar) welded to the X-ray tube shell and the other end (Kovar) sintered and fixed to the glass shell.

[0012] As an alternative, the anode is made of copper, with one end of the anode tip (Kova) welded to the anode and the other end of the anode tip (Kova) sintered and fixed to the glass shell.

[0013] The beneficial effects of this utility model are as follows: The improved insulation protection structure for the X-ray source adds an annular boss to the existing voltage multiplier module. The annular boss extends between the sealing cylinder and the Kovar anode end to enhance the insulation capacity between the sealing cylinder and the Kovar anode end, thereby solving the problem that the joint between the glass shell and the Kovar anode end is easily broken down by high voltage. The modification cost is low, the insulation protection effect is significantly improved, the reliability of the X-ray source operation is improved, and the service life is extended. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the improved X-ray source insulation protection structure provided in this embodiment of the utility model.

[0015] In the attached image:

[0016] 1. X-ray tube; 11. Anode; 12. Glass shell;

[0017] 2. Voltage multiplier module; 21. Epoxy resin block; 211. Annular boss; 22. High voltage circuit board; 23. Feedback circuit board;

[0018] 3. Sealing cylinder; 31. Sealed space;

[0019] 4. Kovar at the shell end;

[0020] 5. Extreme yang can be destroyed. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0025] Please see Figure 1As shown, this preferred embodiment provides an improved structure for insulation protection of an X-ray source. The X-ray source includes a ray tube 1, a voltage multiplier module 2, and a sealing cylinder 3. An anode 11 electrically connected to the voltage multiplier module 2 is provided on the ray tube 1. The sealing cylinder 3 is sleeved outside the anode 11, and both ends of the sealing cylinder 3 are fixedly connected to the tube shell of the ray tube 1 and the voltage multiplier module 2, respectively, thereby forming a sealed space 31 outside the anode 11. The sealed space 31 is filled with insulating oil. A glass shell 12 is provided outside the anode 11. The first end of the glass shell 12 is transitionally connected to the tube shell of the ray tube 1 through a tube shell end Kovar 4, and the second end of the glass shell 12 is transitionally connected to the anode 11 through an anode end Kovar 5.

[0026] Specifically, the voltage multiplier module 2 is provided with an annular boss 211 extending into the sealed space 31. The annular boss 211 extends between the sealing cylinder 3 and the anode Kovar 5, and gaps are left between the annular boss 211 and the sealing cylinder 3, and between the annular boss 211 and the anode Kovar 5. The insulation coefficient of the material of the annular boss 211 is higher than that of the insulating oil.

[0027] Therefore, an annular boss 211 is added to the existing voltage multiplier module 2. The annular boss 211 extends between the sealing cylinder 3 and the anode Kovar 5 to enhance the insulation between the sealing cylinder 3 and the anode Kovar 5. This solves the problem that the joint between the glass shell 12 and the anode Kovar 5 is easily broken down by high voltage. The modification cost is low, the insulation protection effect is significantly improved, the reliability of the X-ray source is improved, and the service life is extended.

[0028] Specifically, the voltage multiplier module 2 includes an epoxy resin block 21. The annular boss 211 and the epoxy resin block 21 are integrally formed by solid potting process. The insulation coefficient of epoxy resin is higher than that of insulating oil. The epoxy resin block 21 encapsulates a high-voltage circuit board 22 and a feedback circuit board 23. The anode 11 is connected to the high-voltage circuit board 22 and the feedback circuit board 23 through wires. The high-voltage circuit board 22 is used to provide high voltage to the anode 11, and the feedback circuit board 23 is used to ensure the output quality and stability of the high voltage.

[0029] Specifically, the solid potting process involves thoroughly mixing liquid epoxy resin A and B and injecting the mixture into a potting mold containing internal components such as circuit boards. Then, appropriate temperature and pressure are applied to allow it to cure. Finally, the potting mold is removed to obtain an integrated pressure multiplier module 2.

[0030] Optionally, one end of the sealing cylinder 3 is fixed to the shell of the ray tube 1 via a flange, and the other end of the sealing cylinder 3 is glued to the epoxy resin block 21.

[0031] Optionally, the distance from the junction of the anode Kovar 5 and the glass shell 12 to the surface of the voltage multiplier module 2 is half the height of the annular boss 211. The sufficiently high annular boss 211 can provide a sufficiently long insulation distance, thereby forming reliable insulation protection for the junction of the anode Kovar 5 and the glass shell 12.

[0032] Optionally, the anode Kovar 5 is located inside the port of the second end of the glass shell 12, and the joint between the anode Kovar 5 and the glass shell 12 is located inside the glass shell 12. Relying on the insulation properties of the glass shell 12 itself, the insulation protection effect of the joint between the anode Kovar 5 and the glass shell 12 is further improved.

[0033] Optionally, the shell of the X-ray tube 1 is made of stainless steel, one end of the tube shell 4 is welded to the shell of the X-ray tube 1, and the other end of the tube shell 4 is sintered and fixed to the glass shell 12.

[0034] Optionally, the anode 11 is made of copper, one end of the anode tip Kovar 5 is welded to the anode 11, and the other end of the anode tip Kovar 5 is sintered and fixed to the glass shell 12.

[0035] It should be noted that both the shell end Kovar 4 and the anode end Kovar 5 are made of Kovar alloy, which is an iron-nickel-cobalt alloy with a low coefficient of thermal expansion and good mechanical properties. The coefficient of thermal expansion of this alloy is very close to that of most glass materials, so it can maintain dimensional stability when the temperature changes, making it an ideal material for manufacturing high-precision electronic components such as vacuum tubes, semiconductor devices, and capacitors.

[0036] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An improved structure for insulation protection of an X-ray source, wherein the X-ray source includes a ray tube (1), a voltage multiplier module (2), and a sealing cylinder (3). An anode (11) electrically connected to the voltage multiplier module (2) is provided on the ray tube (1). The sealing cylinder (3) is sleeved outside the anode (11), and both ends of the sealing cylinder (3) are fixedly connected to the ray tube (1) and the voltage multiplier module (2) respectively, thereby forming a sealed space (31) outside the anode (11). The sealed space (31) is filled with insulating oil. A glass shell (12) is provided outside the anode (11). The first end of the glass shell (12) is transitionally connected to the tube shell of the ray tube (1) through a tube shell end Kovar (4), and the second end of the glass shell (12) is transitionally connected to the anode (11) through an anode end Kovar (5). Its features are, The voltage multiplier module (2) is provided with an annular boss (211) extending into the sealed space (31). The annular boss (211) extends between the sealing cylinder (3) and the anode Kovar (5), and there are gaps between the annular boss (211) and the sealing cylinder (3) and between the annular boss (211) and the anode Kovar (5). The insulation coefficient of the material of the annular boss (211) is higher than that of the insulating oil.

2. The improved X-ray source insulation protection structure according to claim 1, characterized in that, The voltage multiplier module (2) includes an epoxy resin block (21). The annular boss (211) and the epoxy resin block (21) are integrally formed by solid potting process. The epoxy resin block (21) encapsulates a high voltage circuit board (22) and a feedback circuit board (23). The anode (11) is connected to the high voltage circuit board (22) and the feedback circuit board (23) through wires. The high voltage circuit board (22) is used to provide high voltage to the anode (11), and the feedback circuit board (23) is used to ensure the output quality and stability of the high voltage.

3. The improved X-ray source insulation protection structure according to claim 2, characterized in that, One end of the sealing cylinder (3) is fixed to the shell of the ray tube (1) by a flange, and the other end of the sealing cylinder (3) is glued to the epoxy resin block (21).

4. The improved X-ray source insulation protection structure according to claim 1, characterized in that, The distance from the junction of the anode Kovar (5) and the glass shell (12) to the surface of the voltage multiplier module (2) is half the height of the annular boss (211).

5. The improved X-ray source insulation protection structure according to claim 1, characterized in that, The anode Kovar (5) is located inside the port of the second end of the glass shell (12), and the joint between the anode Kovar (5) and the glass shell (12) is located inside the glass shell (12).

6. The improved X-ray source insulation protection structure according to claim 1, characterized in that, The shell of the X-ray tube (1) is made of stainless steel. One end of the tube shell end Kovar (4) is welded to the shell of the X-ray tube (1), and the other end of the tube shell end Kovar (4) is sintered and fixed to the glass shell (12).

7. The improved X-ray source insulation protection structure according to claim 1, characterized in that, The anode (11) is made of copper. One end of the anode end Kovar (5) is welded to the anode (11), and the other end of the anode end Kovar (5) is sintered and fixed to the glass shell (12).

Images