CN211238152U

CN211238152U - X-ray tube with heat dissipation window

Info

Publication number: CN211238152U
Application number: CN202020226429.3U
Authority: CN
Inventors: 汪上杰; 王啸; 方奇
Original assignee: Maimo Vacuum Technology Wuxi Co ltd
Current assignee: Maimo Vacuum Technology Wuxi Co ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-08-11
Anticipated expiration: 2030-02-28

Abstract

The utility model discloses a take heat dissipation window's X-ray tube belongs to X-ray tube technical field. The X-ray tube with the heat dissipation window comprises a waist drum, a cathode insulator and an anode insulator, wherein the cathode insulator and the anode insulator are respectively and fixedly connected to two ends of the waist drum, and the waist drum is made of oxygen-free copper or stainless steel and is grounded, so that secondary electrons can be absorbed to prolong the service life of the waist drum; the waist drum is fixedly connected with the anode insulator through a kovar; the side wall of the waist drum is welded with a window used for penetrating X rays; the window is a titanium window, the middle part of the window is an irradiation area, and a plurality of radiating grooves are uniformly distributed on the periphery of the irradiation area, so that the temperature of the window can be effectively reduced, and the condition that the vacuum degree of the X-ray tube is influenced by cracks or blacking at the welding position of the window or the window is prevented.

Description

X-ray tube with heat dissipation window

Technical Field

The utility model relates to a X-ray tube technical field, in particular to take heat dissipation window's X-ray tube.

Background

With the rapid development of science and technology, the variety of medical equipment is increasing, and the application in medical work is also becoming more extensive. X-ray tubes are used to generate X-rays, and play an important role in various fields such as medical diagnosis, safety inspection, and nondestructive inspection. The basic principle of the X-ray tube is that thermal electrons thermally excited by the cathode filament strike the target plate under the action of the cathode and anode accelerating electric field. Wherein 1% of the energy is converted to X-rays and emitted through the window, and the remaining about 99% of the energy is converted to thermal energy. The X-ray tube that the shell was made with hard glass, along with the increase of live time, the tungsten evaporation of filament evaporation and anode target face crack edge will make the deposit of attached one deck tungsten on the shell inner wall, and the high-speed electron just can not avoid to the bombardment erosion of shell inner wall, finally leads to the shell to be punctured, makes the X-ray tube damage.

At present, a metal shell is used on the market to replace a hard glass shell, but a window needs to be arranged on the side wall of the metal shell so that X-rays can pass through the window, the brazing part of the window and the window is bombarded by secondary electrons or scattered electrons for a long time, and under the use condition of alternating heat load, due to thermal stress generated by temperature difference between the surface and the inner layer, the brazing part of the window or the window is easy to crack or blacken, so that the vacuum degree of the X-ray tube is reduced, and the X-ray tube is damaged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a take heat dissipation window's X-ray tube to solve hard glass shell and be punctured easily and metal casing window department of brazing or the window produces crackle easily or blacken, leads to the problem that X-ray tube vacuum reduces.

In order to solve the technical problem, the utility model provides an X-ray tube with a heat dissipation window, which comprises a waist drum, a cathode insulator and an anode insulator, wherein the cathode insulator and the anode insulator are respectively and fixedly connected with two ends of the waist drum;

the waist drum is fixedly connected with the anode insulator through a kovar;

and the side wall of the waist drum is welded with a window for passing through X rays.

Optionally, the window is a titanium window, the middle is an irradiation area, and the irradiation area is a titanium plate with uniform thickness.

Optionally, a plurality of heat dissipation grooves are uniformly distributed around the irradiation area.

Optionally, the window is arc-shaped, and the peripheral edge of the window is brazed with the waist drum contact surface.

Optionally, the waist drum is made of oxygen-free copper or stainless steel.

Optionally, the cathode insulator and the anode insulator are made of ceramic or glass.

The utility model provides an in the X-ray tube of area heat dissipation window, including waist drum, cathode insulator and anode insulator fixed connection respectively in the waist drum both ends, the material of waist drum is oxygen-free copper or stainless steel and ground connection, can absorb secondary electron and prolong the life of waist drum; the waist drum is fixedly connected with the anode insulator through a kovar; the side wall of the waist drum is welded with a window used for penetrating X rays; the window is a titanium window, the middle part of the window is an irradiation area, and a plurality of radiating grooves are uniformly distributed on the periphery of the irradiation area, so that the temperature of the window can be effectively reduced, and the condition that the vacuum degree of the X-ray tube is influenced by cracks or blacking at the welding position of the window or the window is prevented.

Drawings

Fig. 1 is a schematic structural diagram of an X-ray tube with a heat dissipation window according to the present invention;

fig. 2 is a schematic structural diagram of an X-ray tube drum with a heat dissipation window provided by the present invention;

fig. 3 is a schematic structural diagram of an X-ray tube window with a heat dissipation window provided by the present invention.

Detailed Description

The following describes an X-ray tube with a heat dissipation window in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

The utility model provides an X-ray tube with a heat dissipation window, the structure of which is shown in figure 1 and figure 2, comprising a waist drum 1, a cathode insulator 2 and an anode insulator 3, wherein the cathode insulator 2 and the anode insulator 3 are respectively fixedly connected with two ends of the waist drum 1; the waist drum 1 is fixedly connected with the anode insulator 3 through a kovar 4; the side wall of the waist drum 1 is welded with a window 5 for passing through X-rays.

Specifically, as shown in fig. 2 and 3, the window 5 is arc-shaped, and the peripheral edge is brazed with the contact surface of the waist drum 1; the window 5 is a titanium window, the middle part is an irradiation area 51, the irradiation area 51 is a titanium plate with uniform thickness, and a plurality of radiating grooves 52 are uniformly distributed around the irradiation area 51; as understood by the skilled person, the effective irradiation area of the 51-bit X-ray tube in the irradiation area has uniform thickness and no heat dissipation groove, so that the influence on the X-ray imaging quality due to different filtration can be avoided; when secondary electrons or scattered electrons bombard the window 5 and the brazing position thereof, the temperature is increased, the heat dissipation grooves 52 can effectively transfer heat to the outside, and in addition, the heat expansion resistance of the window 5 is improved due to the structure of the plurality of heat dissipation grooves 52, so that the service life of the X-ray tube is further prolonged.

Specifically, with continuing reference to fig. 1 and 2, the waist drum 1 is made of oxygen-free copper or stainless steel and is grounded through a lead, and as the service life of the conventional hard glass envelope increases, the evaporation of the filament and the evaporation of tungsten at the crack edge of the anode target surface adhere a layer of tungsten deposits on the inner wall of the envelope, so that the bombardment and erosion of high-speed electrons on the inner wall of the envelope cannot be avoided, and finally, the glass is broken down, and the X-ray tube is damaged. The metal waist drum can absorb secondary electrons, so that the service life of the waist drum 1 is prolonged; the cathode insulator 2 and the anode insulator 3 are made of ceramic or glass.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. The X-ray tube with the heat dissipation window is characterized by comprising a waist drum (1), a cathode insulator (2) and an anode insulator (3), wherein the cathode insulator (2) and the anode insulator (3) are respectively and fixedly connected to two ends of the waist drum (1);

the waist drum (1) is fixedly connected with the anode insulator (3) through a kovar (4);

the side wall of the waist drum (1) is welded with a window (5) for passing through X rays.

2. The X-ray tube with a heat dissipation window as set forth in claim 1, wherein the window (5) is a titanium window with an irradiation region (51) in the middle, and the irradiation region (51) is a titanium plate of uniform thickness.

3. The X-ray tube with a heat dissipation window as set forth in claim 2, wherein a plurality of heat dissipation grooves (52) are uniformly distributed around the irradiation region (51).

4. The X-ray tube with a heat radiation window as set forth in claim 1, wherein the window (5) is formed in a circular arc shape, and the peripheral edge is brazed to the contact surface of the waist drum (1).

5. The X-ray tube with a heat dissipation window as set forth in claim 1, wherein the waist drum (1) is made of oxygen-free copper or stainless steel.

6. The X-ray tube with a heat dissipation window as claimed in claim 1, characterized in that the cathode insulator (2) and the anode insulator (3) are made of ceramic or glass.