CN218123346U

CN218123346U - Microfocus X-ray tube

Info

Publication number: CN218123346U
Application number: CN202222193089.0U
Authority: CN
Inventors: 张明; 朱小炯; 蒋永盛
Original assignee: HANGZHOU KAILONG MEDICAL INSTRUMENTS CO Ltd
Current assignee: HANGZHOU KAILONG MEDICAL INSTRUMENTS CO Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-12-23
Anticipated expiration: 2032-08-19

Abstract

The application relates to a micro-focus X-ray tube, which comprises a beryllium window part and an anode part, wherein the beryllium window part is fixedly connected with the anode part, and the micro-focus X-ray tube is characterized in that the beryllium window part consists of a beryllium sheet and a shell, and the beryllium sheet is fixed on the shell through diffusion welding. The anode part consists of an anode cap, an anode head, an anode cover, an anode kovar ring and a glass shell, the anode cap, the anode head, the anode cover and the anode kovar ring are fixed into a whole, and the glass shell is fixed between the outer shell and the anode kovar ring in a sealing mode. And the anode cap and the anode head, the anode head and the anode cover, and the anode head and the anode kovar ring are synchronously vacuum-welded. The anode kovar ring is made of kovar alloy suitable for packaging between glass and anode head materials. The method and the device reduce processes, reduce cost, reduce quality control points and improve product qualification rate and quality.

Description

Microfocus X-ray tube

Technical Field

The application relates to a microfocus X-ray tube, which is mainly suitable for the production of the X-ray tube.

Background

In the microfocus X-ray tube in the prior art, a beryllium window part structure mainly comprises the following components: the beryllium window comprises a beryllium sheet 1', a beryllium window support 2' and a housing 3', an anode part structure comprises an anode cap 4', an anode head 5', an anode cover 6', an anode kovar ring 7', a small glass shell 8' and a large glass shell 9', and the beryllium window part is connected in the following way: the beryllium sheet 1', the beryllium window support 2' and the shell 3 'are integrally brazed, the brazing residual stress is large, and when the micro-focus X-ray tube works, the beryllium sheet 1' is heated to generate thermal stress, which can cause the cracking of a welding seam, destroy the vacuum environment in the tube and cause the failure of the product. The anode part is connected in the following way: respectively welding or riveting an anode cap 4', an anode cover 6', an anode kovar ring 7 'and an anode head 5', then sealing the anode kovar ring 7 'with a small glass bulb 8', and finally sealing a large glass bulb 9 'with the small glass bulb 8', wherein the connection mode is relatively complex in procedure; when the riveting mode is adopted for connection, the cleanliness and the smoothness of the riveting point position cannot be guaranteed, so that the product performance cannot be guaranteed.

Disclosure of Invention

The technical problem that this application was solved is to overcome the above-mentioned shortcoming that exists among the prior art, and provides a structure of simplifying and production procedure, and product quality is good, with low costs microfocus X-ray tube.

The technical scheme adopted by the application for solving the technical problems is as follows: a microfocus X-ray tube comprises a beryllium window part and an anode part, wherein the beryllium window part is fixedly connected with the anode part, and the microfocus X-ray tube is characterized in that the beryllium window part consists of a beryllium sheet and a shell, and the beryllium sheet is fixed on the shell through diffusion welding, so that a beryllium window support in the prior art is eliminated, the structure is simplified, the production cost is reduced, the negative influence (the diffusion welding residual stress is small and can be almost ignored) on the product quality after the beryllium sheet is heated is reduced, and the risk of welding seam cracking is reduced.

This application the positive pole part comprises positive pole cap, positive pole head, positive pole cover, positive pole kovar ring, glass bulb, and positive pole cap, positive pole head, positive pole cover, positive pole kovar ring are fixed as an organic whole, and the glass bulb is sealed to be fixed between shell, positive pole kovar ring. The structure of the anode part is changed, the small glass bulb is cancelled, the sealing procedure of the small glass bulb and the anode kovar ring is omitted, a quality control point is reduced, and the production yield of products is improved; the anode kovar ring is changed in appearance structure, and the glass shell is directly sealed with the anode kovar ring.

And the anode cap and the anode head, the anode head and the anode cover, and the anode head and the anode kovar ring are synchronously vacuum-welded. After synchronous vacuum brazing, compared with riveting, the cleanliness and smoothness in the pipe are better, and the product performance is ensured; compared with a step-by-step brazing method, the vacuum furnace has the advantages of more uniform synchronous welding heating, higher efficiency and better welding effect.

The anode kovar ring is made of kovar alloy suitable for being packaged between glass and anode head materials, and influences of different expansion coefficients on product quality are reduced.

After the glass shell is connected with the Kovar connecting piece suitable for packaging between glass and shell materials, the glass shell is welded with the shell through the Kovar connecting piece, and the influence of different expansion coefficients on the product quality is reduced.

Compared with the prior art, the application has the following advantages and effects: the process is reduced, the cost is reduced, the quality control points are reduced, and the product percent of pass and the product quality are improved.

Drawings

Fig. 1 is a schematic view of a prior art structure.

Fig. 2 is a schematic structural diagram of an embodiment of the present application.

Detailed Description

The present application will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present application and are not intended to limit the present application.

Referring to fig. 2, the microfocus X-ray tube according to the embodiment of the present application includes a beryllium window portion 1 and an anode portion 2, the beryllium window portion 1 is fixedly connected to the anode portion 2, and the design features are that: the beryllium window part 1 consists of a beryllium sheet 11 and a shell 12, and the beryllium sheet 11 is fixed on the shell 12 by diffusion welding in the prior art, thereby eliminating a beryllium window bracket in the prior art and simplifying the structure. The anode part 2 is composed of an anode cap 21, an anode head 22, an anode cover 23, an anode kovar ring 24 and a glass bulb 25, the anode cap 21 and the anode head 22 are in vacuum welding, the anode head 22, the anode cover 23 and the anode kovar ring 24 are in vacuum welding, and the glass bulb 25 is fixed between the shell 12 and the anode kovar ring 24 in a sealing mode. The anode kovar ring 24 is made of kovar alloy suitable for encapsulation between glass and the material (copper in particular) of the anode head 22. The glass envelope 25 is connected to a kovar connector suitable for sealing between glass and the material of the outer envelope 12 (stainless steel in particular), and then welded to the outer envelope 12 through the kovar connector.

In the anode part 2, a small glass bulb is omitted, the structure of the anode kovar ring 24 is changed, and the glass bulb 25 is directly sealed with the anode kovar ring 24, so that parts and processes are saved, and the efficiency is improved.

In the application, the anode head 22 of the anode part 2, the anode cap 21, the anode cover 23 and the anode kovar ring 24 are synchronously vacuum-welded, and compared with conventional riveting, the cleanliness and smoothness in the tube are better; compared with step-by-step welding, the welding temperature is more uniform, the effect is better, and the efficiency is higher.

All simple variations and combinations of the features and aspects of the present application are considered to fall within the scope of the present application.

Claims

1. A microfocus X-ray tube comprises a beryllium window part and an anode part, wherein the beryllium window part is fixedly connected with the anode part, and the microfocus X-ray tube is characterized in that: the beryllium window part consists of a beryllium sheet and a shell, and the beryllium sheet is fixed on the shell through diffusion welding.

2. The microfocus X-ray tube of claim 1, wherein: the anode part consists of an anode cap, an anode head, an anode cover, an anode kovar ring and a glass shell, the anode cap, the anode head, the anode cover and the anode kovar ring are fixed into a whole, and the glass shell is fixed between the outer shell and the anode kovar ring in a sealing mode.

3. The microfocus X-ray tube according to claim 2, wherein: and the anode cap and the anode head, the anode head and the anode cover, and the anode head and the anode kovar ring are synchronously vacuum-welded.

4. The microfocus X-ray tube according to claim 2, wherein: the anode kovar ring is made of kovar alloy suitable for packaging between glass and anode head materials.

5. The microfocus X-ray tube according to claim 2, wherein: and after the glass shell is connected with a Kovar connecting piece suitable for packaging between glass and shell materials, the glass shell is welded with the shell through the Kovar connecting piece.