CN201054461Y

CN201054461Y - Thin type high power gas discharge tube

Info

Publication number: CN201054461Y
Application number: CNU2007200400688U
Authority: CN
Inventors: 王江祥; 姜厚玺; 刘俊; 朱楠亭
Original assignee: ZHENJIANG ELECTRONIC TUBE FACTORY
Current assignee: ZHENJIANG ELECTRONIC TUBE FACTORY
Priority date: 2007-06-25
Filing date: 2007-06-25
Publication date: 2008-04-30
Anticipated expiration: 2017-06-25

Abstract

The utility model discloses a ceramic thin large-power gas discharging tube for a power source against lightening, which comprises an upper and a lower poles, and a ceramic tube used as insulating medium arranged between the two poles; the sealing cavity formed by three aforesaid components is filled with inert gas with certain pressure; the discharging tube has an upper and a lower part which are symmetrical; a silver copper welding strip sealed by braze welding is arranged between the two poles and the ceramic tube. The two poles and one ceramic tube form a pair of discharging gaps. The inner end faces of the two poles are pasted with a modified oxide used as an electron launching layer, the central parts of the two poles inwards concave to be a disc shape; the outer diameter of the discharging tube is 18 to 22 mm, and the thickness is 5 to 6 mm. The treatment on the inner end surface of the poles and changing the form of the pole surface can increase the discharging area and enhance the discharging ability, therefore, the impulse withstand current capacity of the discharging tube can be more than 40 KA.

Description

Slim high-power gas charging pipe

Technical field

The utility model relates to the ceramic gas discharge tube in a kind of electrical equipment overvoltage protection, particularly the ceramic gas discharge tube used of power lightning protection.

Background technology

As wire communication facility overvoltage protection gas discharge tube; its structure is porcelain tube to be arranged as dielectric between two electrodes up and down; fill the high purity inert gas of certain pressure in the seal chamber inside that the three constitutes; it impacts flow-resistant capacity and generally can satisfy the demand below 10kA; but the gas discharge tube of using as the power-supply device overvoltage protection; it impacts flow-resistant capacity and reaches more than the 20kA under volume can not too big situation in requirement; therefore because discharge capacity increases severely, original structure is the specification requirement of incompatibility new application.

Summary of the invention

The purpose of this utility model is in order to overcome the deficiencies in the prior art, the slim high-power gas charging pipe that provides a kind of power lightning protection to use.

The technical solution of the utility model is: comprise up and down two electrodes, porcelain tube arranged as dielectric between two electrodes up and down, fill the inert gas of certain pressure in the seal chamber inside that the three constitutes, discharge tube is a symmetric body up and down, the silver-bearing copper weld tabs that one deck sealed with brazing is arranged between two electrodes and porcelain tube, two electrodes and porcelain tube discharging gap that partners, coating one deck modified oxide is as electron emission layer on the inner face of two electrodes.

The middle part of described two electrodes caves inward dish.

The external form diameter of described discharge tube is 18～22mm, and gauge is 5～6mm.

The utility model can effectively increase machining area and enhanced discharge ability by the shape to surface treatment of electrode inner face and change electrode surface, and the impact flow-resistant capacity of discharge tube is reached more than the 40KA.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:

Fig. 1 is a structure cutaway view of the present utility model;

Embodiment

As shown in Figure 1, discharge tube is by two electrodes 1 up and down, high-alumina ceramic tube 3 is being arranged as dielectric between two electrodes 1 up and down, fill the high purity inert gas of certain pressure in the seal chamber inside that the three constitutes, discharge tube is an axisymmetric body, between two electrodes 1 and porcelain tube 3, form with silver-bearing copper weld tabs 2 sealed with brazing, two electrodes and 1 one porcelain tubes 3 discharging gap that partners, the porcelain tube inwall scribbles conductive strips, coating one deck modified oxide is as electron emission layer on the inner face of two electrodes 1, the middle part of described two electrodes 1 caves inward dish, the external form diameter of discharge tube is 18～22mm, and gauge is 5～6mm.

Claims

1. slim high-power gas charging pipe, comprise up and down two electrodes (1), porcelain tube (3) arranged as dielectric between two electrodes (1) up and down, fill the inert gas of certain pressure in the seal chamber inside that the three constitutes, it is characterized in that: discharge tube is symmetric body up and down, the silver-bearing copper weld tabs (2) that one deck sealed with brazing is arranged between two electrodes (1) and porcelain tube (3), two electrodes (1) and a porcelain tube (3) discharging gap that partners, coating one deck modified oxide is as electron emission layer on the inner face of two electrodes (1).

2. slim high-power gas charging pipe according to claim 1 is characterized in that: the middle part of described two electrodes (1) caves inward dish.

3. slim high-power gas charging pipe according to claim 2 is characterized in that: the external form diameter of discharge tube is 18～22mm, and gauge is 5～6mm.