Vacuum switch tube

A vacuum switch tube and contact technology, applied in the electrical field, can solve the problems of insufficient withstand voltage and difficulty in solving electric field concentration, etc., and achieve the effects of improving high voltage withstand capability, improving current breaking capability, and reducing poor contact.
CN101359549AActive Publication Date: 2009-02-04BEIJING BOE VACUUM ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING BOE VACUUM ELECTRONICS CO LTD
Publication Date
2009-02-04

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Abstract

The invention relates to a vacuum switch tube, comprising a first electric conduction pole and a second electric conduction pole. A contact is arranged at one end of the first electric conduction pole and a second contact is arranged at one end of the second electric conduction pole. Each of the first contact and the second contact comprises an electric conduction assembly and a magnetic conduction assembly which are sealed inside a vacuum tube face to face with each other; wherein the front end of the first contact is provided with a convex hemispheroid and the front end of the second contact is provided with a concave hemispheroid which matches with the convex hemispheroid at the front end of the first contact. The electric conduction assembly and the magnetic conduction assembly are matched like Yin-Yang fish in shape. The magnetic conduction assembly of the first contact is arranged face to face with the electric conduction assembly of the second contact, and the electric conduction assembly of the first contact is arranged face to face with the magnetic conduction assembly of the second contact. The surface areas of the contacts of the vacuum switch tube are increased, thus reducing the increase of the resistance caused by poor contact. Meanwhile, a revolving magnetic field is formed between contacts of the convex hemispheroid and the concave hemispheroid, which is good for arc extinguishing, thus improving breaking capacity.
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Description

technical field

[0001] The invention relates to a vacuum switch tube, in particular to a vacuum switch tube with opposite contacts in an arc-extinguishing chamber, which belongs to the field of electrical technology. Background technique

[0002] A switchgear is an important device in a circuit, which plays the role of connecting and disconnecting the circuit. In the process of disconnecting the circuit of the switchgear, the switch tube will generate an arc, which will cause the temperature of the contacts and other components in the switch tube to rise sharply and cause loss, especially in the high-voltage circuit, the arc intensity generated when the line is disconnected It is very large, so that the service life of the switch tube is greatly shortened. Therefore, the switching tube must be extinguished during the circuit switching process.

[0003] Most of the current switchgear uses arc extinguishing media such as oil, sulfur hexafluoride, air, semiconductor or vacuum...

Claims

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