RU207503U1 - ARC EXTINGUISHING CHAMBER - Google Patents

Abstract

The utility model relates to contactors with electric arc extinguishing devices. The utility model is used in the field of electrical engineering, in particular, in the design of vacuum circuit breakers and contactors of various voltage classes. The arc-extinguishing chamber contains a contact system with movable and fixed contacts, a housing, a bellows, in a fixed contact, the surface of which is in contact with the surface of the movable contact in the closed position of the contacts, an element is placed that allows tightly fixing a fixed contact with a fixed contact holder, and an element is located in the movable contact , allowing the movable contact to be tightly fixed to the movable contact holder. The technical result is to increase the durability of the structure. 1 ill.

Description

The utility model relates to contactors with arc extinguishing devices. The utility model is used in the field of electrical engineering, in particular, in the design of vacuum circuit breakers and contactors of various voltage classes.

The closest in technical essence and the achieved effect is a vacuum arc-extinguishing chamber (patent RU 2156514C1, publ. 09/20/2000, bulletin No. 26), containing a contact system with movable and fixed contacts and a ceramic insulating body made with the possibility of vacuum-tight soldering metal parts to it, ceramic soldering of metal parts to it, ceramic insulating body made of forsterite ceramics. The disadvantage of this prototype is the relatively short service life.

The task to be solved by the claimed utility model is the development of a device with a long service life.

This problem is solved due to the fact that the arc-extinguishing chamber contains a contact system with movable and fixed contacts, a housing, a bellows, in a fixed contact, the surface of which is in contact with the surface of the movable contact in the closed position of the contacts, an element is placed that allows you to tightly fix the fixed contact with the holder of the fixed contact, and an element is placed in the movable contact that allows the movable contact to be tightly fixed with the movable contact holder.

The technical result provided by the given set of features is to increase the durability of the structure.

The essence of the utility model is illustrated by a drawing, which shows the structure of the arc chute in section, where

1 - contactor chamber

2 - movable contact

3 - fixed contact

4 - bellows

5th element

6 - protective screen

7 - housing of the contactor chamber

8 - fixed contact holder

9 - the holder of the movable contact

10 - housing of the contactor chamber

11 - bushing.

Inside the chamber of the contactor 1, in which the arc is extinguished, there are movable contact 2, fixed contact 3, bellows 4. The body of the arc chute is made heat-resistant and insulating.

The movable and fixed contacts are a disc plate with a through hole in the center.

In the stationary contact 3, the surface of which is in contact with the surface of the movable contact 2 in the closed position of contacts 2 and 3, there is an element 5 connected to this stationary contact 3.

Element 5 is a cylindrical rivet with an expansion on one side, allowing it to be tightly fixed through the contact hole into the contact holder. The connection of element 5 and stationary contact 3 is made in such a way that it is impossible to manually separate this element 5 and stationary contact 3. Similarly, the same element 5 is attached through the movable contact 2.

The holder 8 of the fixed contact and the fixed contact 3 are connected by means of the element 5, then the arc chute undergoes thermal action (by any known method). The heat-resistant body of the arc chute allows for thermal action without destroying the arc chute. Thus, a tight and reliable connection of the fixed contact 3 and the holder of the fixed contact 8 is formed. Similarly, the movable contact 2 is attached to the holder 9 of the movable contact by means of the element 5.

The connection of the element and the fixed contact, as well as the connection of the element and the movable contact, is made in such a way that it is impossible to manually separate the element, the contact and the contact holder.

Fastening the contact and the contact holder in this way allows these parts to be securely fastened to each other, which significantly increases the durability of the camera.

The device works as follows. When contacts 2 and 3 are closed, the current from contact 2 goes to contact 3, when the contacts are opened, the electric arc extinguishes inside the chamber housing 1, bellows 4 ensures the mobility of movable contact 2.

Claims (1)

An arc-extinguishing chamber containing a contact system with movable and fixed contacts, a housing, a bellows, characterized in that in the fixed contact, the surface of which is in contact with the surface of the movable contact in the closed position of the contacts, there is an element that allows tightly fixing the fixed contact with the holder of the fixed contact, and in the movable contact there is an element that allows tightly fixing the movable contact with the holder of the movable contact, while the element that allows it to be tightly fixed through the contact hole into the contact holder is made with expansion on one side, and the body of the arc-extinguishing chamber is made heat-resistant.

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