CN2427883Y

CN2427883Y - DC vacuum contactor

Info

Publication number: CN2427883Y
Application number: CN 00212457
Authority: CN
Inventors: 李玉敏
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-30
Filing date: 2000-06-30
Publication date: 2001-04-25
Anticipated expiration: 2010-06-30

Abstract

The utility model relates to a DC vacuum contactor, which comprises a pair of DC coils, a pair of iron cores, an armature iron, a push plate, a vacuum chamber, a reaction spring, a main contact spring, an auxiliary contact, a push rod, a bus bar and a base. The utility model is characterized in that the left and the right sides of the upper part of the base are respectively provided with a vacuum arc-extinguishing chamber; permanent magnets are arranged on both sides of the vacuum arc-extinguishing chamber; the upper part of the base and the left and the right sides of the arc-extinguishing chamber are provided with a pair of DC coils. Compared with the arc-extinguishing medium of air, oil, etc., the utility model has the advantages of no outer spray of electric arc, shock resistance, vibration resistance, etc., because the utility model adopts a vacuum arc-extinguishing medium; the utility model can effectively replaces imported products. The utility model also has the characteristics of simple structure, light weight, low cost, safety, etc.

Description

The direct current vacuum contactor

The utility model belongs to the low voltage electrical apparatus technology field, specifically a kind of direct current vacuum contactor.

Along with fast development of national economy, domestic use amount to main equipments such as electric locomotive, large-scale crane, electric power wheel self-discharging vehicle, power shovels increases swift and violent.The power of equipment is increasing, requirement to the electric property of DC motor, D.C. contactor is more and more higher, existing product can't effectively satisfy user's demand, and also there is not direct current vacuum extinction type contactor on the market, can only adopt air blowout type product to replace direct current vacuum extinction type contactor to keep production, this not only annual foreign exchange that will spend some, and failure rate is very high, and structure is also very complicated.

The purpose of this utility model provides that a kind of compact conformation, volume are little, the direct current vacuum contactor of permanent magnetism arc extinguishing type.

The purpose of this utility model is achieved in that it comprises a pair of dc coil, a pair of iron core, armature, push pedal, vacuum chamber, reaction spring, main spring, auxiliary contact, push rod, bus, the pedestal of touching, it is characterized in that being respectively arranged with a vacuum interrupter at pedestal top the right and left, be provided with permanent magnet in the vacuum interrupter both sides, on pedestal top and the left and right sides of arc control device bottom be provided with a pair of dc coil.

The utility model is owing to adopt the vacuum extinction medium, compare with air, wet goods arc-extinguishing medium have the outer spray of electric arc, advantage such as shock-resistant, anti-vibration, import substitutes effectively.This is novel also have simple in structure, volume is little, in light weight, characteristics such as cost is low, easy to maintenance, safe and reliable, long service life, applied range.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is a structural representation sketch of the present utility model

Fig. 2 is the vertical view of Fig. 1

Shown in Fig. 1,2,13 among the figure is pedestal, respectively is provided with vacuum chamber 11 about the top of pedestal 13, is provided with permanent magnet 2 in the both sides of vacuum chamber 11; Be provided with armature 1 in the middle part of pedestal, the bottom of vacuum chamber, be provided with reaction spring 3 between armature and base bottom, respectively be provided with a coil 4 about pedestal top, armature bottom, hub of a spool is an iron core 5.Push pedal 8 fuses with armature 1, push pedal 8 is arranged on the rear end of vacuum chamber 11, fuses with vacuum chamber, is provided with mainly to touch spring 9 between vacuum chamber and push pedal, respectively is provided with one about middle side part and assists and touch 6 pedestal outside, auxilliary 6 upper ends of touching have and auxilliaryly touch push rod 10, and push rod 10 links to each other with push pedal 8.Bus 12, bus 7 link to each other with vacuum chamber 11 in addition.Its operation principle is: bus 7, bus 12 are connected in the DC circuit, coil 4 energising backs produce magnetic force, armature and iron core 5 adhesives, driving push pedal 8 rotates, push pedal promotes the vacuum chamber moving contact and the auxilliary push rod 10 that touches moves, main contact and auxiliary contact are closed close, compression reaction spring 3 and master touch spring 9, and at this moment DC circuit is in conducting state.During coil 4 outages, reaction spring, main touching under the spring action, armature is opened, main contact disconnects, and produces electric arc, and electric arc extinguishes under vacuum chamber and permanent magnet effect, and cuts off DC circuit reliably.

Claims

1, a kind of direct current vacuum contactor, it comprises a pair of dc coil, a pair of iron core, armature, push pedal, vacuum chamber, reaction spring, main spring, auxiliary contact, push rod, bus, the pedestal of touching, it is characterized in that being respectively arranged with a vacuum interrupter at pedestal top the right and left, be provided with permanent magnet in the vacuum interrupter both sides, on pedestal top and the left and right sides of arc control device bottom be provided with a pair of dc coil.