CN2350863Y

CN2350863Y - Direct-acting vacuum contactor

Info

Publication number: CN2350863Y
Application number: CN 98238826
Authority: CN
Inventors: 孙衍津
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-15
Filing date: 1998-09-15
Publication date: 1999-11-24
Anticipated expiration: 2008-09-15

Abstract

The utility model relates to a direct-acting vacuum contactor, belonging to a control circuit apparatus, composed of an electromagnetic driving mechanism and a vacuum arc extinguishing chamber. One end of a movable iron core is connected with a linkage rod, a movable contact is connected with the linkage rod by a movable conductive rod, a reaction spring is arranged between the linkage rod and the fixed end of a fixed iron core. The utility model has the advantages of compact structure, small size, uniform stress, the long service life of movable and fixed contacts, stable performance, low cost and wide application, and is a preferred control circuit apparatus in the power system under the voltage of 15KV.

Description

The direct-acting vacuum contactor

The utility model relates to a kind of direct-acting vacuum contactor, belongs to control apparatus.Be particularly suitable for dress usefulness in the electric power system of voltage below 15KV.

Contactor is one of requisite control apparatus in the electric power system, common in the past contactor is being switched on or switched off circuit in a flash, often produce electric arc between two contacts, industries such as this colliery that just is not suitable for might producing fuel gas in the working site or requirement of explosion proof is arranged, chemical industry are used.Based on above-mentioned situation, there are all kinds of vacuum contactors to come out in recent years in succession, because a series of excellent specific properties such as it has the not outer spray of compressive resistance height, electric arc, maintenance load is little, in light weight, noise is low, safe and reliable, it is more suitable for frequent operation than vacuum circuit-breaker, vacuum load switch simultaneously, this product has very strong competitiveness once coming out Just because of this, now is extensive use of in industries such as coal, metallurgy, petrochemical industry, communications and transportation, weaving, grain processing and skyscrapers.Yet the domestic and international in the past vacuum contactor that generally uses, its kind of drive is the lever driven type.As everyone knows, lever motion is to rotate, thus with the disjunction of the dynamic and static contact of contactor of lever interlock, also must be the rotation that has certain camber line.Through discovering to vacuum arc, vacuum arc in vacuum contactor breaking capacity scope, be generally low pressure diffused electric arc, when the horizontal disjunction of butt joint planar contact, the electric arc that is occurred between its contact is many arcs that is parallel to each other, and this class electric arc extinguishes when the electric arc natural zero-crossing first time usually.If but contact is not horizontal disjunction, but when having the disjunction of a certain angle, will be on one point between contact or some place electric arc appears.This class arc current comparatively concentrates the arcing time long, and more serious to the ablation of contact, electric arc also is not easy to extinguish, and then causes short, performance reduction in useful life.This just makes using of such vacuum contactor and develops and is subjected to certain limitation, caused numerous scientific workers' both domestic and external very big concern, all actively seek the effort of capturing this technical barrier, but up to the present do not seeing the relevant report of breaking through this technical barrier as yet.

The purpose of this utility model is to provide a kind of compact conformation, volume is little, cost is low, long service life, can realize the disjunction of dynamic/static contact horizontal linear, superior performance and stable direct-acting vacuum contactor.

The purpose of this utility model realizes by the following technical solutions, form by electromagnetic drive mechanism and vacuum interrupter, one end of its moving iron core and gangbar connect, and moving contact links to each other with gangbar by moving conductive rod, and reaction spring is located between the stiff end of gangbar and static iron core.

The utility model compared with prior art, because direct and gangbar connection with the moving iron core of electromagnetic drive mechanism, and cancelled lever, even a series of technical measures such as layout of reaction spring in addition, dynamic/static contact can be realized horizontal adhesive of straight line and disconnection, and through evidence have that compact conformation, volume are little, stressed evenly, dynamic/static contact long service life, stable performance, reduction use cost, advantage such as applied widely, implement simultaneously easily, be beneficial to and apply.

Fig. 1 is a main TV structure schematic diagram of the present utility model.

Fig. 2 is another embodiment of the present utility model.

Fig. 3 is another embodiment of the present utility model.

Embodiment of the present utility model is described in detail in conjunction with the accompanying drawings, moving iron core 8 is oppositely arranged with the working end that places the static iron core 7 in the coil 9 in the electromagnetic drive mechanism, the other end and gangbar 11 fuse, the other end of static iron core 7 is fixed, reaction spring 10 places electromagnet both sides, two ends to link to each other with the stiff end of gangbar, static iron core 7 respectively, place the dynamic and

static contact

4,3 in the vacuum interrupter 2, static conductive rod 1 one ends of its fixed contact 3 are fixed, moving contact 4 links to each other bellows 5 by moving conductive rod 6 with gangbar 11; That shown in Figure 2 is another embodiment of the present utility model, the non-operative end of moving iron core 17 is connected with gangbar 16 in the electromagnetic drive mechanism, place the non-operative end of the static iron core 18 in the coil 19 to fix, reaction spring 20 is located between gangbar 16 and static iron core 18 stiff ends, place the moving contact 15 in the vacuum interrupter 12 to link to each other with gangbar 16, the non-operative end of static conductive rod 13 is fixed; Fig. 3 is another embodiment of the present utility model, moving iron core 31 connects mutually with gangbar 28, place static iron core 21 non-operative end of coil 22 to fix, place the reaction spring 30 of both sides to be located between the stiff end of gangbar 28 and static iron core 21, place the moving contact 26 in the vacuum interrupter 25 to link to each other with gangbar 28 by moving conductive rod 27, the other end of the static conductive rod 23 on the fixed contact 24 that is oppositely arranged with it is fixed.

Claims

1, a kind of direct-acting vacuum contactor, form by electromagnetic drive mechanism and vacuum interrupter (2), (12), (25), an end that it is characterized in that moving iron core (8), (17), (31) connects mutually with gangbar (11), (16), (28), moving contact (4), (15), (26) link to each other with gangbar (11), (16), (28) by moving conductive rod (6), (29), (27), and reaction spring (10), (20), (30) are located between the stiff end of gangbar (11), (16), (28) and static iron core (7), (18), (21).