CN86205784U

CN86205784U - Silver saving electromagnetic contactor with bi-bridge type contact

Info

Publication number: CN86205784U
Application number: CN 86205784
Authority: CN
Inventors: 宁从志
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-08-12
Filing date: 1986-08-12
Publication date: 1987-04-01

Abstract

Disclosed is a silver saving electromagnetic contactor with bi-bridge type contact, which is suitable for direct-acting electromagnetic contactor with high or medium capacity. The utility model mainly relates to that on the basis of the existing single contact bridge, another arc-proof arcing contact bridge is appended; therefore, a direct-acting bi-bridge type four-breakpoint contact is formed; because bi-bridge type contacts are paralleled, the arcing contact can play the role of shunting action of a main contact and the dimension of the silver main contact can be reduced by a half size than past; because the silver main contact is effectively protected by the arcing contact, the main contact can be safe from electric arc burn and the electrical life index of the contacts can be improved with distinct effect of silver saving for the contacts.

Description

Silver saving electromagnetic contactor with bi-bridge type contact

Big capacity electromagnetic contactor during bi-bridge type contact silver saving electromagnetic contactor belongs to.

The general structure pattern of electromagnetic contactor is various, but with regard to the contact head system, generally is divided into finger-type single-break and single bridge shape double break point two big classes.Domestic and international at present general task A.C. contactor adopts single bridge shape double break point silver of Direct Action Type or silver-based contact, (as shown in Figure 1) mostly.The electromagnetic contactor structure of this kind form is very compact, and is though volume is little, in light weight.But it is subjected to the restriction of contact pressure, must take silver or money base to mould alloy and do contact, and in view of the production lot of electromagnetic contactor is very big, and contact is the easiest to be burnt out by electric arc, needs often to change contact, thereby the consumption of contact silver amount is also just big especially.As everyone knows, silver is very valuable metal, and the resource anxiety costs an arm and a leg, and therefore how to economize on silver, is the task of top priority.

Purpose of the present invention is to improve how to greatest extent the electric life index of contact, and adopts new measure to economize on silver from structure.Promptly be designed to bi-bridge type four breakpoint contacts; because two to touch bridge be in parallel; arcing contact can alleviate the load of main contact; therefore silver main contact size can dwindle about 50%; again since contact in the switching process; copper tungsten arcing contact can protect silver main contact to avoid electrical arc erosion effectively, thereby can reach the purpose of Jie Yin and raising electric life index.

Fig. 1, single bridge double break contact structural representation.

Fig. 2, doube bridge four breakpoint structure of contact terminal schematic diagrames.

Fig. 3, CJ10 mouth-100 A.C. contactor bi-bridge type four breakpoint structure of contact terminal schematic diagrames.

Below in conjunction with accompanying drawing the present invention is specified.

The structure of contact terminal of this electromagnetic contactor is compared with the contact of general electromagnetic contactor, institute's difference only is to touch on the basis of bridge general electromagnetic contactor single, and the arc of adding an anti-electric arc touches bridge, be arcing contact, constitute Direct Action Type bi-bridge type four breakpoint contact systems.Be illustrated below by accompanying drawing 2.The end of brass terminal block (2) with (9) curved Shape, burn-on silver-colored contact block or money base of its end moulds the alloy contact block, be screwed then on insulating base (1), and constitute a master and touch bridge with the bridge (5) that touches that is welded with silver contact, be used for carrying running current specially, brazen ㄇ shape fixed contact (3) with 8. go up, copper---the tungsten contact of burn-oning, be screwed then in main fixed contact and 2. with 9. go up, and be welded with copper---4. the bridge that touches of tungsten contact constitutes an arc and touches bridge, is used for connecting the starting current and the breaking arc of motor specially.When contact is shown in an open position, two are touched bridge and organically are superimposed, and form an integral body.But, in the contact closure process, because main, arcing contact is opened apart from different, the opening of arcing contact apart from the distance of opening less than main contact, arcing contact is connected earlier, under spring effect 7., continues to remain on on-state.Initiatively contact is under spring effect 6. subsequently, and main contact is connected, and two of this moments touches bridge and is separated from each other.Contact is from being closed into the running order of opening, then with last opposite.Be that main contact is disconnected earlier, disconnected behind the arcing contact, the electric arc on the arcing contact blows to arc control device along leading arc angle, thereby can avoid main contact by electric arc burn effectively under the electrodynamic action in arcing contact loop.

The utility model touches bridge by this arc that increases newly, has protected main contact to avoid electric arc burn effectively, thereby can improve the electric life index of main contact greatly, can significantly reduce the consumption of silver or silver-base alloy contact like this.Again because the doube bridge contact is in parallel, thereby arcing contact can alleviate the load of main contact, so former silver-based contact size can be dwindled approximately half.

Embodiment:

Fig. 3 is the structural representation of CJ10 mouth-100 A.C. contactor bi-bridge type four breakpoint contacts.As seen from Figure 3, its change part only is a contact system, after the contact parameter is done suitable adjustment, just can be made into bi-bridge type contact silver saving electromagnetic contactor.

Claims

1, silver saving electromagnetic contactor includes the single bridge that touches, it is characterized in that having the arc of an additional anti-electric arc to touch bridge, promptly arcing contact constitutes Direct Action Type doube bridge shape four breakpoint contacts, opening of main contact and arcing contact apart from different, the opening of arcing contact apart from the distance of opening less than main contact.

2, silver saving electromagnetic contactor according to claim 1, the active fixed contact material that it is characterized in that described main contact are that fine silver or money base mould alloy.

3, silver saving electromagnetic contactor according to claim 1 is characterized in that the dynamic and static contact material of arc of the arcing contact of described anti-electric arc is a copper-tungsten.