CN103594279A

CN103594279A - Low-voltage vacuum energy-saving normally-open direct-current contactor

Info

Publication number: CN103594279A
Application number: CN201310589237.3A
Authority: CN
Inventors: 赵天林; 赵玉山; 耿俊丹; 高景成
Original assignee: ZHENJIANG TIANXIANG PRECISION ELECTROMECHANICAL CO Ltd
Current assignee: ZHENJIANG TIANXIANG PRECISION ELECTROMECHANICAL CO Ltd
Priority date: 2013-11-20
Filing date: 2013-11-20
Publication date: 2014-02-19

Abstract

The invention provides a low-voltage vacuum energy-saving normally-open direct-current contactor which comprises main contact binding posts (15), main fixed contacts (13), main movable contacts (12), a movable iron core (1), a fixed iron core (8), a contactor body (16) and springs, and further comprises outer-layer maintaining attraction coils (6), inner-layer starting coils (5), coil movable contacts (4) and coil fixed contacts (3). The main movable contacts (12) are arranged below the main fixed contacts (13). The springs maintain the disconnected states of the main fixed contacts (13) and the main movable contacts (12). The coil movable contacts (4) and the coil fixed contacts (3) are arranged at the lower end of the inner-layer starting coils (5). When the low-voltage vacuum energy-saving normally-open direct-current contactor is started, a current directly enables the movable iron core (1) and the fixed iron core (8) to be attracted through the inner-layer starting coils (5), the coil movable contacts (4) and the coil fixed contacts (3) are disconnected through screws (2), and an upper cavity and a lower cavity are both vacuum space. According to the low-voltage vacuum energy-saving normally-open direct-current contactor, the current is reduced, electric energy consumption is saved, the temperature rising of the contactor is reduced, oxidation and burning loss caused by electric arcs to the contacts are reduced, and the service life of the contacts is prolonged.

Description

The energy-conservation D.C. contactor of often opening of low-voltage vacuum

Technical field

The present invention relates to the energy-conservation D.C. contactor of a kind of D.C. contactor, particularly low-voltage vacuum.

Background technology

The effect of D.C. contactor is by DC power supply, as storage battery, with DC load, as direct current machine, disconnects having electric in the situation that, and be a kind of product of maturation.But during existing D.C. contactor work, coil current maintains large electric current required while starting always, causes power consumption large, and temperature rise, can not adapt to temperature rise is required to strict workplace.

Summary of the invention

Technical problem to be solved:

During D.C. contactor work, coil current is large, temperature rise.During open circuit, reduce the electric current by load.

Technical scheme:

In order to realize above function, the invention provides the energy-conservation D.C. contactor of often opening of a kind of low-voltage vacuum, comprise main contacts binding post 15, main contacts binding post 15 bottoms are provided with main fixed contact 13, main fixed contact 13 belows are active contact 12, and moving contact 12 is separately positioned on the left and right sides of push rod; Push rod connects moving iron core 1 and static iron core 8 from top to bottom successively, moving iron core 1 upper end is fixed in the middle of the fixed head 10 of horizontal positioned, moving iron core 1 and static iron core 8 are outside equipped with coil rack 9, and internal layer actuating coil 5 is wrapped on coil rack 9, and coil rack 9 tops are fixed head 10;

Described fixed head 10 forms lower chamber with coil housing 7, and the structure that push rod, moving iron core 1, static iron core 8, coil rack 9 and internal layer actuating coil 5 form is placed in described lower chamber;

Described fixed head 10 forms upper cavity with contactor main body 16, and main contacts binding post 15, main fixed contact 13 are placed in described upper cavity with the structure that initiatively contact 12 forms;

It is characterized in that: also comprise spring, one of spring is arranged on the middle groove of contactor main body 16 vertical directions, and other end is connected with the top of push rod, and during power-off, spring maintains main fixed contact 13, active contact 12 off-states;

Also comprise that skin maintains pull-in winding 6, described internal layer actuating coil 5 is in skin maintains pull-in winding 6, and both are in the same direction on coil rack 9; The lower end of described internal layer actuating coil 5 is provided with coil moving contact 4 and coil fixed contact 3, and internal layer actuating coil 5 and skin maintain pull-in winding 6 and 3 coil moving contact 4 series connection of coil fixed contact; During startup, electric current directly makes iron core 1 and static iron core 8 adhesives by internal layer actuating coil 5, after moving iron core 1 and static iron core 8 adhesives, by the screw 2 connecting with moving iron core 1, make coil moving contact 4 and 3 disconnections of coil fixed contact, electric current maintains by internal layer actuating coil 5 and the skin of series connection the adhesive that pull-in winding 6 maintains moving iron core 1 and static iron core 8;

Described upper cavity and lower chamber are vacuum space.

The part contacting between described fixed head 10, main contacts binding post 15 and contactor main body 16 is respectively equipped with seal member.

Described seal member is rubber seal.

Seal member is added with fluid sealant outward.

Beneficial effect:

D.C. contactor provided by the invention, in blink after startup, disconnects coil moving contact 2 and coil fixed contact 3, has reduced by maintaining the electric current of moving iron core 1 and static iron core 8, has saved power consumption, has reduced contactor temperature rise.

Contact space keeps vacuum state, and contacting and disconnection are carried out in the vacuum with atmospheric isolation, and the electric arc having produced while having reduced due to the closing of contact, to the oxidation of contact and scaling loss, has extended the useful life of contact.

Accompanying drawing explanation

Fig. 1 is the main pseudosection of the present invention.

Fig. 2 is the left pseudosection of the present invention.

Fig. 3 is vertical view of the present invention.

Fig. 4 is that the present invention vacuumizes thin copper pipe and sealing cap and contactor main body part sectioned view.

Fig. 5 is actuating coil of the present invention, maintains pull-in winding and coil contact winding diagram.

In figure, 1-moves iron core, 2-screw, 3-coil fixed contact, 4-coil moving contact, 5-internal layer actuating coil, 6-skin maintains pull-in winding, 7-coil housing, 8-static iron core, 9-coil rack, 10-fixed head, 11-sealing rubber pad, 12-is contact initiatively, the main fixed contact of 13-, 15-main contacts binding post, 16-contactor main body, 17-coil power connector, 18-sealing cap, the thin copper pipe of 19-.

Embodiment

Below in conjunction with accompanying drawing, invention is further described:

Fig. 1 is schematic diagram of the present invention

The energy-conservation D.C. contactor of often opening, comprises main contacts binding post 15, and main contacts binding post 15 bottoms are provided with main fixed contact 13, and main fixed contact 13 belows are active contact 12, and moving contact 12 is separately positioned on the left and right sides of push rod; Push rod connects moving iron core 1 and static iron core 8 from top to bottom successively, moving iron core 1 upper end is fixed in the middle of the fixed head 10 of horizontal positioned, moving iron core 1 and static iron core 8 are outside equipped with coil rack 9, and internal layer actuating coil 5 is wrapped on coil rack 9, and coil rack 9 tops are fixed head 10;

Described upper cavity and lower chamber are vacuum space.

As shown in Fig. 1 Fig. 2 Fig. 3, structurally different with the D.C. contactor of prior art is that internal layer actuating coil 5 and skin maintain pull-in winding 6, and makes skin maintain coil fixed contact 3, the coil moving contact 4 of pull-in winding 6 short circuits.After moving iron core 1 and static iron core 8 adhesives, by the screw 2 connecting with moving iron core 1, coil moving contact 4 and coil fixed contact 3 are disconnected, make internal layer actuating coil 5 by series connection and skin maintain pull-in winding 6 operating currents and reduce, reduced power consumption, save the energy, reduced temperature rise.

Acting as of seal member seals coil housing 7 and internal layer actuating coil 5 and the outer space that maintains pull-in winding 6 and coil fixed contact 3 moving contacts 4, moving iron core 1, static iron core 8, fixed head 10, active contact 12, main fixed contact 13, main contacts binding post 15 and contactor main body 16 compositions completely, then with vacuum pump, by thin copper pipe 19, extract the air of contact space, after extracting air completes, with special vice, thin copper pipe is pressed from both sides to flat cut off and use sealing cap 18 and seal member sealing, making contact space is vacuum.Contact space keeps vacuum state, and contacting and disconnection are carried out in the vacuum with atmospheric isolation, has reduced the electric arc of generation while disconnecting due to contact to the oxidation of contact and scaling loss, has extended the useful life of contact.

For the effect of good sealing, seal member adopts rubber parts.Outside adds fluid sealant better effects if.

Claims

1. the energy-conservation D.C. contactor of often opening of low-voltage vacuum, comprise main contacts binding post (15), main contacts binding post (15) bottom is provided with main fixed contact (13), and main fixed contact (13) below is active contact (12), and moving contact (12) is separately positioned on the left and right sides of push rod; Push rod connects moving iron core (1) and static iron core (8) from top to bottom successively, moving iron core (1) upper end is fixed in the middle of the fixed head (10) of horizontal positioned, moving iron core (1) and static iron core (8) are outside equipped with coil rack (9), it is upper that internal layer actuating coil (5) is wrapped in coil rack (9), and coil rack (9) top is fixed head (10);

Described fixed head (10) forms lower chamber with coil housing (7), and the structure that push rod, moving iron core (1), static iron core (8), coil rack (9) and internal layer actuating coil (5) form is placed in described lower chamber;

Described fixed head (10) forms upper cavity with contactor main body (16), and main contacts binding post (15), main fixed contact (13) are placed in described upper cavity with the structure that initiatively contact (12) form;

It is characterized in that: also comprise spring, one of spring is arranged on the middle groove of contactor main body (16) vertical direction, and other end is connected with the top of push rod, during power-off, spring maintains main fixed contact (13), active contact (12) off-state;

Also comprise that skin maintains pull-in winding (6), described internal layer actuating coil (5) is in skin maintains pull-in winding (6), and both are in the same direction on coil rack (9); The lower end of described internal layer actuating coil (5) is provided with coil moving contact (4) and coil fixed contact (3), and internal layer actuating coil (5) and skin maintain pull-in winding (6) and coil fixed contact (3) coil moving contact (4) series connection; During startup, electric current directly makes iron core (1) and static iron core (8) adhesive by internal layer actuating coil (5), after moving iron core (1) and static iron core (8) adhesive, by the screw (2) connecting with moving iron core (1), coil moving contact (4) and coil fixed contact (3) are disconnected, electric current maintains by internal layer actuating coil (5) and the skin of series connection the adhesive that pull-in winding (6) maintains moving iron core (1) and static iron core (8);

Described upper cavity and lower chamber are vacuum space.

2. the energy-conservation D.C. contactor of often opening of a kind of low-voltage vacuum according to claim 1, is characterized in that: the part contacting between described fixed head (10), main contacts binding post (15) and contactor main body (16) is respectively equipped with seal member.

3. the energy-conservation D.C. contactor of often opening of a kind of low-voltage vacuum according to claim 2, is characterized in that: described seal member is rubber seal.

4. according to a kind of low-voltage vacuum direct current normally open contactor described in claim 2 or 3, it is characterized in that: seal member is added with fluid sealant outward.