CN201282065Y

CN201282065Y - Permanent magnet AC vacuum contactor

Info

Publication number: CN201282065Y
Application number: CNU2008200603193U
Authority: CN
Inventors: 朱平远
Original assignee: SHANGHAI ZHIYUAN YACUUM ELECTRIC CO LTD
Current assignee: SHANGHAI ZHIYUAN YACUUM ELECTRIC CO LTD
Priority date: 2008-06-26
Filing date: 2008-06-26
Publication date: 2009-07-29
Anticipated expiration: 2018-06-26

Abstract

The utility model discloses a permanent magnetism AC vacuum contactor, and belongs to the field of electric switches. The permanent magnetism AC vacuum contactor comprises a base, a vacuum extinction chamber, a lever, an L-shaped field yoke, an iron core, a coil, an armature, a metal conduit and a pressure spring. The vacuum extinction chamber is arranged in the base; a patch panel and the vacuum extinction chamber are fixed on the base through a connecting plate; the lever is fixed on the base through a shaft; a moving contact of the vacuum extinction chamber passes through a hole on the lever; the metal conduit is connected with one end of the lever; the L-shaped field yoke is arranged on the base; the iron core is mounted on the field yoke; and the armature is mounted on the lever. The utility model has reasonable design and small size, and is a monopole low voltage AC vacuum contactor which can be used conveniently.

Description

The permanent magnet AC vacuum contactor

Technical field:

The utility model permanent magnet AC vacuum contactor belongs to the electric switch field, particularly a kind of permanent magnet AC vacuum contactor.

Background technology:

Existing permanent magnet AC vacuum contactor volume is big, and useful life is short, particularly in operation frequently, under the situation of running, needs during replacing to stop production continuously, uses inconvenience, is not suitable for the needs in market.

The utility model content:

In order to solve deficiency of the prior art, the utility model provides the permanent magnet AC vacuum contactor that a kind of volume is little, the life-span long, need not to change.

The technical scheme that the utility model adopted is as follows: the permanent magnet AC vacuum contactor, and its structure comprises: parts such as the yoke of vacuum interrupter, radome, bellows, change over contact, pedestal, bolt, lever, L type, iron core, coil, armature, compression spring; Vacuum interrupter is set in the pedestal, the connecting plate that terminal block is housed is on the fixed contact of vacuum interrupter, terminal block and vacuum interrupter are fixed on the pedestal by connecting plate, on the moving contact of vacuum interrupter, be connected with the lead that links to each other with another terminal block, lever is fixed on the pedestal by axle, the moving contact of vacuum interrupter passes the hole on the lever, end at lever connects metal catheter, metal catheter is enclosed within on the guide rod, compression spring is enclosed within on metal catheter and the guide rod, adjustment screw withstands on the guide rod, the yoke of L type is set on pedestal, and iron core is installed on the yoke, is enclosed within coil on iron core, armature is installed on the lever, the moving contact of vacuum interrupter and fixed contact are sealed in by cylinder, and in the vacuum chamber that insulating case and lid are formed, radome covers the contact of moving contact and fixed contact, bellows is connected on the radome, and axle sleeve is enclosed within on the movable contact rod.

When coil applies voltage, the moving armature of inhaling unshakable in one's determination, armature drives lever and sways, one end of lever promotes metal catheter, the compression pressure spring, lever discharges the moving contact of vacuum interrupter, self-closing power by vacuum interrupter makes fixed contact and moving contact closure, connect main circuit, electric current is through terminal block, connecting plate, fixed contact, moving contact, lead, another terminal block, when loss of voltage that applies when coil or the magnetic force that is produced are not enough, the armature that discharges unshakable in one's determination, compression spring promotes metal catheter, the end that metal catheter promotes lever sways, lever promotes the moving contact of vacuum interrupter when swaying, make the fixed contact and the moving contact disjunction of vacuum interrupter, and the electric arc that produces in connection and disjunction circuitry processes is in vacuum interrupter, because the characteristic that vacuum has, electric arc moment extinguishes, and can not leak, and is safe and reliable.

On pedestal, be provided with a change over contact, on lever, be provided with a bolt, the armature that discharges unshakable in one's determination, the junction closure of change over contact, when armature drive lever swayed, bolt disconnected the contact of change over contact, make province's electric device access control circuit, realize requirements of saving energy.

The utility model is not when working, and dynamic and static contact is in release condition, and as giving coil electricity, iron core will produce magnetic field, make probe of contactor from the off-position to the attracted position fast moving, the while has also stored energy for the release of moving contact.In a single day produce electric arc between the contact, the electromagnetism gap smaller, at this moment permanent magnetism power will increase severely, sucting speed is accelerated (pickup time is less than 20ms), thereby the ablation when having significantly reduced the contact adhesive, permanent magnetism power keep contact pressure moment constant after making the contact adhesive, are not subjected to the influence of voltage fluctuation, even if to depress the adhesive contact also be one-time action facing dielectric, contact is chatter not.After the probe of contactor adhesive, current control module is the current cut-off of sucking coil, this moment coil do not work, not power consumption, the electric current of coil is zero, no energy consumption, coil can not generate heat, and can not burn, and relies on permanent magnetism power that contact is remained on attracting state fully at this moment.The electric energy that stores during adhesive just can pass to reverse current to coil, make the mutual expelling force that produces same polarity magnetic field between iron core and the static iron core, and the permanent-magnetic AC contact contact is discharged with the retracting spring acting in conjunction, release energy this moment is the several times of traditional electromagnetic AC contactor, rate of release is electromagnetic AC contactor 3-5 doubly (less than 18ms), the burning time of electric arc between contact when having reduced release effectively.When control voltage when being higher than the assigned voltage value, both made voltage fluctuation also can not have influence on confining force between dynamic and static contact, contact equally can chatter, the phenomenon of having avoided contact to be burnt fully.

Owing to adopted structures such as L type yoke and permanent magnetic operating, the utlity model has following beneficial effect: volume is little, safe and reliable, easy to use, advantages such as energy saving.

Description of drawings:

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

Fig. 2 is the schematic top plan view of the utility model accompanying drawing 1;

Fig. 3 is the schematic side view of the utility model accompanying drawing 1;

Fig. 4 is a vacuum arc extinguish chamber structure schematic diagram of the present utility model;

Fig. 5 is a lever construction schematic diagram of the present utility model;

Fig. 6 is a change over contact structural representation of the present utility model.

Embodiment:

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

As Fig. 1, Fig. 2, shown in Figure 3, the utility model is by housing 19, pedestal 1, vacuum interrupter 50, terminal block 2, lever 51, the yoke 8 of L type, unshakable in one's determination 9, coil 10, armature 11, metal catheter 12, guide rod 13, compression spring 14 is formed, vacuum interrupter is set in pedestal, the connecting plate 3 that terminal block 2 is housed is connected on the fixed contact of vacuum interrupter, terminal block and vacuum interrupter are fixed on the pedestal by terminal block 3, on the moving contact of vacuum interrupter, be connected with the lead that is connected 4 with another terminal block 5, lever 6 is fixed on the pedestal, screw is connected lever with axle, the moving contact of vacuum interrupter passes the hole on the lever, end at lever connects metal catheter 12, metal catheter 12 is enclosed within on the lever 13, compression spring 14 is enclosed within on metal catheter and the guide rod, adjustment screw 15 withstands on the guide rod, round boss 36 on lever is long-armed cooperates with metal catheter, and the kind yoke 8 of L type is set on pedestal, and unshakable in one's determination 9 are installed on the yoke, on iron core, be with coil 10, armature 11 is installed on the lever, is provided with a change over contact 17 on pedestal, is provided with a bolt on lever, when coil applies voltage, the moving armature of inhaling unshakable in one's determination, armature drives lever and sways, and an end of lever promotes metal catheter, the compression pressure spring, lever discharges the moving contact of vacuum interrupter, makes the fixed contact and the moving contact closure of vacuum interrupter, connects main circuit, when armature drive lever sways, bolt is the contact disjunction of change over contact, when the loss of voltage that applies when coil or the magnetic force of generation are not enough, and the armature that discharges unshakable in one's determination, compression spring promotes metal catheter, the end that metal catheter promotes lever sways, and lever promotes the moving contact of vacuum interrupter when swaying, the fixed contact of vacuum interrupter is separated with moving contact, main circuit disconnects, the junction closure of change over contact 17.

As shown in Figure 4, the moving contact of vacuum interrupter 50 of the present utility model and fixed contact 21 are sealed in by cylinder 23, in the vacuum chamber that insulating case 24 and lid 26 are formed, radome 27 covers the contact of moving contact and fixed contact, bellows 28 is connected on the radome, axle sleeve 29 is enclosed within on the movable contact rod, the connecting plate that terminal block is housed is connected on the fixed contact of vacuum interrupter, terminal block and vacuum interrupter are fixed on the pedestal by connecting plate, on the moving contact of vacuum interrupter, be connected with the lead that is connected with another terminal block, lever sways, and promotes or the release moving contact, makes fixed contact and the eastern contact closure or the disjunction of vacuum interrupter.

As shown in Figure 5, lever 51 of the present utility model is to be made by high-intensity flame retardant plastics, hole 31 is to be used for installation shaft 6, by screw hole 32 axle and lever are fixed, the galianconism of lever connects armature, hole 33 fixed armatures, lever long-armed porose 34 and cooperated with the moving contact of vacuum interrupter, round boss 36 on lever is long-armed cooperates with metal catheter, is provided with a bolt hole 35 on lever, and the bolt of installation is used for the closure and the disconnection of control transformation contact.

As shown in Figure 6, of the present utility modelly on pedestal, be provided with a change over contact 17, on lever 51, be provided with a bolt 41, when adhesive armature unshakable in one's determination, bolt hits push rod, push rod 42 disconnects the contact of change over contact, armature, the junction closure of change over contact of discharging unshakable in one's determination, when armature drive lever sways, bolt disconnects the contact of change over contact, makes province's electric device access control circuit, realizes requirements of saving energy.

Claims

1. the utility model discloses a kind of permanent magnet AC vacuum contactor, its structure comprises: vacuum interrupter, radome, bellows, change over contact, pedestal, bolt, lever, the yoke of L type, unshakable in one's determination, coil, armature, metal catheter, the compression spring parts, vacuum interrupter is set in the pedestal, terminal block and vacuum interrupter are fixed on the pedestal by connecting plate, lever is fixed on the pedestal by axle, the moving contact of vacuum interrupter passes the hole on the lever, end at lever connects metal catheter, the yoke of L type is set on pedestal, iron core is installed on the yoke, and armature is installed on the lever.

2. permanent magnet AC vacuum contactor according to claim 1, it is characterized in that: the moving contact of vacuum interrupter and fixed contact are sealed in the vacuum chamber of being made up of cylinder, insulating case and lid, radome covers the joint of moving contact and fixed contact, bellows is connected on the radome, and axle sleeve is enclosed within on the movable contact rod.

3. permanent magnet AC vacuum contactor according to claim 1 is characterized in that: pedestal is provided with a change over contact, is provided with a bolt on lever.