CN201266585Y

CN201266585Y - Protection switch, especially electromagnetic release for fault current circuit breaker

Info

Publication number: CN201266585Y
Application number: CNU2008200569775U
Authority: CN
Inventors: 陈志贤; 郑永刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-03
Filing date: 2008-04-03
Publication date: 2009-07-01
Anticipated expiration: 2018-04-03

Abstract

The utility model relates to an electromagnetic release used for protecting a switch, particularly for protecting the switch of a fault current. The electromagnetic release works by a push rod (9) which is guided on a release cover (1), the push rod (9) leans on an armature (4) which is contained in the push rod (9) and is parallel and aligned with the polar surface of a magnetic yoke component. The release is characterized in that the push rod (9) and the armature (4) which is affected by a release spring (5) move along the edge abut against a support member (11) until hitting the cover.

Description

The magnetictrip that protection switch, particularly failure current protection switch are used

Technical field

The utility model relates to and a kind ofly is used for protection switch, especially for the magnetictrip of failure current protection switch; this magnetictrip carries out work by a push rod of guiding on the release housing, this push rod against one hold within it, with the armature of yoke assembly pole-face parallel alignment.The structure of the armature work by this outside swing can produce particularly advantageous operating characteristic.

Background technology

But then, armature and yoke assembly parallel alignment also highlight out the shortcoming part in machinery and configuration aspects.For example, the tolerance in the control air crack works, and therefore has influence on tripping characteristic.A kind of structure has like this become known (DE 3248208 A1).

The utility model content

The purpose of this utility model is to develop a kind of follow-on magnetictrip, this magnetictrip carries out work by a push rod of guiding on the release housing, this push rod against one hold within it, with the armature of yoke assembly pole-face parallel alignment, and the easy machine work of this armature working face.

The technical scheme that realizes above-mentioned purpose is, in the magnetictrip of aforementioned type, armature is processed into arc, only processes the plane that armature contacts with yoke assembly during machine work, can well guarantee the flatness of armature working face like this.

Design of the present utility model can obtain implementing easily, its implementing measure is, when cold stamping, armature is struck out arc, in the postorder grinding, grinding face diminishes, two parts before and after dividing, in grinding process, the working face deflection is little, flatness is guaranteed, and it is stable to help the magnetictrip operating characteristic.Dropout spring one meshing point is positioned on the center line of armature rear end, another meshing point is fixed in the supporting member circular hole, and under the effect of dropout spring, armature is along doing circular motion with supporting member by the edge of a knife position in jail, armature drives push rod, and push rod moves in the case guide hole.

The fixed form of magnetic conductor and permanent magnet, processing cost increases as adopting the laser spot welding mode to weld then, and difficulty of processing is very big, and the localized hyperthermia in the course of processing causes irreversible damage to the magnetic property of permanent magnet and magnetic conductor, has influence on tripping characteristic.A kind of structure has like this become known (DE 3248208 A1).

The utility model adopts the riveted joint mode, and magnetic conductor, permanent magnet and supporting member are fixed, and easy to process, processing cost is low, and the riveted joint parameter is easily adjusted.

Adopt cirque structure as permanent magnet, then can promote simplification and the accurate dropout performance made.

Carry out dustless sealing as the release shell, can promote the accuracy and the lasting reliability of magnetictrip.For this reason, the perforation of establishing of the lead-in wire for the tripping coil of electromagnetic system of release housing is favourable by sealing up at sealing device on the connecting line or on shell.

Description of drawings

Below by the embodiment sets forth in detail the utility model that schematically illustrates in the accompanying drawing, in the accompanying drawings

Fig. 1 is the end view of release under the release shell open mode, armature and yoke is shown fits, and is promptly outer in "on" position;

Fig. 2 illustrates armature motion, drives the push rod action, and is promptly outer in trip status;

Fig. 3 is the vertical view of release under the release shell open mode;

Fig. 4 is to use the fundamental diagram of magnetictrip.

Embodiment

Magnetictrip among the embodiment shown in Figure 1 carries out work by the push rod 9 of a guiding on release housing 1, this push rod 9 against one hold within it, with the armature 4 of yoke assembly pole-face parallel alignment, the armature 4 of the push rod 9 and spring 5 effects of being threaded off is to move near the limit of supporting member 11, till running into case, motion state as shown in Figure 2.Under the situation in being contained in failure current protection switch; when breaking down electric current; fault current checkout gear 13 is adorned detected fault-signal and is produced demagnetizing field by secondary circuit 14 through the coil 8 of magnetictrip 15; armature 4 discharges under the effect of dropout spring 5; and when failure current protection switch closes a floodgate again; by mechanism, armature 4 is fitted on the pole-face 3 of magnetic conductor once more.Big motoricity can be avoided occurring in little control air crack between armature and the magnetic conductor, thereby can protect the binding face between armature and the magnetic conductor, and therefore the tripping characteristic of magnetictrip is maintained a good state for a long time.

Magnetic conductor 3, armature 4, spring 5 and permanent magnet 6 are formed electromagnetic system, and electromagnetic system integral body is encased in the case.Permanent magnet 6 forms magnetic loop through magnetic conductor 3 and armature 4, produces suction, and armature 4 is fitted in magnetic conductor work pole-face 3, dropout spring 5 one meshing points circular hole 4 on the armature center line, and another meshing point is fixed in supporting member.Like this, it is to shrink by spring that armature discharges, and the power of dropout spring constantly reduces, so reset force becomes evenly, makes machinery can design more lightly, thereby the magnetic action face of armature 4 and magnetic conductor pole-face 3 are protected.

Yoke assembly is designed to be fixed in the seal cavity of case 1 and lid 2 compositions, when armature 4 discharges, drives push rod 9 motions, and the engagement of case and lid is wanted to bear the reaction force that the dropout motion is brought.

Main circuit 12 shown in Figure 4, fault current checkout gear 13 passes main circuit, and secondary winding 14 goes between mutually with the coil 8 of magnetictrip 15.

It is favourable that the release housing is made dust-proof sealing structure.Preferably install coil 8 holes that go between with respect to the release housing seal.In the embodiment shown, release housing 1 caves inward at the position, hole that passes of coil 8 lead-in wires, so that coil 8 lead-in wires can be drawn in the bending of the position of the outer surface of release housing according to the bending radius that its material allows.This magnetictrip of the present utility model will be a kind of very little structure that takes up space.

Claims

1, a kind ofly be used for protection switch, especially for the magnetictrip of failure current protection switch; this magnetictrip is gone up the push rod (9) of guiding by one at release housing (1) and is carried out work; this push rod (9) against one hold within it, with the armature (4) of yoke assembly pole-face parallel alignment; it is characterized in that; push rod (9) moves with the limit near supporting member (11) with the armature (4) of spring (5) effect of being threaded off, till running into case.

According to the described magnetictrip of claim 1, it is characterized in that 2, case (1) and lid (2) cooperate forms an airtight space.

3, according to one of in the claim 1 to 2 described magnetictrip, it is characterized in that, armature (4) forms a meshing point (4 ｀) of establishing for dropout spring (5) on an arm, this meshing point (4 ｀) shrinks dropout spring (5) by disconnecting motion, and dropout spring another meshing point (5) and supporting member maintains static.

4, according to one of in the claim 1 to 3 described magnetictrip, it is characterized in that armature (4) is arc, its face that contacts with yoke assembly is on a horizontal plane.

According to one of in the claim 1 to 4 described magnetictrip, it is characterized in that 5, magnetic conductor (3) is by case (1) and cover (2) and be fixed motionless.

6, according to one of in the claim 1 to 5 described magnetictrip, it is characterized in that coil (8) passes the upright center arm of magnetic conductor (3), and the lead-in wire of coil passes in the aperture of case (1) and lid (2) composition.

According to one of in the claim 1 to 6 described magnetictrip, it is characterized in that 7, magnetic conductor (3), permanent magnet (6) and supporting member (11) are riveted by rivet (10).