CN103762130B

CN103762130B - Breaker

Info

Publication number: CN103762130B
Application number: CN201310737138.5A
Authority: CN
Inventors: 管瑞良; 刘洪武; 张洵初; 王云峰; 王炯华
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2013-12-27
Filing date: 2013-12-27
Publication date: 2017-11-28
Anticipated expiration: 2033-12-27
Also published as: CN103762130A

Abstract

A kind of breaker, including shell and the static contact component that is located in shell（1）, arc-chutes（3）, the static contact component（1）Including static contact（12）；It is characterized in that：The static contact component（1）Also include a run-on tab（11）, the run-on tab（11）Including with static contact（12）The root of electrical connection（113）, away from static contact（12）And extend to arc-chutes（3）Interior head（111）, and connection root（113）With head（111）And covered with an arc insulating cover（14）Pars intermedia（112）, run-on tab is formed from root (113) to the direction of head (111)（11）Length direction, the arc insulating cover（14）Including the first sidepiece（141）With the second sidepiece（142）, the first sidepiece（141）With the second sidepiece（142）Along run-on tab（11）Length direction or so is arranged in the both sides of pars intermedia (112), the first sidepiece（141）With the second sidepiece（142）Between gap（L1）Less than pars intermedia（112）Width（L2）.

Description

Breaker

Technical field

The present invention relates to low-voltage electrical apparatus, and in particular to a kind of breaker.

Background technology

The static contact of existing breaker of plastic casing includes conducting rod and silver contact made of silver-plated copper billet and formed, in open circuit When device cut-offs, the dynamic and static contact reprimand of the contact apparatus of breaker of plastic casing can produce electric arc when holding, because the contact of moving contact is moved Route is in the cavity volume of the arc extinguishing grid pieces of arc-control device, therefore electric arc enters arc extinguishing grid pieces under electrodynamic action, and electric arc is cut Into a series of short arc of series connection, electric arc is attenuated and quickly improve arc voltage, so as to have the function that arc extinguishing.In this process In, can electric arc quickly extinguish as key.So in order to reach safer purpose, existing breaker must be towards more The direction for quickly extinguishing electric arc is developed.

The content of the invention

It is an object of the invention to provide a kind of breaker, to improve the fast arc extinction ability of breaker.

To reach above-mentioned purpose, the technical solution adopted by the present invention is：A kind of breaker, including shell and it is located at shell In static contact component, arc-chutes, the static contact component includes static contact；The static contact component also includes a run-on tab, Root, remote static contact and the head extended in arc-chutes that the run-on tab includes electrically connecting with static contact, and connection root Portion and head and covered with the pars intermedia of an arc insulating cover, the length direction of run-on tab is formed from root to the direction on head, should be every Arc cover includes the first sidepiece and the second sidepiece, and the first sidepiece and the second sidepiece are arranged in pars intermedia along run-on tab length direction or so Both sides, gap L 1 between the first sidepiece and the second sidepiece is less than the width L2 of pars intermedia.

In such scheme, the arc insulating cover also includes the first connecting portion for connecting first sidepiece and the second sidepiece, peace Put below run-on tab, be respectively equipped between first connecting portion and the first sidepiece and the second sidepiece along run-on tab length direction Elongated slot, two elongated slots form the receiving cavity for accommodating the run-on tab, and the run-on tab is in the receiving cavity of arc insulating cover.

In such scheme, the arc insulating cover also includes the second connecting portion for connecting first sidepiece and the second sidepiece, institute The second connecting portion stated is arranged on head side, and wraps up the head of run-on tab.

In such scheme, the opposite face of first sidepiece and the second sidepiece is set respectively at the root close to run-on tab There are the first inclined-plane and the second inclined-plane, the gap between the first sidepiece and the second sidepiece opposite face is formed loudspeaker towards one end of static contact Mouth.

In such scheme, first sidepiece and the second sidepiece are less than the head of run-on tab in the gap between head Portion is in the width L3 close to one end at arc insulating cover.

In such scheme, the static contact is into U-shaped；The static contact component also include support member and with support member clamping Support, the support member and support are arranged on the lower section of run-on tab, i.e., the U-shaped intracavitary that static contact and run-on tab are formed.

In such scheme, the arc-chutes are provided with one group of arc extinguishing grid pieces of uniform intervals arrangement and are arranged on one group of arc-chute Striking grid at the top of piece, the two striking grid angles inner side of the striking grid are provided with insulating trip.

The action principle and effect of the present invention：

（1）The present invention in use, when have short circuit current by when, moving contact reprimand is opened, and static contact electric arc arc root is along run-on tab Move and contacted with arc insulating cover, arc insulating cover produces gas and electric arc arc root is cooled down, simultaneously because the first sidepiece of arc insulating cover And the second gap L 1 between sidepiece is less than the width L2 of run-on tab, and arc root is limited within L1 width, makes local current Density improves, so as to strengthen driving force of the magnetic field to electric arc.

（2）The further effect of the present invention, when electric arc arc root enters from the pars intermedia of run-on tab the head zone of run-on tab When, the width L3 of the head of run-on tab close to arc insulating cover one end is more than the gap L 1 between the first sidepiece and the second sidepiece, electric arc Arc root extends from original be limited in L1 width to both sides so that the electric arc electricity in the head zone unit area of run-on tab Current density reduces, and electric arc is easier to stop in the head zone of run-on tab, and suppresses electric arc arc root and go back, while arc insulating cover Producing gas makes arc extinguishing intraventricular pressure increase by force, and electric arc more rapidly enters and split in arc extinguishing grid pieces and quickly extinguished.

Brief description of the drawings

Fig. 1 is the structural representation of static contact component in the embodiment of the present invention；

Fig. 2 is the decomposition explosion schematic diagram of static contact component in the embodiment of the present invention；

Fig. 3 is the static contact component top view of the embodiment of the present invention；

Fig. 4 is the main composition part decomposing schematic representation of the embodiment of the present invention；

Fig. 5 is the structural representation of striking grid in the embodiment of the present invention；

Fig. 6 is the structural representation of the embodiment of the present invention.

In the figures above：1st, static contact component；11st, run-on tab；111st, head；112nd, pars intermedia；113rd, root；12nd, it is quiet Contact；121st, silver contact；122nd, U-shaped chamber；123rd, U-shaped face；13rd, connecting plate；14th, arc insulating cover；141st, the first sidepiece；1411st, One inclined-plane；1412nd, end face；142nd, the second sidepiece；1421st, the second inclined-plane；1422nd, end face；143rd, receiving cavity；144th, first connects Socket part；145th, second connecting portion；15th, support member；151st, fixture block；16th, support；161st, neck；17th, flash barrier；18th, insulation sleeve Pipe；2nd, moving contact component；21st, moving contact；3rd, arc-chutes；31st, arc separating wall；32nd, insulation board；33rd, striking grid；331st, striking grid Angle；3311st, hole；332nd, insulating trip；34th, arc extinguishing grid pieces.

Embodiment

Below in conjunction with the accompanying drawings and embodiment the invention will be further described：

Embodiment：Referring to shown in Fig. 1-6：

A kind of breaker, including shell and the static contact component 1, moving contact component 2, the arc-chutes 3 that are located in shell, institute Being arranged on shell for the rotation of moving contact component 2 stated coordinates with static contact component 1, and described moving contact component 2 includes dynamic touch First 21, the static contact component 1 includes connecting plate 13, static contact 12, run-on tab 11, support member 15, support 16 and flash barrier 17, The connecting plate 13 is electrically connected with main circuit；The static contact 12 electrically connects into U-shaped, its lower end with connecting plate 13, its upper end Electrically connected with one end of run-on tab 11, run-on tab 11 is made up of head 111, pars intermedia 112 and root 113, from root 113 to the end The direction in portion 111 forms the length direction of run-on tab 11, and direction vertical with the length direction on run-on tab 11 is striking The width of plate 11, the root 113 are electrically connected with static contact 12, and the width and static contact at place are electrically connected with static contact 12 12 width is the same, and the head 111 is away from static contact 12 and extends in arc-chutes 3, and preferable shape is T-shaped, and to going out The contract of arc chamber 3, the pars intermedia 112 connect root 113 and head 111, and thereon covered with an arc insulating cover 14.It is described every Arc cover 14 is preferably the high polymer dielectric materials of aerogenesis.The arc insulating cover 14 includes the first sidepiece 141, the second sidepiece 142 and connected Connect the first connecting portion 144 and second connecting portion 145 of the first sidepiece 141 and the second sidepiece 142, the first sidepiece 141 and the second side Portion 142 is arranged in the both sides of pars intermedia 112 along length direction of run-on tab 11 or so, between the first sidepiece 141 and the second sidepiece 142 Gap L 1 be less than run-on tab 11 width L2.Also, the sidepiece 141 of first connecting portion 144 and first and the second sidepiece 142 it Between be respectively equipped with elongated slot along the length direction of run-on tab 11, two elongated slots form the receiving cavity 143 for accommodating the run-on tab 11, The run-on tab 11 is in the receiving cavity 143 of arc insulating cover 14.The first connecting portion 144 is arranged under run-on tab 11 Side；Described second connecting portion 145 is arranged on the side of head 111, and wraps up the head 111 of run-on tab 11.

The support member 15 and support 16 are arranged on the lower section of run-on tab 11, i.e., the U that static contact 12 and run-on tab 11 are formed In shape chamber 122.The 161 mutual clamping of neck of the fixture block 151 and support 16 of support member 15, and fastener is used by insulating sleeve 18 It is fixedly mounted on static contact 12, described support member 15 can effectively prevent the deformation of static contact, and support 16 can be effectively blocked Electrical arc erosion connecting plate 13, extend the life-span of connecting plate 13.

It is in " ┐ " shape that the flash barrier 17, which is preferably shaped as, its one end by being located on the U-shaped face 123 of static contact 12, and Envelope U-shaped face 123, the other end is placed on shell, positioned at static contact 12 and moving contact component 2 between the two, it is described every Arc plate 17 is preferably gas exhausted material, while aerogenesis, more can effectively prevent electric arc from entering the scaling loss moving contact group of moving contact component 2 Part 2.

As shown in Fig. 3, Fig. 4 and Fig. 5, arc-chutes 3 are installed on static contact component 1, are gone out by one group of uniform intervals arrangement Arc grid 34 and the striking grid 33 being arranged at the top of one group of arc extinguishing grid pieces 34 and the riveting of left and right sides arc separating wall 31 form, in arc extinguishing The inside both sides of room 3 are symmetrically arranged with insulation board 32, and insulation board 32 is preferably gas exhausted material.Near quiet in one group of arc extinguishing grid pieces 34 The upper surface of one arc extinguishing grid pieces 34 of contact assembly 1 and the sidepiece 142 of the first sidepiece 141 and second is pressed close to；Described striking Insulating trip 332 is had additional on two striking grid angles 331 of grid 33, the insulating trip 332 passes through the riveting of hole 3311 on striking grid angle 331 It is connected on striking grid 33, insulating trip 332 is preferably gas exhausted material.

As shown in Figure 1, Figure 2, Figure 3 shows, the sidepiece 142 of the first sidepiece 141 and second is distinguished close to one end of root 113 The first inclined-plane 1411 and the second inclined-plane 1421 are provided with, makes gap between the first sidepiece 141 and the second sidepiece 142 towards root 113 one end forms horn mouth.The sidepiece 142 of first sidepiece 141 and second is less than in the gap between head 111 The head 111 of run-on tab 11 is in the width L3 close to one end at arc insulating cover 14.As shown in figure 3, preferably in first side The sidepiece 142 of portion 141 and second is respectively arranged with first end face 1412 and second end face at the head 111 of run-on tab 11 1422, width L3 of the run-on tab 11 at first end face 1412 and second end face 1422 is more than first end face 1412 and second end face Gap between 1422.

When have short circuit current by when, moving contact 21 and static contact 12 reprimand are opened.The electric arc arc root of static contact 12 is along run-on tab 11 Move and contacted with the first sidepiece 141 of arc insulating cover 14 and the second sidepiece 142, arc insulating cover 14 produces gas and electric arc arc root is carried out Cooling, while arc insulating cover 14 produces gas and increases pressure in arc-chutes 3, the first inclined-plane 1411 and the second inclined-plane 1421 are to electric arc Motion form guiding, pilot arc more rapidly enters arc-chutes 3, the first sidepiece 141 additionally, due to arc insulating cover and the Gap L 1 between two sidepieces 142 is less than the width L2 of run-on tab, and electric arc arc root diameter will be compressed into the range of L1, enhancing limit Flow effect.The scheme more optimized is electric arc arc root by after the gap L 1 of the first sidepiece 141 and the second sidepiece 142, electric arc arc root Increase with the contact area of arc insulating cover 14, therefore the head for resting on run-on tab that electric arc arc root will be stable, electric arc quilt more rapidly Arc extinguishing grid pieces 34 are split and quickly extinguished.

The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention The equivalent change or modification that Spirit Essence is made, it should all be included within the scope of the present invention.

Claims

1. a kind of breaker, including shell and the static contact component that is located in shell（1）, arc-chutes（3）, the static contact group Part（1）Including static contact（12）；It is characterized in that：The static contact component（1）Also include a run-on tab（11）, the run-on tab （11）Including with static contact（12）The root of electrical connection（113）, away from static contact（12）And extend to arc-chutes（3）Interior head （111）, and connection root（113）With head（111）And covered with an arc insulating cover（14）Pars intermedia（112）, from root (113) Run-on tab is formed to the direction of head (111)（11）Length direction, the arc insulating cover（14）Including the first sidepiece（141）With second Sidepiece（142）, the first sidepiece（141）With the second sidepiece（142）Along run-on tab（11）Length direction or so is arranged in pars intermedia (112) both sides, the first sidepiece（141）With the second sidepiece（142）Between gap（L1）Less than pars intermedia（112）Width （L2）；The arc insulating cover（14）For the high polymer dielectric materials of aerogenesis.

2. breaker according to claim 1, it is characterised in that：The arc insulating cover（14）Also include connecting first sidepiece （141）With the second sidepiece（142）First connecting portion（144）, the first connecting portion（144）It is arranged on run-on tab（11）Under Side, in first connecting portion（144）With the first sidepiece（141）With the second sidepiece（142）Between be respectively equipped with along run-on tab（11）It is long The elongated slot in direction is spent, two elongated slots are formed for accommodating the run-on tab（11）Receiving cavity（143）, the run-on tab（11）Set In arc insulating cover（14）Receiving cavity（143）In.

3. breaker according to claim 1, it is characterised in that：The arc insulating cover（14）Also include connecting first sidepiece （141）With the second sidepiece（142）Second connecting portion（145）, described second connecting portion（145）It is arranged on head（111）One Side, and wrap up run-on tab（11）Head（111）.

4. breaker according to claim 1, it is characterised in that：First sidepiece（141）With the second sidepiece（142）Phase Opposite is close to run-on tab（11）Root（113）Place is respectively arranged with the first inclined-plane（1411）With the second inclined-plane（1421）, make First sidepiece（141）With the second sidepiece（142）Gap between opposite face is towards static contact（12）One end formed horn mouth.

5. breaker according to claim 1, it is characterised in that：First sidepiece（141）With the second sidepiece（142）By Nearly head（111）Between gap be less than run-on tab（11）Head（111）Close to arc insulating cover（14）Locate the width of one end （L3）.

6. breaker according to claim 1, it is characterised in that：The static contact（12）Into U-shaped, the static contact component （1）Also include support member（15）With with support member（15）The support of clamping（16）, the support member（15）And support（16）Set In run-on tab（11）Lower section, i.e. static contact（12）And run-on tab（11）The U-shaped chamber of formation（122）It is interior.

7. breaker according to claim 1, it is characterised in that：The arc-chutes（3）One group provided with uniform intervals arrangement Arc extinguishing grid pieces（34）Be arranged on one group of arc extinguishing grid pieces（34）The striking grid at top（33）, the striking grid（33）Two strikings Grid angle（331）Inner side is provided with insulating trip（332）.