CN204558405U - A kind of circuit breaker - Google Patents

Abstract

The utility model provides a kind of circuit breaker, comprises Shell of circuit breaker and arc extinguishing grid pieces; Described Shell of circuit breaker has the cavity volume holding described arc extinguishing grid pieces; Described cavity volume sidewall has guide vane end stop, and described guide vane end stop contacts with described arc extinguishing grid pieces, and the base of described guide vane end stop is connected with the sidewall of described cavity volume; Between the sidewall of described cavity volume and described arc extinguishing grid pieces, there is hollow region; Described Shell of circuit breaker also has the first through hole, and described hollow region is communicated with described first through hole.At cavity volume sidewall, guide vane end stop is set, the position-limiting action of guide vane end stop is utilized to fix arc extinguishing grid pieces, and hollow region is set between sidewall and arc extinguishing grid pieces, the high-temperature gas that arc extinguishing grid pieces arc extinguishing produces is discharged outside to by hollow region and the first through hole, heat is scattered and disappeared fast, reduces high temperature to the destruction of Shell of circuit breaker.

Description

A kind of circuit breaker

Technical field

The utility model relates to distribution technique field, particularly a kind of circuit breaker.

Background technology

Circuit breaker, also become automatic air-break switch, be the electric current that can close, carry and cut-off under normal loop condition and can close, the switching device of carrying and the electric current under cut-offfing abnormal loop condition in official hour.When the electric equipment heavy overload in circuit, short circuit or under-voltage time, circuit breaker can automatic shutdown circuit, plays the effect of protection electric equipment.According to the difference of range of application, circuit breaker can be divided into low-voltage circuit breaker and primary cut-out, and its Low Voltage Circuit Breaker is widely used in low-voltage distributing line.

The electric arc that circuit breaker produces in open circuit process is drawn into arc extinguishing grid pieces under the influence of a magnetic field, is divided into some short arcs by arc extinguishing grid pieces, and the heat also absorbing electric arc by producing cathode effect in a large number makes arc extinction.

Existing circuit breaker generally arranges arc extinguishing grid pieces cavity volume when housing injection mo(u)lding, and arc extinguishing cavity volume is except arranging except opening at arc striking component and arc separating wall place, and other positions are closed-loop layout.Such vibrational power flow, all-in-one-piece cavity volume has intercepted the circulation of air in arc extinguishing grid pieces, the high temperature air of arc extinguishing generation and the heat of arc extinguishing grid pieces itself are difficult to be discharged by chamber wall on the one hand, on the other hand under high temperature action, particularly repeatedly continuously under arc extinguishing effect, high temperature in arc extinguishing grid pieces may make chamber wall melt distortion, causes the damage of whole circuit breaker, need change circuit breaker.

Utility model content

The cavity volume holding arc extinguishing grid pieces for solving existing circuit breaker adopts enclosed construction, after making arc extinguishing grid pieces arc extinguishing, heat can not be discharged as early as possible and may be caused that chamber wall is out of shape, problem that circuit breaker is damaged, the utility model provide a kind of there is the cavity volume making arc extinguishing grid pieces can the circuit breaker of conducting outside air.

The utility model provides a kind of circuit breaker, comprises Shell of circuit breaker and arc extinguishing grid pieces; Described Shell of circuit breaker has the cavity volume holding described arc extinguishing grid pieces;

Described cavity volume sidewall has guide vane end stop, and described guide vane end stop contacts with described arc extinguishing grid pieces, and the base of described guide vane end stop is connected with the sidewall of described cavity volume;

Between the sidewall of described cavity volume and described arc extinguishing grid pieces, there is hollow region;

Described Shell of circuit breaker also has the first through hole, and described hollow region is communicated with described first through hole.

At cavity volume sidewall, guide vane end stop is set, the position-limiting action of guide vane end stop is utilized to fix arc extinguishing grid pieces, and hollow region is set between sidewall and arc extinguishing grid pieces, the high-temperature gas that arc extinguishing grid pieces arc extinguishing produces is discharged outside to by hollow region and the first through hole, heat is scattered and disappeared fast, reduces high temperature to the destruction of Shell of circuit breaker.

Preferably, described guide vane end stop is cross section is leg-of-mutton guide vane end stop, and the top margin of described guide vane end stop contacts with described arc extinguishing grid pieces.

Adopt cross section to be leg-of-mutton guide vane end stop, the characteristic that the top margin of guide vane end stop can be utilized to contact with arc extinguishing grid pieces, reduces the obstruct to arc extinguishing grid pieces cavity.

Preferably, also there is catch, described catch has the second through hole;

Described guide vane end stop and described Shell of circuit breaker has the holddown groove for fixing described catch;

The surface contact of described catch and described arc extinguishing grid pieces.

Catch is set, the large characteristic of catch surface area can be utilized with guide vane end stop to coordinate fixing arc extinguishing grid pieces; Meanwhile, catch has the second through hole, high-temperature gas discharges arc extinguishing grid pieces by the second through hole.

Preferably, described catch has groove near the end face of described guide vane end stop.

Preferably, described catch is the catch that metal material is made.

Preferably, described catch has four described second through holes.

Preferably, described guide vane end stop is hollow guide vane end stop.

Preferably, described first through hole is positioned at the top end face of described circuit breaker.

Accompanying drawing explanation

Fig. 1 is the cut-away view of the utility model embodiment circuit breaker;

Fig. 2 is the schematic appearance of the utility model embodiment circuit breaker;

Fig. 3 is the structure chart of catch in the utility model embodiment.

Embodiment

For making those skilled in the art better understand the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Fig. 1 is the cut-away view of the utility model embodiment circuit breaker, circuit breaker as seen from Figure 1 in the utility model embodiment comprises Shell of circuit breaker 1 and arc extinguishing grid pieces 2, and wherein arc extinguishing grid pieces 2 is arranged in the cavity volume that can hold arc extinguishing grid pieces 2 in Shell of circuit breaker 1.One end of arc extinguishing grid pieces 2 contacts with arc iron plate with arc striking component, and when producing electric arc in circuit breaker, electric arc is caused arc iron plate place by electromagnetic action by arc striking component, and causes arc extinguishing grid pieces 2 by arc iron plate.Arc extinguishing grid pieces 2 by arc extinction, and has by self magnetic links the heat that the good feature of heat conduction efficiency absorbs ionized air.

In the utility model embodiment cavity volume sidewall 12 on there is guide vane end stop 13, one end of guide vane end stop 13 contacts with arc extinguishing grid pieces 2 and is fixed by arc extinguishing grid pieces 2, and the base of guide vane end stop 13 is connected with the sidewall 12 of cavity volume.Between the sidewall 12 and arc extinguishing grid pieces 2 of cavity volume, have certain hollow region, the cavity conducting of magnetic links in hollow region and arc extinguishing grid pieces 2, arc extinguishing grid pieces 2 striking produces high temperature air can drain into 1 hollow region from the cavity arc extinguishing grid pieces 2.

Shell of circuit breaker 1 in the utility model embodiment has the first through hole 11, first through hole 11 and hollow region conducting, after the high temperature air that arc extinguishing grid pieces 2 arc extinguishing produces can conduct to hollow region, discharged by the first through hole 11 again, scattering and disappearing as early as possible of heat can be realized, prevent high temperature from Shell of circuit breaker 1 and inner components being burnt out.

Guide vane end stop 13 in the utility model embodiment for cross section be leg-of-mutton guide vane end stop 13, the top margin of guide vane end stop 13 contacts with arc extinguishing grid pieces 2.From leg-of-mutton architectural feature, can find out that cross section is that the volume that leg-of-mutton guide vane end stop 13 takies hollow region is less, less with arc extinguishing grid pieces 2 contact area.Certainly in other embodiments of the utility model, also can adopt the guide vane end stop 13 of other shape and structures.

Have the drift angle characteristic that cavity and cross section are leg-of-mutton guide vane end stop 13 between each magnetic links due to arc extinguishing grid pieces 2, the cavity of arc extinguishing grid pieces 2 may the drift angle limit of just in time corresponding guide vane end stop 13 in actual applications, and arc extinguishing grid pieces 2 can not be fixed.For one of solution problem, in the utility model embodiment, be provided with catch 3, fix by catch 3 and the surface contact of arc extinguishing grid pieces 2 structure chart that arc extinguishing grid pieces 2, Fig. 3 is catch 3 in the utility model embodiment.In order to fixing catch 3, the Shell of circuit breaker 1 in the utility model embodiment and guide vane end stop 13 are provided with holddown groove.Arc extinguishing grid pieces 2 is arranged on after in cavity volume, to be inserted by catch 3 after holddown groove by catch 3 jam-packed arc extinguishing grid pieces 2, just arc extinguishing grid pieces 2 can be fixed.In the utility model, catch 3 has been arranged on the position comparatively close with Shell of circuit breaker 1, certainly, also catch 3 can be arranged on the part away from Shell of circuit breaker of hollow region limited piece 131 segmentation.Have the second through hole 31 in catch 3 in the utility model embodiment, therefore high temperature air is expelled to hollow region through the second through hole 31 and discharges circuit breaker through the first through hole 11.It should be noted that the circuit breaker of the utility model embodiment has two Shell of circuit breaker, 1, two Shell of circuit breaker 1 by rivet together, its internal cavities and corresponding housing parts fix all parts in circuit breaker.Two Shell of circuit breaker 1 all have guide vane end stop 13, and hollow region is divided into two parts after coordinating by guide vane end stop 13, and for realizing the conducting of two parts air, the section that catch 3 contacts with guide vane end stop 13 also has groove 32.Certainly, also guide vane end stop 13 can be set on a Shell of circuit breaker 1.In the utility model embodiment, catch 3 has not identical, the uneven setting of four the second through holes, 31, four the second through hole 31 sizes, ensure that the high-temperature gas in the cavity that arc extinguishing grid pieces 2 corresponding part two magnetic links are formed all can be discharged.Certainly, also catch 3 can be set to the form with larger second through hole 31, utilize catch 3 surrounding fixed support arc extinguishing grid pieces 2.

In the utility model embodiment, catch 3 have employed the magnetic links material punching identical with arc extinguishing grid pieces 2 and makes, and in other embodiments, also can adopt other materials.But from the viewpoint of structural strength and stand high-temperature gas impact etc., or preferably adopt metal material.

In this use new embodiment, guide vane end stop 13 is arranged on the centre position of sidewall 12, in other embodiments, also can change the position of guide vane end stop 13 accordingly.Cross section in the present embodiment is that leg-of-mutton guide vane end stop 13 additionally uses hollow structure, certainly also can be solid construction.

It should be noted that, sidewall 12 described in the utility model embodiment should be interpreted broadly, as Fig. 1, in order to realize the conducting of the first through hole 11 of hollow region and Shell of circuit breaker 1 bottom, sidewall 12 lower end bending in the utility model embodiment, and define gas channel with the lower part of Shell of circuit breaker 1.As can be seen from Figure, in order to realize the compact siro spinning technology of two Shell of circuit breaker 1, be also provided with corresponding rivet interlacement hole in gas channel position.Can not intercept gas channel completely in rivet interlacement hole as seen from the figure.

Fig. 2 is the schematic appearance of the utility model embodiment circuit breaker.As can be seen from Figure 2, two the first through holes 11 in the utility model embodiment are positioned at the top end face of circuit breaker.Such vibrational power flow considers that high-temperature gas has the trend of rising, can discharge at top easily; In other embodiments of the utility model, as less in top area space, also the first through hole 11 can be arranged on other positions.Consider that circuit breaker often uses together, the first through hole 11 position tries not to be arranged on two breaker contacts faces.

In above the utility model embodiment, circuit breaker is described in detail.Apply specific case herein to set forth principle of the present utility model and execution mode; the explanation of above embodiment just understands core concept of the present utility model for helping; when not departing from the utility model principle; also can carry out some improvement and modification to the utility model, these improve and modify and also fall in protection range of the present utility model.

Claims (8)

1. a circuit breaker, comprises Shell of circuit breaker (1) and arc extinguishing grid pieces (2); Described Shell of circuit breaker (1) has the cavity volume holding described arc extinguishing grid pieces (2); It is characterized in that:

The sidewall (12) of described cavity volume has guide vane end stop (13), described guide vane end stop (13) contacts with described arc extinguishing grid pieces (2), and the base of described guide vane end stop (13) is connected with the sidewall (12) of described cavity volume;

Between the sidewall (12) of described cavity volume and described arc extinguishing grid pieces (2), there is hollow region;

Described Shell of circuit breaker (1) also has the first through hole (11), and described hollow region is communicated with described first through hole (11).

2. circuit breaker according to claim 1, it is characterized in that: described guide vane end stop (13) for cross section be leg-of-mutton guide vane end stop (13), the top margin of described guide vane end stop (13) contacts with described arc extinguishing grid pieces (2).

3. circuit breaker according to claim 1, is characterized in that: also have catch (3), described catch (3) has the second through hole (31);

Described guide vane end stop (13) and described Shell of circuit breaker (1) has the holddown groove for fixing described catch (3);

The surface contact of described catch (3) and described arc extinguishing grid pieces (2).

4. circuit breaker according to claim 2, is characterized in that: described catch (3) has groove (32) near the end face of described guide vane end stop (13).

5. circuit breaker according to claim 2, is characterized in that: the catch (3) that described catch (3) is made for metal material.

6. circuit breaker according to claim 2, is characterized in that: described catch (3) has four described second through holes (31).

7. circuit breaker according to claim 1, is characterized in that: described guide vane end stop (13) is hollow guide vane end stop (13).

8. circuit breaker according to claim 1, is characterized in that: described first through hole (11) is positioned at the top end face of described circuit breaker.