CN212676210U - B3H high breaking hydraulic electromagnetic circuit breaker and arc extinguish chamber thereof - Google Patents

Abstract

The utility model provides a B3H high disconnected hydraulic pressure electromagnetic circuit breaker that divides and explosion chamber thereof, the explosion chamber includes support, a plurality of arc extinguishing bars piece, arc extinguishing bars piece interval and range upon range of setting on the support, interval between two adjacent arc extinguishing bars pieces is from being close to the contact end to keeping away from the contact direction crescent, and a plurality of arc extinguishing bars piece top-down become fan-shaped distribution like this, and the arc extinguishing space crescent between the adjacent arc extinguishing bars piece to divide the disconnected in-process of electric arc to lengthen electric arc. The utility model discloses two adjacent arc extinguishing bars piece interval crescent can guarantee effectively to cut apart and lengthen electric arc when disconnected, is favorable to the entering and extinguishing of electric arc.

Description

B3H high breaking hydraulic electromagnetic circuit breaker and arc extinguish chamber thereof

Technical Field

The utility model relates to a circuit breaker, specifically speaking relates to an explosion chamber of circuit breaker and have the disconnected hydraulic pressure electromagnetic circuit breaker of B3H height of this explosion chamber, and electric arc is effectively cut apart and elongated when this circuit breaker can guarantee to divide absolutely, is favorable to the entering and extinguishing of electric arc.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breaker generally includes contact, tripping device and explosion chamber etc. and current explosion chamber structure generally comprises the arc extinguishing bars piece that the multi-disc is parallel and the interval sets up and the insulation board that two are parallel and the interval sets up, and two insulation boards are fixed with the parallel state of the range upon range of arc extinguishing bars piece of multi-disc. Generally, an avoiding groove is formed on one side of each arc-extinguishing grid plate close to the contact, and thus when a plurality of arc-extinguishing grid plates are stacked, an avoiding space for the moving contact to pass through is formed in the middle of the stacked arc-extinguishing grid plates. When the movable contact and the static contact are separated, the electric arc generated between the movable contact and the static contact enters the arc extinguishing grid plate under the action of electric power, the arc extinguishing grid plate is divided into a plurality of sections of short arcs connected in series by the stacked arc extinguishing grid plate, and when the power supply voltage is lower than the arc voltage, the electric arc is naturally extinguished. Because the space structure of the circuit breaker is limited, the number of arc extinguishing grids is limited, and therefore, how to improve the arc extinguishing capability of the arc extinguishing chamber in the limited space is one of the technical difficulties in the prior art.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an explosion chamber of circuit breaker, two adjacent arc extinguishing bars piece intervals of this explosion chamber increase gradually, can guarantee effectively cut apart when disconnected and lengthen electric arc, are favorable to the entering and extinguishing of electric arc.

A second object of the present invention is to provide a B3H high breaking hydraulic electromagnetic circuit breaker, wherein the circuit breaker is provided with the arc extinguish chamber.

Based on the above-mentioned purpose, an aspect of the utility model provides an explosion chamber of circuit breaker, including support, a plurality of arc extinguishing bars piece, arc extinguishing bars piece interval and range upon range of setting up on the support, interval between two adjacent arc extinguishing bars pieces is held to keeping away from the contact direction crescent from being close to the contact, and a plurality of arc extinguishing bars piece top-down become fan-shaped distribution like this, and the arc extinguishing space crescent between the adjacent arc extinguishing bars piece to at the disconnected in-process of electric arc length electric arc that elongates.

Preferably, an avoiding groove is formed in the middle of one side, close to the contact, of the arc-extinguishing grid piece, and the width of the avoiding groove gradually narrows from the end close to the contact to the direction away from the contact.

Preferably, the edge of the opening end of the avoiding groove is adducted in an arc shape, and the bottom of the avoiding groove is V-shaped.

Preferably, the avoiding groove is V-shaped.

Preferably, the arc chute pieces are bent downwards far away from the contact ends, so that the occupied space of the arc chute pieces is reduced.

Preferably, the number of the arc extinguishing grid pieces is 4-5.

Preferably, the bracket comprises insulating plates symmetrically arranged on two sides of the arc-extinguishing grid plate, and one side of the insulating plate, which is close to the arc-extinguishing grid plate, is provided with a gas generating plate.

In another aspect of the present invention, a B3H high breaking hydraulic electromagnetic circuit breaker is provided, which includes a housing, wherein a movable contact, a stationary contact, a tripping mechanism and the arc extinguish chamber are disposed in the housing, and the movable contact and the stationary contact are disposed adjacent to the arc extinguish chamber; the tripping mechanism is connected with the movable contact.

Preferably, the movable contact is connected with the tripping mechanism through a contact rod, an arc extinguishing block is arranged on the contact rod, and the arc extinguishing block is made of gas generation materials.

Preferably, an arc blocking piece is further arranged above the contact rod and is arranged on one side, far away from the fixed contact, of the movable contact.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an arc extinguishing chamber's two adjacent arc extinguishing bars piece interval crescent can guarantee effectively cut apart and lengthen electric arc when disconnected, is favorable to the entering and extinguishing of electric arc.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic view of an overall structure of an arc extinguish chamber in the embodiment of the invention;

fig. 2 is a schematic view of the overall structure of the arc extinguish chamber in the embodiment of the present invention;

fig. 3 is a schematic view of an internal structure of an arc extinguish chamber in the embodiment of the invention;

fig. 4 is a schematic diagram of an internal structure of a circuit breaker according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an internal structure of a circuit breaker according to an embodiment of the present invention;

fig. 6 is a schematic diagram of the current flowing direction in the circuit breaker according to the embodiment of the present invention.

101, a movable contact; 102. a stationary contact; 103. a tripping mechanism; 104. an arc extinguishing chamber; 105. an upper arc angle; 106. a lower arc angle;

1011. a movable contact rod; 1012. an arc extinguishing block; 1013. an arc blocking sheet;

1041. arc extinguishing grid pieces; 1042. an insulating plate; 1043. a gas generating sheet; 1044. avoiding the groove.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The embodiment provides an arc extinguishing chamber of a circuit breaker, as shown in fig. 1-3, including support, a plurality of arc extinguishing bars 1041, arc extinguishing bars 1041 interval and range upon range of setting on the support, and the interval between two adjacent arc extinguishing bars 1041 is from being close to the contact end to keeping away from the contact direction crescent, and a plurality of arc extinguishing bars 1041 top-down become fan-shaped distribution like this, and arc extinguishing space crescent between adjacent arc extinguishing bars 1041 to stretch electric arc in electric arc breaking process.

Preferably, an avoiding groove 1044 is formed in the middle of one side of the arc-extinguishing grid 1041, which is close to the contact, and the width of the avoiding groove 1044 gradually narrows from the end close to the contact to the direction away from the contact.

As a preferred embodiment, the edge of the opening end of the avoiding groove 1044 is curved inward, and the bottom of the avoiding groove 1044 is V-shaped.

In a preferred embodiment, the avoidance groove 1044 is V-shaped.

As a preferred embodiment, the arc chute 1041 is bent downward away from the contact end, so as to reduce the space occupied by the arc chute 1041.

In a preferred embodiment, the number of the arc chute 1041 is 4-5. Preferably, in this embodiment, there are 4 arc-extinguishing grid pieces 1041, and the distance between adjacent arc-extinguishing grid pieces 1041 is gradually increased and distributed in a sector shape, so as to ensure effective division and elongation of the arc during breaking, which is beneficial to entering and extinguishing of the arc.

As a preferred embodiment, the bracket includes insulating plates 1042 symmetrically disposed on two sides of the arc chute 1041, and a gas generating plate 1043 is disposed on one side of the insulating plates 1042 near the arc chute 1041. Preferably, the insulating plate 1042 is made of thermosetting plastic, so that the electrical insulating property is improved, the conduction failure between the grid plates during the breaking is avoided, and the breaking reliability is ensured.

The present embodiment further provides a B3H high breaking hydraulic electromagnetic circuit breaker, as shown in fig. 4-6, the circuit breaker includes a housing, a movable contact 101, a fixed contact 102, a trip mechanism 103 and the arc extinguish chamber 104 as described above are disposed in the housing, and the movable contact 101 and the fixed contact 102 are disposed adjacent to the arc extinguish chamber 104; a trip mechanism 103 is connected to the movable contact 101.

As a preferred embodiment, the movable contact 101 is connected to the trip mechanism 103 through a contact rod, the contact rod is provided with an arc-extinguishing block 1012, and the arc-extinguishing block 1012 is made of gas-generating material.

In a preferred embodiment, an arc-blocking piece 1013 is further disposed above the contact rod, and the arc-blocking piece 1013 is disposed on a side of the moving contact 101 away from the fixed contact 102.

When the arc is broken, at the moment that the moving contact is separated from the static contact, the arc foot of the electric arc is on the moving contact 102, and due to the huge heat generated by the electric arc, the material of the arc extinguishing block 1012 releases gas to push the electric arc to enter the arc extinguishing chamber 104; when the arc is pushed to be elongated into the arc extinguishing chamber 104, the arc pin on the fixed contact 102 is guided to the lower arc angle 106, so that the burning loss of the fixed contact 102 is reduced; subsequently, when the feeler lever returns to the end position, the upper arc horn 105 and the feeler lever are always at the same electric potential, and the arc pin on the movable contact 101 jumps to the upper arc horn 105, thus facilitating the electric arc to enter the arc extinguishing chamber 104 and reducing the burning loss of the movable contact 101.

To sum up, the utility model discloses an arc extinguishing chamber's two adjacent arc extinguishing bars piece interval crescent can guarantee effectively cut apart when disconnected and lengthen electric arc, is favorable to the entering and extinguishing of electric arc.

Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and that any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims (10)

1. The utility model provides an explosion chamber of circuit breaker, includes support, a plurality of arc extinguishing bars piece (1041), arc extinguishing bars piece (1041) interval and range upon range of setting on the support, its characterized in that, interval between two adjacent arc extinguishing bars piece (1041) is held to keeping away from the contact direction crescent from being close to the contact, and a plurality of arc extinguishing bars piece (1041) top-down become fan-shaped distribution like this, and the arc extinguishing space crescent between adjacent arc extinguishing bars piece (1041) to divide the broken in-process arc at electric arc and lengthen electric arc.

2. The arc extinguish chamber of the circuit breaker according to claim 1, wherein an avoiding groove (1044) is formed in the middle of one side of the arc extinguish grid piece (1041) close to the contact, and the width of the avoiding groove (1044) gradually narrows from the contact end to the contact end.

3. Arc extinguish chamber of a circuit breaker according to claim 2, wherein the edge of the open end of the avoiding groove (1044) is curved inward, and the bottom of the avoiding groove (1044) is V-shaped.

4. Arc chute of a circuit breaker according to claim 2, characterized in that said avoiding groove (1044) is V-shaped.

5. The arc chute of a circuit breaker according to claim 1, characterized in that the arc chute (1041) is bent downwards away from the contact end, thereby reducing the space occupied by the arc chute (1041).

6. Arc chute of a circuit breaker according to claim 1, characterized in that said arc chute (1041) is 4-5.

7. The arc extinguish chamber of the circuit breaker according to claim 1, wherein the bracket comprises insulating plates (1042) symmetrically arranged at two sides of the arc extinguish grid plate (1041), and a gas generating plate (1043) is arranged at one side of the insulating plates (1042) close to the arc extinguish grid plate (1041).

8. A B3H high breaking hydraulic electromagnetic circuit breaker, characterized by comprising a housing, wherein a movable contact (101), a fixed contact (102), a tripping mechanism (103) and an arc extinguish chamber (104) according to any one of claims 1 to 7 are arranged in the housing, and the movable contact (101) and the fixed contact (102) are arranged adjacent to the arc extinguish chamber (104); and the tripping mechanism (103) is connected with the movable contact (101).

9. The B3H high breaking hydraulic pressure electromagnetic circuit breaker according to claim 8, wherein the moving contact (101) is connected with the tripping mechanism (103) through a contact rod, the contact rod is provided with an arc extinguishing block (1012), and the arc extinguishing block (1012) is made of gas generating material.

10. A B3H high breaking hydraulic pressure electromagnetic circuit breaker according to claim 9, wherein an arc blocking piece (1013) is further provided above the contact rod, and the arc blocking piece (1013) is provided on one side of the movable contact (101) far from the fixed contact (102).

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