CN220041764U - Arc-proof circuit breaker - Google Patents

Abstract

The utility model discloses an arc-proof circuit breaker, which comprises a circuit breaker frame and a mounting support seat arranged on the inner side of the circuit breaker frame, wherein an upright post is fixedly connected to the outer side of the mounting support seat, a square pipe is arranged at the top of the upright post, a grounding busbar is fixedly connected to the top of the square pipe, a grounding contact is fixedly connected to the top of the grounding busbar through a bolt, a bracket is arranged on the outer side of the grounding contact, and an arc-extinguishing grid sheet is arranged on the bracket.

Description

Arc-proof circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to an arc-proof circuit breaker.

Background

A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and closing, carrying and opening a current under abnormal circuit conditions within a prescribed time.

When faults such as short circuit occur in the existing circuit breaker, an electric arc can be generated between the moving contact and the grounding contact in the contact process, the electric arc easily burns out the moving contact and the grounding contact, the moving contact and the grounding contact are in poor contact, a circuit cannot be grounded, and certain potential safety hazards exist.

Disclosure of Invention

The present utility model is directed to an arc protection circuit breaker, which solves the above-mentioned problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an arc protection circuit breaker, includes the circuit breaker frame, and installs the inboard erection support of circuit breaker frame, the outside fixedly connected with stand of erection support, square pipe is installed at the top of stand, the top fixedly connected with ground connection busbar of square pipe, the top of ground connection busbar passes through bolt fixedly connected with ground contact, the support is installed in the outside of ground contact, be equipped with arc extinguishing bars piece on the support.

As a preferable scheme of the utility model, the top of the mounting support is movably provided with a movable contact.

As a preferable scheme of the utility model, a connecting piece is fixedly connected to the moving contact, a main shaft is rotatably connected to the inner side of the breaker frame, and a shaft sleeve is arranged on the outer side of the main shaft.

As a preferable scheme of the utility model, the outer side of the shaft sleeve is hinged with a crank arm, and one end of the crank arm, which is far away from the shaft sleeve, is hinged with the connecting piece.

As a preferable scheme of the utility model, a vacuum arc-extinguishing chamber is arranged on the inner side of the breaker frame, and a static contact is arranged at the bottom of the vacuum arc-extinguishing chamber.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, when faults such as short circuit occur, the arc generated between the moving contact and the grounding contact can be eliminated, the arc diffusion is prevented, and the moving contact and the grounding contact are prevented from being burnt out by the arc, so that the circuit cannot be grounded, and the safety is improved.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

fig. 2 is a right side view of the present utility model.

In the figure: 1. a circuit breaker frame; 2. a vacuum arc extinguishing chamber; 3. a stationary contact; 4. a shaft sleeve; 5. a main shaft; 6. a crank arm; 7. a connecting piece; 8. a moving contact; 9. a mounting support; 10. a bracket; 11. arc extinguishing grid plates; 12. a ground bus; 13. square tubes; 14. a column; 15. a ground contact.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 2, the present utility model provides a technical solution: the utility model provides an arc protection circuit breaker, including circuit breaker frame 1, and install the inboard mount pad 9 of circuit breaker frame 1, the outside fixedly connected with stand 14 of mount pad 9, square pipe 13 is installed at the top of stand 14, the top fixedly connected with ground strap 12 of square pipe 13, the effect of ground strap 12 is the voltage-sharing, the top of ground strap 12 passes through bolt fixedly connected with ground contact 15, ground contact 15 is used for guaranteeing the safe leading to ground of electric current when the trouble, protection personnel and equipment, support 10 is installed to the outside of ground contact 15, be equipped with arc extinguishing bars 11 on the support 10, when the trouble such as short circuit takes place, moving contact 8 and ground contact 15 contact can produce the electric arc when contacting, the electric arc is drawn into arc extinguishing bars 11 under the shrink force effect of magnetic line, electric arc and arc extinguishing bars 11 contact, the electric arc is cut apart multistage short arc by arc extinguishing bars 11, the energy that arc extinguishing bars 11 can effectively absorb, and distribute its heat to the surrounding environment, make the electric arc temperature drop rapidly, finally, make arc extinguishing bars 11 can effectively eliminate the diffusion of arc extinguishing bars 11, prevent that moving contact 8 from leading to the ground connection from causing the safety to the arc, the safety to the failure of the ground contact 15.

Wherein, movable contact 8 is movably installed at the top of mount bracket 9.

Wherein, fixedly connected with connecting piece 7 on the moving contact 8, connecting piece 7 are used for driving moving contact 8 to act, and the inboard of circuit breaker frame 1 rotates and is connected with main shaft 5, and the outside of main shaft 5 is equipped with axle sleeve 4, and axle sleeve 4 can rotate along with main shaft 5 together.

The outer side of the shaft sleeve 4 is hinged with a crank arm 6, the crank arm 6 is used for enabling the shaft sleeve 4 to drive the connecting piece 7 to move, and then the moving contact 8 is enabled to act, and one end, away from the shaft sleeve 4, of the crank arm 6 is hinged with the connecting piece 7.

The inner side of the breaker frame 1 is provided with a vacuum arc-extinguishing chamber 2, the vacuum arc-extinguishing chamber 2 can rapidly extinguish an arc and inhibit current after a power supply of a medium-high voltage circuit is cut off through excellent insulativity of vacuum in a tube, accidents and accidents are avoided, and the bottom of the vacuum arc-extinguishing chamber 2 is provided with a static contact 3.

Specifically, the spindle 5 rotates to drive the shaft sleeve 4 to rotate, the shaft sleeve 4 moves the connecting piece 7 through the crank arm 6, the connecting piece 7 enables the moving contact 8 to act, the moving contact 8 gradually approaches the grounding contact 15 and contacts with the grounding contact 15, when faults such as short circuit occur, the moving contact 8 contacts with the grounding contact 15 to generate an electric arc, the electric arc is drawn into the arc extinguishing grid sheet 11 under the action of the shrinkage force of magnetic force lines and contacts with the arc extinguishing grid sheet 11, the electric arc is divided into a plurality of sections of short arcs by the arc extinguishing grid sheet 11, the near-cathode effect is utilized, the fault current is reduced by increasing the voltage of the electric arc to achieve the arc extinguishing effect, meanwhile, the arc extinguishing grid sheet 11 can effectively absorb the energy of the electric arc and emit heat to the surrounding environment, the temperature of the electric arc is reduced rapidly, and finally the electric arc is extinguished, so that the moving contact 8 and the grounding contact 15 are prevented from being burnt out.

In the description of the present utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," "fourth" may explicitly or implicitly include at least one such feature.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. Arc protection circuit breaker, comprising a circuit breaker frame (1), and a mounting bracket (9) for mounting the inside of the circuit breaker frame (1), characterized in that: the device is characterized in that an upright post (14) is fixedly connected to the outer side of the mounting support (9), a square tube (13) is mounted at the top of the upright post (14), a grounding busbar (12) is fixedly connected to the top of the square tube (13), a grounding contact (15) is fixedly connected to the top of the grounding busbar (12) through a bolt, a support (10) is mounted on the outer side of the grounding contact (15), and an arc extinguishing grid sheet (11) is arranged on the support (10).

2. An arc protection circuit breaker according to claim 1, characterized in that: the top of the mounting support (9) is movably provided with a moving contact (8).

3. An arc protection circuit breaker according to claim 2, characterized in that: the movable contact (8) is fixedly connected with a connecting piece (7), the inner side of the breaker frame (1) is rotatably connected with a main shaft (5), and the outer side of the main shaft (5) is provided with a shaft sleeve (4).

4. An arc protection circuit breaker according to claim 3, characterized in that: the outer side of the shaft sleeve (4) is hinged with a crank arm (6), and one end, far away from the shaft sleeve (4), of the crank arm (6) is hinged with the connecting piece (7).

5. An arc protection circuit breaker according to claim 1, characterized in that: the circuit breaker is characterized in that a vacuum arc-extinguishing chamber (2) is arranged on the inner side of the circuit breaker frame (1), and a static contact (3) is arranged at the bottom of the vacuum arc-extinguishing chamber (2).