CN219350130U - Arc extinguishing chamber with dissociation function - Google Patents

Abstract

The utility model discloses an arc-extinguishing chamber with a dissociation function, which comprises two symmetrically arranged partition plates and a plurality of arc-extinguishing grid sheets which are arranged between the two partition plates in a stacked mode, wherein the front end of each arc-extinguishing grid sheet is arranged as an inlet end, the rear end of each arc-extinguishing grid sheet is arranged as an exhaust end, the exhaust end of any arc-extinguishing grid sheet is bent downwards and/or upwards to form an dissociation part, and a plurality of first air holes are formed in the surface of the dissociation part. The arc extinguishing chamber is provided with the dissociation structure, so that arc extinguishing can be effectively carried out on the generated electricity dissociation, the separation flashover distance is reduced, the probability of reburning is reduced, and meanwhile, in order to optimize exhaust, a porous exhaust structure is designed, and the breaking capacity of the circuit breaker can be effectively improved.

Description

Arc extinguishing chamber with dissociation function

Technical Field

The utility model particularly relates to an arc extinguishing chamber with a dissociation elimination function.

Background

The circuit breaker is used as a protection switch, and is mainly used for protecting a circuit from faults such as short circuits, overload and the like. The arc extinguishing structure, namely the arc extinguishing chamber, is mainly responsible for bearing the action of the circuit breaker for extinguishing the arc when the fault current is cut off, and the good or bad of the arc extinguishing effect has great influence on the cut-off performance of the circuit breaker. If the electric dissociation generated in the arc extinguishing process is not timely dissociated, the phenomenon of reburning is easy to occur, and the problem of interphase short circuit can occur in extreme cases.

The traditional arc-extinguishing chamber of the molded case circuit breaker in the current market has difficulty in effectively improving the breaking performance of the circuit breaker; under the condition of no good dissociation, the dissociation can be carried out only by means of the external arc-isolating insert sheet or the flame-extinguishing chamber. For example, chinese patent CN2586244Y discloses a zero arcing arc-extinguishing device for a molded case circuit breaker, which adopts a mode of adding a piece of de-ionization arc-extinguishing gate sheet to perform de-ionization.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide the arc extinguishing chamber with the function of eliminating dissociation.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an explosion chamber of free function disappears in area, its baffle that includes two symmetries settings and a plurality of stacks of setting are put in arc extinguishing bars piece between two baffles, and the front end of the arc extinguishing bars piece of stacks of setting sets up to the entrance point, and its rear end sets up to the exhaust end, and the exhaust end of arbitrary arc extinguishing bars piece is downwards and/or upwards buckled and is formed the free portion that disappears, free portion surface that disappears is equipped with a plurality of first gas pockets.

The exhaust end of the arc extinguishing bars at the uppermost side is downwards bent to form an arc extinguishing portion, the arc extinguishing portion comprises a first bending portion and a second bending portion which are sequentially connected, the second bending portion is located at the rear sides of the arc extinguishing bars, and a plurality of first air holes are formed in the second bending portion.

The first bending part is provided with a plurality of second air holes.

The arc extinguishing grid sheet at the uppermost side is provided with a plurality of exhaust holes arranged in an array.

The front end of each arc-extinguishing grid sheet is provided with a narrow slit which is not arranged in the middle, and the narrow slits of two adjacent arc-extinguishing grid sheets are arranged in a staggered mode.

The inlet end of the arc extinguishing grid piece at the uppermost side is provided with an arc striking angle.

The arc striking angle is S-shaped and is upward.

And narrow slits are arranged on two sides of the arc striking angle.

The utility model has the beneficial effects that: the arc extinguishing chamber is provided with the dissociation structure, so that arc extinguishing can be effectively carried out on the generated electricity dissociation, the separation flashover distance is reduced, the probability of reburning is reduced, and meanwhile, in order to optimize exhaust, a porous exhaust structure is designed, and the breaking capacity of the circuit breaker can be effectively improved.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic cross-sectional view of the present utility model.

Fig. 3 is a front end elevational view of the present utility model.

Fig. 4 is a schematic structural view of an arc chute sheet with an extinction portion according to the present utility model.

Fig. 5 is a front view of an arc chute sheet of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. 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.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

As shown in the figure, the utility model discloses an arc extinguishing chamber with an arc extinguishing function, which comprises two symmetrically arranged partition boards 1 and a plurality of arc extinguishing grid sheets 2 which are stacked between the two partition boards, wherein each arc extinguishing grid sheet is arranged at an obtuse angle, the capacity of the arc extinguishing grid sheet is improved, two ends of each arc extinguishing grid sheet are respectively hinged with a partition board frame, the front ends 21 of the arc extinguishing grid sheets which are stacked are arranged as inlet ends 4, the rear ends 22 of the arc extinguishing grid sheets are arranged as exhaust ends 5, the inlet ends are concavely arranged in the direction of the exhaust ends, the exhaust ends of any one arc extinguishing grid sheet are downwards and/or upwards bent to form an arc extinguishing part 3, a plurality of first air holes 6 are formed on the surface of the arc extinguishing part, the arc extinguishing part approximates to an iron net structure, and the characteristic of iron adsorption ionization is utilized to extinguish the arc extinguishing, so that the arc extinguishing distance is effectively reduced, and the arc extinguishing chamber can be applied to products with zero flashover.

The exhaust end of the arc extinguishing bars piece on the uppermost side is downwards bent to form an elimination part 3, the elimination part comprises a first bending part 31 and a second bending part 32 which are sequentially connected, the second bending part is positioned at the rear side of a plurality of arc extinguishing bars pieces, the arc extinguishing bars piece positioned on the upper side is downwards bent by the first bending part and covers part of the exhaust end, the second bending part is perpendicular to the exhaust direction of the exhaust end, a plurality of first air holes 6 are formed in the second bending part, and the first air holes can be round holes arranged in an array or strip-shaped holes arranged in an array.

The first bending part is provided with a plurality of second air holes 8, and the second air holes are round holes arranged in an array.

The front inserting piece is matched with the sealing structure to form an air flow channel, so that the arc extinguishing capability is improved.

The arc extinguishing bars at the uppermost side are provided with a plurality of exhaust holes 9 which are arranged in an array, a plurality of rows of exhaust holes are distributed, when the arc is broken, the generated gas burns the gas generating material at high temperature, the generated gas drives the arc to quickly enter the arc extinguishing chamber to extinguish the arc, and a piece of arc extinguishing bars is added at the uppermost side to exhaust, so that the arc extinguishing speed of the arc can be effectively improved.

The front ends 21 of the arc extinguishing bars 2 are arranged at an obtuse angle.

The front end 21 of arc extinguishing bars piece 2 is equipped with the slot 22 that the non-set up in the middle, and the slot of two adjacent arc extinguishing bars pieces is crisscross to be set up, adopt the structure of slot symmetrical layout, as shown by the broken line frame in fig. 3, wherein broken line frame A represents the slot distribution of one side, and another broken line frame represents the slot distribution of opposite side, both set up according to the arc striking angle central line symmetry, borrow the characteristic that the explosion chamber draws the arc, the characteristic that Z type draws the arc in 2 adjacent arc extinguishing bars pieces can improve the arc voltage of circuit breaker.

The explosion chamber adopts the layout structure with circuit breaker pivot rotation concentricity, and the parallel layout of arc extinguishing bars piece adopts the compatible overall arrangement simultaneously with pivot rotation center and movable knife rotation center, is satisfying the mechanism action and driving pivot breaking in-process, and movable knife and arc extinguishing bars piece relative distance is unanimous (can have slight deviation), has also taken into account because of the effect that electric repulsion moves the arc transfer that probably produces when the sword opens in advance.

The inlet end of the arc extinguishing grid sheet at the uppermost side is provided with an arc striking angle 7.

The arc striking angle 7 is S-shaped and is upward arranged. The design of the arc striking angle of the S type considers that the arc root can be opened along with the movable cutter in the breaking process, and is transferred to the front end position of the movable cutter by the silver point, and when the maximum opening distance is reached, the arc striking angle of the S type can be used for transferring the arc root to the arc extinguishing chamber more smoothly.

The two sides of the arc striking angle are provided with narrow slits which are matched with the narrow slits of the rest arc extinguishing grid sheets, and the arc voltage of the circuit breaker can be improved by utilizing the characteristic of Z-shaped arc discharge in 2 adjacent arc extinguishing grid sheets.

The examples should not be construed as limiting the utility model, but any modifications based on the spirit of the utility model should be within the scope of the utility model.

Claims (8)

1. An explosion chamber with a dissociation function, which is characterized in that: the arc extinguishing grid plate comprises two symmetrically arranged partition plates and a plurality of arc extinguishing grid plates which are arranged between the two partition plates in a stacked mode, wherein the front end of each arc extinguishing grid plate is arranged to be an inlet end, the rear end of each arc extinguishing grid plate is arranged to be an exhaust end, the exhaust end of any arc extinguishing grid plate is bent downwards and/or upwards to form an arc extinguishing part, and a plurality of first air holes are formed in the surface of the arc extinguishing part.

2. An arc extinguishing chamber with deionization function according to claim 1, wherein: the exhaust end of the arc extinguishing bars at the uppermost side is downwards bent to form an arc extinguishing portion, the arc extinguishing portion comprises a first bending portion and a second bending portion which are sequentially connected, the second bending portion is located at the rear sides of the arc extinguishing bars, and a plurality of first air holes are formed in the second bending portion.

3. An arc extinguishing chamber with deionization function according to claim 2, wherein: the first bending part is provided with a plurality of second air holes.

4. An arc extinguishing chamber with deionization function according to claim 1 or 2 or 3, characterized in that: the arc extinguishing grid sheet at the uppermost side is provided with a plurality of exhaust holes arranged in an array.

5. An arc extinguishing chamber with deionization function according to claim 1, wherein: the front end of each arc-extinguishing grid sheet is provided with a narrow slit which is not arranged in the middle, and the narrow slits of two adjacent arc-extinguishing grid sheets are arranged in a staggered mode.

6. An arc extinguishing chamber with deionization function according to claim 1, wherein: the inlet end of the arc extinguishing grid piece at the uppermost side is provided with an arc striking angle.

7. The arc chute with deionization function as claimed in claim 6, wherein: the arc striking angle is S-shaped and is upward.

8. An arc extinguishing chamber with deionization function according to claim 6 or 7, characterized in that: and narrow slits are arranged on two sides of the arc striking angle.

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