CN219106056U

CN219106056U - Arc extinguishing structure of circuit breaker

Info

Publication number: CN219106056U
Application number: CN202223198464.7U
Authority: CN
Inventors: 潘礼云; 高腾飞; 陈跃跃; 邓明凯; 蒋亚
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-05-30
Anticipated expiration: 2032-12-01

Abstract

An arc extinguishing structure of a circuit breaker. The circuit breaker arc piece and the contact separation that mainly solve present are set up, and the problem that striking arc extinguishing effect is not good. The method is characterized in that: the static contact plate is provided with a static contact (50) and a first arc striking plate (52), one end of the first arc striking plate is provided with a containing groove (521), the other end of the first arc striking plate is provided with an arc striking part (522) facing the arc extinguishing chamber, and the static contact is at least partially arranged in the containing groove. The utility model provides an arc extinguishing structure of a circuit breaker, wherein one end of an arc striking plate surrounds a fixed contact, and the other end of the arc striking plate is provided with an arc striking part, so that an arc can be better guided into an arc extinguishing chamber to be extinguished.

Description

Arc extinguishing structure of circuit breaker

Technical Field

The utility model relates to the field of direct current circuit breakers, in particular to an arc extinguishing structure of a circuit breaker.

Background

The principle of the circuit breaker is that an arc-extinguishing chamber of the circuit breaker is rapidly disconnected by utilizing a movable contact and a static contact, and voltage between the movable contact and the static contact causes air medium discharge so as to generate high-temperature electric arc, and the electric arc causes the temperature of air in the arc-extinguishing chamber to rise in the combustion process so as to accelerate air ionization. At this time, under the action of a plurality of arc isolation grid sheets in the arc extinguishing chamber, the high-temperature electric arc is separated into a plurality of short arcs, and the deionization effect of the electric arc is enhanced by virtue of the metal arc isolation sheets, so that the electric arc becomes small and the voltage rises, and finally the electric arc is extinguished.

As shown in chinese patent publication No. CN213304049U, the striking plate and the contact of the current circuit breaker are separately disposed, so that the arc cannot be well guided into the arc extinguishing chamber during breaking.

Disclosure of Invention

In order to overcome the defects of the background technology, the utility model provides an arc extinguishing structure of a circuit breaker, which mainly solves the problem that the arc striking and extinguishing effects are poor due to the fact that arc sheets and contacts of the existing circuit breaker are arranged separately.

The technical scheme adopted by the utility model is as follows:

the utility model provides an arc extinguishing structure of circuit breaker, includes explosion chamber and the static contact board of relative setting, be equipped with static contact and first striking board on the static contact board, first striking board one end is equipped with the holding tank, and the other end is equipped with the orientation the striking portion of explosion chamber, the static contact is at least partly located in the holding tank.

The static touch plate is formed by stacking at least two sub-plates.

The arc striking part is a warping part which is integrally made with the first arc striking plate and faces the arc extinguishing chamber.

The explosion chamber includes fixed plate and produces the gas board, be equipped with a plurality of bars piece on the fixed plate, produce a plurality of logical grooves that transversely run through of terminal surface is equipped with before the gas board, logical groove with the bar piece sets up relatively.

The through grooves are arranged in one-to-one correspondence with the grid sheets.

The gas generating plate is detachably connected with the fixing plate.

The fixing plate is provided with a slot, and the gas generating plate is provided with a bulge matched with the slot.

The gas generating plate is provided with a plurality of supporting feet, a clearance groove is arranged between every two adjacent grid sheets, and a single supporting foot stretches into the clearance groove.

The fixed plate is provided with a top plate, the top plate is provided with a second arc striking plate, and the second arc striking plate is arranged opposite to the grid sheet.

At least two second striking boards are arranged, and an empty slot for elongating electric arc is arranged between the two second striking boards.

The beneficial effects of the utility model are as follows: the utility model provides an arc extinguishing structure of a circuit breaker, wherein one end of an arc striking plate surrounds a fixed contact, and the other end of the arc striking plate is provided with an arc striking part, so that an arc can be better guided into an arc extinguishing chamber to be extinguished.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present utility model.

Fig. 2 is a schematic perspective view of a stationary touch panel according to an embodiment of the utility model.

Fig. 3 is a schematic perspective view of a gas cap according to an embodiment of the present utility model.

FIG. 4 is a schematic cross-sectional view of one embodiment of the present utility model.

Fig. 5 is a schematic perspective view of a top plate according to an embodiment of the present utility model.

Fig. 6 is a schematic view of a partial explosion of an embodiment of the present utility model.

Detailed Description

The utility model is further described below with reference to the accompanying drawings: as shown in the figure, an arc extinguishing structure of a circuit breaker comprises an arc extinguishing chamber 10 and a static contact plate 5 which are oppositely arranged, wherein a static contact 50 and a first arc striking plate 52 are arranged on the static contact plate, one end of the first arc striking plate is provided with a containing groove 521, the other end of the first arc striking plate is provided with an arc striking part 522 facing the arc extinguishing chamber, and the static contact is at least partially arranged in the containing groove. The fixed contact is surrounded to its striking board one end, and the other end is equipped with the striking portion, and the arc chamber that will arc that can be better goes out, and the circumference edge of here fixed contact can be convenient for better transmission electric arc with the inner wall contact of holding tank, and as the preferred scheme, the three face of fixed contact all contacts with the holding tank, and the striking portion can be towards the perk of explosion chamber or sharp etc..

In this embodiment, as shown, the stationary contact plate is formed by stacking at least two sub-plates 51. A plurality of superimposed static contacts: because the current-carrying capacity of the product is large, the thickness of the single-block fixed contact is too thick, and the stamping cost is too high, the single-block thick fixed contact is changed into a plurality of Bao Jing contacts to be overlapped, the cost of parts is reduced, and meanwhile, the current-carrying surface is also increased.

In this embodiment, as shown in the figure, the arc striking portion is a tilt made integrally with the first arc striking plate and facing the arc extinguishing chamber. The arc can be quickly led out. When the static contact is arranged below the arc extinguishing chamber, the static contact can be lifted upwards.

In this embodiment, as shown in the figure, the arc extinguishing chamber includes a fixing plate 1 and a gas generating plate 2, a plurality of grid plates 3 are disposed on the fixing plate, and a plurality of through slots 21 penetrating transversely are disposed on the front end surface of the gas generating plate, and the through slots are disposed opposite to the grid plates. The grid piece and the fixed plate are installed into the prior art, and the description is not repeated, the gas generating plate can be installed on the fixed plate, the front end face of the gas generating plate is provided with a through groove, the through groove and the grid piece are oppositely arranged, the grid piece can be arranged in the through groove by the opposite arrangement, the height of the through groove is larger than the thickness of the arc extinguishing grid piece, so that generated gas is easier to enter the grid piece, and the gas outlet effect is improved.

In this embodiment, as shown in the drawing, the through grooves are arranged in one-to-one correspondence with the gate sheets. One grid sheet is arranged in one through groove, so that the use effect is better.

In this embodiment, as shown in the figure, the gas generating plate is detachably connected to the fixing plate.

In this embodiment, as shown in the figure, the fixing plate is provided with a slot 11, and the gas generating plate is provided with a protrusion 22 matched with the slot. The bulge of the gas generating plate is arranged in the slot, and the installation is convenient.

In this embodiment, as shown in the figure, the gas generating plate is provided with a plurality of supporting legs 23, and a gap groove 31 is provided between adjacent grid sheets, and a single supporting leg extends into the gap groove. Furthermore, the multi-petal gas generating cover is adopted, and each petal is arranged between the grid plates of the arc extinguishing chamber, so that the gas generating cover has good gas generating effect

In this embodiment, as shown in the drawing, the fixing plate is provided with a top plate 4, and the top plate is provided with a second arc striking plate 41, where the second arc striking plate is opposite to the grid sheet.

In this embodiment, as shown in the figure, adjacent gate sheets are staggered. The V-shaped grid notches are mutually staggered, so that the arc can be well cut.

In this embodiment, as shown in the figure, at least two second striking plates 41 have a hollow 42 for elongating the arc between them. The arc striking effect is increased.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify 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 therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," 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. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The embodiments described with reference to the drawings are exemplary and intended to be illustrative of the utility model and should not be construed as limiting the utility model. 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

1. The utility model provides an arc extinguishing structure of circuit breaker, includes explosion chamber (10) and static contact board (5) of relative setting, its characterized in that: the static contact plate is provided with a static contact (50) and a first arc striking plate (52), one end of the first arc striking plate is provided with a containing groove (521), the other end of the first arc striking plate is provided with an arc striking part (522) facing the arc extinguishing chamber, and the static contact is at least partially arranged in the containing groove.

2. The arc extinguishing structure of a circuit breaker according to claim 1, wherein: the stationary contact plate is formed by stacking at least two sub-plates (51).

3. The arc extinguishing structure of a circuit breaker according to claim 1, wherein: the arc striking part is a warping part which is integrally made with the first arc striking plate and faces the arc extinguishing chamber.

4. The arc extinguishing structure of a circuit breaker according to claim 1, wherein: the explosion chamber includes fixed plate (1) and produces gas board (2), be equipped with a plurality of bars piece (3) on the fixed plate, produce gas board preceding terminal surface and be equipped with a plurality of logical grooves (21) that transversely run through, logical groove with the bar piece sets up relatively.

5. The arc extinguishing structure of a circuit breaker according to claim 4, wherein: the through grooves are arranged in one-to-one correspondence with the grid sheets.

6. The arc extinguishing structure of a circuit breaker according to claim 5, wherein: the gas generating plate is detachably connected with the fixing plate.

7. The arc extinguishing structure of a circuit breaker according to claim 6, wherein: the fixing plate is provided with a slot (11), and the gas generating plate is provided with a bulge (22) matched with the slot.

8. The arc extinguishing structure of a circuit breaker according to claim 7, wherein: a plurality of supporting legs (23) are arranged on the gas generating plate, clearance grooves (31) are formed between adjacent grid sheets, and single supporting leg stretches into the clearance grooves.

9. The arc extinguishing structure of a circuit breaker according to claim 8, wherein: the fixed plate is provided with a top plate (4), the top plate is provided with a second arc striking plate (41), and the second arc striking plate is arranged opposite to the grid sheet.

10. The arc extinguishing structure of a circuit breaker according to claim 9, wherein: at least two second striking plates (41) are arranged, and a hollow groove (42) for elongating the electric arc is arranged between the two second striking plates.