CN222483182U

CN222483182U - Circuit breaker with baffle structure

Info

Publication number: CN222483182U
Application number: CN202420546220.3U
Authority: CN
Inventors: 程李御; 袁波; 令狐绍江; 周春妮; 许辰晨; 吴超云; 徐敏; 陈晓军; 陈静; 李晓蒙
Original assignee: Zhejiang Tengen Intelligent Electrical Appliance Co ltd; Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Intelligent Electrical Appliance Co ltd; Zhejiang Tengen Electric Co Ltd
Priority date: 2023-08-31
Filing date: 2024-03-20
Publication date: 2025-02-14
Anticipated expiration: 2034-03-20
Also published as: CN221927833U; CN221960864U; CN116913743A; CN221946996U; CN118039389A

Abstract

The utility model provides a circuit breaker with a partition plate structure, which comprises an arc extinguishing chamber body, wherein the arc extinguishing chamber body comprises a first arc extinguishing chamber arranged in the first arc extinguishing chamber body at intervals, an arc extinguishing assembly comprises a first arc extinguishing sheet cluster, the first arc extinguishing sheet cluster comprises a first vertical grid sheet group arranged at intervals at the inner end of the first arc extinguishing chamber body along the length direction of the arc extinguishing chamber body, and a first inclined grid sheet group and a second inclined grid sheet group which are arranged at intervals at two sides of the first arc extinguishing chamber body along the width direction of the arc extinguishing chamber body, the first vertical grid sheet group, the first inclined grid sheet group and the second inclined grid sheet group are arranged in a U-shaped manner in the first arc extinguishing chamber body, a gas producing cover is arranged at the opening side of the arc extinguishing chamber body and comprises a first extension assembly, a first gas producing part and a second gas producing part which are oppositely arranged, and a first channel through which the gas is formed between the first gas producing part and the second gas producing part can overcome the defect that part cannot move along the arrangement direction of the grid sheets of the arc extinguishing chamber after the arc is generated in the prior art.

Description

Circuit breaker with baffle structure

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker with a partition plate structure.

Background

The main function of the low-voltage circuit breaker arc extinguishing system is to extinguish the arc generated by the contact when the circuit is cut off, and the common arc extinguishing system adopts a duplex structure of arc extinguishing grid plates which are arranged in parallel and in radial mode, wherein the arc generated by the contact breaking is attracted by the steel grid plates after being elongated, and is extinguished rapidly under the strong cooling action and the short arc effect of the grid plates, in the prior art, the arc mostly moves along the arc grooves of the arc extinguishing grid plates, but because the arc is in an irregular moving state after being generated, part of the arc cannot move along the arrangement direction of the arc extinguishing grid plates, so that the arc in the circuit breaker is not extinguished sufficiently.

Disclosure of utility model

Therefore, the technical problem to be solved by the utility model is to overcome the defect that partial arc cannot move along the arrangement direction of the arc extinguishing grid sheet when the arc is in an irregular swimming state after being generated in the prior art, so as to provide the circuit breaker with the partition plate structure, which can push the arc to move.

The utility model provides a circuit breaker with a partition plate structure, which comprises an arc extinguishing chamber body and an arc extinguishing assembly, wherein the arc extinguishing chamber body comprises a first arc extinguishing cavity adjacently arranged in the arc extinguishing chamber body at intervals, the arc extinguishing assembly comprises a first arc extinguishing sheet cluster which is arranged in the first arc extinguishing cavity in a semi-surrounding structure and is formed with a surrounding opening facing the arc extinguishing chamber body, the first arc extinguishing sheet cluster comprises a first vertical grid sheet group which is arranged at the inner end of the first arc extinguishing cavity at intervals along the length direction of the arc extinguishing chamber body, a first inclined grid sheet group and a second inclined grid sheet group which are arranged at the two sides of the first arc extinguishing cavity at intervals along the width direction of the arc extinguishing chamber body, and a gas producing cover is arranged at the opening side of the arc extinguishing chamber body and comprises a first extending assembly which is arranged between the first inclined grid sheet group and the second inclined grid sheet group, the first extending assembly comprises a first gas producing part and a second gas producing part which are oppositely arranged, and a first channel for gas passing through is formed between the first gas producing part and the second gas producing part.

Further, the first gas production part and the second gas production part comprise a first blocking rib and a second blocking rib which are arranged in a T-shaped structure.

The first arc extinguishing sheet cluster is internally provided with an arc groove for feeding an arc to cut the arc, the arc groove comprises a first guide groove with an arc-shaped cross section, second guide grooves positioned at two sides of the first guide groove and third matching grooves positioned at two sides of the second guide groove, the cross section of the second guide groove is rectangular, and the third matching grooves are used for being clamped with the first extension assembly.

Further, the first blocking rib is located in a third matching groove of the first inclined grid plate group and the second inclined grid plate group, and the second blocking rib is located between the first inclined grid plate group and the second inclined grid plate group.

The arc-extinguishing chamber body further comprises a second arc-extinguishing chamber, the arc-extinguishing assembly further comprises a second arc-extinguishing sheet cluster which is arranged in the second arc-extinguishing chamber in a semi-surrounding structure and is formed with a surrounding opening facing the opening of the arc-extinguishing chamber body, the second arc-extinguishing sheet cluster comprises a second vertical grid sheet group which is arranged at the inner end of the second arc-extinguishing chamber at intervals along the length direction of the arc-extinguishing chamber body, and a third inclined grid sheet group and a fourth inclined grid sheet group which are arranged at the two sides of the second arc-extinguishing chamber at intervals along the width direction of the arc-extinguishing chamber body.

The gas production cover further comprises a second extension assembly positioned between the third inclined grid plate group and the fourth inclined grid plate group, the second extension assembly extends to the lower end of the second vertical grid plate group, the second extension assembly comprises a third gas production part and a fourth gas production part which are oppositely arranged, a second channel for gas to pass through is formed in the third gas production part and the fourth gas production part, the third gas production part and the fourth gas production part comprise a third blocking rib and a fourth blocking rib which are arranged in a T-shaped structure, the third blocking rib is positioned in a third matching groove of the third inclined grid plate group and the fourth inclined grid plate group, and the fourth blocking rib is positioned between the third inclined grid plate group and the fourth inclined grid plate group.

Further, an iron block and a containing groove for containing the iron block are arranged in the gas production cover, and an arc-shaped surface for avoiding the moving contact is arranged below the gas production cover.

Further, the first vertical grid plate group, the first inclined grid plate group and the second inclined grid plate group are arranged in a U shape in the first arc extinguishing cavity.

The technical scheme of the utility model has the following advantages:

1. According to the circuit breaker with the partition plate structure, the first arc extinguishing plate clusters are arranged in the first arc extinguishing cavity, the openings of the first arc extinguishing plate clusters are downward, after the moving contact is separated, electric arcs are generated, the electric arcs can enter the first inclined plate clusters, then sequentially pass through the first vertical plate clusters, the second inclined plate clusters, the first inclined plate clusters, the second inclined plate clusters and the first vertical plate clusters, are arranged in an n-shaped structure, because gaps between the first inclined plate clusters and the second inclined plate clusters are small due to space limitation, the problem of arc stringing easily occurs, a gas generating cover is arranged between the first inclined plate clusters and the second inclined plate clusters, the gas generating cover is used for separating the first inclined plate clusters from the second inclined plate clusters, and can generate arc blowing gas when the electric arcs are generated, the gas generating cover comprises a first extending component and a second gas generating component, a gap is formed between the first gas generating part and the second gas generating part, and after the first inclined plate clusters are generated, the first gas generating part and the second inclined plate clusters are moved along the arc generating arc, and the first arc generating part is enabled to be fully blown along the arc generating part.

2. The breaker with the partition plate structure provided by the utility model is composed of the first blocking ribs and the second blocking ribs, a T-shaped structure is formed, the two first blocking ribs are oppositely arranged, a first channel with a distance of 12mm is formed in the middle of the first blocking ribs, the first channel is used for allowing arc blowing gas to pass through, and the two second blocking ribs which are oppositely arranged are inserted into the third matching groove, so that the position of an arc extinguishing grid sheet can be positioned, the space in the first channel is reduced, the air pressure in the first channel is increased, the flow speed of the arc blowing gas is increased, and the arc voltage is effectively enhanced.

3. According to the breaker with the partition plate structure, the second guide grooves are additionally arranged on two sides of the first guide groove, most of electric arcs can move along with corners of the first guide groove and stay on the arc-extinguishing grid sheet due to the fact that the electric arcs are in irregular swimming after being formed, but small parts of electric arcs do not move along the first guide groove, the second guide grooves are additionally arranged on the arc-extinguishing grid sheet, most of electric arcs which do not enter the first guide groove move along the second guide grooves and are cut, and through the arrangement of the second guide grooves, the electric arcs which stay on the arc-extinguishing grid sheet can be guided to move along the second guide grooves, so that effective arc extinction is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of an arc chute in a circuit breaker;

Fig. 2 is a perspective view of an arc extinguishing chamber;

Fig. 3 is a diagram of the positional relationship between the arc chute sheet and the gas generating cover;

fig. 4 is an overall structure diagram of the arc extinguishing gate.

Reference numerals illustrate:

1. The arc extinguishing chamber comprises an arc extinguishing chamber body, 11, a first arc extinguishing chamber, 12, a second arc extinguishing chamber, 301, a first arc extinguishing sheet cluster, 3011, a first inclined grid sheet group, 3012, a second inclined grid sheet group, 3013, a first vertical grid sheet group, 302, a second arc extinguishing sheet cluster, 3021, a third inclined grid sheet group, 3022, a fourth inclined grid sheet group, 3023, a second vertical grid sheet group, 32, an arc groove, 322, a first guide groove, 323, a second guide groove, 324, a third matching groove, 51, a first extension component, 511, a first gas generating part, 512, a second gas generating part, 513, a first channel, 52, a second extension component, 521, a third gas generating part, 522, a fourth gas generating part, 523, a second channel, 53, a first blocking rib, 54, a second blocking rib, 55, a third blocking rib, 56, a fourth blocking rib, 7, an iron block, 71, a containing groove, 72 and an arc surface.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. 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.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of 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," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Examples

The embodiment provides a circuit breaker with a partition plate structure, which comprises an arc extinguishing chamber body 1 and an arc extinguishing assembly, wherein the arc extinguishing chamber body 1 comprises a first arc extinguishing chamber 11 which is adjacently arranged in the arc extinguishing chamber body 11 at intervals, the arc extinguishing assembly comprises a first arc extinguishing sheet cluster 301 which is arranged in the first arc extinguishing chamber body 11 in a semi-surrounding structure and is formed with a surrounding opening facing the opening of the arc extinguishing chamber body 1, the first arc extinguishing sheet cluster 301 comprises a first vertical grid sheet group 3013 which is arranged at the inner end of the first arc extinguishing chamber 11 at intervals along the length direction of the arc extinguishing chamber body 1, a first inclined grid sheet group 3011 and a second inclined grid sheet group 3012 which are arranged at intervals at the two sides of the first arc extinguishing chamber body 11 along the width direction of the arc extinguishing chamber body 1, and a gas generating cover is arranged at the opening side of the arc extinguishing chamber body 1, the gas generating cover comprises a first extension assembly 51 which is arranged between the first inclined grid sheet group 3011 and the second inclined grid sheet group 3012, the first extension assembly 51 comprises a first gas generating part 511 and a second gas generating part 512 which are oppositely arranged, and a first channel 513 through which is formed between the first gas generating part 511 and the second gas generating part 512.

As shown in fig. 1 and 2, the first arc extinguishing chamber 11 is provided with a first arc extinguishing sheet cluster 301, the opening of the first arc extinguishing sheet cluster 301 is downward, after the moving contact is separated, an arc is generated, the arc enters the first inclined grid sheet group 3011, then sequentially passes through the first vertical grid sheet group 3013, the second inclined grid sheet group 3012, the first inclined grid sheet group 3011, the second inclined grid sheet group 3012 and the first vertical grid sheet group 3013, and is in an n-shaped structure, the gas generating cover comprises a first extension component 51, the first extension component comprises a first gas generating part 511 and a second gas generating part 512, a gap is formed between the first gas generating part 511 and the second gas generating part 512 to form a first channel 513, and after the arc is generated, the first gas generating part 511 and the second gas generating part 512 generate arc blowing gas, and the arc blowing gas flows along the first channel 513, so that the arc is driven to move along the first inclined grid sheet group 3011 and the second inclined grid sheet group 3012, and the arc is fully extinguished.

On the basis of the above embodiment, the first gas generating part 511 and the second gas generating part 512 include a first rib 53 and a second rib 54 which are arranged in a T-shaped structure.

The specific improvement is that, as shown in fig. 3, the first extension component 51 includes a first gas generating portion 511 and a second gas generating portion 512, the structures of the first gas generating portion 511 and the second gas generating portion 512 are consistent, the first gas generating portion 511 is composed of a first blocking rib 53 and a second blocking rib 54, a T-shaped structure is formed, the two first blocking ribs 53 are oppositely arranged, a first channel 513 with a distance of 12mm is formed in the middle, the first channel 513 is used for allowing arc blowing gas to pass through, and the two second blocking ribs 54 oppositely arranged are inserted into the third matching groove 324, so that the space in the first channel 513 is smaller, the air pressure in the first channel is larger, the flow rate of the arc blowing gas is faster, and the arc voltage is effectively enhanced.

On the basis of the embodiment, the first arc extinguishing sheet cluster 301 is internally provided with an arc groove 32 for feeding an arc to cut the arc, the arc groove 32 comprises a first guide groove 322 with an arc-shaped cross section, second guide grooves 323 positioned at two sides of the first guide groove 322 and third matching grooves 324 positioned at two sides of the second guide groove 323, the cross section of the second guide groove 323 is rectangular, and the third matching grooves 324 are used for being clamped with the first extension assembly 51.

The specific improvement is that, as shown in fig. 4, the first inclined grid plate group 3011 and the second inclined grid plate group 3012 are all inclined at 0-90 degrees, after the arc is generated, the arc is guided to the arc groove 32 of the first inclined grid plate group 3011 through the arc inlet 15 and the second equipotential grid plate 16, then sequentially passes through the first vertical grid plate group 3013, the second inclined grid plate group 3012 and the arc collecting position at the arc groove 32 of the arc extinguishing grid plate 31, the arc extinguishing grid plate 31 is provided with the first guide groove 322 and the second guide grooves 323 positioned at two sides of the first guide groove 322, the second guide grooves 323 are added at two sides of the first guide groove 322, and after the arc is generated, in an irregular state, most of the arc moves along with the corners of the first guide groove 322, but a small part does not move along the first guide groove 322 to stay on the arc extinguishing grid plate 31, a large part of the arc does not enter the first guide groove 322 moves along the second guide groove 323 to the second guide groove 323, so that the arc extinguishing grid 323 can move along the second guide groove 323, and the arc extinguishing grid 323 can move along the second guide groove 323.

On the basis of the embodiment, the first blocking ribs 53 are located in the third matching grooves 324 of the first inclined grid plate group 3011 and the second inclined grid plate group 3012, and the second blocking ribs 54 are located between the first inclined grid plate group 3011 and the second inclined grid plate group 3012.

The specific improvement is that, as shown in fig. 3, the first gas generating part 511 and the second gas generating part 512 are composed of a first blocking rib 53 and a second blocking rib 54, a T-shaped structure is formed, the two first blocking ribs 53 are oppositely arranged, a first channel 513 with a distance of 12mm is formed in the middle, the smaller the space in the first channel 513 is, the larger the air pressure in the first channel is, so that the faster the flow speed of arc blowing gas is, and the arc voltage is effectively enhanced.

On the basis of the embodiment, the arc extinguishing chamber body 1 further comprises a second arc extinguishing chamber 12, the arc extinguishing assembly further comprises a second arc extinguishing sheet cluster 302 which is arranged in the second arc extinguishing chamber 12 in a semi-surrounding structure and formed with surrounding openings facing the opening of the arc extinguishing chamber body 1, the second arc extinguishing sheet cluster 302 comprises a second vertical grid sheet group 3023 which is arranged at the inner end of the second arc extinguishing chamber 12 at intervals along the length direction of the arc extinguishing chamber body 1, and a third inclined grid sheet group 3021 and a fourth inclined grid sheet group 3022 which are arranged at the two sides of the second arc extinguishing chamber 12 at intervals along the width direction of the arc extinguishing chamber body 1.

The specific improvement is that, as shown in fig. 2, the arc-extinguishing chamber body 1 further comprises a second arc-extinguishing chamber 12, the arc-extinguishing chamber body comprises a first arc-extinguishing chamber 11 and a second arc-extinguishing chamber 12 which are adjacently arranged, a second arc-extinguishing plate cluster 302 is arranged in the second arc-extinguishing chamber 12, the opening of the second arc-extinguishing plate cluster 302 is downward, and an arc guiding structure for guiding an arc in the first arc-extinguishing plate cluster 301 to the second arc-extinguishing plate cluster 302 is connected between the first arc-extinguishing plate cluster 301 and the second arc-extinguishing plate cluster 302, and through the arrangement of the first arc-extinguishing plate cluster 301, the second arc-extinguishing plate cluster 302 and the arc guiding structure, the size of the arc-extinguishing chamber body 1 is the same as that of a circuit breaker in the prior art, when a product is manufactured, the die and the test do not need to be restarted, and the effective cost can be saved), so that the number of arc-extinguishing gate plates 31 can be greatly increased, and a sufficient arc-extinguishing path is achieved (for example, the arc-extinguishing chamber in the prior art can only be provided with 30-40 plates at most, and the third inclined gate 30260-30260 can reach a third inclined gate group 3023 and a fourth inclined gate electrode group 3 and a vertical gate group 3 and a vertical structure.

On the basis of the embodiment, the gas generating cover further comprises a second extension assembly 52 located between the third inclined grid plate group 3021 and the fourth inclined grid plate group 3022, the second extension assembly 52 extends to the lower end of the second vertical grid plate group 3023, the second extension assembly 52 comprises a third gas generating portion 521 and a fourth gas generating portion 522 which are oppositely arranged, a second channel 523 for passing gas is formed in the third gas generating portion 521 and the fourth gas generating portion 522, the third gas generating portion 521 and the fourth gas generating portion 522 comprise a third blocking rib 55 and a fourth blocking rib 56 which are arranged in a T-shaped structure, the third blocking rib 55 is located in a third matching groove 324 of the third inclined grid plate group 3021 and the fourth inclined grid plate group 3022, and the fourth blocking rib 56 is located between the third inclined grid plate group 3021 and the fourth inclined grid plate group 3022.

The specific improvement is as follows: the first inclined grid set 3011, the second inclined grid set 3012, the third inclined grid set 3021 and the fourth inclined grid set 3022 are all inclined at 0-90 degrees, after an arc is generated, the arc is led to the arc groove 32 of the first inclined grid set 3011 through the second equipotential grid 16 by the arc inlet 15, then sequentially passes through the first vertical grid set 3013, the second inclined grid set 3012, the first equipotential grid 4 to reach the third inclined grid set 3021, the second vertical grid set 3023 and finally the fourth inclined grid set 3022, thereby completing the whole arc extinguishing process, the arc collecting position is at the arc groove 32 of the arc extinguishing grid 31, the arc extinguishing grid 31 is provided with the first guide groove 322 and the second guide groove 323 positioned at two sides of the first guide groove 322, the second guide groove 323 is added at two sides of the first guide groove 322, in an irregularly moving state, most of the electric arc moves along the corners of the first guide groove 322, but a small part of the electric arc does not move along the first guide groove 322 and stays on the arc extinguishing grid plate 31, a second guide groove 323 is additionally arranged on the arc extinguishing grid plate 31, most of the electric arc which does not enter the first guide groove 322 moves along the second guide groove 323 and is cut, the electric arc staying on the arc extinguishing grid plate 31 can be guided to move along the second guide groove 323 by the arrangement of the second guide groove 323, effective arc extinguishing is achieved, the gas generating cover 5 comprises a first extension assembly 51 and a second extension assembly 52, the first extension assembly 51 comprises a first gas generating part 511 and a second gas generating part 512, the structures of the first gas generating part 511 and the second gas generating part 512 are consistent, the first gas generating part 511 and the second gas generating part 512 are composed of a first blocking rib 53 and a second blocking rib 54, the two first blocking ribs 53 are oppositely arranged, a first channel 513 with a distance of 12mm is formed in the middle, the two fourth blocking ribs 56 are oppositely arranged, a second channel 523 with a distance of 12mm is formed in the middle, the first channel 513 and the second channel 523 (namely, 2 gas producing channels are formed between the gas producing cover 5 and the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12) are used for the passage of arc blowing gas, and the two second blocking ribs 54 and the two fourth blocking ribs 56 which are oppositely arranged are inserted into the third matching groove 324, so that the space between the first channel 513 and the second channel 523 is reduced, the smaller the space between the first channel 513 and the second channel 523 is, the larger the air pressure in the first channel 513 and the second channel 523 is, and the faster the flow speed of the arc blowing gas is, so that the arc blowing voltage is effectively enhanced.

On the basis of the embodiment, an iron block 7 and a containing groove 71 for containing the iron block 7 are arranged in the gas generating cover 5, and an arc-shaped surface 72 for avoiding the moving contact 102 is arranged below the gas generating cover 5.

The specific improvement is that the first gas generating part 511, the third gas generating part 521, the second gas generating part 512 and the fourth gas generating part 522 respectively form a gas generating whole, an iron block 7 is respectively arranged in the middle of the two gas generating whole, and the magnetism of the middle parts of the two iron blocks 7 can be enhanced through the opposite arrangement of the two iron blocks 7, so that electric arcs are gathered together, and the whole gas generating part is conveniently attracted into the electric arc channel 14.

On the basis of the above embodiment, the first vertical gate group 3013, the first inclined gate group 3011 and the second inclined gate group 3012 are arranged in a U shape in the first arc extinguishing chamber 11.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A circuit breaker with a partition structure is characterized by comprising:

the arc extinguishing chamber body (1) comprises first arc extinguishing chambers (11) which are adjacently arranged in the arc extinguishing chamber body at intervals;

The arc extinguishing assembly comprises a first arc extinguishing sheet cluster (301) which is arranged in a first arc extinguishing cavity (11) in a semi-surrounding structure and is formed with a surrounding opening which is opened towards an arc extinguishing chamber body (1), wherein the first arc extinguishing sheet cluster (301) comprises a first vertical grid sheet group (3013) which is arranged at the inner end of the first arc extinguishing cavity (11) at intervals along the length direction of the arc extinguishing chamber body (1), and a first inclined grid sheet group (3011) and a second inclined grid sheet group (3012) which are arranged at the two sides of the first arc extinguishing cavity (11) at intervals along the width direction of the arc extinguishing chamber body (1);

The gas generating cover is arranged on the opening side of the arc extinguishing chamber body (1), and comprises a first extending component between a first inclined grid plate group (3011) and a second inclined grid plate group (3012), wherein the first extending component (51) comprises a first gas generating part (511) and a second gas generating part (512) which are oppositely arranged, and a first channel (513) for gas to pass through is formed between the first gas generating part (511) and the second gas generating part (512).

2. The circuit breaker with the partition structure according to claim 1, wherein the first gas generating portion (511) and the second gas generating portion (512) comprise a first rib (53) and a second rib (54) which are arranged in a T-shaped structure.

3. The circuit breaker with partition plate structure according to claim 2, wherein the first arc extinguishing sheet cluster (301) is internally provided with an arc groove (32) for supplying an arc to cut the arc, the arc groove (32) comprises a first guide groove (322) with an arc-shaped cross section, second guide grooves (323) positioned at two sides of the first guide groove (322) and third matching grooves (324) positioned at two sides of the second guide groove (323), the cross section of the second guide groove (323) is rectangular, and the third matching grooves (324) are used for being clamped with the first extension assembly (51).

4. A circuit breaker with a spacer structure as in claim 3 wherein said first rib (53) is located in a third mating slot (324) of the first (3011) and second (3012) inclined grid sets and said second rib (54) is located between the first (3011) and second (3012) inclined grid sets.

5. The circuit breaker with a partition structure according to any one of claims 1 to 4, wherein the arc extinguishing chamber body (1) further comprises a second arc extinguishing chamber (12), the arc extinguishing assembly further comprises a second arc extinguishing sheet cluster (302) which is arranged in the second arc extinguishing chamber (12) in a semi-surrounding structure and is formed with a surrounding opening towards the arc extinguishing chamber body (1), the second arc extinguishing sheet cluster (302) comprises a second vertical grid sheet group (3023) which is arranged at the inner end of the second arc extinguishing chamber (12) at intervals along the length direction of the arc extinguishing chamber body (1), and a third inclined grid sheet group (3021) and a fourth inclined grid sheet group (3022) which are arranged at both sides of the second arc extinguishing chamber (12) at intervals along the width direction of the arc extinguishing chamber body (1).

6. The circuit breaker with partition structure according to claim 5, wherein the gas generating cover further comprises a second extension assembly (52) located between a third inclined grid plate group (3021) and a fourth inclined grid plate group (3022), the second extension assembly (52) extends to the lower end of the second vertical grid plate group (3023), the second extension assembly (52) comprises a third gas generating portion (521) and a fourth gas generating portion (522) which are oppositely arranged, the third gas generating portion (521) and the fourth gas generating portion (522) are formed with a second channel (523) through which gas passes, the third gas generating portion (521) and the fourth gas generating portion (522) comprise a third blocking rib (55) and a fourth blocking rib (56) which are arranged in a T-shaped structure, the third blocking rib (55) is located in a third matching groove (324) of the third inclined grid plate group (3021) and the fourth inclined grid plate group (3022), and the fourth blocking rib (30256) is located between the third inclined grid plate group (3021) and the fourth inclined grid plate group (3022).

7. The circuit breaker with the partition plate structure according to claim 6, wherein an iron block (7) and a containing groove (71) for containing the iron block (7) are arranged in the gas generating cover (5), and an arc-shaped surface (72) for avoiding the moving contact (102) is arranged below the gas generating cover (5).

8. The circuit breaker with the partition plate structure according to claim 7, wherein the first vertical grid plate group (3013), the first inclined grid plate group (3011) and the second inclined grid plate group (3012) are arranged in a U shape in the first arc extinguishing chamber (11).