Circuit breaker with separator plate structure

Abstract

The utility model provides a circuit breaker with a separator plate structure, comprising an arc extinguish chamber body which comprises first arc extinguish cavities arranged in the arc extinguish chamber body at intervals; the arc extinguishing assembly comprises a first arc extinguishing piece cluster, and the first arc extinguishing piece cluster comprises a first vertical grid piece group which is arranged at the inner end of the first arc extinguishing cavity at an interval along the length direction of the arc extinguishing chamber body, and a first inclined grid piece group and a second inclined grid piece group which are arranged at two sides of the first arc extinguishing cavity at an interval along the width direction of the arc extinguishing chamber body; 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 gas generation cover is installed on the opening side of the arc extinguishing chamber body and comprises a first extension assembly, and the first extension assembly comprises a first gas generation part and a second gas generation part which are oppositely arranged; and a first channel for gas to pass through is formed between the first gas generation part and the second gas generation part, so that the circuit breaker can overcome the defect that in the prior art, after being generated, electric arcs are in an irregular moving state, and part of the electric arcs cannot move in the arrangement direction of the arc extinguishing grid plates.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a circuit breaker with a partition structure. Background Art

[0002] The main function of the arc extinguishing system of a low-voltage circuit breaker is to extinguish the arc generated by the contacts when the circuit is cut off. Generally, the more commonly used arc extinguishing systems adopt a duplex structure of arc extinguishing grids arranged in parallel and radially: the arc generated when the contacts are disconnected is attracted by the steel grid after being elongated, and is quickly extinguished under the strong cooling effect of the grid and the short arc effect. In the prior art, the arc mostly moves along the arc groove of the arc extinguishing grid, but because the arc is in an irregular wandering state after being generated, part of the arc cannot move along the setting direction of the arc extinguishing grid, resulting in the arc in the circuit breaker not being fully extinguished. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defect in the prior art that the arc is in an irregular wandering state after being generated, and part of the arc cannot move along the setting direction of the arc extinguishing grid, thereby providing a circuit breaker with a partition structure that can promote the movement of the arc.

[0004] To this end, the utility model provides a circuit breaker with a partition structure, comprising: an arc extinguishing chamber body, comprising a first arc extinguishing chamber arranged adjacently at intervals therein; an arc extinguishing assembly, comprising a first arc extinguishing plate cluster arranged in a semi-enclosed structure in the first arc extinguishing chamber and with the enclosed opening formed facing the arc extinguishing chamber body, the first arc extinguishing plate cluster comprising a first vertical grid group arranged at an inner end of the first arc extinguishing chamber at intervals along the length direction of the arc extinguishing chamber body, and a first inclined grid group and a second inclined grid group arranged at both sides of the first arc extinguishing chamber at intervals along the width direction of the arc extinguishing chamber body, a gas generating hood, installed on the opening side of the arc extinguishing chamber body, comprising a first extending assembly arranged between the first inclined grid group and the second inclined grid group, the first extending assembly comprising a first gas producing portion and a second gas producing portion arranged opposite to each other, and a first channel for gas to pass through is formed between the first gas producing portion and the second gas producing portion.

[0005] Further: the first gas producing part and the second gas producing part include a first retaining rib and a second retaining rib arranged in a "T"-shaped structure.

[0006] Further: the first arc extinguishing plate cluster has an arc groove for the power supply arc to enter and cut the arc, the arc groove includes a first guide groove with an arc-shaped cross-section, a second guide groove located on both sides of the first guide groove, and a third matching groove located on both sides of the second guide groove, the second guide groove has a rectangular cross-section, and the third matching groove is used to be clamped with the first extension component.

[0007] Furthermore: the first blocking rib is located in the 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.

[0008] Further: the arc extinguishing chamber body also includes a second arc extinguishing chamber, the arc extinguishing assembly also includes a second arc extinguishing plate cluster arranged in the second arc extinguishing chamber in a semi-enclosed structure and the enclosed opening formed is open to the arc extinguishing chamber body, the second arc extinguishing plate cluster includes a second vertical grid plate group arranged at an interval along the length direction of the arc extinguishing chamber body at the inner end of the second arc extinguishing chamber, and a third inclined grid plate group and a fourth inclined grid plate group arranged at both sides of the second arc extinguishing chamber at an interval along the width direction of the arc extinguishing chamber body.

[0009] Further: the gas producing hood also includes a second extension component located between the third inclined grid plate group and the fourth inclined grid plate group, the second extension component extends to the lower end of the second vertical grid plate group, the second extension component includes a third gas producing part and a fourth gas producing part arranged opposite to each other, the third gas producing part and the fourth gas producing part form a second channel for gas to pass through, the third gas producing part and the fourth gas producing part include a third barrier rib and a fourth barrier rib arranged in a "T" shape structure, the third barrier rib is located in the third matching groove of the third inclined grid plate group and the fourth inclined grid plate group, and the fourth barrier rib is located between the third inclined grid plate group and the fourth inclined grid plate group.

[0010] Furthermore: an iron block and a receiving groove for receiving the iron block are arranged in the gas generating hood, and an arc surface for avoiding the moving contact is provided at the bottom of the gas generating hood.

[0011] Furthermore: the first vertical grid segment group, the first inclined grid segment group and the second inclined grid segment group are arranged in a U shape in the first arc extinguishing chamber.

[0012] The technical solution of the utility model has the following advantages:

[0013] 1. The utility model provides a circuit breaker with a partition structure, wherein a first arc extinguishing plate cluster is arranged in a first arc extinguishing cavity, and the first arc extinguishing plate cluster opens downward. After the moving and static contacts are disconnected, an arc is generated, and the arc enters the first inclined grid group, and then passes through the first vertical grid group, the second inclined grid group, the first inclined grid group, the second inclined grid group, and the first vertical grid group in an "n"-shaped structure. Since the gap between the first inclined grid group and the second inclined grid group is small due to space limitations, arc crossover is likely to occur. Therefore, a gas producing hood is arranged between the first inclined grid and the second inclined grid, which is used to separate the first inclined grid and the second inclined grid and can generate arc blowing gas when an arc is generated. The gas producing hood includes a first extension component, which includes a first gas producing part and a second gas producing part. A gap is provided between the first gas producing part and the second gas producing part to form a first channel. After an arc is generated, the first gas producing part and the second gas producing part will generate arc blowing gas, thereby moving the arc along the first inclined grid group and the second inclined grid group, so that the arc is fully extinguished.

[0014] 2. The utility model provides a circuit breaker with a partition structure, which is composed of a first barrier rib and a second barrier rib to form a "T"-shaped structure, and the two first barrier ribs are arranged opposite to each other, forming a first channel with a spacing of 12 mm in the middle, and the first channel is used for arc blowing gas to pass through, and the two second barrier ribs arranged opposite to each other are inserted in the third matching groove, which can not only locate the position of the arc extinguishing grid, but also make the space in the first channel smaller, the greater the internal air pressure, and the faster the flow rate of the arc blowing gas, which effectively enhances the arc voltage.

[0015] 3. The utility model provides a circuit breaker with a partition structure, in which second guide grooves are added on both sides of the first guide groove. After the arc is formed, it is in an irregular wandering state, and most of the arc will move along the corners of the first guide groove. However, there will still be a small part of the arc that does not move along the first guide groove and thus stays on the arc extinguishing grid. A second guide groove is added to the arc extinguishing grid, and most of the arc that has not entered the first guide groove will move along the second guide groove, so that the arc will be cut. Through the setting of the second guide groove, the arc staying on the arc extinguishing grid can be guided to move along the second guide groove, thereby effectively extinguishing the arc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the arc extinguishing chamber in the circuit breaker;

[0018] Figure 2 It is a three-dimensional structural diagram of the arc extinguishing chamber;

[0019] Figure 3 The diagram is a positional relationship diagram between the arc extinguishing grid and the gas generating hood;

[0020] Figure 4 This is the overall structure diagram of the arc extinguishing grid.

[0021] Description of reference numerals:

[0022] 1. Arc extinguishing chamber body; 11. First arc extinguishing chamber; 12. Second arc extinguishing chamber; 301. First arc extinguishing plate cluster; 3011. First inclined grid plate group; 3012. Second inclined grid plate group; 3013. First vertical grid plate group; 302. Second arc extinguishing plate cluster; 3021. Third inclined grid plate group; 3022. Fourth inclined grid plate group; 3023. Second vertical grid plate group; 32. Arc slot; 322. First guide slot; 323. The second guide groove; 324, the third matching groove; 51, the first extension component; 511, the first gas producing part; 512, the second gas producing part; 513, the first channel; 52, the second extension component; 521, the third gas producing part; 522, the fourth gas producing part; 523, the second channel; 53, the first retaining rib; 54, the second retaining rib; 55, the third retaining rib; 56, the fourth retaining rib; 7, the iron block; 71, the receiving groove; 72, the arc surface. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Example

[0028] The present embodiment provides a circuit breaker with a partition structure, comprising: an arc extinguishing chamber body 1, comprising a first arc extinguishing chamber 11 arranged adjacently at intervals therein; an arc extinguishing assembly, comprising a first arc extinguishing plate cluster 301 arranged in a semi-enclosed structure in the first arc extinguishing chamber 11 and with the enclosed opening formed facing the arc extinguishing chamber body 1, wherein the first arc extinguishing plate cluster 301 comprises a first vertical grid plate group 3013 arranged at intervals along the length direction of the arc extinguishing chamber body 1 at the inner end of the first arc extinguishing chamber 11, and a first inclined grid plate group 3011 and a second inclined grid plate group 3012 arranged at intervals on both sides of the first arc extinguishing chamber 11 along the width direction of the arc extinguishing chamber body 1; a gas generating hood installed on the opening side of the arc extinguishing chamber body 1, comprising a first extending assembly 51 arranged between the first inclined grid plate group 3011 and the second inclined grid plate group 3012, wherein the first extending assembly 51 comprises a first gas producing portion 511 and a second gas producing portion 512 arranged opposite to each other, and a first channel 513 for gas to pass through is formed between the first gas producing portion 511 and the second gas producing portion 512.

[0029] The above specific improvements are: Figure 1 and Figure 2As shown, a first arc extinguishing plate cluster 301 is arranged in the first arc extinguishing cavity 11, and the opening of the first arc extinguishing plate cluster 301 faces downward. After the moving and static contacts are disconnected, an arc is generated, and the arc will enter the first inclined grid plate group 3011, and then pass through the first vertical grid plate group 3013, the second inclined grid plate group 3012, the first inclined grid plate group 3011, the second inclined grid plate group 3012 and the first vertical grid plate group 3013 in sequence in an "n" type structure. The gas generating hood includes a first extension component 51, which includes a first gas generating part 511 and a second gas generating part 512. A gap is provided between the first gas generating part 511 and the second gas generating part 512 to form a first channel 513. After an arc is generated, the first gas generating part 511 and the second gas generating part 512 will generate arc blowing gas, and the arc blowing gas flows along the first channel 513, thereby driving the arc to move along the first inclined grid plate group 3011 and the second inclined grid plate group 3012, so that the arc is fully extinguished.

[0030] On the basis of the above embodiment: the first gas producing part 511 and the second gas producing part 512 include a first blocking rib 53 and a second blocking rib 54 arranged in a “T”-shaped structure.

[0031] The above specific improvements are: Figure 3 As shown, the first extension component 51 includes a first gas producing part 511 and a second gas producing part 512. The structures of the first gas producing part 511 and the second gas producing part 512 are consistent. The first gas producing part 511 is composed of a first retaining rib 53 and a second retaining rib 54 to form a "T"-shaped structure, and the two first retaining ribs 53 are arranged opposite to each other, forming a first channel 513 with a spacing of 12 mm in the middle. The first channel 513 is used for the passage of arc blowing gas, and the two second retaining ribs 54 arranged opposite to each other are inserted in the third matching groove 324, so that the space in the first channel 513 becomes smaller, the air pressure inside it is greater, and the flow rate of the arc blowing gas is faster, thereby effectively enhancing the arc voltage.

[0032] On the basis of the above embodiment: the first arc extinguishing plate cluster 301 has an arc slot 32 for the power arc to enter and cut the arc, the arc slot 32 includes a first guide slot 322 with an arc-shaped cross-section, second guide slots 323 located on both sides of the first guide slot 322, and third matching slots 324 located on both sides of the second guide slot 323, the second guide slot 323 has a rectangular cross-section, and the third matching slot 324 is used to engage with the first extension component 51.

[0033] The above specific improvements are: Figure 4As shown, the first inclined grid group 3011 and the second inclined grid group 3012 are both inclined at 0-90 degrees. When an arc is generated, the arc passes through the arc inlet 15, and is guided to the arc groove 32 of the first inclined grid group 3011 by the second equipotential grid 16, and then passes through the first vertical grid group 3013, the second inclined grid group 3012, and the arc is collected at the arc groove 32 of the arc extinguishing grid 31. The arc extinguishing grid 31 is provided with a first guide groove 322 and a second guide groove 323 located on both sides of the first guide groove 322. The second guide groove 323 is provided. After the arc is formed, it is in an irregular wandering state. Most of the arc will move along the corners of the first guide groove 322. However, a small part of the arc will not move along the first guide groove 322 and will remain on the arc extinguishing grid 31. A second guide groove 323 is provided on the arc extinguishing grid 31. Most of the arc that has not entered the first guide groove 322 will move along the second guide groove 323 and the arc will be cut. Through the provision of the second guide groove 323, the arc remaining on the arc extinguishing grid 31 can be guided to move along the second guide groove 323, thereby effectively extinguishing the arc.

[0034] On the basis of the above embodiment: the first retaining rib 53 is located in the third matching groove 324 of the first inclined grid plate group 3011 and the second inclined grid plate group 3012 , and the second retaining rib 54 is located between the first inclined grid plate group 3011 and the second inclined grid plate group 3012 .

[0035] The above specific improvements are: Figure 3 The first gas generating part 511 and the second gas generating part 512 are composed of a first retaining rib 53 and a second retaining rib 54, forming a "T"-shaped structure, and the two first retaining ribs 53 are arranged opposite to each other, forming a first channel 513 with a spacing of 12 mm in the middle. The smaller the space in the first channel 513, the greater the gas pressure inside it, so that the flow rate of the arc blowing gas is faster, which effectively enhances the arc voltage.

[0036] On the basis of the above embodiment: the arc extinguishing chamber body 1 also includes a second arc extinguishing chamber 12, the arc extinguishing assembly also includes a second arc extinguishing plate cluster 302 which is arranged in a semi-enclosed structure in the second arc extinguishing chamber 12 and the enclosed opening formed is open to the arc extinguishing chamber body 1, the second arc extinguishing plate cluster 302 includes a second vertical grid plate group 3023 arranged at an interval along the length direction of the arc extinguishing chamber body 1 at the inner end of the second arc extinguishing chamber 12, and a third inclined grid plate group 3021 and a fourth inclined grid plate group 3022 arranged at both sides of the second arc extinguishing chamber 12 at an interval along the width direction of the arc extinguishing chamber body 1.

[0037] The above specific improvements are: Figure 2As shown, the arc extinguishing chamber body 1 also includes a second arc extinguishing chamber 12, and the arc extinguishing body includes a first arc extinguishing chamber 11 and a second arc extinguishing chamber 12 arranged adjacent to each other, and a second arc extinguishing plate cluster 302 is provided in the second arc extinguishing chamber 12, and the opening of the second arc extinguishing plate cluster 302 faces downward, and an arc guide structure for guiding the 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. By arranging the first arc extinguishing plate cluster 301, the second arc extinguishing plate cluster 302 and the arc guide structure, it is possible to manufacture the product without expanding the arc extinguishing chamber 1 body (the size of the arc extinguishing chamber 1 body 1 is the same as that of the circuit breaker in the prior art, and it is not necessary to re-open the mold and test when manufacturing the product, and it can be On the basis of effective cost savings), the number of arc extinguishing grids 31 can be greatly increased, and the arc extinguishing path can be effectively extended, so as to achieve the effect of sufficient arc extinguishing (for example, the arc extinguishing chamber in the prior art can only be equipped with 30-40 grids at most, while 60-70 grids can be arranged in this embodiment), through the first equipotential grid 4 to reach the third inclined grid group 3021, the second vertical grid group 3023, and finally through the fourth inclined grid group 3022, so as to complete the entire arc extinguishing process, the third inclined grid group 3021, the fourth inclined grid group 3022 and the second vertical grid group 3023 are arranged in an "n" type structure, and the two are connected by an arc guide structure to form an "M" type path.

[0038] On the basis of the above embodiment: the gas producing hood also includes a second extension component 52 located between the third inclined grid plate group 3021 and the fourth inclined grid plate group 3022, the second extension component 52 extends to the lower end of the second vertical grid plate group 3023, the second extension component 52 includes a third gas producing part 521 and a fourth gas producing part 522 arranged opposite to each other, the third gas producing part 521 and the fourth gas producing part 522 form a second channel 523 for gas to pass through, the third gas producing part 521 and the fourth gas producing part 522 include a third blocking rib 55 and a fourth blocking rib 56 arranged in a "T" shape structure, the third blocking rib 55 is located in the 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.

[0039] The above specific improvement is: the first inclined grid group 3011, the second inclined grid group 3012, the third inclined grid group 3021 and the fourth inclined grid group 3022 are all inclined at 0-90 degrees. When the arc is generated, the arc passes through the arc inlet 15, and is guided to the arc slot 32 of the first inclined grid group 3011 by the second equipotential grid 16, and then passes through the first vertical grid group 3013, the second inclined grid group 3012, the first equipotential grid 4 to the third inclined grid group 3021, the second vertical grid group 3023, and finally passes through the fourth inclined grid group 3022, thereby completing the entire arc extinguishing process. The arcs converge at the arc groove 32 of the arc extinguishing grid 31. The arc extinguishing grid 31 is provided with a first guide groove 322 and second guide grooves 323 located on both sides of the first guide groove 322. The second guide grooves 323 are added on both sides of the first guide groove 322. Since the arc is in an irregularly moving state after being formed, most of the arcs will move along the corners of the first guide groove 322, but a small part of the arcs will not move along the first guide groove 322 and will stay on the arc extinguishing grid 31. The second guide groove 323 is added to the arc extinguishing grid 31, and most of the arcs that have not entered the first guide groove 322 will move along the second guide groove 323. Thus, the arc will be cut. By setting the second guide groove 323, the arc staying on the arc extinguishing grid 31 can be guided to move along the second guide groove 323 to effectively extinguish the arc. The gas generating hood 5 includes a first extension component 51 and a second extension component 52. The first extension component 51 includes a first gas generating portion 511 and a second gas generating portion 512. The first gas generating portion 511 and the second gas generating portion 512 have the same structure. The first gas generating portion 511 and the second gas generating portion 512 are composed of a first retaining rib 53 and a second retaining rib 54 to form a "T"-shaped structure. The two first retaining ribs 53 are arranged opposite to each other, and a first channel 513 with a spacing of 12 mm is formed in the middle. It can be concluded that the two fourth blocking ribs 56 are arranged opposite to each other, and a second channel 523 with a spacing of 12 mm is formed in the middle (that is, two gas production channels are formed between the gas production hood 5 and the first arc extinguishing chamber 11 and the second arc extinguishing chamber 12 mentioned above). The first channel 513 and the second channel 523 are used for the passage of arc blowing gas, and the two second blocking ribs 54 and the two fourth blocking ribs 56 are arranged opposite to each other and inserted in 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 inside the first channel 513 and the second channel 523, the greater the internal air pressure, so that the flow rate of the arc blowing gas is faster, which effectively enhances the arc voltage.

[0040] On the basis of the above embodiment: an iron block 7 and a receiving groove 71 for receiving the iron block 7 are arranged in the gas generating hood 5 , and an arc surface 72 for avoiding the moving contact 102 is provided at the bottom of the gas generating hood 5 .

[0041] The above-mentioned specific improvements are as follows: the first gas producing part 511 and the third gas producing part 521 and the second gas producing part 512 and the fourth gas producing part 522 respectively form a gas producing whole, and there is an iron block 7 in the middle of each of the two gas producing parts. By arranging the two iron blocks 7 relative to each other, the magnetism of the middle part of the two iron blocks 7 can be enhanced, and the arc can be gathered together, so that the whole can be attracted into the arc channel 14.

[0042] On the basis of the above embodiment: the first vertical grid group 3013 , the first inclined grid group 3011 and the second inclined grid group 3012 are arranged in a U shape in the first arc extinguishing chamber 11 .

[0043] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A circuit breaker with a partition structure, characterized in that: include: An arc extinguishing chamber body (1) comprises first arc extinguishing chambers (11) arranged inside the arc extinguishing chamber body at adjacent intervals; An arc extinguishing assembly, comprising a first arc extinguishing plate cluster (301) arranged in a semi-enclosed structure in a first arc extinguishing chamber (11) and with the enclosed opening formed facing the arc extinguishing chamber body (1), the first arc extinguishing plate cluster (301) comprising a first vertical grid plate group (3013) arranged at intervals at the inner end of the first arc extinguishing chamber (11) along the length direction of the arc extinguishing chamber body (1), and a first inclined grid plate group (3011) and a second inclined grid plate group (3012) arranged at intervals at both sides of the first arc extinguishing chamber (11) along the width direction of the arc extinguishing chamber body (1); A gas generating hood is installed on the open side of the arc extinguishing chamber body (1), and comprises a first extension component between a first inclined grid plate group (3011) and a second inclined grid plate group (3012), wherein the first extension component (51) comprises a first gas generating portion (511) and a second gas generating portion (512) arranged opposite to each other, and a first channel (513) for gas to pass through is formed between the first gas generating portion (511) and the second gas generating portion (512).

2. A circuit breaker with a partition structure according to claim 1, characterized in that: The first gas producing portion (511) and the second gas producing portion (512) comprise a first retaining rib (53) and a second retaining rib (54) arranged in a "T"-shaped structure.

3. A circuit breaker with a partition structure according to claim 2, characterized in that: The first arc extinguishing plate cluster (301) has an arc slot (32) for a power supply arc to enter and cut the arc, the arc slot (32) comprising a first guide slot (322) having an arc-shaped cross section, second guide slots (323) located on both sides of the first guide slot (322), and third matching slots (324) located on both sides of the second guide slot (323), the second guide slot (323) having a rectangular cross section, and the third matching slot (324) being used for engaging with the first extension component (51).

4. A circuit breaker with a partition structure according to claim 3, characterized in that: The first retaining rib (53) is located in the third matching groove (324) of the first inclined grid plate group (3011) and the second inclined grid plate group (3012), and the second retaining rib (54) is located between the first inclined grid plate group (3011) and the second inclined grid plate group (3012).

5. A circuit breaker with a partition structure according to any one of claims 1 to 4, characterized in that: The arc extinguishing chamber body (1) further comprises a second arc extinguishing chamber (12), the arc extinguishing assembly further comprises a second arc extinguishing plate cluster (302) arranged in the second arc extinguishing chamber (12) in a semi-enclosed structure and with the enclosed opening formed facing the arc extinguishing chamber body (1), the second arc extinguishing plate cluster (302) comprising a second vertical grid plate group (3023) arranged at intervals at the inner end of the second arc extinguishing chamber (12) along the length direction of the arc extinguishing chamber body (1), and a third inclined grid plate group (3021) and a fourth inclined grid plate group (3022) arranged at intervals at both sides of the second arc extinguishing chamber (12) along the width direction of the arc extinguishing chamber body (1).

6. A circuit breaker with a partition structure according to claim 5, characterized in that: The gas generating hood further comprises a second extension component (52) located between the third inclined grid plate group (3021) and the fourth inclined grid plate group (3022), the second extension component (52) extending to the lower end of the second vertical grid plate group (3023), the second extension component (52) comprising a third gas generating portion (521) and a fourth gas generating portion (522) arranged opposite to each other, the third gas generating portion (521) and the fourth gas generating portion (522) forming a second channel (523) for gas to pass through, the third gas generating portion (521) and the fourth gas generating portion (522) comprising a third retaining rib (55) and a fourth retaining rib (56) arranged in a "T"-shaped structure, the third retaining rib (55) being located in a third matching groove (324) of the third inclined grid plate group (3021) and the fourth inclined grid plate group (3022), the fourth retaining rib (56) being located between the third inclined grid plate group (3021) and the fourth inclined grid plate group (3022).

7. A circuit breaker with a partition structure according to claim 6, characterized in that: An iron block (7) and a receiving groove (71) for receiving the iron block (7) are arranged in the gas generating hood (5), and a curved surface (72) for avoiding the moving contact (102) is provided below the gas generating hood (5).

8. A circuit breaker with a partition structure according to claim 7, characterized in that: 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).

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