CN116313679A - Circuit breaker - Google Patents

Abstract

The present application provides a circuit breaker, including an arc extinguishing system, a contact system and an exhaust port arranged oppositely, and the arc extinguishing system includes an arc extinguishing component and a breakdown prevention component. The arc extinguishing assembly includes a first arc extinguishing chamber, a second arc extinguishing chamber, and an arc guide. The projections of the first arc extinguishing chamber and the second arc extinguishing chamber on the first plane along the first direction at least partially overlap, and the two Can be electrically connected through the arc guide, the second arc extinguishing chamber is located on the side of the first arc extinguishing chamber away from the contact system, wherein the first direction is parallel to the arrangement direction of the contact system and the exhaust port, and the first plane is perpendicular to first direction. The anti-puncture assembly includes a first insulating member, the first insulating member abuts against the side of the second arc extinguishing chamber away from the first arc extinguishing chamber, and the first insulating member is provided with a plurality of first through holes penetrating itself along the first direction part, the first through part is used to discharge the gas generated in the second arc extinguishing chamber to the exhaust port. The circuit breaker in the embodiment of the present application can improve the arc extinguishing effect.

Description

breaker

technical field

The present application relates to the field of circuit switch devices, in particular to a circuit breaker.

Background technique

A circuit breaker is a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Generally, circuit breakers use an arc extinguishing chamber to extinguish the arc. In the arc extinguishing chamber, metal grids arranged in a stacked manner are used to cut the arc, forcing the long arc to be divided into multiple short arcs to realize arc voltage division and cooling.

A circuit breaker for breaking high-voltage circuits generally includes two arc extinguishing chambers, namely a first arc extinguishing chamber and a second arc extinguishing chamber, the first arc extinguishing chamber is close to the contact system, and the second arc extinguishing chamber is far away from the contact system. When the circuit is broken, the arc in the second arc extinguishing chamber may move to the side away from the first arc extinguishing chamber, thereby causing breakdown and reducing the arc extinguishing effect of the circuit breaker.

Contents of the invention

An embodiment of the present application provides a circuit breaker to improve arc extinguishing effect.

An embodiment of the present application provides a circuit breaker, including an arc extinguishing system, a contact system and an exhaust port arranged oppositely, and the arc extinguishing system includes an arc extinguishing component and a breakdown prevention component. The arc extinguishing assembly includes a first arc extinguishing chamber, a second arc extinguishing chamber, and an arc guide. The projections of the first arc extinguishing chamber and the second arc extinguishing chamber on the first plane along the first direction at least partially overlap, and the two Can be electrically connected through the arc guide, the second arc extinguishing chamber is located on the side of the first arc extinguishing chamber away from the contact system, wherein the first direction is parallel to the arrangement direction of the contact system and the exhaust port, and the first plane is perpendicular to first direction. The anti-puncture assembly includes a first insulating member, the first insulating member abuts against the side of the second arc extinguishing chamber away from the first arc extinguishing chamber, and the first insulating member is provided with a plurality of first through holes penetrating itself along the first direction part, the first through part is used to discharge the gas generated in the second arc extinguishing chamber to the exhaust port.

In some embodiments, the circuit breaker includes a conductive bar, a terminal block, and a transition plate connected between the conductive bar and the terminal block, the conductive bar is opposite to the arc extinguishing assembly in a second direction, and the second direction is parallel to the second arc extinguishing chamber The arrangement direction of the plurality of grid pieces intersects with the first direction, the first insulator includes a first body and a baffle, the first body is provided with a plurality of first through parts, and at least part of the baffle is arranged on the first body away from On one side of the second arc extinguishing chamber, the baffle extends from the connection between the transition plate and the conductive row to the side of the wiring board away from the conductive row, and the plurality of first through parts opposite to the baffle in the first direction are between the baffle A cavity is formed between them, and the cavity communicates with the exhaust port.

In some embodiments, the first body includes an isolation part, a first subsection and a second subsection, the first subsection and the isolation part are arranged along the second direction, and the second subsection is connected to the isolation part and is close to the second arc extinguishing chamber On one side of the baffle, the second subsection is opposite to the baffle in the first direction and exceeds the end of the baffle away from the conductive row along the direction from the conductive row to the second arc extinguishing chamber, and at least part of the isolation part is connected to the baffle and the second The cavity is divided into two sub-cavities facing each other along the third direction, the two sub-cavities communicate with the exhaust port respectively, and the third direction intersects both the first direction and the second direction.

In some embodiments, the end of the baffle facing away from the conductive bar has a first surface facing away from the second arc extinguishing chamber, the first surface, the surface of the first subsection facing away from the second arc extinguishing chamber, and the isolation portion facing away from the second arc extinguishing chamber. The surfaces of the interrupter are in the same plane.

In some embodiments, at least a part of the first through portion is located between two adjacent grid pieces of the second arc extinguishing chamber, the first insulating member includes a first body and a plurality of first gas guiding portions, and the first body is provided with There are a plurality of first through parts, and a plurality of first air guide parts are arranged on the side of the first body facing the second arc extinguishing chamber, and at least part of the first through parts are correspondingly provided on at least one side in the third direction The first gas guide part, and through the first gas guide part, the gas between the two adjacent grids of the second arc extinguishing chamber is introduced into itself, and the third direction intersects the first direction and the multiple grids of the second arc extinguishing chamber The orientation of the slices.

In some embodiments, the first air guiding part is a strip structure and has a first air guiding surface facing away from the first body, and the first air guiding part is from one end far away from the first through part to one end close to the first through part , the distance between the first air guiding surface and the first body gradually decreases.

In some embodiments, the plurality of first through-sections includes a plurality of first through-subsections and a plurality of second through-subsections, and the plurality of first through-subsections and the plurality of second through-subsections The projections of the two planes are arranged at intervals, the second direction is parallel to the arrangement direction of the plurality of grids in the second arc extinguishing chamber, the second plane is perpendicular to the second direction, and the plurality of first through sub-portions are arranged along the third direction in the plurality of first through sub-sections. The projections on the side where the two through sub-parts are located are arranged alternately and at intervals with a plurality of second through sub-parts in the second direction; the first through-sub-parts and the second through-sub-parts are each provided with a first guide on one side of the third direction. In the gas part, the air guiding directions of the first air guiding part corresponding to the first through sub-section and the second through sub-section are opposite.

In some embodiments, the breakdown prevention assembly further includes a second insulating member, the second insulating member abuts against the side of the first arc extinguishing chamber facing the second arc extinguishing chamber, and the second insulating member includes a second body and a second The gas guide part, the second body is provided with a plurality of second through parts, at least part of the second through parts are located between two adjacent grids of the first arc extinguishing chamber and are used to discharge the gas generated by the first arc extinguishing chamber A plurality of second air guiding parts are arranged on the side of the second body facing the first arc extinguishing chamber, and at least part of the second penetrating parts are correspondingly provided with second air guiding parts on at least one side of the fourth direction, and pass through The second gas guide part introduces the gas between two adjacent grids of the first arc extinguishing chamber to itself, and the fourth direction intersects the first direction and the arrangement direction of the grids of the first arc extinguishing chamber.

In some embodiments, the circuit breaker further includes two opposite side plates, the first arc extinguishing chamber and the second arc extinguishing chamber are mounted on the side plates, the second insulating member further includes an end plate disposed on the second body, and the end plate It is arranged at one end of the second body in the stacking direction of the plurality of grids in the first arc extinguishing chamber, and the opposite ends of the end plate along the fourth direction are snapped together with two side plates respectively.

In some embodiments, the first arc extinguishing chamber includes a first end and a second end that are opposite in the stacking direction, the second arc extinguishing chamber includes a third end and a fourth end that are opposite in the stacking direction, and the first arc extinguishing chamber is along The projection of the second arc extinguishing chamber in the first direction covers the fourth end, and the projection of the second arc extinguishing chamber in the first direction in the first arc extinguishing chamber covers the first end. The second insulating part also includes an air guide plate, the air guide The plate is connected to the second body, the air guide plate includes a fifth end stacked with the first end and a sixth end stacked with the fourth end, and the air guide plate guides the first arc extinguisher along the direction from the fifth end to the sixth end The gas in the chamber is exhausted to the exhaust port. The first insulator extends from the third end to the fourth end and has a limiting protrusion facing the sixth end. A limiting groove is formed on the side of the sixth end facing the fourth end. The groove is used for accommodating the position-limiting protrusion and forming a position-limiting position for the position-limiting protrusion in the first direction.

In some embodiments, the arc guide member includes a seventh end stacked with the fourth end, the sixth end of the air guide plate faces a side of the fourth end of the second arc extinguishing chamber to form a slot, and the seventh end of the arc guide member can be connected to Socket mating.

In some embodiments, the circuit breaker further includes two symmetrically arranged first arc gathering pieces and two symmetrically arranged second arc gathering pieces, at least part of the first arc gathering pieces are arranged between the first arc extinguishing chamber and the contacts Between the systems, the first arc gathering member includes second surfaces facing each other, and a first slit is formed between the two second surfaces of the two first arc gathering members, so that the arc moves along the first slit to the first In the arc extinguishing chamber, the side of the first arc collecting member opposite to the second surface in the fourth direction is provided with a first limiting groove that is inserted into at least part of the grid pieces of the first arc extinguishing chamber one by one, and the fourth direction perpendicular to the first direction and the lamination direction of the grids of the first arc extinguishing chamber; at least part of the second arc extinguishing chamber is arranged between the first arc extinguishing chamber and the second arc extinguishing chamber, and the second arc collecting The third surfaces of each other, a second slit is formed between the two third surfaces of the two second arc gathering pieces, so that the arc moves along the second slit to the second arc extinguishing chamber, the second arc gathering piece and The third surface is provided with a second limiting groove on the side opposite to the third direction, which is inserted one by one with at least part of the grid pieces of the second arc extinguishing chamber, and the third direction is perpendicular to the first direction and the second arc extinguishing chamber The stacking direction of multiple grids.

In some embodiments, the fourth direction is parallel to the third direction, the first arc gathering part includes a first arc gathering part and a second arc gathering part, and the first arc gathering part is located between the first arc extinguishing chamber and the contact system , the second arc gathering part is located on one side of the first arc extinguishing chamber in its grid lamination direction, the end of the second arc gathering part facing the second arc extinguishing chamber has a first stepped surface, and the second arc gathering part faces the contact system One end of one end has a second stepped surface, and the first stepped surface and the second stepped surface are abuttingly fitted to form a limit in the third direction between the first arc gathering piece and the second arc gathering piece.

In some embodiments, the contact system includes a static contact, the static contact is arranged opposite to the second arc extinguishing chamber in the first direction, the arc root of the static contact can be transferred to the second arc extinguishing chamber, and the static contact includes The bearing plate, the arc blocking piece and the static contact, the static contact is set on the side of the loading plate facing the arc extinguishing assembly, the arc blocking piece is attached to the side of the loading plate facing the arc extinguishing assembly and arranged around the static contact, the arc blocking piece It is used to prevent the arc root of the static contact from moving away from the second arc extinguishing chamber.

In this application, the arc is blocked by setting the first insulator on the side of the second arc extinguishing chamber away from the first arc extinguishing chamber, so that the arc in the part corresponding to the first insulator in the first direction cannot move to the second extinguishing chamber. The arc extinguishing effect of the second arc extinguishing chamber is improved, that is, the arc extinguishing effect of the circuit breaker is improved.

Description of drawings

The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below by referring to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a partial structure of a circuit breaker according to an embodiment of the present application;

Fig. 3 is a schematic structural view of the anti-breakdown component of the circuit breaker according to the embodiment of the present application;

Fig. 4 is a schematic structural diagram of a first insulating member of a circuit breaker according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a second insulating member of a circuit breaker according to an embodiment of the present application;

Fig. 6 is an exploded view of the second insulator and the side plate of the circuit breaker according to the embodiment of the present application;

Fig. 7 is an assembly view of the second insulator and the side plate shown in Fig. 6;

Fig. 8 is a structural schematic view of the second insulating member shown in Fig. 5 at another angle;

Fig. 9 is a schematic diagram of the partial structure of the second insulator shown in Fig. 8 at another angle;

Fig. 10 is a schematic structural view of the arc guide plate of the circuit breaker according to the embodiment of the present application;

Fig. 11 is a schematic diagram of a partial assembly structure of the second insulator shown in Fig. 9 and the arc guide piece shown in Fig. 10;

Fig. 12 is a schematic diagram of the assembly structure of the first arc gathering part and the second arc gathering part of the circuit breaker according to the embodiment of the present application;

Fig. 13 is a schematic structural view of the first arc gathering member shown in Fig. 12;

Fig. 14 is a schematic structural view of the second arc gathering member shown in Fig. 12;

Fig. 15 is an exploded view of the static contact and the arc guide of the circuit breaker according to the embodiment of the present application;

Figure 16 is a schematic diagram of the assembly of the static contact and the arc guide shown in Figure 15;

Fig. 17 is another exploded view of the static contact and the arc guide piece of the circuit breaker according to the embodiment of the present application;

Fig. 18 is an assembly diagram of the static contact and the arc guide piece shown in Fig. 17;

Fig. 19 is another structural schematic diagram of the first insulator of the circuit breaker according to the embodiment of the present application;

Fig. 20 is another schematic structural view of the anti-breakdown component of the circuit breaker according to the embodiment of the present application;

Fig. 21 is a schematic diagram of another structure of the second insulator of the circuit breaker according to the embodiment of the present application.

Reference signs:

1. Contact system;

11. Static contact; 12. Loading plate; 13. Arc stopper; 131. First subpart; 132. Second subpart; 14. Static contact;

2. Exhaust port;

3. Arc extinguishing system;

4. Arc extinguishing assembly; 41. First arc extinguishing chamber; 411. First end; 412. Second end; 42. Second arc extinguishing chamber; 421. Third end; 422. Fourth end; 43. Arc guiding pieces; 431, the seventh end;

5. Anti-breakdown components;

51. The first insulating part;

511, the first through part; 5111, the first through part; 5112, the second through part; 512, the first body; 5121, the first reinforcement plate; 513, the baffle; 5131, the first surface; Cavity; 5141, sub-cavity; 515, isolation part; 516, first division; 517, second division; 518, first air guide part; 5181, first air guide surface; 519, limit protrusion;

52. The second insulating part;

521, the second body; 5211, the second reinforcement plate; 522, the second air guiding part; 523, the second through part; 524, the end plate; 525, the air guiding plate; 526, the fifth end; 527, the sixth end ; 528, limit groove; 529, slot;

61. Conductive bar; 62. Wiring board; 63. Transition board; 64. Side board; 65. Arc guide piece; 66. Connecting board;

71. First arc gathering part; 711. Second surface; 712. First slit; 713. First limit groove; 714. First arc gathering part; 715. Second arc gathering part; 716. First step 72, the second arc gathering piece; 721, the third surface; 722, the second slit; 723, the second limiting groove; 724, the second step surface;

X, the first direction;

Y, the second direction;

Z. The third direction;

A. The fourth direction.

Detailed ways

The implementation manner of the present application will be further described in detail below with reference to the drawings and embodiments. The detailed description and drawings of the following embodiments are used to illustrate the principles of the application, but not to limit the scope of the application, that is, the application is not limited to the described embodiments.

In the description of this application, it should be noted that, unless otherwise specified, the meaning of "plurality" is more than two; the terms "upper", "lower", "left", "right", "inner", " The orientation or positional relationship indicated by "outside" and so on are only for the convenience of describing the present application 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 a reference to this application. Application Restrictions. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

The orientation words appearing in the following description are the directions shown in the figure, and do not limit the specific structure of the application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected or indirectly connected through an intermediary. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In order to better understand the present application, the following describes the embodiment of the present application with reference to FIG. 1 to FIG. 21 .

FIG. 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application; FIG. 2 is a schematic partial structural diagram of a circuit breaker according to an embodiment of the present application.

Please refer to Figure 1 and Figure 2, the circuit breaker provided by the embodiment of the present application includes an arc extinguishing system 3 and a contact system 1 and an exhaust port 2 arranged oppositely, and the arc extinguishing system 3 includes an arc extinguishing component 4 and an anti-breakdown component 5 . The arc extinguishing assembly 4 includes a first arc extinguishing chamber 41, a second arc extinguishing chamber 42 and an arc guide 43. The projections of the first arc extinguishing chamber 41 and the second arc extinguishing chamber 42 on the first plane along the first direction X are at least Partially overlapping, and the two can be electrically connected through the arc guide 43, the second arc extinguishing chamber 42 is located on the side of the first arc extinguishing chamber 41 away from the contact system 1, wherein the first direction X is parallel to the contact system 1 and the arrangement direction of the exhaust ports 2, the first plane is perpendicular to the first direction X.

The anti-breakdown assembly 5 includes a first insulating member 51, the first insulating member 51 abuts against the side of the second arc extinguishing chamber 42 away from the first arc extinguishing chamber 41, the first insulating member 51 is provided with a plurality of X passes through its own first through portion 511 , and the first through portion 511 is used to discharge the gas generated in the second arc extinguishing chamber 42 to the exhaust port 2 .

In the embodiment of the present application, projections of the first arc extinguishing chamber 41 and the second arc extinguishing chamber 42 along the first direction X on the first plane may completely overlap or partially overlap. Optionally, projections of the first arc extinguishing chamber 41 and the second arc extinguishing chamber 42 on the first plane along the first direction X partially overlap.

In the embodiment of the present application, the first insulating member 51 abuts against a side of the second arc extinguishing chamber 42 close to the exhaust port 2 . Exemplarily, the first insulating member 51 may abut against the entire side of the second arc extinguishing chamber 42 facing the exhaust port 2 , or may abut against a part of the second arc extinguishing chamber 42 facing the exhaust port 2 .

The embodiment of the present application does not limit the specific structure of the first through portion 511 . Exemplarily, the first through portion 511 is a through hole or a groove.

The first insulating member 51 in the embodiment of the present application is made of insulating material.

When the second arc extinguishing chamber 42 is extinguishing the arc, the arc may move to the side of the second arc extinguishing chamber 42 away from the first arc extinguishing chamber 41 to cause a breakdown phenomenon, so that at least part of the grids of the second arc extinguishing chamber 42 Can not play the role of arc extinguishing, affecting the effect of arc extinguishing. In this application, the arc is blocked by setting the first insulating member 51 on the side of the second arc extinguishing chamber 42 away from the first arc extinguishing chamber 41, so that the arc in the part corresponding to the first insulating member 51 in the first direction X cannot Move to the outside of the second arc extinguishing chamber 42, thereby improving the arc extinguishing effect of the second arc extinguishing chamber 42, that is, improving the arc extinguishing effect of the circuit breaker.

In some embodiments, the first insulating member 51 extends from one end of the second arc extinguishing chamber 42 in the stacking direction to the other end in the stacking direction.

Optionally, the size of the first insulating member 51 along the third direction Z is greater than or equal to the size of the corresponding part of the second arc extinguishing chamber 42 along the third direction Z. Wherein, the third direction Z intersects the first direction X and the arrangement direction of the grids of the second arc extinguishing chamber 42 .

Optionally, a first through portion 511 is correspondingly provided between any two grid pieces of the second arc extinguishing chamber 42 .

In some embodiments, the circuit breaker includes a conductive bar 61, a terminal block 62, and a transition plate 63 connected between the conductive bar 61 and the terminal block 62. The conductive bar 61 is opposite to the arc extinguishing assembly 4 in the second direction Y, and the second The direction Y is parallel to the arrangement direction of the grids of the second arc extinguishing chamber 42 and intersects the first direction X. The first insulating member 51 includes a first body 512 and a baffle 513. The first body 512 is provided with a plurality of first A through portion 511, at least part of the baffle 513 is disposed on the side of the first body 512 away from the second arc extinguishing chamber 42, the baffle 513 extends from the connection between the transition plate 63 and the conductive bar 61 to the terminal plate 62 away from the conductive bar 61 , a cavity 514 is formed between the plurality of first through portions 511 facing the baffle 513 in the first direction X and the baffle 513 , and the cavity 514 communicates with the exhaust port 2 .

The embodiment of the present application does not limit the included angle between the transition board 63 and the conductive bar 61 and the wiring board 62 . Exemplarily, the transition board 63 is connected to the conductive bar 61 and the wiring board 62 at an obtuse angle.

The baffle plate 513 in the embodiment of the present application extends from the connection between the transition plate 63 and the conductive row 61 to the connection between the transition plate 63 and the terminal block 62, which means that the baffle plate 513 has two opposite ends, one of which is located on the transition plate 63 and the connection of the conductive row 61, the other end is located on the side of the wiring board 62 away from the conductive row 61. Wherein, the side of the wiring board 62 away from the conductive row 61 is the upper side of the wiring board 62 in FIG. 2 .

The high-temperature gas generated by the arc after being cut by the second arc extinguishing chamber 42 will be directly discharged to the transition plate 63 and the terminal plate 62, thereby causing the terminal plate 62 to fuse with the bolts arranged on it, causing damage to the terminal plate 62, thereby affecting use. In this application, a baffle 513 is provided on the side of the first body 512 away from the second arc extinguishing chamber 42, and the baffle 513 extends from the connection between the transition plate 63 and the conductive bar 61 to the side of the wiring board 62 away from the conductive bar 61, so Firstly, the baffle plate 513 forms a blocking effect on the high-temperature gas, preventing at least part of the high-temperature gas from being directly discharged to the transition plate 63 and the terminal plate 62, improving the welding problem between the terminal plate 62 and the bolts, and prolonging the service life of the terminal plate 62.

Fig. 3 is a schematic structural diagram of a breakdown prevention assembly of a circuit breaker according to an embodiment of the present application.

Referring to FIG. 3 , in some embodiments, the first body 512 includes a partition 515 , a first subsection 516 and a second subsection 517 , the first subsection 516 and the partition 515 are arranged along the second direction Y, and the second The subsection 517 is connected to the side of the isolation part 515 close to the second arc extinguishing chamber 42. The second subsection 517 is opposite to the baffle 513 in the first direction X and exceeds the baffle along the direction from the conductive row 61 to the second arc extinguishing chamber 42. The plate 513 is away from the end of the conductive row 61, and at least part of the isolation part 515 is connected between the baffle plate 513 and the second subsection 517 and divides the cavity 514 into two sub-cavities 5141 opposite to each other along the third direction Z. The sub-cavities 5141 communicate with the exhaust ports 2 respectively, and the third direction Z intersects both the first direction X and the second direction Y.

The above-mentioned cavity is formed between the second subsection 517 and the baffle plate 513 in the embodiment of the present application.

Optionally, the third direction Z is perpendicular to the first direction X and the second direction Y.

The embodiment of the present application does not limit the shape of the isolation part 515 . Exemplarily, the isolation part 515 is a plate-like member. Further optionally, the isolation portion 515 is arranged perpendicular to the third direction Z.

Optionally, the isolation part 515 extends from an end of the second subsection 517 away from the first subsection 516 to an end of the second subsection 517 close to the first subsection 516, so that the part of the second subsection 517 beyond the baffle plate 513 The opposite area is also divided into two parts, and the two parts communicate with the two sub-cavities 5141 respectively.

Optionally, the first subsection 516, the second subsection 517 and the isolation part 515 are all directly connected. Further, the isolation part 515 , the first subsection 516 , the second subsection 517 and the baffle 513 are integrally formed.

In the embodiment of the present application, the second subsection 517 exceeds the end of the baffle plate 513 away from the conductive bar 61 along the direction from the conductive bar 61 to the second arc extinguishing chamber 42, so that the part of the second subsection 517 beyond the baffle plate 513 is along the first The area corresponding to the direction X can communicate with the two sub-cavities 5141, and the two sub-cavities 5141 communicate with the exhaust port 2 through this part of the area, so that the high-temperature gas can be discharged smoothly.

The isolation part 515 is provided to be connected between the baffle plate 513 and the second subsection 517, and the cavity 514 is divided into two sub-cavities 5141. In this way, not only the structural strength of the first insulating member 51 is increased, Moreover, the high-temperature gas is separated to reduce the possibility of re-arcing of the high-temperature gas.

In some embodiments, the end of the baffle plate 513 facing away from the conductive bar 61 has a first surface 5131 facing away from the second arc extinguishing chamber 42 , and the first surface 5131 and the first subsection 516 are facing away from the second arc extinguishing chamber 42 The surface and the surface of the isolation portion 515 facing away from the second arc extinguishing chamber 42 are located on the same plane.

Such an arrangement can make the side of the first insulating member 51 facing the exhaust port 2 flat, so that other structures can be conveniently arranged and the interference between the first insulating member 51 and other components can be reduced.

Fig. 4 is a schematic structural view of the first insulating member of the circuit breaker according to the embodiment of the present application.

Referring to FIG. 4 , in some embodiments, at least part of the first through portion 511 is located between two adjacent grids of the second arc extinguishing chamber 42 , and the first insulator 51 includes a first body 512 and a plurality of second grids. An air guide part 518, the first body 512 is provided with a plurality of first through parts 511, and the plurality of first air guide parts 518 are arranged on the side of the first body 512 facing the second arc extinguishing chamber 42, at least part of the number of the first through parts 511 At least one side of the through portion 511 in the third direction Z is correspondingly provided with a first gas guiding portion 518 , and the gas between two adjacent grids of the second arc extinguishing chamber 42 is diverted through the first gas guiding portion 518 . Introducing itself, the third direction Z intersects the first direction X and the arrangement direction of the plurality of grids in the second arc extinguishing chamber 42 .

At least part of the first penetrating portion 511 is located between two adjacent grids of the second arc extinguishing chamber 42 , which does not mean that at least a portion of the first penetrating portion 511 is provided between any two adjacent grids of the second arc extinguishing chamber 42 . the first through portion 511 .

The embodiment of the present application does not limit the shape of the first air guiding part 518 . Exemplarily, the first air guiding part 518 may be an integral strip structure, or may be a plurality of block structures arranged at intervals.

The first air guiding portion 518 in the embodiment of the present application may be disposed on one side of the first through portion 511 in the third direction Z, or may be disposed on opposite sides of the first through portion 511 in the third direction Z.

Optionally, the third direction Z is perpendicular to the arrangement direction of the grids in the second arc extinguishing chamber 42 . Further optionally, the first direction X, the direction in which the grids of the second arc extinguishing chamber 42 are arranged, and the third direction Z are perpendicular to each other.

The first air guide part 518 is provided on the first body 512, so as to guide the high-temperature gas generated by arc extinguishing between two adjacent grids to the first through part 511, so that the high-temperature gas can flow smoothly to the exhaust port 2 Movement, improve exhaust efficiency, and reduce the risk of explosion due to poor flow of high-temperature gas.

In some embodiments, the first air guiding part 518 is a strip structure and has a first air guiding surface 5181 facing away from the first body 512. At one end of the through portion 511 , the distance between the first air guide surface 5181 and the first body 512 becomes gradually smaller.

The embodiment of the present application does not limit the shape of the first air guide surface 5181 . Exemplarily, the first air guide surface 5181 may be a plane, a curved surface, or an irregularly shaped surface that combines a plane and a curved surface.

The first air guiding part 518 is arranged as a whole strip structure, which is convenient for processing and manufacturing.

In some embodiments, the multiple first through-sections 511 include multiple first through-subsections 5111 and multiple second through-subsections 5112, and the multiple first through-subsections 5111 and multiple second through-subsections 5112 are along the The projection of the second direction Y on the second plane is set at intervals, the second direction Y is parallel to the arrangement direction of the plurality of grids of the second arc extinguishing chamber 42, the second plane is perpendicular to the second direction Y, and the plurality of first through-holes Projections of the portion 5111 along the third direction Z on the side where the plurality of second through sub-portions 5112 are located are alternately and spaced apart from the plurality of second through sub-portions 5112 in the second direction Y.

Optionally, the third direction Z, the first direction X and the second direction Y are perpendicular to each other.

The first penetrating sub-section 5111 and the second penetrating sub-section 5112 are arranged at intervals along the projection of the second plane along the second direction Y, and the multiple first penetrating sub-sections 5111 are arranged along the third direction Z in the plurality of second penetrating sub-sections The projection on the side where 5112 is located and the plurality of second penetrating sub-sections 5112 are arranged alternately and at intervals in the second direction Y. In this way, the interval between two adjacent first penetrating sub-sections 5111 is relatively large, and the adjacent two second penetrating sub-sections 5111 The penetrating sub-parts 5112 also have relatively large intervals, which can not only significantly increase the structural strength of the first insulating member 51, but also greatly reduce the possibility of high-temperature gas re-arcing on the side of the first insulating member 51 away from the second arc extinguishing chamber 42, The arc extinguishing effect of the second arc extinguishing chamber 42 is improved.

In some embodiments, the first through subsection 5111 and the second through subsection 5112 are each provided with a first air guiding part 518 on one side of the third direction Z, and the first through subsection 5111 and the second through subsection The air guide direction of the first air guide part 518 corresponding to 5112 is opposite.

In this embodiment, the first through sub-portion 5111 is provided with a first air guiding part 518 on the side close to the second penetrating sub-portion 5112, and the second penetrating sub-portion 5112 is provided with a The first air guiding part 518 .

In this embodiment, the air guiding directions of the first air guiding part 518 and the second air guiding part 522 are both along the third direction Z.

The first through sub-section 5111 and the first air guide part 518 corresponding to the second through sub-section 5112 are set so that the direction of air conduction is opposite, so that the adjacent first through sub-section 5111 or the adjacent second through sub-section can be The high temperature gas generated due to arc extinguishing between 5112 is directed to the corresponding first through portion 511 along the first gas guide portion 518 to reduce the accumulation of high temperature gas.

Fig. 5 is a schematic structural diagram of the second insulating member of the circuit breaker according to the embodiment of the present application.

Please refer to FIG. 5 , in some embodiments, the anti-breakdown assembly 5 further includes a second insulating member 52, and the second insulating member 52 abuts against the side of the first arc extinguishing chamber 41 facing the second arc extinguishing chamber 42, the second insulating member 52 The second insulator 52 includes a second body 521 and a second air guiding portion 522. The second body 521 is provided with a plurality of second through portions 523. At least part of the second through portions 523 are located on two adjacent sides of the first arc extinguishing chamber 41 A plurality of second gas guiding parts 522 are arranged on the side of the second body 521 facing the first arc extinguishing chamber 41, and at least part of the second The penetrating part 523 is provided with a second gas guide part 522 on at least one side of the fourth direction A, and the gas between the two adjacent grids of the first arc extinguishing chamber 41 is introduced into itself through the second gas guide part 522 , the fourth direction A intersects the first direction X and the arrangement direction of the grids in the first arc extinguishing chamber 41 .

Exemplarily, the second insulating member 52 may abut against the entire side of the first arc extinguishing chamber 41 facing the second arc extinguishing chamber 42 , or may abut against the side of the first arc extinguishing chamber 41 facing the second arc extinguishing chamber 42 part.

The second insulating member 52 in the embodiment of the present application is made of insulating material.

At least part of the second penetrating portion 523 is located between two adjacent grids of the first arc extinguishing chamber 41, which does not mean that at least a portion of the second penetrating portion 523 is provided between any two adjacent grids of the first arc extinguishing chamber 41. The second through portion 523 .

The embodiment of the present application does not limit the specific structure of the second through portion 523 . Exemplarily, the second through portion 523 is a through hole or a groove.

The embodiment of the present application does not limit the shape of the second air guiding part 522 . Exemplarily, the second air guiding part 522 may be an integral strip structure, or may be a plurality of block structures arranged at intervals.

The second air guiding portion 522 in the embodiment of the present application may be disposed on one side of the second through portion 523 in the fourth direction A, or may be disposed on opposite sides of the second through portion 523 in the fourth direction A.

Optionally, the fourth direction A is perpendicular to the arrangement direction of the grids in the first arc extinguishing chamber 41 . Further optionally, the first direction X, the direction in which the grids of the first arc extinguishing chamber 41 are arranged, and the fourth direction A are perpendicular to each other.

Optionally, the fourth direction A is parallel to the third direction Z.

The second gas guide part 522 is provided on the second body 521, so as to guide the high-temperature gas generated by arc extinguishing between two adjacent grids in the first arc extinguishing chamber 41 into the second through part 523, so that the high temperature The gas moves smoothly to the exhaust port 2, which improves the exhaust efficiency and reduces the risk of explosion caused by the poor flow of high-temperature gas.

Fig. 6 is an exploded view of the second insulator and the side plate of the circuit breaker according to the embodiment of the present application, and Fig. 7 is an assembly view of the second insulator and the side plate shown in Fig. 6 .

Referring to FIGS. 6 and 7 , in some embodiments, the circuit breaker further includes two opposite side plates 64 , the first arc extinguishing chamber 41 and the second arc extinguishing chamber 42 are installed on the side plates 64 , and the second insulating member 52 It also includes an end plate 524 disposed on the second body 521. The end plate 524 is disposed on one end of the second body 521 in the stacking direction of multiple grids in the first arc extinguishing chamber 41, and the opposite ends of the end plate 524 along the fourth direction A They are snapped together with the two side plates 64 respectively.

The end plate 524 of the embodiment of the present application is disposed at the end of the second body 521 away from the static contact of the contact system 1 , that is, at the upper end in FIG. 2 .

In the embodiment of the present application, there is no limitation on the clamping manner of the end plate 524 and the side plate 64 . Exemplarily, both sides of the end plate 524 are provided with protrusions, and the side plate 64 is provided with a groove, and the protrusions can be engaged in the groove to realize the position limitation between the end plate 524 and the side plate 64 in the first direction X. Optionally, the protrusion is provided with a guide slope, and the guide slope is used to abut against the side plate 64 so that the end plate 524 can move to the slot. In another example, protrusions are provided on both sides of the end plate 524, and the side plate 64 is provided with a through hole. bit. In another example, grooves are provided on both sides of the end plate 524, and protrusions are provided on the side plate 64, and the protrusions can be engaged in the grooves to realize the restriction between the end plate 524 and the side plate 64 in the first direction X. bit.

The end plate 524 is clipped to the side plate 64, that is, the second insulator 52 is clipped to the side plate 64, so as to realize the installation and fixation of the second insulator 52 and increase the structural strength of the circuit breaker.

FIG. 8 is a schematic structural view of the second insulating member shown in FIG. 5 at another angle.

Referring to FIG. 1, FIG. 3, FIG. 5 and FIG. 8, in some embodiments, the first arc extinguishing chamber 41 includes a first end 411 and a second end 412 opposite in the stacking direction, and the second arc extinguishing chamber 42 is included in The third end 421 and the fourth end 422 opposite to the stacking direction, the projection of the first arc extinguishing chamber 41 along the first direction X to the second arc extinguishing chamber 42 covers the fourth end 422, and the second arc extinguishing chamber 42 is along the first direction The projection of X on the first arc extinguishing chamber 41 covers the first end 411 .

The second insulator 52 also includes an air guide plate 525 connected to the second body 521 , and the air guide plate 525 includes a fifth end 526 stacked with the first end 411 and a fifth end 526 stacked with the fourth end 422 . At the six ends 527 , the gas guide plate 525 guides the gas in the first arc extinguishing chamber 41 to the exhaust port 2 along the direction from the fifth end 526 to the sixth end 527 . The first insulator 51 extends from the third end 421 to the fourth end 422 and has a limiting protrusion 519 facing the sixth end 527. A limiting groove 528 is formed on the side of the sixth end 527 facing the fourth end 422. The positioning groove 528 is used for accommodating the limiting protrusion 519 and forming a limiting position in the first direction X for the limiting protrusion 519 .

The gas guide plate 525 in this embodiment roughly forms a Z-shaped structure, and the middle part of the Z-shaped structure is used to guide the gas in the first arc extinguishing chamber 41 to be exhausted to the exhaust port 2 .

During the actual use of the circuit breaker, the first insulating member 51 is located above the second insulating member 52. In order to reduce the risk of the second insulating member 52 falling due to gravity, the first insulating member 51 and the second insulating member 52 are placed The limit in the first direction X is realized by the limit protrusion 519 and the limit groove 528, thereby increasing the durability of the circuit breaker.

In some other embodiments, the first insulator 51 extends from the third end 421 to the fourth end 422 and has a limiting protrusion 519 facing the sixth end 527, and the sixth end 527 is formed on a side facing the fourth end 422. The limiting protrusion is used to abut against the side of the limiting protrusion 519 facing the second arc extinguishing chamber 42 and form a support for the limiting protrusion 519 in the first direction X.

In this embodiment, there is no limitation on the shape of the position-limiting protrusion, which may be, for example, a block shape or a strip shape.

Fig. 9 is a schematic diagram of the partial structure of the second insulator shown in Fig. 8 at another angle. A schematic diagram of the partial assembly structure of the insulator and the arc guide shown in FIG. 10 .

Referring to FIGS. 9-11 , in some embodiments, the arc guide member 43 includes a seventh end 431 stacked with the fourth end 422 , and the sixth end 527 of the air guide plate 525 is formed on a side facing the fourth end 422 The slot 529 , the seventh end 431 of the arc guide member 43 can be inserted into the slot 529 .

Optionally, the arc guide member 43 includes an end portion stacked with the first end 411 of the first arc extinguishing chamber 41 and a seventh end 431 stacked with the fourth end 422, so that the first arc extinguishing chamber and the second arc extinguishing chamber The arc chamber is electrically connected.

Optionally, the arc guide member 43 is arranged in close contact with the air guide plate 525 .

The arc guiding member 43 in the embodiment of the present application is made of conductive material.

The opening of the slot 529 in the embodiment of the present application faces the first arc extinguishing chamber 41 .

During the arc extinguishing process, the temperature of the arc guide 43 will gradually increase, and then thermal deformation will occur. This deformation may be manifested as an upward bending of the arc guide 43, or a downward bending of the arc guide 43, so the guide The air plate 525 is plugged with the end of the arc guide 43 to reduce the severity of bending deformation of the arc guide 43 .

Figure 12 is a schematic diagram of the assembly structure of the first arc gathering part and the second arc gathering part of the circuit breaker according to the embodiment of the present application; Figure 13 is a schematic structural diagram of the first arc gathering part shown in Figure 12; Schematic diagram of the structure of the second arc gathering part shown.

Referring to Fig. 12-Fig. 14, in some embodiments, the circuit breaker further includes two symmetrically arranged first arc gathering pieces 71 and symmetrically arranged two second arc gathering pieces 72, at least Partially disposed between the first arc extinguishing chamber 41 and the contact system 1 , the first arc gathering member 71 includes second surfaces 711 facing each other, and the two second surfaces 711 of the two first arc gathering members 71 form a The first slit 712, so that the arc moves to the first arc extinguishing chamber 41 along the first slit 712, and the side of the first arc gathering member 71 opposite to the second surface 711 in the fourth direction A is provided with a At least some grids of an arc extinguishing chamber 41 are plugged into the first limiting groove 713 one by one, and the fourth direction A is perpendicular to the first direction X and the stacking direction of the grids of the first arc extinguishing chamber 41 .

At least part of the second arc gathering member 72 is disposed between the first arc extinguishing chamber 41 and the second arc extinguishing chamber 42 , the second arc gathering member 72 includes a third surface 721 facing each other, and the two second arc gathering members 72 A second slit 722 is formed between the two third surfaces 721 of the second slit 721, so that the arc moves to the second arc extinguishing chamber 42 along the second slit 722. The side opposite to Z is provided with a second limiting groove 723 that is plugged with at least part of the grid pieces of the second arc extinguishing chamber 42 one by one, and the third direction Z is perpendicular to the first direction X and the second arc extinguishing chamber 42 more than The lamination direction of each grid.

The first arc gathering member 71 and the second arc gathering member 72 in the embodiment of the present application are made of insulating materials.

The third direction Z and the fourth direction A in the embodiment of the present application may be parallel to each other, or not.

The embodiment of the present application does not limit the shape of the second surface 711 . Exemplarily, the second surface 711 may be a plane, a curved surface or other irregularly shaped surfaces. The same is true for the third surface 721 , which will not be repeated in this application.

Optionally, the size of the second arc gathering member 72 along the second direction Y is the same as the size of the second arc extinguishing chamber 42 along the second direction Y.

The first arc gathering piece 71 and the second arc gathering piece 72 are arranged, and through the arc gathering function of the first arc gathering piece 71 and the second arc gathering piece 72, the arc can be as far as possible along the first narrow slit 712 and the second narrow slot. The slit 722 enters the first arc extinguishing chamber 41 and the second arc extinguishing chamber 42, thereby improving the arc extinguishing capability of the arc extinguishing system 3 . Moreover, the first arc gathering part 71 and the second arc gathering part 72 are respectively provided with a plurality of first limiting grooves 713 and a plurality of second limiting grooves 723, and the plurality of first limiting grooves 713 can form a The grid of the chamber 41 is limited in its own stacking direction and the fourth direction A, and a plurality of second limiting grooves 723 can form a position for the grid of the second arc extinguishing chamber 42 in its own stacking direction and the third direction Z. Limiting, reducing the swaying range of the first arc extinguishing chamber 41 and the second arc extinguishing chamber 42, but also enabling the arc to enter the main part of the grid with a larger area and be cut by the main part of the grid, thereby improving arc extinguishing Effect.

In some embodiments, the fourth direction A is parallel to the third direction Z, the first arc gathering part 71 includes a first arc gathering part 714 and a second arc gathering part 715, and the first arc gathering part 714 is located in the first arc extinguishing chamber 41 and the contact system 1, the second arc gathering part 715 is located on one side of the first arc extinguishing chamber 41 in the lamination direction of its own grids, and the end of the second arc gathering part 715 facing the second arc extinguishing chamber 42 has a first The step surface 716, the second arc gathering part 72 has a second step surface 724 at the end facing the contact system 1, the first step surface 716 and the second step surface 724 abut and fit together to form the first arc gathering part 71 and the second arc gathering part 71. The limit of the arc gathering member 72 in the third direction Z.

Optionally, the first arc gathering portion 714 and the second arc gathering portion 715 are integrally provided.

In the embodiment of the present application, the first stepped surface 716 and the second stepped surface 724 abut against each other, that is, the first stepped surface 716 and the second stepped surface 724 match and fit.

Optionally, the stacking direction of the grids of the first arc extinguishing chamber 41 is parallel to the stacking direction of the grids of the second arc extinguishing chamber 42 . Further optionally, the length directions of the first stepped surface 716 and the second stepped surface 724 are parallel to the stacking direction of the grids of the first arc extinguishing chamber 41 .

The first arc gathering piece 71 and the second arc gathering piece 72 are limited in the third direction Z by using the first stepped surface 716 and the second stepped surface 724, because the first arc gathering piece 71 and the second arc gathering piece 72 respectively has a limiting effect on the first arc extinguishing chamber 41 and the second arc extinguishing chamber 42, so the mutually limited first arc gathering member 71 and the second arc gathering member 72 can limit the first arc extinguishing chamber 41 and the second arc gathering member 72 The shaking of the second arc extinguishing chamber 42 improves the reliability of the first arc extinguishing chamber 41 and the second arc extinguishing chamber 42 .

Figure 15 is an exploded view of the static contact and the arc guide of the circuit breaker of the embodiment of the application, Figure 16 is a schematic diagram of the assembly of the static contact and the arc guide shown in Figure 15, and Figure 17 is the implementation of the application Another exploded view of the static contact and the arc guide of the circuit breaker of the example, Fig. 18 is an assembly diagram of the static contact and the arc guide shown in Fig. 17 .

Please refer to Fig. 15 and Fig. 16, in some embodiments, the contact system 1 includes a static contact 11, the static contact 11 is arranged opposite to the second arc extinguishing chamber 42 in the first direction X, and the arc root of the static contact 11 It can be transferred to the second arc extinguishing chamber 42. The static contact 11 includes a carrier plate 12, an arc blocking member 13 and a static contact 14. The static contact 14 is arranged on the side of the carrier plate 12 facing the arc extinguishing assembly 4. The arc blocking member 13 is attached to the side of the carrier plate 12 facing the arc extinguishing assembly 4 and arranged around the static contact 14 , the arc stopper 13 is used to prevent the arc root of the static contact 11 from moving away from the second arc extinguishing chamber 42 .

The carrying board 12 in the embodiment of the present application is connected to the conductive row 61 . Optionally, the carrying board 12 is integrated with the conductive row 61 .

The arc blocking member 13 in the embodiment of the present application is made of insulating material. Optionally, the arc blocking member 13 is made of insulating paper or plastic sheet.

In the embodiment of the present application, the static contact 14 protrudes from the carrier board 12 . Optionally, the static contact 14 is a block structure. Further optionally, the static contact 14 is a cuboid block structure.

The arc blocking member 13 in the embodiment of the present application is disposed around the static contact 14 , but not disposed on the side of the static contact 14 facing the second arc extinguishing chamber 42 .

Optionally, the circuit breaker further includes a connecting plate 66 connected between the conductive bar 61 and the carrying plate 12 , and two ends of the connecting plate 66 are respectively connected to the conductive bar 61 and the carrying plate 12 at an angle. Further optionally, the conductive bar 61 , the connecting plate 66 and the carrying plate 12 are integrated.

Optionally, the arc blocking member 13 includes a first subsection 131 attached to the bearing plate 12 and a second subsection 132 attached to the connection plate 66 , and the second subsection 132 is screwed to the connection plate 66 . Further optionally, the first sub-part 131 is bonded to the bearing plate 12 . Further optionally, the second sub-part 132 is glued to the connecting plate 66 .

Optionally, the circuit breaker also includes an arc guide 65, which is arranged on the side of the conductive bar 61 facing the arc extinguishing assembly 4 and is electrically connected to the static contact 11. The arc guide 65 is connected to the second arc extinguishing chamber 42 The third end 421 of the third end 421 is stacked to transfer the arc on the static contact 11 to the second arc extinguishing chamber 42 .

Further optionally, the arc guide piece 65 , the connecting plate 66 and the arc stopper 13 are screwed together.

Referring to Fig. 17 and Fig. 18, optionally, the arc blocking member 13 includes a first sub-section 131, a second sub-section 132, two third sub-sections 133 and a fourth sub-section attached to the carrier plate 12, the first The first sub-section 131 and the fourth sub-section are arranged opposite to each other along the second direction Y, the second sub-section 132 is connected to the first sub-section 131 by bending, and the two third sub-sections 133 are respectively connected to the first sub-section 131 along the third The two ends of the direction Z are opposite to each other. The first sub-section 131 , the second sub-section 132 , the two third sub-sections 133 , and the fourth sub-section surround and form an accommodating cavity for covering the carrier board 12 , the connection board 66 and part of the conductive bars 61 .

When connecting, the arc guide piece 65 and the connecting plate 66 can be assembled together with screws first, and then the arc stopper 13 can be put on. The arc blocking member 13 is set as a cover structure so that the screws are not exposed, thereby increasing the electrical creepage distance and improving the safety of the circuit breaker.

An arc stopper 13 is arranged on the carrier plate 12 to prevent the arc root of the static contact 11 from moving away from the second arc extinguishing chamber 42, reduce the risk of the arc root burning near the static contact 11, and enhance the arc extinguishing of the circuit breaker Effect.

Fig. 19 is another schematic structural view of the first insulator of the circuit breaker according to the embodiment of the present application; Fig. 20 is another schematic structural view of the anti-breakdown component of the circuit breaker according to the embodiment of the present application.

Please refer to FIG. 19 and FIG. 20. In some embodiments, the first body 512 includes a plurality of first reinforcement plates 5121 arranged in sequence along the third direction Z, and two adjacent first reinforcement plates 5121 are arranged along the third direction Z. Relatively disposed, at least part of the first through portion 511 is disposed between two adjacent first reinforcing plates 5121 .

Further optionally, the number of the first reinforcing plates 5121 is three, and the three first reinforcing plates 5121 form two accommodation spaces, a plurality of first through sub-parts 5111 are arranged in one of the accommodation spaces, and the second through-sub-parts 5112 Set in another storage space.

A plurality of first reinforcing plates 5121 are disposed on the first body 512 to increase the structural strength of the first body 512 and reduce the possibility of breaking the first body 512 due to the arrangement of the plurality of first through portions 511 .

Fig. 21 is a schematic diagram of another structure of the second insulator of the circuit breaker according to the embodiment of the present application.

Please refer to FIG. 21 , in some embodiments, the second body 521 includes a plurality of second reinforcing plates 5211 arranged in sequence along the fourth direction A, and two adjacent second reinforcing plates 5211 are arranged opposite to each other along the fourth direction A, At least part of the plurality of second through portions 523 is disposed between two adjacent second reinforcing plates 5211 .

A plurality of second reinforcement plates 5211 are disposed on the second body 521 to increase the structural strength of the second body 521 and reduce the possibility of breaking the second body 521 due to the arrangement of the plurality of second through portions 523 .

While the present application has been described with reference to a preferred embodiment, various modifications may be made thereto and equivalents may be substituted for parts thereof without departing from the scope of the present application, in particular, as long as there are no structural conflicts , the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (14)

1. A circuit breaker, comprising a relatively arranged contact system and an exhaust port, characterized in that it also includes an arc extinguishing system, and the arc extinguishing system includes: The arc extinguishing assembly includes a first arc extinguishing chamber, a second arc extinguishing chamber, and an arc guiding member. The projections of the first arc extinguishing chamber and the second arc extinguishing chamber on the first plane along the first direction at least partially overlap each other. and the two can be electrically connected through the arc guide, the second arc extinguishing chamber is located on the side of the first arc extinguishing chamber away from the contact system, wherein the first direction is parallel to the The arrangement direction of the contact system and the exhaust port, the first plane is perpendicular to the first direction; The anti-breakdown assembly includes a first insulating member, the first insulating member abuts against the side of the second arc extinguishing chamber away from the first arc extinguishing chamber, and the first insulating member is provided with a plurality of The first direction passes through its own first penetration portion, and the first penetration portion is used to discharge the gas generated in the second arc extinguishing chamber to the exhaust port. 2. The circuit breaker according to claim 1, characterized in that it comprises a conductive bar, a terminal block, and a transition plate connected between the conductive bar and the terminal block, the conductive bar and the arc extinguishing assembly are in the second The two directions are opposite to each other, the second direction is parallel to the arrangement direction of the grids of the second arc extinguishing chamber and intersects the first direction, The first insulator includes a first body and a baffle, the first body is provided with a plurality of the first through parts, at least part of the baffle is disposed on the first body away from the second On one side of the arc chamber, the baffle extends from the connection between the transition plate and the conductive row to the side of the wiring board away from the conductive row, and is opposite to the baffle in the first direction A cavity is formed between the plurality of first through portions and the baffle, and the cavity communicates with the exhaust port. 3. The circuit breaker according to claim 2, wherein the first body comprises a partition, a first subsection and a second subsection, and the first subsection and the partition are along the first subsection. arranged in two directions, the second subsection is connected to the side of the isolation part close to the second arc extinguishing chamber, The second subsection is opposite to the baffle in the first direction and exceeds the end of the baffle away from the conductive row along the direction from the conductive row to the second arc extinguishing chamber, the isolation part at least a part of which is connected between the baffle plate and the second subsection and divides the cavity into two sub-cavities facing each other along the third direction, and the two sub-cavities are respectively connected to the exhaust The ports communicate with each other, and the third direction intersects both the first direction and the second direction. 4. The circuit breaker according to claim 2, characterized in that, the end of the baffle away from the conductive bar has a first surface opposite to the second arc extinguishing chamber, the first surface, A surface of the first subsection facing away from the second arc extinguishing chamber and a surface of the isolation portion facing away from the second arc extinguishing chamber are located on the same plane. 5. The circuit breaker of claim 1, wherein: At least part of the first through portion is located between two adjacent grids of the second arc extinguishing chamber, The first insulator includes a first body and a plurality of first air guiding parts, the first body is provided with a plurality of the first through parts, and the plurality of first air guiding parts are arranged on the first The side of the main body facing the second arc extinguishing chamber, at least one side of at least a part of the first penetrating parts in the third direction is provided with the first air guiding part correspondingly, and passes through the first guiding part. The gas part introduces the gas between two adjacent grids of the second arc extinguishing chamber into itself, and the third direction intersects the first direction and the arrangement of multiple grids of the second arc extinguishing chamber direction. 6 . The circuit breaker according to claim 5 , wherein the first air guiding part is a bar-shaped structure and has a first air guiding surface facing away from the first body, and the first air guiding part From one end away from the first through portion to an end close to the first through portion, the distance between the first air guide surface and the first body gradually decreases. 7. The circuit breaker according to claim 5, characterized in that, the plurality of first through-sections comprises a plurality of first through-subsections and a plurality of second through-subsections, and the plurality of first through-subsections and the plurality of second penetrating sub-portions are arranged at intervals along the projection of the second plane in the second direction, the second direction is parallel to the arrangement direction of the grids of the second arc extinguishing chamber, and the second the plane is perpendicular to the second direction, The projections of the plurality of first through sub-sections along the third direction on the side where the plurality of second through sub-sections are located are alternately and spaced apart from the plurality of second through sub-sections in the second direction; The first through sub-portion and the second penetrating sub-portion are each provided with one first air guiding part on one side of the third direction, and the first through-through sub-portion and the second penetrating sub-portion correspond to each other. The air guide direction of the first air guide part is opposite. 8. The circuit breaker according to claim 1, wherein the breakdown prevention assembly further comprises a second insulator, The second insulating member abuts against the side of the first arc extinguishing chamber facing the second arc extinguishing chamber, the second insulating member includes a second body and a second air guiding part, and the second body A plurality of second through parts are provided, at least part of the second through parts are located between two adjacent grids of the first arc extinguishing chamber and are used to discharge the gas generated in the first arc extinguishing chamber, A plurality of the second air guiding parts are arranged on the side of the second body facing the first arc extinguishing chamber, and at least a part of the second penetrating parts are correspondingly provided on at least one side of the fourth direction. The second gas guide part, and through the second gas guide part, the gas between the two adjacent grids of the first arc extinguishing chamber is introduced into itself, and the fourth direction intersects the first direction And the arrangement direction of the grids in the first arc extinguishing chamber. 9. The circuit breaker of claim 8, wherein: It also includes two opposite side plates, the first arc extinguishing chamber and the second arc extinguishing chamber are installed on the side plates, The second insulator also includes an end plate arranged on the second body, the end plate is arranged on one end of the second body in the stacking direction of multiple grids in the first arc extinguishing chamber, the end plate is The two opposite ends of the board along the fourth direction are snapped to the two side boards respectively. 10. The circuit breaker according to claim 8, wherein the first arc extinguishing chamber includes a first end and a second end opposite in the stacking direction, and the second arc extinguishing chamber includes two opposite ends in the stacking direction. The third end and the fourth end, the projection of the first arc extinguishing chamber on the second arc extinguishing chamber along the first direction covers the fourth end, and the second arc extinguishing chamber along the first direction in which the projection of the first interrupter covers the first end, The second insulator further includes an air guiding plate, the air guiding plate is connected to the second body, and the air guiding plate includes a fifth end stacked with the first end and a fifth end stacked with the fourth end. the sixth end arranged in layers, the gas guide plate guides the gas in the first arc extinguishing chamber to discharge to the exhaust port along the direction from the fifth end to the sixth end, The first insulator extends from the third end to the fourth end and has a limiting protrusion facing the sixth end, and a limiting groove is formed on the side of the sixth end facing the fourth end , the limiting groove is used for accommodating the limiting protrusion and forming a limiting position for the limiting protrusion in the first direction. 11. The circuit breaker according to claim 10, wherein the arc guide member includes a seventh end stacked with the fourth end, and the sixth end of the air guide plate faces the second arc extinguishing A slot is formed on one side of the fourth end of the chamber, and the seventh end of the arc guide member can be inserted into the slot. 12. The circuit breaker according to claim 1, further comprising two symmetrically arranged first arc gathering pieces and two symmetrically arranged second arc gathering pieces, At least part of the first arc gathering member is disposed between the first arc extinguishing chamber and the contact system, the first arc gathering member includes second surfaces facing each other, and the two first arc gathering members A first slit is formed between the two second surfaces of the arc member, so that the arc moves along the first slit to the first arc extinguishing chamber, and the first arc gathering member and the second surface On the side opposite to the fourth direction, there is provided a first limiting groove that is inserted one by one with at least part of the grid pieces of the first arc extinguishing chamber, and the fourth direction is perpendicular to the first direction and the The lamination direction of multiple grids in the first arc extinguishing chamber; At least a part of the second arc extinguishing member is disposed between the first arc extinguishing chamber and the second arc extinguishing chamber, the second arc extinguishing member includes third surfaces facing each other, and the two first arc extinguishing members A second slit is formed between the two third surfaces of the two arc gathering parts, so that the arc moves along the second slit to the second arc extinguishing chamber, and the second arc gathering part is connected with the first arc extinguishing chamber. The three surfaces are provided with second limiting grooves on the side opposite to the third direction, which are inserted one by one with at least part of the grid pieces of the second arc extinguishing chamber, and the third direction is perpendicular to the first direction and The lamination direction of the plurality of grids in the second arc extinguishing chamber. 13. The circuit breaker according to claim 12, wherein the fourth direction is parallel to the third direction, the first arc gathering member comprises a first arc gathering part and a second arc gathering part, The first arc gathering part is located between the first arc extinguishing chamber and the contact system, and the second arc gathering part is located on one side of the first arc extinguishing chamber in its own grid stacking direction, One end of the second arc gathering part facing the second arc extinguishing chamber has a first stepped surface, and one end of the second arc gathering part facing the contact system has a second stepped surface, and the first stepped surface It abuts and cooperates with the second stepped surface to form a limit of the first arc gathering member and the second arc gathering member in the third direction. 14. The circuit breaker of claim 1, wherein: The contact system includes a static contact, the static contact is arranged opposite to the second arc extinguishing chamber in the first direction, and the arc root of the static contact can be transferred to the second arc extinguishing chamber , The static contact includes a bearing plate, an arc blocking member and a static contact, the static contact is arranged on the side of the carrying plate facing the arc extinguishing assembly, and the arc blocking member is attached to the carrying plate A side facing the arc extinguishing assembly is arranged around the static contact, and the arc blocking member is used to prevent the arc root of the static contact from moving away from the second arc extinguishing chamber.

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