CN220710228U - Arc extinguishing system and circuit breaker - Google Patents

Abstract

The application discloses arc extinguishing system and circuit breaker, arc extinguishing system locates between the contact subassembly and the gas outlet of circuit breaker, include: a first arc striking assembly; the first arc extinguishing chamber is electrically connected with the contact assembly through the first arc striking assembly, and the contact assembly is arranged on one side of the first arc extinguishing chamber along the first direction; the second arc-extinguishing chamber is arranged on one side of the first arc-extinguishing chamber along the second direction, and the projection of the first arc-extinguishing chamber and the projection of the second arc-extinguishing chamber on a plane perpendicular to the second direction are overlapped, and the second arc-extinguishing chamber is arranged between the first arc-extinguishing chamber and the air outlet; the first arc extinguishing chamber is electrically connected with the second arc extinguishing chamber through the second arc striking assembly, and the second arc striking assembly is used for leading the electric arc of the first arc extinguishing chamber into the second arc extinguishing chamber. The arc extinguishing system and the circuit breaker increase the capacity of the arc extinguishing chamber in the limited space inside the circuit breaker shell, ensure the arc extinguishing effect, and simultaneously can not increase the whole volume of the circuit breaker, and reduce the transformation cost of the circuit breaker.

Description

Arc extinguishing system and circuit breaker

Technical Field

The application belongs to the technical field of circuit breakers, and particularly relates to an arc extinguishing system and a circuit breaker.

Background

The breaker can produce electric arc when breaking direct current voltage, if do not carry out the arc extinction operation to the electric arc, the electric arc can form the flashover that breaks away from the breaker, and the existence of flashover can produce the influence to the breaker, causes the burnout of circuit breaker and circuit breaker external line and equipment. To avoid damaging the circuit breaker, the circuit breaker typically employs an arc chute in which stacked arc chute plates are provided to divide the passing arc for partial pressure and cooling of the arc.

At present, due to the improvement of the overall voltage of the system, in order to realize complete arc extinction, the space of the arc extinguishing chamber and the overall length of the arc extinguishing grid sheet are required to be increased so as to increase the path length of the arc passing through the arc extinguishing grid sheet, and thus the arc is completely extinguished. But the increase of the whole length of explosion chamber space and arc extinguishing bars piece can cause the whole length increase of circuit breaker, not only can make the whole volume increase of circuit breaker, still need carry out whole transformation to the shell shape of circuit breaker, has increased whole manufacturing cost.

Disclosure of Invention

The utility model provides an arc extinguishing system and circuit breaker has increased explosion chamber capacity in the inside limited space of circuit breaker casing, has guaranteed the arc extinguishing effect, can not increase the whole volume of circuit breaker simultaneously, has reduced the transformation cost of circuit breaker.

The application provides an arc extinguishing system, wherein locates between the contact subassembly and the gas outlet of circuit breaker, inside the casing of circuit breaker was all located to arc extinguishing system, contact subassembly and gas outlet, arc extinguishing system includes: a first arc striking assembly; the first arc extinguishing chamber is electrically connected with the contact assembly through a first arc striking assembly, and the contact assembly is arranged on one side of the first arc extinguishing chamber along the first direction; the second arc-extinguishing chamber is arranged on one side of the first arc-extinguishing chamber along the second direction, and the projection of the first arc-extinguishing chamber and the projection of the second arc-extinguishing chamber on a plane perpendicular to the second direction are overlapped, and the second arc-extinguishing chamber is arranged between the first arc-extinguishing chamber and the air outlet; the first arc extinguishing chamber is electrically connected with the second arc extinguishing chamber through the second arc striking assembly, and the second arc striking assembly is used for leading the electric arc of the first arc extinguishing chamber into the second arc extinguishing chamber.

The arc extinguishing system as above, wherein the inlet of the first arc extinguishing chamber is arranged on one side of the arc extinguishing system close to the contact assembly and faces the contact assembly, and the outlet of the first arc extinguishing chamber and the inlet of the second arc extinguishing chamber are arranged on one side of the arc extinguishing system far away from the contact assembly and face away from the contact assembly.

The arc extinguishing system as above, wherein the arc extinguishing system further comprises: the insulating isolation board, one side along the second direction of insulating isolation board is all located to first striking subassembly and first explosion chamber, and the opposite side along the second direction of insulating isolation board is located to the second explosion chamber, and the insulating isolation board is strideed across to the second striking subassembly along the second direction setting.

The arc extinguishing system as above, wherein the arc extinguishing system further comprises: and the exhaust channel extends along the first direction, the outlet of the exhaust channel is arranged on one side of the arc extinguishing system away from the contact assembly, the exhaust channel is arranged on one side of the second arc extinguishing chamber away from the first arc extinguishing chamber along the second direction, one end of the exhaust channel is communicated with the second arc extinguishing chamber, and the other end of the exhaust channel is communicated with the air outlet.

The arc extinguishing system comprises a first arc striking component, a second arc striking component and a contact component, wherein the first arc striking component comprises first arc striking pieces and second arc striking pieces which are arranged at intervals along a third direction, the first arc extinguishing chamber comprises two first grid piece components which are arranged at intervals along the third direction, the first grid piece components comprise a plurality of grid pieces which are arranged in a stacking mode along the third direction, and the contact component is electrically connected with the two first grid piece components through the first arc striking pieces and the second arc striking pieces respectively.

The arc extinguishing system comprises a first arc striking assembly, a second arc striking assembly and a third arc striking assembly, wherein the first arc striking assembly is connected with the first arc striking assembly, the second arc striking assembly is connected with the second arc striking assembly, the second arc striking assembly is connected with the third arc striking assembly, and an arc channel is arranged between the second arc striking assembly and the second arc extinguishing chamber.

The arc extinguishing system comprises a first arc extinguishing chamber and a second arc extinguishing chamber, wherein the first arc extinguishing chamber comprises a first grid assembly, the first grid assembly comprises a plurality of grid plates which are arranged in a stacked mode along a first direction, the first grid assembly comprises a first arc inlet and a first arc outlet, the first arc inlet is communicated with an arc channel, and two first arc striking sections are respectively arranged on two side faces of the first grid assembly along the first direction.

The arc extinguishing system comprises a first arc extinguishing chamber, a first grid sheet component, a second arc extinguishing chamber and a second arc extinguishing chamber, wherein the first arc extinguishing chamber further comprises two first breakdown preventing pieces, the first grid sheet component comprises a first arc inlet and a first arc discharge opening, the two first arc inlet are respectively arranged towards a first arc striking sheet and a second arc striking sheet, and the two first breakdown preventing pieces are respectively covered on the two first arc discharge openings.

The arc extinguishing system as above, wherein the first arc extinguishing chamber further comprises two dissociation components, the dissociation subassembly locates a side that prevents breaking through the piece and keep away from first row arc mouth, and the dissociation subassembly that disappears includes the fender arc board and the dissociation net that are connected.

The arc extinguishing system, wherein the second arc extinguishing chamber further comprises a second breakdown preventing piece, and the second breakdown preventing piece is covered on the second arc discharge port.

On the other hand, the application still provides a circuit breaker, and wherein, the circuit breaker includes contact assembly, total gas outlet, casing and foretell arc extinguishing system, and contact assembly includes a plurality of first contacts and a plurality of second contacts, along the second direction, the second contact is located near one side of first explosion chamber and is connected with first explosion chamber electricity, and the second contact is along the direction protrusion in first contact setting towards arc extinguishing system.

The utility model provides an arc extinguishing system includes first arc striking subassembly, first explosion chamber, second explosion chamber and second arc striking subassembly, contact assembly locates one side along the first direction of first explosion chamber and through first arc striking subassembly electrical connection, first arc striking subassembly can be with the arc introduction first explosion chamber to carry out the arc extinction, second explosion chamber and first explosion chamber arrange along the second direction and through second arc striking subassembly electrical connection, second arc striking subassembly can introduce the remaining electric arc after the arc extinction of first arc striking subassembly to the second explosion chamber, in order to realize complete arc extinction, the arc extinguishing effect has been guaranteed, and the inside space in the second direction of casing of circuit breaker of second explosion chamber rational utilization, and after the first explosion chamber was located along first direction to continue, consequently, need not to increase the casing of circuit breaker at the length of first direction, the improvement cost of circuit breaker has been reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.

Fig. 1 is a schematic diagram of an internal structure of a circuit breaker according to an embodiment of the present application;

fig. 2 is a schematic diagram of the overall structure of the arc extinguishing system according to the embodiment of the present application;

FIG. 3 is a schematic diagram of the path of an arc in a circuit breaker according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a first arc extinguishing chamber of the arc extinguishing system according to the embodiment of the present application;

fig. 5 is a schematic structural diagram of a second arc extinguishing chamber of the arc extinguishing system according to the embodiment of the present application;

fig. 6 is an exploded view of a circuit breaker according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a second arc discharge port and a second breakdown preventing member of the arc extinguishing system according to the embodiment of the present application;

fig. 8 is a schematic structural view of a second arc striking assembly of the arc extinguishing system according to an embodiment of the present application;

fig. 9 is a schematic diagram of a current loop in the arc extinguishing system according to the embodiment of the present application;

fig. 10 is a schematic structural view of a contact assembly of a circuit breaker according to an embodiment of the present application.

Reference numerals illustrate:

10. an arc extinguishing system; 20. a contact assembly; 21. a first contact; 22. a second contact; 30. an air outlet; 40. a housing; 50. a first arc striking assembly; 51. a first striking plate; 52. a second striking plate; 60. a first arc extinguishing chamber; 61. a first grid assembly; 62. a first arc inlet; 63. a first arc discharge port; 64. a first breakdown preventing member; 65. a disassociation component; 651. an arc baffle; 652. eliminating free net; 70. a second arc extinguishing chamber; 71. a second grid assembly; 72. a second arc inlet; 73. a second row of arc ports; 74. a second puncture preventing member; 80. a second arc striking assembly; 81. a third striking plate; 82. a first arc-guiding section; 83. a connection section; 831. a first connection section; 832. a second connection section; 84. a second arc-guiding section; 85. an arc path; 90. an insulating spacer; 100. an exhaust passage;

x, a first direction; y, second direction; z, third direction.

Detailed Description

Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative of the application and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.

As shown in fig. 1 and 2, the embodiment of the present application provides an arc extinguishing system, wherein, between a contact assembly 20 and an air outlet 30 of a circuit breaker, the arc extinguishing system 10, the contact assembly 20 and the air outlet 30 are all disposed inside a housing 40 of the circuit breaker, and the arc extinguishing system 10 includes: a first arc striking assembly 50; the first arc extinguishing chamber 60, the first arc extinguishing chamber 60 is electrically connected with the contact assembly 20 through the first arc striking assembly 50, and the contact assembly 20 is arranged on one side of the first arc extinguishing chamber 60 along the first direction X; the second arc-extinguishing chamber 70 is arranged on one side of the first arc-extinguishing chamber 60 along the second direction Y, the projection of the first arc-extinguishing chamber 60 and the projection of the second arc-extinguishing chamber 70 on a plane perpendicular to the second direction Y are overlapped, and the second arc-extinguishing chamber 70 is arranged between the first arc-extinguishing chamber 60 and the air outlet 30; the second arc striking assembly 80, the first arc extinguishing chamber 60 is electrically connected with the second arc extinguishing chamber 70 through the second arc striking assembly 80, and the second arc striking assembly 80 is used for introducing the arc of the first arc extinguishing chamber 60 into the second arc extinguishing chamber 70.

During implementation, the arc extinguishing system of the application comprises the first arc striking component 50, the first arc extinguishing chamber 60, the second arc extinguishing chamber 70 and the second arc striking component 80, the contact component 20 is arranged on one side of the first arc extinguishing chamber 60 along the first direction X and is electrically connected with the first arc striking component 50, the first arc striking component 50 can introduce an electric arc into the first arc extinguishing chamber 60 to extinguish the arc, the second arc extinguishing chamber 70 and the first arc extinguishing chamber 60 are distributed along the second direction Y and are electrically connected with the second arc striking component 80, the second arc striking component 80 can introduce residual electric arcs after the arc extinguishing of the first arc striking component 50 into the second arc extinguishing chamber 70 so as to realize complete arc extinguishing, the arc extinguishing effect is guaranteed, the second arc extinguishing chamber 70 reasonably utilizes the space of the inner part of the shell 40 of the circuit breaker in the second direction Y, and the first arc extinguishing chamber 60 is not continuously arranged along the first direction X, so that the length of the shell 40 of the circuit breaker in the first direction X is not required to be increased, and the transformation cost of the circuit breaker is reduced.

As shown in fig. 1 and 3, in the arc extinguishing system of the embodiment of the present application, the inlet of the first arc extinguishing chamber 60 is disposed on a side of the arc extinguishing system 10 close to the contact assembly 20 and is disposed facing the contact assembly 20, and the outlet of the first arc extinguishing chamber 60 and the inlet of the second arc extinguishing chamber 70 are disposed on a side of the arc extinguishing system 10 far away from the contact assembly 20 and is disposed opposite to the contact assembly 20.

In particular, when the contact assembly 20 generates an arc, the arc can directly enter the first arc-extinguishing chamber 60 to extinguish the arc under the action of the striking of the first striking assembly 50 through the inlet of the first arc-extinguishing chamber 60 facing the contact assembly 20, after the arc passes through the first arc-extinguishing chamber 60, the residual arc after arc extinction reaches one side of the arc-extinguishing system 10 far away from the contact assembly 20, a part of the residual arc enters the second arc-extinguishing chamber 70 under the action of the striking of the first striking assembly 50 through the inlet of the second arc-extinguishing chamber 70 facing away from the contact assembly 20, and the other part of the residual arc is discharged to the outside through the outlet of the first arc-extinguishing chamber 60. The arrangement of the inlet positions of the first arc-extinguishing chamber 60 and the second arc-extinguishing chamber 70 enables the arc to pass through the complete first arc-extinguishing chamber 60 along the first direction X and to reach the inlet of the second arc-extinguishing chamber 70 or to be discharged to the outside from the outlet of the first arc-extinguishing chamber 60, so that the arc-extinguishing effect of the first arc-extinguishing chamber 60 can be fully utilized, thereby achieving the optimal arc-extinguishing effect.

Specifically, the inner surface of the case 40 disposed opposite to the outlet of the first arc extinguishing chamber 60 and the inlet of the second arc extinguishing chamber 70 is an arc surface capable of guiding the arc, and guiding the arc discharged from the outlet of the first arc extinguishing chamber 60 to the inlet of the second arc extinguishing chamber 70.

As shown in fig. 1, the arc extinguishing system 10 according to the embodiment of the present application further includes: the insulating isolation plate 90, the first arc striking subassembly 50 and the first explosion chamber 60 are all located one side of insulating isolation plate 90 along second direction Y, the opposite side along second direction Y is located to insulating isolation plate 90 to the second explosion chamber 70, the second arc striking subassembly 80 is striden across insulating isolation plate 90 along second direction Y and is set up, make the first explosion chamber 60 and the second explosion chamber 70 that locate insulating isolation plate 90 both sides can carry out electric connection, the electric arc also can be discharged through the export of first explosion chamber 60, and introduce to the inside further arc extinguishing of second explosion chamber 70 by second arc striking subassembly 80.

In specific implementation, the arrangement of the insulating isolation board 90 can avoid the first arc-extinguishing chamber 60 and the second arc-extinguishing chamber 70 being communicated in the second direction Y, so as to avoid the situation that the arc directly enters the second arc-extinguishing chamber 70 in the process of passing through the first arc-extinguishing chamber 60 along the first direction X, which can result in that the arc is not completely extinguished along the first direction X, and the best arc-extinguishing effect cannot be achieved, and the air exhausted by the second arc-extinguishing chamber 70 still contains partial arc, so that damage to the circuit breaker is caused.

As shown in fig. 1, the arc extinguishing system 10 according to the embodiment of the present application further includes: the exhaust passage 100 extends along the first direction X, the outlet of the exhaust passage 100 is arranged on one side of the arc extinguishing system 10 away from the contact assembly 20, the exhaust passage 100 is arranged on one side of the second arc extinguishing chamber 70 away from the first arc extinguishing chamber 60 along the second direction Y, one end of the exhaust passage 100 is communicated with the second arc extinguishing chamber 70, and the other end is communicated with the air outlet 30.

In particular, when the contact assembly 20 acts, an arc and gas are generated at the same time, after the arc is extinguished by the second arc extinguishing chamber 70, the remaining gas is discharged into the exhaust channel 100 from the outlet of the second arc extinguishing chamber 70, the gas flows to the outlet of the exhaust channel 100 along the first direction X, and in the flowing process in the exhaust channel 100, the residual charged particles in the gas gradually disappear, so that the phenomenon that the gas is broken down again to form flashover after being discharged from the outlet of the exhaust channel 100 is avoided, and the occurrence of the condition that the flashover damages the circuit breaker is avoided.

Specifically, the outlet of the second arc-extinguishing chamber 70 and the inlet of the exhaust channel 100 are both arranged on one side of the arc-extinguishing system 10, which is close to the contact assembly 20, and are in communication, and the electric arc can completely pass through the whole of the second arc-extinguishing chamber 70 along the first direction X in the process of moving from the inlet of the second arc-extinguishing chamber 70 to the outlet, so that the complete arc extinction is realized, the optimal arc extinction effect is achieved, the inlet and the outlet of the exhaust channel 100 are respectively arranged at the top and the bottom of the arc-extinguishing system 10, the length of the exhaust channel 100 along the first direction X is ensured, and the electric particles in the gas can be sufficiently eliminated in the process of passing through the exhaust channel 100.

In particular, as shown in fig. 3, the arrow direction in the drawing is the path of the arc and the gas, the arc and the gas enter from the inlet of the first arc extinguishing chamber 60, move along the first direction X, after the arc extinguishing of the first arc extinguishing chamber 60, reach the outlet at the top of the first arc extinguishing chamber 60, the arc and the gas enter into the inlet at the top of the second arc extinguishing chamber 70 under the action of the striking of the second striking component 80, move along the first direction X to the bottom, after the arc extinguishing of the second arc extinguishing chamber 70, the gas is discharged from the outlet at the bottom of the second arc extinguishing chamber 70 to the inlet of the exhaust channel 100, and the gas flows in the first direction X in the exhaust channel 100 to the outlet at the top of the exhaust channel 100 and is discharged from the outlet. The first arc extinguishing chamber 60, the second arc extinguishing chamber 70, and the inlet and outlet of the exhaust passage 100 are positioned so that the arc and gas can be sufficiently extinguished in a limited space within the case 40 of the circuit breaker.

As shown in fig. 2 and fig. 4, in the arc extinguishing system of the embodiment of the present application, the first arc striking assembly 50 includes a first arc striking plate 51 and a second arc striking plate 52 that are disposed at intervals along a third direction Z, the first arc extinguishing chamber 60 includes two first grid assemblies 61 that are disposed at intervals along the third direction Z, the first grid assemblies 61 include a plurality of grid plates that are disposed in a stacked manner along the third direction Z, and the contact assembly 20 is electrically connected with the two first grid assemblies 61 through the first arc striking plate 51 and the second arc striking plate 52, respectively.

In specific implementation, the first striking piece 51 and the second striking piece 52 can respectively introduce most of the electric arcs formed by the contact assemblies 20 into the two first grid piece assemblies 61, so that the first grid piece assemblies 61 arc the electric arcs inside, in the arc extinguishing process, the grid pieces stacked along the third direction Z can divide the long electric arcs into multiple sections of short electric arcs, and after the short electric arcs pass through the grid pieces extending along the first direction X, most of the electric arcs can be extinguished and discharged from the outlet of the first arc extinguishing chamber 60.

Specifically, the first striking plate 51 and the second striking plate 52 are respectively connected to two opposite sides of the two first grid plate assemblies 61, and the arrangement can enable the electric arc to enter all the grid plates, so that the arc extinguishing effect of the two first grid plate assemblies 61 can be effectively ensured.

As shown in fig. 2 and 5, in the arc extinguishing system of the embodiment of the present application, the second arc striking assembly 80 includes two third arc striking pieces 81 that are disposed at intervals along the third direction Z, the third arc striking pieces 81 include a first arc striking section 82, a connecting section 83 and a second arc striking section 84 that are connected, the first arc striking sections 82 of the two third arc striking pieces 81 are respectively electrically connected with the two first grid assemblies 61, and the two first arc striking sections 82 are disposed between the two first grid assemblies 61, the two second arc striking sections 84 are electrically connected with the second arc extinguishing chamber 70, and an arc channel 85 is provided between the two third arc striking pieces 81.

In particular, a portion of the arc formed by the contact assembly 20 enters the two first grid assemblies 61 to extinguish the arc, and another portion is located between the two first grid assemblies 61 and enters the arc channel 85, passes through the connecting section 83 and the second arc guiding section 84, and enters the second arc extinguishing chamber 70 to extinguish the arc.

As shown in fig. 2 and 7, in the arc extinguishing system of the embodiment of the present application, the second arc extinguishing chamber 70 includes a second grid assembly 71, the second grid assembly 71 includes a plurality of grids stacked along a third direction Z, the second grid assembly 71 includes a second arc inlet 72 and a second arc outlet 73, the second arc inlet 72 is in communication with an arc channel 85, two second arc guiding segments 84 are respectively disposed on two sides of the second grid assembly 71 along the third direction Z, the arc is diffused into the wider second grid assembly 71 by the narrower arc channel 85 under the guidance of the connecting segment 83 and the second arc guiding segment 84, the whole arc presents an elongated state, and the elongated arc is divided into short arcs by the grids stacked along the third direction Z for arc extinguishing, so as to promote the arc extinguishing effect.

In specific implementation, the second arc inlet 72 is disposed at the inlet of the second arc extinguishing chamber 70, so that the arc in the arc channel 85 can be introduced into the second grid assembly 71 to extinguish the arc, the second arc outlet 73 is disposed at the outlet of the second arc extinguishing chamber 70, so that the arc and gas after arc extinction can be discharged out of the second grid assembly 71 and out of the second arc extinguishing chamber 70 into the exhaust channel 100.

Specifically, as shown in fig. 8, the connection section 83 includes a first connection section 831 and a second connection section 832, one end of the first connection section 831 is disposed in the first arc extinguishing chamber 60 and connected to the first arc guiding section 82, and the other end is disposed in the second arc extinguishing chamber 70 and connected to the second connection section 832, and a part of the arc passage 85 formed by the two first connection sections 831 can guide the arc in the first arc extinguishing chamber 60 into the second arc extinguishing chamber 70 so that the arc is extinguished in the second arc extinguishing chamber 70; one end of the second connecting section 832 is connected with the first connecting section 831, and the other end is connected with the second arc guiding section 84, and the second connecting section 832 is obliquely connected with the second arc guiding section 84 and the first connecting section 831, so that the width of the arc channel 85 in the third direction Z can be increased, and thus the arc channel 85 can accommodate more grid sheets to form the second grid sheet assembly 71 with an arc extinguishing effect.

In particular, fig. 9 shows a current path formed by the electric arc and the electric current together, the electric arc formed by the contact assembly 20 enters the first grid assembly 61 and the second grid assembly 71 under guidance, arrows between the grids in fig. 9 are electric arcs, meanwhile, electric currents are all present in the contact assembly 20, the first striking plate 51, the second striking plate 52 and the two third striking plates 81, the current path is formed by electrically connecting the contact assembly 20 to the first striking plate 51, the first striking plate 51 and the first third striking plate 81 through the electric arc in the first grid assembly 61, electrically connecting the first third striking plate 81 and the second third striking plate 81 through the electric arc in the second grid assembly 71, electrically connecting the second third striking plate 81 and the second striking plate 52 through the electric arc in the second first grid assembly 61, and finally, the electric current reaches the second striking plate 52 to form a current loop.

As shown in fig. 6, in the arc extinguishing system of the embodiment of the present application, the first arc extinguishing chamber 60 further includes two first breakdown preventing members 64, the first grid assembly 61 includes a first arc inlet 62 and a first arc discharge port 63, the two first arc inlet 62 are respectively disposed towards the first arc striking plate 51 and the second arc striking plate 52, and the two first breakdown preventing members 64 are respectively covered on the two first arc discharge ports 63. The first breakdown preventing member 64 is disposed such that when the arc is discharged from the first arc discharge port 63 after arc extinction, the arc is not directly discharged to the outside, but enters the first breakdown preventing member 64 to be buffered, thereby preventing the re-breakdown phenomenon occurring in the entering air.

As shown in fig. 6, in the arc extinguishing system according to the embodiment of the present application, the first arc extinguishing chamber 60 further includes two dissociation components 65, the dissociation components 65 are disposed on a side surface of the first breakdown preventing member 64 away from the first arc discharge port 63, and the dissociation components 65 include an arc blocking plate 651 and a dissociation net 652 that are connected.

In specific implementation, after the electric arc passes through the buffer of the first anti-breakdown member 64, part of the electric arc and the air with free electric particles are discharged by the first anti-breakdown member 64, the electric arc can be blocked by the arrangement of the arc blocking plate 651, the electric arc is prevented from being directly discharged into the air, the free electric particles can be eliminated by the arrangement of the free eliminating net 652, and the air discharged to the outside air does not contain the electric particles, so that the whole circuit breaker cannot be damaged.

Specifically, the first arc inlet 62 is disposed at the inlet of the first arc extinguishing chamber 60, the electric arc can enter the first grid assembly 61 from the first arc inlet 62 to extinguish the arc, the first arc outlet 63, the first anti-breakdown member 64 and the anti-breakdown member 65 are disposed at the outlet of the first arc extinguishing chamber 60, the electric arc can be processed, and the residual air flow is discharged to the outside, so that the air flow cannot break down again in the outside.

As shown in fig. 7, in the arc extinguishing system of the embodiment of the present application, the second arc extinguishing chamber 70 further includes a second breakdown preventing member 74, and the second breakdown preventing member 74 is covered on the second arc discharge port 73. The arc can directly enter the second breakdown preventing member 74 to be buffered when being discharged from the second arc discharge port 73, so that gas without arc is formed, and the gas is discharged into the outside air without damaging the circuit breaker.

As shown in fig. 1 to 10, the embodiment of the present application further provides a circuit breaker, where the circuit breaker includes a contact assembly 20, a total air outlet 30, a housing 40, and the arc extinguishing system described above, the contact assembly 20 includes a plurality of first contacts 21 and a plurality of second contacts 22, and along a second direction Y, the second contacts 22 are disposed near one side of the first arc extinguishing chamber 60 and electrically connected to the first arc extinguishing chamber 60, and the second contacts 22 are disposed protruding from the first contacts 21 along a direction toward the arc extinguishing system 10. The first contact 21 is a main contact of the contact assembly 20, the second contact 22 is an arc contact of the contact assembly 20, the second contact 22 is capable of generating an arc, and the arc enters the first arc extinguishing chamber 60 after being generated for subsequent arc extinguishing operation.

When concrete implementation, the circuit breaker of this application includes foretell arc extinguishing system, and arc extinguishing system has following technical effect: the arc extinguishing system comprises a first arc striking component 50, a first arc extinguishing chamber 60, a second arc extinguishing chamber 70 and a second arc striking component 80, wherein the contact component 20 is arranged on one side of the first arc extinguishing chamber 60 along the first direction X and is electrically connected with the first arc striking component 50, the first arc striking component 50 can introduce an electric arc into the first arc extinguishing chamber 60 to extinguish the arc, the second arc extinguishing chamber 70 and the first arc extinguishing chamber 60 are distributed along the second direction Y and are electrically connected with the second arc striking component 80, and the second arc striking component 80 can introduce residual electric arc after the arc extinguishing of the first arc striking component 50 into the second arc extinguishing chamber 70 so as to realize complete arc extinguishing, ensure the arc extinguishing effect, and the second arc extinguishing chamber 70 reasonably utilizes the space of the inner part of the shell 40 of the circuit breaker in the second direction Y and is not continuously arranged behind the first arc extinguishing chamber 60 along the first direction X, so that the length of the shell 40 of the circuit breaker in the first direction X is not required to be increased, and the transformation cost of the circuit breaker is reduced.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

In the foregoing, only the specific embodiments of the present application are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, which are intended to be included in the scope of the present application.

Claims (11)

1. An arc extinguishing system, characterized in that, locate between contact assembly (20) and gas outlet (30) of circuit breaker, arc extinguishing system (10) contact assembly (20) with gas outlet (30) are all located inside casing (40) of circuit breaker, arc extinguishing system (10) include:

a first arc striking assembly (50);

the first arc extinguishing chamber (60), the first arc extinguishing chamber (60) is electrically connected with the contact assembly (20) through the first arc striking assembly (50), and the contact assembly (20) is arranged on one side of the first arc extinguishing chamber (60) along the first direction (X);

the second arc extinguishing chamber (70) is arranged on one side of the first arc extinguishing chamber (60) along the second direction (Y), the first arc extinguishing chamber (60) and the projection of the second arc extinguishing chamber (70) on a plane perpendicular to the second direction (Y) are overlapped, and the second arc extinguishing chamber (70) is arranged between the first arc extinguishing chamber (60) and the air outlet (30);

the first arc extinguishing chamber (60) is electrically connected with the second arc extinguishing chamber (70) through the second arc striking assembly (80), and the second arc striking assembly (80) is used for leading the arc of the first arc extinguishing chamber (60) into the second arc extinguishing chamber (70).

2. The arc extinguishing system according to claim 1, characterized in that the inlet of the first arc extinguishing chamber (60) is arranged at a side of the arc extinguishing system (10) close to the contact assembly (20) and facing the contact assembly (20), and the outlet of the first arc extinguishing chamber (60) and the inlet of the second arc extinguishing chamber (70) are both arranged at a side of the arc extinguishing system (10) remote from the contact assembly (20) and facing away from the contact assembly (20).

3. The arc extinguishing system according to claim 1, wherein the arc extinguishing system (10) further comprises:

the insulating isolation board (90), first striking subassembly (50) with first explosion chamber (60) are all located insulating isolation board (90) are followed one side of second direction (Y), second explosion chamber (70) are located insulating isolation board (90) are followed opposite side of second direction (Y), second striking subassembly (80) are followed second direction (Y) are strideed across insulating isolation board (90) setting.

4. The arc extinguishing system according to claim 1, wherein the arc extinguishing system (10) further comprises:

the exhaust passage (100) extends along the first direction (X), an outlet of the exhaust passage (100) is arranged on one side, away from the contact assembly (20), of the arc extinguishing system (10), the exhaust passage (100) is arranged on one side, away from the first arc extinguishing chamber (60), of the second arc extinguishing chamber (70) along the second direction (Y), one end of the exhaust passage (100) is communicated with the second arc extinguishing chamber (70), and the other end of the exhaust passage (100) is communicated with the air outlet (30).

5. The arc extinguishing system according to claim 1, characterized in that the first arc striking assembly (50) comprises a first arc striking plate (51) and a second arc striking plate (52) which are arranged at intervals along a third direction (Z), the first arc extinguishing chamber (60) comprises two first grid plate assemblies (61) which are arranged at intervals along the third direction (Z), the first grid plate assemblies (61) comprise a plurality of grid plates which are arranged in a stacked manner along the third direction (Z), and the contact assembly (20) is electrically connected with the two first grid plate assemblies (61) through the first arc striking plate (51) and the second arc striking plate (52) respectively.

6. The arc extinguishing system according to claim 5, characterized in that the second arc striking assembly (80) comprises two third arc striking pieces (81) arranged at intervals along the third direction (Z), the third arc striking pieces (81) comprise a first arc striking section (82), a connecting section (83) and a second arc striking section (84) which are connected, the first arc striking sections (82) of the two third arc striking pieces (81) are respectively electrically connected with the two first grid assemblies (61), the two first arc striking sections (82) are arranged between the two first grid assemblies (61), the two second arc striking sections (84) are electrically connected with the second arc extinguishing chamber (70), and an arc passage (85) is arranged between the two third arc striking pieces (81).

7. The arc extinguishing system according to claim 6, characterized in that the second arc extinguishing chamber (70) comprises a second grid assembly (71), the second grid assembly (71) comprises a plurality of grids stacked along the third direction (Z), the second grid assembly (71) comprises a second arc inlet (72) and a second arc outlet (73), the second arc inlet (72) is communicated with the arc channel (85), and two second arc guiding segments (84) are respectively arranged on two sides of the second grid assembly (71) along the third direction (Z).

8. The arc extinguishing system according to claim 5, wherein the first arc extinguishing chamber (60) further comprises two first breakdown preventing members (64), the first grid plate assembly (61) comprises a first arc inlet (62) and a first arc discharge opening (63), the two first arc inlet (62) are respectively arranged towards the first arc striking plate (51) and the second arc striking plate (52), and the two first breakdown preventing members (64) are respectively covered on the two first arc discharge openings (63).

9. The arc extinguishing system of claim 8, wherein the first arc extinguishing chamber (60) further comprises two dissociation components (65), the dissociation components (65) are disposed on a side of the first anti-breakdown element (64) away from the first arc discharge ports (63), and the dissociation components (65) comprise arc blocking plates (651) and dissociation nets (652) that are connected.

10. The arc extinguishing system according to claim 7, characterized in that the second arc extinguishing chamber (70) further comprises a second breakdown preventing member (74), the second breakdown preventing member (74) being covered at the second arc discharge opening (73).

11. A circuit breaker, characterized in that it comprises a contact assembly (20), a total air outlet (30), a housing (40) and an arc extinguishing system according to any of claims 1 to 10, said contact assembly (20) comprising a plurality of first contacts (21) and a plurality of second contacts (22), said second contacts (22) being arranged adjacent to one side of said first arc extinguishing chamber (60) and electrically connected to said first arc extinguishing chamber (60), said second contacts (22) being arranged protruding from said first contacts (21) in a direction towards said arc extinguishing system (10).