CN218160248U - Circuit breaker - Google Patents

Abstract

The application provides a circuit breaker relates to low-voltage apparatus technical field, through setting up the arc extinguishing passageway into the passageway that has bent to the length of effectual increase arc extinguishing passageway, and the utilization is bent and can be made the arc extinguishing passageway fully with the gaseous contact of arc extinguishing, thereby improve the cooling capacity of arc extinguishing passageway, and then improve the security performance of circuit breaker. Simultaneously, set up the gas outlet with the arc extinguishing passageway in the bottom of circuit breaker casing, can make the arc extinguishing gaseous bottom by the casing discharge to make carminative position farther apart from the front of circuit breaker casing, avoid the gaseous safety problem that probably causes the positive user side of circuit breaker casing of arc extinguishing, effectively improve the security performance of circuit breaker.

Description

Circuit breaker

Technical Field

The application relates to the technical field of low-voltage apparatuses, in particular to a circuit breaker.

Background

With the rapid development of economy, the living standard of people is rapidly improved, and the safety of household electricity utilization is required to be higher. The circuit breaker may be installed in a terminal distribution line. Meanwhile, the circuit can be connected, carried and disconnected under the condition of normal or abnormal circuit, and the circuit and the electrical equipment are effectively protected.

The front of current circuit breaker for the convenience of user's operation usually sets up the operation end at the circuit breaker, distribute in the middle part of circuit breaker with operation end drive complex sound contact thereupon, it is corresponding, for the convenience of exhaust, set up the gas outlet in the side of circuit breaker, can make sound contact and gas outlet intercommunication form and be used for carminative sharp passageway, thus, though can be through sharp passageway as fast as possible with the gaseous discharge of arc extinguishing, but, be subject to the size of circuit breaker, the length of sharp passageway is shorter, be unfavorable for the gaseous cooling of arc extinguishing, cause the safety problem easily.

Disclosure of Invention

An object of this application lies in, to the not enough among the above-mentioned prior art, provides a circuit breaker to improve the straight line passageway and the gas outlet of current circuit breaker and set up the unreasonable safety problem that leads to.

In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:

one aspect of the embodiment of the application provides a circuit breaker, including the casing and set up in the actuating mechanism of casing, actuating mechanism has the operating end that is located the casing front, sets up arc extinguishing channel in the casing, and one port and the actuating mechanism of arc extinguishing channel correspond, and another port of arc extinguishing channel extends to the casing back and communicates with the bottom gas outlet at the casing back, and arc extinguishing channel has at least one and bends.

Optionally, the arc extinguishing channel includes a first channel and a second channel, the first channel corresponds to the actuator, the first channel extends toward the side of the housing and is communicated with the second channel, and the second channel is communicated with the air outlet at the bottom of the back of the housing.

Optionally, a first flame-extinguishing expanded metal is arranged in the arc-extinguishing channel along a radial section of the arc-extinguishing channel.

Optionally, the first flame-extinguishing metal mesh includes a metal plate and a through hole array distributed on the metal plate.

Optionally, a second flame-extinguishing metal mesh is arranged in the arc-extinguishing channel along the radial section of the arc-extinguishing channel, and the second flame-extinguishing metal mesh is located between the first flame-extinguishing metal mesh and the bottom air outlet.

Optionally, the second flame-extinguishing metal mesh includes multiple layers of metal meshes stacked axially along the arc-extinguishing channel, and meshes of two adjacent layers of metal meshes are distributed in a staggered manner.

Optionally, a lateral air outlet is further disposed on a side surface of the housing, the first channel is communicated with the lateral air outlet, and a third flame-extinguishing metal mesh is disposed at the lateral air outlet of the housing.

Optionally, the third flame-extinguishing metal mesh includes at least one layer of insulating plate and at least one layer of metal wire mesh which are sequentially stacked along the air outlet direction of the lateral air outlet, and via hole arrays are distributed on the insulating plate.

Optionally, the third flame-extinguishing metal mesh comprises a plurality of layers of metal wire meshes, and meshes of two adjacent layers of metal wire meshes are distributed in a staggered manner.

Optionally, the air outlet rate of the lateral air outlet is smaller than the air outlet rate of the bottom air outlet.

Optionally, the length of the second channel is greater than or equal to one half of the maximum width of the first channel.

Optionally, when the arc extinguishing channel includes a first channel and a second channel, a distance between the first flame-extinguishing metal mesh and the second flame-extinguishing metal mesh is greater than or equal to one half of a length of the second channel.

The beneficial effect of this application includes:

the application provides a circuit breaker through setting up the arc extinguishing passageway into having the passageway of bending to the length of effectual increase arc extinguishing passageway, and the utilization is bent and can be made the arc extinguishing passageway fully with the gaseous contact of arc extinguishing, thereby improves the cooling capacity of arc extinguishing passageway, and then improves the security performance of circuit breaker. Simultaneously, set up the gas outlet of arc extinguishing passageway in the bottom of circuit breaker casing, can make the arc extinguishing gas be discharged by the bottom of casing to make carminative position farther apart from the front of circuit breaker casing, avoid the arc extinguishing gas to the safety problem that the positive user side of circuit breaker casing probably caused, effectively improve the security performance of circuit breaker.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

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

fig. 2 is a schematic structural diagram of a first flame-extinguishing metal mesh provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a second flame-extinguishing metal mesh provided in an embodiment of the present application;

fig. 4 is a second schematic structural diagram of a circuit breaker according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a third flame-extinguishing metal mesh provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of a contact system according to an embodiment of the present disclosure;

fig. 7 is a second schematic structural view of a contact system according to an embodiment of the present disclosure;

fig. 8 is a third schematic structural diagram of a circuit breaker according to an embodiment of the present application.

Icon: 110-a housing; 111-front side; 112-lateral; 113-back side; 120-an actuator; 121-an operation end; 122-moving contact; 123-fixed contact; 124-arc striking plate; 125-flash barrier; 126-a rotating shaft; 127-riveting hole; 130-a first flame-out metal mesh; 131-a metal plate; 132-a via; 140-a second flame-extinguishing metal mesh; 141-a first wire mesh; 150-a third flame-out metal mesh; 151-a holder; 152-an insulating plate; 153-via holes; 154-a second wire mesh; 160-grid sheet; 161-arc extinguishing housing; 170-arc extinguishing channel; 171-a first channel; 172-a second channel; 1721-a first sub-channel; 1722-a second subchannel; 173-bending; 180-bottom air outlet; 190-lateral air outlets; 200-bridge type contact modules; 210-main body.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. It should be noted that, in case of conflict, various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

An aspect of this application embodiment provides a circuit breaker, through setting up the arc extinguishing passageway into having the passageway of bending to effectual increase arc extinguishing passageway's length, and the utilization is bent and can be made the arc extinguishing passageway abundant with the gaseous contact of arc extinguishing, thereby improves the cooling capacity of arc extinguishing passageway, and then improves the security performance of circuit breaker. Simultaneously, set up the gas outlet of arc extinguishing passageway in the bottom of circuit breaker casing, can make the arc extinguishing gas be discharged by the bottom of casing to make carminative position farther apart from the front of circuit breaker casing, avoid the arc extinguishing gas to the safety problem that the positive user side of circuit breaker casing probably caused, effectively improve the security performance of circuit breaker. Embodiments of the present application will be described below with reference to the accompanying drawings.

Referring to fig. 1, a circuit breaker is shown, which includes a housing 110 and an actuator 120 disposed on the housing 110, wherein the actuator 120 has an operating end 121, and for facilitating a user operation, the operating end 121 is located on a front surface 111 of the housing 110, that is, a top surface of the housing 110 in fig. 1. The actuating mechanism 120 can control the on/off state of the circuit breaker, that is, the actuating mechanism 120 is driven by external force, so as to change the on/off state of the actuating mechanism 120, thereby realizing the on/off of the circuit breaker.

For example: the actuating mechanism 120 comprises a handle, an operating mechanism, a movable contact 122 and a fixed contact 123, when the circuit breaker is connected to the load loop, the corresponding movable contact 122 and the corresponding fixed contact 123 are connected to the load loop, the handle is used as an operating end 121, and the handle is connected with the movable contact 122 through the operating mechanism, so that when the circuit breaker needs to be switched on, the handle drives the operating mechanism to drive the movable contact 122 to move from a switching-off position to a switching-on position so as to be in contact with the fixed contact 123, and the load loop is switched on; when the brake is required to be opened, the operating mechanism can be driven by external force to drive the moving contact 122 to reset, that is, the moving contact 122 is separated from the static contact 123, and the moving contact 122 moves from the closing position to the opening position, at this time, the load loop is disconnected.

Move the in-process to the separating brake position by the closing position at moving contact 122, can produce electric arc between moving contact 122 and static contact 123, can produce a large amount of high temperature high pressure and contain metallic ion's arc extinguishing gas thereupon at the arc extinguishing in-process, the circuit breaker need carry out effectual cooling and filtration to arc extinguishing gas, just can reduce the danger that brings after the arc extinguishing gas discharges, and then make the circuit breaker have better security performance.

Referring to fig. 1, an arc extinguishing channel 170 is further disposed in the housing 110, and a port of the arc extinguishing channel 170 is directly corresponding to the movable contact 122 and the stationary contact 123 of the actuator 120, so that an arc generated between the movable contact 122 and the stationary contact 123 enters the arc extinguishing channel 170, and another port of the arc extinguishing channel 170 extends to the back surface 113 of the housing 110, i.e., the bottom of the housing 110 in fig. 1, and another port of the arc extinguishing channel 170 is communicated with the bottom gas outlet 180 of the back surface 113 of the housing 110, so that the arc extinguishing channel 170 from the movable contact 122 and the stationary contact 123 to the bottom of the housing 110 is established, so that after a large amount of arc extinguishing gas is generated in the arc extinguishing process after the arc enters the arc extinguishing channel 170, the arc extinguishing gas is guided by the arc extinguishing channel 170 to be exhausted through the bottom gas outlet 180 of the back surface 113 of the housing 110. When setting up arc extinguishing channel 170, can be so that arc extinguishing channel 170 has at least one and bends, from this, can increase arc extinguishing channel 170's length to utilize to bend and to make arc extinguishing channel 170 fully contact with the arc extinguishing gas, thereby improve arc extinguishing channel 170's cooling capacity, and then improve the security performance of circuit breaker. Meanwhile, the gas outlet of the arc extinguishing channel 170 is arranged at the bottom of the breaker shell 110, so that arc extinguishing gas can be exhausted from the bottom of the shell 110, the exhaust position is further away from the front 111 of the breaker shell 110, potential safety hazards caused by the arc extinguishing gas to the user side of the front 111 of the breaker shell 110 are avoided, and the safety performance of the breaker is effectively improved.

As shown in fig. 6 and 7, an arc barrier 125 may be further disposed on one side of the movable contact 122 where the arc is generated, the arc barrier 125 is riveted to the movable contact 122 through a riveting hole 127, an inner side of the arc barrier 125 is tightly attached to an outer surface of the rotating shaft 126 and moves along with the movable contact 122, so as to block a gap between the movable contact 122 and the rotating shaft 126, thereby effectively preventing the arc from entering the actuator 120, and protecting the actuator 120, and the ports of the arc barrier 125 and the arc extinguishing channel 170 are respectively located on two opposite sides of the arc generating area and are in direct correspondence with each other, thereby limiting the arc from entering the actuator 120 and simultaneously guiding the arc to enter the arc extinguishing channel 170. Furthermore, an arc runner 124 may be provided on the stationary contact 123, which extends toward the arc chute 170, so that the arc can also be guided by the arc runner 124 into the arc chute 170.

In addition, as shown in fig. 1 or 4, in order to improve the arc extinguishing capability of the circuit breaker, an arc extinguishing chamber may be correspondingly disposed at a port of the arc extinguishing channel 170 near the moving contact 122 and the stationary contact 123, and the arc entering the arc extinguishing channel 170 can be extinguished by the arc extinguishing chamber, in other words, after the arc enters the arc extinguishing chamber, the arc is cooled and divided by the arc extinguishing chamber, so as to accelerate the extinguishing of the arc, and in this process, a large amount of high-temperature and high-pressure arc extinguishing gas containing metal ions may be generated. The arc extinguishing chamber includes an arc extinguishing housing 161 and a plurality of grids 160 located in the arc extinguishing housing 161, and the grids 160 are spaced to form a plurality of passages, as shown in fig. 1 or fig. 4, so that the arcs can be separated and cooled by the grids 160, and the generated arc extinguishing gas is guided by the passages to continue to enter the arc extinguishing channel 170 during the arc extinguishing process.

As shown in fig. 1, the movable contact 122 and the fixed contact 123 of the actuator 120 are located in the middle of the housing 110, and the openings of the movable contact 122 and the fixed contact 123 in the opening position (the state shown in fig. 1) face the side surface 112 of the housing 110, so the arc extinguishing channel 170 may include a first channel 171 and a second channel 172 that are sequentially connected, wherein one port of the first channel 171 corresponds to the openings of the movable contact 122 and the fixed contact 123, another port of the first channel 171 extends toward the side surface 112 of the housing 110 and extends to the inner wall surface of the side wall of the housing 110, another port of the first channel 171 is connected to one port of the second channel 172, and another port of the second channel 172 extends toward the back surface 113 of the housing 110 and is connected to the air outlet 180 at the bottom of the housing 110. In this way, a bend 173 can be formed at the communication portion between the first passage 171 and the second passage 172.

Thus, as shown in dashed lines in fig. 1, the flow path of part of the quenching gas is shown, namely: after the arc is generated between the moving contact 122 and the fixed contact 123, the arc firstly enters the arc extinguishing chamber, and is cooled and divided by the grid 160 in the arc extinguishing chamber, so that the arc extinguishing is accelerated, and a large amount of arc extinguishing gas generated by the arc extinguishing chamber firstly flows along the first channel 171 towards the side surface 112 of the housing 110, then enters the second channel 172 after flowing to the side surface 112 of the housing 110, and is discharged towards the bottom air outlet 180 on the back surface 113 of the housing 110 under the guidance of the second channel 172. In the process, the arc extinguishing channel 170 is lengthened by bending, and the outward discharge speed of arc extinguishing gas can be properly delayed by using the bending, so that the cooling effect of the arc extinguishing gas is improved.

In order to further improve the arc extinguishing effect of the circuit breaker, as shown in fig. 1, a first flame-extinguishing expanded metal 130 may be further disposed in the arc-extinguishing channel 170, wherein the first flame-extinguishing expanded metal 130 is disposed along a radial cross section of the arc-extinguishing channel 170, so that when the arc-extinguishing gas flows along the arc-extinguishing channel 170, the arc-extinguishing gas is in full contact with the first flame-extinguishing expanded metal 130. Can carry out effectual cooling to the arc extinguishing gas through first flame metal mesh 130 that goes out, simultaneously, utilize first flame metal mesh 130 that goes out to also can carry out effective filtration to the metal ion in the arc extinguishing gas, reach and disappear free effect, from this, can effectively reduce the metal ion content of gas behind discharge casing 110, avoid causing the short circuit of peripheral circuit, burn out and the disaster that probably causes.

As shown in fig. 1, the first flame-quenching metal mesh 130 may be disposed in the second channel 172 at a position between the arc-extinguishing chamber and the bottom outlet 180.

As shown in fig. 2, the first flame-extinguishing wire 130 is shown, and the shape thereof may be determined according to the radial cross section of the arc-extinguishing channel 170, which is not limited in particular by the present application. Referring to fig. 2, the first flame-extinguishing metal mesh 130 includes a metal plate 131 and a through hole array disposed on the metal plate 131, the metal material can effectively improve the deionization effect of the first flame-extinguishing metal mesh 130, and meanwhile, the through hole array disposed on the metal plate 131 can ensure that the metal plate 131 has better cooling and filtering effects on the arc-extinguishing gas, so that the arc-extinguishing gas can still smoothly flow through the metal plate 131, thereby avoiding the problem of excessive internal pressure of the circuit breaker housing 110. It should be noted that, as shown in fig. 2, the via array refers to an array structure formed by a plurality of vias 132 uniformly distributed on the metal plate 131. Of course, in other embodiments, the plurality of through holes 132 distributed on the metal plate 131 may also be distributed in an irregular manner, which is not limited in this application.

In order to further enhance the cooling and deionization effect of the circuit breaker on the arc extinguishing gas, as shown in fig. 1, a second flame-extinguishing metal mesh 140 may be further disposed between the first flame-extinguishing metal mesh 130 and the bottom gas outlet 180, so that the arc extinguishing gas having passed through the first flame-extinguishing metal mesh 130 may be further cooled and deionization by the second flame-extinguishing metal mesh 140, thereby further reducing metal ions contained in the gas discharged out of the housing 110, achieving a zero-flashover effect when the circuit breaker exhausts gas, and further improving the breaking safety of the circuit breaker.

In some embodiments, as shown in fig. 1, the second flame-extinguishing expanded metal 140 may be disposed near the bottom gas outlet 180 of the housing 110, so that the arc-extinguishing gas can be cooled by the arc-extinguishing channel 170 and then acted on by the second flame-extinguishing expanded metal 140.

As shown in fig. 3, the second flame-extinguishing wire mesh 140 includes a plurality of layers of wire mesh (hereinafter referred to as first wire mesh 141 for the sake of distinction), wherein each layer of the first wire mesh 141 may be woven by a plurality of wires to form a mesh structure having mesh holes 142. The first wire mesh 141 of multilayer is range upon range of the setting along the gaseous flow direction of arc extinguishing to the mesh 142 staggered distribution of two-layer adjacent first wire mesh 141, from this, can form comparatively compact structure through the first wire mesh 141 of multilayer, have better gas tightness, from this, can carry out effectual cooling and filtration to the arc extinguishing gas through second flame-out wire mesh 140, realize the carminative zero flashover effect of circuit breaker.

As shown in fig. 4, in order to further improve the exhaust capacity of the circuit breaker and reduce the pressure inside the housing 110, a lateral air outlet 190 may be further disposed on the side surface 112 of the housing 110, and the lateral air outlet 190 is communicated with the first channel 171, so that the bottom air outlet 180 can be assisted to exhaust air through the lateral air outlet 190, thereby relieving the pressure inside the housing 110.

With continued reference to fig. 4, the third flame-extinguishing wire mesh 150 is disposed at the lateral gas outlet 190 of the housing 110, so that when the arc-extinguishing gas is exhausted from the arc-extinguishing channel 170 through the lateral gas outlet 190, the arc-extinguishing gas can be cooled and dissociated by the third flame-extinguishing wire mesh 150, and then the gas is exhausted. This reduces metal ions contained in the gas discharged from the case 110 through the side surface 112, thereby improving the safety of circuit breaker breaking.

Referring to fig. 5, the third flame-extinguishing wire mesh 150 includes at least one insulating plate 152 and at least one wire mesh (hereinafter referred to as a second wire mesh 154 for convenience of distinction) sequentially stacked along the gas outlet direction of the side gas outlet 190, and via hole arrays are distributed on the insulating plate 152, so that when the arc-extinguishing gas is discharged from the side gas outlet 190, the insulating plate 152 first has a good cooling and filtering effect on the arc-extinguishing gas, and meanwhile, the arc-extinguishing gas can still smoothly flow through the insulating plate 152, and then the second wire mesh 154 further cools and dissociates the arc-extinguishing gas passing through the insulating plate 152, thereby further reducing metal ions contained in the gas discharged out of the housing 110, and further improving the breaking safety of the circuit breaker. Note that, as shown in fig. 5, the via array refers to an array structure formed by a plurality of vias 153 uniformly distributed on the insulating plate 152.

As shown in fig. 5, the third flame-extinguishing wire mesh 150 includes a plurality of second wire meshes 154, wherein each second wire mesh 154 may be woven by a plurality of wires to form a mesh structure having mesh holes 155, the plurality of second wire meshes 154 are stacked in the flowing direction of the quenching gas, and the mesh holes 155 of two adjacent second wire meshes 154 are distributed in a staggered manner, so that a denser structure can be formed by the plurality of second wire meshes 154, and the quenching gas is better air-tight, and thus the quenching gas is effectively cooled and filtered.

In some embodiments, the gas outlet rate of the lateral gas outlet 190 is less than the gas outlet rate of the bottom gas outlet 180, so that the lateral gas outlet 190 only serves to relieve the internal pressure of the housing 110, and the bottom gas outlet 180 still serves as a main gas outlet, thereby balancing the internal pressure of the housing 110, reducing the gas outlet of the lateral gas outlet 190, and reducing the safety problem caused by a large amount of free metal ions in the discharged gas.

As shown in fig. 5, in order to improve the stability and convenience of the third flame-extinguishing wire mesh 150 disposed at the side of the air outlet 190 of the housing 110, a holder 151 may be further provided, and the insulating plate 152 and the second wire mesh 154 are fixed to the holder 151, and then the holder 151 is mounted to the housing 110.

Optionally, as shown in fig. 1, the length L of the second channel 172 is greater than or equal to one half of the maximum width W of the first channel 171, so that the length L of the second channel 172 is longer, the cooling capability of the arc extinguishing channel 170 can be effectively improved, and the safety performance of the circuit breaker is further improved.

Optionally, as shown in fig. 1, a distance D between the first flame-extinguishing metal mesh 130 and the second flame-extinguishing metal mesh 140 is greater than or equal to one half of the length L of the second channel 172, so that the distance D between the first flame-extinguishing metal mesh 130 and the second flame-extinguishing metal mesh 140 is relatively large, thereby effectively improving the cooling capacity of the arc-extinguishing channel 170, and further improving the safety performance of the circuit breaker.

In an embodiment, such as the circuit breaker shown in fig. 1 and 4, which includes a main body 210 and a bridge contact module 200 spliced to the bottom of the main body 210, a second sub-channel 1722 may be provided in the bridge contact module 200, and the second sub-channel 1722 belongs to the second channel 172, so that the second channel 172 may be formed by the first sub-channel 1721 located below the first channel 171 in the main body 210 and the second sub-channel 1722 in the bridge contact module 200, and thus, the arc extinguishing channel 170 may be further extended by the bridge contact module 200. The first flame-out metal mesh 130 and the second flame-out metal mesh 140 may be disposed in the second sub-channel 1722, and specifically, as shown in fig. 1 or fig. 4, the first flame-out metal mesh 130 is located at the top of the second sub-channel 1722, the second flame-out metal mesh 140 is located at the bottom of the second sub-channel 1722, and in this embodiment, the bottom air outlet 180 is located at the bottom of the bridge-type contact module 200. Of course, in other embodiments, it is also possible that the first flame-extinguishing wire mesh 130 is located in the first sub-channel 1721, and the second flame-extinguishing wire mesh 140 is located in the second sub-channel 1722; in addition, it is also possible that the first flame-out metal mesh 130 and the second flame-out metal mesh 140 are both located at the first sub-passage 1721.

In an embodiment, the circuit breaker shown in fig. 8 includes only the main body 210, in other words, the main body 210 shown in fig. 8 is obtained after removing the bridge-type contact module 200 based on the circuit breaker structure shown in fig. 1, in this embodiment, the second channel 172 includes only the first sub-channel 1721, and the first flame-extinguishing wire mesh 130 and the second flame-extinguishing wire mesh 140 may be both disposed in the first sub-channel 1721, specifically, as shown in fig. 8, the first flame-extinguishing wire mesh 130 may be located at the top of the first sub-channel 1721, and the second flame-extinguishing wire mesh 140 may be located at the bottom of the first sub-channel 1721, and in this embodiment, the bottom air outlet 180 is located at the bottom of the main body 210. In addition, the first flame-extinguishing wire mesh 130 or the second flame-extinguishing wire mesh 140 may be disposed only in the first sub-passage 1721, which is not specifically limited in the present application.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (12)

1. The circuit breaker is characterized by comprising a shell (110) and an actuating mechanism (120) arranged on the shell (110), wherein the actuating mechanism (120) is provided with an operating end (121) positioned on the front surface (111) of the shell (110), an arc extinguishing channel (170) is arranged in the shell (110), one port of the arc extinguishing channel (170) corresponds to the actuating mechanism (120), the other port of the arc extinguishing channel (170) extends to the back surface (113) of the shell (110) and is communicated with a bottom air outlet (180) of the back surface (113) of the shell (110), and the arc extinguishing channel (170) is provided with at least one bend.

2. The circuit breaker according to claim 1, wherein the arc extinguishing channel (170) comprises a first channel (171) and a second channel (172), the first channel (171) corresponds to the actuator (120), the first channel (171) extends toward the side surface (112) of the housing (110) and communicates with the second channel (172), and the second channel (172) communicates with the bottom air outlet (180) of the rear surface (113) of the housing (110).

3. The circuit breaker according to claim 1 or 2, characterized in that a first flame-extinguishing expanded metal (130) is arranged in the arc chute (170) along a radial section of the arc chute (170).

4. The circuit breaker according to claim 3, characterized in that said first flame-out metal mesh (130) comprises a metal plate (131) and an array of through holes distributed on said metal plate (131).

5. A circuit breaker according to claim 3, characterized in that a second flame-extinguishing expanded metal (140) is arranged in the arc chute (170) along a radial section of the arc chute (170), the second flame-extinguishing expanded metal (140) being located between the first flame-extinguishing expanded metal (130) and the bottom gas outlet (180).

6. The circuit breaker according to claim 5, characterized in that said second flame-extinguishing wire mesh (140) comprises a plurality of layers of wire mesh arranged one above the other in the axial direction of said quenching channel (170), the meshes (142) of two adjacent layers of said wire mesh being staggered.

7. The circuit breaker according to claim 2, characterized in that a lateral air outlet (190) is further provided at the side (112) of the housing (110), the first channel (171) communicates with the lateral air outlet (190), and a third flame quenching expanded metal (150) is provided at the lateral air outlet (190) of the housing (110).

8. The circuit breaker according to claim 7, wherein said third flame-out metal mesh (150) comprises at least one layer of insulating plate (152) and at least one layer of wire mesh sequentially stacked along the gas outlet direction of said lateral gas outlet (190), and a via array is distributed on said insulating plate (152).

9. The circuit breaker according to claim 8, characterized in that said third flame-out wire mesh (150) comprises a plurality of layers of said wire mesh, the meshes (155) of two adjacent layers of said wire mesh being staggered.

10. The circuit breaker of claim 7 wherein the gas exit rate of the lateral gas exit (190) is less than the gas exit rate of the bottom gas exit (180).

11. The circuit breaker according to claim 2, wherein the length of the second channel (172) is equal to or greater than one-half of the maximum width of the first channel (171).

12. The circuit breaker according to claim 5, characterized in that when the arc extinguishing channel (170) comprises a first channel (171) and a second channel (172), the first flame suppressing expanded metal (130) is spaced apart from the second flame suppressing expanded metal (140) by a distance equal to or greater than one-half of the length of the second channel (172).

Images