CN115172117A

CN115172117A - Automatic partition type arc extinguishing shell for circuit breaker

Info

Publication number: CN115172117A
Application number: CN202210865044.5A
Authority: CN
Inventors: 刘君; 刘婷
Original assignee: People's Electric Appliance Group Shandong Zaokuang Intelligent Manufacturing Co ltd
Current assignee: People's Electric Appliance Group Shandong Zaokuang Intelligent Manufacturing Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-10-11

Abstract

The invention discloses an automatic isolating arc extinguishing shell for a circuit breaker, which relates to the technical field of electrical equipment, and comprises an arc extinguishing chamber, wherein the arc extinguishing chamber comprises: the three groups of substrates form a concave arc isolation cover, an isolation cavity with an open top is formed in the arc isolation cover, and a first arc extinguishing member is assembled on the inner wall of the isolation cavity; the first arc extinguishing member includes: and the first arc extinguishing grid plates are distributed in an equidistant array along the width direction of the isolation cavity. According to the invention, through the cooperation among the arc extinguishing chamber, the first arc extinguishing member and the second arc extinguishing member, after an electric arc is generated when the contact of the circuit breaker is disconnected and closed, the electric arc is subjected to multi-group shunting through the first arc extinguishing member and the second arc extinguishing member, and is separated again after being separated into short arcs through the longitudinal and transverse two groups of arc extinguishing directions, so that the rapid and convenient arc extinguishing treatment of the electric arc by the device main body is effectively accelerated.

Description

Automatic partition type arc extinguishing shell for circuit breaker

Technical Field

The invention relates to the technical field of electrical equipment, in particular to an automatic isolating arc extinguishing shell for a circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying and opening/closing a current under a normal circuit condition and closing, carrying and opening/closing a current under an abnormal circuit condition within a predetermined time, and is divided into a high-voltage circuit breaker and a low-voltage circuit breaker according to the use range thereof, and the high-voltage and low-voltage boundary line is divided more clearly, and generally, a circuit breaker of 3kV or more is called a high-voltage electrical apparatus.

The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, has the function equivalent to the combination of a fuse type switch, an over-under-heat relay and the like, does not need to change parts after breaking fault current, and has been widely applied.

When the contact of the circuit breaker is opened and closed, the arc is generated due to gas discharge, which not only greatly damages the contact of the circuit breaker, but also prolongs the time for breaking the circuit, so that the structure and the arc extinguishing performance of the arc extinguishing chamber of the circuit breaker become key problems for realizing the volume miniaturization and the electric performance of the circuit breaker.

Disclosure of Invention

The invention aims to provide an automatic isolating type arc extinguishing shell for a circuit breaker, which solves the problem that the arc extinguishing performance of the arc extinguishing shell to electric arcs is poor in the background technology.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides an automatic isolating arc extinguishing shell for a circuit breaker, which comprises an arc extinguishing chamber, wherein the arc extinguishing chamber comprises: the three groups of substrates form a concave arc isolation cover, an isolation cavity with an open top is formed in the arc isolation cover, and a first arc extinguishing member is assembled on the inner wall of the isolation cavity;

the first arc extinguishing member includes: the first arc-extinguishing grid plates are distributed in an equidistance array along the width direction of the isolation cavity, the first arc-extinguishing grid plates are arranged at the bottom end of the isolation cavity and extend along the height direction of the isolation cavity, the second arc-extinguishing grid plates are assembled at the top ends of the first arc-extinguishing grid plates and extend from the inner part of the isolation cavity to the outer part of the isolation cavity, the third arc-extinguishing grid plates are assembled at the bottom ends of the parts of the second arc-extinguishing grid plates extending to the outer part of the isolation cavity, the arc-isolating cover is positioned between the third arc-extinguishing grid plates and the first arc-extinguishing grid plates, and the third arc-extinguishing grid plates, the first arc-extinguishing grid plates and the second arc-extinguishing grid plates are all arranged in parallel;

a plane which passes through the center of the length direction of the top surface of the arc-isolating cover and is vertical to the top end is taken as a set plane, the third arc-extinguishing grid plates are symmetrically provided with another group of third arc-extinguishing grid plates along the set plane, and second arc-extinguishing members are respectively assembled between the two groups of third arc-extinguishing grid plates and the inner wall of the arc-isolating cover;

the second arc extinguishing member includes: the fourth arc-extinguishing grid plate is assembled on the inner wall of the arc-isolating cover in a sliding mode, a connecting block is fixedly assembled on one side, close to the arc-isolating cover, of the fourth arc-extinguishing grid plate, the connecting block extends into the isolating cavity and is connected with the output end of a power component inside the isolating cavity, and a fifth arc-extinguishing grid plate is assembled right below the fourth arc-extinguishing grid plate;

and one sides of the fourth arc-extinguishing grid plate and the fifth arc-extinguishing grid plate, which are far away from the inner wall of the arc-isolating cover, are attached to the third arc-extinguishing grid plate.

Preferably, the arc extinguishing chamber further comprises: set up in the first radiating groove of arc shield both sides outer wall, be used for assembling the locating hole on the circuit breaker with the arc shield to and set up in the second radiating groove that the arc shield is close to circuit breaker one end.

Preferably, the first arc extinguishing member further includes: the support frame is assembled at the bottom end of the third arc-extinguishing grid plate, one end of the support frame, which is close to the arc-isolating cover, is fixedly assembled with the inner wall of the arc-isolating cover, the arc-extinguishing cover is assembled at the top end of the second arc-extinguishing grid plate, and a heat-radiating cavity is formed in the arc-extinguishing cover.

Preferably, the second arc extinguishing member further includes: and one end of the fifth arc-extinguishing grid plate, which is close to the arc-isolating cover, is provided with an isolating plate, and one side of the fifth arc-extinguishing grid plate, which is close to the arc-isolating cover, is provided with a fixing block.

Preferably, the power component comprises: the push rod of fourth arc extinguishing grid tray one side is kept away from in the connecting block to the assembly, the one end of push rod is equipped with the travelling arm, the one end that the travelling arm kept away from the push rod is equipped with the poor metal disc of electric conductive property, the one end that the metal disc is close to the travelling arm is equipped with the piston board, the outer wall assembly piston sleeve of piston board, the one end that the piston sleeve is close to the push rod is seted up and is run through to its inside exhaust hole.

Preferably, the inclination angle of the fifth arc-extinguishing grid plate is the same as that of the fourth arc-extinguishing grid plate, the thickness and width of the fifth arc-extinguishing grid plate are the same as those of the fourth arc-extinguishing grid plate, and the interval between the end part of the fourth arc-extinguishing grid plate and the end part of the inner wall of the arc-isolating cover is equal to the length of the fifth arc-extinguishing grid plate.

Preferably, one side of the fourth arc-extinguishing grid plate far away from the arc-isolating cover is provided with a bearing groove, and one side of the third arc-extinguishing grid plate close to the fourth arc-extinguishing grid plate is provided with a bearing pulley matched with the bearing groove.

Preferably, first radiating groove and second radiating groove run through to keeping apart intracavity portion from the outer wall that separates the arc cover, just first radiating groove and second radiating groove are located to separate the equidistant permutation of arc cover outer wall and distribute.

Preferably, the air inlet of the heat dissipation cavity is arranged right above the contact position of the support frame and the arc isolation cover, and the air outlet of the heat dissipation cavity is arranged in the isolation cavity.

Preferably, both sides of the inner wall of the arc-isolating cover are provided with positioning grooves matched with the fixing blocks, both sides of the inner wall of the arc-isolating cover are provided with limiting sliding grooves matched with the connecting blocks, and the length of each limiting sliding groove is twice that of each positioning groove; the fourth arc-extinguishing grid plate is integrally arranged in an inclined mode.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, through the cooperation among the arc extinguishing chamber, the first arc extinguishing member and the second arc extinguishing member, after an electric arc is generated when a contact of the circuit breaker is broken and closed, the electric arc is subjected to multi-group shunting through the first arc extinguishing member and the second arc extinguishing member, and is separated again after being separated into short arcs through the longitudinal arc extinguishing direction and the transverse arc extinguishing direction, so that the rapid and convenient arc extinguishing treatment of the electric arc by the device main body is effectively accelerated.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of an arc chute of the present invention;

FIG. 3 is a rear view of the present invention;

FIG. 4 is a schematic diagram of the position relationship between the arc extinguishing chamber and the second arc extinguishing member according to the present invention;

FIG. 5 is a schematic structural diagram of an arc-extinguishing chamber of the present invention;

FIG. 6 is a schematic view of a first arc extinguishing member according to the present invention;

FIG. 7 is a schematic view of the first and second arc extinguishing members of the present invention;

FIG. 8 is a schematic structural view of a second arc extinguishing member according to the present invention;

FIG. 9 is a schematic view of the structure of an isolation chamber of the present invention;

FIG. 10 is an enlarged view of a portion a of FIG. 9;

fig. 11 is a schematic structural diagram of a conventional circuit breaker and arc chute.

In the figure:

100. an arc extinguishing chamber; 200. a first arc extinguishing member; 300. a second arc extinguishing member; 400. a circuit breaker; 500. a traditional arc extinguishing chamber;

110. an arc-isolating shield; 120. an isolation chamber; 130. a first heat sink; 140. a second heat sink;

210. a first arc chute; 220. an arc chute; 230. a second arc chute; 240. a third arc chute; 250. a support frame; 260. an air inlet; 270. a heat dissipation cavity; 280. an air outlet;

310. a fourth arc chute; 320. connecting blocks; 330. a power component; 340. an insulating plate; 350. a fifth arc chute; 360. a fixed block;

331. a push rod; 332. a moving arm; 333. a metal disc; 334. a piston sleeve.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, 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 only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "coupled" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

Referring to fig. 1 to 11, the present invention provides an automatic isolating arc-extinguishing housing for a circuit breaker, including an arc-extinguishing chamber 100, wherein the arc-extinguishing chamber 100 includes: the three groups of substrates form a concave arc isolating cover 110, an isolating cavity 120 with an open top is formed in the arc isolating cover 110, and a first arc extinguishing member 200 is assembled on the inner wall of the isolating cavity 120;

the empty space between the arc-isolating cover 110 and the short circuit is partially reserved by the isolation cavity 120, so that the temperature generated by arc extinction in the arc-isolating cover 110 cannot directly act on the circuit breaker 400, the consumption of raw materials during the manufacturing of the arc-isolating cover 110 can be reduced, the bearing capacity of the arc-isolating cover 110 is not affected, and the arc-isolating cover has favorable effects on heat dissipation and heat conduction;

the first arc extinguishing member 200 includes: the first arc-extinguishing grids 210 are arranged in an equidistant array along the width direction of the isolation cavity 120, the first arc-extinguishing grids 210 are arranged at the bottom end of the isolation cavity 120 and extend along the height direction of the isolation cavity 120, the second arc-extinguishing grids 230 are assembled at the top end of the first arc-extinguishing grids 210, the second arc-extinguishing grids 230 extend from the inside of the isolation cavity 120 to the outside of the isolation cavity 120, the third arc-extinguishing grids 240 are assembled at the bottom ends of the parts, extending to the outside of the isolation cavity 120, of the second arc-extinguishing grids 230, the arc-extinguishing cover 110 is positioned between the third arc-extinguishing grids 240 and the first arc-extinguishing grids 210, and the three arc-extinguishing grids are all arranged in parallel;

when the contact of the circuit breaker is broken and closed, an arc is generated due to gas discharge, when the arc contacts the first arc-extinguishing member 200, firstly, the arc contacts the arc by the third arc-extinguishing grid plates 240, after the arc is received by the third arc-extinguishing grid plates 240, as the arc contacts are distributed in the same plane in an aligned manner, and the third arc-extinguishing grid plates 240 are provided with another group of third arc-extinguishing grid plates 240 according to a set plane, the arc is divided into a plurality of groups of short arcs by the third arc-extinguishing grid plates 240 which are symmetrically distributed, and the arc cannot be maintained for a long time along with the increase of the distance, so that the arc is extinguished;

however, when the arc moves to the top end of the third arc chute 240 but is not extinguished yet, the arc moves toward the second arc chute 230 along with the top end of the third arc chute 240, and because one second arc chute 230 is disposed at the top end of each third arc chute 240, the arc still moves along the extending direction of the second arc chute 230 in the form of a plurality of groups of short arcs, and the arc is continuously extinguished by the second arc chute 230;

a plane which passes through the center of the length direction of the top surface of the arc-isolating cover 110 and is vertical to the top end is taken as a set plane, the third arc-extinguishing grid plates 240 are symmetrically provided with another group of third arc-extinguishing grid plates 240 along the set plane, and second arc-extinguishing members 300 are respectively arranged between the two groups of third arc-extinguishing grid plates 240 and the inner wall of the arc-isolating cover 110;

so that the arc generated can be divided into two groups, which are respectively conducted to two groups of third arc chute plates 240 on both sides of the set plane, and then the arc is divided again, part of the arc moves along the extending direction of the third arc chute plates 240, but part of the arc moves into the second arc extinguishing member 300 after passing through the third arc chute plates 240, and the arc of the part of the arc entering the second arc extinguishing member 300 is extinguished by the second arc extinguishing member 300;

the second arc extinguishing member 300 includes: the fourth arc chute 310 is slidably assembled on the inner wall of the arc-isolating cover 110, a connecting block 320 is fixedly assembled on one side of the fourth arc chute 310 close to the arc-isolating cover 110, the connecting block 320 extends into the isolating cavity 120 and is connected with the output end of the power component 330 in the isolating cavity 120, and a fifth arc chute 350 is assembled right below the fourth arc chute 310;

the fourth arc chute 310 and the fifth arc chute 350 are attached to the third arc chute 240 at the sides far away from the inner wall of the arc-isolating cover 110;

so that when the arc enters the second arc extinguishing member 300, the arc is divided into a plurality of groups of short arcs by the fourth arc chute 310 and the fifth arc chute 350, after the fourth arc chute 310 contacts the arc, the power component 330 is started, so that the output end of the power component 330 drives the fourth arc chute 310 to move through the connecting block 320, when the fourth arc chute 310 moves to be attached to the inner wall of the arc-isolating cover 110, the fourth arc chute 310 stops moving, so that the fourth arc chute 310 and the fifth arc chute 350 are dislocated, and the arc between the fourth arc chute 310 and the fifth arc chute 350 is extinguished after the dislocation;

meanwhile, the gap between two groups of fourth arc chute plates 310 is increased, and the gap between two groups of adjacent fifth arc chute plates 350 is increased, so that the fourth arc chute plates 310 and the fifth arc chute plates 350 are cooled better, the next work is carried out better, the loss of the fourth arc chute plates 310 and the fifth arc chute plates 350 is reduced, and the service life of the arc chute plates is prolonged;

foretell structural design is convenient for after the electric arc produced, carries out the multicomponent through first arc extinguishing member 200 and second arc extinguishing member 300 to electric arc, through vertical and horizontal two sets of arc extinguishing directions for electric arc is after being cut off into the short arc, is cut off once more, has effectively accelerated the device main part and has carried out quick arc extinguishing to the electric arc that circuit breaker 400 contact produced when breaking absolutely and closing.

Referring to fig. 2 to 5, the arc chute 100 further includes: the first heat dissipation grooves 130 are formed in the outer walls of the two sides of the arc-isolating cover 110, the positioning hole is used for assembling the arc-isolating cover 110 on the circuit breaker 400, and the second heat dissipation grooves 140 are formed in one end, close to the circuit breaker 400, of the arc-isolating cover 110;

so that the heat inside the segregation chamber 120 is discharged through the first heat dissipation groove 130 and the second heat dissipation groove 140;

the first heat dissipation grooves 130 and the second heat dissipation grooves 140 penetrate from the outer wall of the arc-isolating cover 110 to the inside of the isolation cavity 120, and the first heat dissipation grooves 130 and the second heat dissipation grooves 140 are arranged on the outer wall of the arc-isolating cover 110 in an equidistant and aligned manner;

the above-mentioned structural design is convenient for when the staff must assemble the device main body at the circuit breaker 400, only need through the locating hole assembly on the circuit breaker 400 to make the second heat sink 140 can aim at the heat dissipation frame of circuit breaker 400, thereby discharge the inside heat of isolation chamber 120 through second heat sink 140.

Referring to fig. 6, 7 and 9, the first arc extinguishing device 200 further includes: the support frame 250 is assembled at the bottom end of the third arc-extinguishing grid 240, one end of the support frame 250 close to the arc-isolating shield 110 is fixedly assembled with the inner wall of the arc-isolating shield 110, the arc-extinguishing shield 220 is assembled at the top end of the second arc-extinguishing grid 230, and a heat-radiating cavity 270 is formed inside the arc-extinguishing shield 220;

high temperature generated by arc extinguishing in the arc extinguishing chamber 220 can flow up to the inside of the heat dissipation chamber 270, and meanwhile, heat can be generated when the second arc extinguishing grid 230 is used for arc extinguishing, and the generated heat is transmitted to the inside of the arc extinguishing chamber 220, namely the inside of the heat dissipation chamber 270, through the second arc extinguishing grid 230;

the air inlet 260 of the heat dissipation cavity 270 is arranged right above the contact position of the support frame 250 and the arc-isolating cover 110, and the air outlet 280 of the heat dissipation cavity is arranged inside the isolation cavity 120;

the above-mentioned structural design is convenient for the inside high temperature of arc-extinguishing chamber 220 to get into inside the heat dissipation chamber 270 through air inlet 260, then discharges to inside keeping apart the chamber 120 through gas outlet 280, then discharges the device main part through second radiating groove 140, and the design in heat dissipation chamber 270 has both practiced thrift the material, and moreover for traditional solid material, its radiating effect is better.

Referring to fig. 8 to 10, the second arc extinguishing member 300 further includes: the end of the fifth arc-extinguishing grid 350 close to the arc-isolating cover 110 is provided with an isolating plate 340, and one side of the fifth arc-extinguishing grid 350 close to the arc-isolating cover 110 is provided with a fixing block 360;

positioning grooves matched with the fixing blocks 360 are formed in two sides of the inner wall of the arc-isolating cover 110, limiting sliding grooves matched with the connecting blocks 320 are formed in two sides of the inner wall of the arc-isolating cover 110, and the length of each limiting sliding groove is twice that of each positioning groove; the fourth arc-extinguishing grid 310 is arranged obliquely as a whole;

the above-mentioned structural design is convenient for after the power component 330 drives the fourth arc chute 310 to move, form the dislocation between the fourth arc chute 310 and the fifth arc chute 350, and after the electric arc between the fourth arc chute 310 and the fifth arc chute 350 is isolated by the isolation plate 340, change into the clearance between two sets of adjacent fifth arc chute 350 by the clearance between the fourth arc chute 310 and the fifth arc chute 350, the volume of electric arc is unchangeable, but the interval grow, thereby make electric arc unable exist for a long time, the dissipation of electric arc has been accelerated.

Referring to fig. 9 and 10, the power unit 330 includes: the push rod 331 is assembled on one side, away from the fourth arc-extinguishing grid 310, of the connecting block 320, a moving arm 332 is assembled at one end of the push rod 331, a metal disc 333 with poor conductivity is assembled at one end, away from the push rod 331, of the moving arm 332, a piston plate is assembled at one end, close to the moving arm 332, of the metal disc 333, a piston sleeve 334 is assembled on the outer wall of the piston plate, and an exhaust hole penetrating into the piston sleeve 334 is formed at one end, close to the push rod 331, of the piston sleeve 334;

an end of the piston sleeve 334 remote from the moving arm 332 and the piston plate are filled with an expandable gas (in this embodiment, the expandable gas may be air, and virtually all non-toxic and expandable gases may be used as the expandable gas in this embodiment);

foretell structural design is convenient for conduct through the heat that produces in carrying out the arc extinguishing processing procedure to electric arc to turning into power, to still can accelerating the arc extinguishing processing to electric arc when consuming the heat, also accelerated the cooling rate of arc extinguishing equipment, so that the next operation of arc extinguishing equipment, concrete operation is as follows:

since the generation of the arc is usually accompanied by the occurrence of high temperature, when the arc moves to contact with the fourth arc chute 310, a higher temperature is generated on the outer wall of the fourth arc chute 310, and the heat on the outer wall of the fourth arc chute 310 is transmitted to the push rod 331 through the connecting block 320, and then transmitted to the metal plate 333 through the push rod 331 and the moving arm 332;

since the metal plate 333 is heated to heat the expandable gas inside the piston sleeve 334, the expandable gas expands to press the piston plate, and the piston plate generates displacement in return, thereby driving the moving arm 332 to displace, and the moving arm 332 displaces to drive the push rod 331 to move, thereby driving the fourth arc chute 310 to move through the connecting block 320, thereby achieving the effect of the dislocation of the fourth arc chute 310 and the fifth arc chute 350.

Please refer to fig. 2 to 10, the inclination angle of the fifth louver 350 is the same as the inclination angle of the fourth louver 310, the thickness and width of the fifth louver 350 are the same as the thickness and width of the fourth louver 310, and the interval between the end of the fourth louver 310 and the end of the inner wall of the arc-isolating cover 110 is equal to the length of the fifth louver 350;

when the two sets of fourth arc chute plates 310 are displaced to contact with the arc-extinguishing chamber 110, a chamber with only one side open is formed between the two sets of fourth arc chute plates 310, so that heat inside the two sets of fourth arc chute plates 310 can enter the interior of the arc-extinguishing chamber 220 through the open while arc is extinguished, and can be subsequently discharged out of the main body of the device through the heat dissipation chamber 270;

a bearing groove is formed in one side, away from the arc-isolating cover 110, of the fourth arc-extinguishing grid 310, and a bearing pulley matched with the bearing groove is assembled on one side, close to the fourth arc-extinguishing grid 310, of the third arc-extinguishing grid 240;

the above-mentioned structure is designed to facilitate the fourth arc chute 310 to reduce the friction force during the displacement process through the bearing pulley and the bearing groove, so as to better utilize the kinetic energy generated by the power component 330.

While the invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made, and it is intended to cover: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. The utility model provides an automatic wall formula arc extinguishing casing for circuit breaker which characterized in that: comprising an arc chute (100), said arc chute (100) comprising: the arc separation cover (110) is formed by three groups of substrates in a closed-loop manner, an isolation cavity (120) with an open top is formed in the arc separation cover (110), and a first arc extinguishing member (200) is assembled on the inner wall of the isolation cavity (120);

the first arc extinguishing member (200) includes: the first arc-extinguishing grid plates (210) are distributed in an equidistant array along the width direction of the isolation cavity (120), the first arc-extinguishing grid plates (210) are matched with the bottom end of the isolation cavity (120) and extend along the height direction of the isolation cavity (120), the top end of the first arc-extinguishing grid plates (210) is provided with second arc-extinguishing grid plates (230), the second arc-extinguishing grid plates (230) extend to the outside of the isolation cavity (120) from the inside of the isolation cavity (120), the bottom end of the part, extending to the outside of the isolation cavity (120), of the second arc-extinguishing grid plates (230) is provided with third arc-extinguishing grid plates (240), the arc-isolating cover (110) is positioned between the third arc-extinguishing grid plates (240) and the first arc-extinguishing grid plates (210), and the three arc-extinguishing grid plates are arranged in parallel;

a plane which passes through the center of the length direction of the top surface of the arc-isolating cover (110) and is vertical to the top end is taken as a set plane, the third arc-extinguishing grid plates (240) are symmetrically provided with another group of third arc-extinguishing grid plates (240) along the set plane, and second arc-extinguishing members (300) are respectively arranged between the two groups of third arc-extinguishing grid plates (240) and the inner wall of the arc-isolating cover (110);

the second arc extinguishing member (300) includes: the fourth arc-extinguishing grid plate (310) is assembled on the inner wall of the arc-isolating cover (110) in a sliding mode, a connecting block (320) is fixedly assembled on one side, close to the arc-isolating cover (110), of the fourth arc-extinguishing grid plate (310), the connecting block (320) extends into the isolating cavity (120) and is connected with the output end of a power component (330) in the isolating cavity (120), and a fifth arc-extinguishing grid plate (350) is assembled under the fourth arc-extinguishing grid plate (310);

the fourth arc-extinguishing grid plate (310) and the fifth arc-extinguishing grid plate (350) are attached to the third arc-extinguishing grid plate (240) on the side far away from the inner wall of the arc-isolating cover (110).

2. The self-closing arc chute housing for a circuit breaker of claim 1 wherein: the arc chute (100) further comprises: the circuit breaker comprises a first heat dissipation groove (130) arranged on the outer walls of two sides of the arc-isolating cover (110), a positioning hole used for assembling the arc-isolating cover (110) on the circuit breaker (400), and a second heat dissipation groove (140) arranged at one end, close to the circuit breaker (400), of the arc-isolating cover (110).

3. The self-closing arc chute housing for a circuit breaker of claim 1 wherein: the first arc quenching member (200) further comprises: the support frame (250) of assembly in third arc extinguishing grid (240) bottom, the one end that support frame (250) is close to arc insulating cover (110) is with the inner wall fixed assembly of arc insulating cover (110), the top of second arc extinguishing grid (230) is equipped with arc extinguishing cover (220), heat dissipation chamber (270) have been seted up to the inside of arc extinguishing cover (220).

4. The self-closing arc chute housing for a circuit breaker of claim 1 wherein: the second arc quenching member (300) further comprises: and an insulating plate (340) is assembled at one end, close to the arc-isolating cover (110), of the fifth arc-extinguishing grid plate (350), and a fixing block (360) is assembled at one side, close to the arc-isolating cover (110), of the fifth arc-extinguishing grid plate (350).

5. The self-closing arc chute housing for a circuit breaker of claim 1 wherein: the power unit (330) includes: assemble in push rod (331) of connecting block (320) and keep away from fourth arc extinguishing grid plate (310) one side, the one end of push rod (331) is equipped with moving arm (332), the one end that moving arm (332) kept away from push rod (331) is equipped with metal disc (333) that electric conductive performance is poor, the one end that metal disc (333) are close to moving arm (332) is equipped with the piston board, the outer wall assembly piston cover (334) of piston board, the one end that piston cover (334) are close to push rod (331) has been seted up and has been run through to its inside exhaust hole.

6. The self-closing arc chute housing for a circuit breaker of claim 1 wherein: the inclination angle of the fifth arc chute plate (350) is the same as that of the fourth arc chute plate (310), the thickness and width of the fifth arc chute plate (350) are the same as those of the fourth arc chute plate (310), and the interval between the end part of the fourth arc chute plate (310) and the end part of the inner wall of the arc isolating cover (110) is equal to the length of the fifth arc chute plate (350).

7. The self-closing arc chute housing of claim 1 wherein: a bearing groove is formed in one side, far away from the arc-isolating cover (110), of the fourth arc-extinguishing grid plate (310), and a bearing pulley matched with the bearing groove is assembled on one side, close to the fourth arc-extinguishing grid plate (310), of the third arc-extinguishing grid plate (240).

8. The self-closing arc chute housing of claim 2 wherein: the first heat dissipation groove (130) and the second heat dissipation groove (140) penetrate through the outer wall of the arc isolation cover (110) to the inside of the isolation cavity (120), and the first heat dissipation groove (130) and the second heat dissipation groove (140) are located on the outer wall of the arc isolation cover (110) in an equidistant and aligned distribution mode.

9. The self-closing arc chute housing of claim 3 wherein: the air inlet (260) of the heat dissipation cavity (270) is arranged right above the contact position of the support frame (250) and the arc isolation cover (110), and the air outlet (280) of the heat dissipation cavity is arranged in the isolation cavity (120).

10. The self-closing arc chute housing of claim 4 wherein: positioning grooves matched with the fixing blocks (360) are formed in two sides of the inner wall of the arc isolation cover (110), limiting sliding grooves matched with the connecting blocks (320) are formed in two sides of the inner wall of the arc isolation cover (110), and the length of each limiting sliding groove is twice that of each positioning groove; the whole fourth arc-extinguishing grid plate (310) is obliquely arranged.