CN217641190U

CN217641190U - Arc extinguish chamber structure and circuit breaker

Info

Publication number: CN217641190U
Application number: CN202221732093.3U
Authority: CN
Inventors: 寻春; 张建奇; 熊丽
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2022-10-21
Anticipated expiration: 2032-07-06

Abstract

The utility model discloses an explosion chamber structure and circuit breaker. The arc extinguish chamber structure comprises an arc extinguish chamber frame, wherein the arc extinguish chamber frame comprises a first side plate, a second side plate and a base, the first side plate and the second side plate are oppositely arranged at two ends of the base, and an arc extinguish chamber space is formed among the base, the first side plate and the second side plate; the arc extinguishing grid plate assembly is arranged in the arc extinguishing chamber space and comprises a long grid plate group and a short grid plate group, the short grid plate group comprises a plurality of short grid plates, the long grid plate group comprises a plurality of long grid plates, and the distance between every two adjacent short grid plates is larger than that between every two adjacent long grid plates; the arc striking piece is arranged in the arc extinguishing chamber space and comprises an arc striking piece body and an arc guiding piece used for guiding electric arcs, the arc striking piece body is arranged on one side of the short grid piece group, which deviates from the long grid piece group, and the arc striking piece body is provided with a through hole.

Description

Arc extinguish chamber structure and circuit breaker

Technical Field

The utility model relates to an explosion chamber technical field especially relates to an explosion chamber structure and circuit breaker.

Background

The breaker is an important part of the power distribution apparatus, is mainly used for various low-voltage power systems, and is used for connecting and disconnecting the current in the power grid circuit and protecting the circuit and power supply equipment from the damage of faults such as overload, undervoltage, short circuit, single-phase grounding and the like. When fault current occurs, the circuit breaker controller enables the tripper to drive the mechanism to act by giving a command to the tripper, and the mechanism drives the contact to be disconnected; the contact can produce electric arc after the disconnection, and electric arc gets into the explosion chamber under the effect of magnetic field and fluid, and the explosion chamber relies on the multi-disc arc extinguishing bars piece to cut apart into the multistage short arc with electric arc, improves electric arc voltage to extinguish electric arc fast, guarantee circuit breaker's normal use.

In carbon and under the background, the photovoltaic industry and the new energy industry are rapidly developed, the wide application of high-power components, the design of a photovoltaic system and a new energy system are gradually complicated, and the application scenes are diversified, so that the safety problem of a power station is increasingly highlighted.

The arc extinguishing capability of most existing arc extinguishing chamber structures can only meet 380V, 440V and 690V alternating voltage breaking, and cannot meet voltage breaking of over 1000V alternating current and direct voltage breaking, so that the circuit breaker is poor in adaptability and low in universality.

Therefore, how to design and improve the universality of the circuit breaker is a technical problem which needs to be solved by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims to provide an explosion chamber structure to improve the commonality of circuit breaker.

In order to achieve the above object, the present invention provides the following technical solutions:

the arc extinguish chamber frame comprises a first side plate, a second side plate and a base, wherein the first side plate and the second side plate are oppositely arranged at two ends of the base, and an arc extinguish chamber space is formed among the base, the first side plate and the second side plate;

the arc extinguishing grid plate assembly is arranged in the arc extinguishing chamber space and comprises a long grid plate group and a short grid plate group, the short grid plate group comprises a plurality of short grid plates, the long grid plate group comprises a plurality of long grid plates, and the distance between every two adjacent short grid plates is larger than the distance between every two adjacent long grid plates;

the arc striking piece is arranged in the arc extinguishing chamber space and comprises an arc striking piece body and an arc guiding piece used for guiding electric arcs, the arc striking piece body is arranged on one side, deviating from the long grid piece group, of the short grid piece group, and the arc striking piece body is provided with a through hole.

Optionally, in the arc extinguish chamber structure, the thickness of the short grid plate is smaller than that of the long grid plate.

Optionally, in above-mentioned explosion chamber structure, still include the flame subassembly of putting out, be equipped with the installation cavity on the base, the flame subassembly of putting out set up in the installation cavity, the flame subassembly of putting out includes a slice flame piece of putting out at least, and every the flame piece of putting out all is equipped with a plurality of dashpots.

Optionally, in the arc extinguishing chamber structure, an arc runner is disposed on a side of the base close to the arc chute plate assembly, the arc runner is located at the bottom of the mounting cavity, the arc runner aligns with a grid plate gap of the arc chute plate assembly, and a buffer hole on a flame quenching plate adjacent to the base and an arc runner on the base, as well as adjacent buffer holes on the flame quenching plate, are all arranged in a staggered manner.

Optionally, in the above arc extinguish chamber structure, the flame extinguishing assembly further includes a metal hole plate disposed on one side of the flame extinguishing sheet away from the arc extinguishing grid sheet assembly, and a metal mesh set disposed on one side of the metal hole plate away from the flame extinguishing assembly.

Optionally, in above-mentioned explosion chamber structure, the metal mesh group includes the multilayer metal mesh, the multilayer the metal mesh is arranged in proper order along first direction and is set up, and the multilayer the mesh number of metal mesh reduces in proper order along first direction, first direction is certainly go out the flame subassembly orientation the direction of metal mesh group.

Optionally, in the arc extinguish chamber structure, the flame extinguishing assembly further comprises a partition plate arranged between the adjacent flame extinguishing pieces, between the flame extinguishing pieces and the metal pore plate, and between the metal pore plate and the metal mesh group, and support ribs are arranged on the partition plate.

Optionally, in the arc extinguish chamber structure, the partition plate and the flame extinguishing plate are provided with a limiting chamfer and a limiting groove, and the base is provided with a chamfer matching portion matched with the limiting chamfer and a limiting protrusion matched with the limiting groove.

Optionally, in the arc extinguish chamber structure, the arc extinguish chamber further includes a first gas generating element disposed on the first side plate and a second gas generating element disposed on the second side plate, and the first gas generating element and the second gas generating element are both located on a side of the arc extinguish grid sheet assembly away from the base; one side of the first gas generation part close to the arc extinguishing grid plate component is provided with a first grid plate slot, one side of the second gas generation part close to the arc extinguishing grid plate component is provided with a second grid plate slot, and two ends of a pin of the arc extinguishing grid plate component are respectively inserted into the first grid plate slot and the second grid plate slot.

Optionally, in above-mentioned explosion chamber structure, one side that first product spare is close to the explosion chamber space is equipped with first electric arc direction curved surface, one side that second product spare is close to the explosion chamber space is equipped with second electric arc direction curved surface, certainly the bottom of first product spare is towards the direction of arc extinguishing bars piece subassembly, first electric arc direction curved surface with distance between the second electric arc direction curved surface diminishes gradually.

Optionally, in the above arc extinguishing chamber structure, one side of the first gas generating element close to the arc chute plate assembly is provided with a first extending tooth, the first extending tooth extends into the arc extinguishing chamber space from one side of the first gas generating element close to the arc chute plate assembly, and the first chute plate slot is formed between the adjacent first extending teeth.

Optionally, in the arc extinguish chamber structure, the base is further provided with a sealing ring mounting groove and a mounting boss, the sealing ring mounting groove is used for mounting a sealing ring, and the first side plate and the second side plate are both provided with a jack used for being matched with the mounting boss.

A circuit breaker comprising an arc chute structure as described above.

When the arc extinguish chamber structure provided by the utility model is used, an inverted pi-shaped arc extinguish chamber frame is formed through the first side plate, the second side plate and the base, an arc extinguish chamber space is formed among the base, the first side plate and the second side plate, and the arc striking plate and the arc extinguish grid plate component are arranged in the arc extinguish chamber space; because the arc extinguish chamber space is positioned in the cavity of the circuit breaker and above the cavity of the movable and fixed contacts, when the movable contact and the fixed contact of the circuit breaker are disconnected in the cavity of the movable and fixed contacts, generated electric arcs can enter the arc extinguish chamber space; because the long grid piece group comprises a plurality of long grid pieces which are sequentially arranged in parallel, the short grid piece group comprises a plurality of short grid pieces which are sequentially arranged in parallel, and the long grid pieces and the short grid pieces are both arranged in parallel and are perpendicular to the plane where the first side plate is arranged and the plane where the second side plate is arranged, electric arc channels are formed between the adjacent long grid pieces and between the adjacent short grid pieces, and after electric arcs enter the space of the arc extinguish chamber, the electric arcs enter the electric arc channels formed by the arc extinguish grid piece assemblies and are separated into a plurality of sections of short arcs through the arc extinguish grid piece assemblies; the arc striking plate comprises an arc striking plate body and an arc guiding plate, the arc striking plate body, the short grid plate group and the long grid plate group are sequentially arranged in the arc extinguishing chamber space, the arc guiding plate is bent from one side of the arc striking plate body, which is close to the moving contact cavity, to one side of the arc striking plate body, which is close to the long grid plate group, and an arc guiding channel is formed between the arc striking plate and the short grid plate, so that when electric arcs enter the arc extinguishing chamber space, a part of electric arcs enter between the short grid plate and the arc striking plate through the arc guiding channel; the arc striking plate body is provided with the through hole, the arc extinguishing chamber space is positioned in the cavity of the circuit breaker, and the through hole communicates the arc extinguishing chamber space with the cavity of the circuit breaker, so that the pressure intensity of the arc extinguishing chamber space close to one side of the arc striking plate is smaller, electric arc is promoted to move towards one side of the arc extinguishing chamber space close to the arc striking plate, the utilization rate of the short grid sheet group is improved, and the distance between the adjacent short grid sheets is larger than the distance between the adjacent long grid sheets, so that the air resistance of the short grid sheet group is smaller than that of the long grid sheet group, the electric arc can more easily enter the short grid sheet gap of the short grid sheet group, and the utilization rate of the short grid sheet group is further improved; meanwhile, hot air generated by electric arc forms circulation between the arc guide channel and the cavity of the circuit breaker, so that the arc extinguishing capability of the arc extinguishing chamber structure is improved, and the breaking capability of the circuit breaker is improved. To sum up, the utility model provides an explosion chamber structure has higher arc extinguishing ability than current explosion chamber structure, can satisfy the disconnected branch of the voltage branch who exchanges more than 1000V and DC voltage, has better suitability and commonality, is fit for using widely in batches.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded schematic view of an arc extinguish chamber according to an embodiment of the present invention;

fig. 2 is a schematic view of an assembly structure of an arc extinguish chamber structure according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an arc chute assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a base according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a first gas generating member according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a first gas generating member provided with first extending teeth according to an embodiment of the present invention;

fig. 7 is a schematic structural view illustrating a first gas generating member and a second gas generating member cooperating with an arc chute assembly according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a first partition board according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a second partition board according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a third partition board provided in an embodiment of the present invention;

FIG. 11 is a schematic view of the arc moving in the arc extinguishing chamber structure when the arc striking plate is not cutting the through hole;

fig. 12 is a schematic view of an assembly structure of an arc striking plate cut with a through hole on an arc extinguishing chamber frame according to an embodiment of the present invention;

fig. 13 is a schematic view illustrating the arc circulating between the arc extinguish chamber and the cavity of the circuit breaker when the arc striking plate provided by the embodiment of the present invention is cut with a through hole.

100 is an arc extinguishing chamber frame, 101 is a first side plate, 102 is a second side plate, 103 is a base, 1031 is an arc circulation hole, 1032 is a sealing ring installation groove, 1033 is an installation boss, 1034 is a chamfer matching portion, 1035 is a limiting protrusion, 104 is an installation plate, 105 is a sealing ring, 200 is an arc striking plate, 201 is a through hole, 300 is an arc extinguishing grid plate component, 301 is a long grid plate group, 302 is a short grid plate group, 400 is an arc extinguishing component, 401 is a first arc extinguishing plate, 4011 is a buffer hole, 402 is a second arc extinguishing plate, 403 is a metal hole plate, 404 is a metal mesh group, 4041 is a first metal mesh, 4042 is a second metal mesh, 4043 is a third metal mesh, 405 is a partition, 4051 is a limiting chamfer, 4052 is a limiting groove, 4053 is a support rib, 500 is a first gas production piece, 501 is a first grid plate, 502 is a first arc guiding curved surface, 503 is a first extending tooth, 504 is a first gas production piece, and 600 is a second gas production piece.

Detailed Description

In view of this, the core of the present invention is to provide an arc extinguish chamber structure to improve the versatility of the circuit breaker.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 13, an embodiment of the present invention discloses an arc extinguish chamber structure, which includes an arc extinguish chamber frame 100, an arc striking plate 200 and an arc extinguishing grid plate assembly 300.

The arc extinguish chamber frame 100 comprises a first side plate 101, a second side plate 102 and a base 103, wherein the first side plate 101 and the second side plate 102 are arranged in parallel, two ends of the base 103 are respectively connected with the first side plate 101 and the second side plate 102 to form an inverted pi-shaped structure, an arc extinguish chamber space is formed among the base 103, the first side plate 101 and the second side plate 102, the arc extinguish chamber space is located in a cavity of the circuit breaker and above a cavity of a moving contact and a static contact, and when a moving contact and the static contact of the circuit breaker are disconnected in the cavity of the moving contact and the static contact, electric arcs are generated; the arc-extinguishing grid plate assembly 300 comprises a long grid plate group 301 and a short grid plate group 302, the long grid plate group 301 comprises a plurality of long grid plates which are sequentially arranged in parallel, the short grid plate group 302 comprises a plurality of short grid plates which are sequentially arranged in parallel, the long grid plates and the short grid plates are both arranged in parallel and are perpendicular to the plane where the first side plate 101 is located and the plane where the second side plate 102 is located, arc channels are formed between every two adjacent long grid plates and between every two adjacent short grid plates, and the distance between every two adjacent short grid plates is larger than the distance between every two adjacent long grid plates; arc extinguishing bars piece subassembly 300 and arc striking piece 200 all set up in above-mentioned explosion chamber space, and arc striking piece 200 includes the arc striking piece body and leads the arc piece, and the arc striking piece body arranges the setting in proper order with short bars piece group 302, long bars piece group 301 in the explosion chamber space, and the arc striking piece body is equipped with through-hole 201, leads the arc piece and is close to from the arc striking piece body a dynamic and static contact cavity one side is close to a lateral buckling of long bars piece group 301, forms between arc striking piece 200 and short bars piece and leads the arc passageway.

When the arc extinguish chamber structure provided by the utility model is used, the inverted pi-shaped arc extinguish chamber frame 100 is formed through the first side plate 101, the second side plate 102 and the base 103, an arc extinguish chamber space is formed among the base 103, the first side plate 101 and the second side plate 102, and the arc striking plate 200 and the arc extinguish grid plate component 300 are arranged in the arc extinguish chamber space; because the arc extinguish chamber space is positioned in the cavity of the circuit breaker and above the cavity of the movable and fixed contacts, when the movable contact and the fixed contact of the circuit breaker are disconnected in the cavity of the movable and fixed contacts, generated electric arcs can enter the arc extinguish chamber space; because the long grid plate group 301 comprises a plurality of long grid plates which are sequentially arranged in parallel, and the short grid plate group 302 comprises a plurality of short grid plates which are sequentially arranged in parallel, the long grid plates and the short grid plates are both arranged in parallel and are perpendicular to the plane of the first side plate 101 and the plane of the second side plate 102, an arc channel is formed between every two adjacent long grid plates and between every two adjacent short grid plates, and after entering the arc extinguishing chamber space, the arc enters the arc channel formed by the arc extinguishing grid plate assembly 300 and is divided into a plurality of short arcs through the arc extinguishing grid plate assembly 300; because the arc striking piece 200 comprises an arc striking piece body and arc guiding pieces, the arc striking piece body, the short grid piece group 302 and the long grid piece group 301 are sequentially arranged in the arc extinguishing chamber space, the arc guiding pieces are bent from one side of the arc striking piece body, which is close to the moving contact cavity, to one side of the arc striking piece body, which is close to the long grid piece group 301, and an arc guiding channel is formed between the arc striking piece 200 and the short grid pieces, when electric arcs enter the arc extinguishing chamber space, a part of electric arcs enter between the short grid pieces and the arc striking piece 200 through the arc guiding channel; because the arc striking plate body is provided with the through hole 201, the arc extinguishing chamber space is positioned in the cavity of the circuit breaker, and the through hole 201 communicates the arc extinguishing chamber space with the cavity of the circuit breaker, the pressure intensity of the arc extinguishing chamber space close to one side of the arc striking plate 200 is smaller, so that electric arcs move to one side of the arc extinguishing chamber space close to the arc striking plate, the utilization rate of the short grid plate group 302 is improved, and the distance between the adjacent short grid plates is larger than the distance between the adjacent long grid plates, so that the air resistance of the short grid plate group 302 is smaller than that of the long grid plate group 301, electric arcs can more easily enter the short grid plate gap of the short grid plate group 302, and the utilization rate of the short grid plate group 302 is further improved; meanwhile, hot gas generated by electric arc forms circulation between the arc guide channel and the cavity of the circuit breaker, so that the arc extinguishing capacity of the arc extinguishing chamber structure is improved, and the breaking capacity of the circuit breaker is improved. To sum up, the utility model provides an explosion chamber structure has higher arc extinguishing ability than current explosion chamber structure, can satisfy the disconnected branch of the voltage branch who exchanges more than 1000V and DC voltage, has better suitability and commonality, is fit for using widely in batches.

For ease of understanding, a brief description of long and short grids is given, which are well known in the art, and the short and long grids are distinguished by: the short grills have a longitudinal length smaller than that of the long grills, that is, in fig. 1 and 2, the height of the short grills is smaller than that of the long grills in the vertical direction (not shown in the drawings).

And, the both ends of above-mentioned long bars piece, the both ends of short bars piece and the both ends of arc piece body are all pegged graft on first curb plate and second curb plate through the pin that its self structurally set up, realize the installation of long bars piece, short bars piece and arc piece body in the explosion chamber space, lead the arc piece unsettled in one side that the arc piece body is close to the sound contact cavity to play the guide effect.

It should be understood that the present invention is not limited to the specific parameters such as the shape, number and size of the through holes 201, and any parameters that can satisfy the use requirement are all within the protection scope of the present invention; optionally, the embodiment of the utility model provides a through-hole 201 is for being located the semi-circular through-hole on the striking plate body, simple structure, the processing of being convenient for.

In addition, the utility model does not limit the specific number of the long grid pieces and the short grid pieces, in practical application, the specific number of the long grid pieces and the short grid pieces can be adjusted according to the practical requirement, and the number of the long grid pieces and the short grid pieces which can meet the arc extinguishing requirement belongs to the protection range of the utility model; similarly, the present invention does not specifically limit the distance between the adjacent short grid pieces and the distance between the adjacent long grid pieces, as long as the distance between the adjacent short grid pieces is greater than the distance between the adjacent long grid pieces.

Further, the utility model provides a thickness of short bars piece is less than the thickness of long bars piece to save the occupation space of single short bars piece, under the condition that does not increase occupation space, increase the quantity of arranging of short bars piece, improve the breaking capacity of circuit breaker.

As shown in fig. 1, the utility model provides an explosion chamber structure is still including going out flame subassembly 400, be equipped with the installation cavity on the base 103, the installation cavity is located the top in explosion chamber space, it sets up in the installation cavity to go out flame subassembly 400, it goes out the flame piece to go out flame subassembly 400 at least including a slice, because it installs in the installation cavity to go out flame subassembly 400, arc extinguishing bars piece subassembly 300 sets up in explosion chamber space, therefore, it is located the top of arc extinguishing bars piece subassembly 300 to go out flame subassembly 400, and it all is equipped with a plurality of buffer holes 4011 to go out every of flame subassembly 400, buffer holes 4011 is multirow distribution on the flame piece of going out and arranges, so that play effects such as cooling buffering to electric arc.

It should be understood that the present invention does not specifically limit the shapes, numbers, etc. of the buffer holes 4011, and the number and the shapes that can satisfy the use requirement all fall within the protection scope of the present invention; optionally, the embodiment of the utility model provides a buffer hole 4011 is the round hole, simple structure, the manufacturing of being convenient for.

In addition, the flame-extinguishing sheet is made of high-temperature-resistant insulating substances, so that the influence of high temperature and electric arc on the flame-extinguishing sheet is reduced, and the service life of the flame-extinguishing sheet is prolonged.

Further, the side of the base 103 adjacent to the arc chute assembly 300 is provided with arc runner holes 1031, the arc runner holes 1031 are located on the side of the mounting cavity adjacent to the arc chute space, and the arc runner holes 1031 are aligned with the chute gaps of the arc chute assembly 300 to facilitate the upward movement of the arc from the bottom of the arc chute space into the flame quenching assembly 400 as described below.

It should be noted that the arc runner 1031 may be a waist-shaped hole, a rectangular hole, or a row of linearly aligned circular holes, and the like, and the shape of the hole that can meet the requirement of further use is within the protection scope of the present invention; optionally, the embodiment of the utility model provides an electric arc circulation hole 1031 is waist type hole, and the central line in waist type hole is on a parallel with the grid piece clearance of arc extinguishing bars piece subassembly 300 to make electric arc circulation hole 1031 align with the grid piece clearance of arc extinguishing bars piece subassembly 300, electric arc gets into electric arc circulation hole 1031 from the grid piece clearance of arc extinguishing bars piece subassembly 300, and the rethread flame extinguishing subassembly 400's flame piece that goes out carries out the arc extinguishing.

As shown in fig. 11 and 13, the utility model discloses with the buffer hole 4011 on the flame piece that goes out that is close to the explosion chamber space in the base 103 (the bottommost flame piece that goes out in the base 103) and the electric arc circulation hole 1031 dislocation set on the base 103, with the buffer hole 4011 dislocation set on the adjacent flame piece that goes out to be favorable to electric arc to extinguish more, improve the breaking capacity of circuit breaker, and reduce the metal particle that the electric arc cooling produced and fall back to in the explosion chamber space.

In a specific embodiment of the utility model, the quantity of flame piece of going out is two, be first flame piece 401 and the second flame piece 402 that goes out respectively, first flame piece 401 and the second flame piece 402 that goes out sets gradually from the direction of the installation cavity of the directional base in arc-extinguishing chamber space, that is to say, first flame piece 401 and the second flame piece 402 that goes out sets gradually along the ascending direction of electric arc, arc runner hole 1031 on the base 103 and the crisscross setting of buffer hole 4011 on the first flame piece 401 that goes out, buffer hole 4011 on the first flame piece 401 that goes out and the crisscross setting of buffer hole on the second flame piece that goes out, in order to be favorable to electric arc to extinguish more, improve the disjunction ability of circuit breaker, and reduce the metal particle that arc cooling produced and fall back to in the arc-extinguishing chamber space.

As shown in fig. 1, the flame-extinguishing assembly 400 further includes a metal orifice plate 403 disposed in the mounting cavity of the base 103 and located on a side of the flame-extinguishing plate away from the arc-extinguishing grid assembly 300, and a metal mesh group 404 disposed on a side of the metal orifice plate 403 away from the flame-extinguishing assembly 400, so as to intercept metal particles generated during cooling of the arc through the metal orifice plate 403 and simultaneously perform a cooling function; the metal mesh group 404 further intercepts metal particles generated during arc cooling, and reduces the influence of the metal particles on the external environment of the arc extinguish chamber structure.

The metal net group 404 may include a single-layer metal net or a multi-layer metal net, the present invention does not limit the specific number of the metal net group 404, and the number of the metal net group as long as the number can meet the use requirement is within the protection scope of the present invention; optionally, the metal mesh group 404 provided by the present invention comprises a multilayer metal mesh.

Specifically, as shown in fig. 1, in a specific embodiment of the present invention, the metal mesh group 404 includes three metal meshes, the three metal meshes are sequentially arranged along a first direction, which is respectively a first metal mesh 4041, a second metal mesh 4042 and a third metal mesh 4043, the first direction is a direction from the arc extinguishing chamber space toward the mounting cavity of the base, that is, the first metal mesh 4041, the second metal mesh 4042 and the third metal mesh 4043 are sequentially arranged on a side of the flame extinguishing piece departing from the arc extinguishing grid piece assembly 300, and the mesh numbers of the first metal mesh 4041, the second metal mesh 4042 and the third metal mesh 4043 are sequentially reduced along the first direction, that is, the mesh number of the first metal mesh 4041 is greater than the mesh number of the second metal mesh 4042, the mesh number of the second metal mesh 4042 is greater than the mesh number of the third metal mesh 4043, so as to intercept metal particles generated during cooling as much as possible, and reduce the influence of the metal particles on the external environment of the arc extinguishing chamber structure.

Further, the flame extinguishing assembly 400 further comprises a partition plate 405 arranged between adjacent flame extinguishing plates, between the flame extinguishing plates and the metal pore plate 403 and between the metal pore plate 403 and the metal mesh group 404, a support rib 4053 is arranged on the partition plate 405, and the support rib 4053 is convex on the partition plate 405, so that the support rib 4053 supports the flame extinguishing plates, the metal pore plate 403 and the metal mesh, and the deformation phenomenon of the flame extinguishing plates, the metal pore plate 403 and the metal mesh caused by high temperature in the arc extinguishing process is reduced.

It should be understood that the present invention is not limited to the structural form of the supporting ribs 4053 and the arrangement form on the partition 405, and the structural form and the arrangement form that can satisfy the use requirement all belong to the protection scope of the present invention.

As shown in fig. 8, in an embodiment of the present invention, the supporting ribs 4053 are parallel rib structures parallel to the side length of the partition 405; as shown in fig. 9, in another embodiment of the present invention, the supporting ribs 4053 are cross-shaped cross-bar structures; in another embodiment of the present invention, as shown in fig. 10, the spacer 405 is an inclined rib structure parallel to the diagonal of the spacer 405.

In addition, a limit chamfer 4051 and a limit groove 4052 are provided on the spacer 405, and a chamfer matching portion 1034 matching with the limit chamfer 4051 and a limit projection 1035 matching with the limit groove 4052 are provided on the base 103, so that the relative position of the spacer 405 and the base 103 is limited by the matching of the limit chamfer 4051 and the chamfer matching portion 1034 and the matching of the limit groove 4052 and the limit projection 1035, and the limit of the spacer 405 is realized.

The utility model provides a base 103 still is equipped with sealing washer mounting groove 1032 and installation base 1033, base 103 is square structure, form pi style of calligraphy structure after base 103 is connected with first curb plate 101 and second curb plate 102, in the circuit breaker cavity, the periphery of base 103 stretches out and laminates the installation with the inner wall of sound contact cavity, sealing washer mounting groove 1032 locates the laminating position of base 103 periphery and sound contact cavity inner wall, in order to lay sealing washer 105 in sealing washer mounting groove 1032, prevent that electric arc from escaping between the inner wall of this explosion chamber structure and sound contact cavity, play a positive role to the arc extinguishing, improve the arc extinguishing ability of this explosion chamber structure; moreover, the base 103 is further provided with a mounting boss 1033, and the first side plate 101 and the second side plate 102 are both provided with insertion holes for being matched with the mounting boss 1033, so that the base 103 is mounted on the first side plate 101 and the second side plate 102 through the matching of the mounting boss 1033 and the insertion holes.

The sealing ring 105 is made of a heat-resistant and elastic material, such as nitrile, silica gel or fluororubber, so that the sealing ring 105 can be tightly sleeved in the sealing ring mounting groove 1032, the connection tightness is improved, high temperature generated by electric arc can be borne, and the service life of the sealing ring 105 is prolonged.

As shown in fig. 1, the arc chute frame 100 of the present invention further comprises a mounting plate 104 to cover the mounting plate 104 above the base 103, and then the base 103 and the mounting plate 104 are connected by screws to form a completed arc chute frame 100.

As shown in fig. 5 and 7, the arc extinguishing chamber structure further includes a first gas generating element 500 disposed on the first side plate 101 and a second gas generating element 600 disposed on the second side plate 102, where the first gas generating element 500 and the second gas generating element 600 are both located on one side of the arc chute assembly 300 close to the moving contact and the stationary contact, that is, the first gas generating element 500 and the second gas generating element 600 are located at an arc inlet of the arc extinguishing chamber space, so that the first gas generating element 500 and the second gas generating element 600 generate a large amount of gas under the action of arc erosion to push the arc to ascend; first product gas piece 500 is equipped with first bars piece slot 501 near one side of arc extinguishing bars piece subassembly 300, one side that second product gas piece 600 is close to arc extinguishing bars piece subassembly 300 is equipped with the second bars piece slot, the pin both ends of arc extinguishing bars piece subassembly 300 alternate respectively in first bars piece slot 501 and in the second bars piece slot, in order to wrap up the pin of arc extinguishing bars piece subassembly 300 in first product gas piece 500 and second product gas piece 600, play the guard action to arc extinguishing bars piece subassembly 300.

It should be noted that the structures of the first gas generating piece 500 and the second gas generating piece 600 may be the same or different, and all structures that can satisfy the use requirement belong to the protection scope of the present invention; optionally, the embodiment of the present invention provides a first gas generating member 500 and a second gas generating member 600 with the same structure, so as to improve the generalization rate of the components and reduce the manufacturing cost.

Above-mentioned one side that first gas production spare 500 is close to the explosion chamber space is equipped with first electric arc direction curved surface 502, one side that second gas production spare 600 is close to the explosion chamber space is equipped with second electric arc direction curved surface, one side that is close to the moving contact cavity from first gas production spare 500 and second gas production spare 600 is towards the direction of arc extinguishing bars piece subassembly 300, distance between first electric arc direction curved surface 502 and the second electric arc direction curved surface diminishes gradually, play the guide effect to electric arc through first electric arc direction curved surface 502 and second electric arc direction curved surface, make electric arc to the central point between first curb plate 101 and the second curb plate 102 put the removal, improve the arc extinguishing effect.

The utility model discloses do not do specifically prescribe a limit to the camber of above-mentioned first arc direction curved surface 502 and second arc direction curved surface, among the practical application, can be according to the camber of first arc direction curved surface 502 of actual demand adaptability adjustment and second arc direction curved surface, as long as can satisfy operation requirement's camber all belongs to the utility model discloses in the protection range.

As shown in fig. 6, in the utility model discloses in another embodiment, one side that first gas production piece 500 is close to arc extinguishing bars piece subassembly 300 is equipped with first extension tooth 503, first extension tooth 503 extends to the explosion chamber space from its one side that is close to arc extinguishing bars piece subassembly 300, form first bars piece slot 501 between the adjacent first extension tooth 503, so that increase first gas production piece 500's volume, make first gas production piece 500 extend to the explosion chamber space in simultaneously, further improve the guide effect to electric arc, make the electric arc in explosion chamber space draw close to the middle part, improve the arc extinguishing ability of this explosion chamber structure.

In addition, the first gas production piece 500 is further provided with a first rivet hole 504, so that the first gas production piece 500 is mounted on the first side plate 101 through rivet connection, and the first gas production piece 500 is fixed on the first side plate 101.

Since the second gas generating member 600 has the same structure as the first gas generating member 500, the second gas generating member 600 has the same technical effect as the first gas generating member 500, and thus, the detailed description thereof is omitted.

When the arc extinguish chamber structure is assembled, firstly, the first gas generating piece 500 and the second gas generating piece 600 are respectively arranged on the first side plate 101 and the second side plate 102 through rivet connection, and the sealing ring 105 is arranged in the sealing ring installation groove 1032 on the base 103; then, the arc extinguishing grid piece assembly 300 is installed between the first side plate 101 and the second side plate 102 through the matching of grid piece pins on the arc extinguishing grid piece assembly 300 and the first side plate 101 and the second side plate 102, the arc striking piece 200 is installed between the first side plate 101 and the second side plate 102 through the matching of pins on the arc striking piece 200 and the first side plate 101 and the second side plate 102, the base 103 is installed between the first side plate 101 and the second side plate 102 through the matching of an installation boss 1033 on the base 103 and insertion holes on the first side plate 101 and the second side plate 102, the installation of the arc extinguishing grid piece assembly 300, the arc striking piece 200 and the base 103 on the first side plate 101 and the second side plate 102 is realized, and an arc extinguishing chamber frame is formed; after the arc extinguish chamber frame is built, the first flame extinguishing sheet 401, the second flame extinguishing sheet 402, the metal hole plate 403, the metal mesh group 404 and the partition plate 405 are sequentially placed in the installation cavity of the base 103, assembly errors are effectively prevented through the matching of the limiting features of the parts and the corresponding limiting structures in the installation cavity, and finally the installation plate 104 is covered above the base 103 and is connected with the base 103 and the installation plate 104 through screws to form a complete arc extinguish chamber structure.

The arc extinguishing process of the arc extinguishing chamber structure is as follows: after the contact of the circuit breaker is broken, the arc firstly moves upwards through the arc-extinguishing grid piece assembly 300, then passes through the arc flowing hole 1031 of the base 103, then sequentially passes through the first flame-extinguishing piece 401 and the second flame-extinguishing piece 402, the first flame-extinguishing piece 401 and the second flame-extinguishing piece 402 play a role in rapidly cooling and breaking the arc, then passes through the metal hole plate 403, the metal hole plate 403 plays an adsorption role in metal particles of the arc and plays a cooling role in the arc, finally the arc sequentially passes through the first metal mesh 4041, the second metal mesh 4042 and the third metal mesh 4043, and the metal mesh group 404 plays an intercepting role in metal particles generated in the arc; as shown in fig. 13, since the through hole 201 of the arc-extinguishing piece communicates the rear of the arc-extinguishing chamber space with the cavity of the circuit breaker, when the contact is disconnected, the pressure of the arc-extinguishing chamber space is lower than that of the front due to the characteristics of the gas generated by the first gas-generating piece 500 and the second gas-generating piece 600 and the electric arc, so that the electric arc is moved to the rear of the arc-extinguishing chamber space, and the utilization rate of the rear grid piece is improved; the hot gas that electric arc produced forms the circulation between the rear in explosion chamber space and circuit breaker cavity, is favorable to improving the arc extinguishing ability of this explosion chamber structure more, improves the breaking capacity of circuit breaker.

Furthermore, the utility model also discloses a circuit breaker, include as above the explosion chamber structure, consequently had all technological effects of above-mentioned explosion chamber structure concurrently, this paper is no longer repeated once more here.

The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An arc chute structure, comprising:

the arc striking piece is arranged in the arc extinguishing chamber space and comprises an arc striking piece body and an arc guiding piece used for guiding electric arcs, the arc striking piece body is arranged on one side, deviating from the long grid piece group, of the short grid piece group, and a through hole is formed in the arc striking piece body.

2. The arc chute structure of claim 1, wherein the thickness of the short grid is less than the thickness of the long grid.

3. The arc extinguish chamber structure according to claim 1, further comprising a flame extinguishing assembly, wherein an installation cavity is arranged on the base, the flame extinguishing assembly is arranged in the installation cavity, the flame extinguishing assembly at least comprises a flame extinguishing sheet, and each flame extinguishing sheet is provided with a plurality of buffer holes.

4. The arc extinguishing chamber structure according to claim 3, characterized in that an arc runner hole is formed in one side of the base, which is close to the arc extinguishing grid plate assembly, and is located at the bottom of the mounting cavity, the arc runner hole is aligned with a grid plate gap of the arc extinguishing grid plate assembly, and the buffer hole in the flame extinguishing plate adjacent to the base, the arc runner hole in the base, and the buffer hole in the adjacent flame extinguishing plate are arranged in a staggered manner.

5. The arc extinguish chamber structure according to claim 4, wherein the flame extinguishing assembly further comprises a metal hole plate arranged on one side of the flame extinguishing sheet far away from the arc extinguishing grid sheet assembly, and a metal mesh group arranged on one side of the metal hole plate far away from the flame extinguishing assembly.

6. The arc extinguishing chamber structure according to claim 5, characterized in that the metal mesh group comprises a plurality of layers of metal meshes, the plurality of layers of metal meshes are sequentially arranged along a first direction, the mesh number of the plurality of layers of metal meshes is sequentially reduced along the first direction, and the first direction is a direction from the flame extinguishing component to the metal mesh group.

7. The arc extinguishing chamber structure according to claim 5, characterized in that the flame extinguishing assembly further comprises a partition plate arranged between the adjacent flame extinguishing sheets, between the flame extinguishing sheets and the metal pore plate, and between the metal pore plate and the metal mesh group, and support ribs are arranged on the partition plate.

8. The arc extinguish chamber structure according to claim 7, wherein the partition plate and the flame extinguishing sheet are provided with a limiting chamfer and a limiting groove, and the base is provided with a chamfer matching part matched with the limiting chamfer and a limiting protrusion matched with the limiting groove.

9. The arc chute structure according to claim 1, further comprising a first gas generating member disposed on the first side plate and a second gas generating member disposed on the second side plate, wherein the first gas generating member and the second gas generating member are both located on a side of the arc chute plate assembly away from the base; one side of the first gas generation part close to the arc extinguishing grid plate component is provided with a first grid plate slot, one side of the second gas generation part close to the arc extinguishing grid plate component is provided with a second grid plate slot, and two ends of a pin of the arc extinguishing grid plate component are respectively inserted into the first grid plate slot and the second grid plate slot.

10. The arc extinguishing chamber structure according to claim 9, wherein a first arc guiding curved surface is disposed on a side of the first gas generating member close to the arc extinguishing chamber space, and a second arc guiding curved surface is disposed on a side of the second gas generating member close to the arc extinguishing chamber space, and a distance between the first arc guiding curved surface and the second arc guiding curved surface gradually decreases from a bottom of the first gas generating member toward the arc extinguishing grid piece assembly.

11. The arc extinguish chamber structure according to claim 9, wherein one side of the first gas generating member, which is close to the arc extinguishing grid plate assembly, is provided with a first extending tooth, the first extending tooth extends into the arc extinguish chamber space from one side of the first extending tooth, and the first grid plate slot is formed between the adjacent first extending teeth.

12. The arc extinguishing chamber structure according to claim 1, characterized in that the base is further provided with a sealing ring mounting groove and a mounting boss, the sealing ring mounting groove is used for mounting a sealing ring, and the first side plate and the second side plate are both provided with insertion holes for matching with the mounting boss.

13. A circuit breaker characterized by comprising an arc-extinguishing chamber structure according to any one of claims 1 to 12.