CN216871882U

CN216871882U - Arc extinguish chamber structure of universal circuit breaker

Info

Publication number: CN216871882U
Application number: CN202220720266.3U
Authority: CN
Inventors: 朱家逵; 刘伦; 刘振武; 朱志荣; 刘添喜; 洪翠林; 王惜晨; 钱云鹏
Original assignee: Zhejiang People Ele Appliance Co ltd
Current assignee: Zhejiang People Ele Appliance Co ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-01
Anticipated expiration: 2032-03-29

Abstract

The utility model discloses an arc extinguish chamber structure of a universal circuit breaker, which comprises an arc extinguish chamber formed by the involutory fixation of an upper cover plate and a lower cover plate, an exhaust chamber and a plurality of arc extinguish grid sheets arranged in the arc extinguish chamber, wherein one side of each arc extinguish grid sheet facing to an arc inlet is provided with an arc guide notch gradually shrinking from a notch to a groove bottom, one side of each arc extinguish chamber is provided with an arc striking sheet structure extending to the arc inlet, the arc extinguish grid sheets are sequentially arranged at intervals in a left-right staggered manner in the arc extinguish chamber along the arrangement direction, and the arc guide notches are sequentially arranged at intervals in a vertical staggered manner in the arc extinguish chamber along the arrangement direction, so that the arc extinguish chamber structure has better elongation and cutting effects on the arc entering the arc extinguish grid sheets, divides the arc into a plurality of short arcs in the movement so as to avoid the arc extinguish chamber from overflowing, and can adsorb and eliminate ionized ions in gas through an arc eliminating net sheet arranged in the exhaust chamber, the purpose of rapid arc extinction is achieved.

Description

Arc extinguish chamber structure of universal circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to an arc extinguish chamber structure of a universal circuit breaker.

Background

In order to ensure the reliable operation of the circuit breaker, an arc extinguishing chamber is usually arranged in the circuit breaker to extinguish the electric arc, and a plurality of arc extinguishing grid pieces of the arc extinguishing chamber cut the electric arc into a plurality of sections, thereby improving the electric arc voltage and achieving the purpose of quickly extinguishing the electric arc. However, since the arc gas contains metal particles, which tend to short-circuit conductive components or electrical devices around the circuit breaker, a common measure is to provide a deionization net at the outlet of the arc extinguishing chamber to cool and deionize the arc extinguishing gas.

For example, chinese patent document CN214313110U discloses an arc extinguishing apparatus for a circuit breaker, which includes an arc extinguishing chamber, a plurality of arc extinguishing grid pieces and a metal mesh structure, wherein the arc extinguishing chamber is formed by an upper cover plate and a lower cover plate which are combined together, and includes an arc extinguishing chamber having an arc leading opening, and an exhaust chamber connected to the rear end of the arc extinguishing chamber; specifically, as can be seen from the attached drawings of the reference, a plurality of arc-extinguishing grid plates are arranged in the arc-extinguishing cavity in a left-right staggered manner along the arrangement direction of the arc-extinguishing grid plates, a metal mesh plate structure is arranged in the exhaust cavity and used for eliminating free gas, the arc-extinguishing grid plates are arranged in a flat plate-shaped structure, the metal mesh plate structure comprises a first metal mesh and a second metal mesh which are arranged side by side, a first clamping table and a second clamping table are correspondingly arranged on two sides of an upper cover plate and two sides of a lower cover plate, and the upper cover plate and the lower cover plate are clamped and fixed by inserting a clamping sleeve between the first clamping table and the second clamping table.

As can be seen from the structure of the arc extinguishing device, the following problems still exist: the arc-extinguishing grid pieces distributed in the arc-extinguishing chamber are not sufficient enough to contact with the electric arc, have poor arc striking and cutting effects on the electric arc, are not beneficial to extinguishing the electric arc, and particularly can not effectively suck the electric arc into the arc-extinguishing chamber when the arc spraying occurs, so that the arc-extinguishing chamber has an arc overflow phenomenon, and the arc-extinguishing capacity and the service life of the arc-extinguishing chamber are influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the problems that arc extinguishing grid pieces distributed in an arc extinguishing chamber in the prior art are not in sufficient contact with electric arcs, the arc striking and cutting effects on the electric arcs are poor, the arc extinguishing effect is influenced, and the arc extinguishing chamber has an arc overflow phenomenon.

In order to solve the problems, the utility model provides an arc extinguishing chamber structure of a universal circuit breaker, which comprises an arc extinguishing chamber formed by fixedly closing an upper cover plate and a lower cover plate, an exhaust chamber connected at the rear end of the arc extinguishing chamber, and an exhaust groove arranged between the arc extinguishing chamber and the exhaust chamber, wherein a plurality of arc extinguishing grid plates are arranged in the arc extinguishing chamber at intervals, at least one layer of dissociation eliminating net plate is arranged in the exhaust chamber, an arc inlet is arranged at the front end of the arc extinguishing chamber, one side of each arc extinguishing grid plate, facing the arc inlet, is provided with an arc guide notch gradually contracting from a notch to a groove bottom, the arc guide notch is arranged by deviating from the central line in the width direction of the arc extinguishing grid plate, one side of the arc extinguishing chamber is provided with an arc striking plate structure extending to the arc inlet, and the plurality of arc extinguishing grid plates are arranged in the arc extinguishing chamber at intervals in a left-right staggered mode along the arrangement direction of the arc extinguishing chamber, and a plurality of arc guide notches on the arc extinguishing grid pieces are arranged in the arc extinguishing chamber at intervals in sequence in a vertically staggered manner along the arrangement direction.

As a preferred scheme, the arc striking plate structure is arranged between the upper cover plate and the lower cover plate through a positioning structure, and comprises a flat plate part parallel to the arc extinguishing grid plate and a bending part which is formed by extending the flat plate part and is partially surrounded at the arc inlet.

As a preferable aspect, the positioning structure includes: the two line grooves which are correspondingly arranged on one side of the upper cover plate and one side of the lower cover plate and are used for positioning and connecting the flat sheet part, the positioning clamping blocks which are arranged on two sides of the flat sheet part, and the positioning clamping grooves which are correspondingly arranged in the two line grooves and are matched and clamped with the positioning clamping blocks.

As a preferred scheme, the arc guiding notch is of a V-shaped structure, and includes a bell mouth arranged on one side edge of the arc extinguishing grid piece, the caliber of which is gradually reduced from outside to inside, a V-shaped groove connected with the bell mouth, and an arc groove arranged at the end of the V-shaped groove.

As a preferred scheme, a plurality of groups of strip-shaped slots for mounting a plurality of arc-extinguishing grid pieces are oppositely arranged on the inner walls of two sides of the arc-extinguishing chamber, and the plurality of groups of strip-shaped slots are arranged in a left-right staggered manner along the arrangement direction of the plurality of arc-extinguishing grid pieces.

As a preferred scheme, the upper cover plate and the lower cover plate are correspondingly provided with two inclined plane bosses which are opposite to the rear end of the arc extinguish chamber, and the rear end of the arc extinguish chamber is provided with a guide inclined opening which is formed by the two inclined plane bosses and is connected with the exhaust chamber.

As a preferred scheme, two groups of arc striking column structures are arranged on the front side and the rear side of the exhaust chamber, and the dissociation eliminating net sheets are double-layer metal net sheets which are arranged between the two rows of arc striking column structures in a limiting mode.

As a preferred scheme, two sets of striking post structures include a plurality of striking posts that set up at interval in proper order to be formed with a plurality of between a plurality of striking posts the exhaust duct, the exhaust duct interval shaping is in on the back lateral wall of exhaust chamber.

As a preferred scheme, two sets of mounting bosses are oppositely arranged on two sides of the upper cover plate and the lower cover plate, two mounting clamping sleeves are respectively sleeved on the two sets of mounting bosses in an extruding manner, and fastening components are respectively fastened and penetrated between the two mounting clamping sleeves and the two sets of mounting bosses.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. the arc extinguishing chamber structure of the universal circuit breaker provided by the utility model has the advantages that the arc extinguishing grid pieces are divided into a plurality of short arcs in motion, the cut and elongated short arcs are enlarged to contact with the outside air by utilizing the plurality of arc guide notches, and the arc is cooled, the total arc voltage drop is increased to be not enough to maintain the arc burning again, so that the arc extinguishing chamber is prevented from generating an arc overflow phenomenon, and the deionization mesh arranged in the exhaust chamber can adsorb and eliminate electric ions in arc extinguishing gas, so that deionization is realized, the aim of quickly extinguishing the arc is finally fulfilled, a zero-flashover effect is really realized, and the arc extinguishing capability and the service life of the arc extinguishing chamber of the circuit breaker are improved.

2. In the arc extinguish chamber structure of the universal circuit breaker, the arc guide notch is approximately in a V-shaped structure and is formed by sequentially connecting the horn mouth, the V-shaped groove and the arc groove, the arc guide notch is arranged towards the arc inlet, the contact range with the arc is large, and two longer arc guide edges are formed on two sides of the arc guide notch, so that arc striking and arc cutting effects are realized on the arc at the arc inlet, the contact area between the cut and elongated arc and outside air is increased, the arc cooling is facilitated, and the arc extinguish capability is improved.

3. According to the arc extinguish chamber structure of the universal circuit breaker, the deionization net sheet is a double-layer metal net sheet which is installed between the two rows of arc striking column structures in a limiting mode, the structure is arranged, the deionization net sheet is installed in the exhaust chamber in a limiting mode through the two rows of arc striking column structures, free gas discharged into the exhaust chamber can penetrate through the small holes in the double-layer metal net sheet, free metal ions can be adsorbed more easily through the double-layer metal net, and after two deionization treatments, the effects of absorbing and eliminating the free gas are achieved, and the phenomenon of arc flashover is avoided.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of an arc extinguishing chamber structure of a universal circuit breaker of the present invention;

FIG. 2 is a schematic structural view of the arc extinguish chamber structure of the present invention after hiding the upper cover plate;

FIG. 3 is a schematic view of the exhaust chamber of the present invention;

FIG. 4 is a schematic structural diagram of an arc chute of the present invention;

FIG. 5 is a schematic structural diagram of a tab structure according to the present invention;

description of reference numerals: 1. an upper cover plate; 11. a bevel boss; 12. mounting a boss; 13. installing a clamping sleeve; 2. a lower cover plate; 3. an arc extinguishing chamber; 31. a strip-shaped slot; 32. a wire groove; 4. an exhaust chamber; 41. an arc striking column structure; 5. arc extinguishing grid plates; 6. eliminating the free net sheet; 7. an arc striking sheet structure; 71. a flat sheet portion; 73. positioning a fixture block; 8. a guide arc notch; 81. a bell mouth; 82. a V-shaped groove; 83. an arc groove; 9. an air discharge groove.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.

In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment is described in detail below with reference to the accompanying drawings:

the embodiment provides as shown in fig. 1-5 an explosion chamber structure of universal circuit breaker, include by upper cover plate 1 with lower apron 2 to closing fixed explosion chamber 3 that forms, and connect the exhaust chamber 4 of 3 rear ends of explosion chamber, and set up exhaust duct 9 between explosion chamber 3 and the exhaust chamber 4, interval arrangement is provided with a plurality of arc extinguishing bars piece 5 in the explosion chamber 3, be provided with the deionization net piece 6 of at least one deck in the exhaust chamber 4, 3 front ends of explosion chamber are equipped with into arc mouth, its characterized in that: arc extinguishing bars piece 5 orientation one side of advancing the arc mouth is provided with the arc incision 8 of leading that is shrunk gradually by notch to tank bottom, it is skew to lead arc incision 8 the last central line of 5 width direction of arc extinguishing bars piece sets up, 3 one sides of explosion chamber are provided with and extend to the arc striking piece structure 7 of advancing arc mouth department, a plurality of arc extinguishing bars piece 5 are in along its array orientation staggered interval arrangement in proper order about in the explosion chamber 3 to it is in along array orientation to make a plurality of arc incisions 8 of leading on a plurality of arc extinguishing bars piece 5 staggered interval arrangement in proper order about in the explosion chamber 3.

The above embodiment is the core technical solution of this embodiment, an arc guiding notch 8 is provided on one side of the arc-extinguishing grid 5 facing the arc inlet, and an arc striking plate structure 7 is further provided at the arc inlet, the arc guiding notch and the arc striking plate structure design is more favorable for reducing the resistance of the arc entering the arc-extinguishing chamber 3, so that the arc can enter between the arc-extinguishing grid 5 of the arc-extinguishing chamber 3 more sufficiently and rapidly, and the arc can enter the arc-extinguishing chamber 3 more and more in a staggered manner according to the staggered spacing arrangement of the arc-extinguishing grid 5 in the arc-extinguishing chamber 3, and the arc guiding notches 8 on the arc-extinguishing grid 5 in a staggered manner up and down in the arc-extinguishing chamber 3, the design of this scheme has the advantages of better lengthening and cutting effects on the arc entering the arc-extinguishing grid 5, dividing the arc into a plurality of short arcs in motion, and increasing the contact of the cut and lengthened short arcs with the outside air by using the arc guiding notches 8, the arc is cooled, the total arc voltage drop is increased to be not enough to maintain the arc burning, the arc overflow phenomenon of the arc extinguish chamber 3 is avoided, the deionization mesh 6 arranged in the exhaust chamber 4 can adsorb and eliminate the electric ions in the arc extinguish gas, the deionization effect is achieved, the rapid arc extinguish purpose is finally achieved, the zero-flashover effect is truly achieved, and the arc extinguish capacity and the service life of the arc extinguish chamber 3 of the circuit breaker are improved.

The specific arrangement of the arc striking plate structure and the arc guiding notch is described in detail below with reference to fig. 3 to 5:

the striking structure 7 is in through location structure setting between upper cover plate 1 and the lower cover plate 2, it includes and is on a parallel with the flat piece portion 71 that arc extinguishing bars piece 5 set up to and extend by flat piece portion 71 partly surround in advance the kink of arc mouth department, location structure is used for the location to connect including corresponding setting at upper cover plate 1 and lower cover plate 2 one side respectively two line grooves 32 of flat piece portion 71, and set up the location fixture block 73 of flat piece portion 71 both sides, and correspond the setting in two line grooves 32 and with the location fixture block 73 cooperation clamping groove of joint, the benefit of design like this lies in, plays the location installation effect to striking structure 7 between upper cover plate and lower cover plate through the cooperation of location clamp groove and location fixture block, prevents that striking structure 7 from taking place the displacement skew condition when the installation, and location installation is reliable and stable.

Lead arc incision 8 and be the V-arrangement structure, it is including setting up in horn mouth 81 that 5 one side edges of arc extinguishing bars piece and bore outside-in dwindle gradually to and the V-arrangement groove 82 that links to each other with horn mouth 81, and set up the arc groove 83 at V-arrangement groove 82 tip, this kind leads arc incision 8 and is linked together in proper order by horn mouth 81, V-arrangement groove 82, arc groove 83 and constitutes to the arc mouth setting is advanced to the orientation, and the scope with the electric arc contact is big, it forms two longer arc edges of leading to lead arc incision 8 both sides, thereby it plays arc initiation and cutting electric arc effect to the electric arc to advancing arc mouth department, and make the electric arc increase after the cutting is elongated and the area of contact of outside air, be favorable to cooling electric arc, promote arc extinguishing ability.

In order to realize that a plurality of arc extinguishing bars 5 are about staggered arrangement in explosion chamber 3, be provided with the multiunit bar slot 31 that is used for installing a plurality of arc extinguishing bars 5 on the both sides inner wall of explosion chamber 3 relatively, multiunit bar slot 31 is about staggered arrangement along a plurality of arc extinguishing bars 5's array orientation to correspond a plurality of arc extinguishing bars 5 and set up in multiunit bar slot 31 can.

In this embodiment, the upper cover plate 1 and the lower cover plate 2 are provided with two inclined plane bosses 11 opposite to each other at the rear end of the arc extinguish chamber 3, the rear end of the arc extinguish chamber 3 is formed with a guide inclined opening formed by the two inclined plane bosses 11 to connect the exhaust chamber 4, arc extinguishing gas is smoothly discharged into the exhaust chamber 4, two groups of arc guide pillar structures 41 are provided on the front and rear sides of the exhaust chamber, the deionization mesh 6 is a double-layer metal mesh installed between the two rows of arc guide pillar structures 41 in a limiting manner, the double-layer metal mesh is composed of two layers of wire mesh structures, the structure is arranged such that the deionization mesh 6 is installed in the exhaust chamber in a limiting manner by the two rows of arc guide pillar structures 41, so that the dissociative gas entering the exhaust chamber passes through a plurality of meshes on the double-layer metal mesh, the dissociative metal ions are more easily adsorbed by the double-layer metal mesh, and are then are deionized twice, thereby achieving the effect of absorbing and eliminating free gas and avoiding the phenomenon of arcing.

As shown in fig. 2-3, two sets of arc striking post structures 41 include a plurality of arc striking posts that set up at intervals in proper order to be formed with a plurality ofly between a plurality of arc striking posts exhaust duct 9, exhaust duct 9 interval shaping is in on the rear side wall of exhaust chamber, a plurality of exhaust ducts 9 constitute by the clearance between a plurality of arc striking posts promptly, the arc striking post has the orientation the arc surface in arc extinguishing chamber, and the free gas and the electric arc of discharging in the explosion chamber 3 are a plurality of enter into exhaust chamber 4 after the reposition of redundant personnel of arc striking post, and rethread metal mesh sheet structure disappears freely and the arc extinguishing effect, finally effectively extinguishes electric arc in explosion chamber 3, can play better arc extinguishing effect to exchange, the circuit of direct current to promote the disjunction ability of circuit breaker.

In order to reliably realize that the installation of upper cover plate 1 and lower apron 2 is fixed, the both sides of upper cover plate 1 and lower apron 2 are provided with two sets of installation boss 12 relatively respectively, and press from both sides tight cover respectively and establish two installation cutting ferrule 13 on two sets of installation boss 12, and fasten respectively and wear to establish the fastening components between two installation cutting ferrule 13 and two sets of installation boss 12, fastening components is preferably bolt assembly, when the equipment, presss from both sides two sets of installation boss 12 through installation cutting ferrule 13 earlier and tightly aligns respectively to take place the pine phenomenon to prevent between upper cover plate 1 and the lower apron 2, then firmly fix together installation cutting ferrule 13 and installation boss 12 through fastening components, just so realize that the relative mounted position between upper cover plate and the lower apron is fixed, the cooperation is fixed reliable, simple to operate is swift.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. The utility model provides an explosion chamber structure of universal circuit breaker, includes by upper cover plate (1) and lower apron (2) to closing fixed explosion chamber (3) that forms, and connects exhaust chamber (4) of explosion chamber (3) rear end, and set up a plurality of air discharge ducts (9) of exhaust chamber (4) rear lateral wall, interval arrangement is provided with a plurality of arc extinguishing bars piece (5) in explosion chamber (3), be provided with the free net piece (6) of disappearing of at least one deck in exhaust chamber (4), explosion chamber (3) front end is equipped with into arc mouth, its characterized in that: arc extinguishing bars piece (5) orientation one side of advancing the arc mouth is provided with the arc incision (8) of leading that is shrunk gradually by notch to tank bottom, it is skew to lead arc incision (8) central line setting on arc extinguishing bars piece (5) width direction, explosion chamber (3) one side is provided with and extends to the arc striking piece structure (7) of advancing arc mouth department, a plurality of arc extinguishing bars piece (5) are in along its array orientation staggered interval arrangement in proper order about in explosion chamber (3) to make a plurality of arc incisions (8) of leading on a plurality of arc extinguishing bars piece (5) along array orientation be in staggered interval arrangement in proper order about in explosion chamber (3).

2. Arc chute structure of a universal circuit breaker according to claim 1, characterized in that: run on arc piece structure (7) and set up through location structure between upper cover plate (1) and lower apron (2), it includes and is on a parallel with flat piece portion (71) that arc extinguishing bars piece (5) set up to and extend by flat piece portion (71) half surround in advance the kink of arc mouth department.

3. Arc chute structure of a universal circuit breaker according to claim 2, characterized in that: the positioning structure includes: correspond respectively and set up two lines grooves (32) that are used for the location to connect at upper cover plate (1) and apron (2) one side down, and set up the location fixture block (73) of flat portion (71) both sides with correspond the location draw-in groove that sets up in two lines grooves (32) and with location fixture block (73) cooperation joint.

4. Arc chute structure of a universal circuit breaker according to any of claims 1 to 3, characterized in that: lead arc incision (8) and be the V-arrangement structure, it is including setting up horn mouth (81) that reduce gradually in arc extinguishing bars piece (5) one side and bore outside-in to and V-arrangement groove (82) that link to each other with horn mouth (81), and arc groove (83) of setting at V-arrangement groove (82) tip.

5. Arc chute structure of a universal circuit breaker according to claim 4, characterized in that: the arc extinguishing chamber is characterized in that a plurality of groups of strip-shaped slots (31) used for mounting a plurality of arc extinguishing grid pieces (5) are oppositely arranged on the inner walls of two sides of the arc extinguishing chamber (3), and the plurality of groups of strip-shaped slots (31) are arranged in a left-right staggered mode along the arrangement direction of the arc extinguishing grid pieces (5).

6. Arc chute structure of a universal circuit breaker according to claim 5, characterized in that: upper cover plate (1) correspond with lower cover plate (2) be provided with two inclined plane bosss (11) relative in explosion chamber (3) rear end, explosion chamber (3) rear end forms constitutes with connecting by two inclined plane bosss (11) the direction bevel connection of exhaust chamber (4).

7. Arc chute structure of a universal circuit breaker according to claim 6, characterized in that: two groups of arc striking column structures (41) are arranged on the front side and the rear side of the exhaust chamber, and the dissociation eliminating net piece (6) is a double-layer metal net piece which is arranged between the two rows of arc striking column structures (41) in a limiting mode.

8. Arc chute structure of a universal circuit breaker according to claim 7, characterized in that: the two groups of arc striking column structures (41) comprise a plurality of arc striking columns which are sequentially arranged at intervals, a plurality of exhaust grooves (9) are formed between the plurality of arc striking columns, and the plurality of exhaust grooves (9) are sequentially arranged on the two groups of arc striking column structures (41) in a staggered mode.

9. Arc chute structure of a universal circuit breaker according to claim 1, characterized in that: two sides of the upper cover plate (1) and the lower cover plate (2) are relatively provided with two sets of mounting bosses (12), two mounting clamping sleeves (13) which are respectively sleeved on the two sets of mounting bosses (12) in an extruding way, and fastening components which are respectively fastened and penetrated between the two mounting clamping sleeves and the two sets of mounting bosses.