CN216389249U

CN216389249U - Arc extinguish chamber structure of low-voltage plastic shell type circuit breaker

Info

Publication number: CN216389249U
Application number: CN202122942422.9U
Authority: CN
Inventors: 王健
Original assignee: Lexing Electric Wuxi Co ltd
Current assignee: Lexing Electric Wuxi Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-04-26
Anticipated expiration: 2031-11-26

Abstract

The utility model discloses an arc extinguish chamber structure of a low-voltage plastic shell type circuit breaker, and particularly relates to the technical field of circuit breaker structures, which comprises grid pieces and two grid piece supports, wherein the two grid piece supports are symmetrically arranged on two sides of each grid piece, the left side and the right side of each grid piece are symmetrically connected with grid piece supporting legs, inserting grooves with the same number as the grid pieces are arranged in the grid piece supports at equal intervals, the top ends of the outer side surfaces of the grid piece supporting legs on the two sides of each grid piece are symmetrically provided with limiting grooves, one side surface of the inserting groove on the two sides of each grid piece support is uniformly connected with a limiting cylinder, and the other side surface of the inserting groove on the two sides of each grid piece support is uniformly connected with a shrinkage gasket. According to the utility model, the height of the grid piece support is increased, the number of the grid pieces is increased, the electric arc generated in short circuit is divided into more short arcs connected in series, the electric arc resistance is increased, the electric arc voltage is reduced, the electric arc can be extinguished more quickly, and thus the product performance is improved.

Description

Arc extinguish chamber structure of low-voltage plastic shell type circuit breaker

Technical Field

The utility model relates to the technical field of circuit breaker structures, in particular to an arc extinguish chamber structure of a low-voltage plastic shell type circuit breaker.

Background

The low-voltage circuit breaker is a component of low-voltage electrical equipment with a large capacity, is mainly used in an industrial power system, and can ensure the connection and disconnection of a circuit under rated load and automatically disconnect the circuit in case of an abnormal state of the circuit. When fault current occurs in a circuit and the current value exceeds a certain protection setting range, moving and static contacts in the circuit breaker can be quickly opened, electric arcs are generated between the contacts, an arc extinguishing device is usually arranged in the moving direction of the electric arcs, the electric arcs can be slightly stagnated when being generated, the electric arcs move to a group of arc isolating grid pieces along arc striking pieces under the influence of a magnetic field and aerodynamic force in the arc extinguishing device and are divided into a plurality of short arcs by a plurality of grid pieces, the electric arcs are reduced, the voltage is rapidly increased, and the electric arcs are extinguished.

The arc extinguish chamber structure bars in the current circuit breaker are few in number, can not be effectual striking and cutting electric arc, when through great short-circuit current, can not in time extinguish arc to cause the circuit breaker to damage, cause certain economic loss. In view of this, it is necessary to invent an arc extinguishing chamber structure of a low voltage plastic case type circuit breaker.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides an arc extinguish chamber structure of a low-voltage plastic shell type circuit breaker, which aims to solve the problems that the existing circuit breaker in the prior art has fewer grid sheets, can not effectively strike and cut electric arcs and can not timely extinguish arcs when large short-circuit current passes through the circuit breaker.

In order to achieve the above purpose, the utility model provides the following technical scheme: the arc extinguish chamber structure of the low-voltage plastic shell type circuit breaker comprises grid pieces and two grid piece supports, wherein the two grid piece supports are symmetrically arranged at two sides of the grid pieces, a plurality of grid pieces are longitudinally arranged at equal intervals to form grid piece groups, the left side and the right side of each grid piece are symmetrically connected with grid piece supporting legs, the grid and the grid support legs are of an integrated structure, the grid support is internally provided with inserting grooves with the same number as the grids at equal intervals, the size of the inserting groove is larger than that of the grid supporting legs, the top end of the outer side surface of the grid supporting legs at the two sides of each grid is symmetrically provided with a limiting groove, one side surface of the inserting groove at the two sides of the grid support is integrally connected with a limiting cylinder, the diameter of the limiting cylinder is smaller than that of the limiting groove, the other side of the splicing groove on the two sides of the grid support is uniformly connected with a contraction gasket, and the cross section of the contraction gasket is trapezoidal.

In a preferred embodiment, first limiting lugs are symmetrically installed at the middle positions of the left side and the right side of the grid piece, the first limiting lugs and the grid piece are of an integrally formed structure, a plurality of first grid grooves are formed in the left side and the right side of the grid piece support at equal intervals, the first limiting lugs correspond to the first grid grooves in the left-right direction, the length of the first grid grooves is larger than that of the first limiting lugs, the thickness of the first limiting lugs is the same as that of the first grid grooves, and the first limiting lugs are inserted into the first grid grooves when in use, so that a limiting effect is achieved.

In a preferred embodiment, the lower ends of the left side and the right side of the grid piece are symmetrically provided with two limiting lugs, the two limiting lugs and the grid piece are of an integrally formed structure, the bottom ends of the left side and the right side of the grid piece support are provided with a plurality of second grid grooves at equal intervals, the two limiting lugs correspond to the second grid grooves in a left-right mode, and one side of the two limiting lugs is attached to one side of the second grid grooves during use, so that a limiting effect is achieved.

In a preferred embodiment, the cross section of the first limiting projection is triangular, and the outer side of the first limiting projection is formed into a round angle, so that the first limiting projection can be conveniently inserted into the first grid separating groove, and the grid sheet is symmetrically provided with outer grooves on both sides of the first limiting projection.

In a preferred embodiment, the inner sides of the grid legs integrally connected to each grid are rounded so that the grid legs can be more easily inserted into the insertion grooves.

In a preferred embodiment, both grid supports are made of an insulating material to limit arcing.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the grid pieces and the grid piece supports are arranged, the number of the grid pieces is increased by increasing the height of the grid piece supports, the electric arc generated in short circuit is divided into more short arcs connected in series, the electric arc resistance is increased, the electric arc voltage is reduced, and the electric arc can be extinguished more quickly, so that the short circuit current bearing capacity of the circuit breaker is improved, and the product performance is improved;

2. according to the utility model, the limiting groove, the limiting cylinder, the limiting projection I, the grid groove I, the limiting projection II and the grid groove II are arranged, wherein the limiting groove is matched with the limiting cylinder, the limiting projection I is matched with the grid groove I, and the limiting projection II is matched with the grid groove II, so that the grid sheet support is limited and fixed from multiple positions, the grid sheet is ensured not to fall off in the use process, and the stability of the grid sheet support is improved.

Drawings

For a clearer explanation of the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a first general structural diagram of the present invention;

FIG. 3 is a second overall view of the present invention;

FIG. 4 is a first schematic structural diagram of a grid support according to the present invention;

FIG. 5 is a second schematic structural view of a grid support according to the present invention;

fig. 6 is a schematic structural diagram of a gate of the present invention.

Description of reference numerals:

1. a grid sheet; 2. a grid support; 3. grid support legs; 4. inserting grooves; 5. a limiting groove; 6. a limiting cylinder; 7. a first limiting bump; 8. a first grid isolation groove; 9. a second limiting bump; 10. a second grid isolation groove; 11. an outer groove; 12. and (4) shrinking the gasket.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. 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.

Referring to the attached drawings 1-6 of the specification, the arc extinguish chamber structure of the low-voltage plastic shell type circuit breaker of the embodiment comprises grid pieces 1 and two grid piece supports 2, wherein the two grid piece supports 2 are symmetrically arranged at two sides of the grid pieces 1, a plurality of grid pieces 1 are longitudinally arranged at equal intervals to form a grid piece group, the two grid piece supports 2 are made of insulating materials and used for limiting electric arcs, the number of the grid pieces 1 is 10, the left side and the right side of each grid piece 1 are symmetrically connected with grid piece supporting legs 3, the inner sides of the grid piece supporting legs 3 integrally connected with each grid piece 1 are all designed into round corners, so that the grid piece supporting legs 3 can be more conveniently inserted into inserting grooves 4, the grid piece supporting legs 3 mainly play a role in enhancing an arc blowing magnetic field, after the insulated grid piece supports 2 are inserted, the magnetization effect of the grid piece supporting legs 3 is not influenced, but the erosion effect of the high temperature of the electric arcs on the grid piece supporting legs 3 is isolated, the production of metal steam is inhibited, the breaking performance of the circuit breaker is favorably improved, the grid pieces 1 and the grid piece supporting legs 3 are of an integrally formed structure, inserting grooves 4 with the same number as the grid pieces 1 are formed in the grid piece support 2 at equal intervals, the size of each inserting groove 4 is larger than that of each grid piece supporting leg 3, each inserting groove 4 is matched with a limiting cylinder 6 and a contraction gasket 12 to limit and fix the grid piece supporting legs 3, the top ends of the outer side surfaces of the grid piece supporting legs 3 on the two sides of each grid piece 1 are symmetrically provided with limiting grooves 5, one side surface of each inserting groove 4 on the two sides of the grid piece support 2 is integrally connected with the limiting cylinder 6, the diameter of each limiting groove 5 is 1.2mm, the diameter of each limiting cylinder 6 is 1.0mm, the diameter of each limiting cylinder 6 is smaller than that of each limiting groove 5, the other side surfaces of the inserting grooves 4 on the two sides of the grid piece support 2 are integrally connected with the contraction gaskets 12, the cross section of the shrink-fit gasket 12 is trapezoidal.

The implementation scenario is specifically as follows: according to the utility model, by increasing the height of the grid plate bracket 2 and increasing the number of the grid plates 1, the electric arc generated in short circuit is divided into more short arcs connected in series, the electric arc resistance is increased, the electric arc voltage is reduced, the electric arc can be extinguished more quickly, the arc extinguishing is quick and thorough, the filtering, cooling and heat dissipation are sufficient, the breaking performance of the low-voltage circuit breaker is improved, the harmful influence on the circuit breaker and human bodies when the electric arc flees outwards is eliminated, and the product performance is improved.

Referring to the attached drawings 4-6 of the specification, in the arc extinguish chamber structure of the low-voltage plastic shell type circuit breaker of the embodiment, the first limiting lugs 7 are symmetrically installed at the middle positions of the left side and the right side of the grid plate 1, the cross section of each first limiting lug 7 is triangular, the outer sides of the first limiting lugs 7 are rounded, so that the first limiting lugs 7 can be conveniently inserted into the first grid grooves 8, the grid plate 1 is symmetrically provided with outer grooves 11 at the two sides of each first limiting lug 7, the first limiting lugs 7 and the grid plate 1 are in an integrally formed structure, the left side and the right side of the grid plate support 2 are equally spaced and provided with a plurality of first grid grooves 8, the first limiting lugs 7 correspond to the first grid grooves 8 in a left-right mode, the length of the first grid grooves 8 is greater than that of the first limiting lugs 7, the thickness of the first limiting lugs 7 is the same as that of the first grid grooves 8, and the first limiting lugs 7 are inserted into the first grid grooves 8 when in use, realize spacing effect, two 9 spacing lugs are all installed to the equal symmetry of the left and right sides lower extreme of bars piece 1, two 9 spacing lugs are the integrated into one piece structure with bars piece 1, a plurality of barrier groove two 10 have been seted up to the impartial interval in the left and right sides bottom of bars piece support 2, two 9 spacing lugs correspond about with barrier groove two 10, and one side of two 9 spacing lugs is laminated with one side of two 10 barrier grooves mutually when using, realizes spacing effect.

The implementation scenario is specifically as follows: according to the utility model, the first limiting bump 7, the first grid groove 8, the second limiting bump 9 and the second grid groove 10 are arranged, wherein the first limiting bump 7 is matched with the first grid groove 8, and the second limiting bump 9 is matched with the second grid groove 10, so that the grid sheet support 2 is limited and fixed from multiple positions, the grid sheet 1 is ensured not to fall off in the use process, and the stability of the grid plate is improved.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the utility model, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the utility model can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. Arc extinguish chamber structure of low pressure plastic case formula circuit breaker, including bars piece (1) and two bars piece support (2), its characterized in that: the two grid plate supports (2) are symmetrically arranged on two sides of a grid plate (1), a plurality of grid plates (1) are longitudinally arranged at equal intervals to form a grid plate group, grid plate supporting legs (3) are symmetrically connected to the left side and the right side of each grid plate (1), the grid plates (1) and the grid plate supporting legs (3) are of an integrally formed structure, inserting grooves (4) with the same number as the grid plates (1) are formed in the grid plate supports (2) at equal intervals, the size of each inserting groove (4) is larger than that of each grid plate supporting leg (3), limiting grooves (5) are symmetrically formed in the top ends of the outer side surfaces of the grid plate supporting legs (3) on two sides of each grid plate (1), one side surface of each inserting groove (4) on two sides of each grid plate support (2) is integrally connected with a limiting cylinder (6), and the diameter of each limiting cylinder (6) is smaller than that of each limiting groove (5), the other side surfaces of the inserting grooves (4) on the two sides of the grid support (2) are integrally connected with a contraction gasket (12), and the cross section of the contraction gasket (12) is trapezoidal.

2. Arc chute structure of a low-voltage plastic case circuit breaker according to claim 1, characterized in that: spacing lug (7) are installed to the equal symmetry in left and right sides intermediate position of bars piece (1), spacing lug (7) and bars piece (1) are the integrated into one piece structure, a plurality of barrier groove (8) have been seted up to the impartial interval in the left and right sides of bars piece support (2), correspond about spacing lug (7) and barrier groove (8), the length that separates barrier groove (8) is greater than the length of spacing lug (7), the thickness of spacing lug (7) is the same with the thickness in barrier groove (8).

3. Arc chute structure of a low-voltage plastic case circuit breaker according to claim 1, characterized in that: two (9) spacing lugs are symmetrically installed at the lower ends of the left side and the right side of the grid piece (1), the two (9) spacing lugs and the grid piece (1) are of an integrally formed structure, a plurality of second grid grooves (10) are arranged at equal intervals at the bottom ends of the left side and the right side of the grid piece support (2), and the two (9) spacing lugs correspond to the second grid grooves (10) in the left side and the right side.

4. Arc chute structure of a low-voltage plastic case circuit breaker according to claim 2, characterized in that: the cross section of the first limiting lug (7) is triangular, the outer side of the first limiting lug (7) is designed into a round angle, and the two sides of the first limiting lug (7) of the grid sheet (1) are symmetrically provided with outer grooves (11).

5. Arc chute structure of a low-voltage plastic case circuit breaker according to claim 1, characterized in that: the inner sides of the grid plate supporting legs (3) which are integrally connected with each grid plate (1) are all provided with round corners.

6. Arc chute structure of a low-voltage plastic case circuit breaker according to claim 1, characterized in that: the two grid plate supports (2) are both made of insulating materials.