CN219513037U

CN219513037U - Arc isolation cover structure for double-breakpoint circuit breaker

Info

Publication number: CN219513037U
Application number: CN202223306098.2U
Authority: CN
Inventors: 叶晓丽; 赵瑞峰
Original assignee: Shanghai Renmin Electrical Apparatus Works Co Ltd
Current assignee: Shanghai Renmin Electrical Apparatus Works Co Ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-08-11
Anticipated expiration: 2032-12-07

Abstract

The utility model relates to an arc isolation cover structure for a double-breakpoint circuit breaker, which comprises an arc isolation cover and a bottom plate (3), wherein the arc isolation cover is arranged on the bottom plate (3), the arc isolation cover is arranged at a wire outlet end and a wire inlet end at two ends of the circuit breaker, the arc isolation cover comprises an upper arc isolation cover (1) and a lower arc isolation cover (2), and the upper arc isolation cover (1) and the lower arc isolation cover (2) are spliced to form a complete arc isolation cover structure. The arc isolation cover is spliced together by the upper arc isolation cover and the lower arc isolation cover, is arranged at the outlet end and the inlet end of the circuit breaker, and selects whether the arc isolation plate needs to be arranged or not according to the position of the arc outlet, and has a simple structure and convenient installation.

Description

Arc isolation cover structure for double-breakpoint circuit breaker

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to an arc isolation cover structure for a double-breakpoint circuit breaker.

Background

As is known in the art, the function of a low-voltage circuit breaker is to break, i.e. to cut off, a fault current, in particular when the moving contacts of the contact system of the low-voltage circuit breaker are separated with respect to the stationary contacts. Further, as is known in the art, when a moving contact is separated from a fixed contact to break a fault current, an arc is generated in an arc extinguishing chamber and is ejected outward from an air outlet of the arc extinguishing chamber, and since the ejected arc causes problems such as phase-to-phase breakdown and ablation of parts, an arc-isolating cover for reducing or even avoiding the problems is generally installed outside the circuit breaker. The arc isolation cover is generally made of insulating materials and is connected with the circuit breaker body in a clamping manner, so that risks of inter-phase breakdown and the like of the circuit breaker are prevented.

Although the arc isolation cover made of the insulating material can play a good role in eliminating electric arcs and improving the insulation grade of the circuit breaker, whether the arc isolation cover is reasonable in structure or not has a corresponding effect on the insulation protection grade, the installation difficulty and the like of the circuit breaker. In the prior art, a circuit breaker with a rotary double-breakpoint structure is provided with two air outlets, the air outlet of a wire inlet end is positioned above a wire connection row, the air outlet of a wire outlet end is positioned below the wire connection row, and the separating shield cannot meet the requirement that the positions of the two air outlets of the circuit breaker with the rotary double-breakpoint are inconsistent.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide an arc isolation cover structure for a double-breakpoint circuit breaker, which adopts an upper arc isolation cover and a lower arc isolation cover which are spliced together and are arranged at the outlet end and the inlet end of the circuit breaker, and whether an arc isolation plate needs to be arranged or not is selected according to the position of an arc outlet.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides an separate arc cover structure for two breakpoint circuit breakers, includes separates arc cover and bottom plate, separate the arc cover and install on the bottom plate, separate arc cover setting in the play line end and the inlet wire end department at circuit breaker both ends, separate the arc cover and separate the arc cover including last arc cover and lower, go up to separate the arc cover and separate the arc cover concatenation with lower and form complete arc cover structure that separates.

Further, a groove A for installing the arc-isolating plate is formed in the upper arc-isolating cover, and a groove B for installing the arc-isolating plate is formed in the lower arc-isolating cover.

Further, when the arc barrier is installed in the groove A of the upper arc barrier cover, the arc outlet at the wire inlet end of the circuit breaker is positioned above the wiring row.

Further, when the arc barrier is installed in the groove B of the lower arc barrier cover, the arc outlet of the outlet end of the circuit breaker is positioned below the wiring row.

Further, two sides of the upper end of the flash barrier are provided with bending plate pieces, grooves matched with the grooves A and the grooves B are formed between the bending plate pieces and the flash barrier main body, and the bending plate pieces are arranged in the grooves to limit the flash barrier in the grooves A and the grooves B.

Further, a plurality of holes B are symmetrically arranged on two sides of the lower arc isolation cover.

Further, the holes A correspond to a plurality of nuts arranged on the bottom plate, and the lower arc isolation cover is fastened and connected with the bottom plate through screws.

Further, through holes A are symmetrically formed in two sides of the upper arc isolation cover, through holes B are correspondingly formed in the lower arc isolation cover, and nuts are correspondingly arranged on the bottom plate.

Further, the upper arc isolation cover, the lower arc isolation cover and the bottom plate are connected with the nut through the through hole A and the through hole B by screws.

Further, holes A are symmetrically formed in two sides of the upper arc isolation cover, mounting holes are correspondingly formed in the circuit breaker, and the upper arc isolation cover is fixed to the circuit breaker through the holes A and the mounting holes through screws.

Compared with the prior art, the utility model has the following advantages: the arc isolation cover is divided into an upper arc isolation cover and a lower arc isolation cover, the arc isolation covers are spliced together and are installed at the outlet end and the inlet end of the circuit breaker, whether the arc isolation plate needs to be installed or not is selected through the position of the arc outlet, accessories in the arc isolation cover can be adjusted according to actual operation conditions, the flexibility is strong, the structure is simple, and the installation is convenient.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of an explosive structure according to the present utility model;

FIG. 3 is a schematic view of an upper arc shield of the present utility model;

FIG. 4 is a schematic view of another embodiment of the upper arc shield of the present utility model;

fig. 5 is a schematic structural view of the lower arc isolation cover of the present utility model.

FIG. 6 is a schematic view of another embodiment of the lower arc shield of the present utility model;

fig. 7 is a schematic structural view of the circuit breaker of the present utility model;

FIG. 8 is a schematic view of the structure of the upper arc shield mounting arc shield of the present utility model;

FIG. 9 is a schematic view of the structure of the lower arc shield mounting arc shield of the present utility model;

FIG. 10 is a schematic view of the structure of the arc shield in the upper arc shield of the present utility model;

FIG. 11 is a schematic view of the structure of the arc shield in the lower arc shield of the present utility model.

In the figure: 1. upper arc-isolating cover 11, through holes a,12, holes a,13, grooves a,2, lower arc-isolating cover 21, through holes B,22, holes B,23, grooves B,3, bottom plate, 41, mounting holes, 5, and nuts.

Detailed Description

The utility model will now be described in detail with reference to the drawings and specific examples.

As shown in fig. 1, an arc isolation cover structure for a double-breakpoint circuit breaker comprises an arc isolation cover and a bottom plate 3, wherein the arc isolation cover is arranged on the bottom plate 3, the arc isolation cover is arranged at a wire outlet end and a wire inlet end of two ends of the circuit breaker, the arc isolation cover comprises an upper arc isolation cover 1 and a lower arc isolation cover 2, and the upper arc isolation cover 1 and the lower arc isolation cover 2 are spliced to form a complete arc isolation cover structure.

As shown in fig. 5, a plurality of holes B22 are symmetrically arranged on two sides of the lower arc isolation cover 2, the holes B22 correspond to a plurality of nuts 5 arranged on the bottom plate 3, and the lower arc isolation cover 2 and the bottom plate 3 are fastened and connected through screws in the installation process and are installed at two ends of the circuit breaker. As shown in fig. 3, through holes a11 are symmetrically formed in two sides of the upper arc isolation cover 1, a through hole B21 is correspondingly formed in the lower arc isolation cover 2, a nut 5 is correspondingly arranged on the bottom plate 3, after the wiring of the circuit breaker wiring row is completed, the upper arc isolation cover 1, the lower arc isolation cover 2 and the bottom plate 3 are connected through the through holes a11, the through holes B21 and the nuts 5 are connected through screws, and the splicing of the two arc isolation covers of the upper arc isolation cover 1 and the lower arc isolation cover 2 is achieved. As shown in fig. 3 and 7, holes a12 are symmetrically formed on two sides of the upper arc isolation cover 1, mounting holes 41 are correspondingly formed on the circuit breaker, and the upper arc isolation cover 1 is fixed on the circuit breaker through the holes a12 and the mounting holes 41 by screws. The arc isolation cover is divided into an upper arc isolation cover and a lower arc isolation cover, the arc isolation covers are spliced together and are installed on the outlet end and the inlet end of the circuit breaker, the upper arc isolation cover 1 is screwed through a plurality of bolts, the lower arc isolation cover 2, the bottom plate 3 and the circuit breaker are connected together, and the arc isolation cover is high in flexibility and convenient to assemble and disassemble.

As shown in fig. 4 and 6, the upper arc-isolating cover 1 is provided with a groove A13 for installing an arc-isolating plate, the lower arc-isolating cover 2 is provided with a groove B23 for installing an arc-isolating plate, the arc-isolating plate is provided with bending plates on two sides of the upper end of the arc-isolating plate, grooves matched with the groove A (13) and the groove B (23) are arranged between the bending plates and the arc-isolating plate main body, and the bending plates are arranged in the grooves to limit the arc-isolating plate in the groove A (13) and the groove B (23). Whether the arc baffle plate needs to be installed or not is selected according to the position of the arc outlet, and accessories in the arc baffle cover can be adjusted according to actual operation conditions.

Example 1

The circuit breaker of rotatory double break point structure has two gas outlets, and the gas outlet of inlet wire end is located the top of wiring row, and the gas outlet of outlet wire end is located the below of wiring row, and when the position of the inlet wire end gas outlet of circuit breaker of rotatory double break point structure was in the top of wiring row, as shown in fig. 8, install the arc barrier in the slot A13 of upper arc isolation cover 1 to the passageway that the electric arc probably escaped has been stopped up, interphase breakdown risk has been eliminated.

Example 2

The circuit breaker of the rotary double-breakpoint structure is provided with two air outlets, the air outlet of the wire inlet end is positioned above the wiring row, the air outlet of the wire outlet end is positioned below the wiring row, and when the position of the air outlet of the wire outlet of the circuit breaker of the rotary double-breakpoint structure is positioned below the wiring row, as shown in fig. 9, an arc barrier is arranged in a groove B23 of the lower arc barrier cover 2, so that a channel which can possibly escape from an electric arc is blocked, and the risk of inter-phase breakdown is eliminated.

The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.

Claims

1. The utility model provides an separate arc cover structure for two breakpoint circuit breakers, includes separates arc cover and bottom plate (3), separate the arc cover and install on bottom plate (3), its characterized in that, separate the arc cover setting in the play line end and the inlet wire end department at circuit breaker both ends, separate the arc cover and separate arc cover (2) including last arc cover (1) and lower, go up to separate arc cover (1) and lower arc cover (2) concatenation and form complete arc cover structure that separates.

2. The arc isolating cover structure for the double-breakpoint circuit breaker according to claim 1, wherein the upper arc isolating cover (1) is provided with a groove A (13) for installing an arc isolating plate, and the lower arc isolating cover (2) is provided with a groove B (23) for installing the arc isolating plate.

3. The arc shield structure for a double breakpoint circuit breaker according to claim 2, wherein the circuit breaker inlet arc outlet is located above the wiring block when the arc shield is installed in the groove a (13) of the upper arc shield (1).

4. The arc shield structure for a double breakpoint circuit breaker according to claim 2, wherein the circuit breaker outlet arc outlet is located below the wiring block when the arc shield is installed in the groove B (23) of the lower arc shield (2).

5. The arc shield structure for the double-breakpoint circuit breaker according to claim 2, wherein two sides of the upper end of the arc shield are provided with bending plates, grooves matched with the grooves A (13) and the grooves B (23) are formed between the bending plates and the arc shield main body, and the bending plates are arranged in the grooves to limit the arc shield in the grooves A (13) and the grooves B (23).

6. The arc isolating cover structure for the double-breakpoint circuit breaker according to claim 1, wherein a plurality of holes B (22) are symmetrically arranged on two sides of the lower arc isolating cover (2).

7. The arc shield structure for the double breakpoint circuit breaker according to claim 6, wherein the hole B (22) corresponds to a plurality of nuts (5) provided on the bottom plate (3), and the lower arc shield (2) is fastened to the bottom plate (3) by screws.

8. The arc isolation cover structure for the double-breakpoint circuit breaker according to claim 1, wherein through holes A (11) are symmetrically formed in two sides of the upper arc isolation cover (1), through holes B (21) are correspondingly formed in the lower arc isolation cover (2), and nuts (5) are correspondingly arranged on the bottom plate (3).

9. The arc shield structure for the double breakpoint circuit breaker according to claim 8, wherein the upper arc shield (1), the lower arc shield (2) and the bottom plate (3) are connected by a through hole a (11), a through hole B (21) and a nut (5) by screws.

10. The arc isolating cover structure for the double-breakpoint circuit breaker according to claim 1, wherein holes A (12) are symmetrically formed in two sides of the upper arc isolating cover (1), mounting holes (41) are correspondingly formed in the circuit breaker, and the upper arc isolating cover (1) is fixed to the circuit breaker through the holes A (12) and the mounting holes (41) through screws.