CN212848248U

CN212848248U - Shell structure of auxiliary switch of circuit breaker

Info

Publication number: CN212848248U
Application number: CN202021594299.5U
Authority: CN
Inventors: 周焰华; 张志荣; 吴双龙
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-03-30
Anticipated expiration: 2030-08-04

Abstract

The utility model relates to a circuit breaker auxiliary switch's shell structure, a side distribution of casing has the exhaust hole. Compared with the prior art, the utility model discloses a set up the exhaust hole on auxiliary switch's casing, can make the inside cooling of casing through the convection current with the outside air when the electric spark produces, extinguish the electric spark to avoid its damage to auxiliary switch, improved stability and the security of using.

Description

Shell structure of auxiliary switch of circuit breaker

Technical Field

The utility model belongs to the technical field of the low voltage circuit breaker and specifically relates to a circuit breaker auxiliary switch's shell structure is related to.

Background

The existing auxiliary switch shell of the circuit breaker is generally in a totally enclosed structure. In practical use, the moving contact and the fixed contact in the auxiliary switch may generate electric sparks when the auxiliary switch is turned on or off, so that the auxiliary switch is damaged. Especially, the auxiliary switch used in the dc circuit breaker has a very high frequency of occurrence, thereby seriously affecting the normal operation of the auxiliary switch.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a circuit breaker auxiliary switch's shell structure in order to overcome the defect that above-mentioned prior art exists, avoid the emergence of spark between moving contact and the static contact, improve stability in use and security.

The purpose of the utility model can be realized through the following technical scheme:

a shell structure of an auxiliary switch of a circuit breaker is provided, wherein exhaust holes are distributed on one side surface of the shell.

Furthermore, the position of the exhaust hole corresponds to the contact position of the movable contact and the fixed contact in the auxiliary switch.

Furthermore, the exhaust holes are through holes arranged in a matrix form.

Further, each exhaust hole is covered with a mesh plate.

Furthermore, the grid plate and the exhaust hole are detachably connected.

Further, each exhaust hole is rectangular, circular or regular polygonal.

Further, the exhaust hole comprises a first outlet arranged on the inner side of the shell and a second outlet arranged on the outer side of the shell, and the first outlet is larger than the second outlet.

Furthermore, the shell in be equipped with the baffle, vertically be located the one side of sound contact, baffle and shell form the isolation chamber, are equipped with the air discharge duct on the baffle.

Furthermore, the shell comprises a base and a cover plate, and the base and the cover plate are connected through riveting.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a set up the exhaust hole on auxiliary switch's casing, can make the inside cooling of casing through the convection current with the outside air when the electric spark produces, extinguish the electric spark to avoid its damage to auxiliary switch, improved stability and the security of using.

2. The position of the exhaust hole corresponds to the contact position of the movable static contact in the auxiliary switch, so that the efficiency of air convection can be improved, and the number of the exhaust holes is reduced.

3. Set up the net board that can dismantle or the integral type in exhaust hole department, can reduce the entering of inside dust, improve the intensity of exhaust hole department casing simultaneously.

4. The vent hole is formed as a tapered hole having a first outlet larger than a second outlet, which facilitates the circulation of air while reducing the actual opening size of the vent hole.

5. The partition plate with the exhaust groove is arranged in the shell, and the partition plate and the side wall of the shell form an isolation cavity, so that electric sparks are cooled through the exhaust hole and the exhaust groove, and the safety is further improved.

6. The casing is connected through the riveting by base and apron and forms, can install through riveting machine one shot forming, replaces current bolted connection, effectively improves assembly efficiency.

Drawings

Fig. 1 is a schematic structural diagram of the first embodiment.

Fig. 2 is a schematic structural diagram of the second embodiment.

Fig. 3 is a schematic structural diagram of the third embodiment.

FIG. 4 is a schematic sectional view of an exhaust hole according to the third embodiment.

Fig. 5 is a schematic structural diagram of a fourth embodiment.

Description of the drawings: 1. the device comprises a shell, 11, a base, 12, a cover plate, 2, an exhaust hole, 21, a first outlet, 22, a second outlet, 3, a network plate, 31, an exhaust groove, 4, an isolation cavity, 5 and a grid plate.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example one

As shown in fig. 1, the present embodiment provides a housing structure of an auxiliary switch of a circuit breaker, which is applied to the auxiliary switch of the circuit breaker. The auxiliary switch in this embodiment includes casing 1, movable contact subassembly and stationary contact subassembly, and the movable contact subassembly setting wherein is in the central authorities of casing 1, and the stationary contact group distributes in the both sides of movable contact group, and its concrete structure can refer to the chinese utility model with publication number CN205621687U, and the repeated description is not carried out in this paper. Therefore, in order to make the position of the exhaust hole 2 correspond to the contact position of the movable contact and the stationary contact in the auxiliary switch, in the embodiment, the exhaust hole 2 is arranged on the front surface of the housing 1, and specifically, the exhaust hole is a small through hole arranged in a 3 × 3 matrix. When auxiliary switch carries out the switching state, even produce the electric spark between sound contact, 1 inside air of casing carries out timely convection current through exhaust hole 2 and outside air for 1 inside cooling of casing extinguishes the electric spark, thereby avoids its damage to auxiliary switch, has improved stability and security of using.

Example two

As shown in fig. 2, the internal structure of the auxiliary switch used in this embodiment is the same as that of the first embodiment, except that the air outlet holes 2 are distributed on the front surface of the housing 1, the air outlet holes 2 are circular holes, and the air outlet holes 2 are covered with the grid plate 5. The grid plate 5 is connected with the exhaust hole 2 through a buckle structure or a magnetic attraction structure.

EXAMPLE III

As shown in fig. 3 and 4, the auxiliary switch used in this embodiment has an internal structure similar to that of the first embodiment, and is different in that the air discharge holes 2 are distributed on the front surface of the housing 1, and the air discharge holes 2 are in the shape of a plurality of rows of rectangles. The discharge hole 2 includes a first outlet 21 disposed inside the case 1 and a second outlet 22 disposed outside the case 1, the first outlet 21 being larger than the second outlet 22.

Example four

As shown in fig. 5, the present embodiment uses the same overall structure of the auxiliary switch as the first embodiment, and is different in that the housing 1 includes a base 11 and a cover 12, and the base 11 and the cover 12 are connected by riveting. This structure makes casing 1 can the one shot forming installation through the riveting machine, replaces current bolted connection, effectively improves assembly efficiency. Still be equipped with baffle 3 in the casing 1, the vertical one side that is located the sound contact, baffle 3 and casing 1 form isolation chamber 4, are equipped with exhaust duct 31 on baffle 3, and this structure makes the electric spark can pass through exhaust hole and exhaust duct cooling simultaneously, further improves the security.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A shell structure of an auxiliary switch of a circuit breaker is characterized in that exhaust holes (2) are distributed on one side surface of a shell (1), and the positions of the exhaust holes (2) correspond to the contact positions of moving and static contacts in the auxiliary switch; casing (1) in be equipped with baffle (3), vertically be located one side of sound contact, baffle (3) and casing (1) form isolation chamber (4), be equipped with air discharge duct (31) on baffle (3).

2. The casing structure of an auxiliary switch of a circuit breaker as claimed in claim 1, wherein the exhaust holes (2) are through holes arranged in a matrix form.

3. A case structure of an auxiliary switch of a circuit breaker according to claim 1, characterized in that each exhaust hole (2) is covered with a mesh plate (5).

4. A casing structure of an auxiliary switch of a circuit breaker as claimed in claim 3, wherein said grid plate (5) and said exhaust hole (2) are detachably connected.

5. A case structure of an auxiliary switch of a circuit breaker according to claim 1, characterized in that each exhaust hole (2) is rectangular or circular.

6. A case structure of an auxiliary switch of a circuit breaker according to claim 1, wherein the exhaust hole (2) comprises a first outlet (21) disposed inside the case (1) and a second outlet (22) disposed outside the case (1), and the first outlet (21) is larger than the second outlet (22).

7. The casing structure of an auxiliary switch of a circuit breaker according to claim 1, characterized in that the casing (1) comprises a base (11) and a cover plate (12), and the base (11) and the cover plate (12) are connected by riveting.