CN218957649U

CN218957649U - Circuit breaker for low-temperature-rise low-voltage power line

Info

Publication number: CN218957649U
Application number: CN202320190735.XU
Authority: CN
Inventors: 吴佳琪; 吴建国; 何海; 高宏兵; 邵敏杰; 卢相安; 夏良杰; 陈松行; 虞佳浩
Original assignee: Zhoushan Shengsihai Guangming Electric Appliance Co ltd
Current assignee: Zhoushan Shengsihai Guangming Electric Appliance Co ltd
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-05-02
Anticipated expiration: 2033-02-13

Abstract

A circuit breaker for low temperature rise low voltage electrical lines. Mainly solves the problem that the temperature rise is higher because part of high-temperature gas residues still exist at the position of the current static contact. The method is characterized in that: the contact mechanism comprises a moving contact (31) and a fixed contact (32) which are oppositely arranged, a first wall (11) and a second wall (12) are arranged in the shell, a first channel (13) is formed between the first wall and the second wall, a wire frame (5) is arranged on the shell, a second channel (51) is arranged between the wire frame and the inner wall of the shell, one end of the first channel is communicated with the second channel, and the other end of the first channel is oppositely arranged with the back of the fixed contact. The utility model provides a circuit breaker for a low-temperature-rise low-voltage circuit, which can discharge residual gas at a static contact along a first channel and a second channel, increases a cooling channel and has lower overall temperature rise.

Description

Circuit breaker for low-temperature-rise low-voltage power line

Technical Field

The utility model relates to the field of cold rolling mills, in particular to a circuit breaker for a low-temperature-rise low-voltage power line.

Background

The circuit breaker for low-voltage electric line is a miniature circuit breaker, which is suitable for overload and short-circuit protection of AC 50/60Hz rated voltage 230/400V and rated current to 63A line, and can be used as the infrequent operation conversion of line under normal condition.

The temperature in the circuit breaker is mainly caused by high-temperature and high-pressure gas generated when the fixed contact and the moving contact are separated, and in order to reduce the temperature in the circuit breaker shell, a plurality of circuit breakers are provided with gas outlet holes opposite to the arc extinguishing chamber at the side wall and the bottom of the shell, however, part of high-temperature gas remains at the fixed contact.

Disclosure of Invention

In order to overcome the defects of the background technology, the utility model provides a circuit breaker for a low-temperature-rise low-voltage power line, which mainly solves the problem that the temperature rise is higher due to the fact that part of high-temperature gas residues still exist at the existing static contact.

The technical scheme adopted by the utility model is as follows:

the utility model provides a circuit breaker that low temperature rise's low voltage circuit was used, includes the casing, be equipped with operating device, contact mechanism and arc extinguishing mechanism in the casing, contact mechanism is including moving contact and the static contact of relative setting, be equipped with first wall and second wall in the casing, first wall with form first passageway between the second wall, install the wire frame on the casing, there is the second passageway between wire frame and the shells inner wall, first passageway one end with second passageway intercommunication, the other end with the back of static contact sets up relatively.

At least one first blocking wall is arranged on the first wall, and the first blocking wall shields the air passage of the part.

The second wall is provided with a second baffle wall, the second baffle wall is arranged in the gas passing channel, and the first baffle wall and the second baffle wall are arranged in a vertically staggered mode.

The arc extinguishing mechanism comprises an arc extinguishing chamber, a third wall connected with the first wall is arranged on the first wall, the third wall is arranged on one side of the arc extinguishing chamber where the air outlet end is located, and a notch groove communicated with the second channel is formed in the third wall.

The first wall is provided with a supporting wall, and the contact part of the static contact part and the supporting wall is arranged in the first channel.

The side wall of the shell is provided with a second through hole.

The beneficial effects of the utility model are as follows: the utility model provides a circuit breaker for a low-temperature-rise low-voltage circuit, which can discharge residual gas at a static contact along a first channel and a second channel, increases a cooling channel and has lower overall temperature rise.

Drawings

Fig. 1 is a schematic diagram of an internal structure of an embodiment of the present utility model.

Fig. 2 is an enlarged schematic view at a in fig. 1.

Detailed Description

The utility model is further described below with reference to the accompanying drawings: as shown in the figure, a circuit breaker for low-voltage electric circuit of low temperature rise, including casing 1, be equipped with operating device 2, contact mechanism 3 and arc extinguishing mechanism 4 in the casing, its characterized in that: the contact mechanism comprises a moving contact 31 and a fixed contact 32 which are oppositely arranged, a first wall 11 and a second wall 12 are arranged in the shell, a first channel 13 is formed between the first wall and the second wall, a wire frame 5 is arranged on the shell, a second channel 51 is arranged between the wire frame and the inner wall of the shell, one end of the first channel is communicated with the second channel, and the other end of the first channel is oppositely arranged with the back of the fixed contact. Most gas reaches explosion chamber department through arc striking mechanism (including prior art such as magnetic blow or air blow) of explosion chamber front end during the use, but it is believed that some remnants can be discharged along first passageway and second passageway, have increased the passageway of cooling, and whole temperature rise is lower, and operating device 2, contact mechanism 3 and explosion mechanism 4 are prior art in addition, and the description is not repeated. The dashed arrows in fig. 1 are the direction of the air flow.

In this embodiment, as shown in the drawing, at least one first blocking wall 111 is disposed on the first wall, and the first blocking wall blocks a part of the gas passing channel. Preventing the electric spark from flying out.

In this embodiment, as shown in the drawing, the second wall is provided with a second blocking wall 121, the second blocking wall is disposed in the gas passing channel, and the first blocking wall and the second blocking wall are disposed in a vertically staggered manner.

In this embodiment, as shown in the drawing, the arc extinguishing mechanism includes an arc extinguishing chamber 41, a third wall 14 connected to the first wall is provided on the first wall, the third wall is provided on a side of the arc extinguishing chamber where the air outlet end is located, and a notch groove 141 communicating with the second channel is provided on the third wall. The gas of explosion chamber also can follow the second passageway and discharge, has increased multichannel exhaust possibility, does benefit to the cooling more.

In this embodiment, as shown in the drawing, the first wall is provided with a supporting wall 112, and the contact portion of the stationary contact portion and the supporting wall is disposed in the first channel.

In this embodiment, as shown in the figure, the side wall of the housing is provided with a second through hole 15. The second through hole is opposite to the arc extinguishing chamber and is a conventional air outlet channel.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The embodiments described with reference to the drawings are exemplary and intended to be illustrative of the utility model and should not be construed as limiting the utility model. The examples should not be construed as limiting the utility model, but any modifications based on the spirit of the utility model should be within the scope of the utility model.

Claims

1. The utility model provides a circuit breaker that low temperature rise was used for low voltage circuit, includes casing (1), be equipped with operating device (2), contact mechanism (3) and arc extinguishing mechanism (4) in the casing, its characterized in that: the contact mechanism comprises a moving contact (31) and a fixed contact (32) which are oppositely arranged, a first wall (11) and a second wall (12) are arranged in the shell, a first channel (13) is formed between the first wall and the second wall, a wire frame (5) is arranged on the shell, a second channel (51) is arranged between the wire frame and the inner wall of the shell, one end of the first channel is communicated with the second channel, and the other end of the first channel is oppositely arranged with the back of the fixed contact.

2. A low temperature rise circuit breaker for low voltage electrical wiring as in claim 1 wherein: at least one first blocking wall (111) is arranged on the first wall, and the first blocking wall shields the gas passing channel of the part.

3. A low temperature rise circuit breaker for low voltage electrical wiring as in claim 2 wherein: the second wall is provided with a second baffle wall (121), the second baffle wall is arranged in the gas passing channel, and the first baffle wall and the second baffle wall are arranged in a vertically staggered mode.

4. A low temperature rise circuit breaker for low voltage electrical wiring as claimed in claim 3, wherein: the arc extinguishing mechanism comprises an arc extinguishing chamber (41), a third wall (14) connected with the first wall is arranged on the first wall, the third wall is arranged on one side of the arc extinguishing chamber where the air outlet end is located, and a notch groove (141) communicated with the second channel is formed in the third wall.

5. The low temperature rise circuit breaker for low voltage electrical wiring as claimed in claim 4, wherein: and a supporting wall (112) is arranged on the first wall, and the contact part of the static contact part and the supporting wall is arranged in the first channel.

6. A low temperature rise circuit breaker for use in a low voltage electrical circuit according to claim 5, wherein: the side wall of the shell is provided with a second through hole (15).