CN206059322U - A kind of heat abstractor of chopper - Google Patents

Abstract

The purpose of this utility model is to provide a heat dissipation device for a circuit breaker, including a circuit breaker, the circuit breaker includes a static contact fixing plate and a moving contact fixing frame, the moving contact fixing frame is provided with a moving contact, and the static contact is fixed There is a static contact corresponding to the moving contact on the plate, a cooling device for cooling the moving contact is provided on the moving contact fixing frame, a cooling device for water cooling is installed on the fixed contact fixing plate, and the moving contact The fixed frame is set as a fixed frame with a U-shaped groove, and the heat dissipation device includes a heat-conducting fin and a cooling fan. Improve the heat dissipation effect of the dynamic and static contacts, prevent the deformation caused by the high temperature of the dynamic and static contacts, improve the contact accuracy of the circuit breaker, improve the stability of the power supply system, reduce the loss of circuit breaker components, and prolong the service life of the circuit breaker.

Description

A cooling device for a circuit breaker

technical field

The utility model relates to the field of circuit breakers, including research, development and improvement of the circuit breaker and the heat dissipation and cooling of the circuit breaker, in particular to a heat dissipation device of the circuit breaker.

Background technique

With the development of my country's economy, mine lighting is particularly important. At present, most of the circuit breakers used in low-voltage feed switches are directly fixed. The input and output of circuit breakers are connected by cables. When the feed switch is opened, The isolation of input and output only relies on vacuum tubes for isolation, and closes and breaks through moving and static contacts. A large amount of heat is generated in the circuit breaker, causing damage to the circuit breaker, causing the contact of the circuit breaker to overheat and deform, resulting in poor contact, affecting the entire power supply system, and at the same time accelerating the loss of circuit breaker components and reducing the service life.

Therefore, a heat dissipation device for a circuit breaker is provided, in order to improve the heat dissipation effect of the dynamic and static contacts by adding a corresponding heat dissipation and cooling device to the dynamic and static contacts of the circuit breaker, prevent the deformation of the dynamic and static contacts due to excessive temperature, and improve The contact accuracy of the circuit breaker, improving the stability of the power supply system, and at the same time, reducing the loss of circuit breaker components and prolonging the service life of the circuit breaker have become problems that need to be solved urgently by those skilled in the art.

Utility model content

The purpose of this utility model is to provide a heat dissipation device of a circuit breaker, in order to improve the heat dissipation effect of the dynamic and static contacts and prevent the temperature of the dynamic and static contacts from being too high Cause deformation, improve the contact accuracy of the circuit breaker, improve the stability of the power supply system, at the same time, reduce the loss of circuit breaker components and prolong the service life of the circuit breaker.

In order to solve the technical problems described in the background technology, the utility model adopts the following technical solutions:

A heat dissipation device for a circuit breaker, including a circuit breaker, the circuit breaker includes a fixed contact plate and a moving contact fixing frame, the moving contact fixing frame is provided with a moving contact, and the static contact The static contact corresponding to the moving contact is provided on the head fixing plate, the moving contact fixing frame is provided with a heat dissipation device for dissipating heat from the moving contact, and the static contact fixing plate is provided with a water cooling device. A cooling device for cooling, the moving contact fixing frame is set as a fixing frame with a U-shaped groove, the heat dissipation device includes a heat conducting fin and a cooling fan, and the side of one end of the heat conducting fin is fixed on the moving contact fixing frame In the U-shaped groove, the other end of the heat conducting sheet is fixed on the cooling fan.

Preferably, the cooling device includes a cold water tank and a cold water pipe, the cold water tank is fixed on the fixed contact plate, the two ends of the cold water pipe are respectively connected to the water inlet and the water outlet of the cold water tank, and The cold water pipe surrounds the edge of the fixed contact plate for a week, and a water pump is provided at the water outlet of the cold water pipe and the cold water tank, and the temperature of the fixed plate of the static contact can be lowered by the cooling device, thereby generating a temperature between the fixed plate and the fixed contact. Poor, conduct heat conversion and reduce the temperature of the static contact.

Preferably, the cold water tank is provided with a water cooler for lowering the water temperature, which can cool down the water in the cold water tank and the cold water pipe, and can improve the cooling effect on the fixed contact plate.

Preferably, uniform and equally spaced heat dissipation holes are provided on the fixed contact plate, which can improve the heat dissipation effect on the fixed plate of the static contact.

Preferably, the heat conduction sheet is set as an L-shaped structure, and the heat conduction sheet, the moving contact fixing frame and the heat dissipation fan are all contacted and connected through the side wall of the heat conduction sheet, which can increase the heat conduction sheet, the moving contact fixing frame and the heat dissipation fan. The contact area between the cooling fans improves the effect of heat conduction and improves the cooling efficiency.

Preferably, heat-conducting silica gel is coated between the heat-conducting sheet, the moving contact fixing frame and the cooling fan, which can reduce the thermal resistance at the connection between the heat-conducting sheet, the moving contact fixing frame and the cooling fan, and improve the heat conduction speed and efficiency , improve the cooling effect.

The beneficial effects of the utility model are:

1) It can improve the heat dissipation effect of the dynamic and static contacts, prevent the deformation of the dynamic and static contacts due to excessive temperature, improve the contact accuracy of the circuit breaker, and improve the stability of the power supply system.

2) Reduce the loss of circuit breaker components and prolong the service life of the circuit breaker.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. For some embodiments described, those skilled in the art can also obtain other drawings according to these drawings.

FIG. 1 is a structural schematic diagram of a specific embodiment of a heat dissipation device for a circuit breaker of the present invention.

detailed description

In order to make those skilled in the art better understand the technical solution of the utility model, the utility model will be further introduced in detail below in conjunction with the accompanying drawings.

Please refer to Fig. 1, a heat dissipation device for a circuit breaker, including a circuit breaker, the circuit breaker includes a static contact fixing plate 1 and a moving contact fixing frame 8, and the moving contact fixing frame 8 is provided with a moving Contact 7, the static contact 2 corresponding to the movable contact 7 is provided on the static contact fixing plate 1, and the heat dissipation device for dissipating heat from the movable contact 7 is provided on the movable contact fixing frame 8. device, the static contact fixed plate 1 is provided with a water-cooled cooling device, the movable contact fixed frame 8 is set as a fixed frame with a U-shaped groove, and the heat dissipation device includes a heat conducting sheet 9 and a heat dissipation For the fan 10 , the side of one end of the heat conduction sheet 9 is fixed in the U-shaped groove of the moving contact fixing frame 8 , and the other end of the heat conduction sheet 9 is fixed on the cooling fan 10 .

In the present embodiment, the cooling device includes a cold water tank 5 and a cold water pipe 6, the cold water tank 5 is fixed on the static contact fixing plate 1, and the two ends of the cold water pipe 6 are connected to the cold water tank 5 respectively. The water inlet and the water outlet are connected, and the cold water pipe 6 surrounds the edge of the fixed contact plate 1 for a week. The cold water pipe 6 and the water outlet of the cold water tank 5 are provided with a water pump 4, and the cooling device can reduce the static contact. The temperature of the plate 1, and then there is a temperature difference with the static contact 2, and the heat is converted to reduce the temperature of the static contact 2.

In this embodiment, the cold water tank 5 is provided with a water cooler for lowering the water temperature, which can cool down the water in the cold water tank 5 and the cold water pipe 6 , and can improve the cooling effect on the fixed contact plate 1 .

In this embodiment, the static contact fixing plate 1 is provided with cooling holes 11 evenly and at the same interval, which can improve the cooling effect on the static contact fixing plate 1 .

In this embodiment, the heat conduction sheet 9 is set as an L-shaped structure, and the heat conduction sheet 9 is connected to the movable contact fixing frame 8 and the cooling fan 10 through the side wall of the heat conduction sheet 9, which can increase the heat conduction sheet 9, the contact area between the moving contact fixing frame 8 and the cooling fan 10 improves the effect of heat conduction and improves the cooling efficiency.

In the present embodiment, heat-conducting silica gel is coated between the heat conducting sheet 9, the moving contact fixing frame 8 and the heat dissipation fan 10, which can reduce the heat at the joint between the heat conducting sheet 9, the moving contact fixing frame 8 and the heat dissipation fan 10. Resistance value, improve heat conduction speed and efficiency, and improve heat dissipation effect.

In specific implementation, when the circuit breaker is in use, the circuit breaker will increase the heat production of the circuit breaker moving contact 7 and the static contact 2 due to the high resistance of the current at the connection point. In this design, by fixing the moving contact The inner side of the U-shaped fixed frame of the frame 8 is provided with a heat conducting sheet 9, and the heat on the moving contact fixing frame 7 is transferred to the cooling fan 10 through the heat conducting sheet 9 to cool down and dissipate heat. 1. Water cooling and heat dissipation, cooling and heat dissipation of the static contacts 2 through heat transfer, improving the prevention of deformation caused by excessive temperature of the moving and static contacts, improving the contact accuracy of the circuit breaker, improving the stability of the power supply system, and reducing circuit breaker components The loss and prolong the service life of the circuit breaker.

Some exemplary embodiments of the present utility model have been described above only by way of illustration. Undoubtedly, for those skilled in the art, without departing from the spirit and scope of the present utility model, various Modifications are made to the described embodiments. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims (6)

1. a kind of heat abstractor of chopper, including chopper, it is characterised in that：Described chopper includes static contact fixed plate With moving contact fixed mount, described moving contact fixed mount is provided with moving contact, and described static contact fixed plate is provided with and dynamic touches Corresponding static contact, described moving contact fixed mount are provided with the heat abstractor for radiating to moving contact, and described is quiet Contact fixed plate is provided with the heat sink of water-cooled cooling, and described moving contact fixed mount is set to the fixed mount with U-type groove, institute The heat abstractor stated includes conducting strip and radiator fan, and the side of one end of described conducting strip is fixed on moving contact fixed mount In U-type groove, the other end of described conducting strip is fixed on radiator fan.

2. the heat abstractor of a kind of chopper according to claim 1, it is characterised in that described heat sink includes cold Water tank and cold water pipe, described cold water storage cistern are fixed in static contact fixed plate, the two ends of described cold water pipe respectively with cold water storage cistern Water inlet and outlet connection, and cold water pipe is around the edge of static contact fixed plate one week, described cold water pipe and cold water storage cistern Water outlet be provided with water pump.

3. the heat abstractor of a kind of chopper according to claim 2, it is characterised in that be provided with use in described cold water storage cistern In the water chiller for reducing water temperature.

4. the heat abstractor of a kind of chopper according to claim 1, it is characterised in that in described static contact fixed plate It is provided with the uniform louvre with interval.

5. the heat abstractor of a kind of chopper according to claim 1, it is characterised in that described conducting strip is set to L-shaped Structure, described conducting strip is to be connected by the sidewall contact of conducting strip with moving contact fixed mount and radiator fan.

6. the heat abstractor of a kind of chopper according to claim 1, it is characterised in that described conducting strip and moving contact Heat conductive silica gel is scribbled between fixed mount and radiator fan.