Arc extinguishing device

Abstract

The invention relates to an arc extinguishing device, which comprises an insulating sleeve and a pull rod arranged in the insulating sleeve, wherein one side of the insulating sleeve is provided witha transmission mechanism and a flow guiding rod, and the other side of the insulating sleeve is provided with an arc extinguishing mechanism; the transmission mechanism comprises a fixed sleeve made of an insulating material and a transmission assembly arranged in the fixed sleeve, the flow guiding rod is connected with the pull rod in the insulating sleeve through the transmission assembly, the arc extinguishing mechanism comprises an insulating shell, a binding post arranged outside the insulating shell and an arc extinguishing chamber arranged inside the insulating shell, the arc extinguishing chamber is internally provided with a static contact and a moving contact, one end of the moving contact is connected with the pull rod in the insulating sleeve, and a gas spraying hole port at one side of the arc extinguishing chamber is connected with an arc extinguishing spraying pipe. According to the invention, the arc extinguishing spraying pipe is additionally arranged at the port of the arc extinguishing chamber, the arc extinguishing spraying pipe is internally provided with three cavities which are used for quickly extinguishing the arc and reducing the impact force of an air flow at the same time, and the installation is convenient. Meanwhile, the arc extinguishing effect is improved, and the equipment safety is high.

Description

technical field [0001] The invention relates to an arc extinguishing device in a high-voltage line, in particular to an arc extinguishing device. Background technique [0002] As we all know, due to the large current in the high-voltage circuit, a high-energy arc will be generated while breaking, which will have a great impact on electrical equipment. The conventional method is to install an arc extinguishing device on the isolating switch device or circuit breaker. The arc extinguishing device is set up to prevent unnecessary losses caused by the arc sparks generated when the contacts are disconnected, because the arc sparks will be generated when the contacts or switches are turned on and off, which may cause the following hazards: 1. Burning contacts First-class, as time goes by, the circuit will be poorly connected, causing damage to the circuit. 2. It may cause arc burns to human eyes and skin, and cause unpredictable harm to the human body. 3. In places sensitive to ...

AI Technical Summary

Problems solved by technology

[0002] As we all know, due to the large current in the high-voltage circuit, a high-energy arc will be generated while breaking, which will have a great impact on electrical equipment. The conventional method is to install an arc extinguishing device on the isolating switch device or circuit breaker. The arc extinguishing device is set up to prevent unnecessary losses caused by the arc sparks generated when the contacts are disconnected, because the arc sparks will be generated when the contacts or switches are turned on and off, which may cause the following hazards: 1. Burning contacts First-class, as time goes by, the circuit will be poorly contacted, causing damage to the circuit

2. It may cause arc burns to human eyes, skin, etc., and cause unpredictable harm to the human body

3. In some places sensitive to arc sparks, such as gas plants or places filled with flammable gases, even a little arc spark may cause an explosion, etc.

4. Arc sparks may cause breakdown damage to some electronic products (such as integrated circuits) along with the circuit.

[0003] At present, the most commonly used arc extinguishing device is a gas-generating arc-extinguishing device. The gas-generating arc-extinguishing device includes an arc-extinguishing chamber and a driving mechanism. At this time, the current forms a loop through the drainage rod, the transmission mechanism, the moving and static contacts of the arc extinguishing chamber, and the high-voltage terminal on the side of the knife seat, so as to avoid the high-energy arc from the knife of the high-voltage switch. During the driving process, the extinguishing The dynamic and static contacts in the arc chamber are separated to form an arc, and the arc burns the gas-producing plastic in the arc extinguishing chamber to form a high-pressure airflow to blow off the arc to achieve the purpose of arc extinguishing. Due to the current jet port of the arc extinguishing chamber and the supporting safety device, The high-energy arc is pulled up by the gas nozzle for a long distance, and the arc extinguishing effect is poor, and because there are many supporting facilities around it, it is more harmful. Secondly, after the arc is extinguished, the high-energy arc burns the gas-producing plastic, forming When the high-pressure air is ejected through the nozzle, the impact force is stronger, and the risk factor caused by it is greater

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