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Safety nozzle structure for arc extinguishing device

An arc extinguishing device and safety technology, which is applied in the direction of high-voltage air circuit breakers, electrical components, electric switches, etc., can solve problems such as poor circuit contact, high risk factor, and burnt contacts, so as to improve equipment safety and improve Arc extinguishing effect, effect of improving heat insulation performance

Inactive Publication Date: 2018-05-04
毛根善
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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, As a result, the high-energy arc has a longer distance to be pulled up through the gas nozzle, and the arc extinguishing effect is poor, and because there are many supporting facilities around it, it is more harmful. The impact force is stronger when the nozzle is ejected, and the risk factor is greater

Method used

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  • Safety nozzle structure for arc extinguishing device
  • Safety nozzle structure for arc extinguishing device
  • Safety nozzle structure for arc extinguishing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1. A safety nozzle structure for an arc extinguishing device. The safety nozzle structure is arranged at the port of the gas injection hole 41 of the arc extinguishing chamber 4 in the arc extinguishing device. The safety nozzle structure includes an insulating outer tube 1, and the insulating outer tube 1 The inner cavity of the pipe 1 is provided with a heat-insulating inner pipe 2, and a gas-producing plastic layer 3 is arranged on the inner wall of the heat-insulating inner pipe 2. The heat-insulating inner pipe 2 is composed of a two-layer structure, including an outer layer of insulation Cover 21 and the inner tapered tube 22 of the inner layer, the spacer 21 is made of the following components by weight fraction: 45 parts of quartz sand, 10 parts of kaolin, 10 parts of magnesite, 13 parts of dolomite, the inner Conical tube 22 is made of nickel-based superalloy.

[0028] In this scheme, the preparation method of the spacer 21 is as follows: Weigh the a...

Embodiment 2

[0029] Embodiment 2. This embodiment mainly changes the formula of the spacer and the specific parameters of the process. The specific description is as follows: the spacer 21 is made of the following components by weight fraction: 45 parts of quartz sand, 10 parts of kaolin, diamond 10 parts of magnesium ore, 13 parts of dolomite, the inner conical tube 22 is made of cobalt-based superalloy; the preparation method is as follows: weigh the raw materials of the above weight fractions, preliminarily crush the raw materials and put them into a vacuum arc high temperature melting mold In the process, the melting temperature is controlled at 2200°C, and the arc starting voltage is 130VV. After melting, the ring-shaped sleeve is made into a mold through a mold, and the outer diameter of the ring-shaped sleeve is the same as the inner diameter of the insulating outer tube to realize the spacer. It can be assembled into the insulating outer tube, and the spacer is completed.

Embodiment 3

[0030] Embodiment three, this embodiment mainly changes the formula of spacer and the concrete parameter of process, and concrete description is as follows: described spacer 21 is made of the following components by weight fraction: 55 parts of quartz sand, 20 parts of kaolin, rhomboid 25 parts of magnesium ore and 18 parts of dolomite. The preparation method is as follows: weigh the raw materials of the above weight fractions, preliminarily crush the raw materials and put them into a vacuum arc high-temperature melting mold, control the melting temperature to 2500 ° C, and the arc starting voltage to be 150V, after melting, make a ring-shaped sleeve through a mold, and ensure that the outer diameter of the ring-shaped sleeve is the same as the inner diameter of the insulating outer tube, so that the spacer can be assembled into the insulating outer tube, and the spacer is completed.

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Abstract

A safety nozzle structure for an arc extinguishing device is arranged at a gas orifice port of an arc extinguishing chamber in the arc extinguishing device and comprises an insulating outer pipe. A heat insulation inner pipe is arranged in an inner cavity of the insulating outer pipe, the inner wall of the heat insulation inner pipe is provided with a gas generating plastic layer, and the heat insulation inner pipe is in a two-layer structure and comprises an outer isolation sleeve and an inner taper pipe. The isolation sleeve is prepared from, by weight, 45-55 parts of quartz sand, 10-20 parts of kaolin, 10-25 parts of magnesite and 13-18 parts of dolomite. The inner taper pipe is made of an alloy material. The safety nozzle structure can be fittingly arranged at the gas orifice port of the arc extinguishing chamber, and convenience in mounting, arc extinguishing effect improvement and high safety are realized.

Description

technical field [0001] The invention relates to an arc extinguishing device used on a high-voltage line, in particular to a safety nozzle structure for the 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 hum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/70
CPCH01H33/7023H01H33/7076
Inventor 毛根善
Owner 毛根善