An explosion-proof method for an electric welding machine

Abstract

The invention relates to an anti-explosion method for an electric welding machine, belongs to the field of electrical explosion prevention and applicable to electric welding on flammable and explosive occasions such as mines and chemical engineering places. According to the anti-explosion method for the electric welding machine, the electric welding machine, a contactor and other protection and control circuits capable of producing electric sparks easily are placed in a flameproof enclosure to form an explosive-proof welding source; in the welding process, electric arcs generated nearby a torch head are cooled by high-pressure nitrogen gas sprayed out of an internal spray nozzle of a welding gun, extremely hot molten iron sprayed nearby a weldment in the welding process is cooled by high-pressure water sprayed out of an external spray nozzle of the welding gun, the gas content nearby the welding gun is detected by a gas sensor, the flow of the high-pressure nitrogen gas and the flow of the high-pressure water are detected by a flow sensor, and a control cable is used for controlling connection and disconnection of a circuit of the explosive-proof welding source.

Description

technical field [0001] The invention relates to an explosion-proof method for an electric welding machine, which is suitable for welding large-scale mechanical equipment on the mining working face of underground coal mines. technical background [0002] At present, if the large-scale mechanical equipment used in the underground mining face of coal mines is damaged, it is difficult to transport it to the ground for maintenance. It will take a long time and man-hours, which will seriously affect production and cause major economic losses. Generally, it is repaired underground, or even welded underground. , Underground open flame electric welding is likely to cause coal dust and gas explosion accidents. Although it is generally approved by the chief engineer of the mine and some management measures are taken, there is no reliable technical guarantee, which will pose a threat to the life safety of miners. Contents of the invention [0003] The purpose of the present invention ...

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Problems solved by technology

[0002] At present, if the large-scale mechanical equipment used in the underground mining face of coal mines is damaged, it is difficult to transport it to the ground for maintenance. It will take a long time and man-hours, which will seriously affect production and cause major economic losses. Generally, it is repaired underground, or even welded underground. , Underground open flame electric welding is likely to cause coal dust and gas explosion accidents. Although it is generally approved by the chief engineer of the mine and some management measures are taken, there is no reliable technical guarantee, which will pose a threat to the life safety of miners.

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