Electric shock prevention device for electric welding machine

Abstract

An electric shock prevention device for an electric welding machine is provided with a finger ring line, an electric shock prevention circuit, a finger ring line detecting circuit and a transmission switching signal circuit, wherein output of the electric shock prevention circuit and output of the finger ring line detecting circuit are respectively connected with an electric leakage protection unit, the transmission switching signal circuit is connected with the electric leakage protection unit through a required switching circuit, and the finger ring line comprises a core wire, an insulating layer, a shielding layer and an outer insulating layer in a wrapping manner from inside to outside. The electric shock prevention device is rapid and reliable in tripping and excellent in electric shock prevention effect. The simple finger ring signal line (the signal line is sleeved on a finger or held in a hand, or the signal line is connected with a conductor, and then the conductor contacts with the hand or a wrist, an ankle and the like) synchronously and accurately extracts weak electric induction signals when an optional portion of the body of an electric welder is in electric shock, and rapidly drives an electric leakage protector, a specially customized high-power relay or a specially customized contactor to cut off power (a person in electric shock can be protected by driving the high-power relay or the contactor to cut off the power).

Description

technical field [0001] The invention relates to an electric shock prevention device. In particular, it relates to an anti-shock device for electric welding machines that can synchronously and accurately extract the weak electric induction signals when any part of the welder's body gets an electric shock through a ring signal line, and quickly drive a high-power relay or contactor to cut off the power. . Background technique [0002] The shipbuilding industry has a large amount of welding work and a complex working environment. However, due to the lack of effective anti-shock technology to protect welders, there have been many incidents of welding machine deaths over the years, which have not been effectively resolved. [0003] At present, the welding machine energy saver used in various industries also has an auxiliary anti-shock function at no-load, which is realized by switching between low and high voltages during no-load and welding. When the voltage is low at no-load (...

AI Technical Summary

Problems solved by technology

However, in dangerous occasions such as ballast tank welding operations, the no-load voltage above 6V may still cause death by electric shock

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