How to prevent electric shock in welding? Selection of welding rod is the key

What is the most important thing in fatigue welding of brass wire welded joints? Technology? No, any work safety issue is the first consideration. Welding is a technical work, many years of experience and experienced welding master is rare, because the teacher not only works well, but also efficient and safe. The greatest danger of welding is electric shock. How to prevent electric shock is the key to choose good brass welding wire.

The no-load voltage of domestic welding machine is generally about 50-90V, the voltage of plasma cutting power supply is 300-450V, the voltage of hydrogen atom welding is 300 V, the voltage of electron beam welding machine is as high as 80-150 kV, and the input voltage of domestic motor is 220-380v. Frequency of 50 Hz AC power frequency, which greatly exceeds the safety voltage. HS221 tin brass wire

There are two kinds of electric shock accidents during welding: one is direct electric shock, that is, contact with electrified body in normal operation of welding equipment or near high-voltage power grid and electrical equipment; the other is indirect electric shock, that is, contact with accidental electrified body. Accidentally charged body refers to the conductor that is normally not charged and charged due to insulation damage or electrical equipment failure.

Anti-electric shock measures for welding

(1) Do a good job in the training of welding and cutting workers, so as to get on the job with a certificate, and stop the work of welding and cutting without a witness.

(2) Welders should not wear nailed shoes or cloth shoes in operation. Insulating gloves shall not be less than 300 mm and shall be made of soft leather or canvas. Electrode arc welding work clothes are canvas work clothes and argon arc welding work clothes are wool or leather work clothes.

(3) Welding and cutting equipment should have good isolation and protection devices. The wiring ends extending out of the box shall be covered with protective shield, and the conductors of the pin holes shall be concealed in the plane of the insulating plate for the equipment with pin hole joints.

(4) When replacing welding rods or wires, welders must use welder gloves, which are required to be dry and reliable in insulation. For welding operations with high no-load voltage and welding voltage and in wet environment, welders should use insulating rubber pads to ensure the insulation between welders and weldments. Especially in hot summer weather, clothes are damp after sweating, so they can't lean on welding parts and workbenches.

(5) The protective grounding or zero connection devices shall be installed in the shell of welding and cutting equipment and the shell of electrical control box.

(6) When welding metal structures in metal containers or in narrow workplaces, special protections should be adopted, such as insulating rubber pads, insulating shoes and insulating gloves, to ensure the insulation between welders'bodies and live bodies.

(7) When changing the joints of welding and cutting equipment, replacing the welding parts, changing the secondary circuit, transferring the work place, replacing the fuse and the failure of welding and cutting equipment need to be repaired, the power supply must be cut off before it can be carried out. When pushing and pulling the switch of the brake knife, insulating gloves should be worn, and the head should be deflected.

(8) When working in a dark environment with insufficient light, it is necessary to use a portable working street lamp. In general, the voltage of the lighting lamp used should not exceed 36V. In damp, metal containers and other dangerous environments, the voltage of the lighting lamp shall not exceed 12V.

(9) Welding and cutting equipment shall be equipped with an independent electrical control box, which shall be equipped with fuses, overload protection switches, leakage protection devices and no-load automatic power-off devices. Copper Welding Powder Manufacturer

(10) Installation, inspection and repair of welding and cutting equipment shall be completed by licensed electricians. Welders shall not inspect and repair welding and cutting equipment by themselves.