Safety facts you need to know when using a welding machine

      Many new welders or electricians did not receive systematic training before engaging in welding work, and their safety awareness was not strong, which led to serious consequences. One of my classmates and the husband of a former colleague were electrocuted, and their families fell apart. There are more safety displays below for everyone. Everyone should take warning. Of course, the company is purchasingwelding machineYou should also choose a safe and reliable welding machine.

Accident case 1

Alcohol barrel explodes after welding repair leaks

The main process of the accident——

A pharmaceutical factory workshop sent a leaking alcohol barrel to the machine repair team for welding repair. Shortly after the welder was welding, the alcohol barrel exploded. The flying barrel lid directly cracked the welder's head, causing death on the spot.

The main cause of the accident——

alcohol barrelWithout any cleaning before welding, there is still residue in the barrel, and alcohol is highly volatile and forms an explosive mixed gas with air in a closed container, which will ignite and explode during gas welding.

Main preventive measures -

(1) Containers containing alcohol must be cleaned with clean water before welding, and the lid must be opened for welding.

(2) Before welding, the welder must find out what kind of flammable and explosive items have been contained in the container and complete the cleaning. Blind welding repairs with fire are strictly prohibited.

Accident case 2

The main story of the accident——

A welder in a factory was performing welding operations at an outdoor temporary construction site. During the operation, he found that there was no power gate box when wiring the welding machine, so he de-energized the rubber on the head of each conductor on the cable and connected them to the open-air power grid. However, because he mistakenly connected the neutral wire to the live wire, he suffered an electric shock when he adjusted the welding current and touched the shell with his hand, resulting in death.

The main reason leading to the accident——

The welder was not familiar with the relevant electrical safety knowledge and mistakenly connected the neutral wire to the live wire, causing the shell of the welding machine to become electrified, resulting in electrocution.

How to prevent accidents?

Wiring work must be done by an electrician and welders are not allowed to do it without authorization.

Accident case 3

The wiring board was burned and the welding machine shell was charged, causing an electric shock accident.

The main process of the accident——

Welders A and B in a factory were performing spot welding operations on iron shells. They found that a section of the lead coil of the welding machine had been broken, so electrician A found a section of soft wire and asked electrician B to replace it. When B was replacing the wires, he found that the bolts of the wiring board were loose, so he tightened them with a wrench. A was not present at this time. Then B left the job site after a few trial welds. After A returned, he started spot welding without understanding the situation. After only welding for a while, he screamed and fell to the ground. Worker C immediately shut off the power supply, but eventually died due to lack of timely rescue efforts.

The main reason for the accident——

(1) Due to the burnt wiring board, the coil and the welding machine casing are trying to collide, causing a short circuit.

(2) The welding machine shell is not grounded

How to prevent accidents?

(1) Equipment maintenance should be carried out by electricians

(2) Welding equipment should be protected and grounded

Accident case 4

When a welder works in a container, he uses oxygen to replace it and causes a fire.

The main story of the accident——

A mechanical welder at a pesticide factory was welding baffles in a breeding pot with a diameter of one meter and a height of two meters. There was no smoke exhaust equipment inside the equipment, so the welder used oxygen to blow away the smoke in the pot. However, when the welder entered the pot again for welding work, he only heard a "boom" and a fire broke out. The welder was burned more than 80% of the area, and third-degree burns accounted for 60%. He died 7 days after rescue.

The main reason for the accident——

(1) It is a serious violation to use oxygen as a ventilation source

(2) There is no ventilation device when entering the container for welding.

How to prevent accidents?

(1) Ventilation devices should be provided when entering the container for welding operations

(2) The ventilation air source should be compressed air

Accident case 5

The desorption tank was used as the grounding electrode of the welding machine, causing an accident.

The incident——

A welder in a factory chose a newly installed desorption tank as a grounding electrode (there were more than two tons of activated carbon in the tank). During the welding, due to local heating at the wire connection, the activated carbon in the tank was ignited. As a result, more than two tons of activated carbon were burned out.

The main reason for the accident——

Fire occurs due to the local heating of activated carbon caused by the resistance heat generated by the welding current and the spark generated during arc ignition.

How to prevent it correctly?

It is strictly prohibited to use metal objects to overlap as conductors in the welding circuit.

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