Device and method for exhausting smoke following arc welding

Abstract

The invention relates to a welding fume extractor along with electric arcs, and belongs to the technical fields of welding environment protection, welder personal safety and labor protection. The welding fume extractor is composed of electric welding pliers, a fume collecting hood, a welding cable, a fume exhausting pipe, an electric welding machine, a suction ventilator, a vacuumizing machine, a power source switch, a speed-control switch and a protective hood, wherein the electric welding pliers are divided into a pliers mouth and a hand shank, and the pliers mouth is made of copper alloy and used for connecting cables, clamping a welding rod, fixing the hand shank and conducting a current; the hand shank is made of hollow bakelite and used for operating the electric welding pliers and fixing the fume collecting hood and the protective hood; the fume collecting hood and the protective hood are mutually connected and then fixed to the hand shank of the electric welding pliers; under the action of the suction ventilator and the vacuumizing machine, welding fume is firstly collected through the fume collecting hood, enters the suction ventilator and the vacuumizing machine in the electric welding machine through the hand shank and the fume exhausting pipe of the electric welding pliers and then is exhausted; one end of the welding cable penetrates into the hand shank to be connected with the pliers mouth of the electric welding pliers, while the other end of the welding cable penetrates into the fume exhausting pipe to be connected with the electric welding machine. The welding fume extractor is small in size and light in weight, and a power source is connected with the electric welding machine, so that people do not need to provide the power source separately.

Description

technical field [0001] The invention relates to a device and method for arc-following welding smoke exhaust, and belongs to the technical fields of welding environment protection, welder's personal safety and labor protection. Background technique [0002] Welding is a toxic and harmful technical profession, and the harmful elements mainly come from welding fumes. Especially when operating in limited spaces such as containers, underground wells, workshops, etc., as long as the arc is ignited, a large amount of smoke will accumulate inside. Although axial flow fans are sometimes installed for smoke exhaust, the effect is not very good. Still in a smoky environment. Moreover, there is only one safe passage in many limited spaces. If a fan is installed to exhaust smoke, workers will have no escape route. Especially after long-term use of containers and pipelines, a large amount of harmful impurities such as H, C, P, S, etc. have infiltrated. During inspection and maintenance,...

AI Technical Summary

Problems solved by technology

Especially when operating in limited spaces such as containers, underground wells, workshops, etc., as long as the arc is ignited, a large amount of smoke will accumulate inside. Although axial flow fans are sometimes installed for smoke exhaust, the effect is not very good. Still in a smoky environment

Moreover, there is only one safe passage in many limited spaces. If a fan is installed to exhaust smoke, the workers will have no escape route.

Especially after long-term use of containers and pipelines, a large amount of harmful impurities such as H, C, P, S, etc. have infiltrated. During inspection and maintenance, not only welding fume will be generated, but also a large amount of H2S, CO, CO will be generated under the action of high temperature. 2 It will cause great harm to the workers, and even lead to suffocation in severe cases.

[0003] Disadvantages of natural ventilation and smoke exhaust: natural ventilation must have good channels, but often there is only one manhole in some limited spaces, especially in wells, underground storage tanks, etc. Even the medium inlet and outlet are on the same plane as the manhole. The gas is not easy to circulate, especially the welding fume and hot gas are all left in the working space, and the internal work will cause harm to the human body

[0004] Disadvantages of axial flow fan for smoke exhaust: axial flow fan has high power and large volume, not only consumes a lot of electric energy, but also requires a certain amount of manpower during installation

In order to exhaust smoke effectively and facilitate installation, manholes are generally chosen as the installation site to block the safe passage. If there is an emergency, it is difficult for personnel to evacuate, which brings great danger.

Moreover, the axial flow fan exhausts the smoke for the entire working space, and there is a lot of smoke left in the large area, and the workers are still shrouded in the smoke, especially the welders are always inseparable from the damage of the smoke.

And the cost is high. At least 3 electricians are required to install one axial flow fan, and the cable is 30-50 meters. The total cost is about 2,500 yuan.

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