Underwater dry arc welding welding device with nozzle and welding method

Abstract

The invention discloses an underwater dry electric arc welding device with a nozzle and a welding method. The welding device comprises a welding gun, a gas supply device and a control unit. The welding gun comprises a gun barrel and a welding handle. A gas inlet is formed in the gun barrel. An automatic clamping mechanism assembling a welding rod is arranged in the gun barrel. In the axial direction, a barrel cavity in one side of the gun barrel is connected with the gas outlet end of the gas supply device through the gas inlet, wherein an end opening of the barrel cavity of the side is provided with a gas nozzle and an end cover which is capable of being opened outwards and overturned, and the end cover is automatically controlled to be closed through an elastic mechanism. A pushing mechanism is arranged in a barrel cavity in the other side; and the automatic clamping mechanism is installed on the pushing mechanism and is driven by the pushing mechanism to move in the axial direction of the gun barrel. The underwater dry electric arc welding device is novel in design, convenient to operate and easy to achieve, the manner that shield gas is sprayed from the interior of the nozzle of the welding gun is adopted, a local space dry environment is formed rapidly, and dryness of the welding rod under underwater welding can be ensured.

Description

technical field [0001] The invention belongs to the field of mechanical processing and relates to underwater welding technology, in particular to an underwater dry arc welding welding device with a nozzle and a welding method. Background technique [0002] At present, underwater welding is becoming an increasingly popular and practical welding technology, especially suitable for many occasions where underwater parts need to be repaired in ships and marine engineering. However, due to the influence of the working environment, there are still many implementations of underwater welding. The technical difficulties include that the weld seam and welding materials are easy to enter water, which leads to an increase in the hydrogen content of the weld seam, the safety hazard caused by the conductivity of water, and the fact that workers cannot see the position of the arc and weld seam clearly when welding in water. Skill requirements are relatively high, among which, the waterproof...

AI Technical Summary

Problems solved by technology

For example, some predecessors added a welding cover to the helmet, and used air drainage in the welding cover to form a dry space. Although this method can maximize the same effect as welding in water and welding on shore, the cost is huge and the device is complicated. , and time-consuming and labor-intensive, it is often not suitable for repairing welded structures in water, especially emergency repairs

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