Gas shielding device for large-diameter elbow pipe continuous welding

Abstract

The invention discloses a gas shielding device for large-diameter elbow pipe continuous welding, and relates to the technical field of elbow pipe production. The gas shielding device for large-diameter elbow pipe continuous welding comprises a mounting backboard, an arc-shaped rail, a sliding trolley and a gas shielding box, an elbow pipe main body is fixed at a front side face of the mounting backboard through a set of clamps, a lower part of the mounting backboard is provided with a set of arc-shaped mounting groove, and the arc-shaped rail comprises a set of arc-shaped rods. The gas shielding device for large-diameter elbow pipe continuous welding, with the sliding trolley, can guarantee that the gas shielding box can always jack up an inner wall of the elbow pipe main body, meanwhile,the arc-shaped rail is arranged in the elbow pipe main body, and by cooperation of a motor, a first chain wheel, a second chain wheel and a chain, sliding movement of the gas shielding box in the elbow pipe main body can be realized, simultaneously, shielding gas is introduced into the gas shielding box, a movable inert gas shielding chamber can be formed at the inner wall of the elbow pipe main body and can move synchronously with an external plasma welding gun head, and thus, a problem of insufficient inert gas shielding range of continuous welding for a large-diameter elbow pipe is solved.

Description

technical field [0001] The invention belongs to the technical field of bend pipe production, in particular to a gas protection device for continuous welding of large-diameter bend pipes. Background technique [0002] For the production of bent pipes, two semi-circular arc-shaped parts are usually welded together. Since the weld seams of bent pipes are mostly curved surfaces, which is not conducive to the conduction of inert gas, the contact range between the shielding gas and the welding place is relatively small during welding. Small, resulting in insufficient protection range, thus affecting the safety of welding. Contents of the invention [0003] The purpose of the present invention is to provide a gas shielding device for continuous welding of large-diameter elbows. By setting the sliding trolley to provide elastic force, the gas shielding box can always withstand the inner wall of the elbow body, and at the same time, an arc track is set in the elbow body , and thro...

AI Technical Summary

Problems solved by technology

[0002] For the production of bent pipes, two semi-circular arc-shaped parts are welded together. Since the weld seam position of the bent pipe is mostly a curved surface, which is not conducive to the conduction of inert gas, the contact range between the shielding gas and the welding place is relatively small during welding. Small, resulting in insufficient protection range, thus affecting the safety of welding

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