Device capable of conveniently improving girth welding quality of pipelines

Abstract

The invention discloses a device capable of conveniently improving the girth welding quality of pipelines. The device comprises gas nozzles, a gas pipeline and a gas storage tank which communicate with one another in sequence, and further comprises a bent plate, a supporting block, rolling wheels and a motor which are connected in sequence, wherein the bent portion of the bent plate is connected with the supporting block; baffles are arranged at the two opposite open ends of the bent plate, the baffles are sector-shaped plates, and the curved edges of the baffles are far away from the bent portion of the bent plate; the jet ends of the gas nozzles penetrate through the bent plate and then are located on the side, away from the supporting block, of the bent plate; and the motor is used for driving the rolling wheels to rotate. The jet ends of the gas nozzles right face the welding portion of a welding gun, and meanwhile the curved faces of the baffles make contact with the inner wall of a pipeline to be welded, shielding gas jetted from the gas nozzles is concentrated between the bent plate and the baffles, gas is provided for the side, away from the welding gun, of a weld joint, thus, the welding portion can be protected, the welding portion of the side, without shielding gas, of the pipeline is prevented from being oxidized or nitriding by air, and the welding quality is improved.

Description

technical field [0001] The invention relates to a shielding gas replenishment device for welding, in particular to a device for improving the quality of pipeline annular welding. Background technique [0002] In the petroleum manufacturing industry, it is often applied to large pipelines. During the manufacturing process of large pipes, processes such as blanking, grinding, cutting, coiling and welding are involved. Circular welding is often designed in welding, such as butting two pipes. In the butt welding of two pipes, base the parts of the two pipes that need to be welded, and clamp the end faces of the two pipes far away from the welding part with relevant fixtures, start the welding torch, and then rotate the fixture, so that the pipes revolve around their own axis Complete the ring weld. When welding, it needs to be filled with gas around the weld seam to ensure the welding quality. The shielding gas can be carbon dioxide, argon, etc. It is mainly used as a shield...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a device that facilitates the improvement of the pipe annular welding quality, and solves the problem that when the pipe is butt welded, only a certain amount of gas is sprayed around the welding torch, so that the welding part on the side of the pipe without protective gas is oxidized or nitrided by air, which has a negative impact on the welding quality. Greatly negatively affects and reduces the service life of the pipeline

Images