Butt welding auxiliary device

Abstract

The invention discloses a butt welding auxiliary device which comprises a positioning connecting sleeve body and an annular positioning part which are arranged on two pipe bodies needing to be in butt joint in a sleeving mode, the positioning connecting sleeve body and the annular positioning part are connected with a supporting seat, and the butt welding auxiliary device is structurally characterized in that the annular positioning part comprises an annular plate and a combined cylinder fixed to one end face of the annular plate; the combined cylinder and the annular plate are coaxially arranged, and the extension cylinder is connected with a rotatable annular disc; the pipe fitting butt joint device has the beneficial effects that when two pipe fittings are in butt joint, the opposite-pull rod arranged around the central axis of the annular disc penetrates through the annular disc, and the opposite-pull rod is parallel to the central axis of the annular disc, so that after the opposite-pull rod is connected with the positioning rotary disc, the two pipe fittings with the same diameter can be in butt joint to form a straight pipe fitting; when two pipe fittings are subjected to butt welding, deformation of the pipe fittings can be limited through connection of the multiple opposite-pull rods, the annular plate and the positioning rotary disc, and therefore the problem that large deformation is generated after welding is avoided.

Description

technical field [0001] The invention belongs to the field of welding fixtures, and in particular relates to an auxiliary device for butt welding of pipe fittings. Background technique [0002] When connecting steel pipe fittings, the problem is that it is impossible to ensure that the central axes of two pipe fittings of the same diameter are on the same straight line, that is, two steel pipe fittings can form a straight pipe after butt jointing, even if it is difficult to connect two steel pipe fittings. After being placed in a state close to a straight pipe, due to the influence of internal stress during the welding process, it is easy to cause the two pipe fittings to fail to form a straight pipe fitting when the welding is completed, which requires subsequent processing, which is troublesome. Although in the prior art, the two pipe fittings The parallel baffles are fixed on the processing plate, and then the two pipes are placed in the area between the two baffles, in th...

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Problems solved by technology

[0002]When steel pipe fittings are butted, the difficulty is that it is impossible to ensure that the central axes of two pipe fittings of the same diameter are on the same straight line, that is, after the two steel pipe fittings are butted, they can To form a straight pipe fitting, even if it is difficult to place the two steel pipe fittings to be close to the straight pipe state, due to the influence of internal stress during the welding process, it is easy to cause the two pipe fittings to fail to form a straight pipe fitting when the welding is completed, so it is necessary to Subsequent processing is more troublesome, although in the prior art, two parallel baffles are fixed on the processing plate, and then two pipes are placed in the area between the two baffles, in this way to promote the butt joint of the pipes Finally, straight pipe fittings are formed, but this method directly affects the smoothness of the welding operation, and even leads to incomplete welding. After the complete welding cannot be performed, if the pipe fittings are removed, it will cause deformation due to the influence of external forces , also requires subsequent processing and correction, resulting in low docking efficiency

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