Rhombic internal support clamp for round pipe welding

Abstract

The invention discloses a rhombic internal support clamp for round pipe welding. The rhombic internal support clamp comprises at least one rhombic internal support unit, push cylinders corresponding to the rhombic internal support units one to one, two end covers, a main shaft and a plurality of pressing back-blowing modules, wherein the main shaft is arranged at the center of a round pipe, and both ends of the main shaft are respectively fixed in the centers of the two end covers; each push cylinder is fixedly arranged on the main shaft; each rhombic internal support unit comprises a positioning ring, a movable ring and at least one rhombic supporting frame; the positioning rings fixedly sleeve the main shaft; the movable rings sleeve the main shaft and can move back and forth along the main shaft along with the pushing of the corresponding push cylinders; one pair of diagonals of each rhombic supporting frame is respectively hinged to the corresponding positioning ring and the corresponding movable ring, and the other pair of diagonals of each rhombic supporting frame is respectively hinged to two supporting platforms; at least one pressing back-blowing module is fixed on each supporting platform. According to the rhombic internal support clamp, the internal protection problem for pipe welding is solved, the quality of welds is improved, and thermal deformation is relieved.

Description

technical field [0001] The present invention relates to the field of welding. Background technique [0002] Laser welding of pipe parts is widely used in various fields, pipe-to-pipe girth weld welding, and pipe hanger welding are widely used in China. At present, the butt welding method of pipes and pipes generally adopts outer clamp assembly, then removes the outer clamp, and then performs ring welding. The welding method of the pipe hanger is characterized by spot welding first and then direct welding. With these welding methods, there is no protection inside the weld seam, the weld seam is easy to collapse, and the product is easily deformed by heat, which affects the quality of the weld seam. At the same time, in the welding of the external parts of the pipe, since the external parts of the pipe are distributed in different positions, various welding protections are very inconvenient, especially to take protective measures from the inner back of the pipe, which is eve...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a diamond-shaped internal support fixture for round pipe welding, which can solve the internal protection problem of pipe welding, improve the quality of weld seam, and reduce thermal deformation

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