Welding grinding equipment for inner weld seam of steel pipe

Abstract

The invention discloses apparatus for grinding weld beading of an inside weld of a steel tube and relates to the technical field of welded steel tube production equipment. The apparatus comprises a main control box and a main mounting plate provided with a traveling device; cutter wheels and a camera are arranged on the lower side of the main mounting plate, a grinding device is arranged on the front side of the main mounting plate, and the cutter wheels, the camera and the grinding device all correspond to the inside weld of the steel tube; the main mounting plate is positioned and pre-tightened on the upper and lower inner walls of the steel tube through a pre-tightening device; a cutting blade of the grinding device is adjusted in position through a longitudinal adjusting device, a transverse adjusting device and a vertical adjusting device; the traveling device comprises a main driving motor, two driving wheels and two driven wheels, wherein the driving wheels and the driven wheels are mounted on the lower side of the main mounting plate; the main driving motor drives the driving wheels through a transmission part; the camera, the grinding device, the traveling device, the longitudinal adjusting device, the transverse adjusting device and the vertical adjusting device are all connected with the main control box. The pre-tightening device is used for positioning and pre-tightening the main mounting plate on the inner walls of the steel tube, and the camera is used for observing the position of the weld beading of the inside weld; the grinding motor is started, and relative positions of the device of the cutting blade and the weld are adjusted to complete grinding.

Description

technical field [0001] The invention relates to the technical field of production equipment for welded steel pipes, in particular to a welding bead grinding equipment for inner weld seams of steel pipes. Background technique [0002] With the continuous development of my country's long-distance pipeline business, the demand for oil and gas pipelines has increased significantly. With the expansion of the international market, traditional product types have gradually been replaced by diversified and multi-standard products, which has promoted the development of the pipe industry. rapid development and technological progress. The groove quality of the inner weld of the LSAW steel pipe after pre-welding will directly affect the quality of the inner welding process of the steel pipe, which is the most important part in the pipe industry. In the pre-welding of straight seam double-sided submerged arc welded steel pipes, due to factors such as welding parameters, groove blunt edge ...

AI Technical Summary

Problems solved by technology

In the pre-welding of straight seam double-sided submerged arc welded steel pipes, due to factors such as welding parameters, groove blunt edge joint, and steel plate edge deformation, the inner weld leaks during pre-welding, which will affect the tracking of the inner welding cantilever and the cutter wheel. Weld seam tracking will seriously affect the quality of inner groove welding, and even cause inner groove welding deviation, resulting in serious welding defects; therefore, it is necessary to check the inner groove of the steel pipe after pre-welding, and must Clean up in time to ensure that the internal welding is not affected

At present, steel pipes with an outer diameter of 457 mm or more are manually entered into the steel pipe for grinding, which not only increases the labor intensity of workers but is also very unsafe, but the minimum specification for steel pipes with an outer diameter of 406 mm , people of average size cannot enter at all, if there is pre-welding slippage, it will seriously affect the quality of internal welding

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