Hydraulic external line-up clamp for steel gas pipeline

Abstract

The invention relates to the technical field of welding auxiliary tools, in particular to a hydraulic external line-up clamp for a steel gas pipeline. The hydraulic external line-up clamp comprises apositioning plate, a central positioning element, lateral positioning elements and a synchronous feeding mechanism, wherein the central positioning element comprises two symmetric middle half rings and a first hydraulic cylinder; the two middle half rings are hinged; the articulated shafts of the two middle half rings are arranged on the upper surface of the positioning plate; the first hydrauliccylinder can drive the two middle half rings to be tightly abutted; the two lateral positioning elements are symmetrically arranged on two sides of an axial line direction of each middle half ring; the positioning plate is fixedly provided with spacing rods; the two spacing rods are independently positioned on two sides of the central positioning element and are positioned on lateral sides of theaxial line direction of lateral half rings; and the synchronous feeding mechanism can drive the two lateral positioning elements to synchronously move to a direction near or far away from the centralpositioning element relative to the positioning plate. According to the hydraulic external line-up clamp, a function that a worker can conveniently regulate a welding line between two pipelines is realized.

Description

technical field [0001] The invention relates to the technical field of welding auxiliary tools, in particular to a steel gas pipeline hydraulic external mouthpiece. Background technique [0002] Large-diameter steel gas pipeline is an important means of gas transportation. A large amount of welding work is required in the construction of gas pipeline. At present, the preparatory work before welding construction of large-diameter steel gas pipeline mainly includes nozzle correction, assembly and welding seam The gap adjustment is mainly completed in two ways, one is done manually, that is, the pipe layer is used to cooperate with the manual external counterpart, and the hydraulic jack or the adjustment bolt is manually operated to complete the correction, alignment and weld gap of the nozzle Adjustment; the other is completed in a semi-automatic way, that is, the pipelayer is used to cooperate with the internal counterpart, and the internal counterpart performs automatic tens...

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the above-mentioned prior art is that the pipelayer lifts the two pipes and places them horizontally, and the staff manually adjusts the two pipes so that the axial and radial directions of the two pipes can be aligned, and then work The personnel need to leave a welding seam between the two pipes so that the staff can weld the two pipes through the welding torch. However, the manual adjustment of the axial distance between the two pipes by the staff is prone to errors, thus making the distance between the two pipes The width of the welding seam is not easy to control accurately, so it may affect the welding work

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