A low-temperature flame automatic heating device for steel pipes

Abstract

The invention discloses a low-temperature flame automatic heating device for steel pipelines, which relates to the technical field of steel pipeline welding. The main points of the technical scheme are that it includes a first semicircular box and a second semicircular box; the second semicircular box has the same structure as the first semicircular box ; The first semi-circular box includes a semi-circular tube, a first fixed plate and a second fixed plate, two groups of rotating mechanisms are arranged between the first fixed plate and the second fixed plate; each group of rotating mechanisms includes a first connecting rod, a second connecting rod Rod, support bar, third connecting rod and fourth connecting rod; the end of the third connecting rod is hinged with the end of the second connecting rod; the end of the fourth connecting rod is rotatably installed with rollers; the first fixed plate and the second fixed plate A driving assembly for driving the rotation of the first connecting rod is arranged between them; two sets of adjusting assemblies for adjusting the height of the support bars are arranged between the first fixing plate and the second fixing plate. The invention solves the problem of affecting the preheating effect of the nozzle on the steel pipeline, and achieves the effect of facilitating the welding of the steel pipeline through the rotation of the semicircular box.

Description

technical field [0001] The invention relates to the technical field of steel pipe welding, more specifically, it relates to a low-temperature flame automatic heating device for steel pipes. Background technique [0002] At present, in order to ensure the welding performance of pipelines, especially in low-temperature environments in the field, it is necessary to preheat the steel nozzles before welding. [0003] The prior art can refer to the Chinese invention patent whose publication number is CN202598524U, which discloses a novel pipeline flame heater, which includes a skeleton arranged on the outside of the pipeline; The trachea is connected with the combustible gas, and there are a plurality of nozzles for igniting the combustible gas and heating the pipeline evenly distributed on the gas guide tube; a plurality of pulleys for rotating the skeleton are uniformly distributed on the outer surface of the pipeline, and the pulleys Supported by the brackets fixed on the fram...

AI Technical Summary

Problems solved by technology

[0004] However, the pulley and the frame are fixedly connected. When the diameter of the pipeline is too large, the distance between the pulley and the frame is fixed, which makes it inconvenient to close the frame of the two semi-circular structures, which in turn affects the impact of the nozzle on the steel frame during the rotation of the frame. Pipeline warm-up effect

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