Pipeline welding heating device as well as welding device and method

Abstract

The invention relates to a pipeline welding heating device as well as a welding device and method. The heating device comprises a circular sliding contact line; the sliding contact line and a to-be-welded pipeline are arranged coaxially; the to-be-welded pipeline can penetrate through the sliding contact line; the sliding contact line is fixedly connected with a support; the support is used for fixing the sliding contact line; the sliding contact line is connected with a current collector; the current collector can slide along the sliding contact line; the current collector is fixedly connected with a connecting plate; the connecting plate is fixedly connected with the to-be-welded pipeline; the to-be-welded pipeline can rotate to drive the current collector through the connecting plate tomove along the sliding contact line; the current collector is connected with a heater through a heat treatment wire; the heater is fixed to the to-be-welded pipeline and is used for heating the to-be-welded pipeline; a connector is arranged at a joint of a sliding contact device; and the connector is connected with a heat treatment machine. By the aid of the heating device, continuous heating canbe performed during pipeline welding, so that the welding quality is high.

Description

technical field [0001] The invention relates to the technical field of welding equipment, in particular to a pipe welding heating device, a welding device and a method. Background technique [0002] During the automatic welding process of the pressurized pipeline in the power station, the pipeline rotates with the machine tool. For the pipeline that needs to be preheated by electric heating before welding, the equipment and tools used in the traditional electric heating preheating method cannot follow the rotation of the pipeline. It is impossible to continue electric heating preheating, so the only alternative is to use flame preheating or electric heating preheating before welding (preheating to reach the temperature first, then heating the power line and temperature measuring line when welding starts, etc. The rotating facilities are all removed), relying on the arc temperature to maintain the required preheating temperature of the pipeline itself during welding. [0003...

AI Technical Summary

Problems solved by technology

[0002] During the automatic welding process of the pressurized pipeline in the power station, the pipeline rotates with the machine tool. For the pipeline that needs to be preheated by electric heating before welding, the equipment and tools used in the traditional electric heating preheating method cannot follow the rotation of the pipeline. It is impossible to continue electric heating preheating, so the only alternative is to use flame preheating or electric heating preheating before welding (preheating to reach the temperature first, then heating the power line and temperature measuring line when welding starts, etc. The rotating facilities are all removed), relying on the arc temperature to maintain the required preheating temperature of the pipeline itself during welding

[0003] The inventor found that the existing technology cannot continue to heat the workpiece to be welded, cannot accurately control the preheating temperature, and cannot meet the requirements of the regulations, especially for some materials that are sensitive to the preheating temperature, which greatly increases the probability of defects

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