Small-diameter rack pipe after-welding heat treatment no-cooling induction heater and manufacturing method thereof

Abstract

The invention discloses a small-diameter rack pipe after-welding heat treatment no-cooling induction heater and a manufacturing method thereof. A small-diameter rack pipe electric conducting inductoris arranged in a welding line on the outer wall of a small-diameter rack pipe; the small-diameter rack pipe electric conducting inductor is of a flaky snakelike veneer structure, and consists of a left side flaky small-diameter rack pipe electric conducting inductor and a right side flaky small-diameter rack pipe electric conducting inductor, which both consist of multiple fan ring type structures; the number of the fan ring type structures is determined by the number of small-diameter pipes in small-diameter pipe rows; the inner ring radiuses b of the fan type rings are equal to the radiusesa of the small-diameter pipes and the wall thicknesses c of the small-diameter pipes; the left side flaky small-diameter rack pipe electric conducting inductor and the right side flaky small-diameterrack pipe electric conducting inductor are bonded on the outer wall of the small-diameter rack pipe in a semi-enclosed mode. The heater solves the problem of after-welding heat treatment of the small-diameter rack pipe difficultly solved in a traditional copper pipe and the inductor installation problem under complex conditions, reduces a traditional water cooling circulating system to save the construction cost, and improves the overall strength of the inductors to prolong the service life.

Description

technical field [0001] The invention relates to the technical field of heat treatment, in particular to a non-cooling induction heater for post-weld heat treatment of small-diameter row pipes and a manufacturing method thereof, which is suitable for post-weld heat treatment heating of heat-receiving surface tubes in thermal power plant boilers. Background technique [0002] The traditional post-weld heat treatment of welded joints of heating surface tubes in thermal power plant boilers adopts flame heating or far-infrared heating. Flame heating is difficult to ensure uniform temperature due to its low efficiency and great influence on operating skills. It is only used for post-weld heat treatment of individual reworked welded joints of medium and low alloy steels. Flexible resistance heating is suitable for pre-welding preheating, post-heating and post-welding heat treatment. Thermocouples are used for temperature measurement, and automatic temperature control equipment is u...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a non-cooling induction heater for post-weld heat treatment of small-diameter row pipes and its manufacturing method. This inductor is suitable for plane heating, arc surface or other heating occasions that can be expanded into a plane By designing the inductor as a sheet-like serpentine veneer structure, it solves the problem of post-weld heat treatment of small-diameter tubes that are difficult to handle with traditional copper tubes

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