Non-cooling vertical welding seam induction heater and manufacturing method thereof

Abstract

The invention discloses a non-cooling vertical welding seam induction heater and a manufacturing method thereof. Inductors are designed into sheet-shaped veneering structures, two conductive inductorsare respectively arranged for a large-diameter pipe and a small-diameter pipe by taking welding seams as dividing lines, the two conductive inductors respectively adhere to the outer walls of the welding seams of the large-diameter pipe and the small-diameter pipe, and the heat treatment problem of a T-shaped welding joint is solved by separately controlling the two conductive inductors to ensurethe temperature uniformity when the welding seams are heated. According to the non-cooling vertical welding seam induction heater and the manufacturing method thereof, copper plates with a certain thickness are used as the conductive inductors, space is saved, a water cooling step is omitted, a traditional water cooling circulating system is not needed, and therefore the welding cost is saved; electroless Ni-P alloy plating on the surfaces of the conductive inductors is capable of effectively preventing oxidation during high temperature heating; and glass ribbons are bonded on the surfaces ofthe conductive inductors by taking a mixture of aluminum oxide and aluminum dihydrogen phosphate as a high-temperature binder, dual functions of electricity insulation and heat insulation are achieved, the integral strength of the conductive inductors is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to a non-cooling veneer induction heater, in particular to a non-cooling vertical weld induction heater and a manufacturing method, which is suitable for induction heating of intersecting line welds with complex shapes, and belongs to heat treatment technology field. Background technique [0002] A large number of steel pipes in thermal power plant boilers need to be welded. When two equal-diameter steel pipes are butt welded, a simple plane arc-shaped weld is formed. When a small-diameter steel pipe and a large-diameter steel pipe are cross-welded, a spatial intersecting line weld is formed. The traditional post-weld heat treatment of welded joints adopts flame heating or far-infrared heating. Flame heating is only used for post-weld heat treatment of individual reworked welded joints of medium and low alloy steel due to its low efficiency, great influence on operating skills (difficult to ensure uniform temperature and difficul...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a non-cooling vertical welding seam induction heater and its production method. By designing the inductor as a symmetrical sheet-like veneer structure, the temperature uniformity of the welding seam is guaranteed, and the traditional The heat treatment problem of the T-shaped welding joint that is difficult to deal with for copper pipes is suitable for plane heating, arc surface or other heating occasions that can be expanded into a plane

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