Discrete device and discrete method for heating straight welded pipe by coils

Abstract

The invention discloses a discrete device and a discrete method for heating a straight welded pipe by coils. The device comprises a discrete induction heating device, a temperature measuring feedbackdevice and a control console. The discrete induction heating device comprises a coil bracket, a coil fixing sleeve, a control slide block and five horizontally arranged induction coils adjustable in separation distance. Each induction coil is controlled to be adjusted by the control console. The temperature measuring feedback device comprises an outer wall temperature measuring device and an innerwall temperature measuring device. The outer wall temperature measuring device comprises five infrared thermodetectors L1-L5. The inner wall temperature measuring device comprises five infrared thermodetectors L6-L10. Dynamic temperature measurement on heating points in various stages in welded pipe welding seam is carried out constantly, the control console receives a temperature feedback signalof the temperature measuring feedback device to control and adjust the positions of the induction coils constantly, and finally, the inner and outer temperatures at the weld seam of the welded pipe meet a heat treatment temperature demand synchronously, so that the heat treatment effect is optimized and the heat treatment quality is improved.

Description

technical field [0001] The invention relates to the technical field of heat treatment at welded seams of welded pipes, in particular to a device and method for heating straight seam welded pipes with discrete coils. Background technique [0002] In recent years, intermediate frequency induction heat treatment has developed rapidly with the joint efforts of workers in induction heat treatment equipment manufacturing and application enterprises due to its clean production method of low energy consumption, fast temperature rise and less pollution. Intermediate frequency induction heat treatment has been used in various It is widely used in the heat treatment method of various workpieces. Aiming at the heat treatment method of the welded seam of the welded pipe, the factory currently uses a heat treatment device with induction heating on the inner and outer sides of the disc coil. The workpiece after intermediate frequency induction heat treatment cannot guarantee the uniform t...

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Problems solved by technology

Aiming at the heat treatment method of the welded seam of the welded pipe, the factory currently uses a heat treatment device with induction heating on the inner and outer sides of the disc coil. The workpiece after intermediate frequency induction heat treatment cannot guarantee the uniform temperature rise of the heating position along the thickness direction, and cannot accurately control the heat treatment quality

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