中频感应加热在管道外补口中的应用
Electric Induction Heating of Pipe Joint coating
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- DOI:
- 作者:
- 王林章
Wang Lin Zhang
- 作者单位:
- 石油部管道科学研究院
- 关键词:
- 摘要:
- 中频感应加热设备用于管道外补口,其原理是将中频感应加热线圈套在钢管焊口处。该线圈是一个多匝电感线圈,利用中频提供的电流,在铜管壁内产生交变磁场,交变磁场产生的热磁滞损耗、涡流损耗使钢管发热。中频感应加热具有如下特点:1.加热迅速,补口加热时间1～2分钟,就能将管道焊口加热到所需温度;2.钢管圆周温度均匀;3.轴向存在温差,这是补口所需要的;4.温度调节方便,控制准确;5.不损伤焊口外的原涂层。因此,笔者认为中频感应加热是管道外补口较为理想的加热方法。
Electric induction heater is used for coating external joint of pipeline .The principle is to putthe electric induction heating coil around the weld of steel pipe .I t is a m ulti-loopselectric induction coil .Using the current supplied by electric induction, a alternating megneticfield is formed into the wall of steel pipe, The magnetic hysteresis loss, eddy current loss makepipe weld heating, The electric induction heater has following advantages:1.fast heating speed,the reguired temperature reached w ithin 1-2mumtes:2.uniform temperature around weld ofsteel pi pe:3.temperature differential exiting in。xil direction:such tem perature differentialrequired by joint coating: .i.easy temperature setting and controlling;.no damage to the initialcoating of weld zone .The anther considers the process is a i;tea heating method far coatingexternal joint of pipeline.1987,1(1): 21-23