焊前管端电预热系统研发与设计

Development and Design of Electric Preheating System for Pipe End before Welding

传统焊前管端火焰预热有加热不均匀、在低温环境下出现液化水等缺点,导致无法达到焊接前预热的要求,故研发一种用电加热棒的形式均匀加热,以解决上述问题。根据实际工况,设计了单排8管的加热工装,并加入了温度控制、使用情况控制等功能,提高了焊前预热的质量。

The traditional flame preheating of pipe end before welding has the disadvantages of uneven heating and liquefied water in low temperature environment,which makes it impossible to meet the requirements of preheating before welding.Therefore,an electric heating rod is developed for uniform heating to solve the above problems.According to the actual working conditions,the heating tooling of single row 8 tubes is designed,and the functions of temperature control and service condition control are added to improve the quality of preheating before welding.