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本文试验方法是在原有热电偶测温法的基础上进行了适当改进,对连续油管打底焊热循环进行试验测量。试验结果表明,该方法能够有效避免测量时,对中系统、水冷铜块、焊接机头对热电偶的影响,测量温度准确,温度能够和组织对应,解决了热电偶易被电弧熔断、测量位置受限制、测量不方便等问题。通过对管壁不同位置的热循环测量,得到部分热循环参数,验证了焊接热积累效应及起、灭弧处二次电弧作用,为连续油管热循环测定及焊接工艺制定提供了参考。
The test method in this paper is based on the original thermocouple temperature measurement method based on the appropriate improvements to the continuous tubing backing welding thermal cycling test measurements. The experimental results show that this method can effectively avoid the influence on the thermocouple of the middle system, the water-cooled copper block and the welding head during the measurement. The measurement temperature is accurate and the temperature can be corresponding to the tissue. Therefore, the method solves the problem that the thermocouple is easily fussed by the arc, Limited, inconvenient measurement and other issues. Some thermal cycling parameters were obtained by measuring the thermal cycling at different positions of the pipe wall. The heat accumulation effect of the welding and the secondary arc at the arc quenching were verified. The results provide reference for the determination of the thermal cycle of the coiled tubing and the development of the welding process.