[问]:割炬、焊炬使用久了会被乙炔炭黑堵塞,我们曾用硫酸或强碱清洗也不解决问题,请问有何解决方法?(田亢洪)[答]:一般乙炔炭黑堵塞多发生在割炬、焊炬的“后部接体”或“焊嘴接头”两个部位,见附图。乙炔炭黑堵塞物在堵塞处形成一层厚皮,象水壶中 [Q]: cutting torch, torch used for a long time will be blocked acetylene black, we have used sulfuric acid or alkali cleaning does not solve the problem, may I have any solution? (Tian Kang Hong) [A]: General acetylene carbon Occurred in black torch cutting torch, welding torch, “the rear body” or “nozzle joints” in two parts, see photo. Acetylene black blockage at the plug to form a thick layer of leather, like a kettle