众所周知,用普通氧-乙炔割炬只能切割一般钢材,切割铸铁和不锈钢是有困难的。为解决用氧-乙炔割炬切割铸铁和不锈钢,我们在割炬上加装了一个电磁气阀,以达到断续地输送切割氧的目的。其工作原理为:当割炬的预热火焰将工件加热到熔化状态时,气阀由事先调正好的时间继电器控 As we all know, with ordinary oxygen - acetylene torch can only cut the general steel, cutting cast iron and stainless steel is difficult. In order to solve the use of oxygen - acetylene torch cutting of cast iron and stainless steel, we have installed in the torch solenoid valve to achieve intermittent delivery of cutting oxygen purposes. Its working principle is as follows: When the torch preheat the flame heating the workpiece to the melting state, the valve is adjusted by the time before the relay control