“回火”是气焊、气割生产中经常碰到的不安全因素。浮桶式乙炔发生器的乙炔筒上天,就是由于乙炔和氧气混合,气体倒燃而引起的,也就是通常所说的“回火”。我们车间研制的水封罐、干式回火防止器等,都是防止乙炔和氧气混合气体倒燃的安全装置。本装置(见图)是已经回火而防止爆炸的安全装置。回火时,燃烧气体把胶皮顶 “Tempering” is often encountered in gas welding, gas cutting production insecurity. Acetylene tube float acetylene generator heaven, that is, due to acetylene and oxygen mixed gas caused by burning back, which is commonly referred to as “tempering.” Our workshop developed water seal cans, dry tempering preventer, etc., are to prevent acetylene and oxygen gas mixture of fire safety devices. This device (see photo) is a safety device that has been tempered to prevent explosion. Tempering, the burning gas to rubber top