| 摘要 |
The present invention relates to a portable welding machine set. More specifically, a safe welding work can be done and an accident can be prevented by preventing the backflow of flame during the use of the welding machine while improving the mobility of a gas container for butane gas and the like or an oxygen container and enhancing conveninece of use. According to the present invention, the mobile portable welding machine set has an oxygen container and a gas container on one side of a movable frame and includes a backflow prevention valve coupled to a path wherein the fluid of the container flows. The backflow prevention valve comprises: a valve body for forming the exterior; a fluid flow path wherein the fluid flows through the inside of the valve body; a shutdown instrument for shutting one side of the fluid flow path in order to prevent the backflow of the fluid; and an elastic body for applying force to the shutdown instrument. |
