| 摘要 |
A double-acting type piston valve is provided to secure a sufficient working space by improving the structure of a switch valve, thereby facilitating check and replacement of an abrasion plate and an abrasion ring. A double-acting type piston valve comprises a pair of pumping tubes extended from one side of a hopper(110) in parallel with each other, cylinders respectively installed on the pumping tubes, and a switch valve(200) consisting of a switch pipe(210) for selectively connecting one of the pumping tubes to a discharge tube(130) installed at the other side of the hopper and a switch cylinder(220) for driving the switch pipe. A discharge tube-sided end of the switch pipe is protruded to an outside of the hopper. The switch cylinder is installed outside a discharge tube-sided end of the hopper such that the switch cylinder is connected to a switch clamp fixed to the switch pipe, thereby securing a sufficient space to repair the switch valve and install component parts. Further, the switch clamp is a lever type of clamp having a lever projected in an outside direction. |
