| 摘要 |
PURPOSE:To enable sequential discharge of pulverized substance inside a tank wherein pulverized substance inside the tank is discharged under pressure by feeding compressed air by sequentially actuating a plurarity of solenoid valves every time when an internal pressure of the tank is reduced under a set level. CONSTITUTION:When this invension is embodied in a three-feed pulverized substance transportation truck, a diaphragm valve which consists of a diaphragm 28, a valve body 29 and a spring 30 is disposed at the lower end of each of bleeze pipes 9-11 which are opposite to the lowest parts of three recesses 3-5 having inclined faces inside the tank 2. A compressed air chamber 33 is defined by a porous plate 22 and a slide belt 23 at the bottom inside the tank while a valve chest 31 is defined between the bottom thereof and a cylindrical member 25 which encircles the diaphragm valve. Both of the chest 33 and the chamber 31 are connected by a pipe 35 which is provided with a solenoid valve 34. The solenoid valve 34 is actuated by a pressure switch not illustrated and the valve chest 31 is opened to atmosphere to open the valve body 29, thus enabling pulverized substance to be evacuated from the pipes 9-11. |
