| 摘要 |
<p>The hydraulic control unit of the bottom and aeration valves serves for bottom discharge of liquid and viscous substrates from railway cisterns with automatically protection against occurrence of underpressure during discharging and with exact signalization of opened and closed position of these valves. By the manual control-levers (3), through kinematical lever gear created by the driver (4), the gear-lever (5) and the swinging control-lever (6), is controlled the control bellows hydraulic cylinder (11) with closed hydraulic circumference in serial connection with the hydraulic bellows unit (33) of the aeration valve (29) and with the hydraulic bellows unit (35) of the bottom valve (30). The supporting head (12) of the control bellows hydraulic cylinder (11) is through the signal-lever (14), the signal draw rod (17) and the signal driver (20) kinematically connected with the pointers (22) of opened and closed position of valves and is bounded by blocking reaction by help of the double-arm lever (24) and by rotating of driver (4) of the manual control-levers (3).</p> |
