| 摘要 |
PURPOSE:To enable the good checking function of a liquid pressure type diaphragm pump when sucking or delivering the concrete, by arranging a hopper for receiving the concrete at the upper opening of a driven chamber and a delivery nozzle movable up and down at the lower section of said hopper. CONSTITUTION:The interior of a casing is partitioned by a diaphragm 12 into an upper driven chamber 8 and a lower drive chamber 10 wherein a working liquid pipe 13 communicated with a working liquid pressurizing pump is connected to the drive chamber 10 and a hopper 6 for receiving the concrete is connected to the upper opening of the driven chamber 8. A delivery nozzle 7 having a bugle type valve section 7a at the lower end thereof is provided movably up and down at said opening wherein the valve section 7a is arranged to contact alternately against a packing 14 placed at the lower section of the hopper 6 and a valve body 22 secured to a perforated supporting table 21 so as to constitute an alternately functionable check valve. Said delivery nozzle 7 is moved up and down by a liquid pressure cylinder 15 interlocked with the supply/discharge control of the pressure liquid to the drive chamber 10.
|
