SIPHON TYPE VERY HIGH HEAD FLUID TRANSPORTATION SYSTEM

PURPOSE:To obtain a siphon type very high head fluid transportation system which is suitable to very high head by installing a circulation pipeline and a pressure vessel which feeds coarse grains into the circulation pipeline and a slurry pump which pressure-feeds a fluid and a separator. CONSTITUTION:Coarse grains, such as earth and sand produced at an underground excavation site 2 are cast into a hopper 5 by means of a belt conveyer 18. A fixed amount of coarse grains from the hopper 5 are supplied to a pressure chamber 6 by opening a pressure cover 7. Then, in the pressure chamber 6, pressure water is injected to the grains by a pressure regulation deice 15, thereby mixing the coarse grains and controlling the pressure so as to obtain a specified pressure. The coarse grains are supplied to a screw conveyer 13 by way of a pressure chamber 9 by opening a pressure cover 10. Then, a proper amount of coarse grains are fed into a circulation line 1 on a butch basis and transported to the ground with pressure water pressure-fed by a slurry pump 22. The coarse grains are separated from the water by a separation device 19. The separated water is supplied to the slurry pump 22 so that it may be used for recirculation. This construction makes it possible to provide a fluid transportation system which is proper to very high head by using the theory of siphon.