ANNULAR JET PUMP FOR FLOW-FEEDING SOLID MATERIAL

摘要

PURPOSE:To send out the sand and soil which are deposited on the bottom of a river by the water jet stream mixed with air by forming a double annular chamber in concentric form on the outside of a solid flowing feed chamber and connecting a high pressure water inlet to an inside annular chamber and connecting an air feeding port to an outside annular chamber. CONSTITUTION:An annular jet pump 3 connected with a solid flowing feed pipe 1 through a flange 2 is formed into a double annular chamber in concentric from on the periphery of a circular pipe 4 having an equal diameter to that of the solid flowing feed pipe 1, and a high pressure water pouring port 7 for jetting the jet water flow from an inside annular chamber 5 is connected with said chamber 5. A plurality of rectifying plates 8 for rectifying the poured high pressure water in the direction parallel to a pipe axis, annular contraction flow part 9 for smoothly contracting the high pressure water flow, and an annular jet nozzle 10 are installed in the inside annular chamber 5. An air feeding port 11 mixing air whose pressure is adjusted to a proper value is connected with an outside annular chamber 6, and a similar rectifying plate 12 and an air mixing inlet 14 for the jet water flow are formed inside the chamber 6.