| 摘要 |
PROBLEM TO BE SOLVED: To enable the use of a pressure-conveyance pump by crushing excavated mudstones and clay blocks. SOLUTION: A crushing chamber 15 is installed to communicate with the discharge opening 4b of a soil discharging screw conveyer 4. A rotary shaft 17 rotated by a hydraulic motor 14 is installed on the downstream side of the crushing chamber 15. Six rows of crushing blades 19 in which two crushing blades 19a, 19b extending oppositely per one row, with the phases shifted by 60 degree from each other, are fitted to the rotary shaft 17. Between the rows of the blades 19 downstream from the rotary shaft 17, fixed rods 20 are fitted to extend perpendicularly to the rotary shaft 17. Mudstones and clay blocks in earth and sand supplied from the screw conveyer 4 are crushed by the and the fixed rods 20. As a result, a pressure conveyance pump is prevented from being clogged with the mudstones and the clay blocks. |
