| 摘要 |
PURPOSE:To permit perfect cleaning of a slurry feeding valve by connecting a cleaning pipe of which one edge side is connected to a cleaning valve, to the pipe in the vicinity of the slurry feeding valve provided in a feeding pipe, with the other edge side in eccentric state. CONSTITUTION:The center position A of a cleaning pipe 14a is set in essentric state (eccentricity) relative to the center position B of a slurry feeding pipe 15a. As a result a swirly flow in generated in the cleaning water which jets- out into the slurry feeding pipe 15a from the cleaning pipe 14a, and the force for swirling-up soil and sand in the slurry which flows in the slurry feeding pipe is increased, and the soil and sand staying in the pipe arranged between the connection port for both pipes and a slurry feeding valve Sa can be removed completely. |
