HYDRAULIC PRESSURE ADJUSTING VALVE FOR DROP HOSE FOR ALLOWING SUPPLY OF HIGH-PRESSURE WATER FROM ATMOSPHERIC PUMP UNDER PREDETERMINED PRESSURE TO DROP HOSE

摘要

PURPOSE: A hydraulic pressure adjusting valve for drop hose allowing supply of high pressure water from an atmospheric pump under predetermined pressure to the drop hose is provided. It has simple construction, can control the flow of water regularly regardless of water pressure and prevents the destruction of the drop hose caused by high pressure water. CONSTITUTION: The hydraulic pressure adjusting valve(100) is equipped with a water feed passage in a hose connecting device(110) connecting a branch hose and one end of a drop hose by clamping. The water feed passage is formed with a large-diameter water feed passage(120a) and small-diameter water feed passage(120b) which have a step-height sheet. A U-shaped elastic cup(200) with a hook jaw(210) is inserted into the small-diameter water feed passage with a specified clearance and prevented from release by a restraining ring(300). A protruded ring jaw(150) is formed in the small-diameter water feed passage. The step-height sheet is formed with a concavo-convex sheet(140) in which protrusions(141) and grooves(142) are repeatedly radially formed.