Middle and high pressure pilot type water pressure relief valve

• Main Authors: WU SHAN, LIU YINSHUI, LI ZHUANGYUN, YANG YOUSHENG, HE XIAOFENG
• Format: Patent
• Language: Chinese; English
• Published: 28.11.2007
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; CONTROLLING; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

A medium high pressure pilot-operated water pressure decompression valve, belonging to the hydraulic actuated element, avoids the problem of major spillage, corrosion, and serious cavitation corrosion when the prior oil pressure pilot-operated decompression valve is applicable to water medium. The utility model comprises a main valve connected with a pilot-operated valve, wherein the pilot-operated valve body is in turn arranged with a pilot-operated valve base, a pilot-operated spool, a pilot-operated valve spring and a regulating bar, the main valve body is arranged with a water inlet and a water outlet, the valve is provided with a valve pocket arranged with a main spool. The utility model is characterized in that (1) two sharp-border flow-throttling ports at the flow-throttling port portion simultaneously realize throttling action when the pilot-operated spool is engaged with the pilot-operated valve base, (2) the valve base hole of the pilot-operated valve base is arranged with a pilot-operated valve amo