Pilot bypass non-leakage self-control return valve

• Main Authors: GAO YANG, ZHENG XIAODONG, LI JIANGNAN, ZHANG WEI, ZHENG WEI, CHEN CHANG, DU DAXI
• Format: Patent
• Language: Chinese; English
• Published: 15.10.2019
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

The invention discloses a pilot bypass non-leakage self-control return valve, and relates to the technical field of protection valves. The pilot bypass non-leakage self-control return valve comprisesa valve body, a valve cover, a check valve, a pilot rod screw sleeve, a main path spring, a valve seat, a valve rod, a pilot sleeve, a pilot valve body, a pilot valve and a pilot valve spring, whereinthe valve cover is coaxially and fixedly arranged on an opening at the top end of the valve body; the valve seat is fixedly arranged at the axial position of the valve body; the side wall of the valve seat is provided with an opening; the valve rod is arranged at the axial position of the valve seat; the pilot valve body is arranged on the outer wall of the top end of the valve rod in a sleevingmode; the check valve is arranged at the top end of the pilot valve body in a sleeving mode; the pilot sleeve is arranged on the outer wall of the joint of the valve rod and the pilot valve body in asleeving mode; the pilot val