Double-spool series high-pressure redundant sealing check valve

• Main Authors: JIA JINGWEI, CHEN WEIYU, WANG ZHIYONG, XIE NING, CHENG YAWEI, LEI HENG, FENG JUNHUA
• Format: Patent
• Language: Chinese; English
• Published: 03.04.2013
• 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 relates to a double-spool series high-pressure redundant sealing check valve, which comprises a housing, a spring retainer, a small spring, an outlet valve seat, an outlet spool, a big spring, an inlet valve seat and an inlet spool, the spring retainer, the small spring, the outlet valve seat, the outlet spool, the big spring, the inlet valve seat and the inlet spool are sequentially arranged in the housing, one end of the small spring is fixed on the spring retainer, the other end of the spring presses the outlet spool on the outlet valve seat and ensures that the outlet spool is tightly matched with the outlet valve seat, the big spring is sleeved on the outlet spool, one end of the big spring is fixed on the outlet spool, and the other end of the big spring presses the inlet spool on the inlet valve seat and ensures that the inlet spool is tightly matched with the inlet valve seat. The double-spool series high-pressure redundant sealing check valve adopts the double-spool series form, and the