Pilot valve

• Main Authors: XU DELU, QIU WEI, QIU XIANQIANG, LOU ZENG
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2022
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

A pilot valve comprises an upper connector, a rod plug, a push ring, a lining, a spring, an outer cylinder and a lower connector. Wherein the upper part and the lower part of the outer cylinder are respectively connected with the upper joint and the lower joint through screw threads, the rod plug, the push ring, the bushing and the spring are positioned inside the outer cylinder, the bushing is propped against the lower joint, the spring is inserted into the bushing and propped against the push ring, and the rod plug is inserted into the push ring. By means of the pilot valve, the hydraulic oscillator can achieve the two-way function that the hydraulic oscillator needs to be blocked and does not need to be opened. 一种先导阀，其包括：上接头、杆堵、推环、衬套、弹簧、外筒、下接头；其中外筒上下分别通过丝扣与上接头和下接头连接，杆堵、推环、衬套、弹簧位于外筒内部，其中衬套顶放于下接头，弹簧插入衬套内并顶住推环，杆堵插入推环内。本实用新型的先导阀使得液压振荡器可以实现需堵则堵，无需则开的双向功能。