O-shaped three-position four-way reversing valve without leakage at middle position

• Main Authors: LIU YI'OU, ZENG BAOPING, LAI QIWEI, WU CHAO, GONG YAJUN, WU DI, MAO XUYAO, WANG QI, ZHANG BAOQING
• Format: Patent
• Language: Chinese; English
• Published: 04.12.2020
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; WEAPONS

The invention belongs to the technical field of hydraulic pressure, and provides an O-shaped three-position four-way reversing valve without leakage at the middle position. The O-shaped three-positionfour-way reversing valve is composed of a pilot K-shaped three-position four-way reversing valve body, four inserting pieces, three one-way valves with low opening pressure, a damping throttling opening, a valve block and the like. When the O-shaped three-position four-way reversing valve without the leakage at the middle position is located at the middle position, a pressure oil port and a loadoil port both have a good cut-off function and cannot leak mutually, the purpose of no leakage at the middle position is achieved, and the higher the working pressure is, the larger the sealing actingforce is; and when the O-shaped three-position four-way reversing valve without the leakage at the middle position is located at the working position, the through-flow state is normal, and normal working can be realized. 本发明属于