Search International and National Patent Collections

1. (WO2018058364) CONTAMINATION-PREVENTING MICRO-RESISTANCE SLOW-CLOSING CHECK VALVE AND INDUSTRIAL DRAINAGE SYSTEM

Pub. No.:    WO/2018/058364    International Application No.:    PCT/CN2016/100552
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Thu Sep 29 01:59:59 CEST 2016
IPC: F16K 15/18
Applicants: TAIYUAN UNIVERSITY OF TECHNOLOGY
太原理工大学
Inventors: KOU, Ziming
寇子明
WU, Juan
吴娟
ZHANG, Jing
张静
KOU, Yanfei
寇彦飞
ZHANG, Peng
张鹏
MENG, Sijia
孟思佳
Title: CONTAMINATION-PREVENTING MICRO-RESISTANCE SLOW-CLOSING CHECK VALVE AND INDUSTRIAL DRAINAGE SYSTEM
Abstract:
A contamination-preventing micro-resistance slow-closing check valve and an industrial drainage system are provided. The check valve comprises: a valve body (1), a valve disc (2), a stem (3), a piston cylinder, and a cushioning mechanism. A first chamber (A) and a second chamber (B) communicating with each other and for a working fluid medium to pass through are disposed in the valve body (1). The cushioning mechanism can cushion motion of a piston (20). A medium chamber at one end, away from the stem (3), of the piston cylinder communicates with the second chamber (B). An extensible isolating member is disposed in the medium chamber and is used for isolating a damping medium in the piston cylinder from the working fluid medium from the second chamber (B). The check valve can greatly reduce a water hammer phenomenon, and the damping medium is isolated from the working fluid medium by the isolating member, avoiding failure of the check valve resulting from blockage caused by impurities in the working fluid medium, and avoiding contamination of the working fluid medium by the damping medium.