Title:
REVERSING VALVE
Document Type and Number:
WIPO Patent Application WO/2023/077630
Kind Code:
A1
Abstract:
The present invention belongs to the field of hydraulic technology, and provides a reversing valve. The reversing valve solves the problems of a large settling volume of an existing oil cylinder in a pressure maintaining state, and of a hydraulic lock being inconvenient to unlock. The reversing valve comprises a hydraulic lock, a valve rod and a valve body which is provided with a working oil inlet and a main oil path, wherein the valve rod is provided with an unlocking surface and movably penetrates into the main oil path, the hydraulic lock comprises a spring and a lock seat which is fixedly connected to the interior of the valve body, the hydraulic lock further comprises an elongated lock cylinder located between the working oil inlet and the main oil path, one end of the lock cylinder can abut against the unlocking surface, the other end of the lock cylinder and the lock seat define a spring cavity in an enclosing manner, the spring is located in the spring cavity, the ends of the spring elastically abut against the lock seat and the lock cylinder, and a pressure relief hole in communication with the spring cavity and the main oil path is formed in the lock cylinder. The reversing valve has the advantages of improving the pressure maintaining effect of the oil cylinder, and reducing the settling volume of the oil cylinder in the pressure maintaining state.
Inventors:
HE XIANJIAN (CN)
ZHONG QI (CN)
CHEN JINGSHENG (CN)
GAO ZHENJIA (CN)
WANG JUN (CN)
ZHANG HUI (CN)
QIN YU (CN)
DU HUANGFANG (CN)
ZHONG QI (CN)
CHEN JINGSHENG (CN)
GAO ZHENJIA (CN)
WANG JUN (CN)
ZHANG HUI (CN)
QIN YU (CN)
DU HUANGFANG (CN)
Application Number:
PCT/CN2021/139558
Publication Date:
May 11, 2023
Filing Date:
December 20, 2021
Export Citation:
Assignee:
ZHEJIANG HAIHONG HYDRAULIC TECH CO LTD (CN)
International Classes:
F15B13/02
Foreign References:
| US3125120A | 1964-03-17 | |||
| CN208268487U | 2018-12-21 | |||
| CN107620810A | 2018-01-23 | |||
| US4520845A | 1985-06-04 | |||
| CN211901129U | 2020-11-10 | |||
| CN104179749A | 2014-12-03 | |||
| CN109162975A | 2019-01-08 | |||
| CN206904297U | 2018-01-19 | |||
| DE4028887A1 | 1992-03-19 |
Attorney, Agent or Firm:
TAIZHOU FANGYUAN PATENT ATTORNEY FIRM (GENERAL PARTNERSHIP) (CN)
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