Title:
SYNCHRONOUS CONTROL VALVE, HYDRAULIC CONTROL SYSTEM AND WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/103208
Kind Code:
A1
Abstract:
A synchronous control valve, comprising a shuttle valve (12) and two first load sensitive valve groups (11). Each first load sensitive valve group comprises a reversing valve (111) and a differential pressure valve (112); the differential pressure valve is connected in series to a conduction oil path of the reversing valve; a first end and a second end of the shuttle valve are connected to the two first load sensitive valve groups in a one-to-one correspondence, and a third end of the shuttle valve is separately connected to feedback ends of two differential pressure valves. Also disclosed are a hydraulic control system and a work machine. The synchronous control valve simplifies an oil path structure while synchronously driving two oil cylinders, thereby improving the reliability of the synchronous control of the two oil cylinders.
Inventors:
LIU YUXIANG (CN)
ZHAO HANQING (CN)
HE QINQIU (CN)
ZHAO HANQING (CN)
HE QINQIU (CN)
Application Number:
PCT/CN2022/081263
Publication Date:
June 15, 2023
Filing Date:
March 16, 2022
Export Citation:
Assignee:
HUNAN SANY HUAYUAN MACHINERY CO LTD (CN)
International Classes:
F15B11/17; F15B11/22; F15B13/06; F15B21/041
Foreign References:
| CN105626121A | 2016-06-01 | |||
| CN110131226A | 2019-08-16 | |||
| CN108980126A | 2018-12-11 | |||
| CN107191423A | 2017-09-22 | |||
| CN110500330A | 2019-11-26 | |||
| CN203717513U | 2014-07-16 | |||
| CN102650304A | 2012-08-29 | |||
| US5077972A | 1992-01-07 | |||
| EP0844198A1 | 1998-05-27 |
Attorney, Agent or Firm:
YOULINK INTELLECTUAL PROPERTY LAW FIRM (CN)
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