Title:
WORKING LINK, VALVE PORT INDEPENDENT CONTROL TYPE MULTI-WAY VALVE, AND ENGINEERING MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/092871
Kind Code:
A1
Abstract:
A working link, a valve port independent control type multi-way valve, and an engineering machine. The working link can realize independent control over an oil inlet and an oil outlet, and can use a manual control mode, an electro-hydraulic proportion control mode, and a CAN bus control mode. The problem of the mechanical fixation of an oil inlet and an oil outlet of a traditional multi-way valve is solved, and the degree of freedom for control is increased; and the problems of control over an existing port-independent valve being complex and unstable are solved; moreover, the structure is simple, the flow control precision is high, the cost is low, and the switching between the valve port independent valve and a traditional pre-compensation load-sensitive multi-way valve can be achieved. Flow calculation control and pressure calculation control can be realized on the premise of not changing the structure of a valve body, a second main valve core (2) is replaced with a plug (12), and the pattern of a throttling opening on a first main valve core (1) is changed, such that the function of a pre-compensation load-sensitive multi-way valve of a traditional structure can be achieved by means of the working link, thereby improving the performance of a valve port independent control type multi-way valve and even of the engineering machine.
Inventors:
SUN HUI (CN)
WANG XIAOJUAN (CN)
LIU CANJIE (CN)
SUN ZHENJU (CN)
ZHANG ZHIWEI (CN)
WANG XIAOJUAN (CN)
LIU CANJIE (CN)
SUN ZHENJU (CN)
ZHANG ZHIWEI (CN)
Application Number:
PCT/CN2022/077059
Publication Date:
June 01, 2023
Filing Date:
February 21, 2022
Export Citation:
Assignee:
JIANGSU ADVANCED CONSTRUCTION MACHINERY INNOVATION CENTER LTD (CN)
International Classes:
F15B13/02; F15B21/02
Foreign References:
| CN108252979A | 2018-07-06 | |||
| CN109441905A | 2019-03-08 | |||
| CN106762916A | 2017-05-31 | |||
| CN105840574A | 2016-08-10 | |||
| US20200386245A1 | 2020-12-10 |
Attorney, Agent or Firm:
NANJING ZONGHENG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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