The invention discloses a multi-way reversing valve, a supporting leg oil cylinder control system and an automobile crane, and the multi-way reversing valve comprises a telescopic function selection valve which comprises a main oil inlet and a main oil return opening in one side and a rod cavity connecting oil opening and a rodless cavity connecting oil opening in the other side; an oil inlet in one side of each oil cylinder type selection valve is connected to a rodless cavity oil inlet and return path connected with the rodless cavity connecting oil port in parallel, and a working oil port in the other side of each oil cylinder type selection valve is used for being connected to a rodless cavity; the external control overload valve is connected with a working oil port of the oil cylinder type selecting valve and used for pressure maintaining or unloading of the working oil port, a first end pilot control oil way is connected between the first control end of the external control overload valve and the rod cavity connecting oil port, and the second control end of the external control overload valve is connected with the working oil port of the oil cylinder type selecting valve; and the control valve is arranged in the first end pilot control oil way. The control independence, the reliability and the user satisfaction degree of the supporting leg system can be improved.
本申请公开了一种多路换向阀、支腿油缸控制系统和汽车起重机,多路换向阀包括伸缩功能选择阀,包括一侧的主进油口、主回油口和另一侧的有杆腔连接油口、无杆腔连接油口;若干油缸类型选择阀,各个油缸类型选择阀的一侧的进油口并联连接至与无杆腔连接油口相连的无杆腔进回油路,油缸类型选择阀的另一侧的工作油口用于连接至无杆腔;外控过载阀,与油缸类型选择阀的工作油口相连并用于工作油口的保压或卸荷,外控外控过载阀的第一控制端与有杆腔连接油口之间连接有第一端先导控制油路,外控过载阀的第二控制端与油缸类型选择阀的工作油口连接;和控制阀,设置在第一端先导控制油路中。本申请可提升支腿系统的控制独立性、可靠性和用户满意度。
Multi-way reversing valve, supporting leg oil cylinder control system and automobile crane
多路换向阀、支腿油缸控制系统和汽车起重机
2023-10-27
Patent
Elektronische Ressource
Chinesisch
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