中国液压协会 关键词：起重机；支腿缸；换向阀；过载阀；单向阀 [gap=521]Key Words: crane； suport oil cylinder； overload valve； holding valve； revering valve
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基于以上现象，对控制支腿缸的换向阀结构进行了改进，通过在原有换向阀的基础上增加一过载阀及4个单向阀解决了上述问题。
Whereas clause, the structure of valve had been improved, holding valve and over load valve had been added in it. The problem had been resolved by means of above.
安装在主管线内，防止上游压力降到预置最小压力以下。电磁阀的过载平衡功能使其能够进行电气开-关操作。
Installed in a mainline it prevents upstream pressure from dropping below a preset minimum. Solenoid override of the sustaining function allows for electrical on-off operation.
安全阀过载保护。推杆可调，使货叉保持平衡。
Over-load protection Full adjustable push rods under forks ensure stability of forks.
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