多路阀是一个组合阀,由手动换向阀(7个)、安全阀(先导式压力阀)和单向节流阀等组成。根据控制油缸的特点,滑阀式换向阀上还装有一个或两个液控单向阀。为了便于理解,我们以割台升降油缸这一路为例,列举由多路阀引起的故障现象及其原因如下。 (1)割台提升到某一工作位置后,总不能定位。其原因多为:①油液 Multi-way valve is a combination of valve, the manual valve (7), safety valve (pilot pressure valve) and one-way throttle valve and other components. Depending on the nature of the control cylinder, one or two pilot operated check valves are also fitted on the slide valve. In order to facilitate understanding, we take the case of jacking cylinder this road as an example, cited by the multi-valve failure caused by the phenomenon and the reasons are as follows. (1) The header can not be positioned after being raised to a working position. The reasons are mostly: ① oil