具有保压过程过载保护功能的液压换向阀

Hydraulic reversing valve capable of conducting overload protection function in pressure maintaining process

Abstract

本实用新型涉及一种具有保压过程过载保护功能的液压换向阀,包括液压换向阀阀体与油缸,液压换向阀阀体的油口接入油箱内,还包括安全溢流阀与梭阀,油缸的油口接出的油管一份为二,一条支路接入液压换向阀阀体内,另一条支路接入梭阀内,梭阀的出油口接安全溢流阀的进油口,安全溢流阀的出油口通过管道接入液压换向阀阀体内;进油口连出的管路上安装有单向阀,单向阀的出口端接出的油管一份为二,一条支路接入液压换向阀阀体内,另一条支路接入梭阀内。本实用新型具有保压过程过载保护功能,避免了爆缸或者是系统中某一薄弱环节损坏的情况,扩大了液压换向阀使用环境,使得液压换向阀更加安全可靠。
The utility model relates to a hydraulic reversing valve capable of conducting an overload protection function in a pressure maintaining process, which comprises a valve body of the hydraulic reversing valve, an oil cylinder, a safety overflow valve and a shuttle valve, wherein the oil opening of the valve body of the hydraulic reversing valve accesses the inside of an oil tank; an oil pipe led from the oil opening of the oil cylinder is divided into two paths, namely a path to the inside of the valve body of the hydraulic reversing valve and a path to the inside of the shuttle valve, the oil outlet of the shuttle valve is connected with the oil inlet of the safety overflow valve, and the oil outlet of the safety overflow valve is connected to the inside of he valve body of the hydraulic reversing valve through a pipe; and a pipe led out from an oil inlet is provided with a one-way valve, and an oil pipe led out from the outlet end of the one-way valve is divided into two paths, namely a path to the inside of the valve body of the hydraulic reversing valve and a path to the inside of the shuttle valve. The hydraulic reversing valve is cable of conducting the overload protection function the pressure maintaining process, avoids cylinder explosion or damage of a certain weak link in the system, can be used in new environments and is more safe and reliable.

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    CN-101922480-ADecember 22, 2010无锡英特帕普威孚液压有限责任公司Hydraulic reversing valve with overloading protecting function during pressure maintaining
    CN-101922480-BMay 30, 2012无锡英特帕普威孚液压有限责任公司具有保压过程过载保护功能的液压换向阀