The invention provides a hydraulic lifting valve and a hydraulic lifting system, and relates to the technical field of hydraulic system control. The hydraulic lifting valve comprises a valve seat, a valve rod and a pressure relief valve element, the valve seat is provided with an oil inlet, an oil outlet and a first oil drainage port, and a main oil way, a first transition oil way, a second transition oil way, a load oil supply way and a first oil drainage way are arranged in the valve seat. When the oil pressure in the hydraulic lifting valve exceeds a set threshold value, hydraulic oil entering a main oil way can enter a first valve element cavity through a first oil guide groove in the outer surface of a valve rod, and the hydraulic oil can drive a pressure relief valve element to move so as to conduct the main oil way and a first oil drainage way; and therefore, hydraulic oil can be drained from the first oil drainage port communicated with the first oil drainage path. According to the structural design, an oil drainage pipe does not need to be arranged outside the oil tank, hydraulic oil can flow back into the oil tank from the oil way in the valve seat, and therefore the purpose of reducing the oil pipe area of the hydraulic lifting system is achieved by reducing the oil drainage pipe.
本申请提供一种液压举升阀及液压举升系统,涉及液压系统控制技术领域。液压举升阀包括阀座、阀杆以及泄压阀芯,阀座设置有进油口、出油口和第一泄油口,阀座内设置有主油路、第一过渡油路、第二过渡油路、负载供油路以及第一泄油路。当液压举升阀内的油压超过设定阈值时,进入到主油路中的液压油会通过阀杆外表面的第一导油槽进入到第一阀芯腔室内,并且,液压油会驱动泄压阀芯进行移动以导通主油路与第一泄油路,从而使得液压油能够从与第一泄油路相连通的第一泄油口进行泄油。此种结构设计无需在油箱外设置泄油管,液压油可以从阀座内部的油路回流到油箱中,从而通过减少泄油管的方式实现减小液压举升系统的油管面积的目的。
Hydraulic lifting valve and hydraulic lifting system
液压举升阀及液压举升系统
2024-05-24
Patent
Elektronische Ressource
Chinesisch
IPC: | F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |
Europäisches Patentamt | 2023
|Europäisches Patentamt | 2022
|