逻辑阀亦称插装阀、。由于它具有结构紧凑、制造方便、功率损失小、通油能力大、密封性好、易于集成等一系列优点,故得到普遍重视,发展很快,应用很广泛。在锻压机械、铸造机械、冶金机械、轻工机械的液压系统已有不少应用实例。能否用于桩工机械呢?我们通过分析、研究,首次将它用于YZY-120型全液压静力压桩机上。从1988年3月起先后在武汉市等地工地的桩基施工中,压人工程桩数百根,使用性能良好。我院近十多年来完成了几十项桩基础压桩工程,经过长期的使用和探索,我们认为桩机 Logic valves are also known as cartridge valves. Because it has a series of advantages such as compact structure, convenient manufacture, low power loss, large oil capacity, good sealing, and easy integration, it has received universal attention, has developed rapidly and is widely used. In the forging machinery, casting machinery, metallurgical machinery, light industrial machinery hydraulic system has many applications. Can it be used for piling machinery? We have used it for the first time on the YZY-120 hydraulic static pile driver through analysis and research. From March 1988 onwards in the construction of pile foundations in Wuhan and other places, hundreds of pressure piles were used, and the performance was good. In the past ten years, our hospital has completed dozens of pile foundation piles. After a long period of use and exploration, we believe that pile drivers