The hydraulic valve is mainly applied to hydropower medium containing sediment water temperature -28~80 hydropower station water pipe as the opening and closing device can only be fully open and fully closed, can not be adjusted, with the advantages of small flow resistance, and closed flexible, high safety and convenient operation, etc..
Note: parameters are for reference only, or are not full. Valve can be used in accordance with the requirements of different pressure, material, diameter, drive, etc.. Specific please contact or online advisory contact.
采用双密封环的活塞止水环结构,分上游检修密封和下游工作密封。在环形阀芯的上下游密封位置均设置有密封环,通过液压系统推动活塞止环与其压紧,实现密封。正常关闭球阀时,下游工作密封关闭,顺利止水,而在检修或更换下游工作密封时,上游检修密封关闭,并由机械锁定装置锁定。
操作机构为液压操作机构(直缸接力器),直缸接力器为活塞--拨叉机构,设置有手动锁定装置、主阀位置信号指示装置以及手动锁锭投入或拨出信号指示装置。手动锁定装置能抵挡接力器的操作压力,避免阀门误动作。
在球阀的上、下游密封环上,分别设置了位置行程开关,通过电路接至中控室后,能够准确地了解密封环所处状态,以便能够准确地操作接力器开关阀门。
液动球阀(主阀)上游通过阀前短管与进水管道焊接,下游通过伸缩节与水轮机蜗壳连接,以便于安装和检修液动球阀(主阀),伸缩节调整。
液动球阀(主阀)设置有旁通生产管道,其目的在于开启主阀前使阀门上下游端的压力平衡,减小主阀启闭力矩。旁通阀为--液动球阀,在液动球阀前设置-手动阀门,用于检修旁通液动球阀。
在伸缩节顶部设置有DN80的楔式闸阀,在压力钢管向下游水轮机充水时,该阀门完全打开,将水面的空气排除。在球阀底部和伸缩节度部均设置有DN80mm,PN4.0MPa的手动闸阀,用于在检修水轮机等时充分排除阀门体腔内的污物和蜗壳内和积水。
在接力器的开关两个进油口处分别设置了两具节流阀,使阀门的开启和关闭时间可以根据顾客要求进行调节。
1, technical manufacture according to the provisions of GB12237
2, inspection and testing according to the provisions of JB/T9092
3, the flange size according to the provisions of JB79
4, the structure length according to the provisions of GB12221