The utility model relates to an internal screw type high temperature corrugated pipe gate valve with hydraulic transmission, relating to a hydraulic transmission gate valve. Including internal screw type valve, hydraulic head device is connected with the hydraulic transmission device frame head machine, frame and hydraulic valve head cover device connected by bolts, gaskets, spring nut mechanical, hydraulic head and the stem above the core shaft and hydraulic head of the core shaft connected by bolt mechanical valve, Co based alloy hardfacing the sealing ring, titanizing austenitic stainless steel corrugated pipe device is movably connected between the gate and the lower part of the machine head and the upper stem, stem gate under active mechanical connection, the lifting rod of the valve rod to drive the titanizing austenitic stainless steel corrugated pipe lifting device, simple structure, convenient installation, hydraulic head can be used in pipeline automation control, connecting thread convenient disassembly, double rugged bellows easy disassembly.
【技术实现步骤摘要】
本专利技术是涉及一种液压传动的闸阀。 背景4支术目前,公知的闸阀,具有闸阀的启闭件是塞型的闸板,密封 面呈平面或锥面,闸板沿流体的中心线作直线运动。阀杆的运 动型式,有升降杆式。闸阀只适用于全开和全关,不允许作调 节和节流。属于强制密封式阀门,所以在阀门关闭时,必须向 闸板施加压力,以强制密封面不泄漏。当介质由闸板下方进入 阀门时,操作力所需克服的阻力,是阀杆和填料的摩擦力与由 介质的压力所产生的推力,关阀门的力比开阀门的力大,所以 阀杆的直径要大,否则会发生阀杆顶弯的故障。近年来,从自 密封的阀门出现以后,闸阀的介质流向就改由闸板上方进入阀 腔,这时,在介质压力作用下,关阀门的力小,而开阀门的力 大,阀杆的直径可以相应地减小。同时,在介质作用下,这种 型式的阀门也较严密。闸阀开启时,闸板的开启高度,为公称 直径的25% ~30%时,流量已达到最大,表示阀门已达全开位 置。所以闸阀的全开位置,应由闸板的行程来决定。
技术实现思路
为了解决闸阀强制密封式阀门,在阀门关闭时,必须向闸板施 加压力,以强制密封面不泄漏的技术问题,本专利技术提供一种液 压传动的内螺紋式 ...
【技术保护点】
一种液压传动的内螺纹式耐高温波纹管闸阀,包括内螺纹式阀体、其特征在于液压传动头装置与液压传动头装置架机械连接,液压传动头装置架与阀盖由螺栓、弹簧垫片、螺母机械连接。
【技术特征摘要】
【专利技术属性】
技术研发人员:季祝华,
申请(专利权)人:上海海星阀门总厂,
类型:发明
国别省市:31[中国|上海]
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