The utility model relates to a welded connecting high temperature resistant corrugated pipe gate valve, relating to a gate valve. Including welding connection type valve, the valve body welding connection type Co hard alloy welded seal, titanizing austenitic stainless steel dual corrugated pipe device is adjustably connected with the valve rod below the lifting rod of the valve rod and a handwheel is rotated to drive the titanizing austenitic stainless steel corrugated pipe device with double lifting stem nut, double rugged bellows is convenient to disassemble, products reasonable structure, reliable sealing, to ensure zero leakage of the valve stem. No fluid loss, lower energy losses, and improve plant equipment safety. Surfacing Co hard alloy sealing bellows titanizing austenitic stainless steel corrosion resistance, abrasion resistance, anti friction performance, long service life, the pipeline is suitable for various operating conditions of petroleum, chemical, pharmaceutical, chemical, electric power industry and so on, cut off or connected piping media. It is used especially in the heat conduction oil pipe furnace project.
【技术实现步骤摘要】
本专利技术是涉及一种闸阀。
技术介绍
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lj)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^^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ii7v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焊接连 接式耐高温波紋管闸 ...
【技术保护点】
一种焊接连接式耐高温波纹管闸阀,包括焊接连接式阀体、其特征在于焊接连接式阀体上堆焊Co基硬质合金密封圈,镀钛奥氏体不锈钢双重波纹管装置活络机械连接在阀杆的下方。
【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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