The invention relates to a novel triple seal anti-scour globe valve, which is widely used in the valves of utility boilers and steam turbine systems. A new type of triple seal anti-scour globe valve includes valve body, gasket, valve seat, auxiliary valve disc, auxiliary valve pressure cover, main valve disc, main valve pressure cover, spring, throttle sleeve, valve stem, valve cover stem, throttle window. The valve seat and the valve body are sealed by compression gasket. The stem drives the disc to move up and down along the throttle sleeve through the main valve pressure cover. The main disc and the auxiliary disc are connected by the auxiliary valve pressure cover, and the spring is arranged. When the valve is opened, the main valve disc, auxiliary valve disc and throttling window are opened in turn, and the process is closed when the valve is closed. The invention is a new type of structure, which realizes three seals, one ring seal and two conical seals (or plane seals) under the closed state of the valve. It not only prevents the damage of the sealing surface caused by impurities, but also reduces the erosion of the main sealing surface and the auxiliary sealing surface by the medium, thus improving the service life of the valve and achieving good sealing effect.
【技术实现步骤摘要】
新型三重密封抗冲刷截止阀
本专利技术涉及一种新型三重密封抗冲刷截止阀,属于电站阀门领域。
技术介绍
抗冲刷截止阀广泛应用于发电厂的锅炉、汽轮机系统中,在该系统中阀门的工作环境较差,特别是高温高压介质的工况,由于阀门动作频繁、介质流速较快,截止阀在介质通过时对密封面的冲蚀、损坏严重,导致阀门出现内漏,从而需要多次维修,影响阀门的使用寿命。
技术实现思路
本专利技术的目的是提供一种新型三重密封抗冲刷截止阀,阀门的性能更适用于电站领域高温高压工况。在阀门关闭过程中,首先,阀瓣先关闭节流套窗口,通过阀瓣与节流套间隙进行节流减压,并阻挡杂质,实现第一道辅助密封;其次,辅阀瓣继续下移关闭阀座辅封面,实现第二道密封;然后,主阀瓣再继续下移,关闭阀座主密封面,实现第三道密封,从而实现一道辅助密封和两道主密封,保证了阀门的密封性能,减小了介质对密封面的直接冲刷,增强了阀瓣、阀座密封面的耐冲刷能力,提高了阀门的密封能力,延长了阀门使用寿命。所述新型三重密封抗冲刷截止阀,其特征在于:它包括阀体、衬垫、阀座、辅阀瓣、辅阀压盖、主阀瓣、主阀压盖、弹簧、节流套、阀盖阀盖阀杆、节流窗口。通过连接螺栓,阀盖压紧节流套,再压紧阀座和衬垫,使阀座与阀体间密封。阀杆通过主阀压盖带动阀瓣沿节流套上下移动,使阀门开启、关闭。主阀瓣与辅阀瓣之间通过辅阀压盖连接,并设置弹簧。阀门开启时,主阀瓣先开启,当其行程超过辅行程H1后,辅阀压盖再带动辅阀瓣开启,主阀瓣开启高度达到密封行程H2时,节流套的节流窗口才开启。主阀瓣开启行程小于H2时,介质通过节流套与阀瓣之间的间隙进行节流减压,并阻挡介质中的颗粒。所述新型 ...
【技术保护点】
1.新型三重密封抗冲刷截止阀,其特征在于:它包括阀体、衬垫、阀座、辅阀瓣、辅阀压盖、主阀瓣、主阀压盖、弹簧、节流套、阀盖阀杆、节流窗口;阀座由阀盖通过节流套压紧在阀体上,阀座与阀体间设置衬垫密封,阀杆通过主阀压盖带动阀瓣沿节流套上下移动,主阀瓣与辅阀瓣之间通过辅阀压盖连接,并设置弹簧。
【技术特征摘要】
1.新型三重密封抗冲刷截止阀,其特征在于:它包括阀体、衬垫、阀座、辅阀瓣、辅阀压盖、主阀瓣、主阀压盖、弹簧、节流套、阀盖阀杆、节流窗口;阀座由阀盖通过节流套压紧在阀体上,阀座与阀体间设置衬垫密封,阀杆通过主阀压盖带动阀瓣沿节流套上下移动,主阀瓣与辅阀瓣之间通过辅阀压盖连接,并设置弹簧。2.根据权利要求1所述的新型三重密封抗冲刷截止阀,其特征在于:阀座设置主密封面、辅密封面两个密封面,阀门关闭时,分别与阀瓣和辅阀瓣贴合,形成双重密封。3.根据权利要求1所述的新型三重密封抗冲刷截止阀,其特征在于:辅阀瓣...
【专利技术属性】
技术研发人员:万胜军,孙建建,付青林,胡松柏,仲崇峰,张良默,张心宇,王永强,代云鹏,李红梅,王娟,
申请(专利权)人:哈电集团哈尔滨电站阀门有限公司,
类型:发明
国别省市:黑龙江,23
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