A steam turbine exhaust valve closing valve structure, including valve body, valve plate, push rod and driving device, the valve plate is located inside the valve body, the valve plate is fixed connecting the push rod, the push rod is extended out of the valve body and the driving device fixed connection, the angle between the valve plate and the bottom of the valve body is 26 degrees, the angle between the push rod and the bottom of the valve body is 6. 0 degrees, the axis of the driving device and the axis of the push rod are in a straight line. The beneficial effects of the utility model are as follows: 1. The counterforce is formed by the valve plate on the push rod by the inclined installation. The direction of the counterforce is to follow the direction of the push rod, to ensure the stability of the push rod and to improve the service life of the push rod; 2, the spring of the driving device is pushed through the way of the inclined installation, and the spring of the driving device is pushed through the push. The supporting force exerted by the rod on the valve plate is almost perpendicular to the valve plate, and the spring force is fully applied to realize the requirement of small torque. 3, when the medium is reversed, the valve plate depends on its own gravity and the closing device to realize fast closure and prevent the reverse flow of the medium.
【技术实现步骤摘要】
一种汽轮机抽汽逆止速关阀的助关结构
本技术涉及一种速关阀,特别是涉及一种速关阀的助关结构。
技术介绍
汽轮机抽汽逆止速关阀是为了给汽轮机抽汽起到最大保护而设计的。它们通过快速和严密的关闭保证当发电机跳闸、主汽门关闭时加热器或热力管道中的高能量的水或蒸汽能够被迅速地与汽轮机隔离,从而起到保护汽轮机的作用。与常规阀门相比,汽轮机抽汽逆止速关阀作为一个保护装置,其重要的设计原则是必须有很高的可靠性。
技术实现思路
为了克服现有抽汽逆止速关阀上述缺点,本技术提供一种操作力矩小、使用寿命长、关闭时间短的逆止速关阀助关结构。本技术解决其技术问题所采用的技术方案是一种汽轮机抽汽逆止速关阀的助关结构,包括阀体、阀板、推杆以及驱动装置,阀板位于阀体内部,阀板上固定连接推杆,推杆延伸出阀体与驱动装置固定连接,阀板与与阀体底面之间的夹角为α,0°<α<30°,推杆与阀体底面之间的夹角为β,45°<β<90°,驱动装置的轴线与推杆的轴线在一直线上。优选方案为,α为26°,β为60°。本技术的有益效果是:1、采用倾斜安装的方式,阀板对推杆形成反作用力,反作用力的作用方向是沿着推杆方向,确保推杆的稳定性,提高推杆的使用寿命;2、采用倾斜安装的方式,在助关行程中,驱动装置的弹簧通过推杆对阀板施加的助关力几乎垂直于阀板,充分运用弹簧力,实现了力矩小的要求;3、当介质倒流时,阀板依靠自身的重力作用及通过推杆传力的弹簧力和反向汽流压力作用下,实现快速关闭,防止介质倒流。附图说明下面结合附图和实施例对本专利技术作进一步说明。图1是本实施例结构 ...
【技术保护点】
1.一种汽轮机抽汽逆止速关阀的助关结构,包括阀体、阀板、推杆以及驱动装置,阀板位于阀体内部,阀板上固定连接推杆,所述推杆延伸出阀体与所述驱动装置固定连接,其特征在于:所述阀板与与阀体底面之间的夹角为α,0°
【技术特征摘要】
1.一种汽轮机抽汽逆止速关阀的助关结构,包括阀体、阀板、推杆以及驱动装置,阀板位于阀体内部,阀板上固定连接推杆,所述推杆延伸出阀体与所述驱动装置固定连接,其特征在于:所述阀板与与阀体底面之间的夹角为α,0°<α&...
【专利技术属性】
技术研发人员:徐艳华,施水杰,熊冬庆,林凯宇,刘辉,
申请(专利权)人:江苏神通阀门股份有限公司,
类型:新型
国别省市:江苏,32
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