A self pressure regulating valve, control valve and actuator is composed of two parts, the control valve comprises a valve body, a valve seat, a guide sleeve, valve parts and valve cover; the actuator includes upper and lower membrane chamber, diaphragm, spring, the top plate and the push rod, the utility model is characterized in that the valve core component is composed of a valve core, corrugated pipe, valve stem, valve spring, a guide sleeve is arranged between the valve body and the valve cover, the valve core is provided with a balanced spool components before and after the circulation medium pressure valve hole is arranged outside the corrugated pipe and the valve springs, valve stem in the valve spool spring inside; so the valve core is always in the left seat, keep stem always in contact with the actuator rod; the upper and lower membrane between the diaphragm chamber, push rod and the top plate installed on the diaphragm, and the extending end of the valve rod of the control valve tappet contact; the upper and lower membrane chamber. A bore that controls the pressure of the signal.
【技术实现步骤摘要】
【国外来华专利技术】
本技术属于石油.化工.冶金.轻工等工业部门及城市供暖、供气、供水系统应用的一种无需外来能源，依靠被控介质自身的压力变化进行自动调节压力的自力式压力调节阀。自力式压力调节阀是利用被调介质自身压力的变化，直接驱动调节机构进行压力调节现有技术是由浮动阀，指挥器和针阀三部分组成。附附图说明图1为作阀后压力调节的调节阀结构原理图。浮动阀(2)安装在介质输入管路上，被调介质从箭头方向输入。指挥器(1)和针阀(3)按图1所示方式用管路连接。当调节阀的阀后压力升高时，引起浮动阀下膜室压力升高。升高的阀后压力传到指挥器的下膜室，使指挥器喷嘴挡板距离减小，输出至浮动阀上膜室的操作信号压力减小，浮动阀在变化的压力和弹簧反力的作用下关小，使阀后压力降低到预先的设定值。反之，当调节阀的阀后压力降低到设定值以下时，浮动阀下膜室的压力下降，指挥器输出压力增加，使浮动阀开度增加，阀后压力升高至设定值，保证了调节阀阀后压力的恒定。由于调节阀是由三部分组成，需到现场安装调试，占用的空间较大，其调试的精度也不易保证。本技术是针对现有技术的不足而设计的，具有测量、执行和控制综合功能的，无需外来能源...
【技术保护点】
【技术特征摘要】
【国外来华专利技术】
【专利技术属性】
技术研发人员：张德庆，刘国强，罗桂明，孙静，沈惠平，罗兴好，
申请(专利权)人：鞍山自控仪表集团股份有限公司，
类型：实用新型
国别省市：
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