功能介绍 Function introduction

进口防爆电动蝶阀(Exd ⅡBT4，CT5，CT6）装配上防爆电动执行器组合而成，防护等级一般在IP65.67.68，是一种专门应用于易燃易爆气体、液体或粉尘等介质的防爆阀门，设备均经过防静电处理，根据介质温度高低的不同，选用不同的密形式，分为金属密封和软密封结构，也可根据工况的需要选择开关型或调节型防爆电动蝶阀（输入4～20mA电流信号控制来调节流量的大小），在现代工业自动化控制领域中起到不可缺少的作用 retz Imported explosion-proof electric butterfly valves (Exd Ⅱ BT4, CT5, CT6) are assembled with explosion-proof electric actuators. The protection grade is generally IP65.67.68. It is an explosion-proof valve specially applied to flammable and explosive gas, liquid or dust and other media. The equipment is subject to anti-static treatment. According to the different temperature of the media, different sealing forms are selected, which are divided into metal sealing and soft sealing structures, Switch type or regulating type explosion-proof electric butterfly valve can also be selected according to the needs of working conditions (input 4~20mA current signal control to adjust the flow), which plays an indispensable role in the field of modern industrial automation control.

设计特色 Design features

1、防爆电动蝶阀的结构原理是把设备可能点燃爆炸性介质的部件全部封闭在一个外壳内，其外壳能够承受通过外壳任何接合面或结构间隙，渗透到外壳内部的可燃性介质在内部爆炸而不损坏 The structural principle of explosion-proof electric butterfly valve is to enclose all parts of the equipment that may ignite the explosive medium in a shell. The shell can withstand the internal explosion of the combustible medium penetrating into the shell through any joint surface or structural gap of the shell without damage

2、隔爆外壳使设备内部空间与周围的环境隔开。当其发生爆炸时，外壳可以承受产生的爆炸压力而不损坏，同时外壳结构间隙可冷却火焰、降低火焰传播速度或终止加速链，使火焰或危险的火焰生成物不能穿越隔爆间隙点燃外部爆炸性环境，从而达到隔爆目的 The flameproof enclosure separates the internal space of the equipment from the surrounding environment. When it explodes, the shell can withstand the explosion pressure without damage. At the same time, the shell structure gap can cool the flame, reduce the flame propagation speed or terminate the acceleration chain, so that the flame or dangerous flame products cannot pass through the flameproof gap to ignite the external explosive environment, thus achieving the flameproof purpose

3、三偏心结构：阀杆轴线与蝶板密封面间偏置一个尺寸，并与阀体通道轴线偏置一个尺寸，阀座回转轴线与阀体通道轴线形成一个偏心角，故形成三偏心。蝶阀从0°～90°开启时，蝶板密封面会在开启的瞬间立即脱离阀座密封面，在其90°～0°关闭时，只有在关闭的瞬间，其蝶板圆锥形密封面才会接触并压紧阀座圆锥形密封。所以阀座与蝶板上的密封面之间无任何摩擦，去除了磨损和泄漏的可能性 Three-eccentric structure: the valve rod axis is offset by one dimension from the sealing surface of the butterfly plate, and offset by one dimension from the valve body channel axis. The valve seat rotation axis forms an eccentric angle with the valve body channel axis, thus forming a three-eccentric structure. When the butterfly valve is opened from 0 ° to 90 °, the sealing surface of the butterfly plate will immediately disengage from the sealing surface of the valve seat at the moment of opening. When the butterfly valve is closed at 90 ° to 0 °, the conical sealing surface of the butterfly plate will contact and press the conical sealing surface of the valve seat only at the moment of closing. Therefore, there is no friction between the valve seat and the sealing surface on the butterfly plate, which eliminates the possibility of wear and leakage

4、中线结构：蝶板的回转中心(即阀杆的中心)位于阀体的中心线和蝶板的密封面截面上。阀座采用合成橡胶。关闭时蝶板的外圆密封面挤压合成橡胶阀座，使阀座产生弹性变形而形成弹性力作为密封比压保证蝶阀的密封 Centerline structure: the rotating center of the butterfly plate (i.e. the center of the valve rod) is located on the center line of the valve body and the section of the sealing surface of the butterfly plate. The valve seat is made of synthetic rubber. When closing, the outer circle sealing surface of the butterfly plate squeezes the synthetic rubber valve seat, making the valve seat elastic deformation and forming elastic force as the sealing pressure to ensure the sealing of the butterfly valve

基本参数 Basic parameters

主要零件材料 Material of main parts

主要技术参数及性能 Main technical parameters and performance

执行器技术参数 Technical parameters of actuator