RETZ工業(yè)/美國(guó)瑞茨，我們一直致力于流體控制領(lǐng)域的持續(xù)創(chuàng)新，始于2005……電動(dòng)防爆蝶閥屬旋轉(zhuǎn)類型閥門，由防爆角行程電動(dòng)執(zhí)行器和蝶閥配套，接受工業(yè)自動(dòng)化控制(DCS, PLC系統(tǒng))儀表來源的電流信號(hào)或電壓信號(hào)的輸入輸出，可實(shí)現(xiàn)對(duì)工藝管路中流體介質(zhì)的比例調(diào)節(jié)或二位開關(guān)控制.retz The electric explosion-proof butterfly valve belongs to the rotary type valve, which is equipped with an explosion-proof angle stroke electric actuator and butterfly valve. It receives input and output of current or voltage signals from industrial automation control (DCS, PLC system) instruments, and can achieve proportional adjustment or two-position switch control of the fluid medium in the process pipeline
進(jìn)口防爆電動(dòng)蝶閥功能介紹 Function introduction
1. 防爆等級(jí)(Exd ⅡBT4，CT5，CT6），把設(shè)備可能點(diǎn)燃爆炸性介質(zhì)的部件全部封閉在一個(gè)外殼內(nèi)，其外殼能夠承受通過外殼任何接合面或結(jié)構(gòu)間隙，滲透到外殼內(nèi)部的可燃性介質(zhì)在內(nèi)部爆炸而不損壞
2. 隔爆外殼使設(shè)備內(nèi)部空間與周圍的環(huán)境隔開。當(dāng)其發(fā)生爆炸時(shí)，外殼可以承受產(chǎn)生的爆炸壓力而不損壞，同時(shí)外殼結(jié)構(gòu)間隙可冷卻火焰、降低火焰?zhèn)鞑ニ俣然蚪K止加速鏈，使火焰或危險(xiǎn)的火焰生成物不能穿越隔爆間隙點(diǎn)燃外部爆炸性環(huán)境，從而達(dá)到隔爆目的
3.防護(hù)等級(jí)一般在IP65.67.68，是一種專門應(yīng)用于易燃易爆氣體、液體或粉塵等介質(zhì)的防爆閥門，設(shè)備均經(jīng)過防靜電處理，根據(jù)介質(zhì)溫度高低的不同，選用不同的密形式，分為金屬密封和軟密封結(jié)構(gòu)，也可根據(jù)工況的需要選擇開關(guān)型或調(diào)節(jié)型防爆電動(dòng)蝶閥（輸入4～20mA電流信號(hào)控制來調(diào)節(jié)流量的大?。诂F(xiàn)代工業(yè)自動(dòng)化控制領(lǐng)域中起到bu可qie少的作用
進(jìn)口防爆電動(dòng)蝶閥設(shè)計(jì)特色 Design features
1、三偏心結(jié)構(gòu)：閥桿軸線與蝶板密封面間偏置一個(gè)尺寸，并與閥體通道軸線偏置一個(gè)尺寸，閥座回轉(zhuǎn)軸線與閥體通道軸線形成一個(gè)偏心角，故形成三偏心。蝶閥從0°～90°開啟時(shí)，蝶板密封面會(huì)在開啟的瞬間立即脫離閥座密封面，在其90°～0°關(guān)閉時(shí)，只有在關(guān)閉的瞬間，其蝶板圓錐形密封面才會(huì)接觸并壓緊閥座圓錐形密封。所以閥座與蝶板上的密封面之間無任何摩擦，去除了磨損和泄漏的可能性 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
2、中線結(jié)構(gòu)：蝶板的回轉(zhuǎn)中心(即閥桿的中心)位于閥體的中心線和蝶板的密封面截面上。閥座采用合成橡膠。關(guān)閉時(shí)蝶板的外圓密封面擠壓合成橡膠閥座，使閥座產(chǎn)生彈性變形而形成彈性力作為密封比壓保證蝶閥的密封
