伯納德自控電動(dòng)球閥是伯納德自控技術(shù)公司參照*技術(shù),根據(jù)本公司實(shí)際情況設(shè)計(jì)制造的系列產(chǎn)品之一,它接受統(tǒng)一的標(biāo)準(zhǔn)電流信號(hào):4~20mA(III型)或0~10mA(II型),并根據(jù)信號(hào)的大小實(shí)現(xiàn)自動(dòng)控制球閥的開(kāi)度,V型球閥在球面上有一個(gè)V型切口,在開(kāi)口度范圍內(nèi)V型切口貼著閥座轉(zhuǎn)動(dòng),可增大調(diào)節(jié)比。同時(shí)在截流時(shí)對(duì)閥座還有剪切作用。因此該產(chǎn)品特別適用于可調(diào)比較大的控制系統(tǒng),從而達(dá)到對(duì)溫度、壓力、液面、流量等工藝參數(shù)的調(diào)節(jié),尤其適用于含纖維、細(xì)顆粒、料漿類等流體的控制,該產(chǎn)品可廣泛用于發(fā)電,冶金,礦山,石油,化工,輕工等行業(yè)。特點(diǎn)是閥體流路簡(jiǎn)單,阻力小,流通能力比單雙座調(diào)節(jié)閥同口徑大三分之一左右,同時(shí)該產(chǎn)品由于球體在閥體內(nèi)采用旋轉(zhuǎn)動(dòng)作,不但提高了填料的密封性,提高了允許差壓值,而且縮小了體積,減輕了整體重量。
伯納德自控電動(dòng)球閥配套QT數(shù)字一體化控制器分為開(kāi)關(guān)型和調(diào)節(jié)型兩種。開(kāi)關(guān)型只接收外部提供的開(kāi)關(guān)量信號(hào),由MCU進(jìn)行處理,輸出指令轉(zhuǎn)換后直接驅(qū)動(dòng)電機(jī)動(dòng)作,完成執(zhí)行機(jī)構(gòu)開(kāi)、關(guān)動(dòng)作,提供比例信號(hào)反饋,并提供一個(gè)遠(yuǎn)方閉合觸點(diǎn)。調(diào)節(jié)型接收外部提供的比例信號(hào),由MCU進(jìn)行處理,輸出指令轉(zhuǎn)換后直接驅(qū)動(dòng)電機(jī)動(dòng)作,完成執(zhí)行機(jī)構(gòu)開(kāi)、關(guān)動(dòng)作,提供比例信號(hào)反饋,并提供一個(gè)遠(yuǎn)方閉合觸點(diǎn)。
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