一、什么是電動球閥和氣動球閥

1、電動球閥，英(ying)文(wen)名(ming)稱(cheng)：motor-driven ball valve 或者 electric ball valve。電(dian)動(dong)(dong)球(qiu)閥(fa)通(tong)常由(you)電(dian)動(dong)(dong)執(zhi)行(xing)機(ji)構和球(qiu)閥(fa)連接(jie)起來，經過安(an)裝(zhuang)調試后(hou)成為(wei)(wei)電(dian)動(dong)(dong)球(qiu)閥(fa)。電(dian)動(dong)(dong)球(qiu)閥(fa)使用(yong)電(dian)能作(zuo)為(wei)(wei)動(dong)(dong)力(li)來接(jie)通(tong)電(dian)動(dong)(dong)執(zhi)行(xing)機(ji)構驅動(dong)(dong)球(qiu)閥(fa)，實現球(qiu)閥(fa)的開關、調節(jie)動(dong)(dong)作(zuo)，從而達到(dao)對管道介質的開關或是調節(jie)目的。

2、氣動球閥是球(qiu)閥(fa)(fa)(fa)配上氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)執行器。由氣(qi)(qi)(qi)(qi)(qi)源(yuan)為動(dong)(dong)(dong)(dong)(dong)(dong)力(li)來(lai)驅(qu)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)開啟和(he)關(guan)(guan)閉，從(cong)而(er)實(shi)現對(dui)介質(zhi)(zhi)的(de)開關(guan)(guan)、調節(jie)動(dong)(dong)(dong)(dong)(dong)(dong)作，從(cong)而(er)達到對(dui)管(guan)道介質(zhi)(zhi)的(de)開關(guan)(guan)或是調節(jie)目的(de)自動(dong)(dong)(dong)(dong)(dong)(dong)化裝置。氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)通常配置各種附件，比如電(dian)磁閥(fa)(fa)(fa)、氣(qi)(qi)(qi)(qi)(qi)源(yuan)處理(li)三聯件、限位開關(guan)(guan)、定(ding)位器、控(kong)制(zhi)(zhi)箱等，以(yi)實(shi)現就地控(kong)制(zhi)(zhi)和(he)遠距離(li)集(ji)中控(kong)制(zhi)(zhi)，在控(kong)制(zhi)(zhi)室里就可以(yi)控(kong)制(zhi)(zhi)閥(fa)(fa)(fa)門(men)的(de)開關(guan)(guan)，不需要跑到現場(chang)或者高空和(he)危(wei)險(xian)地帶來(lai)手動(dong)(dong)(dong)(dong)(dong)(dong)控(kong)制(zhi)(zhi)，在很大程(cheng)度上節(jie)約了人(ren)力(li)資源(yuan)以(yi)及時間和(he)安(an)全性。氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)具體(ti)分類有：不銹(xiu)鋼(gang)氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)，塑料(liao)氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)，衛生(sheng)級氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)，碳鋼(gang)氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)，二通氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)，三通氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)，四通氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)。

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二、氣動球閥和電動球閥的區別

1、氣(qi)(qi)動(dong)(dong)(dong)閥(fa)動(dong)(dong)(dong)作力距比電(dian)動(dong)(dong)(dong)球閥(fa)大(da)，氣(qi)(qi)動(dong)(dong)(dong)閥(fa)門(men)(men)開(kai)關動(dong)(dong)(dong)作速度可以(yi)調整(zheng)，結(jie)構簡單(dan)，易(yi)維護，動(dong)(dong)(dong)作過程中因氣(qi)(qi)體(ti)本身的緩沖特性，不易(yi)因卡住(zhu)而損壞，但必須有氣(qi)(qi)源，且其控(kong)(kong)(kong)制系統也(ye)比電(dian)動(dong)(dong)(dong)閥(fa)門(men)(men)復雜。氣(qi)(qi)動(dong)(dong)(dong)閥(fa)門(men)(men)響應靈(ling)敏，安全(quan)可靠，很多對控(kong)(kong)(kong)制要求高的廠專為(wei)氣(qi)(qi)動(dong)(dong)(dong)儀表控(kong)(kong)(kong)制元件設(she)置壓縮(suo)空氣(qi)(qi)站。氣(qi)(qi)動(dong)(dong)(dong)閥(fa)門(men)(men)執行(xing)機(ji)構動(dong)(dong)(dong)力源為(wei)氣(qi)(qi)源，氣(qi)(qi)源來源于空壓機(ji)，采用定位(wei)器將電(dian)控(kong)(kong)(kong)信(xin)號(hao)轉換成氣(qi)(qi)動(dong)(dong)(dong)控(kong)(kong)(kong)制信(xin)號(hao)，驅動(dong)(dong)(dong)氣(qi)(qi)動(dong)(dong)(dong)執行(xing)機(ji)構進行(xing)閥(fa)位(wei)調節(jie)。

2、電動閥門執行機構(gou)動(dong)(dong)力源(yuan)為電(dian)源(yuan)，如果線(xian)路板或電(dian)機出(chu)現(xian)故障容(rong)易出(chu)現(xian)火花，所以一般(ban)應用在環境要求不高和沒有危險的場合。就氣動(dong)(dong)執行機構(gou)和電(dian)動(dong)(dong)執行機構(gou)調(diao)(diao)節(jie)性(xing)能比較(jiao)，氣動(dong)(dong)執行機構(gou)響應速(su)度更(geng)快，能更(geng)適合應用在調(diao)(diao)節(jie)工況，所以生產(chan)調(diao)(diao)節(jie)閥(fa)的廠家(jia)都同時(shi)生產(chan)氣動(dong)(dong)執行機構(gou)與之配(pei)套。

3、氣(qi)動(dong)(dong)球閥(fa)比電動(dong)(dong)球閥(fa)響應速度(du)快，一般(ban)氣(qi)動(dong)(dong)球閥(fa)的(de)開關時(shi)間為6秒左右，而電動(dong)(dong)球閥(fa)的(de)開關時(shi)間一般(ban)為15-20秒。

4、電(dian)動(dong)閥(fa)門和(he)氣動(dong)閥(fa)門的本質區別在(zai)于使用(yong)不同(tong)的驅動(dong)裝(zhuang)置，也就是(shi)執行(xing)機(ji)構，配合不同(tong)的執行(xing)機(ji)構主要(yao)是(shi)工(gong)況(kuang)要(yao)求，如化工(gong)等要(yao)求防爆的場(chang)合，使用(yong)最(zui)多(duo)的是(shi)氣動(dong)閥(fa)門，因(yin)為(wei)安全性要(yao)求高(gao)，而(er)且價格便宜，配合智(zhi)能定位器可以上(shang)總線，控制方式(shi)也簡(jian)單。

5、電動球閥優點：對液體介質和(he)大(da)管徑氣體效(xiao)果好(hao)，不受(shou)氣候影響(xiang)。不受(shou)空壓氣的壓力影響(xiang)。缺(que)點：成本高、在潮濕環境(jing)不好(hao)。

6、氣動球閥優點：對(dui)氣(qi)體(ti)介質和小管徑液體(ti)效果好，成本低，維護(hu)方便。缺點：受空壓(ya)氣(qi)壓(ya)力波(bo)動的影(ying)(ying)響(xiang)，在北方冬季(ji)易受空壓(ya)氣(qi)含水影(ying)(ying)響(xiang)，造成傳動部分凍結、不動作。

三、如何選用氣動球閥和電動球閥

電動球閥主要適宜用在沒有儀表氣源的場所，安裝使用方便，但安全性能較差，不宜使用在易燃易爆等對防爆性要求比較高的危險場所，使用中不及氣動閥穩定，維修量相對較大；氣動球閥響應速度快，其(qi)安(an)(an)全性能比較高，廣泛(fan)用(yong)(yong)(yong)在(zai)易燃易爆等(deng)防爆要求高的場所。但(dan)安(an)(an)裝使用(yong)(yong)(yong)需要儀(yi)表(biao)氣(qi)(qi)源，多只使用(yong)(yong)(yong)比較合算，可以建(jian)立氣(qi)(qi)源基地。