一、什么是電動球閥和氣動球閥

1、電動球閥，英文名稱：motor-driven ball valve 或者(zhe) electric ball valve。電(dian)(dian)動球閥(fa)(fa)(fa)通常由(you)電(dian)(dian)動執行機(ji)構(gou)和球閥(fa)(fa)(fa)連(lian)接起來，經(jing)過安裝調(diao)(diao)試后成(cheng)為電(dian)(dian)動球閥(fa)(fa)(fa)。電(dian)(dian)動球閥(fa)(fa)(fa)使用電(dian)(dian)能作(zuo)為動力來接通電(dian)(dian)動執行機(ji)構(gou)驅(qu)動球閥(fa)(fa)(fa)，實現球閥(fa)(fa)(fa)的(de)開(kai)關(guan)、調(diao)(diao)節動作(zuo)，從而達到(dao)對管道介質的(de)開(kai)關(guan)或是調(diao)(diao)節目的(de)。

2、氣動球閥是球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)配上氣(qi)(qi)動(dong)(dong)(dong)(dong)執行(xing)器(qi)。由氣(qi)(qi)源(yuan)為動(dong)(dong)(dong)(dong)力來驅動(dong)(dong)(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)開(kai)啟和(he)關(guan)(guan)(guan)閉，從(cong)而實現(xian)對介質的開(kai)關(guan)(guan)(guan)、調節動(dong)(dong)(dong)(dong)作，從(cong)而達到對管道(dao)介質的開(kai)關(guan)(guan)(guan)或是調節目的自(zi)動(dong)(dong)(dong)(dong)化裝置。氣(qi)(qi)動(dong)(dong)(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)通(tong)常配置各種附(fu)件，比如電磁(ci)閥(fa)(fa)(fa)、氣(qi)(qi)源(yuan)處(chu)理三(san)聯件、限位開(kai)關(guan)(guan)(guan)、定位器(qi)、控(kong)(kong)制(zhi)(zhi)箱等，以(yi)(yi)實現(xian)就地控(kong)(kong)制(zhi)(zhi)和(he)遠距離(li)集中控(kong)(kong)制(zhi)(zhi)，在控(kong)(kong)制(zhi)(zhi)室里就可以(yi)(yi)控(kong)(kong)制(zhi)(zhi)閥(fa)(fa)(fa)門的開(kai)關(guan)(guan)(guan)，不(bu)(bu)需要跑到現(xian)場或者高(gao)空和(he)危險地帶來手動(dong)(dong)(dong)(dong)控(kong)(kong)制(zhi)(zhi)，在很大程度上節約了人力資源(yuan)以(yi)(yi)及時間和(he)安全性(xing)。氣(qi)(qi)動(dong)(dong)(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)具體分(fen)類有：不(bu)(bu)銹鋼氣(qi)(qi)動(dong)(dong)(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)，塑料氣(qi)(qi)動(dong)(dong)(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)，衛生級(ji)氣(qi)(qi)動(dong)(dong)(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)，碳鋼氣(qi)(qi)動(dong)(dong)(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)，二通(tong)氣(qi)(qi)動(dong)(dong)(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)，三(san)通(tong)氣(qi)(qi)動(dong)(dong)(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)，四通(tong)氣(qi)(qi)動(dong)(dong)(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)(fa)(fa)。

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二、氣動球閥和電動球閥的區別

1、氣動(dong)(dong)(dong)(dong)閥(fa)(fa)(fa)(fa)動(dong)(dong)(dong)(dong)作(zuo)力距比電動(dong)(dong)(dong)(dong)球(qiu)閥(fa)(fa)(fa)(fa)大，氣動(dong)(dong)(dong)(dong)閥(fa)(fa)(fa)(fa)門(men)開關動(dong)(dong)(dong)(dong)作(zuo)速(su)度可(ke)以調整(zheng)，結(jie)構(gou)簡(jian)單，易維護，動(dong)(dong)(dong)(dong)作(zuo)過程中因(yin)氣體本身的緩沖特性，不易因(yin)卡住而(er)損壞，但(dan)必須有氣源，且其控制(zhi)(zhi)系統也比電動(dong)(dong)(dong)(dong)閥(fa)(fa)(fa)(fa)門(men)復(fu)雜。氣動(dong)(dong)(dong)(dong)閥(fa)(fa)(fa)(fa)門(men)響應靈(ling)敏，安全可(ke)靠，很多對(dui)控制(zhi)(zhi)要求高(gao)的廠專為氣動(dong)(dong)(dong)(dong)儀表控制(zhi)(zhi)元件設(she)置(zhi)壓縮空氣站(zhan)。氣動(dong)(dong)(dong)(dong)閥(fa)(fa)(fa)(fa)門(men)執行(xing)機構(gou)動(dong)(dong)(dong)(dong)力源為氣源，氣源來(lai)源于空壓機，采用(yong)定位(wei)器將電控信(xin)號轉(zhuan)換成氣動(dong)(dong)(dong)(dong)控制(zhi)(zhi)信(xin)號，驅動(dong)(dong)(dong)(dong)氣動(dong)(dong)(dong)(dong)執行(xing)機構(gou)進行(xing)閥(fa)(fa)(fa)(fa)位(wei)調節。

2、電動閥門執(zhi)行(xing)(xing)機構動(dong)力源為電(dian)源，如果線路板或電(dian)機出(chu)現故障(zhang)容易出(chu)現火花，所以(yi)一般應用在(zai)環境要求不高和沒有(you)危險的場合。就氣(qi)動(dong)執(zhi)行(xing)(xing)機構和電(dian)動(dong)執(zhi)行(xing)(xing)機構調節性(xing)能比較，氣(qi)動(dong)執(zhi)行(xing)(xing)機構響應速度更快(kuai)，能更適合應用在(zai)調節工況，所以(yi)生(sheng)產調節閥(fa)的廠家都同時生(sheng)產氣(qi)動(dong)執(zhi)行(xing)(xing)機構與之配套(tao)。

3、氣(qi)動(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)比電動(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)響(xiang)應速度(du)快，一般(ban)氣(qi)動(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)的開關時間(jian)為6秒(miao)左右，而電動(dong)(dong)球(qiu)(qiu)(qiu)閥(fa)的開關時間(jian)一般(ban)為15-20秒(miao)。

4、電動(dong)閥(fa)門(men)和氣(qi)動(dong)閥(fa)門(men)的(de)本(ben)質區別在于使(shi)用不同的(de)驅動(dong)裝置，也就是(shi)執行(xing)機(ji)構，配(pei)合(he)不同的(de)執行(xing)機(ji)構主(zhu)要(yao)(yao)(yao)是(shi)工況(kuang)要(yao)(yao)(yao)求(qiu)，如(ru)化工等要(yao)(yao)(yao)求(qiu)防爆的(de)場合(he)，使(shi)用最(zui)多(duo)的(de)是(shi)氣(qi)動(dong)閥(fa)門(men)，因為安全(quan)性要(yao)(yao)(yao)求(qiu)高，而(er)且(qie)價格便宜，配(pei)合(he)智(zhi)能定位器可以上總線，控制(zhi)方式也簡(jian)單。

5、電動球閥(fa)優點：對液(ye)體介質和大管徑氣體效果好(hao)，不受(shou)氣候影(ying)響。不受(shou)空壓(ya)氣的壓(ya)力影(ying)響。缺(que)點：成本(ben)高、在潮濕環境不好(hao)。

6、氣動球閥優(you)點(dian)：對氣(qi)體介質和小管(guan)徑(jing)液體效果好，成本低，維護方便。缺點(dian)：受(shou)空壓氣(qi)壓力波動(dong)的(de)影響，在北方冬季(ji)易受(shou)空壓氣(qi)含水(shui)影響，造成傳(chuan)動(dong)部(bu)分凍結、不動(dong)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)安全性能比較高，廣泛用(yong)在易燃易爆等防爆要求高的(de)場所。但安裝使用(yong)需要儀(yi)表氣源(yuan)，多(duo)只使用(yong)比較合(he)算，可以建立(li)氣源(yuan)基地。