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 electric ball valve。電(dian)(dian)動(dong)(dong)球(qiu)閥(fa)通常由電(dian)(dian)動(dong)(dong)執(zhi)行機(ji)構和球(qiu)閥(fa)連接起來,經過(guo)安裝調試后成為(wei)電(dian)(dian)動(dong)(dong)球(qiu)閥(fa)。電(dian)(dian)動(dong)(dong)球(qiu)閥(fa)使用電(dian)(dian)能作為(wei)動(dong)(dong)力來接通電(dian)(dian)動(dong)(dong)執(zhi)行機(ji)構驅動(dong)(dong)球(qiu)閥(fa),實現球(qiu)閥(fa)的(de)開(kai)關(guan)、調節動(dong)(dong)作,從(cong)而達到對管道介(jie)質的(de)開(kai)關(guan)或是(shi)調節目的(de)。
2、氣動球閥是(shi)球(qiu)閥(fa)(fa)配上氣(qi)(qi)(qi)動(dong)(dong)執行器(qi)。由(you)氣(qi)(qi)(qi)源(yuan)(yuan)為動(dong)(dong)力來驅動(dong)(dong)球(qiu)閥(fa)(fa)開(kai)(kai)啟和(he)關閉,從(cong)而實現對介(jie)質的(de)開(kai)(kai)關、調節(jie)動(dong)(dong)作,從(cong)而達到對管道介(jie)質的(de)開(kai)(kai)關或(huo)(huo)是(shi)調節(jie)目的(de)自動(dong)(dong)化裝置。氣(qi)(qi)(qi)動(dong)(dong)球(qiu)閥(fa)(fa)通(tong)常配置各種(zhong)附件,比如電(dian)磁閥(fa)(fa)、氣(qi)(qi)(qi)源(yuan)(yuan)處理三聯件、限位(wei)開(kai)(kai)關、定(ding)位(wei)器(qi)、控制箱等,以(yi)實現就地(di)(di)控制和(he)遠距離集中控制,在(zai)控制室里就可(ke)以(yi)控制閥(fa)(fa)門(men)的(de)開(kai)(kai)關,不(bu)需(xu)要跑到現場或(huo)(huo)者高空(kong)和(he)危險地(di)(di)帶(dai)來手動(dong)(dong)控制,在(zai)很大程度上節(jie)約了人(ren)力資源(yuan)(yuan)以(yi)及(ji)時間和(he)安全性。氣(qi)(qi)(qi)動(dong)(dong)球(qiu)閥(fa)(fa)具體分類(lei)有:不(bu)銹鋼(gang)氣(qi)(qi)(qi)動(dong)(dong)球(qiu)閥(fa)(fa),塑料氣(qi)(qi)(qi)動(dong)(dong)球(qiu)閥(fa)(fa),衛(wei)生(sheng)級氣(qi)(qi)(qi)動(dong)(dong)球(qiu)閥(fa)(fa),碳鋼(gang)氣(qi)(qi)(qi)動(dong)(dong)球(qiu)閥(fa)(fa),二通(tong)氣(qi)(qi)(qi)動(dong)(dong)球(qiu)閥(fa)(fa),三通(tong)氣(qi)(qi)(qi)動(dong)(dong)球(qiu)閥(fa)(fa),四通(tong)氣(qi)(qi)(qi)動(dong)(dong)球(qiu)閥(fa)(fa)。
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(zuo)(zuo)力距比(bi)電動(dong)(dong)(dong)球閥(fa)大,氣(qi)(qi)動(dong)(dong)(dong)閥(fa)門(men)開(kai)關動(dong)(dong)(dong)作(zuo)(zuo)速(su)度可(ke)(ke)以調整,結構簡單,易(yi)維護,動(dong)(dong)(dong)作(zuo)(zuo)過(guo)程中因氣(qi)(qi)體本(ben)身(shen)的(de)緩沖特性,不易(yi)因卡住而損壞,但必須有氣(qi)(qi)源(yuan)(yuan)(yuan)(yuan),且(qie)其控制(zhi)(zhi)系統也比(bi)電動(dong)(dong)(dong)閥(fa)門(men)復雜(za)。氣(qi)(qi)動(dong)(dong)(dong)閥(fa)門(men)響(xiang)應靈敏,安全可(ke)(ke)靠,很多對控制(zhi)(zhi)要求高的(de)廠專為氣(qi)(qi)動(dong)(dong)(dong)儀表控制(zhi)(zhi)元(yuan)件設(she)置壓(ya)縮空(kong)氣(qi)(qi)站。氣(qi)(qi)動(dong)(dong)(dong)閥(fa)門(men)執行(xing)機(ji)構動(dong)(dong)(dong)力源(yuan)(yuan)(yuan)(yuan)為氣(qi)(qi)源(yuan)(yuan)(yuan)(yuan),氣(qi)(qi)源(yuan)(yuan)(yuan)(yuan)來(lai)源(yuan)(yuan)(yuan)(yuan)于空(kong)壓(ya)機(ji),采(cai)用(yong)定位器將電控信(xin)(xin)號轉換成氣(qi)(qi)動(dong)(dong)(dong)控制(zhi)(zhi)信(xin)(xin)號,驅動(dong)(dong)(dong)氣(qi)(qi)動(dong)(dong)(dong)執行(xing)機(ji)構進行(xing)閥(fa)位調節(jie)。
2、電動閥門執(zhi)行(xing)機(ji)(ji)(ji)構(gou)(gou)動(dong)力源為電源,如果(guo)線路板或電機(ji)(ji)(ji)出現(xian)故(gu)障(zhang)容(rong)易出現(xian)火花,所以一般(ban)應用在環境要求不高和沒有危(wei)險的(de)場合(he)。就(jiu)氣(qi)動(dong)執(zhi)行(xing)機(ji)(ji)(ji)構(gou)(gou)和電動(dong)執(zhi)行(xing)機(ji)(ji)(ji)構(gou)(gou)調節(jie)性能(neng)(neng)比較(jiao),氣(qi)動(dong)執(zhi)行(xing)機(ji)(ji)(ji)構(gou)(gou)響應速度更快,能(neng)(neng)更適合(he)應用在調節(jie)工況,所以生(sheng)(sheng)產調節(jie)閥(fa)的(de)廠家都同時(shi)生(sheng)(sheng)產氣(qi)動(dong)執(zhi)行(xing)機(ji)(ji)(ji)構(gou)(gou)與之配套(tao)。
3、氣(qi)動(dong)球(qiu)閥(fa)比電(dian)動(dong)球(qiu)閥(fa)響應(ying)速度快,一般氣(qi)動(dong)球(qiu)閥(fa)的開(kai)關(guan)時間(jian)為6秒左右,而電(dian)動(dong)球(qiu)閥(fa)的開(kai)關(guan)時間(jian)一般為15-20秒。
4、電動閥門(men)和氣動閥門(men)的(de)本質區別在于使用(yong)(yong)不(bu)同(tong)的(de)驅動裝置,也就是(shi)執行(xing)機(ji)構(gou),配合(he)不(bu)同(tong)的(de)執行(xing)機(ji)構(gou)主要是(shi)工況要求,如化工等(deng)要求防爆的(de)場合(he),使用(yong)(yong)最多的(de)是(shi)氣動閥門(men),因為(wei)安(an)全性(xing)要求高,而(er)且價格便(bian)宜,配合(he)智能定位器可以上總(zong)線(xian),控制方式也簡(jian)單。
5、電動球閥優點:對液(ye)體介質和大管徑氣(qi)體效(xiao)果好(hao),不(bu)受(shou)氣(qi)候影響。不(bu)受(shou)空(kong)壓氣(qi)的壓力影響。缺點:成本高、在潮濕環境不(bu)好(hao)。
6、氣動球閥優(you)點(dian):對氣(qi)體介質和小管徑(jing)液體效(xiao)果好,成本低(di),維護方(fang)(fang)便。缺點(dian):受空壓氣(qi)壓力(li)波動的影(ying)響,在(zai)北方(fang)(fang)冬季(ji)易受空壓氣(qi)含水影(ying)響,造成傳動部(bu)分凍(dong)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(kuai),其(qi)安全性能(neng)比較(jiao)高(gao)(gao),廣泛用(yong)在易燃易爆等(deng)防爆要(yao)(yao)求(qiu)高(gao)(gao)的場所。但安裝使用(yong)需要(yao)(yao)儀表氣(qi)(qi)源,多(duo)只(zhi)使用(yong)比較(jiao)合(he)算,可以建立(li)氣(qi)(qi)源基(ji)地。