一、什么是電動球閥和氣動球閥
1、電動球閥,英(ying)文名稱:motor-driven ball valve 或者 electric ball valve。電(dian)(dian)動(dong)球(qiu)閥通(tong)常(chang)由電(dian)(dian)動(dong)執(zhi)行機(ji)構(gou)和球(qiu)閥連接起來(lai),經(jing)過安裝(zhuang)調試后成為(wei)電(dian)(dian)動(dong)球(qiu)閥。電(dian)(dian)動(dong)球(qiu)閥使用電(dian)(dian)能(neng)作為(wei)動(dong)力(li)來(lai)接通(tong)電(dian)(dian)動(dong)執(zhi)行機(ji)構(gou)驅動(dong)球(qiu)閥,實現球(qiu)閥的開關(guan)、調節(jie)動(dong)作,從(cong)而達(da)到對管(guan)道介質的開關(guan)或是調節(jie)目的。
2、氣動球閥是球(qiu)閥(fa)(fa)配上(shang)氣(qi)(qi)(qi)(qi)動(dong)(dong)(dong)執行器。由氣(qi)(qi)(qi)(qi)源為動(dong)(dong)(dong)力來驅動(dong)(dong)(dong)球(qiu)閥(fa)(fa)開(kai)(kai)啟和關(guan)閉,從而實現(xian)對(dui)介質(zhi)的開(kai)(kai)關(guan)、調節動(dong)(dong)(dong)作,從而達(da)到對(dui)管道介質(zhi)的開(kai)(kai)關(guan)或(huo)是調節目的自動(dong)(dong)(dong)化(hua)裝(zhuang)置(zhi)。氣(qi)(qi)(qi)(qi)動(dong)(dong)(dong)球(qiu)閥(fa)(fa)通常配置(zhi)各種附件,比如電磁閥(fa)(fa)、氣(qi)(qi)(qi)(qi)源處(chu)理三聯件、限位(wei)開(kai)(kai)關(guan)、定位(wei)器、控制(zhi)箱等,以實現(xian)就地控制(zhi)和遠距離集中控制(zhi),在控制(zhi)室里就可以控制(zhi)閥(fa)(fa)門(men)的開(kai)(kai)關(guan),不(bu)(bu)需要(yao)跑(pao)到現(xian)場或(huo)者(zhe)高空(kong)和危險地帶來手(shou)動(dong)(dong)(dong)控制(zhi),在很大(da)程度上(shang)節約了人(ren)力資源以及時間(jian)和安全性。氣(qi)(qi)(qi)(qi)動(dong)(dong)(dong)球(qiu)閥(fa)(fa)具體分類有(you):不(bu)(bu)銹鋼氣(qi)(qi)(qi)(qi)動(dong)(dong)(dong)球(qiu)閥(fa)(fa),塑料氣(qi)(qi)(qi)(qi)動(dong)(dong)(dong)球(qiu)閥(fa)(fa),衛生級氣(qi)(qi)(qi)(qi)動(dong)(dong)(dong)球(qiu)閥(fa)(fa),碳鋼氣(qi)(qi)(qi)(qi)動(dong)(dong)(dong)球(qiu)閥(fa)(fa),二通氣(qi)(qi)(qi)(qi)動(dong)(dong)(dong)球(qiu)閥(fa)(fa),三通氣(qi)(qi)(qi)(qi)動(dong)(dong)(dong)球(qiu)閥(fa)(fa),四通氣(qi)(qi)(qi)(qi)動(dong)(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)作力距比電動(dong)(dong)(dong)球閥(fa)大,氣(qi)(qi)動(dong)(dong)(dong)閥(fa)門開關動(dong)(dong)(dong)作速(su)度可以調(diao)整,結構(gou)簡(jian)單(dan),易維護,動(dong)(dong)(dong)作過程中因氣(qi)(qi)體本(ben)身的緩沖特性,不(bu)易因卡住而損壞,但必須有氣(qi)(qi)源,且其控制(zhi)系統也比電動(dong)(dong)(dong)閥(fa)門復(fu)雜(za)。氣(qi)(qi)動(dong)(dong)(dong)閥(fa)門響應靈敏,安全可靠,很多對控制(zhi)要求高的廠專為氣(qi)(qi)動(dong)(dong)(dong)儀(yi)表控制(zhi)元件設置壓縮空氣(qi)(qi)站。氣(qi)(qi)動(dong)(dong)(dong)閥(fa)門執行機(ji)構(gou)動(dong)(dong)(dong)力源為氣(qi)(qi)源,氣(qi)(qi)源來源于空壓機(ji),采(cai)用定位(wei)器將電控信(xin)號轉換成氣(qi)(qi)動(dong)(dong)(dong)控制(zhi)信(xin)號,驅動(dong)(dong)(dong)氣(qi)(qi)動(dong)(dong)(dong)執行機(ji)構(gou)進行閥(fa)位(wei)調(diao)節(jie)。
2、電動閥門執(zhi)(zhi)行機構動(dong)力源(yuan)為(wei)電源(yuan),如果(guo)線路(lu)板或電機出現故障(zhang)容易出現火花,所以(yi)(yi)一般(ban)應(ying)(ying)用在環境要求不(bu)高和沒(mei)有危險(xian)的場合。就氣(qi)動(dong)執(zhi)(zhi)行機構和電動(dong)執(zhi)(zhi)行機構調(diao)(diao)節性能(neng)比較(jiao),氣(qi)動(dong)執(zhi)(zhi)行機構響應(ying)(ying)速度更快(kuai),能(neng)更適合應(ying)(ying)用在調(diao)(diao)節工況(kuang),所以(yi)(yi)生產調(diao)(diao)節閥的廠家都同時生產氣(qi)動(dong)執(zhi)(zhi)行機構與之(zhi)配套。
3、氣動球閥(fa)(fa)比電動球閥(fa)(fa)響應速度快,一般(ban)氣動球閥(fa)(fa)的(de)(de)開(kai)關(guan)時(shi)間(jian)為6秒左(zuo)右,而電動球閥(fa)(fa)的(de)(de)開(kai)關(guan)時(shi)間(jian)一般(ban)為15-20秒。
4、電動(dong)閥(fa)門(men)和氣(qi)動(dong)閥(fa)門(men)的(de)(de)本質區別(bie)在于使(shi)用不(bu)同的(de)(de)驅(qu)動(dong)裝置,也就是(shi)執(zhi)行機構(gou),配合不(bu)同的(de)(de)執(zhi)行機構(gou)主要(yao)(yao)是(shi)工況要(yao)(yao)求(qiu),如化工等要(yao)(yao)求(qiu)防爆的(de)(de)場合,使(shi)用最多(duo)的(de)(de)是(shi)氣(qi)動(dong)閥(fa)門(men),因為安全性要(yao)(yao)求(qiu)高,而且價格便宜,配合智能定位器可以上(shang)總線,控制方式也簡單。
5、電動球閥優點:對液(ye)體(ti)介質(zhi)和大(da)管徑氣體(ti)效果好,不(bu)受(shou)氣候(hou)影響(xiang)。不(bu)受(shou)空壓氣的壓力影響(xiang)。缺點:成本高、在(zai)潮(chao)濕環境不(bu)好。
6、氣動球(qiu)閥優點:對氣(qi)體(ti)介質和(he)小管(guan)徑液體(ti)效(xiao)果好,成(cheng)本低,維護方便。缺(que)點:受空壓(ya)氣(qi)壓(ya)力波動(dong)的(de)影響,在北方冬(dong)季易受空壓(ya)氣(qi)含水(shui)影響,造(zao)成(cheng)傳動(dong)部分凍結、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(ying)速度快,其安全性能(neng)比較高(gao),廣泛用在易燃易爆(bao)等防爆(bao)要求高(gao)的場所。但安裝使用需(xu)要儀表氣(qi)源,多只(zhi)使用比較合(he)算,可以(yi)建立氣(qi)源基地。