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威格(ge)士電(dian)磁閥 威格(ge)士電(dian)磁閥里(li)有(you)密(mi)閉的(de)(de)(de)(de)腔(qiang),在(zai)不(bu)(bu)同位(wei)置開(kai)有(you)通(tong)(tong)(tong)孔,每個孔連接不(bu)(bu)同的(de)(de)(de)(de)油管(guan),腔(qiang)中間是活塞(sai),兩面是兩塊電(dian)磁鐵(tie),哪面的(de)(de)(de)(de)磁鐵(tie)線圈(quan)通(tong)(tong)(tong)電(dian)閥體(ti)就(jiu)(jiu)會被(bei)吸引到(dao)哪邊,通(tong)(tong)(tong)過控(kong)制(zhi)(zhi)閥體(ti)的(de)(de)(de)(de)移動(dong)來開(kai)啟(qi)或(huo)關閉不(bu)(bu)同的(de)(de)(de)(de)排(pai)油孔,而進(jin)油孔是常(chang)開(kai)的(de)(de)(de)(de),液壓油就(jiu)(jiu)會進(jin)入不(bu)(bu)同的(de)(de)(de)(de)排(pai)油管(guan),然后通(tong)(tong)(tong)過油的(de)(de)(de)(de)壓力來推動(dong)油缸(gang)的(de)(de)(de)(de)活塞(sai),活塞(sai)又帶動(dong)活塞(sai)桿,活塞(sai)桿帶動(dong)機(ji)械(xie)裝置。這樣通(tong)(tong)(tong)過控(kong)制(zhi)(zhi)電(dian)磁鐵(tie)的(de)(de)(de)(de)電(dian)流(liu)通(tong)(tong)(tong)斷就(jiu)(jiu)控(kong)制(zhi)(zhi)了機(ji)械(xie)運動(dong)。
選型依據:
1、根據管道參(can)數選擇電磁閥的:通(tong)徑規(gui)格(即(ji)DN)、接(jie)口方式
1)按照現場管道內徑(jing)尺寸(cun)或流量要求(qiu)來確定通徑(jing)(DN)尺寸(cun);
2)接口(kou)方式(shi),一般>DN50要選(xuan)擇法(fa)蘭接口(kou),≤DN50則可根據用戶需要自由選(xuan)擇。
2、根據流體參數選擇電磁閥的:材質、溫度組
1)腐蝕性流體:宜(yi)選(xuan)用耐腐蝕電磁閥和全不銹(xiu)鋼;食用超凈流體:宜(yi)選(xuan)用食品級不銹(xiu)鋼材質電磁閥;
2)高溫流體:要(yao)選(xuan)擇采用(yong)耐(nai)高溫的電(dian)工材料(liao)和密(mi)封材料(liao)制(zhi)造的電(dian)磁(ci)閥,而(er)且要(yao)選(xuan)擇活塞式結構類型的;
3)流體狀態:大(da)至有氣(qi)態,液態或混合(he)狀態,特別是口徑大(da)于DN25時一定要區分開來;
4)流體粘度:通常在50cSt以(yi)下(xia)可任意(yi)選擇,若(ruo)超過(guo)此值(zhi),則要選用高(gao)粘度電(dian)磁閥。
3、根據壓力參數(shu)選擇電磁閥的:原(yuan)理和結構品種
1)公(gong)稱壓力(li):這個參數與(yu)其它通用閥門的(de)含義(yi)是(shi)一樣的(de),是(shi)根據管道公(gong)稱壓力(li)來定;
2)工(gong)(gong)作壓(ya)力:如果工(gong)(gong)作壓(ya)力低則必須(xu)選(xuan)用直動(dong)(dong)(dong)或(huo)分步直動(dong)(dong)(dong)式原理;低工(gong)(gong)作壓(ya)差(cha)在(zai)0.04Mpa以上時直動(dong)(dong)(dong)式、分步直動(dong)(dong)(dong)式、先(xian)導式均可選(xuan)用。
4、電氣選擇:電壓規格應盡(jin)量優(you)先選用AC220V、DC24較為(wei)方便。
5、根據持續工作時(shi)間長短來(lai)選擇:常(chang)閉(bi)、常(chang)開、或(huo)可(ke)持續通電
1)當電(dian)磁閥(fa)需要長時(shi)(shi)間(jian)開啟(qi),并且持續的時(shi)(shi)間(jian)多于關閉的時(shi)(shi)間(jian)應選(xuan) 用(yong)常開型;
2)要是開啟的(de)(de)時間短或開和關的(de)(de)時間不(bu)多(duo)時,則選常(chang)閉型;
3)但是有(you)些用于(yu)安全(quan)保(bao)護的(de)工(gong)況(kuang),如爐(lu)、窯(yao)火(huo)焰監測,則不能選常開(kai)的(de),應選可長期通電(dian)型。
6、根據環境要求選擇輔(fu)助(zhu)功能:防爆、止回(hui)、手動、防水(shui)霧、水(shui)淋(lin)、潛水(shui)。
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