NUMATICS防暴電磁閥結構的說明

NUMATICS防(fang)暴電磁(ci)(ci)閥(fa)常與單(dan)作用氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)執(zhi)(zhi)行(xing)機(ji)構(gou)配套使用，兩(liang)(liang)位(wei)(wei)是兩(liang)(liang)個(ge)(ge)(ge)(ge)位(wei)(wei)置可控：開-關，三通(tong)(tong)是有三個(ge)(ge)(ge)(ge)通(tong)(tong)道通(tong)(tong)氣(qi)(qi)(qi)(qi)(qi)，般情況下1個(ge)(ge)(ge)(ge)通(tong)(tong)道與氣(qi)(qi)(qi)(qi)(qi)源連(lian)接(jie)(jie)，另(ling)外(wai)兩(liang)(liang)個(ge)(ge)(ge)(ge)通(tong)(tong)道1個(ge)(ge)(ge)(ge)與執(zhi)(zhi)行(xing)機(ji)構(gou)的(de)(de)進(jin)氣(qi)(qi)(qi)(qi)(qi)口(kou)(kou)(kou)連(lian)接(jie)(jie)，1個(ge)(ge)(ge)(ge)與執(zhi)(zhi)行(xing)機(ji)構(gou)排(pai)氣(qi)(qi)(qi)(qi)(qi)口(kou)(kou)(kou)連(lian)接(jie)(jie)，具體的(de)(de)工(gong)(gong)作原(yuan)理(li)可以參(can)照單(dan)作用氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)執(zhi)(zhi)行(xing)機(ji)構(gou)的(de)(de)工(gong)(gong)作原(yuan)理(li)圖。 BURKERT兩(liang)(liang)位(wei)(wei)兩(liang)(liang)通(tong)(tong)或(huo)兩(liang)(liang)位(wei)(wei)三通(tong)(tong)電磁(ci)(ci)閥(fa)通(tong)(tong)常與雙作用氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)執(zhi)(zhi)行(xing)機(ji)構(gou)配套使用，兩(liang)(liang)位(wei)(wei)是兩(liang)(liang)個(ge)(ge)(ge)(ge)位(wei)(wei)置可控：開-關，五通(tong)(tong)是有五個(ge)(ge)(ge)(ge)通(tong)(tong)道通(tong)(tong)氣(qi)(qi)(qi)(qi)(qi)，其中(zhong)1個(ge)(ge)(ge)(ge)與氣(qi)(qi)(qi)(qi)(qi)源連(lian)接(jie)(jie)，兩(liang)(liang)個(ge)(ge)(ge)(ge)與雙作用氣(qi)(qi)(qi)(qi)(qi)缸(gang)的(de)(de)外(wai)部(bu)氣(qi)(qi)(qi)(qi)(qi)室的(de)(de)進(jin)出(chu)(chu)氣(qi)(qi)(qi)(qi)(qi)口(kou)(kou)(kou)連(lian)接(jie)(jie)，兩(liang)(liang)個(ge)(ge)(ge)(ge)與內部(bu)氣(qi)(qi)(qi)(qi)(qi)室的(de)(de)進(jin)出(chu)(chu)氣(qi)(qi)(qi)(qi)(qi)口(kou)(kou)(kou)接(jie)(jie)連(lian)，具體的(de)(de)工(gong)(gong)作原(yuan)理(li)可參(can)照雙作用氣(qi)(qi)(qi)(qi)(qi)動(dong)(dong)執(zhi)(zhi)行(xing)機(ji)構(gou)工(gong)(gong)作原(yuan)理(li) 在氣(qi)(qi)(qi)(qi)(qi)路(lu)（或(huo)液路(lu)）上來說，兩(liang)(liang)位(wei)(wei)三通(tong)(tong)電磁(ci)(ci)閥(fa)具有1個(ge)(ge)(ge)(ge)進(jin)氣(qi)(qi)(qi)(qi)(qi)孔(kong)（接(jie)(jie)進(jin)氣(qi)(qi)(qi)(qi)(qi)氣(qi)(qi)(qi)(qi)(qi)源）、1個(ge)(ge)(ge)(ge)出(chu)(chu)氣(qi)(qi)(qi)(qi)(qi)孔(kong)（提供給目標設備氣(qi)(qi)(qi)(qi)(qi)源）、1個(ge)(ge)(ge)(ge)排(pai)氣(qi)(qi)(qi)(qi)(qi)孔(kong)（般安裝個(ge)(ge)(ge)(ge)消聲器，如果不(bu)怕噪(zao)音的(de)(de)話也可以不(bu)裝@_@）。

NUMATICS防(fang)暴(bao)電(dian)磁閥執(zhi)行(xing)機(ji)(ji)構(gou)類(lei)型的(de)確定：對執(zhi)行(xing)機(ji)(ji)構(gou)輸出力(li)確定后，根據工(gong)藝使用環境要(yao)求，選(xuan)擇相應(ying)的(de)執(zhi)行(xing)機(ji)(ji)構(gou)。對于(yu)現場有防(fang)爆(bao)要(yao)求時，應(ying)選(xuan)用氣(qi)動(dong)執(zhi)行(xing)機(ji)(ji)構(gou)。從節能方(fang)面考慮，應(ying)盡量(liang)選(xuan)用電(dian)動(dong)執(zhi)行(xing)機(ji)(ji)構(gou)。若(ruo)調節精度高(gao)，可選(xuan)擇液動(dong)執(zhi)行(xing)機(ji)(ji)構(gou)。如(ru)發電(dian)廠透明(ming)機(ji)(ji)的(de)速度調節、煉油廠的(de)催(cui)化裝置反應(ying)器的(de)溫度調節控(kong)制等。

NUMATICS防暴電磁閥的(de)作用(yong)(yong)(yong)方式(shi)只是在選(xuan)用(yong)(yong)(yong)氣(qi)動執行機構(gou)時才有，其作用(yong)(yong)(yong)方式(shi)通(tong)過執行機構(gou)正(zheng)反作用(yong)(yong)(yong)和閥門的(de)正(zheng)反作用(yong)(yong)(yong)組合形成(cheng)。組合形式(shi)有4種(zhong)即正(zheng)正(zheng)（氣(qi)關(guan)型(xing)(xing)）、正(zheng)反（氣(qi)開(kai)型(xing)(xing)）、反正(zheng)（氣(qi)開(kai)型(xing)(xing)）、反反（氣(qi)關(guan)型(xing)(xing)），通(tong)過這(zhe)四種(zhong)組合形成(cheng)的(de)調節閥作用(yong)(yong)(yong)方式(shi)有氣(qi)開(kai)和氣(qi)關(guan)兩(liang)種(zhong)。對于調節閥作用(yong)(yong)(yong)方式(shi)的(de)選(xuan)擇，主(zhu)要(yao)從(cong)三方面考慮:

NUMATICS防(fang)暴電磁(ci)閥(fa)(fa)響(xiang)應時間(jian)可(ke)(ke)以短幾個毫(hao)(hao)秒(miao)，即使是導式電磁(ci)閥(fa)(fa)也可(ke)(ke)以控(kong)(kong)制在幾十毫(hao)(hao)秒(miao)內。由于(yu)自(zi)成(cheng)回路，比之其它(ta)自(zi)控(kong)(kong)閥(fa)(fa)反應更(geng)靈敏(min)。設計得(de)當(dang)的電磁(ci)閥(fa)(fa)線(xian)圈功率消耗很(hen)低，屬節能產品；還(huan)可(ke)(ke)做到只需觸發動(dong)作，自(zi)動(dong)保持閥(fa)(fa)位，平時點(dian)也不耗電。電磁(ci)閥(fa)(fa)外形(xing)尺寸小，既節省(sheng)空(kong)間(jian)，又輕(qing)巧美觀。

NUMATICS防(fang)暴電磁閥可以設計成隨著(zhu)它被供(gong)給能(neng)量(liang)或(huo)失(shi)去能(neng)量(liang)而(er)使主(zhu)閥開(kai)(kai)啟（排(pai)放(fang)）的(de)兩種形式(shi)。若(ruo)采用(yong)供(gong)能(neng)釋放(fang)原理(li)，當萬(wan)發生(sheng)事故而(er)失(shi)去能(neng)量(liang)時，將(jiang)使主(zhu)閥保持(chi)關閉。因此，在(zai)這種場合使用(yong)的(de)導式(shi)安全(quan)閥采用(yong)系統介質(zhi)作為(wei)操(cao)(cao)作介質(zhi)是zui安全(quan)的(de)。不(bu)過，某(mou)些(xie)規范也允許采用(yong)外部操(cao)(cao)作介質(zhi)，只要(yao)這些(xie)操(cao)(cao)作介質(zhi)系由幾個獨(du)立的(de)能(neng)源供(gong)給，或(huo)者只要(yao)導式(shi)安全(quan)閥的(de)載荷是有(you)限(xian)的(de)。若(ruo)采用(yong)失(shi)能(neng)釋放(fang)原理(li)，失(shi)能(neng)將(jiang)使主(zhu)閥開(kai)(kai)啟。于是在(zai)這種情況下，導閥的(de)失(shi)效(xiao)保護操(cao)(cao)作將(jiang)不(bu)受操(cao)(cao)作介質(zhi)的(de)影響。

NUMATICS防暴電磁閥結構的說明NUMATICS防暴電磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)是(shi)(shi)利(li)用(yong)電磁(ci)(ci)(ci)鐵(tie)(tie)推動(dong)閥(fa)(fa)(fa)(fa)芯來(lai)控制(zhi)液流(liu)方(fang)向(xiang)(xiang)的(de)。采(cai)用(yong)電磁(ci)(ci)(ci)換向(xiang)(xiang)閥(fa)(fa)(fa)(fa)可(ke)以(yi)使操(cao)(cao)作輕便，容易實(shi)現自動(dong)化操(cao)(cao)作，因(yin)此應用(yong)極廣。電磁(ci)(ci)(ci)換向(xiang)(xiang)閥(fa)(fa)(fa)(fa)只是(shi)(shi)采(cai)用(yong)電磁(ci)(ci)(ci)鐵(tie)(tie)來(lai)操(cao)(cao)縱(zong)滑(hua)閥(fa)(fa)(fa)(fa)閥(fa)(fa)(fa)(fa)芯運動(dong)，而(er)閥(fa)(fa)(fa)(fa)芯的(de)結(jie)構(gou)及型式可(ke)以(yi)是(shi)(shi)各種各樣的(de)，所(suo)以(yi)電磁(ci)(ci)(ci)滑(hua)閥(fa)(fa)(fa)(fa)可(ke)以(yi)是(shi)(shi)二位(wei)(wei)二通(tong)(tong)、二位(wei)(wei)三通(tong)(tong)、二位(wei)(wei)四通(tong)(tong)、三位(wei)(wei)四通(tong)(tong)和(he)三位(wei)(wei)五通(tong)(tong)等多種型式。般(ban)二位(wei)(wei)閥(fa)(fa)(fa)(fa)用(yong)個電磁(ci)(ci)(ci)鐵(tie)(tie)，三位(wei)(wei)閥(fa)(fa)(fa)(fa)需用(yong)兩(liang)個電磁(ci)(ci)(ci)鐵(tie)(tie)。操(cao)(cao)縱(zong)電磁(ci)(ci)(ci)閥(fa)(fa)(fa)(fa)用(yong)的(de)電磁(ci)(ci)(ci)鐵(tie)(tie)分為交、直(zhi)流(liu)兩(liang)種，交流(liu)電磁(ci)(ci)(ci)鐵(tie)(tie)的(de)電壓般(ban)為220伏。其(qi)特點是(shi)(shi)啟動(dong)力(li)較(jiao)大(da)，換向(xiang)(xiang)時(shi)間短(duan)，價廉。但當(dang)閥(fa)(fa)(fa)(fa)芯卡住或吸(xi)力(li)不(bu)夠而(er)使鐵(tie)(tie)芯吸(xi)不(bu)上時(shi)，電磁(ci)(ci)(ci)鐵(tie)(tie)容易因(yin)電流(liu)過大(da)而(er)燒(shao)壞，故工作可(ke)靠(kao)性較(jiao)差，動(dong)作時(shi)有沖(chong)擊(ji)，壽命較(jiao)低(di)。直(zhi)流(liu)電磁(ci)(ci)(ci)鐵(tie)(tie)電壓般(ban)為24伏。其(qi)優點是(shi)(shi)工作可(ke)靠(kao)，不(bu)會因(yin)閥(fa)(fa)(fa)(fa)芯卡住而(er)燒(shao)壞，壽命長，體積小，但啟動(dong)力(li)較(jiao)交流(liu)電磁(ci)(ci)(ci)鐵(tie)(tie)小，而(er)且在無直(zhi)流(liu)電源時(shi)，需整流(liu)設(she)備。

NUMATICS防暴電磁閥(fa)(fa)的(de)(de)(de)流(liu)量(liang)(liang)(liang)恒(heng)定呢(ni)?其工(gong)作(zuo)原理如圖(tu)6.18所示。它的(de)(de)(de)導(dao)(dao)以(yi)固定節(jie)(jie)流(liu)孔I作(zuo)為(wei)流(liu)量(liang)(liang)(liang)傳(chuan)感器(qi)（Flow Sensor），將(jiang)流(liu)量(liang)(liang)(liang)轉化(hua)為(wei)I上的(de)(de)(de)壓(ya)(ya)(ya)(ya)力(li)差(cha)(cha)后與彈簧力(li)平衡，壓(ya)(ya)(ya)(ya)差(cha)(cha)恒(heng)定時流(liu)量(liang)(liang)(liang)自(zi)然恒(heng)定。通過(guo)可變節(jie)(jie)流(liu)口(kou)(kou)(kou)Ⅱ，可以(yi)自(zi)動調(diao)節(jie)(jie)流(liu)量(liang)(liang)(liang)。流(liu)量(liang)(liang)(liang)大(da)時，流(liu)量(liang)(liang)(liang)傳(chuan)感器(qi)（固定節(jie)(jie)流(liu)孔I）的(de)(de)(de)壓(ya)(ya)(ya)(ya)差(cha)(cha)則大(da)，該壓(ya)(ya)(ya)(ya)差(cha)(cha)作(zuo)用在(zai)活塞6上，壓(ya)(ya)(ya)(ya)縮彈簧，關(guan)小(xiao)可變節(jie)(jie)流(liu)口(kou)(kou)(kou)Ⅱ，將(jiang)導(dao)(dao)的(de)(de)(de)流(liu)量(liang)(liang)(liang)向減小(xiao)的(de)(de)(de)方(fang)向調(diao)節(jie)(jie)；反之(zhi)則增大(da)可變節(jie)(jie)流(liu)口(kou)(kou)(kou)Ⅱ，將(jiang)導(dao)(dao)的(de)(de)(de)流(liu)量(liang)(liang)(liang)向增大(da)的(de)(de)(de)方(fang)向調(diao)節(jie)(jie)。總之(zhi)自(zi)動維(wei)持導(dao)(dao)流(liu)量(liang)(liang)(liang)穩定。因此(ci)這種閥(fa)(fa)的(de)(de)(de)出(chu)口(kou)(kou)(kou)壓(ya)(ya)(ya)(ya)力(li)p2，與閥(fa)(fa)的(de)(de)(de)進口(kou)(kou)(kou)壓(ya)(ya)(ya)(ya)力(li)p1 ，以(yi)及流(liu)經(jing)主閥(fa)(fa)的(de)(de)(de)流(liu)量(liang)(liang)(liang)無關(guan)。如果閥(fa)(fa)的(de)(de)(de)出(chu)口(kou)(kou)(kou)壓(ya)(ya)(ya)(ya)力(li)出(chu)現沖擊，主閥(fa)(fa)芯上的(de)(de)(de)單(dan)向閥(fa)(fa)4將(jiang)迅速開啟卸壓(ya)(ya)(ya)(ya)，使閥(fa)(fa)的(de)(de)(de)出(chu)口(kou)(kou)(kou)壓(ya)(ya)(ya)(ya)力(li)很快降(jiang)低。在(zai)出(chu)口(kou)(kou)(kou)壓(ya)(ya)(ya)(ya)力(li)恢復到調(diao)定值后，單(dan)向閥(fa)(fa)重新關(guan)閉。

NUMATICS防暴電(dian)(dian)磁閥通(tong)過導線將(jiang)電(dian)(dian)磁閥體(ti)內線圈(quan)輸(shu)入(ru)(ru)正(zheng)(zheng)向(xiang)(xiang)脈(mo)(mo)沖(chong)信(xin)號，線圈(quan)產生的工作(zuo)磁通(tong)，使動芯吸合，打開閥門(men)。當停(ting)止正(zheng)(zheng)向(xiang)(xiang)脈(mo)(mo)沖(chong)信(xin)號輸(shu)入(ru)(ru)時(shi)，動芯釋放(fang)，動芯在(zai)彈簧力的作(zuo)用(yong)下(xia)回復(fu)到初始狀態，關閉閥門(men)，另(ling)外有(you)自保持型(xing)的，停(ting)止輸(shu)入(ru)(ru)正(zheng)(zheng)向(xiang)(xiang)脈(mo)(mo)沖(chong)或斷(duan)電(dian)(dian)后也能保持，需要輸(shu)入(ru)(ru)負向(xiang)(xiang)脈(mo)(mo)沖(chong)信(xin)號才能復(fu)位。脈(mo)(mo)沖(chong)電(dian)(dian)磁閥的工作(zuo)原理(li)是利(li)用(yong)電(dian)(dian)器的脈(mo)(mo)沖(chong)轉(zhuan)化為(wei)機(ji)械(xie)的脈(mo)(mo)動使得脈(mo)(mo)動氣體(ti)的強大(da)能量變成動量在(zai)短時(shi)間內釋放(fang)產生巨(ju)大(da)沖(chong)力，用(yong)plc控制其(qi)脈(mo)(mo)沖(chong)的間隔(ge)應(ying)根據額定氣體(ti)壓力恢復(fu)時(shi)間來確定.

NUMATICS防暴電磁閥(fa)進(jin)口(kou)(kou)壓(ya)力(li)(li)(li)p1未經穩壓(ya)，壓(ya)力(li)(li)(li)波動可(ke)能較大(da)，又(you)不利(li)(li)于導(dao)(dao)的(de)(de)控制(zhi)。為(wei)了減小(xiao)(xiao)(xiao)p1波動可(ke)能帶來的(de)(de)不利(li)(li)影響，保證(zheng)導(dao)(dao)的(de)(de)控制(zhi)精(jing)度(du)，可(ke)以在導(dao)(dao)進(jin)口(kou)(kou)處用(yong)個小(xiao)(xiao)(xiao)型“恒(heng)(heng)流(liu)(liu)器(qi)(qi)"（Constant Flow Regulation）代替原固(gu)定節(jie)(jie)流(liu)(liu)孔，通過“恒(heng)(heng)流(liu)(liu)器(qi)(qi)"的(de)(de)調節(jie)(jie)作(zuo)用(yong)使導(dao)(dao)的(de)(de)流(liu)(liu)量及導(dao)(dao)閥(fa)開口(kou)(kou)度(du)近(jin)似恒(heng)(heng)定，結果使有利(li)(li)于提高主閥(fa)上腔(qiang)壓(ya)力(li)(li)(li)p3的(de)(de)穩壓(ya)精(jing)度(du)。圖6.19所示就(jiu)是種導(dao)(dao)由(you)(you)減壓(ya)進(jin)口(kou)(kou)供油的(de)(de)減壓(ya)閥(fa)。該閥(fa)導(dao)(dao)進(jin)口(kou)(kou)處設有“控制(zhi)油流(liu)(liu)量恒(heng)(heng)定器(qi)(qi)"6，它由(you)(you)個固(gu)定節(jie)(jie)流(liu)(liu)孔I和個可(ke)變(bian)節(jie)(jie)流(liu)(liu)口(kou)(kou)Ⅱ串聯而成。可(ke)變(bian)節(jie)(jie)流(liu)(liu)口(kou)(kou)借助于個可(ke)以軸向(xiang)移動的(de)(de)小(xiao)(xiao)(xiao)活塞來改變(bian)通油孔N的(de)(de)過流(liu)(liu)面積，從而改變(bian)液(ye)阻(zu)。小(xiao)(xiao)(xiao)活塞左端(duan)的(de)(de)固(gu)定節(jie)(jie)流(liu)(liu)孔，使小(xiao)(xiao)(xiao)活塞兩(liang)端(duan)出現壓(ya)力(li)(li)(li)差。小(xiao)(xiao)(xiao)活塞在此壓(ya)力(li)(li)(li)差和右(you)端(duan)彈簧的(de)(de)共同(tong)作(zuo)用(yong)下(xia)而處于某平(ping)衡位置。

NUMATICS防暴(bao)電(dian)(dian)(dian)磁(ci)閥(fa)般為雙電(dian)(dian)(dian)控（即雙線(xian)圈(quan)(quan)(quan)(quan)）。線(xian)圈(quan)(quan)(quan)(quan)電(dian)(dian)(dian)壓等(deng)般采用DC24V、AC220V等(deng)。 兩(liang)位三通(tong)(tong)(tong)(tong)電(dian)(dian)(dian)磁(ci)閥(fa)分(fen)為常(chang)閉(bi)型(xing)(xing)(xing)和(he)常(chang)開(kai)(kai)型(xing)(xing)(xing)兩(liang)種，常(chang)閉(bi)型(xing)(xing)(xing)指線(xian)圈(quan)(quan)(quan)(quan)沒(mei)通(tong)(tong)(tong)(tong)電(dian)(dian)(dian)時氣(qi)(qi)路是(shi)(shi)斷(duan)的(de)，常(chang)開(kai)(kai)型(xing)(xing)(xing)指線(xian)圈(quan)(quan)(quan)(quan)沒(mei)通(tong)(tong)(tong)(tong)電(dian)(dian)(dian)時氣(qi)(qi)路是(shi)(shi)通(tong)(tong)(tong)(tong)的(de)。 常(chang)閉(bi)型(xing)(xing)(xing)兩(liang)位三通(tong)(tong)(tong)(tong)電(dian)(dian)(dian)磁(ci)閥(fa)動(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)原(yuan)理(li)：給線(xian)圈(quan)(quan)(quan)(quan)通(tong)(tong)(tong)(tong)電(dian)(dian)(dian)，氣(qi)(qi)路接(jie)通(tong)(tong)(tong)(tong)，線(xian)圈(quan)(quan)(quan)(quan)旦斷(duan)電(dian)(dian)(dian)，氣(qi)(qi)路就會斷(duan)開(kai)(kai)，這相當于(yu)“點動(dong)(dong)(dong)(dong)"。 常(chang)開(kai)(kai)型(xing)(xing)(xing)兩(liang)位三通(tong)(tong)(tong)(tong)單電(dian)(dian)(dian)控電(dian)(dian)(dian)磁(ci)閥(fa)動(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)原(yuan)理(li)：給線(xian)圈(quan)(quan)(quan)(quan)通(tong)(tong)(tong)(tong)電(dian)(dian)(dian)，氣(qi)(qi)路斷(duan)開(kai)(kai)，線(xian)圈(quan)(quan)(quan)(quan)旦斷(duan)電(dian)(dian)(dian)，氣(qi)(qi)路就會接(jie)通(tong)(tong)(tong)(tong)，這也是(shi)(shi)“點動(dong)(dong)(dong)(dong)"。 兩(liang)位五通(tong)(tong)(tong)(tong)雙電(dian)(dian)(dian)控電(dian)(dian)(dian)磁(ci)閥(fa)動(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)原(yuan)理(li)：給正動(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)線(xian)圈(quan)(quan)(quan)(quan)通(tong)(tong)(tong)(tong)電(dian)(dian)(dian)，則正動(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)氣(qi)(qi)路接(jie)通(tong)(tong)(tong)(tong)（正動(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)出氣(qi)(qi)孔有氣(qi)(qi)），即使給正動(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)線(xian)圈(quan)(quan)(quan)(quan)斷(duan)電(dian)(dian)(dian)后正動(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)氣(qi)(qi)路仍然是(shi)(shi)接(jie)通(tong)(tong)(tong)(tong)的(de)，將會直(zhi)維持到給反動(dong)(dong)(dong)(dong)作(zuo)(zuo)(zuo)(zuo)(zuo)(zuo)線(xian)圈(quan)(quan)(quan)(quan)通(tong)(tong)(tong)(tong)電(dian)(dian)(dian)為止。