一、行程開關有什么作用

行程開關是一種常用的小電流主令電器，是一種根據運動部件的行程位置而切換電路工作狀態的控制電器，它的作用主要是通過改變電動機的運動狀態，從而控制機械動作或用于程序控制，并實現電路間的切換。在電氣控制系統中，行程開關的作用是實現順序控制、定位控制和位置狀態的檢測，用于控制機械設備的行程及限位保護，因此也叫限位開關。行程開關在很多生活電器以及工業領域都有廣泛的應用，如果您需要購買行程開關，可以先來看看行程開關十大品牌。

二、行程開關符號是什么

行程(cheng)開關(guan)是根據運動部件位置而切換電(dian)路的自動控(kong)制電(dian)器(qi)，廣泛用于各(ge)類機床和起(qi)重機械(xie)，用以控(kong)制其行程(cheng)、進行終(zhong)端限位保(bao)護，電(dian)工常用各(ge)種符(fu)號來表(biao)(biao)示(shi)開關(guan)等電(dian)器(qi)元件，在(zai)電(dian)路圖上，行程(cheng)開關(guan)用SQ表(biao)(biao)示(shi)，有的也(ye)會用ST表(biao)(biao)示(shi)，文字(zi)符(fu)號SQ是國(guo)家標準，ST是國(guo)際標準，都(dou)是對的，但是國(guo)內一般情況下(xia)都(dou)是用SQ。

三、行程開關工作原理

行程開(kai)關(guan)(guan)(guan)是主令(ling)電(dian)(dian)器(qi)里(li)的(de)一種，其動(dong)(dong)作(zuo)原(yuan)理和按鈕沒有什么差別，主要區別是：它(ta)不是用手進(jin)行按壓操(cao)作(zuo)而是用機(ji)械(xie)(xie)(xie)設備的(de)一些(xie)運(yun)動(dong)(dong)部(bu)件與它(ta)的(de)傳動(dong)(dong)部(bu)位(wei)發生(sheng)碰撞(zhuang)，來促使行程開(kai)關(guan)(guan)(guan)的(de)觸(chu)頭動(dong)(dong)作(zuo)的(de)（常開(kai)觸(chu)點閉合，常閉觸(chu)點斷(duan)開(kai)），能夠達到(dao)分斷(duan)或者(zhe)切換電(dian)(dian)路的(de)目(mu)的(de)。行程開(kai)關(guan)(guan)(guan)工作(zuo)時，利用內部(bu)的(de)元件碰撞(zhuang)，達到(dao)開(kai)啟電(dian)(dian)路或關(guan)(guan)(guan)閉電(dian)(dian)路的(de)功能。正(zheng)常情況(kuang)下，行程開(kai)關(guan)(guan)(guan)一旦(dan)開(kai)啟，便(bian)會給機(ji)械(xie)(xie)(xie)運(yun)動(dong)(dong)添加上一個運(yun)動(dong)(dong)的(de)軌跡，只要機(ji)械(xie)(xie)(xie)達到(dao)設定的(de)位(wei)置，便(bian)會自動(dong)(dong)停止運(yun)轉，或是改(gai)變運(yun)動(dong)(dong)狀態(tai)，從而達到(dao)開(kai)關(guan)(guan)(guan)的(de)目(mu)的(de)。

四、行程開關和限位開關有什么區別

1、定(ding)義區(qu)別(bie)：行程(cheng)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)一(yi)(yi)般(ban)指一(yi)(yi)種(zhong)小(xiao)電(dian)(dian)流(liu)主令電(dian)(dian)器(qi)，當生(sheng)產機(ji)(ji)械(xie)(xie)(xie)運(yun)動(dong)(dong)(dong)(dong)(dong)部件發生(sheng)碰撞(zhuang)時(shi)(shi)，通(tong)過(guo)觸頭動(dong)(dong)(dong)(dong)(dong)作(zuo)的(de)(de)(de)(de)(de)(de)(de)(de)(de)發生(sheng)，來(lai)(lai)(lai)(lai)實現(xian)分斷(duan)或接(jie)通(tong)電(dian)(dian)路，從(cong)而達到控(kong)制(zhi)(zhi)電(dian)(dian)器(qi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)目的(de)(de)(de)(de)(de)(de)(de)(de)(de)。行程(cheng)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)可以(yi)(yi)(yi)用(yong)(yong)(yong)(yong)來(lai)(lai)(lai)(lai)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)(zhi)機(ji)(ji)械(xie)(xie)(xie)運(yun)動(dong)(dong)(dong)(dong)(dong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)形(xing)成(cheng)和(he)(he)(he)(he)位(wei)(wei)(wei)置(zhi)。讓運(yun)動(dong)(dong)(dong)(dong)(dong)機(ji)(ji)械(xie)(xie)(xie)的(de)(de)(de)(de)(de)(de)(de)(de)(de)形(xing)成(cheng)或位(wei)(wei)(wei)置(zhi)反向(xiang)運(yun)動(dong)(dong)(dong)(dong)(dong)、自動(dong)(dong)(dong)(dong)(dong)停止、變速(su)(su)運(yun)動(dong)(dong)(dong)(dong)(dong)等(deng)(deng)(deng)等(deng)(deng)(deng)。限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)可以(yi)(yi)(yi)分為接(jie)觸式(shi)(shi)和(he)(he)(he)(he)非(fei)接(jie)觸式(shi)(shi)兩種(zhong)，它(ta)(ta)(ta)是(shi)(shi)(shi)一(yi)(yi)種(zhong)可以(yi)(yi)(yi)用(yong)(yong)(yong)(yong)來(lai)(lai)(lai)(lai)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)定(ding)機(ji)(ji)械(xie)(xie)(xie)設備的(de)(de)(de)(de)(de)(de)(de)(de)(de)運(yun)動(dong)(dong)(dong)(dong)(dong)極(ji)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)置(zhi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)電(dian)(dian)器(qi)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)。限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)更(geng)加直觀，它(ta)(ta)(ta)對機(ji)(ji)械(xie)(xie)(xie)有(you)一(yi)(yi)定(ding)的(de)(de)(de)(de)(de)(de)(de)(de)(de)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)(zhi)作(zuo)用(yong)(yong)(yong)(yong)，可以(yi)(yi)(yi)用(yong)(yong)(yong)(yong)來(lai)(lai)(lai)(lai)保護開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)不(bu)受損壞。非(fei)接(jie)觸式(shi)(shi)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)有(you)很多(duo)種(zhong)，比(bi)(bi)(bi)如(ru)干(gan)簧(huang)管式(shi)(shi)、光電(dian)(dian)式(shi)(shi)、感(gan)應式(shi)(shi)等(deng)(deng)(deng)等(deng)(deng)(deng)。2、功能(neng)區(qu)別(bie)：行程(cheng)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)可以(yi)(yi)(yi)安裝(zhuang)(zhuang)在(zai)(zai)(zai)(zai)(zai)(zai)靜止的(de)(de)(de)(de)(de)(de)(de)(de)(de)物體(ti)(ti)上(shang)面，比(bi)(bi)(bi)如(ru)門框或固定(ding)架等(deng)(deng)(deng)等(deng)(deng)(deng)。它(ta)(ta)(ta)也(ye)(ye)可以(yi)(yi)(yi)安裝(zhuang)(zhuang)在(zai)(zai)(zai)(zai)(zai)(zai)運(yun)動(dong)(dong)(dong)(dong)(dong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)物體(ti)(ti)上(shang)面，比(bi)(bi)(bi)如(ru)平時(shi)(shi)生(sheng)活中(zhong)使(shi)用(yong)(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)門。當運(yun)動(dong)(dong)(dong)(dong)(dong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)物體(ti)(ti)接(jie)近(jin)靜止的(de)(de)(de)(de)(de)(de)(de)(de)(de)物體(ti)(ti)時(shi)(shi)，開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)接(jie)點會(hui)(hui)引起(qi)閉合或斷(duan)開(kai)(kai)(kai)(kai)(kai)(kai)，從(cong)而控(kong)制(zhi)(zhi)電(dian)(dian)路的(de)(de)(de)(de)(de)(de)(de)(de)(de)動(dong)(dong)(dong)(dong)(dong)作(zuo)。而且(qie)行程(cheng)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)靈敏度比(bi)(bi)(bi)較(jiao)高，體(ti)(ti)積也(ye)(ye)比(bi)(bi)(bi)較(jiao)小(xiao)，還具(ju)有(you)防腐蝕性和(he)(he)(he)(he)耐用(yong)(yong)(yong)(yong)性等(deng)(deng)(deng)諸多(duo)特(te)點。最(zui)(zui)重要的(de)(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)，行程(cheng)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)即(ji)便是(shi)(shi)(shi)在(zai)(zai)(zai)(zai)(zai)(zai)水(shui)里，也(ye)(ye)能(neng)正常(chang)工(gong)作(zuo)。不(bu)僅(jin)價格實惠(hui)，而且(qie)使(shi)用(yong)(yong)(yong)(yong)壽命長。限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)分為極(ji)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)和(he)(he)(he)(he)工(gong)作(zuo)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)。工(gong)作(zuo)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)可以(yi)(yi)(yi)用(yong)(yong)(yong)(yong)來(lai)(lai)(lai)(lai)給(gei)出(chu)機(ji)(ji)構動(dong)(dong)(dong)(dong)(dong)作(zuo)到位(wei)(wei)(wei)信號，一(yi)(yi)般(ban)安裝(zhuang)(zhuang)在(zai)(zai)(zai)(zai)(zai)(zai)機(ji)(ji)構需(xu)要改變工(gong)況的(de)(de)(de)(de)(de)(de)(de)(de)(de)位(wei)(wei)(wei)置(zhi)上(shang)，在(zai)(zai)(zai)(zai)(zai)(zai)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)動(dong)(dong)(dong)(dong)(dong)作(zuo)發出(chu)后給(gei)出(chu)信號，然(ran)后再進行別(bie)的(de)(de)(de)(de)(de)(de)(de)(de)(de)動(dong)(dong)(dong)(dong)(dong)作(zuo)。極(ji)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)可以(yi)(yi)(yi)防止機(ji)(ji)構動(dong)(dong)(dong)(dong)(dong)作(zuo)超出(chu)設計范圍，發生(sheng)意(yi)外事(shi)故。一(yi)(yi)般(ban)安裝(zhuang)(zhuang)在(zai)(zai)(zai)(zai)(zai)(zai)器(qi)械(xie)(xie)(xie)動(dong)(dong)(dong)(dong)(dong)作(zuo)的(de)(de)(de)(de)(de)(de)(de)(de)(de)最(zui)(zui)遠處，用(yong)(yong)(yong)(yong)來(lai)(lai)(lai)(lai)防止器(qi)械(xie)(xie)(xie)動(dong)(dong)(dong)(dong)(dong)作(zuo)過(guo)大(da)，出(chu)現(xian)器(qi)械(xie)(xie)(xie)損壞的(de)(de)(de)(de)(de)(de)(de)(de)(de)情(qing)況。3、用(yong)(yong)(yong)(yong)途區(qu)別(bie)：行程(cheng)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)應用(yong)(yong)(yong)(yong)比(bi)(bi)(bi)較(jiao)廣(guang)泛。最(zui)(zui)典型的(de)(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)在(zai)(zai)(zai)(zai)(zai)(zai)冰(bing)(bing)箱(xiang)方面的(de)(de)(de)(de)(de)(de)(de)(de)(de)使(shi)用(yong)(yong)(yong)(yong)，在(zai)(zai)(zai)(zai)(zai)(zai)打開(kai)(kai)(kai)(kai)(kai)(kai)冰(bing)(bing)箱(xiang)門的(de)(de)(de)(de)(de)(de)(de)(de)(de)時(shi)(shi)候，冰(bing)(bing)箱(xiang)里面的(de)(de)(de)(de)(de)(de)(de)(de)(de)燈(deng)就會(hui)(hui)自動(dong)(dong)(dong)(dong)(dong)亮(liang)起(qi)，當關(guan)(guan)(guan)(guan)(guan)(guan)上(shang)冰(bing)(bing)箱(xiang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)門后，冰(bing)(bing)箱(xiang)里面的(de)(de)(de)(de)(de)(de)(de)(de)(de)燈(deng)就會(hui)(hui)自動(dong)(dong)(dong)(dong)(dong)熄滅。不(bu)但(dan)(dan)方便了(le)(le)人們的(de)(de)(de)(de)(de)(de)(de)(de)(de)日常(chang)生(sheng)活，而且(qie)也(ye)(ye)更(geng)加節約能(neng)源，減(jian)少資源浪費。除了(le)(le)在(zai)(zai)(zai)(zai)(zai)(zai)冰(bing)(bing)箱(xiang)上(shang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)運(yun)用(yong)(yong)(yong)(yong)，日常(chang)使(shi)用(yong)(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)洗(xi)衣機(ji)(ji)也(ye)(ye)運(yun)用(yong)(yong)(yong)(yong)了(le)(le)行程(cheng)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)，特(te)別(bie)是(shi)(shi)(shi)在(zai)(zai)(zai)(zai)(zai)(zai)洗(xi)衣機(ji)(ji)脫水(shui)的(de)(de)(de)(de)(de)(de)(de)(de)(de)時(shi)(shi)候，脫水(shui)桶會(hui)(hui)高速(su)(su)運(yun)轉，有(you)的(de)(de)(de)(de)(de)(de)(de)(de)(de)老(lao)人或小(xiao)孩兒安全(quan)意(yi)識(shi)較(jiao)差。可能(neng)會(hui)(hui)在(zai)(zai)(zai)(zai)(zai)(zai)洗(xi)衣機(ji)(ji)脫水(shui)的(de)(de)(de)(de)(de)(de)(de)(de)(de)時(shi)(shi)候，打開(kai)(kai)(kai)(kai)(kai)(kai)洗(xi)衣機(ji)(ji)蓋(gai)，這本身是(shi)(shi)(shi)非(fei)常(chang)危(wei)險的(de)(de)(de)(de)(de)(de)(de)(de)(de)行為。但(dan)(dan)應用(yong)(yong)(yong)(yong)了(le)(le)行程(cheng)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)后，就能(neng)很好的(de)(de)(de)(de)(de)(de)(de)(de)(de)改善這種(zhong)問題，從(cong)而保證了(le)(le)用(yong)(yong)(yong)(yong)戶的(de)(de)(de)(de)(de)(de)(de)(de)(de)安全(quan)。行程(cheng)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)在(zai)(zai)(zai)(zai)(zai)(zai)起(qi)重機(ji)(ji)械(xie)(xie)(xie)、電(dian)(dian)梯控(kong)制(zhi)(zhi)電(dian)(dian)路等(deng)(deng)(deng)等(deng)(deng)(deng)許多(duo)領域(yu)也(ye)(ye)已經廣(guang)泛運(yun)用(yong)(yong)(yong)(yong)，發揮了(le)(le)它(ta)(ta)(ta)的(de)(de)(de)(de)(de)(de)(de)(de)(de)優勢。限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)用(yong)(yong)(yong)(yong)途也(ye)(ye)很廣(guang)，不(bu)僅(jin)是(shi)(shi)(shi)在(zai)(zai)(zai)(zai)(zai)(zai)家用(yong)(yong)(yong)(yong)電(dian)(dian)器(qi)和(he)(he)(he)(he)工(gong)業控(kong)制(zhi)(zhi)上(shang)等(deng)(deng)(deng)等(deng)(deng)(deng)。在(zai)(zai)(zai)(zai)(zai)(zai)電(dian)(dian)梯井道的(de)(de)(de)(de)(de)(de)(de)(de)(de)最(zui)(zui)上(shang)方和(he)(he)(he)(he)最(zui)(zui)下方會(hui)(hui)安裝(zhuang)(zhuang)限(xian)(xian)(xian)(xian)(xian)(xian)(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)(kai)(kai)(kai)關(guan)(guan)(guan)(guan)(guan)(guan)，用(yong)(yong)(yong)(yong)來(lai)(lai)(lai)(lai)控(kong)制(zhi)(zhi)電(dian)(dian)梯的(de)(de)(de)(de)(de)(de)(de)(de)(de)停止和(he)(he)(he)(he)減(jian)速(su)(su)。在(zai)(zai)(zai)(zai)(zai)(zai)錄(lu)像機(ji)(ji)和(he)(he)(he)(he)錄(lu)音機(ji)(ji)中(zhong)，常(chang)常(chang)會(hui)(hui)用(yong)(yong)(yong)(yong)到倒退或者快進，這時(shi)(shi)磁(ci)帶(dai)會(hui)(hui)快速(su)(su)地轉動(dong)(dong)(dong)(dong)(dong)。但(dan)(dan)是(shi)(shi)(shi)到達磁(ci)帶(dai)端點的(de)(de)(de)(de)(de)(de)(de)(de)(de)時(shi)(shi)候，就會(hui)(hui)自動(dong)(dong)(dong)(dong)(dong)停下來(lai)(lai)(lai)(lai)。