一、行程開關是什么開關
行程開(kai)關(guan),很(hen)多人第(di)一次聽到(dao)后(hou)都不知(zhi)道是什么來的,具有什么作用,其實(shi)我們日常生(sheng)活很(hen)多電器(qi)產(chan)品都會用到(dao)行程開(kai)關(guan),它主要(yao)起(qi)連鎖保護的作用。
行(xing)程開(kai)(kai)關(guan)(guan),又(you)叫限位(wei)開(kai)(kai)關(guan)(guan)、位(wei)置開(kai)(kai)關(guan)(guan),是一(yi)種常用(yong)(yong)的(de)(de)小電(dian)(dian)流主令電(dian)(dian)器,利(li)用(yong)(yong)生(sheng)產機械(xie)運(yun)動(dong)(dong)(dong)部(bu)件(jian)的(de)(de)碰(peng)撞使其觸頭動(dong)(dong)(dong)作來(lai)(lai)實現接通或(huo)分斷(duan)控(kong)制(zhi)電(dian)(dian)路,達到一(yi)定的(de)(de)控(kong)制(zhi)目(mu)的(de)(de)。通常,這(zhe)類開(kai)(kai)關(guan)(guan)被用(yong)(yong)來(lai)(lai)限制(zhi)機械(xie)運(yun)動(dong)(dong)(dong)的(de)(de)位(wei)置或(huo)行(xing)程,使運(yun)動(dong)(dong)(dong)機械(xie)按(an)一(yi)定位(wei)置或(huo)行(xing)程自動(dong)(dong)(dong)停止、反向運(yun)動(dong)(dong)(dong)、變(bian)速(su)運(yun)動(dong)(dong)(dong)或(huo)自動(dong)(dong)(dong)往返(fan)運(yun)動(dong)(dong)(dong)等(deng),利(li)用(yong)(yong)內部(bu)的(de)(de)元件(jian)碰(peng)撞,達到開(kai)(kai)啟電(dian)(dian)路或(huo)關(guan)(guan)閉電(dian)(dian)路的(de)(de)功能。
在(zai)生活中(zhong),行(xing)(xing)程(cheng)開關(guan)(guan)的應用(yong)十分廣(guang)泛,比如冰箱中(zhong)的照明(ming)燈以(yi)及電梯(ti)的自動(dong)門(men)和(he)開關(guan)(guan)門(men)的速度,都是有行(xing)(xing)程(cheng)開關(guan)(guan)控(kong)(kong)制的。在(zai)工業中(zhong),可以(yi)和(he)其他設備配(pei)合使用(yong),形成(cheng)自動(dong)化控(kong)(kong)制系(xi)統(tong)。在(zai)起(qi)(qi)重機械的控(kong)(kong)制上,行(xing)(xing)程(cheng)開關(guan)(guan)就起(qi)(qi)到了保護終端限位(wei)的作用(yong)。通常(chang)行(xing)(xing)程(cheng)開關(guan)(guan)被用(yong)來(lai)限制機械運(yun)動(dong)的位(wei)置和(he)行(xing)(xing)程(cheng),使機械運(yun)動(dong)按照一定的位(wei)置和(he)行(xing)(xing)程(cheng)自行(xing)(xing)停(ting)止、反(fan)向(xiang)運(yun)動(dong)或自由往返(fan)運(yun)動(dong)。
二、行程開關符號是什么
行程開關是根據運動部件位置而切換電路的自動控制電器,廣泛用于各類機床和起重機械,用以控制其行程、進行終端限位保護,電工常用各種符號來表示開關等電器元件,那么行程開關的符號是什么呢?
一般(ban)來說,在電路圖(tu)上,行程開(kai)關用SQ表示,有(you)的也會用ST表示,文字符號SQ是(shi)(shi)國(guo)家標(biao)準,ST是(shi)(shi)國(guo)際標(biao)準,都是(shi)(shi)對的,但是(shi)(shi)國(guo)內一般(ban)情(qing)況(kuang)下都是(shi)(shi)用SQ。