QDA電(dian)裝(zhuang)(zhuang)(zhuang)(zhuang)系列螺桿(gan)啟閉(bi)(bi)機(ji)為機(ji)電(dian)一(yi)體化全密封(feng)結構(gou)，適(shi)用(yong)(yong)于戶外(wai)工作(zuo)，采用(yong)(yong)蝸輪蝸桿(gan)傳動(dong)(dong)(dong)(dong)。內(nei)設行(xing)程(cheng)限(xian)位(wei)(wei)和扭(niu)矩保護(hu)裝(zhuang)(zhuang)(zhuang)(zhuang)置(zhi)，行(xing)程(cheng)限(xian)位(wei)(wei)裝(zhuang)(zhuang)(zhuang)(zhuang)置(zhi)由一(yi)組計(ji)數齒輪和硬觸(chu)點限(xian)位(wei)(wei)開(kai)關構(gou)成，當閘(zha)(zha)門(men)開(kai)或關到位(wei)(wei)時，計(ji)數齒輪帶動(dong)(dong)(dong)(dong)行(xing)程(cheng)限(xian)位(wei)(wei)桿(gan)，使硬觸(chu)點限(xian)位(wei)(wei)開(kai)關工作(zuo)，自動(dong)(dong)(dong)(dong)停止閘(zha)(zha)門(men)開(kai)、關動(dong)(dong)(dong)(dong)作(zuo)，當由于某(mou)種(zhong)原因行(xing)程(cheng)限(xian)位(wei)(wei)開(kai)關未動(dong)(dong)(dong)(dong)作(zuo)引起(qi)扭(niu)矩增大(da)時，扭(niu)矩保護(hu)開(kai)關動(dong)(dong)(dong)(dong)作(zuo)，保護(hu)啟閉(bi)(bi)裝(zhuang)(zhuang)(zhuang)(zhuang)置(zhi)不(bu)受意(yi)外(wai)損(sun)傷。電(dian)動(dong)(dong)(dong)(dong)裝(zhuang)(zhuang)(zhuang)(zhuang)置(zhi)上另(ling)設計(ji)指(zhi)針(zhen)式(shi)(shi)開(kai)度(du)指(zhi)示(shi)器、加熱電(dian)阻。指(zhi)針(zhen)式(shi)(shi)開(kai)度(du)指(zhi)示(shi)器與計(ji)數齒輪相連，能夠直(zhi)觀(guan)地反應出閘(zha)(zha)門(men)所處的(de)開(kai)度(du)位(wei)(wei)置(zhi)，加熱電(dian)阻在啟閉(bi)(bi)機(ji)工作(zuo)時自動(dong)(dong)(dong)(dong)接通(tong)，用(yong)(yong)以(yi)(yi)去除電(dian)動(dong)(dong)(dong)(dong)裝(zhuang)(zhuang)(zhuang)(zhuang)置(zhi)內(nei)的(de)潮氣，確(que)保內(nei)部(bu)干(gan)燥，保證各電(dian)器元件的(de)工作(zuo)可靠。啟閉(bi)(bi)螺母與電(dian)動(dong)(dong)(dong)(dong)裝(zhuang)(zhuang)(zhuang)(zhuang)置(zhi)輸出端(duan)采用(yong)(yong)牙嵌式(shi)(shi)連接器，牙嵌式(shi)(shi)連接器的(de)卡(ka)爪留有間隙，使閘(zha)(zha)門(men)開(kai)啟時的(de)瞬(shun)間產生(sheng)捶擊(ji)作(zuo)用(yong)(yong)，達(da)到捶擊(ji)啟動(dong)(dong)(dong)(dong)的(de)目(mu)的(de)，增大(da)閘(zha)(zha)門(men)啟閉(bi)(bi)時的(de)予起(qi)力(li)。鑄鐵(tie)支(zhi)座呈封(feng)閉(bi)(bi)式(shi)(shi)結構(gou)，用(yong)(yong)以(yi)(yi)承受啟閉(bi)(bi)閘(zha)(zha)門(men)時的(de)重力(li)或支(zhi)反力(li)，內(nei)裝(zhuang)(zhuang)(zhuang)(zhuang)承重軸承，外(wai)觀(guan)精美。