鏈斗(dou)式(shi)(shi)挖(wa)(wa)沙(sha)(sha)船(chuan)是利用動力帶(dai)動鏈條(tiao)裝置旋(xuan)轉(zhuan)，間接(jie)帶(dai)動鏈斗(dou)轉(zhuan)動作(zuo)業的(de)(de)。挖(wa)(wa)沙(sha)(sha)船(chuan)的(de)(de)鏈條(tiao)都(dou)是由錳鋼等材料制成，具有(you)很強的(de)(de)承受力，可拉動幾(ji)噸(dun)的(de)(de)重量。鏈斗(dou)式(shi)(shi)挖(wa)(wa)沙(sha)(sha)船(chuan)的(de)(de)輸送(song)(song)帶(dai)有(you)單條(tiao)和雙條(tiao)兩種，單條(tiao)的(de)(de)只(zhi)能輸送(song)(song)成品沙(sha)(sha)；雙條(tiao)的(de)(de)則可以將成品沙(sha)(sha)和石(shi)子(zi)單獨輸送(song)(song)。目前常(chang)見有(you)單傳(chuan)送(song)(song)挖(wa)(wa)沙(sha)(sha)船(chuan)、雙傳(chuan)送(song)(song)挖(wa)(wa)沙(sha)(sha)船(chuan)、三(san)傳(chuan)送(song)(song)挖(wa)(wa)沙(sha)(sha)船(chuan)、四傳(chuan)送(song)(song)挖(wa)(wa)沙(sha)(sha)船(chuan)。
鏈斗式(shi)(shi)挖沙的(de)輸(shu)(shu)送砂石(shi)(shi)的(de)方(fang)式(shi)(shi)不單(dan)(dan)單(dan)(dan)局限于傳送式(shi)(shi)，有(you)的(de)挖沙船是(shi)用配套(tao)運輸(shu)(shu)船來運送沙石(shi)(shi)的(de)；有(you)的(de)則(ze)是(shi)用揚(yang)程(cheng)打(da)沙泵來輸(shu)(shu)送砂石(shi)(shi)的(de)。所以他們的(de)作業方(fang)式(shi)(shi)也(ye)不盡相(xiang)同。大(da)型(xing)的(de)挖沙船可(ke)以加裝(zhuang)水(shui)(shui)輪式(shi)(shi)洗沙設備(bei)，對于含泥(ni)量高的(de)河沙可(ke)以進(jin)行(xing)水(shui)(shui)洗除泥(ni)處理(li)。