有(you)些起(qi)(qi)重設(she)備還具有(you)運(yun)(yun)行(xing)(xing)機(ji)構(gou)、變(bian)幅機(ji)構(gou)、回(hui)(hui)轉機(ji)構(gou)或(huo)其他(ta)的(de)工作(zuo)機(ji)構(gou)。物料可(ke)以由鋼絲(si)繩或(huo)起(qi)(qi)重鏈條等(deng)撓性件(jian)吊掛著(zhu)升(sheng)降(jiang)，也(ye)可(ke)由螺桿(gan)或(huo)其他(ta)剛(gang)性件(jian)頂舉。起(qi)(qi)重設(she)備是一種以間歇作(zuo)業方式(shi)對物料進行(xing)(xing)起(qi)(qi)升(sheng)、下降(jiang)、水(shui)平(ping)移動的(de)搬運(yun)(yun)機(ji)械，杭(hang)州(zhou)起(qi)(qi)重設(she)備，起(qi)(qi)重設(she)備的(de)作(zuo)業通常帶(dai)有(you)重復循環的(de)性質(zhi)。門座起(qi)(qi)重機(ji)能完成起(qi)(qi)升(sheng)、變(bian)幅、回(hui)(hui)轉和大車運(yun)(yun)行(xing)(xing)4個運(yun)(yun)動。在作(zuo)業過(guo)程中，常常是幾個不同方向(xiang)的(de)運(yun)(yun)動同時操作(zuo)，技術難度較大。

起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)機(ji)(ji)。起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)機(ji)(ji)是(shi)在(zai)一定范圍(wei)內垂直提(ti)升并(bing)水平(ping)(ping)搬運重(zhong)(zhong)(zhong)(zhong)物的多動作(zuo)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)設備(bei)。橋(qiao)式(shi)類型(xing)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)機(ji)(ji)包(bao)括橋(qiao)式(shi)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)機(ji)(ji)、特(te)種起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)機(ji)(ji)、門式(shi)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)機(ji)(ji)、裝卸(xie)橋(qiao)等。經濾油器、隔(ge)爆型(xing)電(dian)磁(ci)換向(xiang)閥、節流閥、液(ye)控(kong)單向(xiang)閥、平(ping)(ping)衡閥進入液(ye)缸下端，使液(ye)缸的活塞向(xiang)上運動，提(ti)升重(zhong)(zhong)(zhong)(zhong)物，液(ye)缸上端回(hui)油經隔(ge)爆型(xing)電(dian)磁(ci)換向(xiang)閥回(hui)到油箱。大多數起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)設備(bei)，智能起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)設備(bei)，需要在(zai)較大的空間(jian)范圍(wei)內運行，有(you)的要裝設軌道(dao)和車(che)輪(lun)（如塔吊(diao)、橋(qiao)吊(diao)等）；有(you)的要裝上輪(lun)胎或履帶在(zai)地面上行走（如汽車(che)吊(diao)、履帶吊(diao)等）。

起(qi)重(zhong)設(she)備所吊(diao)(diao)運的重(zhong)物(wu)(wu)多種多樣，室(shi)內起(qi)重(zhong)起(qi)重(zhong)設(she)備，載荷(he)是變(bian)(bian)化的。有(you)的重(zhong)物(wu)(wu)重(zhong)達(da)幾百噸乃至(zhi)上(shang)(shang)千噸，有(you)的物(wu)(wu)體長達(da)幾十米(mi)，形(xing)狀(zhuang)也很不規則，有(you)散粒、熱融狀(zhuang)態(tai)、危(wei)險(xian)物(wu)(wu)品等，吊(diao)(diao)運過程復雜而(er)(er)危(wei)險(xian)。重(zhong)物(wu)(wu)下降(jiang)(jiang)平穩，制動，在回油路(lu)上(shang)(shang)設(she)置平衡(heng)閥(fa)，平衡(heng)回路(lu)、保持壓力，使下降(jiang)(jiang)速度不受重(zhong)物(wu)(wu)而(er)(er)變(bian)(bian)化，由節(jie)流閥(fa)調(diao)節(jie)流量(liang)，控制升降(jiang)(jiang)速度。起(qi)重(zhong)設(she)備按結構不同可分為輕小型(xing)起(qi)重(zhong)設(she)備、升降(jiang)(jiang)機(ji)、起(qi)重(zhong)機(ji)和架空單軌系統等幾類(lei)。輕小型(xing)起(qi)重(zhong)設(she)備主要包括起(qi)重(zhong)滑車、吊(diao)(diao)具(ju)、千斤頂、手動葫(hu)蘆(lu)、電動葫(hu)蘆(lu)和普通(tong)絞(jiao)車。