電動(dòng)葫蘆是一種特起重設(shè)備，安裝在天車、龍門吊之上，電動(dòng)葫蘆具有體積小，自重輕，操作簡(jiǎn)單，使用方便等特點(diǎn)，用于工礦企業(yè)，倉(cāng)儲(chǔ)，碼頭等場(chǎng)所。
　　電動(dòng)葫蘆結(jié)構(gòu)緊湊，電機(jī)軸線垂直于卷筒軸線的電動(dòng)葫蘆采用蝸輪傳動(dòng)裝置。其缺點(diǎn)為：長(zhǎng)度尺寸大，寬度方面尺寸大，結(jié)構(gòu)粗笨，機(jī)械效率低，加工較難等。液壓系統(tǒng)為雙重控制，溢流調(diào)節(jié)閥、磁接點(diǎn)壓力表均可對(duì)壓力進(jìn)行精確的控制。電器控制部門采用了低電壓控制，增加了支配系統(tǒng)的安全性。

　　The electric hoist is a special lifting equipment, installed on the crown block and gantry crane. The electric hoist has the characteristics of small size, light weight, simple operation and convenient use, and is used in industrial and mining enterprises, warehouses, docks and other places.
　　The electric hoist has a compact structure. The electric hoist whose motor axis is perpendicular to the drum axis adopts worm gear transmission device. Its disadvantages are: large size in length, large size in width, bulky structure, low mechanical efficiency, and difficult processing. The hydraulic system is under dual control. The overflow regulating valve and magnetic contact pressure gauge can accurately control the pressure. The electrical control department adopts low voltage control, which increases the safety of the control system.