目前,我国金属矿山的井口设备中,手动控制还占有一定的比例,尤其是中小型矿山,摇台、托台、阻车器等,大部份属于手动,比较笨重。一些单位正力图用气动或电动来取而代之。气动推杆虽有不少优点,但投资大、消耗大、噪声大、冲击厉害,维修量大,容易失灵,效率也低。采用电动推杆,效率高。它是 At present, manual control still occupies a certain proportion in the wellhead equipment of metal mines in our country, especially for small and medium-sized mines, rockers, pallets and car stoppers. Most of them are manual and relatively heavy. Some units are trying to use pneumatic or electric to replace it. Although there are many advantages pneumatic pusher, but the investment, consumption, noise, impact, maintenance, easy to malfunction, low efficiency. Electric push rod, high efficiency. it is