为便于斗车的操作,我们在长途斗车平台车架一侧,装了三位脚踏顺序阀,以控制前后两个平台的升降。三位脚踏顺序阀(见图1)为一圆柱阀,阀芯中心进风,柱面分为三等份,分别有两个高压风孔通向前后两个升降气缸,使平台升起。余风则由回风道排空,平台落下(见图2)。 In order to facilitate the operation of the truck, we installed a three-position sequence valve on the side of the platform frame of the long-distance truck to control the elevation of the two platforms. Three-pedal sequence valve (see Figure 1) is a cylindrical valve, the center of the valve into the wind, the cylinder is divided into three equal parts, respectively, two high-pressure air holes leading to the front and rear lifting cylinder so that the platform rises. The remaining wind is emptied from the return duct, the platform falls (see Figure 2).