Upper control system

小型混凝土搅拌车搅拌筒调速操纵杆的操纵应轻便灵活，应设置锁紧装置（或定位装置）。在手柄附近可视处应装有手柄位置指示牌，标明进料、搅动和出料时手柄的方向。

The operation of the speed control lever of the mixing drum of the small concrete mixer shall be light and flexible, and a locking device (or positioning device) shall be set. A handle position indicator shall be installed at the visible place near the handle to indicate the direction of the handle during feeding, stirring and discharging.

液压系统

Hydraulic system

液压管路应排列整齐、牢固、合理，各元件应装拆方便，便于维修。液压系统液压油的固体污染度限值应符合QC/T29104的规定。小型混凝土搅拌车工作中，液压系统液压油的温升不得超过40℃，较高温度不得超过80℃。

The hydraulic pipeline shall be arranged neatly, firmly and reasonably, and each element shall be installed and disassembled conveniently for maintenance. The solid pollution limit of hydraulic oil of hydraulic system shall comply with the provisions of QC / t29104. During the operation of small concrete mixer, the temperature rise of hydraulic oil in hydraulic system shall not exceed 40 ℃, and the higher temperature shall not exceed 80 ℃.

供水系统

Water supply system

供搅拌筒清洗用的水箱中水的容量不得小于600L，水的流量不应小于45L/min。压力水箱须配备减压阀，保障水箱中的压力不大于0.6MPa。小型混凝土搅拌车水箱应设置清晰的水位计（管），并能使操纵者容易看清水箱中的水位。

The capacity of water in the water tank for mixing drum cleaning shall not be less than 600L, and the water flow shall not be less than 45L / min. The pressure water tank must be equipped with a pressure reducing valve to ensure that the pressure in the water tank is not greater than 0.6MPa. Clear water level gauge (pipe) shall be set in the water tank of small concrete mixer truck, and the operator can easily see the water level in the water tank.

电气系统

electrical system

运输车照明、信号装置应符合GB4785的规定。在进料斗附近应设置工作尾灯。单独柴油机取力的运输车，装设的柴油机起动电路，其电压和电流额定值应符合柴油机的有关规定。小型混凝土搅拌车专用装置平均无故障工作时间（Tb）不小于100h，可靠度(R)不小于80%。

The lighting and signal devices of transport vehicles shall comply with the provisions of gb4785. A working tail light shall be set near the feed hopper. The voltage and current rating of the diesel engine starting circuit installed on the transport vehicle powered by a separate diesel engine shall comply with the relevant provisions of the diesel engine. The mean time between failures (TB) of special equipment for small concrete mixer shall not be less than 100h, and the reliability (R) shall not be less than 80%.

搅拌筒

Mixing drum

搅拌筒应设置1～2个能快速打开的入口，孔径不小于450mm，在椭圆形孔的情况下，其短径应不小于350mm，关闭时密封良好。搅拌筒在各种规定的使用状态下，应转动平稳，不得有打颤和振动现象。搅拌叶片与筒体应焊接牢固，螺旋曲线应连接。不应有明显拐点。

The mixing drum shall be provided with 1 ~ 2 inlets that can be opened quickly, with the hole diameter not less than 450mm. In the case of oval hole, its short diameter shall not be less than 350mm, and it shall be well sealed when closed. The mixing drum shall rotate stably without chattering and vibration under various specified service conditions. The mixing blade and the cylinder shall be firmly welded, and the spiral curve shall be connected. There should be no obvious inflection point.

出料溜槽

Discharge chute

出料溜槽应能在水平面内转动180°，以适应不同的卸料位置，在垂直面内应能调节与水平方向的倾斜角，以适应不同的卸料高度。出料溜槽应设置加长溜槽，其装拆应方便，出料溜槽与加长溜槽的总长不应超过3.5m。出料溜槽与加长溜槽连接后应形成圆滑的连接通道，不得阻碍混凝土的卸料。出料溜槽应设置锁紧机构，在小型混凝土搅拌车行驶时，应将出料溜槽固定、锁紧。

The discharge chute shall be able to rotate 180 ° in the horizontal plane to adapt to different unloading positions, and the inclination angle with the horizontal direction shall be adjusted in the vertical plane to adapt to different unloading heights. The discharge chute shall be provided with an extended chute, which shall be easy to assemble and disassemble. The total length of the discharge chute and the extended chute shall not exceed 3.5m. After the discharge chute is connected with the extended chute, a smooth connection channel shall be formed, which shall not hinder the unloading of concrete. The discharge chute shall be provided with a locking mechanism. When the small concrete mixer is running, the discharge chute shall be fixed and locked.