Which problems should notice about construction engineering homework in concrete mixer?

Which problems should notice about construction engineering homework in concrete mixer? Firstly, the concrete mixer belt, belt machine should start under load before working, the staff is not allowed close to when the belt running time, especially in the concrete mixer feeding time, but perhaps not to allow the head and hand into view between the hopper and the frame, the work can not be hand or an object and other objects inserted into the cylinder Grilled stirred material discharged.Secondly,to add fresh material must first post all the original concrete unloading. You must not stop halfway or start from scratch mixer at the Netherlands, including those who swing the material.If there are a few problems,should immediately press the emergency stop button SB, cut off power supply,the concrete should be fully discharged in 45 minutes. And clean up the inner wall of the barrel.Finally,in the crushing operation process, prohibit halfway down, such as when there is a power outage scene mission, should immediately open the unloading door, put the debris in the mix to make the mixing tube to avoid condensation.