There are five main control methods for the electrical control system of the concrete pump truck: mechanical, hydraulic, electromechanical electrical control, programmable controller, and logic circuit control. In addition to the electrical control system installed on the concrete pump truck to complete the control task, a manual control operation system is also installed, which is also a part of the control system. If mechanical control is used, there are generally two ways of lever system control mechanism and flexible shaft control mechanism. If the two are compared, it is not difficult to find that the flexible shaft control mechanism has more advantages, such as flexible layout, high transmission efficiency, less transition joints, small empty stroke, and convenient stroke adjustment. Therefore, the control system of the concrete pump truck The main thing is to choose the flexible shaft control mechanism. According to actual needs, the control system of the pump truck should be able to realize stepless speed regulation, and the locking mechanism that can stop the joystick at any position is the key device to realize the stepless speed regulation. Generally, a disc spring can be used. or spring plate etc. For ease of operation, the joysticks are designed to be installed in more convenient positions, such as Putzmeister BSF36.09Z pump truck, the joystick for controlling the engine speed is installed on the side of the ladder, which is very convenient to operate. The control system of the concrete pump truck is mainly used to control the flow rate of the main hydraulic pump and the speed of the engine, thereby changing the concrete discharge volume of the pump truck. If hydraulic control is used, the hydraulic driving force can be obtained directly from the pumping system of the pump truck, and the control can be realized through the manual hydraulic valve. It has an inseparable relationship with the performance of concrete. At the same time, pay attention to the details of the operating procedures during the operation, and find out and troubleshoot in time to improve the working efficiency of the pump. There are two methods for pipe cleaning: water washing and air washing. Whether it is water washing or air washing, the valve box and hopper should be cleaned. When washing with water, put the water-soaked cement bag and cleaning ball into the cleaned conical pipe successively, connect the conical pipe and pipe, close the discharge door, and then fill the hopper with water (must be kept). continuous water supply). Pump water until the wash ball emerges from the front end of the delivery tube. Air washing is compressed air purging, which is to plug the water-soaked cleaning ball into the air-washing joint first, then connect the first straight pipe connected to the reducing pipe, and connect a safety cover to the end of the pipe. The orifice should be facing down. Control the pressure of the compressed air not to exceed 0.8MPa, the air valve should be opened slowly, and the air valve should be opened only when the concrete can flow out smoothly.