Concrete pump truck is a machine that uses pressure to continuously transport concrete along the pipeline. It consists of pump body and delivery pipe. This article focuses on the composition and performance of concrete pump trucks.
1. Composition of concrete pump truck
It consists of five parts: boom, pumping, hydraulic pressure, support, and electronic control
2. Performance of concrete pump truck
The control methods of the electrical control system of the concrete pump truck are mainly five types of mechanical, hydraulic, electromechanical electrical control, programmable controller, and logic circuit control. In addition to installing an electrical control system to complete the control tasks, the concrete pump truck is also equipped with a manual control operating system, which is also part of the control system.
If mechanical control is adopted, there are generally two ways of the rod-type operating mechanism and the flexible shaft operating mechanism. If you compare the two, 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 and less empty stroke, convenient stroke adjustment, etc., so the control system of the concrete pump truck Mainly choose the flexible shaft control mechanism.
According to the 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, the disc spring can be used. Or spring plate. In order to facilitate operation, the joysticks are designed to be installed in more convenient positions. For example, Putzmeister BSF36.09Z pump truck, the joystick for controlling the engine speed is installed on the side of the ladder, and the operation is very convenient. The control system of the concrete pump truck is mainly used to control the flow of the main hydraulic pump and the engine speed, thereby changing the concrete discharge of the pump truck. If hydraulic operation is adopted, the hydraulic driving force can be directly obtained from the pumping system of the pump truck, and the operation can be realized through a manual hydraulic valve. There is 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 and eliminate the fault in time to improve the 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 must be cleaned. When washing, put the cylindrical cement bag and cleaning ball soaked in water into the cleaned conical tube, connect the conical tube and pipeline, close the discharge door, and fill the hopper with water (must be kept Constant water supply). Pump water until the cleaning ball emerges from the front end of the delivery tube. Air washing is compressed air blowing. The cleaning ball soaked in water is first plugged into the inlet washing joint, then the first straight pipe connected to the reducing pipe is connected, and a safety cover is connected to the end of the pipe. The orifice should face down. Control the pressure of compressed air not to exceed 0.8MPa, the air valve should be opened slowly, and the atmospheric valve should be opened when the concrete can flow out smoothly.
