How to control the pumping displacement of truck mounted concrete pump

Adjusting the pumping speed according to different construction conditions is of great significance in the actual operation process. In order to change the pumping displacement of truck mounted concrete pump. The following methods are usually used:

1. Mechanical adjustment. The pumping displacement is changed by changing the size of the throttle opening manually. The advantage is low cost, the disadvantage is that it must be manually adjusted on the vehicle, and the use of the remote control for moving away from the concrete pump truck is very inconvenient and the adjustment precision is low.

2. Engine speed adjustment. Adjust the engine speed to change the displacement of the main pump, resulting in changes in pumping speed, to achieve pumping displacement control. The change in engine speed also changes the speed of the boom, which may become an irreconcilable contradiction during construction.

3. Electronic control proportional valve adjustment. Electronic control proportional valve adjustment according to the different electronic control methods are divided into the following two ways: 1, wireless remote control output PWM signal directly drives displacement control proportional valve so as to realize the stepless speed regulation of the pumping displacement, which overcomes the problem that the mechanical adjustment mode cannot realize the remote control. The disadvantage is that once the remote controller fails, the pumping displacement adjustment cannot be realized in the control panel. 2. The proportional amplification board outputs the PWM signal to drive the displacement control proportional valve through the (remote control/panel control) changeover switch, which can conveniently realize the adjustment of the input end of the wireless remote control or control panel to the proportional amplification board, so that the proportional amplification board outputs 200-600 MA PWM signal to drive the displacement control proportional valve. In summary, the proportional amplification board outputs a PWM signal to drive the displacement control proportional valve to change the pumping displacement mode, which not only overcomes the shortcomings of the mechanical inconvenience adjustment, but also flexibly realizes the connection between the wireless remote controller and the control panel. The conversion control realizes the stepless speed regulation of the pumping displacement, which is more in line with the actual construction requirements.