Do you know the method of concrete pump pumping displacement adjustment? 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, the following methods are usually used, as follows:
First, mechanical adjustment
By changing the size of the throttle opening manually, the pump displacement can be changed. The advantage is that the cost is low, and the disadvantage is that it must be adjusted manually on the vehicle. For remote operation away from the pump truck, it causes great inconvenience and the adjustment accuracy is low.
Second, engine speed adjustment
Adjust the engine speed to change the displacement of the main pump, resulting in changes in the pumping speed and achieving pumping displacement control. The change of the engine speed also changes the moving speed of the boom, which may become an irreconcilable contradiction in the construction.
Do you know the method of concrete pump pumping displacement adjustment?
Three, electronically controlled proportional valve adjustment
Electronically controlled proportional valve adjustment is divided into the following two ways according to the different electronic control methods:
1.Wireless remote control output PWM signal directly drives displacement control proportional valve
The wireless remote controller outputs a 200-600mA PWM signal to directly drive the displacement control proportional valve to achieve stepless speed regulation of the pumping displacement, which overcomes the problem that mechanical adjustment cannot achieve remote control. Pumping displacement cannot be adjusted at the control panel.
2.The proportional amplification board outputs a PWM signal to drive the displacement control proportional valve
Through the (remote control / panel control) switch, you can easily adjust the input terminal of the proportional amplifier board by the wireless remote control or control panel, so that the proportional amplifier board outputs a 200-600mA PWM signal to drive the displacement control proportional valve.
In summary, the method of changing the pumping displacement by the displacement control proportional valve driven by the proportional amplification board output PWM signal not only overcomes the shortcomings of inconvenient adjustment by mechanical methods, but also can flexibly implement the communication between the wireless remote control and the control panel. Switching control to achieve stepless speed regulation of pumping displacement, more in line with the requirements of actual construction.