Tunnel concrete pumping pressure compensation method and concrete pump

Abstract

The present application belongs to the technical field of pumping control, and specifically relates to a tunnel concrete pumping pressure compensation method and a concrete pump. The method is characterized in that the pressure, flow rate and pipe wall vibration signals of multiple detection points of a pumping main pipeline are correlated and analyzed to identify the overlapping pipe section of the pressure rising area, the flow rate attenuation area and the vibration abnormal area in space as a candidate backflow inducing section, thereby effectively distinguishing normal pumping fluctuations from backflow abnormalities. The target backflow inducing section is determined based on the timing of the pressure peak value, the timing of the flow rate attenuation and the pipe wall vibration signal. The buffer pressure release amount and the segmented pressure compensation amount are determined according to the pressure deviation upstream of the target backflow inducing section, the flow rate deviation at the end of the pumping main pipeline and the pressure attenuation degree of each pressure compensation section, so that backflow suppression and energy compensation are coordinated, and the lack of adjustment or energy waste caused by single adjustment is avoided. The buffer pressure release amount and the segmented pressure compensation amount are adjusted to adaptively correct, thereby preventing overcompensation and undercompensation.

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