Concrete pump truck and vibration damping method for boom end of concrete pump truck

Abstract

The invention discloses concrete pumping equipment and an arm rest tail end vibration reduction method for a concrete pump truck. The concrete pumping equipment comprises a concrete conveying pipe and a gas charging system. The gas charging system comprises a pressure gas source (1) and a gas charging pipeline (2), the gas charging pipeline is connected with the pressure gas source and the concrete conveying pipe so as to charge pressure gas into a pipe cavity of the concrete conveying pipe. The pressure gas is creatively charged into the concrete conveying pipe through the gas charging system which is additionally arranged, so that the continuous gas is charged into the discontinuous size of concrete which is pumped discontinuously, and pumped media flow continuously; thus, pumping impact is reduced radically, and the purpose of reducing the tail end vibration of an arm rest is achieved; in addition, the pressure gas is charged, so that multiphase flows are formed inside the concrete conveying pipe, internal energy consumption among the multiphase flows is increased, and vibration is also relieved radically. Therefore, in the construction process of the concrete pump truck, the arm rest tail end displacement vibration can be reduced initiatively, and the construction stability of the concrete pump truck is improved.

Description

Technical field [0001] The invention relates to the field of concrete pumping, in particular to a pumping equipment and a vibration reduction method thereof. Background technique [0002] Usually the concrete pump truck pumps concrete through the discontinuous intermittent action of double cylinders. Due to the discontinuity of concrete transportation, very large vibrations will be generated at the end of the boom end of the concrete delivery pipe (ie hose), resulting in the boom Fatigue, inaccurate end positioning, difficult pouring operation, and also increase the risk of operation. [0003] Various methods have been adopted in the prior art to relieve the vibration at the end of the boom caused by concrete transportation. For example, in the patent application with the publication number CN1932215A, a vibration suppression oil cylinder is used. Among them, the boom cylinder is connected with the vibration suppression cylinder, the pressure detection unit detects the pressure i...

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Problems solved by technology

[0005] However, the above-mentioned anti-vibration measures have many shortcomings.

In the way of using the anti-vibration cylinder, the vibration caused by the discontinuous concrete impact on the boom of the pump truck during the construction process is unpredictable, and the vibration caused by the pulsating vibration generated by the anti-vibration oil cylinder to the end of the boom with different attitudes is also difficult. Accurate control, so it is difficult to obtain the ideal control effect by using two unpredictable quantities as the control basis, and the method of increasing the pulse vibration with opposite phase will inevitably increase the stress of the boom system and reduce the service life of the boom

In the method of controlling the piston of the boom cylinder through the vibration detection unit, the boom attitude and the vibration data of the boom end monitored by the monitoring unit in real time are used as control signals, the control algorithm is complex, the control parameters of different attitudes are ever-changing, and the control robustness is relatively low. Difference

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