Concrete pumping equipment, stroke control system, method and device of serial cylinders

Abstract

The invention discloses a stroke control system, method and device of series oil cylinders, wherein a working condition collection device is used to collect pressure and displacement gears of a pumping hydraulic system; a stroke collection device is used to collect stroke states of two series oil cylinders ; Supplement and drain hydraulic system is used to supplement or drain oil in the communication cavity of two serial oil cylinders; the controller includes a preset stroke data module, which contains the pumping hydraulic system at different pressures and displacements Under the gear position, when the two serial oil cylinders have the stroke state in place, the oil replenishment and drain hydraulic system needs to replenish and drain the oil in the communication chamber; the controller is used to judge the communication chamber according to the stroke status of the two serial oil cylinders collected by the stroke acquisition device Whether it is necessary to replenish oil or drain oil, and select the corresponding oil replenishment and drain time from the stroke data module according to the pressure and displacement gear of the pumping hydraulic system collected by the working condition acquisition device, and control the oil replenishment and drain hydraulic system to carry out Make up drain operation.

Description

technical field [0001] The invention relates to the field of concrete pumping, in particular to a stroke control system, method and device for serial oil cylinders applied to concrete pumping equipment. Background technique [0002] The concrete pump realizes the continuous pumping of concrete through the reciprocating motion of two oil cylinders in series. The cylinder bores and rod diameters of the two series cylinders are the same, theoretically they can keep moving synchronously. However, due to manufacturing accuracy, load, leakage and other reasons, the two oil cylinders will be out of sync, and with the accumulation of time, the synchronization error will gradually increase. If there is no control device, it will increase to the point that the system cannot work normally. [0003] The pressure relief type buffer mechanism is generally used on concrete pumps to adjust the stroke of two series cylinders. Such as figure 1 As shown, the rodless chamber 123 of the first...

AI Technical Summary

Problems solved by technology

[0007] However, in this stroke control device, the power-on or power-off time of each adjustment of the initial state of the supplementary and drain solenoid valve is t, and the control method is not flexible; in addition, under different working conditions, the oil cylinder communication chamber There is a big difference between the replenishment and discharge of oil, which leads to the fact that under certain working conditions, the above-mentioned gradually approaching adjustment period will be very long, and even cannot be adjusted within a very long adjustment period, that is, "oil replenishment and draining" occurs. timeout failure"

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