Pumping hydraulic system

Abstract

The invention discloses a pumping hydraulic system which comprises a hydraulic oil pump (1), an energy accumulator (5), a control valve (6) and operating cylinders (7), wherein the hydraulic oil pump is used for pumping hydraulic oil to the operating cylinders through a hydraulic cylinder telescopic control oil line, so as to push piston rods (73) of the operating cylinders to perform reciprocating motion; the energy accumulator is in hydraulic connection to the operating cylinders through the control valve; the control valve is used for controlling the energy accumulator to convey hydraulic oil to piston rod actuating chambers of the operating cylinders during the process of direction change of the piston rods when the piston rods perform reciprocating motion; so as to push the piston rods to change directions. According to the pumping hydraulic system provided by the invention, the energy accumulator and the control valve are adopted, so that the hydraulic oil can be conveyed to the piston rod actuating chambers timely with the help of release of pressure oil in the energy accumulator to push the piston rods to change direction rapidly and reduce response time t of direction change of the piston rods as far as possible, the continuity of concrete pumping is realized, the pumping efficiency is improved, meanwhile, the vibration amplitude of a placing boom is reduced, and the operating performance of concrete construction is improved.

Description

technical field [0001] The invention belongs to the technical field of concrete machinery, and in particular relates to a pumping hydraulic system capable of realizing quick start of oil cylinder reversing. Background technique [0002] Such as figure 1 and figure 2 Shown are hydraulic schematic diagrams of an open and closed pumping hydraulic system according to the prior art, respectively. Its working principle is: the hydraulic oil pump 1 provides hydraulic power for the system, the overflow valve 17 limits the maximum working pressure of the hydraulic system, and the hydraulic oil pump 1 pumps hydraulic oil to the working cylinder 7 through the common hydraulic cylinder telescopic control oil circuit to push the working cylinder 7 The piston rod 73 moves back and forth, and the piston rod 73 is connected to the concrete cylinder 8 and the hopper 9. The working cylinder 7 generally includes two connected cylinders. exist figure 2 and image 3 Among them, the teles...

AI Technical Summary

Problems solved by technology

The existence of the reversing response time t, especially if the reversing response time t is too long, will lead to the discontinuity of the concrete conveying process and affect the concrete conveying efficiency. The amplitude of up and down vibration in

but corresponds to figure 1 or figure 2 As far as the hydraulic schematic diagram is concerned, the length of the reversing response time t of the piston rod reversing mainly depends on the response time of the hydraulic oil pump 1 and the main oil circuit reversing valve 4, which is difficult

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