Oil cylinder control system, control method and pumping machinery

Abstract

An oil cylinder control system and control method, and a pumping machine; the oil cylinder control system is provided with a closed oil pump (3), a reversing valve group, a rotation speed detection element (5), a displacement detection unit, a location monitoring element, and a control unit (9); the rotation speed detection element (5) is configured to obtain a rotation speed of the closed oil pump and generate a rotation speed signal; the displacement detection unit is configured to obtain the displacement of the closed oil pump and generate a displacement signal; the location monitoring element is configured to generate an in-place signal when a piston of a main oil cylinder reaches a preset location; and the control unit (9) is configured to control, according to the rotation speed signal, the displacement signal, and the in-place signal, the reversing valve group to reverse a servo oil cylinder (31). In the oil cylinder control system, it is not required to arrange a long induction sleeve on a piston rod to obtain a moving speed of the piston. Therefore, in a case of keeping the length of the main oil cylinder, an effective stroke of the main oil cylinder can be extended; or in a case of keeping a current stroke of the main oil cylinder, the length of the main oil cylinder can be shortened.

Description

technical field [0001] The invention relates to hydraulic control technology, in particular to an oil cylinder control system and a control method; in addition, the invention also relates to a pumping machine with the above oil cylinder control system. Background technique [0002] At present, pumping machinery (such as pump trucks, vehicle-mounted pumps, etc.) has been widely used in engineering construction; among these pumping machinery, the core mechanism is the pumping system. Such as figure 1 As shown, the pumping system usually includes a main oil cylinder 1, a delivery cylinder 2, a concrete piston 3 and a water tank 4, the concrete piston 3 is slidably arranged in the delivery cylinder 2, and the piston rod 6 of the main oil cylinder 1 is connected to the concrete piston 3; the pumping system The working principle is: when the piston rod 6 is retracted, the delivery cylinder 2 sucks the material from the port 8; when the piston rod 6 is extended, the delivery cylin...

AI Technical Summary

Problems solved by technology

[0005] Although the above method can realize the reversing of the main cylinder 1, it needs to install a long induction sleeve on the piston rod, otherwise the movement speed of the piston 5 cannot be calculated, which will lead to The effective stroke of the main oil cylinder is reduced; while maintaining the original stroke of the main oil cylinder, the total length of the main oil cylinder must be increased, which will increase the weight of the main oil cylinder and make installation difficult

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