Hydraulic interlocking control loop

Abstract

The invention discloses a hydraulic interlocking control loop which comprises a first hydraulic loop, a second hydraulic loop and a reversing valve III for simultaneously controlling hydraulic locks in the first hydraulic loop and the second hydraulic loop. A left oil outlet A of the reversing valve III is connected with control oil ports x of the hydraulic lock Ia and the hydraulic lock Ib in the first hydraulic loop and leakage oil ports y of the hydraulic lock IIa and the hydraulic lock IIb in the second hydraulic loop, and a right oil outlet B of the reversing valve III is connected with leakage oil ports y of the hydraulic lock Ia and the hydraulic lock Ib in the first hydraulic loop and control oil ports x of the hydraulic lock IIa and the hydraulic lock IIb in the second hydraulic loop. The interlocking function of the two hydraulic loops is achieved through a set of reversing valves, the problems of equipment damage and even personal injuries caused by electrical interlocking failure are effectively solved, and control risks are reduced. The number of the reversing valves needed in the loops is reduced, manufacturing cost is saved, the number of hidden troubles of oil leakage points is reduced, and the reliability of a system is improved.

Description

technical field [0001] The invention belongs to the field of hydraulic circuits, and in particular relates to a hydraulic control circuit with an interlock function. Background technique [0002] When the two mechanisms of the mechanical equipment cannot operate at the same time, they need to be realized through the interlock function. The existing interlock functions are mostly controlled by electricity. Even if the two mechanisms are controlled by hydraulic circuits, the interlock function is still controlled by electricity. Valve way to achieve. [0003] The hydraulic circuit control principle commonly used in the prior art is as follows: figure 1 As shown: oil cylinder 1 is connected with hydraulic locks 2, 3 and reversing valve 4, and oil cylinder 5 is connected with hydraulic locks 6, 7 and reversing valve 8. In order to realize the interlock function, reversing valve 9 and reversing valve are also provided in the control circuit. A reversing valve 10, wherein the re...

AI Technical Summary

Problems solved by technology

[0006] This kind of hydraulic circuit mainly has the following problems: it is necessary to use electrical interlock to ensure the action requirements of the hydraulic circuit, and the risk of control increases. Personal injury; In addition, because two reversing valves are required in this circuit to control the hydraulic locks in their respective circuits, it not only increases the manufacturing cost, but also increases the number of hidden dangers of oil leakage points, thereby reducing the reliability of the circuit

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