Hydraulic synchronous independent control device, synchronous hydraulic system and crane

Abstract

The invention discloses a hydraulic synchronous independent control device. The device is provided with a first oil inlet, a second oil inlet, a first oil outlet, a second oil outlet, an oil drainage outlet, a first hydraulic control one-way valve, a second hydraulic control one-way valve, a first reversing valve, a second reversing valve, a first one-way valve and a second one-way valve, wherein the first oil inlet is communicated with the first oil outlet; and the second oil inlet is communicated with the second oil outlet. With the adoption of the first reversing valve and the second reversing valve, the device can independently control the first oil outlet and the second oil outlet as required, so that the synchronous errors can be manually removed, the system can be prevented form suppressing pressure and overflowing, and can be applied to other synchronous components other than flow distributing and collecting valves. The invention also discloses a hydraulic synchronous system and a crane which are provided with the control device.

Description

technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a hydraulic synchronous independent control device for a crane. The invention also relates to a synchronous hydraulic system and a crane provided with said control device. Background technique [0002] On modern lifting machinery, due to design requirements, its hydraulic system will use a double-cylinder structure to provide power. However, during the use of the double cylinders, if the load forces they bear are not equal, there will be a phenomenon of asynchronous lifting or falling. [0003] For example, with the continuous increase of the lifting capacity of large-tonnage cranes, the weight and quantity of counterweights are also increasing. In order to ensure that the counterweight can be lifted and can be lifted smoothly, the counterweight set on the large-tonnage crane The number of oil cylinders is two and installed symmetrically. [0004] The use of double c...

AI Technical Summary

Problems solved by technology

[0009] Although this technical solution can achieve manual elimination of synchronization errors, when the individual control is performed, the oil intake of the other oil circuit is very small, and the system will overflow with pressure, thereby reducing the system efficiency and causing the system to heat up

[0010] In addition, this technical solution cannot be generally applied to other synchronous components. For example, the diverting and converging valve 10' cannot be used after being replaced with a synchronous motor, which limits the scope of application.

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