A kind of crane and its counterweight control device and counterweight control method

Abstract

The invention discloses a balance weight control device for a crane. The balance weight control device comprises a gear switch with multiple speed gears, a detecting element and a control element, wherein the detecting element is used for detecting the speed gears of the gear switch; the control element is used for receiving control signals of the speed gears and controlling the revolving speed of an engine of the crane according to the speed gears of the gear switch so as to control the flow of a pump, thus controlling the flexible speeds of balance weight oil cylinders. Therefore, the flexible speeds of the balance weight oil cylinders are controlled through the speed gears of the gear switch in a balance weight lifting process, the two-side balance weight oil cylinders can operate at the same speed, the overlarge operation speed difference of the two-side balance weight oil cylinders is avoided, the synchronous telescope of the two-side balance weight oil cylinders is realized, the synchronism of the two-side balance weight oil cylinders is guaranteed, and the hooking reliability of the balance weight is improved. The invention also provides the crane comprising the balance weight control device and a balance weight control method based on the balance weight control device.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a counterweight control device for a crane. The present invention also relates to a crane including the above-mentioned counterweight control device, and a counterweight control method based on the above-mentioned counterweight control device. Background technique [0002] With the rapid development of my country's economic construction, construction machinery, especially cranes, are more and more widely used in various fields of economic construction. [0003] During the working process of the crane, in order to ensure the balance of the crane and avoid overturning, it is necessary to mount a counterweight on the crane. Large-tonnage cranes have more counterweights, which are usually removed from the machine body during the transfer process and transported separately. After arriving at the work site, they are then mounted on the turntable of the crane according to...

AI Technical Summary

Problems solved by technology

[0005] However, in the actual working process, because the counterweight is controlled by the double-sided counterweight oil cylinder, the existing counterweight control device can only control the extension and retraction of the two counterweight oil cylinders, while the counterweight oil cylinders on both sides The telescopic speed cannot be controlled. When one side of the cylinder runs at a low speed, the other side may run at a high speed, which makes it difficult to ensure the synchronization of the counterweight cylinders on both sides and reduces the reliability of the counterweight connection.

Images