Crane and super-lifting and tensioning control system and method thereof

Abstract

The invention discloses a super-lifting and tensioning control system of a crane, comprising a tension device, a first detection device, a locking device and a control device, wherein, the tension device is used for tensioning a super-lifting device through a superlift winch; the first detection device is used for detecting the tensioning state of the tension device, and sending the obtained tensioning state signals; the locking device is used for locking the tension device; the control device is used for receiving the tensioning state signals and controlling the locking device according to the tensioning state signals; and the locking device comprises ratchet wheels coaxially and fixedly connected on the superlift winch, a track circumference of a groove of the ratchet wheel over against an axis, and an extension valve which can be connected in the groove in an insertion manner; when the tensioning state signals conforming to the preset value are received by the control device, a locking stop pin in the extension valve is commanded to extend out, and the superlift winch is commanded to stop operating after the locking stop pin extends out, and when the tensioning state signals conforming to the preset value are not received by the control device, the superlift winch is controlled to continuously operate.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a crane superlift tension control system, a crane including the crane superlift tension control system and a crane superlift tension control method. Background technique [0002] With the rapid development of my country's economic construction, the market demand for telescopic boom cranes, especially large-tonnage telescopic boom cranes, is increasing day by day. The construction site has higher and higher requirements for the total arm length, lifting height and lifting weight of telescopic boom cranes. Therefore, commonly used telescopic boom cranes are developing in the direction of large-scale, and large-scale is an important design of telescopic boom cranes. Target. [0003] Existing large-scale telescopic boom cranes generally include a basic boom and a telescopic boom that can extend from the basic boom. The total length of the basic boom is relatively long...

AI Technical Summary

Problems solved by technology

[0010] The locking device adopts the cooperative action of the lifting cylinder 01 and the locking cylinder 02 to complete the tensioning and locking of the super-lifting device. During the control process, it is necessary to detect the full extension and full retraction state of the two cylinders and the groove track detection of the ratchet 03, etc., and the detection signal There are many, the control is complicated, and it is prone to the situation that the half shaft 021 cannot be inserted into the groove of the ratchet 03 on the super-lift winch 04 during the operation

In addition, the flexible control of the existing locking device is relatively difficult. When the lifting cylinder 01 drives the locking cylinder 02 to retract, it will impact the ratchet wheel 03 on the winch

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