A swing-motion conversion device of a tower crane stay rope, and a tower crane

Abstract

A swing-motion conversion device of a tower crane stay rope, and a tower crane are disclosed. The conversion device comprises an installation support, a detection assembly and a sleeve connecting rod. The detection assembly is fixed to the installation support and comprises a shell. The shell is provided with a first motion state sensor and a second motion state sensor which are perpendicular to each other and are disposed in the same horizontal plane. One end of the sleeve connecting rod is provided with a thrust bearing having a rope passing hole, and the other end of the sleeve connecting rod is separately connected to the first motion state sensor and the second motion state sensor. The tower crane comprises the swing-motion conversion device. According to the swing-motion conversion device and the tower crane, swing-motion conversion of the tower crane stay rope can be achieved, the swing quantity measurement problem during simple pendulum motion and conical pendulum motion of a hoisting stay rope is effectively overcome, detection of states comprising a swing angle, a swing speed, a swing accelerated speed, and the like of the swing motion of the stay rope can be achieved, measurement precision is high, and safety and reliability are good.

Description

technical field [0001] The invention relates to the technical field of crane rope stability control, in particular to a crane rope swing motion conversion device and a crane. Background technique [0002] There are many kinds of cranes, such as truck cranes, crawler cranes, tower cranes, port cranes (tire type, portal type, portal type, bridge type), etc. They have main mechanisms such as lifting, walking, and slewing, relying on the lifting mechanism And the wire rope provides enough moment to lift and carry the goods. [0003] With the development of large-scale cranes, the running speed and lifting height of cranes and trolleys have also increased accordingly. Due to the increase in lifting height, the length of the wire rope and the sight distance of the operator have continued to increase. The speed of operation increases, so that more and more time is spent on eliminating the swing of the spreader (cargo) and accurately placing the goods. How to realize the stability...

AI Technical Summary

Problems solved by technology

There are disadvantages and limitations in using this technology for anti-rolling: ①This detection is only limited to the direction of the trolley, and there is no anti-rolling in the direction of the large vehicle

②This kind of anti-sway is an electronic anti-sway, and the actual application will cause discomfort to the operator

③ Due to the use of laser (infrared) detection, it is greatly affected and interfered by the external environment

There are also some problems: ① high-precision inertial measurement units are currently mainly used in military and aerospace applications, and foreign countries have technology blockades on my country, and the price is high

② The inclination sensor is cheap, but its measurement principle determines that its measurement accuracy is low, and the output value is not accurate due to the influence of centripetal force

③The motion state of the steel wire rope of the single jib crane is relatively complicated, and there are many factors that affect the accuracy of the measured value, especially when the spreader (cargo) rotates by itself and the wire rope produces twisting motion, it cannot be measured

①This method requires a set of special anti-rolling mechanism, which increases the weight of the trolley, and the cost is relatively high

② Due to the use of cable-stayed anti-rolling wire ropes, it is necessary to ensure that the entire mechanism has a sufficient cable-stay angle, and the scope of application is limited

[0008] The application technology of crane wire rope anti-sway, as well as mechanical anti-sway device, hydraulic anti-sway device, eight-rope two-way anti-sway technology, etc., but these technologies have many shortcomings, such as high cost, heavy anti-sway device, failure rate High, inconvenient maintenance, affecting the service life of the wire rope, etc.

Therefore, for single jib cranes, how to realize the conversion detection of crane wire rope sway motion, there is no mature application of wire rope sway motion detection and sway prevention at present, and it has become a key technical problem to be solved urgently

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