Anti-sway device for pull-down crane

Abstract

The invention discloses a pull-down type crane shaking preventive device which comprises a pulling rope mechanism, a loading rope mechanism, towing rope mechanisms, a rotary drum device, a pulling block and loading pulleys. The rotary drum device is arranged on a crane foundation pillar, the loading rope mechanism comprises a loading rope tail end fixed pulley, a loading rope driving device and aloading rope, the towing rope mechanisms comprise towing rope driving devices, wing-shaped support frames, rotary drum driving devices, towing ropes and towing rope fixed pulleys, the locations of heavy objects in spaces are jointly controlled by the pulling rope mechanism, the loading rope mechanism and the towing rope mechanisms, and shaking of the heavy objects can be synchronously restrained by a single towing rope actuator and two towing rope actuators on the wing-shaped support frames. The pull-down type crane shaking preventive device has the advantages that the pull-down type crane shaking preventive device is high in load and wide in hoisting space domain, effects of quickly reducing shaking of the hoisted heavy objects along the directions perpendicular to a suspension arm and along the direction of the suspension arm to a great extent can be realized by the pull-down type crane shaking preventive device, and requirements of narrow and long goods placing environments can be met.

Description

technical field [0001] The invention relates to a marine crane, in particular to an anti-sway device for a pull-down crane. Background technique [0002] The marine crane can realize the transfer of goods between ships, and is an important equipment to improve my country's maritime material security and transportation capabilities. Affected by sea waves and sea wind, the hull itself undergoes six-dimensional motions such as rolling and pitching. The disturbance of the cargo by the characteristic wind force causes the cargo under the flexible rope of the crane to sway in space due to inertia, and this phenomenon is particularly prominent when the sea condition deteriorates. Therefore, it is urgent to transform or improve the anti-sway technology of the traditional crane. The existing technology is still unable to propose a better electric solution for the anti-sway modification of the ship crane. Patent US6439407B1 proposes to use a single slider for lifting, and add two a...

AI Technical Summary

Problems solved by technology

The existing technology is still unable to propose a better electric solution for the anti-sway modification of the ship crane

Patent US6439407B1 proposes to use a single slider for lifting, and add two anti-sway ropes on the side of the slider, and then connect the weight to the bottom of the slider through a six-degree-of-freedom parallel rope mechanism. The disadvantage is that the part that needs to be controlled Too many, and the six-degree-of-freedom parallel rope pull mechanism itself requires a certain amount of space

Patent EP2526042B1 proposes a crane that can prevent shaking along the direction of the boom and its vertical direction. Its disadvantage is that the lifting part cannot adapt to the narrow cargo storage environment; patent CN201621218272. The disadvantage is that the weight and force arm of the support arm at the end of the multi-stage movable arm are too large, occupying space, and can only prevent shaking in a single dimension

Patent CN105621275A proposes a crane using a parallel mechanism to prevent shaking. It adds a three-branch parallel mechanism under the crane. The disadvantage is that the gravity of the crane is too large, and the output requirements for the parallel mechanism are relatively high.

Patent US7367464B1, this patent proposes a crane that uses two rotating beams to control and restrain heavy objects from shaking in the direction of the boom. The disadvantage is that it can only prevent shaking in one dimension

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