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Tower crane and hoisting safety control method, device and system thereof

A safety control and tower crane technology, applied in the direction of cranes, etc., can solve problems such as boom deformation, casualties, signal interference, etc., and achieve the effect of avoiding hook top-rushing accidents.

Active Publication Date: 2015-11-18
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual operation, due to the failure of the mechanical height limiter, signal interference, short-circuiting and dismantling, the hook often rushes to the top, resulting in wire rope breakage, trolley damage, boom deformation and hook falling off. Accidents, causing heavy property damage and casualties

Method used

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  • Tower crane and hoisting safety control method, device and system thereof
  • Tower crane and hoisting safety control method, device and system thereof
  • Tower crane and hoisting safety control method, device and system thereof

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Embodiment Construction

[0019] To enable those skilled in the art to understand the present invention more clearly, a more detailed description will be given below in conjunction with the accompanying drawings, but these descriptions are not used to limit the protection scope of the present invention.

[0020] The invention adopts an analog signal output height limiter. The controller collects and processes the analog signal output by the height limiter, and the analog signal has stability and anti-interference ability. The analog detection signal of the height limiter is a linear change area (such as 0-5V). When the hoisting drum rewinds and unwinds the wire rope, it will drive the height limiter to work. The height limiter controls the position and number of turns of the drum. Detect and output the changed analog signal.

[0021] Such as figure 1 As shown, it is a flowchart of a tower crane lifting safety control method in an embodiment of the present invention. After the tower crane is started, it rec...

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PUM

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Abstract

The invention discloses a tower crane, as well as a hoisting safety control method, equipment and system thereof. The method comprises the following steps: receiving a tower crane hoisting gear signal and an analog quantity signal of a height limitator; judging that the height limitator works normally if the analog quantity signal of the height limitator changes in a preset time after the tower crane hoisting gear signal is received, so as to control a tower crane hoisting mechanism to continue working normally; judging that the height limitator works abnormally if the analog quantity signal of the height limitator does not change in the preset time after the tower crane hoisting gear signal is received, so as to control the tower crane hoisting mechanism to stop working. According to the invention, due to the adoption of the height limitator outputting the analog quantity signal, lifting hook rushing to top accidents caused by failure of the limitator can be avoided.

Description

Technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a tower crane and its lifting safety control method, equipment and system. Background technique [0002] Currently, in the tower crane lifting control system, mechanical height limiters are mainly used to set limit points to limit the lifting height of the hook. In actual operation, the hook topping phenomenon often occurs due to the failure of the mechanical height limiter, signal interference, short-circuiting and removal, causing the wire rope to break, the trolley is damaged, the boom is deformed, and the hook falls off. The accident caused heavy property losses and casualties. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a tower crane and its lifting safety control method, equipment and system in view of the defects of the prior art, which has the function of preventing failure of the stopper and fully g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/90
Inventor 衣磊
Owner ZOOMLION HEAVY IND CO LTD
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