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Tower crane anti-drop arm monitoring device, method and tower crane

A monitoring device and tower crane technology, applied in cranes and other directions, can solve problems such as failure to detect falling arms in time, safety accidents, etc., and achieve the effects of simple structure, avoidance of safety accidents, and cost generation.

Active Publication Date: 2016-03-23
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a tower crane anti-falling arm monitoring device, method and tower crane to solve the problem that the prior art cannot detect the falling arm in time and cause safety accidents

Method used

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  • Tower crane anti-drop arm monitoring device, method and tower crane
  • Tower crane anti-drop arm monitoring device, method and tower crane
  • Tower crane anti-drop arm monitoring device, method and tower crane

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Embodiment Construction

[0022] Embodiments of the invention are described in detail below, but the invention can be practiced in many different ways as defined and covered by the claims.

[0023] Please refer to figure 1 , The luffing steel wire rope 2 is wound out from the reel of the luffing mechanism, passes through the fixed pulley block 4 on the A-frame 3 , and walks around the movable pulley block 5 on the boom 12 . When the luffing mechanism is in operation, the distance between the moving and fixed pulley blocks can be changed by retracting and releasing the luffing wire rope 2 wound on the drum, thereby realizing the luffing of the luffing jib tower crane. For example, the controller can be a single-chip microcomputer or a PLC controller.

[0024] As a first aspect of the invention, please refer to Figure 1 to Figure 4 , provides a tower crane anti-drop arm monitoring device, including: a stress detection unit, used to obtain the stress value directly or indirectly reflecting the stress o...

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Abstract

The invention provides a tower crane jib-dropping prevention monitoring device and method as well as a tower crane. The tower crane jib-dropping prevention monitoring device comprises a stress detecting unit and a controller, wherein the stress detecting unit is used for obtaining a stress value for directly or indirectly reflecting the stress situation of an amplitude-changing steel wire rope of the tower crane; the controller is connected with the stress detecting unit, and is used for controlling an amplitude-changing mechanism of the tower crane to stop operation when the stress value is reduced to a first preset value. According to the invention, the controller can be used for judging whether a jib-dropping risk exists or not and sending a control instruction to the amplitude-changing mechanism to enable the amplitude-changing mechanism to stop operation, namely, the operation of releasing the amplitude-changing steel wire rope is stopped according to the stress situation of the amplitude-changing steel wire rope detected by the stress detecting unit, so that the jib-dropping risk can be found out timely, and corresponding operation aiming at the risk can be carried out to avoid the jib-dropping accident and other safety accidents caused by the jib-dropping accident; the tower crane jib-dropping prevention monitoring device has the characteristics of simple structure and low cost, can be widely applied to fields of tower cranes, particularly luffing-boom tower cranes and the like.

Description

technical field [0001] The invention relates to the field of cranes, in particular to a monitoring device and method for an anti-drop arm of a tower crane and a tower crane. Background technique [0002] During the luffing process of the luffing jib tower crane, when the jib is turned to the maximum luffing angle (about 86 degrees), if there is a gust of wind or a mechanical failure, an unexpected situation may occur that the arm cannot be released normally. . At this time, the luffing mechanism may still operate normally, that is, the luffing wire rope is still being released continuously, thus causing the luffing wire rope to be in a slack state, but the boom does not "release the arm". [0003] Since the luffing wire rope is in a slack state, but the boom does not release the boom, if the boom can suddenly "release the boom" (such as: the gust disappears, etc.), the boom "dropping arm" will occur. Dangerous situation, this will produce greater "impact force" on the luff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/90B66C23/82
Inventor 易德辉李双林何首文
Owner ZOOMLION HEAVY IND CO LTD
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