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Method and device for preventing load impacting in crane hook lifting process

A technology of cranes and hooks, applied in the direction of load hanging components, transportation and packaging, etc., can solve the problems of high speed of load movement, short safety distance, equipment damage, etc., and achieve the effect of eliminating the influence of inertia and preventing impact

Inactive Publication Date: 2008-07-09
CRRC QIQIHAR ROLLING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Especially when the moving speed of the load is high and the safety distance is too short, the load will directly hit the hoisting mechanism of the crane, which will cause damage to the equipment and even cause casualties.

Method used

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  • Method and device for preventing load impacting in crane hook lifting process
  • Method and device for preventing load impacting in crane hook lifting process
  • Method and device for preventing load impacting in crane hook lifting process

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Embodiment Construction

[0047] For the convenience of discussion, the relevant symbols are defined below.

[0048] Referring to Fig. 1, this figure is the structural diagram of the gantry crane of the present invention. For gantry cranes: the hook height H is the actual height from the hook 5 to the center of the lifting pulley block 4; the hook limit height H 1 , is the actual height from the center of the lifting pulley block 4 when the hook 5 is at the upper limit position.

[0049] Referring to Fig. 2, this figure is a structural diagram of the jib crane of the present invention. For jib cranes: the hook height H is the actual height from the hook 5 to the center of the lifting pulley block 4; the hook limit height H 1 , is the actual height from the center of the lifting pulley block 4 when the hook 5 is at the upper limit position; the original length of the boom is the length when the boom 3 is not extended; the length L when the boom is extended 1 , is the length when the boom 3 is stretch...

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Abstract

The present invention discloses a method for preventing load impact during the lifting process of a crane hook, which comprises the following steps that 11) the relevant detection data of a steel wire and the hook are obtained at real time to be used for calculating the current data of the discharged length and speed of the steel wire and the height and speed of the hook; 12) a deceleration distance is calculated according to the current hook speed and a read hoisting acceleration; 13) judging if the hook enters a targeted decelerating area, the step 14) is processed, otherwise, the step 11) is processed; 14) if the hook is judged not arriving at a braking position, the step 15) is processed, otherwise the step 16) is processed; 16) a stop instruction is sent, and the hook is braked by a power transmission system. The present invention also discloses a device which prevents the load impact during the lifting process of the crane hook.

Description

Technical field: [0001] The invention relates to the field of cranes, in particular to a method and device for preventing load shocks during lifting and lowering of crane hooks. Background technique [0002] Due to the continuous expansion of industrial production scale, increasing production efficiency, and the gradual increase in the proportion of material handling costs in the product production process, the demand for large or high-speed cranes continues to increase, the lifting capacity is increasing, and the working speed is increasing. High, and put forward higher requirements for energy consumption and reliability. Because of its great role in improving labor productivity, speeding up project progress, and reducing labor intensity of workers, cranes have become an important link in the automated production process and are widely used in national economic sectors such as transportation, mining, petroleum, and construction. . However, during the use of the crane, per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C13/18B66C1/34
Inventor 钮承吴齐生张力群
Owner CRRC QIQIHAR ROLLING CO LTD
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