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Method, device and system for controlling suspension arm of crane, as well as crane

A control method and technology for a control system, applied in the field of cranes, can solve the problems of low crane operation safety, difficulty in ensuring the rationality of the boom, accident consequences, etc., and achieve the effects of improving operation safety, reducing impact and avoiding accidents.

Active Publication Date: 2015-07-01
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the control of the boom of the crane in the prior art relies entirely on the operator's own experience. Even if the operator has rich construction experience, it is difficult to ensure the rationality of the boom control, resulting in the failure of the crane. Less safe operation with possible serious accident consequences

Method used

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  • Method, device and system for controlling suspension arm of crane, as well as crane
  • Method, device and system for controlling suspension arm of crane, as well as crane
  • Method, device and system for controlling suspension arm of crane, as well as crane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 2 Shown is a detailed flow chart of the boom control method of the crane provided in Embodiment 1 of the present invention, which specifically includes the following steps:

[0041] Step 201: Determine the current motion state of the boom of the crane.

[0042] Specifically, the state of motion of the boom of the crane can be judged by detecting the position of the telescopic pedal of the crane.

[0043] When it is determined that the boom of the crane is currently in the state of extending motion, enter step 202; when it is determined that the boom of the crane is currently in the state of retracting motion, enter step 203.

[0044] Step 202, judging whether the length of the boom is greater than or equal to a first length threshold.

[0045] When it is determined that the length of the boom is less than the first length threshold, it indicates that the extension of the boom is not close to the bottom position, and enter step 204; when it is determined that t...

Embodiment 2

[0055] Based on the same inventive concept, according to the boom control method of a crane provided in the above-mentioned embodiments of the present invention, correspondingly, Embodiment 2 of the present invention also provides a boom control device of a crane, the structural diagram of which is as follows image 3 shown, including:

[0056] A signal receiving unit 301, configured to receive the detected motion state of the boom of the crane and the length of the boom;

[0057] Logical judging unit 302, used for when the boom of the crane is in the extended motion state, the length of the boom is greater than or equal to the first length threshold, or when the boom of the crane is in the retracted motion state, the length of the boom is less than or equal to the second threshold When the length threshold is reached, the flow rate of the boom telescopic hydraulic oil circuit is controlled to decrease to reduce the boom telescopic speed.

[0058] Further, the logic judging u...

Embodiment 3

[0062] Based on the same inventive concept, according to the boom control method of the crane provided in the above embodiments of the present invention, correspondingly, the embodiment of the present invention also provides a boom control system of the crane, and its structural diagram is as follows Figure 4 shown, including:

[0063] Motion state detection device 401, used to detect the state of motion of the boom;

[0064] A length detection device 402, used to detect the length of the boom;

[0065] The controller 403 is connected to the motion state detection device and the length detection device, and is used for when the boom of the crane is in the extended motion state and the length of the boom is greater than or equal to the first length threshold, or when the boom of the crane is in the retracted motion state , when the length of the boom is less than or equal to the second length threshold, the flow rate of the telescoping hydraulic oil circuit of the boom is con...

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PUM

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Abstract

The invention discloses a method, a device and a system for controlling a suspension arm of a crane, as well as the crane, which can improve the operation safety of the crane. The method for controlling the suspension arm comprises the following steps: detecting the motion state of the suspension arm of the crane and the length of the suspension arm; controlling to reduce the flow of a telescopic hydraulic circuit when the suspension arm of the crane is in an extending motion state, and the length of the suspension arm is more than or equal to the threshold of a first length, or when the suspension arm of the crane is in a retracting motion state, and the length of the suspension arm is less than or equal to the threshold of a second length.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a crane arm control method, device, system and a crane. Background technique [0002] At present, the application of cranes with boom telescopic function is more and more extensive. In the prior art, when the operator controls the expansion and contraction of the boom of the crane, the operator controls the motion state of the boom of the crane by controlling the position of the telescopic pedal, that is, controls whether the boom is in an extended motion state or a retracted motion state, and controls the throttle The opening of the pedal controls the telescoping speed of the boom. [0003] When the boom of the crane stretches to the bottom position, a rigid collision will be formed between the booms of each section, causing an impact. Therefore, when the operator observes that the extension and extension of the boom of the crane is close to the bottom position, it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/88B66C13/20B66C23/687
Inventor 范志勇梁更生
Owner ZOOMLION HEAVY IND CO LTD
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