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Crane telescopic boom control device and method and crane

A technology of control device and telescopic arm, which is applied in the field of communication, can solve problems such as misjudgment of pressure charging, and achieve the effect of avoiding misjudgment of pressure charging and realizing accurate judgment

Active Publication Date: 2015-04-08
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a crane telescopic arm control device and method and a crane to at least solve the problem that the prior art cannot address the problem of misjudgment of pressure in the process of oil replenishment and pressure charging of the single-cylinder plug-type telescopic arm

Method used

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  • Crane telescopic boom control device and method and crane
  • Crane telescopic boom control device and method and crane
  • Crane telescopic boom control device and method and crane

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Embodiment Construction

[0050] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0051] In this embodiment, a crane telescopic boom control device 10 is provided, such as figure 1 shown, including:

[0052] The displacement sensor 11 is arranged at the tail of the telescopic arm, and is used to obtain the current extension length of the telescopic oil cylinder and the initial length of the last extension of the telescopic oil cylinder;

[0053] The controller 12 is connected with the displacement sensor 11, and is used to obtain the current extension length of the telescopic oil cylinder sent by the displacement sensor and the initial length of the telescopic oil cylinder that completed the last extension when the preset condition is satisfied, and When the first difference fro...

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Abstract

The invention discloses a crane telescopic boom control device and method and a crane. The device comprises a displacement sensor and a controller, wherein the displacement sensor is arranged at the tail part of a telescopic boom, and used for acquiring the current extension length of a telescopic oil cylinder and the initial length of the telescopic oil cylinder during last extension, the controller is connected with the displacement sensor and used for acquiring the current extension length of the telescopic oil cylinder and the initial length of the telescopic oil cylinder during last extension, which are sent by the displacement sensor, when the preset conditions are met, and triggering an oil cylinder electromagnetic valve for turning on the telescopic oil cylinder when a first difference between the initial length and the current extension length is greater than or equal to a first preset value, so that a rod-less cavity of the telescopic oil cylinder is pressurized, and the pressurization judgment error problem of a single-cylinder bolt type telescopic boom during an oil charging and pressurizing process in the prior art can be solved.

Description

technical field [0001] The invention relates to the communication field, in particular to a crane telescopic arm control device and method and a crane. Background technique [0002] The telescopic mechanism of the crane has two types: hydraulic cylinder plus rope row type and single cylinder latch type. In general, cranes with more than 5 jib sections can only adopt single-cylinder bolt-type telescopic mode. Cranes with single-cylinder bolt-type telescopic mechanisms have the advantages of light weight of the boom, large lifting capacity, and many boom sections, and are widely used in large-tonnage cranes. [0003] The basic principle of the single-cylinder plug-type telescopic system is that when the weight is hoisted or the telescopic is completed, the two booms are mutually pinned through the bearing pins, and the telescopic cylinder does not carry the load. When it is necessary to stretch a section of the boom, the telescopic oil cylinder drives the latch mechanism on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C13/18B66C23/693
CPCB66C13/22B66C23/705B66C2700/03
Inventor 刘永赞毛艳张松林
Owner ZOOMLION HEAVY IND CO LTD
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