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Jacking structure of tower crane and hydraulic system and jacking method thereof

A tower crane and hydraulic system technology, applied in the field of hydraulic systems, can solve problems such as inability to run synchronously, and achieve the effects of solving inability to synchronize and overcoming poor results.

Active Publication Date: 2013-09-18
ZOOMLION HEAVY IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a jacking structure of a tower crane, a hydraulic system of the jacking structure and a jacking method of a tower crane, so as to solve the problem that tower cranes in the prior art cannot operate synchronously when using multiple oil cylinders for jacking question

Method used

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  • Jacking structure of tower crane and hydraulic system and jacking method thereof
  • Jacking structure of tower crane and hydraulic system and jacking method thereof
  • Jacking structure of tower crane and hydraulic system and jacking method thereof

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Embodiment Construction

[0030] 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. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0031] Such as figure 1 As shown, the tower crane according to the embodiment of the present invention drives the climbing frame 31 of the tower crane to lift on the tower body 39 of the tower crane through the hydraulic system of the jacking structure, for example, the climbing frame 31 is supported and driven by the hydraulic system , lift up and down on the tower body 39 by the guide wheel 32 on the tower body 39 . Hydraulic system comprises a plurality of oil cylinders 15, for example can comprise: two, three, four, six or eight oil cylinders, when adopting above-mentioned number of oil cylinders 15, oil cylinders 15 are arranged easily, when for example comprising two oil cylinders 15, tw...

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Abstract

Disclosed are a lifting structure of tower crane, a hydraulic system for the lifting structure, and a lifting method for tower crane. The hydraulic system of the lifting structure of tower crane comprises a forward branch working oil-way and a reverse branch working oil-way. Arranged on the forward working oil-way of each oil cylinder is a forward speed regulator valve for adjusting the flow rate of hydraulic oil. Arranged on the reverse branch working oil-way of each oil cylinder is a reverse governor valve for adjusting the reverse flow rate of the hydraulic oil. The lifting structure of tower crane comprises the hydraulic system for lifting structure. In the lifting method for the tower crane, the forward governor valve and the reverse governor valve on each oil cylinder are used to control the forward and reverse flow rate of the hydraulic oil in the branch working oil-ways of each oil cylinder and the synchronization accuracy of each cylinder, and synchronized lifting of each of the cylinders is allowed by keeping equal the forward and reverse flow rate of the hydraulic oil in the branch working oil-ways of each oil cylinder and by the synchronized lifting of each of the cylinders.

Description

technical field [0001] The invention relates to the field of cranes, in particular to a jacking structure of a tower crane, a hydraulic system of the jacking structure, and a jacking method of the tower crane. Background technique [0002] At present, most self-elevating tower cranes use a single-cylinder jacking hydraulic system, and a small number of self-elevating tower cranes with larger tonnages use a double-cylinder jacking hydraulic system, which rigidly connects the balance valve or hydraulic lock. On the cylinder block, the purpose of anti-explosion is achieved and safety is ensured. However, if the above-mentioned method is adopted for the self-elevating tower crane of extra large tonnage, the size of the jacking cylinder will be huge, and installation and maintenance will be inconvenient. [0003] For large-tonnage self-elevating tower cranes with more than two cylinders and multi-cylinder jacking operations, if the balance valve or hydraulic lock is simply rigid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C13/20B66C23/62
CPCB66C23/32B66C23/283
Inventor 张义亮毛快胡圣雷梁莎李柏吴茂李宇力陈龙剑周汉麟
Owner ZOOMLION HEAVY IND CO LTD
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