Multi-oil-cylinder sequential telescopic system and crane

A sequential telescopic and oil cylinder technology, which is applied to cranes, mechanical equipment, fluid pressure actuators, etc., can solve the problems of reducing hydraulic system efficiency, difficulty, and increased heat generation

Inactive Publication Date: 2016-08-17
SANY PALFINGER SPECIAL VEHICLE
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0003] Due to the decompression effect of the sequence valve, when the subsequent oil cylinder operates, the pressure of the hydraulic system must be increased by P on the basis of the previous one; the increase of the system pressure will lead to a sharp increase in heat generation, which reduces the effici...

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  • Multi-oil-cylinder sequential telescopic system and crane
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  • Multi-oil-cylinder sequential telescopic system and crane

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Embodiment Construction

[0025] It should be noted that, in the case of no conflict, the embodiments of the present invention 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.

[0026] figure 2 Shown is the hydraulic principle diagram of the multi-cylinder sequential telescoping system provided by the specific embodiment of the present invention; image 3 Schematic diagram of the structure of the multi-cylinder sequential telescoping system provided for the specific embodiment of the present invention. At this time, the first oil cylinder 1 and the second oil cylinder 2 are both in the retracted state; Figure 4 for image 3 In the multi-cylinder sequential telescopic system shown, at this time, the first cylinder 1 is in an extended state, and the second cylinder 2 is in a retracted state; Figure 5 for image 3 In the shown multi-cylinder sequential telescoping sy...

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Abstract

The invention discloses a multi-cylinder sequential telescopic system. The multi-cylinder sequential telescopic system is provided with a first stroke valve and a second stroke valve, and uses the first stroke valve and the second stroke valve to control the first and second cylinders Sequential scaling. The multi-cylinder sequential expansion and contraction system can not only realize the sequential expansion and contraction of multiple oil cylinders, but also does not increase the pressure of the hydraulic system. In the case of a large number of oil cylinders, it is less difficult to implement and the cost is lower. On this basis, the present invention also proposes a crane with the multi-cylinder sequential telescoping system.

Description

technical field [0001] The invention relates to the control technology of multi-stage oil cylinders, in particular to a multi-oil cylinder sequential telescoping system and a crane. Background technique [0002] At present, the boom telescoping mechanism driven by the oil cylinder is a commonly used mechanism for hydraulic cranes. The boom driven by multiple oil cylinders has the advantages of strong lifting capacity and simple telescopic rope row mechanism. The booms with five-section boom and above adopt the form of multi-stage telescopic oil cylinder. For small cranes, due to the small size of the telescopic cylinder, complex pipelines and controls cannot be realized inside. Therefore, the currently commonly used sequence expansion and contraction control in China is generally realized by two sequence valves, but due to its shortcomings such as large pressure loss and unstable sequence function, its application has been limited. For this reason, it was proposed figure...

Claims

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Application Information

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IPC IPC(8): F15B11/20B66C23/693
CPCF15B11/20B66C23/705
Inventor 刘丹赵文浩顾明明
Owner SANY PALFINGER SPECIAL VEHICLE
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