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Hydraulic lifting and leveling device and its control method

A technology of leveling device and hydraulic lifting, applied in the direction of lifting device, lifting frame, etc., can solve the problem of not being able to maintain a horizontal plane, etc., and achieve the effect of simple and practical hydraulic control circuit

Inactive Publication Date: 2011-12-28
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This hydraulic leveling method only allows each leg to be lifted and lowered independently to adapt to various uneven sites, and it does not guarantee that each position of each leg can be maintained at a horizontal level after lifting.

Method used

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  • Hydraulic lifting and leveling device and its control method
  • Hydraulic lifting and leveling device and its control method

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Embodiment

[0020] The hydraulic lifting and leveling device of this embodiment is a preferred embodiment of the hydraulic lifting and leveling device of the present invention. In this embodiment, the skirt on the converter is used as an example to illustrate the device that needs to be lifted. The hydraulic lifting and leveling device of this embodiment includes a hydraulic control circuit for driving the skirt cover (not shown in the figure) up and down, and eight limit switches (not shown in the figure, It is four high position limit switches located at the lifting high position and four low position limit switches located at the lifting low position at the four corners of the skirt cover) and an electric controller (not shown) connected to the limit switch signal output.

[0021] The hydraulic control circuit contains four hydraulic cylinders 13, 14, 15, 16 connected to the four corners of the skirt, four first hydraulic control check valves 9, 10, 11, 12 and four two-way valves respec...

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Abstract

The invention relates to a hydraulic elevating leveling device and a control and use method for the same, belonging to the technical field of hydraulic control. The device comprises a hydraulic control loop, a limit switch and an electric controller, wherein the hydraulic control loop comprises a hydraulic cylinder, a first hydraulic control one-way valve and a two-position three-way electromagnetic directional valve respectively matched with the hydraulic cylinder in quantity, a balance cylinder, a two-position four-way electromagnetic directional valve, a second hydraulic control one-way valve, a three-position four-way electromagnetic directional valve and a hydraulic power oil source. The method comprises the following steps of: respectively controlling a coil at one side or the other side of the three-position four-way electromagnetic directional valve to be electrified, and controlling the two-position four-way electromagnetic directional valve and the two-position three-way electromagnetic directional valve to be powered off; according to three conditions that the hydraulic cylinder reaches an elevating high position or low position, respectively taking the three steps of stopping oil supply, independently driving the hydraulic cylinder or stopping oil supply after delaying for a certain time. In the device and the method, each hydraulic elevating control process is divided into steps of firstly elevating quickly, and then independently controlling the actions of the hydraulic cylinder, thereby accurately regulating the elevating of the hydraulic cylinder.

Description

technical field [0001] The invention relates to a device for adjusting the balance of a hydraulic lifting device, which belongs to the technical field of hydraulic control. Background technique [0002] In actual production, there are many equipment or devices that need to be lifted using multi-point hydraulic lifting devices. For example, the skirt cover on the converter, large platform or some vehicles etc., are exactly to be lifted by the expansion and contraction of four (or more) oil cylinders connected to each other at its four corners (or multiple places). However, in the frequent lifting of these equipment or devices using multi-point hydraulic lifting devices, the lifting positions between multiple oil cylinders will form cumulative errors, so that after repeated lifting and lowering for many times, the equipment or devices cannot be kept horizontal and tilted, resulting in Major accidents such as equipment damage or even damage. [0003] In order to ensure that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66F7/20
Inventor 常发黄成永饶刚孟海忠马晓芳高原杨洪
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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