Integral Hoisting Method of Hydraulic Cylinder in Confined Space

An overall hoisting and confined space technology, which is applied in the direction of transportation and packaging, load hanging components, etc., to reduce the disassembly process, protect the equipment body, and prolong the service life

Active Publication Date: 2020-10-30
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the difficulties and problems in the maintenance process in the confined space of the tailwater accident gate, the present invention provides a method for the maintenance of the restricted space of the tailwater accident gate, and the overall hoisting of the hydraulic cylinder does not need to forcibly cut and damage the corresponding metal components to facilitate Efficient method for easy operation and no replacement of corresponding parts

Method used

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  • Integral Hoisting Method of Hydraulic Cylinder in Confined Space
  • Integral Hoisting Method of Hydraulic Cylinder in Confined Space
  • Integral Hoisting Method of Hydraulic Cylinder in Confined Space

Examples

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Effect test

Embodiment 1

[0027] Example 1: In order to ensure the smooth implementation of the overhaul of the gate system, the existing equipment and systems are analyzed and studied, and the following overall hoisting solutions are obtained.

[0028] (1) After the tailwater tunnel of the unit is emptied, the maintenance personnel strictly follow the safety management regulations for working in a limited space, enter the lower part of the gate groove 7 through the tailwater inlet door, and place two square logs with a height of 200mm directly below the gate. It is used to support the gate body 8, and at the same time, the space at the bottom can drain away the tunnel seepage water. After the gate was implemented on the square timber, the hydraulic cylinder hanger 12 was disassembled. Start the oil station, retract the piston rod of the hydraulic cylinder, and put into hydraulic locking.

[0029] (2) Considering that the hydraulic cylinder 1 and the top cover of the gate slot are forcibly cut, the me...

Embodiment 2

[0039] Embodiment 2: Another overall hoisting method of a hydraulic cylinder in a confined space. First, after the tailwater tunnel of the unit is emptied, the maintenance personnel enter the lower part of the gate groove through the tailwater inlet door, and place the high-level h1 vertically and symmetrically directly below the gate. The bottom positioning frame is used to support the gate body 8, such as Figure 5 The bottom positioning frame shown includes a base 23 and a support member 25. Fixing bolts 24 are installed vertically at symmetrical positions on both sides of the base, and screw holes 27 are vertically arranged on the two support members and are installed on corresponding fixing bolts. , the supporting surfaces 26 on the upper sides of the two supporting members are supported on the bottom of the gate body. The height of the support can be adjusted by rotating the support so as to achieve the most reasonable support height.

[0040] Further drain away the see...

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Abstract

The invention discloses an integral hoisting method for a hydraulic cylinder in limited space. The method comprises the following steps that after a unit tail water tunnel is emptied, a maintainer enters the lower part of a gate groove through a tail man door, bottom positioning frames are vertically and symmetrically arranged right under a gate and are used for supporting a gate body, and meanwhile, leakage water at a bottom space tunnel is discharged; after the gate falls down and sits on the bottom positioning frames, a hydraulic cylinder lifting head is disassembled; and an oil station isstarted, a piston rod of the hydraulic cylinder is retracted, and a hydraulic locking part is put. According to the integral hoisting method of the hydraulic cylinder in the limited space, under the condition that a special tool is not required to be manufactured, a planning scheme is precisely calculated by using existing equipment, the psychological pressure and the injury risk of the maintainerworking in the limited space for a long time can be greatly eliminated, meanwhile, the unnecessary disassembling process is omitted, an equipment body is greatly protected, and the service life of the equipment is prolonged.

Description

technical field [0001] The invention belongs to the technical field of fault maintenance of generating sets of hydropower stations, and in particular relates to an integral hoisting method of a hydraulic cylinder in a restricted space of a tailwater accident gate. Background technique [0002] Each unit of Baoquan Company is equipped with a tailwater accident gate (tail gate), a total of four tailwater gates, and the four gates share a set of hydraulic system. The opening and closing of the tail gate is operated by a hydraulic hoist, with one door and one machine configuration. The hydraulic cylinder of this hydraulic hoist is 9405mm high, with a cross-sectional diameter of 590mm and a weight of 11.338t; figure 1 shown. During the overhaul of the gate system, it is necessary to use the bridge crane to hoist the hydraulic hoist and the gate separately for work. The technical difficulties encountered are as follows: [0003] 1) The tailwater accident gate of the company is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C1/16B66C1/12B66C13/08
CPCB66C1/12B66C1/16B66C13/08
Inventor 王啸李刚李坤鹏常东亮贾瑞卿郭贤光臧克佳王浩姜沛东
Owner STATE GRID CORP OF CHINA
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