An oxygen valve online repair method

A repair method and valve technology, applied in the field of test fixtures, can solve problems such as failure to open normally, high risk, accidents, etc.

Active Publication Date: 2015-11-25
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The starting and closing torques of many oxygen valves dedicated to oxygen systems are particularly large, which makes it difficult to open and close the valves during the shutdown and resumption of oxygen systems in recent years, and due to serious corrosion of thrust bearings, etc., often leads to failure of the drive mechanism (unable to normally on, off)
Since the oxygen pipeline is a first-class high-risk pipeline, the pressure of the oxygen pipeline network is 3.0Mpa. Once an oxygen leak occurs, as long as there is a little spark nearby, it will cause a large area of ​​oxygen-enriched combustion and cause a large-scale accident.
In particular, the key valve operating mechanism in the pipeline network fails and cannot be closed, which will further expand the scope of the accident, which may cause a very serious accident in which the blast furnace stops production, and at the same time threaten the lives of surrounding personnel
[0003] Because it is extremely dangerous to repair the oxygen valve and replace the driving mechanism online, the existing routine is to shut down the oxygen system, and replace the valve with a new one after the oxygen is released. Before putting into operation, all the air in the pipeline must be replaced with nitrogen. The whole construction process is dangerous and wastes a lot of energy
In addition, the unit price of the oxygen valve is also relatively expensive, and the replacement cost is relatively high

Method used

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  • An oxygen valve online repair method
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Embodiment Construction

[0024] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] see figure 1 As shown, the oxygen valve online repair method of the present invention mainly includes the following steps:

[0026] A. Please combine figure 2 As shown, measure and calculate the height of the valve stem 2 of the oxygen valve whose drive mechanism 1 has failed and the thread size of the valve stem 2, and provide the basis for the production size of the new bracket and drive mechanism.

[0027] B. Cut the bracket 4 at a position higher than the valve opening indicator block 3, cut off both sides of the bracket 4 and set a support rod 5 between the valve opening indicator block 3 and the valve flange; the cutting location (ie figure 1 The horizontal dotted line in ) should be about 5cm higher than the valve opening indicator block 3, so as to ensure that the indicator block 3 will not be touched when t...

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Abstract

The invention discloses an oxygen valve online repairing method which comprises the following steps: measuring the height of the valve rod and the size of treads; cutting a bracket and arranging a supporting rod; discharging a disabled valve driving mechanism and the cut bracket; mounting a new bracket on a valve flange; mounting a new horizontal driving mechanism, taking out the supporting rod, and accomplishing steps such as debugging. By adopting the repairing method, online repairing is realized without shutting down a oxygen system and exchanging the whole valve, so that the repairing efficiency is improved, and the repairing cost is decreased.

Description

technical field [0001] The invention relates to a fixture for testing, and more specifically relates to an online repair method for an oxygen valve. Background technique [0002] The starting and closing torques of many oxygen valves dedicated to oxygen systems are particularly large, which makes it difficult to open and close the valves during the shutdown and resumption of oxygen systems in recent years, and due to serious corrosion of thrust bearings, etc., often leads to failure of the drive mechanism (unable to normally on, off). Since the oxygen pipeline is a first-class high-risk pipeline, and the pressure of the oxygen pipeline network is 3.0Mpa, once an oxygen leak occurs, as long as there is a little spark nearby, it will cause a large area of ​​oxygen-enriched combustion and cause a large-scale accident. In particular, the key valve operating mechanism in the pipeline network fails and cannot be closed, which will further expand the scope of the accident, which m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/00
Inventor 陈小东兰河清盛新
Owner BAOSHAN IRON & STEEL CO LTD
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