Oxygen valve online repairing method

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...

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

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