Blind plate method of gas pipeline under pressure pumping and plugging

Abstract

The invention discloses a method for extracting and plugging a blind plate though a gas pipeline under pressure. The method is characterized by comprising the following steps of a, blind plate manufacturing, b, guide rod manufacturing, c, scaffold erection, d, site isolation, c, jack bracket erection, f, blind plate mounting, g, blind plate demounting, h, air replacement and i, site cleaning, and the blind plate is extracted and plugged through the gas pipeline under pressure. The method for extracting and plugging the blind plate though the gas pipeline under pressure has the beneficial effects that the construction steps are reasonable in design and simple in operation; the efficient, reasonable and safe technological process is brought into the work for extracting and plugging the blind plate though the gas pipeline under pressure through the innovative gas blind plate, innovative guide rods and an innovative space ring; the work process of the gas blind plate is effectively shortened; work efficiency is improved; the safety of operators is ensured; and the engineering cost is reduced.

Description

technical field [0001] The invention relates to a method for installing and removing a pipeline blind plate, in particular to a method for pumping and blocking a blind plate in a gas pipeline under pressure. Background technique [0002] In enterprises that produce or use gas, they often face the problem of reliably cutting off the gas source due to equipment maintenance, production shutdown, reconstruction (expansion) and unexpected accidents. As a safety measure that must be implemented in the process of cutting off the gas source, the blind plate with gas suction and plugging is currently the most common and reliable method. Blind plate pumping and blocking operations of gas pipelines are very dangerous, and if safety measures are not in place, it is easy to cause personnel poisoning, fire and explosion accidents. Many current technologies lack the standardization and standardization of the overall process. [0003] Chinese patent CN102927363B disclosed a construction m...

AI Technical Summary

Problems solved by technology

If this method is used to replace the blind plate with a new one, there will be an operational defect that the overall contact between the blind plate and the flange surface is improved, resulting in difficulty in assembly

[0004] Therefore there are above-mentioned inconveniences and problems in the operation of the known band gas suction plugging blind plate

[0005] Therefore, there are above-mentioned inconveniences and problems in the known gas pipeline with pressure suction plugging blind plate method.

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