Medium pressure steam drum capable of shortening pressurizing time

Abstract

The invention relates to a medium pressure steam drum capable of shortening pressurizing time. The medium pressure steam drum comprises a shell, a plurality of upper joint pipes arranged on the shell and a plurality of lower joint pipes arranged under the shell; the lower end of each upper joint pipe is welded with the shell; the upper end of each upper joint pipe is welded with an upper pipe cap; a threaded hole is formed in each upper pipe cap and is internally provided with a plug; the upper end of each lower joint pipe is welded with the shell; and the lower end of each lower joint pipe is welded with a lower pipe cap, thus air in the medium pressure steam drum can be emptied before pressure testing, the pressurizing difficulty of a worker can be greatly lowered during pressurizing, the pressurizing time of the worker is shortened, and the production efficiency is improved.

Description

[0001] 【Technical field】 [0002] The invention relates to a steam drum, in particular to a medium-pressure steam drum which can reduce pressing time. [0003] 【Background technique】 [0004] The steam drum (also known as the drum) is the most important pressure component in the natural circulation boiler. It is mainly used in the medium-pressure and high-pressure subcritical boilers for power production. The medium-pressure steam drum in the prior art generally includes a cylindrical shell and a set Several connecting pipes on the cylindrical shell, the connecting pipes are of closed structure, as a pressure vessel, the pressure test of the medium-pressure steam drum is generally carried out before leaving the factory. The common method is to inject water into the medium-pressure steam drum The pressure test is carried out inside. When the water fills the entire inner cavity of the shell, the air in the medium pressure steam drum will run to the top of several connecting pipes...

AI Technical Summary

Problems solved by technology

[0004] The steam drum (also known as the drum) is the most important pressure component in the natural circulation boiler. It is mainly used in the medium-pressure and high-pressure subcritical boilers for power production. The medium-pressure steam drum in the prior art generally includes a cylindrical shell and a set Several connecting pipes on the cylindrical shell, the connecting pipes are of closed structure, as a pressure vessel, the pressure test of the medium-pressure steam drum is generally carried out before leaving the factory. The common method is to inject water into the medium-pressure steam drum The pressure test is carried out inside. When the water fills the entire inner cavity of the shell, the air in the medium pressure steam drum will run to the top of several connecting pipes. Due to the existence of the air at the top of the connecting pipe, the staff needs to do the pressure test. Spend more pressing time, greatly reducing work efficiency

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