A speed-controllable corrosion inhibitor coating device for gathering and transportation pipelines

Abstract

The invention discloses a corrosion inhibitor coating device with controllable speed of a gathering and transportation pipeline. The corrosion inhibitor coating device comprises a controllable speed part and a film coating device; the inner part of the controllable speed part is a high-pressure air storage cylinder, and the outer periphery of the controllable speed part is sleeved with at least one sealing rubber cup; the front end of the high-pressure air storage cylinder is provided with a speed control valve and a first group of rotating mechanisms, the rear end of the high-pressure air storage cylinder is provided with a second group of rotating mechanisms and a first connecting ring, a plurality of circumferential rotating bearings and two groups of axial rotating bearings are uniformly mounted on the outer wall of the high-pressure air storage cylinder in the circumferential direction; the inside of a cylinder body of the film coating device is hollow and is used for storing a corrosion inhibitor, a liquid outlet groove and a film coating brush are arranged on the periphery of the cylinder body, a second connecting ring is arranged at the front end of the cylinder body, the first connecting ring is connected with the second connecting ring, and when the film coating device exceeds a preset speed, the speed control valve is opened. According to the corrosion inhibitor coating device, gas emitted by the high-pressure air storage cylinder of the controllable speed part can slow down the device, the running speed is controlled to be lower than a specific value, and the film coating device is uniformly coated on the inner wall of the pipeline by the film coating brush carrying the corrosion inhibitor, and therefore, the situation that the speed is controllable, the coating film is automatic and the coating film are uniform can be achieved.

Description

technical field [0001] The invention belongs to the field of anticorrosion of oil and gas storage and transportation pipelines, in particular to a corrosion inhibitor film coating device with controllable speed for gathering and transportation pipelines. Background technique [0002] In gas field exploitation, because the gas often contains a large amount of acidic corrosive gas and high-sulfur gas, when liquid accumulates in the pipeline, the acidic liquid formed will cause serious corrosion to the pipeline, cracking and perforating the pipeline, resulting in gas leakage and serious accidents such as pipeline rupture. At present, when coating the interior of the pipeline with a corrosion inhibitor, two pigs are often sent into the pipeline, so that the corrosion inhibitor is filled between the two pigs, and a film applicator with a brush is placed , as the pig moves forward, the film applicator will rotate, and the brush will carry the corrosion inhibitor to coat the inner...

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Problems solved by technology

However, due to the limited battery power during operation, the device cannot run for a long time, so it cannot be widely used

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