Method for cleaning or corrosion-protective coating inner wall of industrial pipeline and device

Abstract

The invention discloses a method for cleaning or coating the inner wall of an industrial pipeline, which comprises the following steps: 1. one end of a cleaning or coating pipe body with an identical internal diameter is connected with one end of a pipeline to be processed; 2. two working heads matched with the inner wall of the pipeline to be processed are arranged in the cleaning or coating pipe body, and an oblique groove is formed on the outer circular surface of one working head or each working heads; 3. cleaning agent or anti-corrosive paint served as working medium is arranged between the two working heads; 4. compressed air enters from the other end, and the working head advances spirally under the push of pneumatic pressure, thereby pushing the working head and working medium at the other end to advance in the pipeline to be processed; and the working medium is pushed to clean and coat the inner wall of the pipeline to be processed. The method and the device of the invention ensure that the inner wall of the industrial pipeline, in particular to pipelines embedded under ground or other equipment, can be cleaned and coated on line without being dismantled; the costs of cleaning and coating are greatly reduced, and the time for pipeline maintenance is greatly saved.

Description

technical field [0001] The invention relates to a cleaning or anti-corrosion coating method and device for the inner wall of industrial pipelines used in industrial manufacturing and processing fields such as petroleum, chemical industry and pharmacy. Background technique [0002] In the fields of petroleum, chemical, pharmaceutical and other industrial manufacturing and processing, a large number of pipelines are needed to transport various media such as petroleum, chemical raw materials, and pharmaceutical raw materials from the previous process to the next process, or from one place to another. Due to the complexity of the transmission medium, many media are corrosive, many of which are strongly corrosive, and have a strong corrosive effect on the inner wall of the pipeline; if the service time is a little longer, the inner wall of the pipeline will inevitably be corroded and rusted. From the perspective of safe production and product quality improvement , all require tha...

AI Technical Summary

Problems solved by technology

This method has a certain effect on straight pipes, but its disadvantages are mainly that the effect on pipes buried underground or under other equipment is poor, and the cleaning and coating effects are difficult to control, and the types of coatings that can be used are also limited. The thickness of the layer is also difficult to control, and it is difficult to achieve the coating thickness required by the process. It is not suitable for online cleaning and coating of the inner wall of the pipeline without dismantling the pipeline.

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