Filter element blowback device for automatic sand blasting derusting device

Abstract

The invention discloses a filter element blowback device for an automatic sand blasting derusting device, and belongs to the field of pipeline derusting. In the filter element blowback device, a blowback rotary wing component comprises a square pipe and a vertical pipe, wherein the vertical pipe is fixed and communicated with middle parts of an upper horizontal pipe and a lower horizontal pipe ofthe square pipe; and a plurality of air outlets are formed in pipe walls of a left vertical straight pipe and a right vertical straight pipe of the square pipe. A bracket comprises a cylindrical support body, an annular support plate and a cover body, wherein the cylindrical support body, the annular support plate and the cover body are arranged from inside to outside; the annular support plate isfixed at the upper part of a filter element; an air inlet pipe penetrates through the top of the cover body; the lower end of the air inlet pipe is rotationally connected with the upper end of the vertical pipe; and the lower end of the vertical pipe rotationally penetrates through the bottom of the filter element. A blasting blowback pipe sequentially penetrates through the side walls of the cover body and the cylindrical support body, and the pipe opening of the blasting blowback pipe is downwards opposite to the open end of the filter element; a sealing plate can axially and slidably sleeve the air inlet pipe to open or close the cylindrical support body; and a blowback air storage tank is connected with a first pulse valve and a second pulse valve, the first pulse valve is connected with the upper end of the air inlet pipe, and the second pulse valve is connected with the pipe opening of the blasting blowback pipe.

Description

technical field [0001] The invention relates to the field of rust removal for pipelines, in particular to a filter element blowback device used for an automatic sandblasting and rust removal device. Background technique [0002] In the application process of oil and gas pipelines, in order to improve the mechanical strength of oil and gas pipelines, automatic sand blasting and derusting devices are usually used to derust the surface. Specifically, compressed air is used as the power to spray abrasives at high speed onto the surface of the pipeline to be treated. Use the hardness and impact toughness of the abrasive itself to remove the rust on the surface of the pipeline, thereby improving the mechanical properties and fatigue resistance of the pipeline. Automatic sand blasting and rust removal devices are common in this field. For example, Wang Changjiang et al. "Application of automatic sand blasting and rust removal devices in the third pipeline project of West-to-East Ga...

AI Technical Summary

Problems solved by technology

[0005] The filter back blower provided by the prior art is not effective in blowing off the rust dust on the filter, and it is difficult to blow back the dead angle inside the filter

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