High-pressure spray gun with sliding block

Abstract

The invention relates to the technical field of derusting equipment and derusting methods, and particularly discloses a high-pressure spray gun derusting device and a derusting method using the same.The derusting method comprises the following steps that a high-pressure spray gun, a water pump and a booster pump are connected well; the booster pump is pressurized to 30 MPa, fine sand is prepared,and the fine sand is sucked into the spray gun by negative pressure formed by water flow at the front end of the high-pressure spray gun to form water sand to be sprayed out; and a high-energy watersand jet is used to impact and grind a to-be-cleaned metal surface, a rust layer, a scaling layer and the like on the metal surface are distributed in a layered and porous mode, once the scaling layeris penetrated, the high-pressure water sand jet can be wedged between the scaling layer and a base metal, and when the impact energy of the water sand jet is greater than the adhesion limit strengthbetween the scaling layer and the base metal, the rust layer and the scaling layer are removed. The device and the method have the advantages that the high-pressure water jet has good safety adaptability, can be applied in inflammable and explosive places, has high safety performance in derusting, and has no physical injury to operators. The derusting process has no impact on the lives of surrounding people.

Description

technical field [0001] The invention relates to the technical field of derusting equipment and derusting methods, in particular to a high-pressure spray gun with a sliding block. Background technique [0002] LNG storage tanks are prone to rust. At present, manual derusting or electric grinding wheels are generally used for anti-corrosion and derusting. The production device area of ​​LNG storage tanks is a flammable and explosive area. No matter whether manual derusting or electric derusting is used, there will be sparks. In order to ensure safety, rust removal and anticorrosion work cannot be carried out at many points. Even areas where rust removal work can be carried out require a lot of safety work in the early stage before construction, and the construction progress and construction quality cannot be guaranteed. Contents of the invention [0003] The purpose of the present invention is to provide a high-pressure spray gun with a sliding block, which can be constructe...

AI Technical Summary

Problems solved by technology

[0002] LNG storage tanks are prone to rust. At present, manual derusting or electric grinding wheels are generally used for anti-corrosion and derusting. The production device area of ​​LNG storage tanks is a flammable and explosive area. No matter whether manual derusting or electric derusting is used, there will be sparks. In order to ensure safety, rust removal and anti-corrosion work cannot be carried out at many points. Even areas where rust removal work can be carried out require a lot of safety work in the early stage before construction, and the construction progress and construction quality cannot be guaranteed.

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