High-pressure spray gun with outer connector

Abstract

The invention relates to the technical field of rust removal equipment and rust removal methods, and particularly discloses a high-pressure spray gun rust removal device and a rust removal method using the same. The 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 supercharged to 30 MPa, fine sand is prepared, and is sucked into the spray gun at the front end of high-pressure spray gun through negative pressure formed by the water flow to form water sand to be sprayed out; the high-energy water sand jetflow is utilized to impact and wear down a to-be-cleaned metal surface, the corrosion layer, the scale formation layer and other multi-position layers on the metal surface are distributed in a porousmode, once the scale formation layer is permeated, the high-pressure water sand jet flow is inserted into the portion between the scale formation layer and the metal base material in a wedge shape, when the impact energy of the jet flow is larger than the adhesion limit strength of the scale formation layer and the base material, the corrosion layer and the scale formation layer can be removed. The high-pressure spray gun rust removal device and the rust removal method using the same have the advantages that the high-pressure water jet flow is good in safety adaptability, and can be applied into flammable and explosive places, rust removal by the high-pressure water jet flow is high in safety performance and free of physical damage to operators, any life influence on surrounding people isavoided in the rust removal process.

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 an external joint. 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 an external joint, which can be constr...

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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