Rust removal apparatus for inner walls of bend pipes

Abstract

The invention relates to a rust removal apparatus for inner walls of bend pipes. The rust removal apparatus comprises a trolley for placing several bend pipes onto a guide rail to move. A sand-blasting gun supported by a triangle support frame is arranged at one side of the trolley. A metal tube sleeves a nozzle of the sand-blasting gun, and sand-blasting equipment for placing river sand is connected at one end of the sand-blasting gun. A baffle plate is also arranged at one side of the trolley. Several fixing devices for fixing the bend pipes are mounted on the trolley. Each fixing device comprises a compression ring for inserting and fixing a bend pipe. A retaining ring for fixing a bend pipe is disposed in the middle of ends of each two compression rings. The distance from the nozzle and an opening of a bend pipe is 300-500 mm, and diameter of a nozzle outlet is 8-10 mm. The rust removal apparatus has a simple structure, is convenient to operate and is reasonably designed. Through rotary sand-blasting, rust is removed cleanly. By using common river sand as the rust removal material, the rust removal apparatus is low-cost. Through production practice, rust removal of a product is smoothly finished. In addition, through inspection, quality of pipes' inner walls accords with the technical standards.

Description

technical field [0001] The invention belongs to the technical field of boiler manufacturing, and in particular relates to a device for derusting the bent pipe of the pressure part of the boiler. Background technique [0002] The conventional treatment method for cleaning the inner wall of the elbow of the pressure part of the boiler is to blow the sponge and compressed air. However, for the pipe with serious inner wall rust, the effect of rust removal cannot be achieved after the above method. Timely and repeated blowing of the sponge and compressed air , the rust is still there, it does not work, although it does not affect the operation of the boiler, but the appearance is unacceptable, if it is shipped to the customer according to this, it will cause serious economic losses, because the material of the sponge is too soft, the rust cannot be removed through the inner surface At present, electric wire brushes are used for derusting, but the wire brushes cannot bend insi...

AI Technical Summary

Problems solved by technology

[0002] The conventional treatment method for cleaning the inner wall of the elbow of the pressure part of the boiler is to blow the sponge and compressed air. However, for the pipe with serious inner wall rust, the effect of rust removal cannot be achieved after the above method. Timely and repeated blowing of the sponge and compressed air , the rust is still there, it does not work, although it does not affect the operation of the boiler, but the appearance is unacceptable, if it is shipped to the customer according to this, it will cause serious economic losses, because the material of the sponge is too soft, the rust cannot be removed through the inner surface At present, electric wire brushes are used for derusting, but the wire brushes cannot bend inside the pipe. Therefore, the development of equipment that can adapt to the hard material and can bend the pipe to remove rust is the current solution to derusting the inner wall. the puzzle

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