Long-life lining type prestressed concrete cylinder pipe subjected to multilayer anti-corrosive treatment

Abstract

The invention discloses a long-life lining type prestressed concrete cylinder pipe subjected to multilayer anti-corrosion treatment. The prestressed concrete cylinder pipe comprises a cylinder body part, a bellmouth steel ring and a spigot steel ring, wherein the bellmouth steel ring and the spigot steel ring are respectively arranged at two ends of the cylinder body part; the cylinder body part is provided with a steel cylinder inner wall concrete layer, a steel cylinder, a steel cylinder outer wall fiber anti-permeability and anti-cracking cement mortar protective layer and an outermost epoxy coal pitch anti-corrosive layer; the steel cylinder and the outer wall of the bellmouth steel ring are wound by prestressed steel wires; and anti-corrosive coatings are coated on the outer surface of the steel cylinder, the outer surface of the prestressed steel wires, the lower surface of the bellmouth steel ring and the upper surface of the spigot steel ring. The prestressed concrete cylinder pipe is simple in structure and anti-corrosive, and the service life of the prestressed concrete cylinder pipe can be effectively prolonged.

Description

[0001] technical field [0002] The invention relates to a prestressed concrete component, in particular to a socket steel ring and a socket steel ring at both ends of a prestressed steel cylinder concrete pipe with a thermal sprayed pure zinc coating, steel cylinder steel wires with a thermal sprayed pure zinc coating, It is a long-life multi-layer anti-corrosion treated inner-lined prestressed steel cylinder concrete pipe with a fiber anti-cracking mortar layer and an epoxy coal tar pitch anti-corrosion layer on the surface. Background technique [0003] At present, the prestressed steel cylinder concrete pipe (abbreviated as PCCP) is a new type of rigid pressure pipe. It is a high-strength concrete tube core with a steel cylinder wound with prestressed steel wire, sprayed with a cement mortar protective layer, using a steel socket ring and welded with the steel cylinder as a whole, and the socket has a grooved sealing rubber ring to form a The flexible joint of the slidi...

AI Technical Summary

Problems solved by technology

[0006] At present, the surface of the socket steel ring and socket steel ring at both ends of the domestic prestressed steel cylinder concrete pipe is only coated with simple iron red paint on the surface, and the anti-corrosion effect is not ideal. Ordinary iron red paint cannot effectively protect the surface of the socket steel ring and socket steel ring at both ends of the prestressed steel cylinder concrete pipe, which will cause the aggressive medium to corrode the prestressed steel cylinder concrete The surface of the socket steel ring and the socket steel ring at both ends of the pipe

The steel cylinder steel wire, the main component inside the prestressed steel cylinder concrete pipe, has no surface coating treatment. When the aggressive medium erodes the surface of the steel cylinder and steel wire, the steel cylinder cannot be effectively protected, which will lead to corrosion and perforation of the steel cylinder.

And the anti-seepage and anti-crack effect of the outer mortar protective layer is not ideal. When the aggressive medium erodes the surface of the prestressed steel tube concrete pipe, the ordinary mortar protective layer cannot effectively prevent seepage and anti-crack, which will lead to the erosion of the aggressive medium to the prestressed steel cylinder concrete pipe. The surface of the stressed steel cylinder concrete pipe brings hidden dangers to the safe operation of the pipeline

Images