Novel anti-seepage PCCP (Prestressed Concrete Cylinder Pipe) and production method

Abstract

The invention discloses a novel anti-seepage PCCP (Prestressed Concrete Cylinder Pipe) and a production method. The novel anti-seepage PCCP is characterized in that the surface of the novel anti-seepage PCCP is formed by coating a flat, dense and smooth cement slurry anti-seepage protection layer on the surface of the outer layer of a traditional PCCP again. The novel anti-seepage PCCP and the production method, disclosed by the invention have the beneficial effects that the production and processing method is simple and convenient, the surface of the produced novel anti-seepage PCCP is smooth, the density of the protection layer of the surface layer is high, micro capillary channels which are mutually communicated are not formed in an outer mortar protection layer, the waterproof performance is very high, a pipe core of a steel cylinder and a prestressed steel wire can be effectively prevented from being corroded by an external corrosion environment, the service life of a pipeline is prolonged, and an accident caused as the pipeline is corroded can be prevented from happening.

Description

Technical field [0001] The invention relates to a power plant cooling water pressure pipe including an industrial pressure pipe, in particular to a new anti-seepage PCCP prestressed steel cylinder concrete pipe and a production method in which cement slurry is coated on the surface of the outer cement protective layer of the PCCP pipe and smoothed. technical background [0002] The production process of the existing PCCP water pipeline outer protective layer is that the finished product is finished after the pipeline after the wire wrapping is sprayed with mortar. Although the mortar sprayed at a speed of 37 meters per second has strong adhesion, the sand particles adhere to the outer wall of the barrel in a state of collision with each other during high-speed spraying, making the outer mortar protective layer inevitable. Interconnected fine capillary channels are formed. These fine capillary channels have certain water permeability, which makes the outer wall of the steel c...

AI Technical Summary

Problems solved by technology

Although the mortar sprayed at a speed of 37 meters per second has strong adhesion, the sand particles adhere to the outer wall of the barrel in a state of mutual collision during high-speed spraying, making the outer mortar protective layer inevitable. Interconnected fine capillary channels are formed. These fine capillary channels have a certain degree of water permeability, so that the outer wall of the steel cylinder of the pipeline and the steel wire wrapped around the outer wall of the steel cylinder are extremely vulnerable to corrosion and damage from the external environment, resulting in accidents such as pipe bursts.

[0003] For example: in the PCCP pipeline project of cooling circulating water in a large power plant, because the pipeline runs under high temperature and high pressure, and the outside of the pipeline is often in a high temperature and high humidity environment, the existing PCCP pipeline is extremely vulnerable to environmental corrosion damage , leading to a major accident