Prestressed large-scale ribbed steel pipe

Abstract

The invention relates to a prestressed large-scale ribbed steel pipe, which consists of a steel pipe body, a prestressed steel wire and a protective layer. The protective layer is fixedly arranged on the outer wall and the inner wall of the steel pipe body, the prestressed steel wire is wound on the outer wall of the steel pipe body in the protective layer, and steel ribs are coaxially and fixedly arranged on the inner wall of the steel pipe body in the protective layer. The prestressed large-scale ribbed steel pipe has the advantages of simple structure, scientific and reasonable design, thinner steel pipe wall, low consumption of steel, lower cost, longer service life and higher anti-corrosion performance.

Description

technical field [0001] The invention relates to a steel pipe, in particular to a prestressed large ribbed steel pipe. Background technique [0002] Steel pipes are generally used when the geographical environment does not allow grooving, the construction environment requires less noise and does not affect traffic or the ground is easy to settle. At present, the steel pipes used for conveying pressure fluids are mainly welded with L175-L555 steel plates (tensile strength is 175-555MPa). Due to the low yield strength of these common steels, when manufacturing steel pipes with high compressive strength, The wall design of the steel pipe is very thick. Taking the DN3600 pipeline as an example, the working conditions are as follows: the working pressure is 0.6MPa, the depth of the soil cover is 2m, the thickness of the steel plate required for ordinary steel pipes is at least 32mm, and the amount of steel per linear meter of the pipeline is 2898Kg. The purpose of pressure fluid...

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Problems solved by technology

Taking the DN3600 pipeline as an example, the working conditions are: working pressure 0.6MPa, soil covering depth 2m, the steel plate thickness required for ordinary steel pipes is at least 32mm, and the steel consumption per linear meter of pipeline is 2898Kg. The purpose of the pressure fluid, but there are the following problems: 1. The thickening of the steel pipe wall leads to an increase in the amount of steel used to produce each steel pipe, and the increase in raw material costs; 2. The thickening of the steel pipe wall leads to an increase in the weight of the steel pipe, and transportation And the difficulty of construction is increasing; 3. At present, the outer wall of the steel pipe generally has a conventional protective layer, such as epoxy coal tar pitch or cement mortar, etc., which has poor anti-corrosion performance, which directly leads to a shorter service life of the steel pipe and increases the cost of replacement; in addition, steel It is a product with high energy consumption and high emissions. The increase in usage will lead to a large consumption of energy, especially the consumption of non-renewable resources, and it does not conform to the environmental protection policy of energy conservation and emission reduction advocated by the state.

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