Pipeline and preparation method thereof

Abstract

The invention relates to the field of pipelines for delivering fluid such as water and oil and discloses a pipeline and a preparation method thereof. The pipeline comprises a concrete pipe (1) and a metal pipe (2) arranged outside the concrete pipe (1) in a sleeving mode. A radial gap is formed between the concrete pipe (1) and the metal pipe (2). The two ends of the concrete pipe (1) and the twoends of the metal pipe (2) are connected to form a cavity. A grouting layer (3) is formed in the cavity. The concrete pipe (1) is squeezed by the grouting layer (3) and the metal pipe (2) to form circumferential prepressing stress. The pipeline provided by the invention can bear high internal pressure and high external pressure, has good permeability resistance and durability and is low in manufacturing cost.

Description

technical field [0001] The invention relates to a pipeline and a preparation method thereof. The pipeline is used for transporting fluids such as water and oil. Background technique [0002] Pipes are widely used, mainly in water supply, drainage, heat supply, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial devices. Taking the water pipeline as an example, the water pipeline is to send water from the reservoir, the surge chamber, the forebay to the turbine or to the high place by the water pump, and the water pipeline buried at the bottom of the earth-rock dam body, under the ground or in the open air. It can be used for irrigation, hydroelectric power generation, urban water supply, drainage, sediment discharge, emptying reservoirs, construction diversion and spillway to release floods, etc. [0003] In long-distance, high-flow water diversion projects, the selection of pipe materials is...

AI Technical Summary

Problems solved by technology

However, these pipes have their own defects, which are as follows: steel pipes have high cost, poor external pressure resistance, and complicated construction procedures; ductile iron pipes have relatively high cost per unit length, complicated connection methods, and are bulky and small in diameter. ; Sand-filled glass steel pipes are flexible pipes with poor external pressure resistance, high requirements for trench backfill, and limited dosage and use; High internal water pressure and external load, because the outside of the prestressed steel wire is protected by dry mortar, the corrosion resistance is relatively poor, the failure of the pipe burst occurs frequently, and the durability of the pipe is poor

[0004] Therefore, it is urgent to develop a pipeline that can withstand high internal pressure and high external pressure, has good durability and low cost, so as to overcome the difficult problem of pipeline selection in current engineering design and construction.

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