Pipeline and assembly thereof

Abstract

The invention relates to the field of pipelines used for conveying of water, oil and the like, and discloses a pipeline. The pipeline comprises a metal cylinder (2) and a concrete cylinder (6) arranged outside the metal cylinder (2) in a sleeving manner. An elastic cushion layer (3) is arranged between the metal cylinder (2) and the concrete cylinder (6). The pipeline can bear high inner pressureand high outer pressure, good permeability resistance and durability are achieved, and the cost is low.

Description

technical field [0001] The invention relates to a pipeline and its components, which are 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 very important. It ...

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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