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UHPC-SS (Ultra High Performance Concrete) composite pipeline and manufacturing method thereof

A UHPC-SS composite pipeline technology, applied in the field of UHPC-SS composite pipeline and its production, can solve the problems of poor thermal insulation performance, easy corrosion and leakage of pipelines, and high cost

Pending Publication Date: 2018-08-21
周敉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the above-mentioned defects in the prior art, the purpose of the present invention is to provide a UHPC-SS composite pipe and its manufacturing method. Stainless steel is used as the inner pipe, and UHPC concrete is used as the outer pipe. Since the temperature linear expansion coefficients of the two are very close , which solves the problems of easy corrosion and leakage of existing pipelines, high cost, high maintenance cost, and poor thermal insulation performance

Method used

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  • UHPC-SS (Ultra High Performance Concrete) composite pipeline and manufacturing method thereof
  • UHPC-SS (Ultra High Performance Concrete) composite pipeline and manufacturing method thereof
  • UHPC-SS (Ultra High Performance Concrete) composite pipeline and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0032] refer to figure 1 , a UHPC-SS composite pipeline, which consists of: a stainless steel inner pipe 1, a UHPC concrete layer 2 is poured on the outside of the stainless steel inner pipe 1, a steel mesh 3 is arranged in the UHPC concrete layer 2, and the UHPC concrete layer 2 and the stainless steel pipe 1 are provided with shear nails 4, and the shear nails 4 pass through the steel mesh 3.

[0033] The stainless steel inner pipe 1 is a 304 stainless steel pipe with a wall thickness of 1.5mm and an inner diameter of 300mm; the composite pipe is prefabricated in sections, each section length is 5m, and the two ends of the composite pipe are provided with embedded steel bars 5 for structural joints and Stainless steel inner tube 1.

[0034] refer to figure 2 , the structural joints of this embodiment adopt cast-in-place pipe joints. After the composite pipes on the installation site are positioned to a predetermined position, the pre-embedded steel bars 5 at the joints of...

Embodiment 2

[0043] refer to figure 1 , a kind of UHPC-SS composite pipeline, and its composition comprises: stainless steel pipe 1, the outside of described stainless steel pipe 1 is poured with UHPC concrete layer 2, has reinforcing mesh 3 in described UHPC concrete layer 2, described UHPC concrete layer 2 and stainless steel There are shear nails 4 between the steel pipes 1 , and the shear nails 4 pass through the reinforcement mesh 3 .

[0044] The stainless steel inner pipe 1 is a 304 stainless steel pipe with a wall thickness of 1.5mm and an inner diameter of 300mm; the composite pipe is prefabricated in sections, each section is 5m in length, and both ends of the composite pipe are provided with concave flanges for structural joints 8 or convex flange 10, the concave flange 8 and convex flange 10 are prefabricated by UHPC concrete and composite pipes, and are provided with reserved holes 11.

[0045] refer to image 3 , The structural joint of this embodiment adopts an assembled p...

Embodiment 3

[0051] refer to figure 1 , a kind of UHPC-SS composite pipeline, and its composition comprises: stainless steel pipe 1, the outside of described stainless steel pipe 1 is poured with UHPC concrete layer 2, has reinforcing mesh 3 in described UHPC concrete layer 2, described UHPC concrete layer 2 and stainless steel There are shear nails 4 between the steel pipes 1 , and the shear nails 4 pass through the reinforcement mesh 3 .

[0052] The stainless steel inner pipe 1 is a 304 stainless steel pipe with a wall thickness of 1.5mm and an inner diameter of 300mm; the composite pipe is prefabricated in sections, each section length is 5m, and the two ends of the composite pipe are provided with flanges 16 for structural joints and Stainless steel inner tube 1. refer to Figure 7 , the flange 16 is prefabricated by UHPC concrete and composite pipes, and is provided with a reserved hole 11 .

[0053] refer to Image 6 , the structural joint of this embodiment adopts the grouting ...

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Abstract

The invention discloses an UHPC-SS (Ultra High Performance Concrete) composite pipeline and a manufacturing method thereof. The UHPC-SS composite pipeline consists of a stainless steel tube, wherein casting the outer side of the stainless steel with an UHPC concrete layer; a reinforced steel network is arranged in the UHPC concrete layer; the UHPC concrete layer is prepared from the following rawmaterials in percentage by mass: 25 to 30 percent of cement, 5 to 15 percent of silicon powder, 3.5 to 13.5 percent of quartz powder, 30 to 50 percent of fine sand being 1.6 to 3.7mm in particle size,3 to 9 percent of steel fiber being 8mm in length and 3.4 to 9.4 percent of water; the raw materials are stirred and cast on the outer surface of a stainless steel inner tube; compaction is performedby adopting a compaction platform after casting; then, hot water maintenance is performed on the UHPC-SS composite pipeline in water of 80 DEG C for 3 days. Three connection manners are adopted for pipeline joints. The inner tube is made of stainless steel, and the outer tube is made of UHPC, so that the problems concerned with tendency to corrosion, poor frost resistance, poor durability and high manufacturing cost in the existing pipelines for transporting crude oil, natural gas and dangerous chemicals are solved.

Description

technical field [0001] The invention relates to the technical field of pipelines, in particular to a UHPC-SS composite pipeline and a manufacturing method thereof. Background technique [0002] The existing transportation pipelines for petroleum, gasoline-containing solvents, gasoline, and hazardous chemicals are steel pipes. Ordinary steel pipes are easy to rust, react with corrosive components contained in petroleum, and easily react with corrosive substances in the natural environment (water, Chloride ions, etc.) chemical reactions occur, resulting in short service life of the pipeline and high maintenance costs; and the insulation performance of the steel pipe itself is extremely poor, and liquids such as petroleum must be guaranteed at a certain temperature to have good flow performance. When the temperature is low, it is usually necessary to take insulation or even heating measures for steel pipes to ensure the normal operation of pipeline transportation. [0003] Ult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/153F16L58/08F16L59/02C04B28/00C04B14/48B28B21/42B28B21/60B28B1/08
CPCF16L9/153F16L58/08F16L59/02C04B14/48C04B28/00B28B1/08B28B21/42B28B21/60C04B2201/50C04B18/146C04B14/06C04B22/002C04B24/24Y02A20/20
Inventor 周敉张冠中宋建伟程江
Owner 周敉
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