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Shape memory composition patch device for pipe connection

A memory alloy and memory technology, which is applied in the field of repairing pipeline structures and construction using shape memory materials, can solve problems such as unsolved problems, and achieve the effects of reducing the loss of transmission pressure head, simple space structure, and reliable sealing.

Inactive Publication Date: 2002-07-17
宁波天合功能材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the connection joint of the construction pipeline in this scheme has been developed for a long time, it has not yet been solved.

Method used

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  • Shape memory composition patch device for pipe connection
  • Shape memory composition patch device for pipe connection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0011] The overhead high-pressure corrosion-resistant pipeline of Daqing Oil Refinery, the outer layer is G10, Φ156×3 carbon steel pipe, and the inner layer is 304 stainless steel pipe Φ150×2. Due to local leakage, cut off 10m in the middle. Make the stainless steel pipe at the cutting point of the original pipeline 30mm longer than the outer pipe, and put 100mm long iron-based shape memory alloy SM6 pipe sleeves on both sides. Take a new double-layer composite pipe 10 meters long. The carbon steel pipes at both ends are 30mm shorter than the stainless steel pipes. First weld the connecting stainless steel liner to the stainless steel liner on the left and right sides. Take two 59mm long, Φ156×3 G10 steel pipes, cut them in half axially, and make two sets of valve tubes. Put them on the welds on both sides respectively, and apply the sealing packing paste copper phosphate. Move memory alloy tubes to the position of valve tubes respectively, heat at 300°C for 3 minutes, shr...

Embodiment 3

[0013] In addition to using the shape memory joint to connect gas pipelines, it can also be used to connect water pipelines. Shanghai stainless steel pipe 0 Cr18 Ni8 Ti, Φ50×0.5, lined with PPR Φ49×4 high-rise water supply main pipe, which needs to withstand a pressure of 5MPa. Due to serving in a vibrating working environment, the original mechanical ferrule-type interface seepage occurred after 4 hours of operation. To connect the above-mentioned pipelines with the patching device of the present invention, first process the joints, grind away a little stainless steel, make the PPR liner protrude 3mm, insert the shape memory stainless steel sleeve, the length is 70mmΦ56×3, and control its inner diameter Φ50 positive tolerance. Use a fusion welder to weld the PPR pipe. In order to fill the excess space of the weld, wind the glass cloth tape so that the outer edge of the wound part is flush with the outer contour of the stainless steel pipe. Apply sealing packing fluororubber...

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Abstract

The present invention relates to a method for connecting and repairing pipeline, it is a shape memory combined completentary opening for pipe connection, includign base pipe, inter-penetration lining pipe, connecting lining pipe, lining pipe weld seam, connecting pipe, filling ring, sealing filling material and shape memory sleeve. The inter-penetration lining pipe and connecting lining pie are combined together by means of lining pipe weld seam, the filling ring is placed in the ring groove between the base pipe and connecting pipe, the filling ring is fixed from exterior by using sleeve, and the base pipe and connecting pipe and connected together. It is specially applicable for repairing gas pipeline.

Description

Technical field [0001] The invention relates to a pipeline connection and repair method, in particular to a repair pipeline structure and construction technology using shape memory materials. Background technique [0002] The natural gas and gas pipelines in existing oil fields and cities have early leakage due to transportation gas and geological corrosion, which not only directly affects the gas supply, but also pollutes the atmosphere, and often causes poisoning, explosions or fires, which in turn leads to traffic jams and building paralysis Collapse, personal injury and other accidents. This type of steel pipe pipeline needs to be replaced after about 10 years. If all pipelines are updated and laid, including design, land occupation, trenching, pipe burial, etc., various materials and civil construction costs will be huge, as high as 150,000 yuan per kilometer. If the pipeline passes through buildings or key markets, the pipeline can only be constructed around the grou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/16
Inventor 刘文西刘洁
Owner 宁波天合功能材料有限公司
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