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Method for pipeline non-excavation restoration and reinforcement with light-cured fiber reinforced composite materials and pipeline

A technology for strengthening composite materials and composite materials, applied in the field of composite anti-corrosion and anti-seepage pipelines, can solve the problems of large curing impact, replacement of lines, and large reduction, and achieve the effect of no joint fluidity, extended service life, and rapid repair.

Active Publication Date: 2016-10-19
北京百世通管道科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of this method are: 1) the construction speed is slow; 2) the repair ability of the original pipeline is limited
The disadvantages of this method are: a) High requirements for construction technology; b) High requirements for branch pipe interface treatment; c) The selection range of resin is relatively narrow; d) The water flow needs to be replaced during construction; e) The influence of environment and temperature on curing larger
But the disadvantages of this method are: a) the cost is high; b) the section of the pipeline is reduced by 10%-30%, and the reduction is relatively large; c) the position of the working pit can only be selected at the branch pipe connection; d) the water flow needs to be replaced during construction
The disadvantages of this method are: a) only relatively straight pipelines can be repaired; b) the construction technology level and mechanical requirements are high; c) the working pit position can only be selected at the branch pipe connection; d) the construction equipment needs a large storage space; e) the water flow needs to be replaced during construction; f) the water will flow along the interlayer after the liner is damaged, the damaged point is difficult to be found, and the maintenance is difficult
[0012] To sum up, in the prior art, for the repair of pipelines, a new pipeline wall is formed on the inner wall of the original pipeline, and the formation method is either a coating method, which needs to coat the inner wall of the original pipeline layer by layer, and the construction speed is slow, or It is to coat the wall of the original pipe with resin and other adhesives to bond a new hose. It is necessary to choose a suitable resin. The technique of pasting the new pipe is complicated and is greatly affected by the ambient temperature, which is inconvenient for popularization. There is still a problem in lining the new pipe. , if the new pipe is damaged again, water will flow into the interlayer between the new and old pipes, making it difficult to find the damaged point and increase the difficulty of repairing again

Method used

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  • Method for pipeline non-excavation restoration and reinforcement with light-cured fiber reinforced composite materials and pipeline
  • Method for pipeline non-excavation restoration and reinforcement with light-cured fiber reinforced composite materials and pipeline
  • Method for pipeline non-excavation restoration and reinforcement with light-cured fiber reinforced composite materials and pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] Embodiment 1: vertical closed pasting method (see figure 2 ).

[0097] Step 1: UV-cured fiber reinforced composite materials are bonded before construction, and the moisture on the inner wall of the pipe is wiped dry with a moisture-absorbing dry cloth.

[0098] Step 2: First peel off one end of the protective film 2 on the sticking surface of the light-cured fiber reinforced composite material, and then carefully paste the peeled side on the inner wall of the pipe. Segmented vertical coating, the sequence of the first segment can start from the counterclockwise (clockwise) direction of the 5 o'clock (or 7 o'clock) position of the clock corresponding to the cross section of the pipe, wrap around the top of the pipe, and continue to attach to the joint. Seam position, tear off 3 seams of the top layer of film, and overlap the two ends of the composite material. There should be a lap length of 8-10cm or 30-50mm at the lap peak, and roll the lap seam forcefully with hand...

Embodiment 2

[0108] Embodiment 2: the law of pasting of reserved working channel (see image 3 ).

[0109] In order to prevent the newly pasted anti-corrosion reinforcement patch at the bottom of the pipeline from being damaged by transport vehicles and workers walking during the construction process, the thickness of each sheet is calculated according to the diameter and length of the pipeline under the condition that the 1-meter-wide inner wall at the bottom of the pipeline is not pasted temporarily. Length and width, paste the composite material of the set length and width on the upper peripheral wall of the pipe in an arc range above, and reserve the inner wall with a chord length of one meter at the bottom of the pipe for the time being, and then take another section The composite material with a set width is pasted on the circumferential wall of the pipe along the same arc range in the axial direction, and the inner wall of the pipe with a chord length of less than one meter is reser...

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Abstract

The invention provides a method for pipeline non-excavation restoration and reinforcement with light-cured fiber reinforced composite materials. Light-cured fiber reinforced composite sheet materials are pasted to the inner wall of a pipeline to form a sealed inner sleeve after being cured by ultraviolet irradiation. The invention further provides a pipeline to be restored and reinforced by the above method. According to the restored and reinforced pipeline, a high-strength and high-compactness sealed sleeve is rapidly formed on the inner wall of the pipeline, so that an original pipeline can be effectively restored and reinforced. According to the method, the pasting and curing of the composite materials on the pipeline wall are not influenced by the environment, and are convenient and rapid.

Description

technical field [0001] The invention relates to the technical field of pipeline repair, in particular to the technical field of non-excavation internal repair and reinforcement of large-diameter pipelines, and provides a method for non-excavation repair and reinforcement of fluid delivery pipelines using light-cured fiber-reinforced composite materials and a composite anti-corrosion and anti-seepage pipeline repaired by the method is also provided. Background technique [0002] With the rapid development of industry and urban construction, many factories and cities in my country have gradually entered the era of maintenance and management from the era of construction, especially the underground pipe network. Enter the period of high incidence of accidents. Therefore, it is urgent to carry out maintenance and repair of old pipelines in a planned way. However, pipeline maintenance and repair are often affected by various complex geographical environment factors such as traffi...

Claims

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Application Information

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IPC IPC(8): F16L55/162
CPCF16L55/162
Inventor 浦国红牛玉舒商梅荣缪宏石东生张悦
Owner 北京百世通管道科技有限公司
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