阅读说明：本技术 一种fipp管道结构性修复方法 (Structural repair method for FIPP pipeline ) 是由 朱子豪 马保松 张鹏 赵雅宏 于 2020-05-26 设计创作，主要内容包括：本发明提供一种FIPP管道结构性修复方法,包括以下步骤：S1封堵待修复管道上、下游,清洗待修复管道内部,并对待修复管道的内壁进行平整度修复处理；S2对纤维增强FIPP内衬管进行预热处理使其软化,纤维增强FIPP内衬管包括两层聚氯乙烯基底以及设置于两层聚氯乙烯基底之间的纤维增强层；S3牵引纤维增强FIPP内衬管至待修复管道内部；S4封堵纤维增强FIPP内衬管的两端,向纤维增强FIPP内衬管内通入冷空气,使纤维增强FIPP内衬管膨胀直至与待修复管道内壁贴合硬化。本发明的有益效果：纤维增强FIPP内衬管具有更高的抗拉及抗剪强度,且较好地解决了传统FIPP无法应用于压力管道的问题,纤维增强FIPP内衬管具有更好的热塑性和成型后延展性,可以用于变径和错口管道的修复。(The invention provides a structural repair method of a FIPP pipeline, which comprises the following steps: s1, plugging the upstream and downstream of the pipeline to be repaired, cleaning the interior of the pipeline to be repaired, and performing flatness repairing treatment on the inner wall of the pipeline to be repaired; s2, preheating the fiber reinforced FIPP lining pipe to soften the pipe, wherein the fiber reinforced FIPP lining pipe comprises two layers of polyvinyl chloride substrates and a fiber reinforced layer arranged between the two layers of polyvinyl chloride substrates; s3, drawing the fiber reinforced FIPP lining pipe to the inside of the pipeline to be repaired; s4, plugging two ends of the fiber reinforced FIPP lining pipe, and introducing cold air into the fiber reinforced FIPP lining pipe to expand the fiber reinforced FIPP lining pipe until the fiber reinforced FIPP lining pipe is attached to and hardened on the inner wall of the pipeline to be repaired. The invention has the beneficial effects that: the fiber-reinforced FIPP lining pipe has higher tensile strength and shear strength, and better solves the problem that the traditional FIPP cannot be applied to a pressure pipeline, has better thermoplasticity and post-forming extensibility, and can be used for repairing variable-diameter and staggered pipelines.)

1. A structural repair method for a FIPP pipeline is characterized by comprising the following steps:

s1, plugging the upstream and downstream of the pipeline to be repaired, cleaning the interior of the pipeline to be repaired, and performing flatness repairing treatment on the inner wall of the pipeline to be repaired;

s2, preheating and softening a fiber reinforced FIPP lining pipe, wherein the fiber reinforced FIPP lining pipe comprises two layers of polyvinyl chloride substrates and a fiber reinforced layer arranged between the two layers of polyvinyl chloride substrates;

s3, drawing the fiber reinforced FIPP lining pipe to the interior of the pipeline to be repaired;

s4, plugging two ends of the fiber reinforced FIPP lining pipe, and introducing cold air into the fiber reinforced FIPP lining pipe to expand the fiber reinforced FIPP lining pipe until the fiber reinforced FIPP lining pipe is attached to and hardened on the inner wall of the pipeline to be repaired.

2. The structural repair method of FIPP pipe as claimed in claim 1, further comprising S5 cutting and grinding the two ends of the fiber reinforced FIPP lining pipe.

3. The structural repair method of FIPP pipe as claimed in claim 1, wherein the fiber reinforced layer in step S2 is carbon fiber or basalt fiber.

4. The FIPP pipeline structural repair method of claim 1, wherein the specific method for blocking the upstream and downstream of the pipeline to be repaired in step S1 is as follows: and respectively selecting an inspection well at the upstream and the downstream of the pipeline to be repaired, and respectively plugging the upstream and the downstream of the pipeline to be repaired by using the inflatable air bags in the two inspection wells.

5. A FIPP pipe structural repair method as claimed in claim 1, wherein: the method for cleaning the interior of the pipeline to be repaired in the step S1 is one or more of flushing cleaning, high-pressure water jet cleaning, winch cleaning, pipe cleaner cleaning and chemical cleaning.

6. The FIPP pipe structural repair method of claim 1, wherein the performing of the flatness repair process on the inner wall of the pipe to be repaired in the step S1 comprises: CCTV detection is carried out on the pipeline to be repaired, sharp, protruding and staggered parts in the pipeline to be repaired are marked, and then a milling cutter robot is used for grinding and flattening the marked parts.

7. The FIPP pipe structural repair method of claim 1, wherein the performing of the flatness repair process on the inner wall of the pipe to be repaired in the step S1 comprises: the method comprises the following steps of (1) treating a leakage place in a pipeline to be repaired by adopting a grouting plugging technology; and/or treating the deformed and collapsed part inside the pipeline to be repaired in a grouting reinforcement, cutting or steel lantern ring mode.

8. A FIPP pipe structural repair method as claimed in claim 1, wherein: and in the step S2, preheating and softening the fiber reinforced FIPP lining pipe through a steam curing vehicle.

9. A FIPP pipe structural repair method as claimed in claim 1, wherein: the step S4 specifically includes: the method comprises the steps that plugging heads are respectively inserted into two ends of a fiber reinforced FIPP lining pipe, an air inlet and an air outlet are respectively formed in the two plugging heads, the air compressor is connected with the air inlet, cold air is introduced into the fiber reinforced FIPP lining pipe through the air compressor, the fiber reinforced FIPP lining pipe is expanded until the fiber reinforced FIPP lining pipe is attached to and hardened with the inner wall of a pipeline to be repaired, the air compressor is closed, the two plugging heads are disassembled, and the cold air in the fiber reinforced FIPP lining pipe is released.

10. A FIPP pipe structural repair method as claimed in claim 1, wherein: the pipeline to be repaired is a staggered pipeline or a disjointed pipeline.

Technical Field

The invention relates to the technical field of pipeline repair, in particular to a structural repair method for a FIPP pipeline.

Background

The urban underground pipeline is a 'life line' for keeping normal life of urban residents, and the quality of the urban underground pipeline directly influences the life quality of people. With the increasing economic level of China and the accelerating urbanization process, the old pipeline is maintained and repaired in a construction mode that large excavation is not suitable, because the repair mode can greatly influence the surrounding road traffic and the normal life of residents, and a plurality of pipelines buried below the building foundation cannot be excavated, the trenchless pipeline repair method is suitable for operation. The traditional FIPP repairing method adopts a specially processed polyvinyl chloride material for hot pressing, has better thermoplasticity and ductility, has higher strength after solidification, still cannot meet the strength requirement after partial pipeline repairing, and generally cannot effectively repair a pressure pipeline with higher internal pressure.

Disclosure of Invention

In view of this, the embodiment of the present invention provides a structural repair method for FIPP pipelines.

The embodiment of the invention provides a structural repair method for an FIPP pipeline, which comprises the following steps:

s1, plugging the upstream and downstream of the pipeline to be repaired, cleaning the interior of the pipeline to be repaired, and performing flatness repairing treatment on the inner wall of the pipeline to be repaired;

s2, preheating and softening a fiber reinforced FIPP lining pipe, wherein the fiber reinforced FIPP lining pipe comprises two layers of polyvinyl chloride substrates and a fiber reinforced layer arranged between the two layers of polyvinyl chloride substrates;

s3, drawing the fiber reinforced FIPP lining pipe to the interior of the pipeline to be repaired;

s4, plugging two ends of the fiber reinforced FIPP lining pipe, and introducing cold air into the fiber reinforced FIPP lining pipe to expand the fiber reinforced FIPP lining pipe until the fiber reinforced FIPP lining pipe is attached to and hardened on the inner wall of the pipeline to be repaired.

Further, the method also comprises the step S5 of cutting and grinding the two ports of the fiber reinforced FIPP lining pipe.

Further, the fiber reinforced layer in the step S2 is carbon fiber or basalt fiber.

Further, the specific method for blocking the upstream and downstream of the pipeline to be repaired in step S1 is as follows: and respectively selecting an inspection well at the upstream and the downstream of the pipeline to be repaired, and respectively plugging the upstream and the downstream of the pipeline to be repaired by using the inflatable air bags in the two inspection wells.

Further, the method for cleaning the inside of the pipeline to be repaired in step S1 is one or more of flushing cleaning, high-pressure water jet cleaning, winch cleaning, pig cleaning and chemical cleaning.

Further, the step S1 of performing the flatness repairing process on the inner wall of the pipe to be repaired includes: CCTV detection is carried out on the pipeline to be repaired, sharp, protruding and staggered parts in the pipeline to be repaired are marked, and then a milling cutter robot is used for grinding and flattening the marked parts.

Further, the step S1 of performing the flatness repairing process on the inner wall of the pipe to be repaired includes: the method comprises the following steps of (1) treating a leakage place in a pipeline to be repaired by adopting a grouting plugging technology; and/or treating the deformed and collapsed part inside the pipeline to be repaired in a grouting reinforcement, cutting or steel lantern ring mode.

Further, the fiber reinforced FIPP lining pipe is preheated and softened by a steam curing car in the step S2.

Further, the step S4 is specifically: the method comprises the steps that plugging heads are respectively inserted into two ends of a fiber reinforced FIPP lining pipe, an air inlet and an air outlet are respectively formed in the two plugging heads, the air compressor is connected with the air inlet, cold air is introduced into the fiber reinforced FIPP lining pipe through the air compressor, the fiber reinforced FIPP lining pipe is expanded until the fiber reinforced FIPP lining pipe is attached to and hardened with the inner wall of a pipeline to be repaired, the air compressor is closed, the two plugging heads are disassembled, and the cold air in the fiber reinforced FIPP lining pipe is released.

Further, the pipeline to be repaired is a staggered pipeline or a disjointed pipeline.

The technical scheme provided by the embodiment of the invention has the following beneficial effects: according to the structural repair method for the FIPP pipeline, the fiber reinforced layer is used as the interlayer of the fiber reinforced FIPP lining pipe material, so that the tensile strength and the shear strength are higher, the problem that the traditional FIPP cannot be applied to a pressure pipeline is solved well, the fiber reinforced FIPP lining pipe has better thermoplasticity and extensibility after forming, and the method can be used for repairing variable-diameter and staggered pipelines; the fiber reinforced layer can be made of various fibers, has a wide application range and can be used for repairing pipelines with different strength requirements; the fiber-reinforced FIPP lining pipe has small resistance to water movement, and can improve the flow capacity of the pipeline.

Drawings

FIG. 1 is a schematic structural diagram of a pipe to be repaired and a fiber reinforced FIPP lining pipe in a structural repair method of a FIPP pipe according to the present invention;

FIG. 2 is a schematic view of the construction of the fiber reinforced FIPP liner tube 2 of FIG. 1;

FIG. 3 is a schematic view of cleaning the interior of a pipe to be rehabilitated;

FIG. 4 is a schematic drawing of a fiber reinforced FIPP liner tube being pulled into a pipeline to be repaired;

FIG. 5 is a schematic illustration of the stiffening of a fiber reinforced FIPP liner tube;

FIG. 6 is a schematic diagram of CCTV detection of a hardened fiber reinforced FIPP lining pipe;

FIG. 7 is a schematic view of a fiber reinforced FIPP liner tube after two port cutting and grinding processes;

FIG. 8 is a schematic illustration of a staggered pipeline after repair;

FIG. 9 is a schematic illustration of a repaired disjointed pipeline.

In the figure: 1-to-be-repaired pipeline, 2-fiber reinforced FIPP lining pipe, 3-polyvinyl chloride substrate, 4-fiber reinforced layer, 5-high-pressure cleaning vehicle, 6-upstream plug, 7-downstream plug, 8-upstream pulley bracket, 9-high-pressure cleaning spray head, 10-tractor, 11-lining hose bracket, 12-reel, 13-bracket with rotating wheel, 14-downstream pulley bracket, 15-cable, 16-air outlet, 17-plug head, 18-air inlet, 19-air compressor, 20-CCTV detection vehicle, 21-CCTV inspection robot and 22-port.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.

The embodiment of the invention provides a structural repair method for a FIPP pipeline, which comprises the following steps:

s1, plugging the upstream and downstream of the pipeline to be repaired, cleaning the interior of the pipeline to be repaired, and performing flatness repairing treatment on the inner wall of the pipeline to be repaired.

Specifically, referring to fig. 3, first, an inspection well is selected for each of the upstream and downstream of the pipeline 1 to be repaired, the upstream and downstream of the pipeline to be repaired are respectively plugged by an upstream plug 6 and a downstream plug 7 in the two inspection wells, the upstream plug 6 and the downstream plug 7 are both inflatable air bags, and accumulated water in the pipeline 1 to be repaired is pumped by a water pump. Generally, the pipeline 1 to be repaired needs to be cleaned up due to long service life, and the cleaning method can be one or more of flushing cleaning, high-pressure water jet cleaning, winch cleaning, pipe cleaner cleaning, chemical cleaning and the like. In this embodiment, treat through high-pressure sewer flushing vehicle 5 and wash pipeline 1, arrange upstream pulley support 8 in the inspection shaft of upstream, high-pressure sewer flushing vehicle 5 passes through pipe connection high-pressure cleaning shower nozzle 9, and this pipeline is walked around upstream pulley support 8 just high-pressure cleaning shower nozzle 9 gets into and carries out high pressure water jet in treating the pipeline 1 of restoreing and washs.

If the inner wall of the pipeline 1 to be repaired has the problems of unevenness and the like, the flatness repairing treatment needs to be carried out on the inner wall of the pipeline 1 to be repaired, for example, CCTV detection is carried out on the pipeline 1 to be repaired, sharp, protruding and staggered parts in the pipeline 1 to be repaired are marked, and then a milling cutter robot is used for grinding and flattening the marked parts. Further, a grouting plugging technology is adopted to treat the leakage position in the pipeline 1 to be repaired; in addition, the deformation and collapse part inside the pipeline 1 to be repaired is treated in the modes of grouting reinforcement, cutting or steel lantern ring. And laying a foundation for repairing the fiber reinforced FIPP lining pipe on the inner wall of the pipeline to be repaired 1 after the flatness repair is finished.

S2, the fiber reinforced FIPP lining pipe 2 is preheated to soften it, referring to fig. 2, the fiber reinforced FIPP lining pipe 2 includes two layers of pvc substrates and a fiber reinforced layer 4 disposed between the two layers of pvc substrates 3. The polyvinyl chloride substrate 3 and the fiber reinforced layer 4 are formed by hot pressing, and the polyvinyl chloride substrate 3 penetrates through the fiber reinforced layer 4 woven in the warp and weft directions during forming.

Specifically, the fiber reinforced FIPP lining pipe 2 is generally wound into a disc, the fiber reinforced FIPP lining pipe 2 is preheated and softened by a steam maintenance vehicle, and the wound fiber reinforced FIPP lining pipe 2 is erected in the steam maintenance vehicle arranged on the ground surface of the pipeline to be repaired and preheated. The fiber reinforced FIPP lining pipe 2 is heated and softened, and the fiber reinforced FIPP lining pipe 2 is quickly solidified after being cooled, so that the preheating of the fiber reinforced FIPP lining pipe 2 needs to be carried out immediately before site construction.

The fiber reinforced layer 4 is carbon fiber or basalt fiber. The fiber reinforced FIPP lined pipe 2 has a greater stiffness and tensile strength when carbon fibers are selected as the fiber reinforced layer 4, but is relatively less ductile and more costly. When basalt fibers are selected as the fiber reinforced layer 4, the fiber reinforced FIPP lining pipe 2 has good ductility and lower cost, has excellent characteristics of insulation, corrosion resistance and the like, and has slightly poorer tensile strength than the fiber reinforced FIPP lining pipe of the carbon fiber reinforced layer. The fiber reinforced FIPP lining pipe 2 can select proper types of fiber reinforced layers 4 according to different requirements of engineering, and has wide application range.

S3, the fiber reinforced FIPP lining pipe 2 is pulled to the interior of the pipeline 1 to be repaired.

Specifically, referring to fig. 4, a support 13 with a rotating wheel is built in an inspection well at the upstream, a support 11 with a lining hose is built above the inspection well at the upstream, the softened fiber reinforced FIPP lining pipe is led out from a reel 12 and then changes direction through the support 11 with the rotating wheel and the support 11 with the rotating wheel, the front end of the fiber reinforced FIPP lining pipe 2 is fixed by a cable 15 and is connected with a tractor 10 above the inspection well at the downstream, the cable at the inspection well at the downstream is also turned through a downstream pulley support 14, and the fiber reinforced FIPP lining pipe 2 is completely pulled into the pipeline 1 to be modified through the tractor 10.

S4, plugging two ends of the fiber reinforced FIPP lining pipe 2, and introducing cold air into the fiber reinforced FIPP lining pipe 2 to expand the fiber reinforced FIPP lining pipe 2 until the fiber reinforced FIPP lining pipe is attached to and hardened on the inner wall of the pipeline 1 to be repaired.

Specifically, referring to fig. 5, plugging heads 17 are respectively inserted into two ends of the fiber reinforced FIPP liner tube 2, an air inlet 18 and an air outlet 16 are respectively formed in the two plugging heads, an air compressor 19 is connected to the air inlet 18, cold air is introduced into the fiber reinforced FIPP liner tube 2 through the air compressor 19, the fiber reinforced FIPP liner tube 2 is expanded until the fiber reinforced FIPP liner tube is attached to and hardened on the inner wall of the pipeline 1 to be repaired, the air compressor 19 is closed, the two plugging heads 17 are detached, and the cold air in the fiber reinforced FIPP liner tube 2 is released. The fiber reinforced FIPP lining pipe 2 is tightly attached to the pipeline 1 to be repaired after being hardened, and bears the pressure inside and outside the pipeline 1 to be repaired together.

S5, the two ports 22 of the fiber reinforced FIPP liner tube 2 are cut and ground.

Specifically, referring to fig. 6 and 7, the plugging heads 17 at the two ends of the fiber reinforced FIPP lining pipe 2 are removed, the CCTV inspection vehicle 20 is used to cooperate with the CCTV inspection robot 21 to inspect the hardened fiber reinforced FIPP lining pipe 2, the smoothness of the fiber reinforced FIPP lining pipe 2 and the good adhesion between the fiber reinforced FIPP lining pipe and the pipeline 1 to be repaired are confirmed, and then the two ports 22 of the fiber reinforced FIPP lining pipe 2 are cut, ground, and the like.

In addition, after the repair is completed, the fiber reinforced FIPP lining pipe 2 can be subjected to overall pressure test by adopting a closed water-weight pressure test to verify the performance of the fiber reinforced FIPP lining pipe 2, the upstream plug 6 and the downstream plug 7 of the pipeline are removed after the pressure test is qualified, water supply is recovered, and the construction is completed.

It should be noted that, the pipe 1 to be repaired is a staggered pipe or a disjointed pipe, and the fiber reinforced FIPP lining pipe 2 has good thermoplasticity and post-forming extensibility, so that the pipe can be effectively repaired for an existing pipe with a staggered and disjointed pipe, such as the repaired staggered pipe shown in fig. 8 and the repaired disjointed pipe shown in fig. 9.

Referring to fig. 1, according to the FIPP pipeline structural repair method of the present invention, after the pipeline 1 to be repaired is repaired, the fiber reinforced FIPP lining pipe 2 does not pollute the water body and the surrounding environment, and can prevent the inner wall of the pipeline from corroding; the fiber-reinforced FIPP lining pipe 2 can also effectively prevent scaling in the pipeline, has small resistance to water motion, and can improve the overflowing capacity of the pipeline. The repairing method is convenient and quick to construct, has low requirement on operators, is easy to realize and can reduce the labor cost.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.