CN113187983B - Non-excavation local repairing method for heating type pipeline - Google Patents
Non-excavation local repairing method for heating type pipeline Download PDFInfo
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- CN113187983B CN113187983B CN202110559216.1A CN202110559216A CN113187983B CN 113187983 B CN113187983 B CN 113187983B CN 202110559216 A CN202110559216 A CN 202110559216A CN 113187983 B CN113187983 B CN 113187983B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
- F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
- F16L55/1654—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section and being inflated
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Abstract
The scheme belongs to the technical field of trenchless repair of pipelines, and particularly relates to a trenchless local repair method for a heating type pipeline. The method comprises the following steps: sleeving a thermoplastic pipe which is used for repairing the pipeline and becomes soft after being heated on the repairing device; placing the repairing device into a to-be-repaired position of the pipeline in the pipeline; heating the thermoplastic pipe to soften the material; then the repairing device expands to make the thermoplastic pipe closely attached to the inner wall of the pipeline to be repaired; and cooling and solidifying the thermoplastic pipe after the inner wall of the pipeline to be repaired is tightly attached to finish the repair. This scheme is earlier with thermoplastic type tubular product heat softening, inflation laminating, then normal atmospheric temperature cooling solidification shaping, and this kind of fashioned mode of thermoplastic makes the laminating that thermoplastic type tubular product can be inseparable on the pipeline, and is more firm difficult for dropping, and repair effect is good.
Description
Technical Field
The scheme belongs to the technical field of trenchless repair of pipelines, and particularly relates to a trenchless local repair method for a heating type pipeline.
Background
The urban underground pipeline is an urban drainage system, is an engineering facility system for treating and removing urban sewage and rainwater, and is a component of urban public facilities. Along with the delay drainage pipe of live time all can appear ageing or pipeline wall of different degree and break, pipeline interface fracture takes place to subside the scheduling problem that collapses, can influence city drainage after the pipeline damage, needs in time to restore.
When the pipelines are damaged and collapsed in a large area, all the pipelines are generally required to be excavated and replaced, and the excavation type operation mode has large construction quantity and high cost, and the road surface is required to be excavated, so that the ground traffic is influenced; the non-excavation mode has the advantages of no need of excavating a road surface, small construction amount and no influence on ground traffic.
Chinese patent publication No. CN101509589, which discloses a method for repairing a pipeline, wherein a new pipe is built in a damaged pipeline to repair the pipeline, and the method and steps for repairing the pipeline comprise dredging; selecting a new pipe to repair the specification of the pipeline; cutting the new pipe repair pipeline into short sections to manufacture short pipe repair units; respectively processing the front end face and the rear end face of each short pipe repairing unit into connecting ports which can be connected with each other; a sealing ring is arranged at one end of the short pipe repairing unit; sending the short pipe repairing units into the underground, and sequentially jacking the short pipe repairing units connected with each other into the damaged pipeline by using a press machine; and filling materials are injected between the damaged pipeline and the short pipe repairing unit.
In the above-mentioned patent, adopt the new pipe to restore the pipeline damage position, the new pipe is protruding in original pipeline after the restoration is accomplished, and the pipe wall is thicker, and pipeline cross sectional area loss is big, and the pipeline is in normal drainage use, and water impact is on the new pipe, and the new pipe can remove along its length direction in the pipeline under long-term water impact, leaves original position then, causes the restoration inefficacy.
Disclosure of Invention
The scheme provides a non-excavation local repairing method for a heating type pipeline, and aims to solve the problem that the pipeline repairing fails due to the method.
In order to achieve the above object, the present invention provides a trenchless local repairing method for a heating type pipeline,
the method comprises the following steps:
the method comprises the following steps: sleeving a thermoplastic pipe which is used for repairing the pipeline and becomes soft after being heated on the repairing device;
step two: placing the repairing device into a to-be-repaired position of the pipeline in the pipeline;
step three: heating the thermoplastic pipe to soften the material;
step four: then operating the repairing device to expand to enable the thermoplastic pipe to be tightly attached to the inner wall of the pipeline to be repaired;
step five: and cooling, solidifying and forming the thermoplastic pipe after the inner wall of the pipeline to be repaired is tightly attached to finish repairing.
Further, in the first step, before repairing the pipeline, dredging and pretreating the pipeline to be repaired are carried out, and a pipeline repairing scheme is formulated. The dredging and pretreatment can make the pipeline repair more convenient, the effect is better, and the pipeline repair efficiency can be higher by formulating the pipeline repair scheme.
Further, in the second step, the repairing device is pulled into the pipeline by a pipeline CCTV robot. The pipeline CCTV robot can position the broken part of the pipeline, and is more accurate and convenient in repair.
Further, in the third step, steam is introduced to heat the thermoplastic pipe. The steam heating mode can make the thermoplastic pipe reach the effect of softening and can not influence the material property of thermoplastic pipe again.
Further, in the third step, the time for introducing the steam is half an hour. Half an hour can make the thermoplastic type tubular product and the pipeline part of waiting to mend can reach the softening standard, more firm when mending.
Further, in the fifth step, normal-temperature cold air is introduced to cool and solidify the thermoplastic pipe. The cold air of normal atmospheric temperature can make the effect of thermoplastic type tubular product cooling solidification better.
Further, in the fifth step, the time for introducing the cold air at the normal temperature is fifteen minutes. Fifteen minutes can make the thermoplastic type tubular product and the pipeline part of waiting to mend can reach the standard of cooling solidification, and is more firm when the restoration.
Further, in the fifth step, after the pipeline is repaired, the pipeline CCTV robot can be used for detecting the jointing condition of the pipeline, the jointing tightness is found to be poor, and the operations from the third step to the fifth step can be repeated for reworking until the pipeline is successfully repaired. Ensuring good repairing effect.
Further, in the fifth step, after the repair is completed, the repair device is separated from the material for repairing the pipeline, and the repair device is taken out of the pipeline. The timely use of the repaired water pipe is not hindered.
The beneficial effect of this scheme:
1. this scheme is earlier with thermoplastic type tubular product heat softening then normal atmospheric temperature air cooling solidification shaping, and this kind of fashioned mode of thermoplastic makes the laminating that thermoplastic type tubular product can be inseparable on the pipeline, and is more firm difficult for dropping, and repair effect is good.
2. The CCTV robot can be used for positioning before and inspecting after repairing, so that the repairing effect is ensured.
3. Steam heating and cold air cooling solidification are introduced, the properties of the thermoplastic pipe are not generated in the whole process, no pollution is caused to the environment, and the environment-friendly effect is good.
Drawings
FIG. 1 is a schematic diagram of a repairing process according to an embodiment of the present invention.
FIG. 2 is a schematic uninflated structural view of a repair balloon in accordance with an embodiment of the present invention.
FIG. 3 is a schematic representation of an uninflated configuration of a repair balloon in accordance with an embodiment of the present invention.
Fig. 4 is a left side view of an embodiment of the present invention.
Detailed Description
The following is further detailed by the specific embodiments:
the reference numbers in the drawings of the specification include: the device comprises a main body framework 1, supporting rollers 2, a closed air bag 3, a repairing air bag 4, a pipeline 5 to be repaired, a composite plastic pipe 6, a vent pipeline 7, a steam pipeline 8, a pipeline CCTV robot 9, an overpressure relief valve 10 and a tool car 11.
The embodiment is basically as shown in the attached figure 1:
the trenchless local repairing method for the heating type pipeline comprises the following steps:
the method comprises the following steps: pipeline pretreatment:
before repairing the pipeline, dredging and pretreating the pipeline 5 to be repaired to make a pipeline repairing scheme. The method has the advantages that the repairing effect is prevented from being influenced by sludge on the pipeline, then the pipeline repairing scheme is formulated, and the diameter of the pipeline and the diameter of the thermoplastic pipe and the repairing inlet are determined.
Step two: preparation work
The method comprises the steps of sleeving a preheated composite plastic pipe 6 on the surface of a repair air bag 4 on the ground, and then connecting a main body framework 1 of the repair equipment with a pipeline CCTV robot 9 through a traction rope. Then the pipeline is connected with a tool car 11 which stops outside the pipeline, and the tool car 11 is provided with equipment such as an electric heating boiler, a generator, an air compressor and the like to provide heat source and air for the repairing equipment.
Step three: pipe positioning
The pipeline CCTV robot 9 and the repairing device are both sent into the pipeline, then the pipeline CCTV robot 9 positions the pipeline 5 to be repaired, and the repairing device is positioned to the position of the pipeline to be repaired under the guidance of the pipeline CCTV robot 9.
Step four: softening by heating
The closed air bags 3 at the two ends are inflated through the ventilation pipeline 7, so that the closed air bags 3 and the pipeline 5 to be repaired are sealed to form a local heating bin, then steam is introduced into the heating bin through the ventilation pipeline 8, the steam heats the composite plastic pipe 6 and the pipeline 5 to be repaired, and the steam is introduced for half an hour to enable the composite plastic pipe 6 and the local part of the pipeline 5 to be repaired to reach the softening standard.
Fifthly, repairing the pipeline
The repairing air bag 4 is inflated through the ventilation pipeline 7, so that the repairing air bag 4 is expanded to tightly attach the heated and softened composite plastic pipe 6 to the to-be-repaired position of the heated and softened pipeline.
Step six: cooling and solidifying
And then switching the steam inlet pipeline 8 to introduce cold air at normal temperature for fifteen minutes, so that the thermoplastic-molded composite plastic pipe 6 is cooled, solidified and shaped.
Step seven: pressure relief
After the pipeline is repaired, the closed air bag 3 and the repair air bag 4 are decompressed, and the device is pulled out of the pipeline after decompression.
Step eight: detection of
The pipeline CCTV robot 9 detects the jointing condition of the pipeline, obviously shows that the cooled and solidified thermoplastic forming pipe is tightly jointed with the original pipeline without gaps, and if the pipe is a corrugated pipe, the corrugated shape can be seen through the thermoplastic forming pipe, namely the successful repair is shown. If the fit tightness is found to be not good, the operations of the third step to the seventh step can be repeated, and reworking can be carried out again until success is achieved.
As shown in figures 2-4:
the scheme discloses a device for realizing the method, which comprises the following steps:
add hot type pipeline and use local patching device of non-excavation, including main part skeleton 1, gasbag, pipeline and supporting roller 2 fixed mounting are on main part skeleton 1, and the gasbag is including closing gasbag 3 and repairing gasbag 4, and closing gasbag 3 is equipped with two, and two closing gasbags 3 are established respectively at repairing gasbag 4 both ends. The material of the air bag is high temperature resistant, is not easy to break under the high temperature environment, and has long service life.
The closed air bag 3 forms a closed space at the pipeline to be repaired after being inflated, and the space is heated and softened for repairing the pipeline material after being inflated with steam.
The composite plastic pipe 6 is sleeved on the repairing air bag 4, the composite plastic pipe 6 is high in fitting degree with the original pipe after being thermoplastic, and meanwhile, the composite plastic pipe is firmer and more reliable and has the advantages of no falling, corrosion resistance, long service life, corrosion resistance and the like.
The repairing air bag 4 has two functions, namely, the repairing air bag is used as a carrier for the composite plastic pipe 6 to enter the pipeline 5 to be repaired, and the air bag is pressurized and inflated to expand after the composite plastic pipe 6 is heated and softened, so that the composite plastic pipe 6 which is heated and softened is tightly attached to the pipeline to be repaired.
An overpressure relief valve 10 is arranged on the air bag. When the pressure in the air bag exceeds a preset value, the pressure release valve of the air bag can be opened, and the air bag is prevented from bursting. The diameter of the main framework 1 part for supporting the air bag can be adjusted. When pipelines with different diameters need to be repaired, the diameter of the supporting air bag part of the main body framework 1 can be adjusted, so that the composite plastic pipe 6 can be sleeved in the repairing air bag 4.
The pipeline comprises a vent pipe line 7 for ventilation and a steam pipeline 8 for steam ventilation, the vent pipe lines 7 are two, one vent pipe line 7 is communicated with the closed air bag 3, the other vent pipe line 7 is communicated with the repair air bag 4, the steam pipeline 8 is fixed on the main body framework 1, the outlet of the steam pipeline 8 is positioned between the closed air bag 3, the composite plastic pipe 6 and a cavity formed by the pipeline 5 to be repaired, and the composite plastic pipe 6 is sleeved on the repair air bag 4.
The pipeline is a channel externally connected with the local repairing device, the device is connected with a tool car 11 special for external heating and air filling through a high-pressure hose, and the tool car 11 is provided with an electric heating boiler, a generator, an air compressor and other equipment to provide heat source and air for the pipeline thermoplastic forming lining local repairing equipment.
The pipeline CCTV robot 9 is connected with the main body framework 1, the pipeline CCTV robot 9 can pull the repairing device into the pipeline, and position and detect the pipeline fitting condition.
The four supporting rollers 2 are respectively arranged at the front end of the main body framework 1 and the rear end of the main body framework 1. So that the main body frame 1 is more stable when driving. The support roller 2 is foldable. The support of the support rollers 2 can be adjusted according to the diameter of the pipe to ensure the smooth operation of the equipment in the pipe.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. The non-excavation local repair method for the heating type pipeline is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: sleeving a thermoplastic pipe which is used for repairing the pipeline and becomes soft after being heated on the repairing device;
step two: placing the repairing device into a to-be-repaired position of the pipeline in the pipeline;
step three: operating the repairing device, inflating the closed air bags (3) at two ends through the air ventilation pipeline (7) to seal the space between the closed air bags (3) and the pipeline (5) to be repaired to form a local heating bin, and introducing steam into the local heating bin to heat the thermoplastic pipe and the pipeline to be repaired by the steam and reach the softening standard;
step four: then operating the repairing device to make the thermoplastic pipe closely attached to the inner wall of the pipeline to be repaired;
step five: cooling and solidifying the thermoplastic pipe after the inner wall of the pipeline to be repaired is tightly attached to finish the repair;
also included are means for implementing the method: comprises a main body framework (1), an expansion part and a supporting roller (2); the expansion part and the supporting roller (2) are both arranged on the main body framework (1), and the expansion part is communicated with a steam pipeline (8) for introducing steam and normal warm and cold air;
the expansion part comprises two closed air bags (3) and two repairing air bags (4), wherein the two closed air bags (3) are respectively arranged at two ends of the repairing air bag (4); a composite plastic pipe (6) is sleeved on the repair air bag (4), and the composite plastic pipe (6) is softened after being heated and then is cooled, cured and shaped;
the air-permeable pipe is characterized by further comprising two air-permeable pipes (7) used for pressurization and ventilation, wherein one air-permeable pipe (7) is communicated with the closed air bag (3), the other air-permeable pipe (7) is communicated with the repair air bag (4), the air-permeable pipe (8) is arranged on any one closed air bag (3), the air-permeable pipe (8) is fixed on the main body framework (1), and the outlet of the air-permeable pipe (8) is located between the closed air bag (3), the composite plastic pipe (6) and a cavity formed by the pipeline (5) to be repaired.
2. The trenchless partial repair method for a heated pipe as claimed in claim 1, wherein: in the first step, before repairing the pipeline, dredging and preprocessing are carried out on the pipeline to be repaired, and a pipeline repairing scheme is formulated.
3. The trenchless partial repair method for a heated pipe as claimed in claim 1, wherein: in the second step, the repairing device is pulled into the pipeline by a pipeline CCTV robot.
4. The trenchless partial repair method for a heated pipe as claimed in claim 1, wherein: and in the third step, steam is introduced to heat the thermoplastic pipe.
5. The trenchless partial repair method for a heated pipe as claimed in claim 4, wherein: and in the third step, the time for introducing the steam is half an hour.
6. The trenchless partial repair method for a heated pipe as claimed in claim 1, wherein: and step five, introducing cold air at normal temperature to cool and solidify the thermoplastic pipe.
7. The trenchless partial repair method for a heated pipe as claimed in claim 6, wherein: and in the fifth step, the time for introducing the cold air at the normal temperature is fifteen minutes.
8. A trenchless partial repair method for a heated pipe as claimed in claim 3 wherein: in the fifth step, after the pipeline is repaired, the pipeline CCTV robot is used for detecting the jointing condition of the pipeline, the jointing tightness is found to be poor, the operations from the third step to the fifth step are repeated, and the operations are repeated until the jointing is successful.
9. A trenchless partial repair method for a heated pipe as claimed in claim 3 wherein: and in the fifth step, after the repairing is finished, separating the repairing device from the material for repairing the pipeline, and taking the repairing device out of the pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110559216.1A CN113187983B (en) | 2021-05-21 | 2021-05-21 | Non-excavation local repairing method for heating type pipeline |
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| CN202110559216.1A CN113187983B (en) | 2021-05-21 | 2021-05-21 | Non-excavation local repairing method for heating type pipeline |
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| CN113187983B true CN113187983B (en) | 2022-08-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114458856A (en) * | 2021-12-16 | 2022-05-10 | 堡森(上海)新材料科技有限公司 | Device and method for repairing water-carrying structure of in-service pipeline |
| CN115405802B (en) * | 2022-09-01 | 2024-05-24 | 中国电建集团贵阳勘测设计研究院有限公司 | CIPP lined pipe air tightness detection device and detection method thereof |
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| JP5815938B2 (en) * | 2010-12-09 | 2015-11-17 | 芦森工業株式会社 | Pipeline lining method |
| CN210003928U (en) * | 2019-04-04 | 2020-01-31 | 合肥睿思水务科技有限责任公司 | Pre-buried device for agricultural irrigation water pipes |
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| EP0449701A1 (en) * | 1990-03-26 | 1991-10-02 | Tsutsunaka Plastic Kogyo Kabushiki Kaisha | Polyvinyl chloride pipe for the inner lining of existing pipes |
| EP0477081A2 (en) * | 1990-09-18 | 1992-03-25 | Tsutsunaka Plastic Kogyo Kabushiki Kaisha | Method for producing a resin pipe for use as the inner lining of existing pipes |
| CN101634374A (en) * | 2009-08-21 | 2010-01-27 | 管丽环境技术(上海)有限公司 | Underground pipeline excavation-restoration construction method of stage temperature-control field pipe-making |
| CN209557882U (en) * | 2018-11-14 | 2019-10-29 | 北京北排建设有限公司 | A kind of thermoplastic shaping repairs the device of underground piping |
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