CN111649188B - Pipe expanding device and process for hose for trenchless restoration - Google Patents

Pipe expanding device and process for hose for trenchless restoration Download PDF

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Publication number
CN111649188B
CN111649188B CN202010478999.6A CN202010478999A CN111649188B CN 111649188 B CN111649188 B CN 111649188B CN 202010478999 A CN202010478999 A CN 202010478999A CN 111649188 B CN111649188 B CN 111649188B
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China
Prior art keywords
hose
repair
ball
sealing ball
pipe expanding
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CN202010478999.6A
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Chinese (zh)
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CN111649188A (en
Inventor
卞冬明
黄裕中
张小红
王金马
陈军
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Zhong Yu Hoses Technology Co ltd
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Zhong Yu Hoses Technology Co ltd
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Publication of CN111649188A publication Critical patent/CN111649188A/en
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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
    • F16L55/163—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a ring, a band or a sleeve being pressed against the inner surface of the pipe
    • 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
    • F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
    • F16L55/28—Constructional aspects
    • F16L55/30—Constructional aspects of the propulsion means, e.g. towed by cables
    • F16L55/38—Constructional aspects of the propulsion means, e.g. towed by cables driven by fluid pressure
    • 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
    • F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
    • F16L55/28—Constructional aspects
    • F16L55/40—Constructional aspects of the body
    • 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
    • F16L2101/00—Uses or applications of pigs or moles
    • F16L2101/30—Inspecting, measuring or testing
    • 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
    • F16L2101/00—Uses or applications of pigs or moles
    • F16L2101/60—Stopping leaks

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pipe Accessories (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The invention discloses a pipe expanding device and a pipe expanding process of a hose for trenchless repair, wherein the pipe expanding device comprises a pre-opening ball and a sealing ball, the pre-opening ball and the sealing ball are two independent balls, the sealing ball comprises a central layer and an elastic layer, and the elastic layer is wrapped on the central layer. The invention has the beneficial effects that: through the pipe expansion device adopting the pre-opening ball and the sealing ball, the pre-opening ball firstly supports the large bending and large folding of the hose for repair, so that the deformation of the hose for repair is reduced, and then the sealing ball with the diameter larger than the diameter of the hose for repair still has the folding and concave places to be eliminated, so that the pipe expansion effect is achieved, the elastic layer of the sealing ball plays a protection effect on the hose for repair, the hose cannot be broken, the design requirement is met, and the pipe expansion efficiency is high.

Description

Pipe expanding device and process for hose for trenchless restoration
Technical Field
The invention relates to the technical field of repairing of lined flexible composite pipelines, in particular to a pipe expanding device and a process of a hose for trenchless repairing.
Background
The trenchless pipeline repairing technology is a revolutionary, approved and multidisciplinary mutually-matched high-tech technology and mainly has the following advantages: 1) the method does not need to be excavated, and is an ideal method for repairing the pipeline; 2) the field construction period is short and is generally not more than 24 hours; 3) the influence on traffic is small, only a single-row lane is occupied, and the distance between two inspection wells is short; 4) the method has wide application range, can be used for repairing pipelines (concrete pipes, cement pipes, steel pipes, PVC pipes and the like) of any pipe, and can meet the reconstruction requirements of pipelines for conveying different media (oil, gas, water, chemical raw materials and the like) and pipelines with different shapes; 5) the lining flexible composite pipe has the characteristics of long service life, abrasion resistance, corrosion resistance, high strength and the like.
The common trenchless pipeline repairing method is characterized in that a hose for repairing is inserted into a pipeline, two ends of the hose are plugged, then pressurization is carried out at one end, and the hose is changed from a U shape to an O shape and is attached to an original pipeline. However, in the actual pressurizing process, the two side ends of the hose form an O-shape, and the middle section of the hose is still in a U-shape or a concave shape, so that the design requirements cannot be met. When this occurs, measures are generally taken: firstly, the slow pressurization process remedies, but the problem cannot be completely solved; secondly, the middle of the pipeline is cut off, the air between the hose for repairing and the original pipeline is discharged, then the pipeline is pressurized again, but the process needs to destroy and excavate the original pipeline again, the repairing time is long, the labor intensity is large, the environment and the road are destroyed, and the measure is not allowed generally.
Disclosure of Invention
The invention aims to provide a pipe expanding device and a process for a hose for trenchless rehabilitation, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a non-excavation is restoreed with pipe device that rises of hose, is including opening ball, ball sealer in advance, opening ball and ball sealer are two independent spheroids in advance, the ball sealer contains centre layer and elastic layer, the elastic layer parcel is on the centre layer.
Preferably, the pre-opened ball is made of a metal material.
Preferably, the central layer is made of a material with the hardness of Shore A more than or equal to 85 or the same hardness.
Preferably, the elastic layer is made of a high polymer elastic material with the hardness reaching Shore A65-85.
Further preferably, the wear resistance of the elastic layer is greater than the wear resistance of the hose for repair.
More preferably, the thickness of the elastic layer is more than or equal to 5 mm.
More preferably, the diameter of the pre-split ball is 60% to 90% of the diameter of the hose for repair.
More preferably, the diameter of the sealing ball is 1-2 mm larger than that of the hose for repair.
More preferably, the diameter of the central layer of the sealing ball is 50 to 85 percent of the diameter of the hose for repairing.
The invention also provides a pipe expanding process of the hose for trenchless rehabilitation, which comprises the following steps:
s1) inserting the hose for repair into the pipeline in a U shape or a concave shape;
s2) putting the pre-opening ball and the sealing ball into the hose for repairing from the inlet end of the hose for repairing in sequence;
s3) placing CCTV pipeline detection equipment into a to-be-expanded repair hose and behind a sealing ball;
s4) sealing the inlet end, and then slowly introducing compressed air, wherein the air pressure is not more than 1.2 times of the designed working pressure;
s5) the compressed air pushes the pre-opening ball and the sealing ball to move forwards slowly and to support and expand the hose for repair, and meanwhile, the CCTV pipeline detection equipment observes the pipe expansion condition, the over-bending condition and the real-time pipe expansion length of the hose for repair until the pipe expansion operation is completed, and the pre-opening ball, the sealing ball and the CCTV pipeline detection equipment are sequentially discharged from the other end of the hose for repair.
Advantageous effects
The pipe expanding device and the process for the non-excavation repairing hose adopt the pipe expanding device with the pre-opening ball and the sealing ball, the pre-opening ball firstly expands the large overbending and the large fold of the repairing hose to reduce the deformation amount of the repairing hose, and then the sealing ball with the diameter larger than that of the repairing hose eliminates the places with folds and concave shapes to achieve the pipe expanding effect, and the elastic layer of the sealing ball has the protection effect on the repairing hose and cannot expand the hose, thereby not only achieving the design requirement, but also achieving the high pipe expanding efficiency.
Drawings
Fig. 1 is a schematic view of a pipe expanding device and a process of a trenchless rehabilitation hose according to an embodiment of the present invention.
Reference numerals
1-pipeline, 2-hose for repair, 3-sealing ball, 31-central layer, 32-elastic layer, 4-pre-opening ball and 5-CCTV pipeline detection equipment.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, the pipe expanding device of the trenchless restoration hose comprises a pre-opening ball 4 and a sealing ball 3, wherein the pre-opening ball 4 and the sealing ball 3 are two independent spheres, the sealing ball 3 comprises a central layer 31 and an elastic layer 32, and the elastic layer 32 is wrapped on the central layer 31.
Example one
In this embodiment, repair pipeline 1 to DN125 steel pipe, the pipeline 1 internal diameter size of steel pipe is 130mm, include the following step:
s1) selecting a lining composite hose with the inner diameter of 122mm as a hose 2 for repair, and inserting the hose 2 for repair into the pipeline 1 in a U-shaped or concave manner;
s2) sequentially placing the pre-opening ball 4 and the sealing ball 3 into the repair hose 2 from the inlet end of the repair hose 2, wherein the diameter of the pre-opening ball 4 is 100mm, the diameter of the sealing ball 3 is 123mm, and the diameter of the central layer 31 of the sealing ball is 95 mm;
s3) placing the CCTV pipeline detection equipment 5 into the to-be-expanded repair hose 2 and behind the sealing ball 3;
s4) sealing the inlet end, and then slowly introducing compressed air;
s5), the compressed air pushes the pre-opening ball 4 and the sealing ball 3 to move forwards slowly and support and expand the hose 2 for repair, meanwhile, the CCTV pipeline detection equipment 5 observes the pipe expansion condition, the over-bending condition and the real-time pipe expansion length of the hose 2 for repair until the pipe expansion operation is completed, and the pre-opening ball 4, the sealing ball 3 and the CCTV pipeline detection equipment 5 sequentially come out from the other end of the hose 2 for repair.
Wherein the pressure-bearing capacity of the hose for repair 2 is 5.0 MPa. In the initial stage of pipe expansion, the injected air pressure is 2.0MPa, and the sealing ball 3 and the pre-opening ball 4 are pushed to move forwards. In the over-bent and small-wrinkled portion, the deformation of the repair hose 2 is large, which hinders the advance of the sealing ball 3, and the sealing ball 3 stops. At this time, the air pressure is increased to 3.0MPa, and the sealing ball 3 is continuously pushed forward, so that the sealing ball 3 can prop and rise the over-bent or small-wrinkled part of the repair hose 2, and the deformation amount of the over-bent or small-wrinkled part is reduced to be eliminated, and in the embodiment, the deformation amount of the small-wrinkled part is reduced by 50%. The sealing ball 3 moves from the inlet end to the outlet end of the hose 2 for repair, and the expansion of the hose 2 for repair is completed.
In this embodiment, the pre-split ball 4 is made of hard plastic with hardness reaching shore a 92, the elastic layer of the sealing ball 3 is made of medium hard plastic rubber with hardness reaching shore a 70, and the DN125 steel pipe has strong bearing capacity, so that pipe expansion can be performed by using relatively large air pressure.
Example two
In this embodiment, repair pipeline 1 of PVC water supply pipe, 1 internal diameter size of pipeline of PVC water supply pipe is 200mm, include the following step:
s1) selecting a lining composite hose with the inner diameter of 192mm as a hose 2 for repair, and inserting the hose 2 for repair into the pipeline 1 in a U-shaped or concave manner;
s2) sequentially placing the pre-opening ball 4 and the sealing ball 3 into the repair hose 2 from the inlet end of the repair hose 2, wherein the diameter of the pre-opening ball 4 is 170mm, the diameter of the sealing ball 3 is 194mm, and the diameter of the central layer 31 of the sealing ball is 150 mm;
s3) placing the CCTV pipeline detection equipment 5 into the to-be-expanded repair hose 2 and behind the sealing ball 3;
s4) sealing the inlet end, and then slowly introducing compressed air;
s5), the compressed air pushes the pre-opening ball 4 and the sealing ball 3 to move forwards slowly and support and expand the hose 2 for repair, meanwhile, the CCTV pipeline detection equipment 5 observes the pipe expansion condition, the over-bending condition and the real-time pipe expansion length of the hose 2 for repair until the pipe expansion operation is completed, and the pre-opening ball 4, the sealing ball 3 and the CCTV pipeline detection equipment 5 sequentially come out from the other end of the hose 2 for repair.
Wherein the pressure-bearing capacity of the hose for repair 2 is 1.6 MPa. In the initial stage of pipe expansion, the pressure of the injected air is 0.6MPa, and the sealing ball 3 and the pre-opening ball 4 are pushed to move forwards. In the over-bent and small-wrinkled portion, the deformation of the repair hose 2 is large, which hinders the advance of the sealing ball 3, and the sealing ball 3 stops. At this time, the air pressure is increased to 1.0MPa, and the sealing ball 3 is continuously pushed forward, so that the sealing ball 3 can prop and rise the over-bent or small-wrinkled part of the repair hose 2, and the deformation amount of the over-bent or small-wrinkled part is reduced to be eliminated, and in the embodiment, the deformation amount of the small-wrinkled part is reduced by 40%. The sealing ball 3 moves from the inlet end to the outlet end of the hose 2 for repair, and the expansion of the hose 2 for repair is completed.
In this embodiment, the pre-opened ball 4 is made of medium hard plastic with hardness of shore a 88, the sealing ball 3 is made of medium hard plastic rubber with hardness of shore a 65, and the pressure bearing capacity of the PVC water supply pipe is generally 1.6MPa, so that the pipe can be expanded by relatively small air pressure.
Preferably, the pre-split ball 4 is made of a metal material, and when the pipe expansion operation is performed, the pre-split ball 4 is located at the front end of the sealing ball 3, and supports an excessively large over-bend or wrinkle in the hose 2 for repair in advance, so that the movement of the sealing ball 3 is reduced.
Preferably, the central layer 31 is made of a hard plastic material with the hardness of Shore A greater than or equal to 85, so that deformation of the central layer during pipe expansion operation is avoided.
Preferably, the elastic layer 32 is made of a high polymer elastic material with the hardness of shore a 65-85, and when encountering a hard obstacle in the pipe expansion operation, the elastic layer can slightly deform, so that the pipe expansion operation is realized and the hose 2 for repair cannot be damaged.
Preferably, the wear resistance of the elastic layer 32 is greater than that of the hose 2 for repair, so that the sealing ball 3 can be operated for a long time and in a long pipeline.
Preferably, the thickness of the elastic layer 32 is more than or equal to 5 mm.
Preferably, the diameter of the pre-opening ball 4 is 60% to 90% of the diameter of the hose 2 for repair.
Preferably, the diameter of the sealing ball 3 is 1-2 mm larger than that of the repairing hose 2.
Preferably, the diameter of the center layer of the sealing ball 3 is 50% to 80% of the diameter of the hose 2 for repair.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the scope of the protection of the present invention.

Claims (7)

1. A pipe expanding process of a hose for trenchless rehabilitation is characterized in that: the pipe expanding device comprises a pre-opening ball and a sealing ball, wherein the pre-opening ball and the sealing ball are two independent balls, the sealing ball comprises a central layer and an elastic layer, the elastic layer wraps the central layer, the pre-opening ball is made of a metal material, and the central layer is made of a material with the Shore A hardness of more than or equal to 85 or the same hardness;
the pipe expanding process adopting the pipe expanding device comprises the following steps:
s1) inserting the hose for repair into the pipeline in a U shape or a concave shape;
s2) putting the pre-opening ball and the sealing ball into the hose for repairing from the inlet end of the hose for repairing in sequence;
s3) placing CCTV pipeline detection equipment into a to-be-expanded repair hose and behind a sealing ball;
s4) sealing the inlet end, and then slowly introducing compressed air, wherein the air pressure is not more than 1.2 times of the designed working pressure;
s5) the compressed air pushes the pre-opening ball and the sealing ball to move forwards slowly and to support and expand the hose for repair, and meanwhile, the CCTV pipeline detection equipment observes the pipe expansion condition, the over-bending condition and the real-time pipe expansion length of the hose for repair until the pipe expansion operation is completed, and the pre-opening ball, the sealing ball and the CCTV pipeline detection equipment are sequentially discharged from the other end of the hose for repair.
2. The pipe expanding process of the hose for trenchless rehabilitation as claimed in claim 1, wherein: the elastic layer is made of a high-polymer elastic material with the hardness reaching Shore A65-85.
3. The pipe expanding process of the hose for trenchless rehabilitation as claimed in claim 1, wherein: the wear resistance of the elastic layer is greater than that of the hose for repair.
4. The pipe expanding process of the hose for trenchless rehabilitation as claimed in claim 1, wherein: the thickness of the elastic layer is more than or equal to 5 mm.
5. The pipe expanding process of the hose for trenchless rehabilitation as claimed in claim 1, wherein: the diameter of the pre-opening ball is 60% -90% of the diameter of the hose for repair.
6. The pipe expanding process of the hose for trenchless rehabilitation as claimed in claim 1, wherein: the diameter of the sealing ball is 1-2 mm larger than that of the hose for repair.
7. The pipe expanding process of the hose for trenchless rehabilitation as claimed in claim 1, wherein: the diameter of the central layer of the sealing ball is 50-85% of that of the hose for repair.
CN202010478999.6A 2020-05-29 2020-05-29 Pipe expanding device and process for hose for trenchless restoration Active CN111649188B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010478999.6A CN111649188B (en) 2020-05-29 2020-05-29 Pipe expanding device and process for hose for trenchless restoration

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Application Number Priority Date Filing Date Title
CN202010478999.6A CN111649188B (en) 2020-05-29 2020-05-29 Pipe expanding device and process for hose for trenchless restoration

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CN111649188B true CN111649188B (en) 2021-12-03

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1435479A1 (en) * 1987-04-24 1988-11-07 Предприятие П/Я В-2120 Apparatus for rubber-lining tubular articles
JP2001310388A (en) * 2000-04-27 2001-11-06 Osaka Gas Co Ltd Method for finishing inside of thermoplastic resin cylinder and pig for expansion
JP2008275128A (en) * 2007-05-07 2008-11-13 Osaka Gas Co Ltd Drawing tool
CN105058782A (en) * 2015-08-14 2015-11-18 湖北华宁防腐技术股份有限公司 Rubber lining process and equipment of elbow pipeline
CN208555377U (en) * 2018-05-30 2019-03-01 上海郝丰石油机械有限公司 Hydraulic fill pipeline rotating wash bowl
CN111442023B (en) * 2020-04-15 2021-07-20 四川永晖建筑工程有限公司 Auxiliary device for bonding and fixing pipeline connector

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