GB2133497A - Apparatus for sealing a leak in the wall of a pipe - Google Patents

Apparatus for sealing a leak in the wall of a pipe Download PDF

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Publication number
GB2133497A
GB2133497A GB08300925A GB8300925A GB2133497A GB 2133497 A GB2133497 A GB 2133497A GB 08300925 A GB08300925 A GB 08300925A GB 8300925 A GB8300925 A GB 8300925A GB 2133497 A GB2133497 A GB 2133497A
Authority
GB
United Kingdom
Prior art keywords
pipe
shaft
ofthe
cone
vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB08300925A
Other versions
GB8300925D0 (en
Inventor
Dr Peter Spence Clough
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Gas Corp
Original Assignee
British Gas Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by British Gas Corp filed Critical British Gas Corp
Priority to GB08300925A priority Critical patent/GB2133497A/en
Publication of GB8300925D0 publication Critical patent/GB8300925D0/en
Publication of GB2133497A publication Critical patent/GB2133497A/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F16L55/1645—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing material being introduced inside the pipe by means of a tool moving in the pipe

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Abstract

The present invention relates to apparatus for sealing a leak in the wall of a pipe, typically a gas main, comprising a vehicle 1 for movement along the internal bore of the pipe incorporating means for applying to the internal surface of the pipe a hardenable fluid sealant and means for smoothing the fluid coating so applied.

Description

SPECIFICATION Apparatus for sealing a leak or leaks in the wall of a pipe The present invention relates to apparatus for sealing a leak or leaks in the wall of a pipe, typically a gas main.
According to the present invention, there is provided apparatus for sealing a leak in the wall of a pipe, the apparatus comprising a vehicle for movement along the internal bore ofthe pipe, the vehicle incorporating meansforapplying to the internal surface ofthe pipe a coating of a hardenable fluid sealant and means for smoothing out any irregularities in the surface ofthecoating so applied.
Preferably the means for smoothing out any irregularities in the coating comprises a member having a flexibleskirtwith a circumferential edgetoengagethe internal surface ofthe pipe.
Suitably the vehicle comprises a shaft resiliently mounted for conveyance centrally th rough the pipe, the member being mounted at the trailing end ofthe shaft.
Conveniently, the member is conical.
An embodiment of the invention will now be particularly described with reference to the accompanying drawing in which:~ Figure 1 is a schematic side view of the vehicle in position in a pipe to be coated and Figure 2 is a view along the line I-I in Figure 1.
Referring to the drawing the apparatus comprises a vehicle 1 having a wheel mounted central shaft 2.
The shaft has a leading solid end 3 connected to a hollow trailing end 4.
The hollow trailing end 4 has an apertured end portion leading from an adjacent portion 6 into which two inlets 7 and 8 extend.
Mounted at the trailing end ofthe shaft 2 is a flexible cone 9 serving to provide smoothing ofthe applied sealant coating when its peripheral outer edge 10 engages the internal surface 11 of the pipe 12 (which in this case is a gas main).
Spaced forwardlyfrom the cone 9 is a further flexible cone 13 which is mounted on the shaft 2, the apertured shaft portion 5 being located between the cone 9 and 13. The cone 13 has a peripheral outer edge 14 which is also adapted to engage the internal surface 11 ofthe pipe 12. The cone 9 and 13form between them, in use, an annular reservoir 15 for the sealant.
The cones 9 and 13 are made of rubber, cone 9 being of slightly softer rubberthan cone 13 and each cone is provided with a reinforcement in the form of conical backing plates 16 and 17. These plates 16 and 17 have peripheral edges respectivelyterminating shortofthe edges of the rubber cones 9 and 13 to permit the rubber cones flexibly to engage the internal surface of the pipe.
The shaft is mounted on a pairofspaced bogeys 18 and 19. Each bogey comprises three wheels 20 spaced equiangularly around the axis ofthe shaft 2 as shown in Figure2.
Each wheel is mounted on an axle 21 which is itself mounted on bearing plates 22 secured to a leaf spring 23 which is secured to the shaft 2, The bogeys maintain the central position ofthe shaft 2 within the pipe 12 while the spring mounted wheels 20 enable the vehicle to ride over uneven surfaceswithinthepipe 12.
Disposed within the portion 6 of the shaft is a number of serially arranged static mixers 24 which mix together the components of a two component polymer mix serving asthe sealant. The components ofthe mix are supplied through the inlets 7 and 8 and after mixing are pumped by the mixers 24 to the apertured end 5 of the shaft 2.
The mixture emerges through the apertures 25 in theend5intotheannularreservoirl5formed between the cones 9 and 13.
The reservoir 15 serves as a supplyforapplying sealant to coatthe internal surface ofthe pipe when the reservoir 15 contains sufficient sealant.
Thetrailing cone 9 serves as means to smooth off and even out any ripples in the coating 26.
The vehicle can be drawn through the pipe by meansofafluidflywheeltypewinch (not shown) in the direction ofthearrowAwhilethe coating is continuously applied.
The polymer can be leftto harden and seal any leaks inthewall ofthepipe.
Instead ofthe apertured end 5 ofthe shaft 2, a spray device can be provided to spray the polymer radially outwardly against the internal wall ofthe pipe in front of the scraper cone 9. In this case there is no need to form a reservoir 15 and the other cone 3 can be omitted.
1. Apparatus for sealing a leak or leaks in the wall of a pipe, the apparatus comprising a vehicle for movement along the bore ofthe pipe, the vehicle incorporating means for applying to the internal surface ofthe pipe a coating of a hardenablefluid sealant and meansforsmoothing out any ripples in the fluid coating so applied.
2. Apparatus as claimed in claim 1 in which the meansforsmoothing out any ripples in the coating comprises a member having a skirt with a flexible circumferential edge to engage the internal surface of the pipe.
3. Apparatus as claimed in Claim 2 in which the vehicle comprises a shaft resiliently mounted for conveyance centrally th rough the pipe, the member being mounted at the trailing end ofthe shaft.
4. Apparatus as claimed in Claim 2 or Claim 3 in which the member is conical.
5. Apparatus substantially as hereinbefore de scribed with reference to the accompanying. drawings The drawing(s) originally filed were informal and the print here reproduced is taken from a later filed formal copy.
This print takes account of replacement documents later filed to enable the application to comply with the formal requirements of the Patents Rules 1978.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Apparatus for sealing a leak or leaks in the wall of a pipe The present invention relates to apparatus for sealing a leak or leaks in the wall of a pipe, typically a gas main. According to the present invention, there is provided apparatus for sealing a leak in the wall of a pipe, the apparatus comprising a vehicle for movement along the internal bore ofthe pipe, the vehicle incorporating meansforapplying to the internal surface ofthe pipe a coating of a hardenable fluid sealant and means for smoothing out any irregularities in the surface ofthecoating so applied. Preferably the means for smoothing out any irregularities in the coating comprises a member having a flexibleskirtwith a circumferential edgetoengagethe internal surface ofthe pipe. Suitably the vehicle comprises a shaft resiliently mounted for conveyance centrally th rough the pipe, the member being mounted at the trailing end ofthe shaft. Conveniently, the member is conical. An embodiment of the invention will now be particularly described with reference to the accompanying drawing in which:~ Figure 1 is a schematic side view of the vehicle in position in a pipe to be coated and Figure 2 is a view along the line I-I in Figure 1. Referring to the drawing the apparatus comprises a vehicle 1 having a wheel mounted central shaft 2. The shaft has a leading solid end 3 connected to a hollow trailing end 4. The hollow trailing end 4 has an apertured end portion leading from an adjacent portion 6 into which two inlets 7 and 8 extend. Mounted at the trailing end ofthe shaft 2 is a flexible cone 9 serving to provide smoothing ofthe applied sealant coating when its peripheral outer edge 10 engages the internal surface 11 of the pipe 12 (which in this case is a gas main). Spaced forwardlyfrom the cone 9 is a further flexible cone 13 which is mounted on the shaft 2, the apertured shaft portion 5 being located between the cone 9 and 13. The cone 13 has a peripheral outer edge 14 which is also adapted to engage the internal surface 11 ofthe pipe 12. The cone 9 and 13form between them, in use, an annular reservoir 15 for the sealant. The cones 9 and 13 are made of rubber, cone 9 being of slightly softer rubberthan cone 13 and each cone is provided with a reinforcement in the form of conical backing plates 16 and 17. These plates 16 and 17 have peripheral edges respectivelyterminating shortofthe edges of the rubber cones 9 and 13 to permit the rubber cones flexibly to engage the internal surface of the pipe. The shaft is mounted on a pairofspaced bogeys 18 and 19. Each bogey comprises three wheels 20 spaced equiangularly around the axis ofthe shaft 2 as shown in Figure2. Each wheel is mounted on an axle 21 which is itself mounted on bearing plates 22 secured to a leaf spring 23 which is secured to the shaft 2, The bogeys maintain the central position ofthe shaft 2 within the pipe 12 while the spring mounted wheels 20 enable the vehicle to ride over uneven surfaceswithinthepipe 12. Disposed within the portion 6 of the shaft is a number of serially arranged static mixers 24 which mix together the components of a two component polymer mix serving asthe sealant. The components ofthe mix are supplied through the inlets 7 and 8 and after mixing are pumped by the mixers 24 to the apertured end 5 of the shaft 2. The mixture emerges through the apertures 25 in theend5intotheannularreservoirl5formed between the cones 9 and 13. The reservoir 15 serves as a supplyforapplying sealant to coatthe internal surface ofthe pipe when the reservoir 15 contains sufficient sealant. Thetrailing cone 9 serves as means to smooth off and even out any ripples in the coating 26. The vehicle can be drawn through the pipe by meansofafluidflywheeltypewinch (not shown) in the direction ofthearrowAwhilethe coating is continuously applied. The polymer can be leftto harden and seal any leaks inthewall ofthepipe. Instead ofthe apertured end 5 ofthe shaft 2, a spray device can be provided to spray the polymer radially outwardly against the internal wall ofthe pipe in front of the scraper cone 9. In this case there is no need to form a reservoir 15 and the other cone 3 can be omitted. CLAIMS
1. Apparatus for sealing a leak or leaks in the wall of a pipe, the apparatus comprising a vehicle for movement along the bore ofthe pipe, the vehicle incorporating means for applying to the internal surface ofthe pipe a coating of a hardenablefluid sealant and meansforsmoothing out any ripples in the fluid coating so applied.
2. Apparatus as claimed in claim 1 in which the meansforsmoothing out any ripples in the coating comprises a member having a skirt with a flexible circumferential edge to engage the internal surface of the pipe.
3. Apparatus as claimed in Claim 2 in which the vehicle comprises a shaft resiliently mounted for conveyance centrally th rough the pipe, the member being mounted at the trailing end ofthe shaft.
4. Apparatus as claimed in Claim 2 or Claim 3 in which the member is conical.
5. Apparatus substantially as hereinbefore de scribed with reference to the accompanying. drawings The drawing(s) originally filed were informal and the print here reproduced is taken from a later filed formal copy.
This print takes account of replacement documents later filed to enable the application to comply with the formal requirements of the Patents Rules 1978.
GB08300925A 1983-01-13 1983-01-13 Apparatus for sealing a leak in the wall of a pipe Withdrawn GB2133497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08300925A GB2133497A (en) 1983-01-13 1983-01-13 Apparatus for sealing a leak in the wall of a pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08300925A GB2133497A (en) 1983-01-13 1983-01-13 Apparatus for sealing a leak in the wall of a pipe

Publications (2)

Publication Number Publication Date
GB8300925D0 GB8300925D0 (en) 1983-02-16
GB2133497A true GB2133497A (en) 1984-07-25

Family

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Family Applications (1)

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GB08300925A Withdrawn GB2133497A (en) 1983-01-13 1983-01-13 Apparatus for sealing a leak in the wall of a pipe

Country Status (1)

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GB (1) GB2133497A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263505A1 (en) * 1986-10-07 1988-04-13 Zawisla GmbH & Co. KG Method and device for the renovation or lining of pipes and renovating or lining material
FR2613029A1 (en) * 1987-03-23 1988-09-30 Europ Services Appliance for applying a coating to an internal rubbish-chute
FR2613258A1 (en) * 1987-04-03 1988-10-07 Devin Lemarchand Entreprise Apparatus for applying an organo-hydraulic complex as a means for sealing buried pipes
EP0485653A1 (en) * 1989-08-15 1992-05-20 Gerald G. Northcutt Pipe lining system
EP0518174A1 (en) * 1991-06-11 1992-12-16 Werner & Pfleiderer GmbH Method and apparatus for applying a coating to the inner surface of a pipe
US5653555A (en) 1995-05-19 1997-08-05 Inliner, U.S.A. Multiple resin system for rehabilitating pipe
US5699838A (en) 1995-05-22 1997-12-23 Inliner, U.S.A. Apparatus for vacuum impregnation of a flexible, hollow tube
FR2838986A1 (en) * 2002-04-29 2003-10-31 Cit Alcatel Equipment for coating internal surface of inaccessible pipe or duct, e.g. for cable, comprises cylindrical body which has locating wings, orifices for propulsion jets, an anti return skirt and an angled spreading spatula
EP1445029A2 (en) * 2003-02-05 2004-08-11 PeinigerRöRo GmbH Pipe coating and stripping apparatus
EP3470724A1 (en) * 2017-10-10 2019-04-17 Kipp Umwelttechnik GmbH Method and device for coating the inside of pipes and/or pipelines

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1035412A (en) * 1964-04-24 1966-07-06 Raymond Int Inc Improvements in drag troweling arrangements for use in lining of conduits
GB1090490A (en) * 1966-06-01 1967-11-08 Perkins Pipe Linings Inc Trowel means for smoothing a layer of plastic lining material in an interior generally cylindrical surface
GB1107942A (en) * 1965-09-30 1968-03-27 Perkins Pipe Linings Inc Pipe lining trowel apparatus
GB1136182A (en) * 1967-06-28 1968-12-11 Pipe Linings Inc Troweling device
GB1152570A (en) * 1967-06-28 1969-05-21 Pipe Linings Inc A Spreader for a Pipelining Machine.
GB1182133A (en) * 1966-05-12 1970-02-25 Raymond Int Inc Means and Method for Lining Pipe at its Ends
GB1335206A (en) * 1969-11-03 1973-10-24 Granit Och Beton Ab Method and device for sealing conduits from the inside
GB2065263A (en) * 1979-11-22 1981-06-24 Kankyo Kaihatsu Kk Apparatus for reinforcing and repairing a pipe line

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1035412A (en) * 1964-04-24 1966-07-06 Raymond Int Inc Improvements in drag troweling arrangements for use in lining of conduits
GB1107942A (en) * 1965-09-30 1968-03-27 Perkins Pipe Linings Inc Pipe lining trowel apparatus
GB1182133A (en) * 1966-05-12 1970-02-25 Raymond Int Inc Means and Method for Lining Pipe at its Ends
GB1090490A (en) * 1966-06-01 1967-11-08 Perkins Pipe Linings Inc Trowel means for smoothing a layer of plastic lining material in an interior generally cylindrical surface
GB1136182A (en) * 1967-06-28 1968-12-11 Pipe Linings Inc Troweling device
GB1152570A (en) * 1967-06-28 1969-05-21 Pipe Linings Inc A Spreader for a Pipelining Machine.
GB1335206A (en) * 1969-11-03 1973-10-24 Granit Och Beton Ab Method and device for sealing conduits from the inside
GB2065263A (en) * 1979-11-22 1981-06-24 Kankyo Kaihatsu Kk Apparatus for reinforcing and repairing a pipe line

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263505A1 (en) * 1986-10-07 1988-04-13 Zawisla GmbH & Co. KG Method and device for the renovation or lining of pipes and renovating or lining material
FR2613029A1 (en) * 1987-03-23 1988-09-30 Europ Services Appliance for applying a coating to an internal rubbish-chute
FR2613258A1 (en) * 1987-04-03 1988-10-07 Devin Lemarchand Entreprise Apparatus for applying an organo-hydraulic complex as a means for sealing buried pipes
EP0485653A1 (en) * 1989-08-15 1992-05-20 Gerald G. Northcutt Pipe lining system
EP0518174A1 (en) * 1991-06-11 1992-12-16 Werner & Pfleiderer GmbH Method and apparatus for applying a coating to the inner surface of a pipe
US5309947A (en) * 1991-06-11 1994-05-10 Werner & Pfleiderer, Gmbh Apparatus for lining an inside wall of a sewer pipe
US5653555A (en) 1995-05-19 1997-08-05 Inliner, U.S.A. Multiple resin system for rehabilitating pipe
US5699838A (en) 1995-05-22 1997-12-23 Inliner, U.S.A. Apparatus for vacuum impregnation of a flexible, hollow tube
FR2838986A1 (en) * 2002-04-29 2003-10-31 Cit Alcatel Equipment for coating internal surface of inaccessible pipe or duct, e.g. for cable, comprises cylindrical body which has locating wings, orifices for propulsion jets, an anti return skirt and an angled spreading spatula
EP1445029A2 (en) * 2003-02-05 2004-08-11 PeinigerRöRo GmbH Pipe coating and stripping apparatus
EP1445029A3 (en) * 2003-02-05 2007-06-06 PeinigerRöRo GmbH Pipe coating and stripping apparatus
EP3470724A1 (en) * 2017-10-10 2019-04-17 Kipp Umwelttechnik GmbH Method and device for coating the inside of pipes and/or pipelines

Also Published As

Publication number Publication date
GB8300925D0 (en) 1983-02-16

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)