EP3080509A1 - Dispositif et procédure pour la réparation d'une partie d'au moins un tuyau - Google Patents

Dispositif et procédure pour la réparation d'une partie d'au moins un tuyau

Info

Publication number
EP3080509A1
EP3080509A1 EP14838812.7A EP14838812A EP3080509A1 EP 3080509 A1 EP3080509 A1 EP 3080509A1 EP 14838812 A EP14838812 A EP 14838812A EP 3080509 A1 EP3080509 A1 EP 3080509A1
Authority
EP
European Patent Office
Prior art keywords
balloon
pipe
repair
previous
fluid
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Withdrawn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
EP14838812.7A
Other languages
German (de)
English (en)
Inventor
Francesco Paolo Criffo'
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.)
In Tec SRL
Original Assignee
In Tec SRL
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 In Tec SRL filed Critical In Tec SRL
Publication of EP3080509A1 publication Critical patent/EP3080509A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
    • F16L55/265—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means specially adapted for work at or near a junction between a main and a lateral 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
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/179—Devices for covering leaks in pipes or hoses, e.g. hose-menders specially adapted for bends, branch units, branching pipes or the like

Definitions

  • the present invention relates to a device and a procedure for the repair of a portion of at least one pipe.
  • the preferred field of application is the non-destructive repair of drainage pipes in general, for example both horizontal and vertical pipes of a sewer network.
  • the rehabilitative intervention may be planned at one or more pipes or in the intersection zone between two pipes, for example at the intersection zone between a main .manifold and the lateral feeder pipe of the main manifold or at the intersection zone between three pipes, for example at the intersection zone between a main manifold and two feeder pipes of the main manifold.
  • Non-destructive systems for repairing a lateral feeder pipe of a main manifold of a sewer system or a drainage pipe have been present on the market for some time, wherein the rehabilitative coating element of the lateral pipe, housed in a condition of retroflexion in a suitable container and opportunely impregnated with a thermosetting resin, is transported to the site to be rehabilitated by a robotic machine and, when it reaches the site, is subjected to a jet of pressurised air which everts it so as to shape it to the lateral pipe, and lastly stiffened by triggering polymerisation of the resin.
  • the technical task of the present invention is, therefore, to provide a device and a procedure for the repair of a portion of at least one pipe which obviates the above- described technical drawbacks of the prior art.
  • one object of the invention is manufacturing a device and a procedure for the repair of a portion of at least one pipe capable of always guaranteeing the desired performance and final result simply, inexpensively and rapidly, and without using robotic machines.
  • a device for the repair of a portion of at least one pipe comprising a rehabilitative coating element of said at least one pipe, impregnated with a thermosetting resin and fitted onto an inflatable positioning balloon in turn fitted onto a transport device having internally a circuit for circulation of an inflating fluid of said balloon, characterised in that said circuit has electrical heating means of said fluid, and in that said balloon has venting means.
  • the venting means of the balloon are obviously separate from the route which places the balloon in fluid communication with the inflating fluid circulation circuit.
  • the venting means preferably comprise at least one precalibrated valve for opening on achieving a threshold value of the inflating fluid in the balloon and/or at least one calibrated venting hole adapted to maintain a certain pressure of the inflating fluid inside the balloon.
  • the present invention also reveals a procedure for the repair of a portion of at least one pipe, characterised in that it provides an inflatable positioning balloon, fitting onto said balloon a rehabilitative coating element of said portion of said pipe impregnated with a thermosetting resin, applying said balloon to a transport device, transporting said balloon into a position for repair, inflating said balloon with an inflating fluid so as to adapt the coating element to the inner wall of said portion of said pipe, and assisting the polymerisation of the resin by introduction by means of the balloon of a flow of hot inflating fluid which affects at least the zone of said balloon coated in said rehabilitative element.
  • the flow of hot inflating fluid is achieved by creating a vent for the hot inflating fluid.
  • FIG. 2 shows a view in longitudinal cross-section of the device for nondestructive repair of a lateral feeder pipe of a main manifold, positioned at the repair site but with the balloon still to be inflated;
  • FIG. 2 shows the device of Figure 1 , positioned at the repair site and with the balloon inflated;
  • FIG. 3 shows the rehabilitative element applied;
  • FIG. 4 shows an elevated side view of the rehabilitative coating element of the lateral pipe in its configuration when the balloon is not inflated and the second chamber of the balloon is introflected into the first chamber of the balloon;
  • FIG. 5 shows an elevated side view of the rehabilitative coating element of the lateral pipe in its configuration when the balloon is inflated and the second chamber of the balloon is everted by the first chamber of the balloon.
  • a device 1 for the non-destructive repair, by way of example, of a lateral feeder pipe 2 of a main manifold 3, particularly but not necessarily of a sewer network or a drainage pipe in general.
  • the device 1 comprises a rehabilitative coating element 4 of the lateral pipe 2, impregnated with a thermosetting resin and fitted onto an inflatable positioning balloon 5 connected to a transport device of the balloon 5 along the main manifold 3.
  • the resin is preferably the epoxy type.
  • the balloon 5 has, in this specific case, in which rehabilitation of the intersection zone between a main manifold 3 and one of its lateral feeder pipes 2 is necessary, a first tubular chamber 10 shapeable to the main manifold 3 and a second tubular chamber 11 evertable in a transversal direction from the first tubular chamber 10 and shapeable to the lateral pipe 2.
  • the rehabilitative element 4 has a first tubular part 6 carried by the first chamber 10 and shapeable to the inner wall of the main manifold 3, and a second tubular part 7 carried by the second chamber 11 and shapeable to the inner wall of the lateral pipe 2.
  • the first part 6 of the rehabilitative element 4 is positionable around the outlet hole 9 of the lateral pipe 2 in the main manifold 3, both to ensure correct positioning of the second tubular part 7 and to avoid withdrawal after positioning.
  • the rehabilitative element 4 may be made of non-woven fabric, felt or another material and may advantageously have on the outer side, i.e. on the side opposite the one turned towards the balloon 5, a layer of anti-friction, anti-wear, releasing and waterproof material, for example nylon.
  • the rehabilitative element 4 has a coloured strip 33 along the demarcation line between the first part 6 and the second part 7.
  • a balloon may be provided with a single tubular chamber when rehabilitation of a single pipe is necessary, or a balloon having at least two tubular chambers evertable in a transversal direction from a main tubular chamber when rehabilitation of the intersection zone between a main manifold and two of its lateral feeder pipes is necessary.
  • the transport device has internally a circuit for circulation of an inflating fluid of the balloon 5, for example air or water.
  • the circulation circuit of the inflating fluid has special electrical heating means of the fluid, for example a cartridge heater 32, activated as will be seen to assist polymerisation of the resin.
  • the balloon 5 has venting means, for example a precalibrated mechanical valve 34 for opening on reaching a threshold value of the pressure of the inflating fluid of the balloon 5. Said valves are closed beneath said threshold value and open on reaching and above said threshold value to trigger circulation of the hot inflating fluid relating at least to the zone of the balloon 5 coated with the rehabilitative element 4.
  • venting means for example a precalibrated mechanical valve 34 for opening on reaching a threshold value of the pressure of the inflating fluid of the balloon 5.
  • Said valves are closed beneath said threshold value and open on reaching and above said threshold value to trigger circulation of the hot inflating fluid relating at least to the zone of the balloon 5 coated with the rehabilitative element 4.
  • the venting means may also comprise at least one calibrated hole of the balloon adapted to maintain a certain pressure of the inflating fluid inside said balloon 5 thereof.
  • the venting means are preferably provided at the end of the second chamber 11 of the balloon 5 opposite the attachment end to the first chamber 10 of the balloon 5.
  • the transport device has a front guide element 12, a rear guide element 13 and at least one mechanical connection bar 14 between said front guide element 12 and said rear guide element 13.
  • the front and rear guide elements 12 and 13 preferably have outer guide arms 18 and 19 provided with spherical sliding ends 20 and 21 along the inner wall of the main manifold 3, which allow the transport device also to rotate around its own longitudinal axis to align the rehabilitative element 4 to the outlet hole 9 of the lateral pipe 2.
  • the bar 14 is flexible and resistant to compression and torque.
  • flexibility of the bar 14 may be modulated providing end lengths in stiffer material and a central length in a more flexible material.
  • the circuit for circulation of the inflating fluid has a rear manifold 15 afforded inside the body of the rear guide element 13, a front manifold 16 afforded inside the body of the front guide element 12 and a longitudinal channel 17 of connection of the fluid between said front manifold 16 and said rear manifold 15 afforded inside the body of said connection bar 14.
  • the first chamber 10 of the balloon 5 contains in the longitudinal direction the bar 14 and has an open front end fitted fluid sealed, for example by means of an attachment band 22 on the body of the front guide element 12, and an open rear end fitted fluid sealed, for example by means of an attachment band 23 on the body of the front guide element 13.
  • Retaining bands may also be provided wrapped around the balloon 5 to retain it in a configuration of reduced dimensions when it is inflated. In this case, the retaining bands have assisted breakage due to the effect of inflating of the balloon 5.
  • the circuit for circulation of the inflating fluid has a fluid temperature sensor 24 and a fluid pressure sensor 25.
  • a housing 26 is provided for electrical heating means and a passage 30 which places the rear manifold 15 in fluid communication with the balloon 5.
  • the passage 30 may for example be defined, as shown, by a hollow space provided between the outer perimeter surface of the electrical heating means and their housing 26.
  • the electrical cables 28 extend inside said longitudinal channel 17 of connection between said rear manifold 15 and said front manifold 16.
  • the channel 27 has an open front end in fluid communication with the balloon 5 and a rear end sealed by a cap 31 through which the cables 28 pass.
  • the pressure sensor 25 and the temperature sensor 24 are positioned at the front end of the channel 29 in turn in fluid communication with the balloon 5.
  • the device 1 is connected to a remote unit (not shown) of control of the electrical heating means and the compressor supplying the inflating fluid.
  • the remote control unit also provides a display of the temperature and pressure detected by the temperature sensor 24 and by the pressure sensor 25.
  • a flexible tube 36 resistant to traction, compression and torque is provided, having a mechanical and fluid connection with the front manifold 16.
  • the main manifold 3 is generally oriented vertically.
  • the prior operation consists in lowering the transport device by means of the pipe 36 along the main manifold 3 until it is placed in the correct position where the main manifold 3 crosses the lateral pipe 2, and aligning the rehabilitative element 4 with the outlet hole 9 of the lateral pipe 2. Said operation is performed with the assistance of a video camera inserted along the lateral pipe 2 which uses as a reference the coloured strip 33 present on the rehabilitative element 4.
  • the balloon 5 remains inflated until the final position of the transport device is reached.
  • control unit activates a compressor connected to the pipe 36 to generate a flow of the inflating fluid of the balloon 5, and leaves the electrical heating means deactivated.
  • the flow of fluid cascades along the tube 36, the front manifold 16, the channel 17, the rear manifold 15 and through the passage 30, and enters the balloon 5.
  • the second chamber 11 of the balloon 5 everts from the first chamber 10 of the balloon 5 and is inserted in the lateral pipe 2.
  • the first chamber 10 of the balloon 5 has caused the first tubular part 6 of the rehabilitative element 4 to shape itself to the inner wall of the main manifold 3 around the hole 9, while the second chamber 11 of the balloon 5 has caused the second tubular part 7 of the rehabilitative element 4 to shape itself to the inner wall of the lateral pipe 2 where the defect 40 to be repaired is located.
  • the shape of the rehabilitative element 4 is consolidated, maintaining the compressor activated and now activating also the electrical heating means which heat the inflating fluid entering the balloon 5 to activate polymerisation of the resin with which the rehabilitative element 4 is impregnated.
  • the pressure inside the balloon 5 increases gradually up to a threshold value at which the valve which determines controlled venting of the balloon 5 opens.
  • the vent positioned at the end of the second chamber 11 is distal from the first chamber 10, the flow of hot inflating fluid is forced to rise through the second chamber 11 of the balloon 5 and therefore to reach the entire zone of the balloon 5 covered by the rehabilitative element 4.
  • the balloon 5 is withdrawn from the rehabilitative element 4 and the transport device is pulled along the main manifold 3 until complete extraction.
  • the entire process is managed remotely by an operator who, in the resin polymerisation phase after inflation of the balloon, regulates the electrical heating means as a function of the temperature and pressure values detected.
  • the repair system is applicable interchangeably to vertical or sloped or horizontal drainage pipes, to drainage pipes with a diameter starting from 60 mm, to drainage pipes without intakes or with one or two transversal intakes, to drainage pipes accessible from one side only.
  • the rehabilitative coating element may also have a different shape, for example it may be "hat-shaped".
  • the materials used, as well as the dimensions, may in practice be of any type according to requirements and the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pipe Accessories (AREA)

Abstract

L'invention concerne un dispositif (1) pour la réparation d'une partie d'au moins un tuyau (2, 3), comprenant un élément de revêtement de réhabilitation (4) du tuyau (2, 3), imprégné d'une résine thermodurcie et monté sur un ballon de positionnement gonflable (5) monté à son tour sur un dispositif de transport dont l'intérieur présente un circuit permettant la mise en circulation d'un fluide de gonflage dudit ballon (5), ledit circuit présentant des moyens de chauffage électrique dudit fluide, et ledit ballon (5) présentant des moyens de ventilation.
EP14838812.7A 2013-12-11 2014-12-11 Dispositif et procédure pour la réparation d'une partie d'au moins un tuyau Withdrawn EP3080509A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT002061A ITMI20132061A1 (it) 2013-12-11 2013-12-11 Dispositivo e procedimento per la riparazione di una porzione di almeno un tubo
PCT/IT2014/000326 WO2015087362A1 (fr) 2013-12-11 2014-12-11 Dispositif et procédure pour la réparation d'une partie d'au moins un tuyau

Publications (1)

Publication Number Publication Date
EP3080509A1 true EP3080509A1 (fr) 2016-10-19

Family

ID=49887091

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14838812.7A Withdrawn EP3080509A1 (fr) 2013-12-11 2014-12-11 Dispositif et procédure pour la réparation d'une partie d'au moins un tuyau

Country Status (3)

Country Link
EP (1) EP3080509A1 (fr)
IT (1) ITMI20132061A1 (fr)
WO (1) WO2015087362A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0564741T3 (da) * 1992-04-07 1999-07-19 Ashimori Ind Co Ltd Fremgangsmåde og apparat til at reparere en rørledning, og egnet reparationsmateriale
EP0605085A1 (fr) * 1992-12-29 1994-07-06 SUMIYOSHI MANUFACTURING Co. Ltd. Méthode et appareil pour la réparation de la surface interne d'un tuyau par revêtement de résine
US6068725A (en) * 1997-11-26 2000-05-30 Insituform (Netherlands) B.V. Method of installation of a flexible cured in place lateral seal in an existing main pipeline

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2015087362A1 *

Also Published As

Publication number Publication date
ITMI20132061A1 (it) 2015-06-12
WO2015087362A1 (fr) 2015-06-18

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