EP0781606A2 - Verfahren und Vorrichtung zur Beschichtung der Innenwandung eines Rohres - Google Patents

Verfahren und Vorrichtung zur Beschichtung der Innenwandung eines Rohres Download PDF

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Publication number
EP0781606A2
EP0781606A2 EP96307992A EP96307992A EP0781606A2 EP 0781606 A2 EP0781606 A2 EP 0781606A2 EP 96307992 A EP96307992 A EP 96307992A EP 96307992 A EP96307992 A EP 96307992A EP 0781606 A2 EP0781606 A2 EP 0781606A2
Authority
EP
European Patent Office
Prior art keywords
pipe
coating
rotating member
interior
stream
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Withdrawn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
EP96307992A
Other languages
English (en)
French (fr)
Other versions
EP0781606A3 (de
Inventor
Robert Spencer Gunter
Neil Thomas Whittle
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.)
AMEC Utilities Ltd
Hunting Industrial Coatings
Original Assignee
AMEC Utilities Ltd
Hunting Industrial Coatings
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 AMEC Utilities Ltd, Hunting Industrial Coatings filed Critical AMEC Utilities Ltd
Publication of EP0781606A2 publication Critical patent/EP0781606A2/de
Publication of EP0781606A3 publication Critical patent/EP0781606A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1057—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces with at least two outlets, other than gas and cleaning fluid outlets, for discharging, selectively or not, different or identical liquids or other fluent materials on the rotating element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
    • B05B13/0627—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies
    • B05B13/0636—Arrangements of nozzles or spray heads specially adapted for treating the inside of hollow bodies by means of rotatable spray heads or nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member
    • B05B3/1014—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/001—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements incorporating means for heating or cooling, e.g. the material to be sprayed

Definitions

  • the present invention relates to coating the interior of a pipe.
  • a known method of coating the interior of a pipe comprises pushing a collapsed sleeve of solid coating material through the length of pipe and sealing the sleeve against the interior of the pipe.
  • This method presents problems when the length of pipe has a second pipe extending from a pipe junction. The coating will seal off the opening of the second pipe. This makes it necessary for machinery to enter the pipe after it has been coated to reopen the junction by removing the coating which is obscuring the opening to the second pipe.
  • the pipe may be coated with a liquid material which cures on the interior of the pipe to provide a solid coating.
  • the coating is an epoxy resin.
  • the two components of the epoxy resin are mixed before spraying onto the interior of the pipe. To prevent the epoxy curing before it is sprayed, it is necessary to use an epoxy which has a relatively long cure time. However, this presents the problem of the liquid flowing to the bottom of the pipe before it cures.
  • apparatus for coating the interior of a pipe comprising a rotatable member, drive means for rotating the member in use, means for moving the rotating member in use along the pipe and means for directing a stream of a liquid coating onto the rotating member in use whereby the liquid is thrown from the periphery of the rotating member under the action of centrifugal force and coats the interior of the pipe.
  • the liquid coating is directed onto the rotating member by one or more nozzles or spray heads.
  • the apparatus may direct a single stream of liquid only onto the rotatable member. This may be a pre-mixed epoxy resin.
  • the apparatus further comprises means for directing a second stream of a second liquid coating onto the rotatable member. This allows the first and second liquids to be kept separate before being directed (typically in the form of a spray) onto the rotating member, whilst allowing the two liquids to mix thoroughly before being thrown from the periphery of the rotating member onto the interior of the pipe.
  • the first liquid coating comprises a first component of a curable resin and the second liquid coating comprises a second component of the curable resin.
  • the apparatus provides a means of spray coating a pipe with a resin which cures very quickly: of the order of 2 seconds. By keeping the two components of the resin separate before spraying, the apparatus ensures that the resin does not cure before being thrown from the periphery of the rotating member.
  • the rotatable member may vary from a flat disc to a bell dependent on the pipe size, and the streams of liquid coating are directed onto the interior of the bell or the surface of the disc.
  • Typical pipe sizes are 150mm-600mm diameter.
  • the two liquids mix on the sides of the bell or disc before being thrown from its periphery.
  • the mixing time can be controlled by varying the rate of rotation of the bell or disc, the diameter of the bell or disc and/or the angle and length of the sides of the bell.
  • the sides of the bell may be curved or flat in cross-section.
  • the rotation rate of the rotating member and the flow rate of the two streams of liquid coating are typically adjusted such that the two liquids mix on the rotating member, are thrown on to the interior of the pipe in substantially liquid form and subsequently cure on the interior of the pipe.
  • the apparatus is typically mounted on a chassis which is centralised in the pipe by a number of fingers, such as steel spring fingers. Typically there are two sets of fingers, one at each end of the chassis. Each set typically comprises a plurality of fingers (eg five fingers) arrange symmetrically about the axis of the chassis. Alternatively the apparatus may be mounted on an adjustable chassis.
  • the liquid coating is fed to the apparatus via one or more umbilical hoses.
  • the chassis may be pulled along the pipe by the hoses, or propelled by pneumatic power.
  • the coatings comprise respective A and B components of a polyurea coating or epoxy resin coating.
  • the coatings are "fast cure” with cure times less than 60 seconds.
  • the invention extends to a method of coating the interior of a pipe, the method comprising directing a stream of a liquid coating onto a rotating member in the pipe and moving the rotating member along the length of the pipe whereby the liquid is thrown from the periphery of the rotating member under the action of centrifugal force and coats the interior of the pipe.
  • Figure 1 is a side view of an embodiment of coating apparatus according to the present invention.
  • the apparatus is shown coating the interior of a pipe 1 (shown in cross-section) with a polyurea coating 2.
  • the apparatus comprises a spray head 3 (shown disconnected in Figure 2) which is mounted, in use, on a centralising carriage 4 which is centralised in the pipe by two sets of five radially extending equally spaced steel spring fingers, one at either end of the carriage 4.
  • Figure 1 illustrates one finger (5,6) from each set.
  • the spray head 3 is pulled out along the length of the pipe in the direction indicated at 7.
  • a compressed air hose 8 is connected to air motor 9.
  • the compressed air 34 drives the air motor 9 which rotates bell 10 up to 16,500 revolutions per minute (rpm).
  • the base component of a required coating is pumped along base hose 11 and is delivered to the base spraying nozzle 12 (which is located inside the bell 10 and shown in Figure 2) via steel tube 30.
  • the catalyst component of the required coating is pumped along catalyst hose 13 and is delivered to catalyst spraying nozzle 14 via steel tube 31.
  • the diameter of the orifices of nozzles 12,14 is typically 1mm.
  • Bell drive shaft 15 is screwed into the drive shaft 32 of air motor 9.
  • the bell 10 is shown in Figure 3 with hidden parts indicated in dotted lines and with the bell drive shaft 15 removed.
  • the bell drive shaft 15 has a flange 16 which locates in recess 17 at the apex of the bell.
  • a threaded projection 18 on the end of the bell drive shaft 15 extends through opening 19 in the bell head and is secured with a threaded nut 20.
  • the bell 10 has flat sloping sides 21.
  • the sides 21 may be curved either inwardly, or outwardly.
  • the bell is, circular and has a diameter of 49mm and a depth of 29mm. Both parameters may be adjusted, depending on the required coating parameters.
  • Figure 4 shows a view in the direction A (shown in Figure 2) with the bell 10 removed.
  • the spray head 3 and centralising carriage or chassis 4 is located in a pipe to be lined, and connected to compressed air supply hose 18 and base and catalyst hoses 11,13. Compressed air is supplied to the air motor and the bell 10 rotates. When the bell has reached a required rotation rate, liquid coating is sprayed into the bell in the form of a first stream or spray 35 and a second stream or spray 36.
  • the apparatus is pulled out via the supply hoses in the direction 7 shown in Figure 1.
  • the two liquid coating materials introduced into the bell mix within the bell, and centrifugal forces send the combined mixed material along the sloping interior sides 21 of the bell and out at 90° (shown at 22 in Figure 1) towards the pipe.
  • liquid coating does not solidify before it is thrown from the spinning bell 10, to ensure that the bell does not become clogged up with solid material. Conversely it is also important that the liquid coating cures rapidly on the interior of the pipe to prevent the liquid flowing to the bottom of the pipe. The rate at which the spray head is pulled out also clearly effects the thickness of coating.
  • the coating has a gel time of less than 60 seconds to prevent the liquid flowing to the bottom of the pipe.
  • a suitable liquid coating for use in the present invention is a polyurea.
  • Polyureas are typically defined by two components (conventionally known as A and B components) which react to form a polyurea polymer.
  • A-component is an isocyanate (such as a soft block quasi-polymer based on MDI) and the B-component is typically a primary or secondary amine terminated material.
  • the A-component is applied by the base spray head 12, and the B-component is applied by the catalyst spray head 14.
  • the reaction is normally very fast, proceeding to completion within a few seconds without any catalysts.
  • working times (“gel times") are less than 3 seconds.
  • a 300mm diameter pipe with a 6mm thick lining would require a withdrawal rate of 2 metres per minute and a combined flow rate of 11.3 litres per minute heated to 50°C using an 86mm dia bell revolving at 16,500 rpm.

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Moulding By Coating Moulds (AREA)
EP96307992A 1995-12-05 1996-11-05 Verfahren und Vorrichtung zur Beschichtung der Innenwandung eines Rohres Withdrawn EP0781606A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9524811.8A GB9524811D0 (en) 1995-12-05 1995-12-05 Method and apparatus for coating the interior of a pipe
GB9524811 1995-12-05

Publications (2)

Publication Number Publication Date
EP0781606A2 true EP0781606A2 (de) 1997-07-02
EP0781606A3 EP0781606A3 (de) 1997-07-09

Family

ID=10784911

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96307992A Withdrawn EP0781606A3 (de) 1995-12-05 1996-11-05 Verfahren und Vorrichtung zur Beschichtung der Innenwandung eines Rohres

Country Status (2)

Country Link
EP (1) EP0781606A3 (de)
GB (1) GB9524811D0 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999059730A1 (de) * 1998-05-18 1999-11-25 Martin Heinrichs Verfahren und vorrichtung zum aufbringen einer kunststoffschicht auf die innenflächen von hohlkörpern
WO2000045962A2 (de) * 1998-09-11 2000-08-10 Peter Baumgarten Verfahren und vorrichtung zur sanierung von leitungsrohren
EP1174191A1 (de) * 2000-07-21 2002-01-23 Polymer Chemical Company Verfahren und Vorrichtung zum Aufbringen einer aus mindestens zwei Komponenten bestehenden Kunststoffschicht
WO2005049220A1 (en) * 2003-11-20 2005-06-02 Edstroem Sten A method for coating an inner surface of a tube with a cureable layer
WO2006104454A1 (en) 2005-03-28 2006-10-05 Proline Ab Method and arrangement for forming an inner lining within a section of a tube
US7189429B2 (en) 2003-06-09 2007-03-13 E. Wood Limited Method for renovating pipelines
EP2230021A1 (de) * 2009-03-18 2010-09-22 Proline Ab Vorrichtung zum Aufbringen einer Innenbeschichtung in Rohren
WO2013101878A1 (en) * 2011-12-28 2013-07-04 Cerro Flow Products Llc Refrigeration line set fitting and method of using the same to join refrigeration lines to each other
US10960425B2 (en) 2019-03-05 2021-03-30 G.P. Reeves Inc. Mechanism for delivering highly viscous materials for coating an interior surface of a tubular substrate
CN117861913A (zh) * 2024-03-11 2024-04-12 潍坊萨伯特精密转动设备有限公司 一种螺杆泵定子管内壁喷涂设备

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3233580A (en) * 1962-11-05 1966-02-08 Plastic Materials Inc Material mixing and applying apparatus
CH437062A (de) * 1965-09-09 1967-05-31 Lechler Bautenschutzchemie Kg Gerät zum Beschichten der Innenwand von Hohlräumen, insbesondere von Rohrinnenwänden
DE2808903A1 (de) * 1978-03-02 1979-09-06 Karl Reinhard Zeiss Verfahren zum aufbringen eines homogenen kunststoffmantels auf die innenwandung von rohren und vorrichtung zur durchfuehrung des verfahrens
GB2085321A (en) * 1980-09-25 1982-04-28 Noonan Terence James The propulsion of fluent material
US5092265A (en) * 1989-10-23 1992-03-03 Hughes J David Apparatus for applying resin coatings

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999059730A1 (de) * 1998-05-18 1999-11-25 Martin Heinrichs Verfahren und vorrichtung zum aufbringen einer kunststoffschicht auf die innenflächen von hohlkörpern
WO2000045962A2 (de) * 1998-09-11 2000-08-10 Peter Baumgarten Verfahren und vorrichtung zur sanierung von leitungsrohren
WO2000045962A3 (de) * 1998-09-11 2002-09-26 Peter Baumgarten Verfahren und vorrichtung zur sanierung von leitungsrohren
EP1174191A1 (de) * 2000-07-21 2002-01-23 Polymer Chemical Company Verfahren und Vorrichtung zum Aufbringen einer aus mindestens zwei Komponenten bestehenden Kunststoffschicht
US7189429B2 (en) 2003-06-09 2007-03-13 E. Wood Limited Method for renovating pipelines
WO2005049220A1 (en) * 2003-11-20 2005-06-02 Edstroem Sten A method for coating an inner surface of a tube with a cureable layer
EP1866567A4 (de) * 2005-03-28 2011-05-18 Proline Ab Verfahren und anordnung zur herstellung einer innenauskleidung in einem rohrabschnitt
WO2006104454A1 (en) 2005-03-28 2006-10-05 Proline Ab Method and arrangement for forming an inner lining within a section of a tube
EP1866567A1 (de) * 2005-03-28 2007-12-19 Proline Ab Verfahren und anordnung zur herstellung einer innenauskleidung in einem rohrabschnitt
EP2230021A1 (de) * 2009-03-18 2010-09-22 Proline Ab Vorrichtung zum Aufbringen einer Innenbeschichtung in Rohren
WO2013101878A1 (en) * 2011-12-28 2013-07-04 Cerro Flow Products Llc Refrigeration line set fitting and method of using the same to join refrigeration lines to each other
JP2015513641A (ja) * 2011-12-28 2015-05-14 セロ フロー プロダクツ エルエルシーＣｅｒｒｏ Ｆｌｏｗ Ｐｒｏｄｕｃｔｓ Ｌｌｃ 冷却ラインセットフィッティングおよび冷却ラインを互いに接合するために冷却ラインセットフィッティングを使用する方法
US9145992B2 (en) 2011-12-28 2015-09-29 Cerro Flow Products Llc Refrigeration line set fitting and method of using the same to join refrigeration lines to each other
US9638361B2 (en) 2011-12-28 2017-05-02 Rls Llc Refrigeration line set fitting and method of using the same to join refrigeration lines to each other
US10960425B2 (en) 2019-03-05 2021-03-30 G.P. Reeves Inc. Mechanism for delivering highly viscous materials for coating an interior surface of a tubular substrate
CN117861913A (zh) * 2024-03-11 2024-04-12 潍坊萨伯特精密转动设备有限公司 一种螺杆泵定子管内壁喷涂设备

Also Published As

Publication number Publication date
EP0781606A3 (de) 1997-07-09
GB9524811D0 (en) 1996-02-07

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