EP2230021B1 - A device for applying an internal coating in tubes - Google Patents

A device for applying an internal coating in tubes Download PDF

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Publication number
EP2230021B1
EP2230021B1 EP09155432A EP09155432A EP2230021B1 EP 2230021 B1 EP2230021 B1 EP 2230021B1 EP 09155432 A EP09155432 A EP 09155432A EP 09155432 A EP09155432 A EP 09155432A EP 2230021 B1 EP2230021 B1 EP 2230021B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
coating material
mixing
tube
casing
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.)
Active
Application number
EP09155432A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2230021A1 (en
Inventor
Rolf Johansson
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.)
Proline AB
Original Assignee
Proline AB
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
Priority to SI200930369T priority Critical patent/SI2230021T1/sl
Application filed by Proline AB filed Critical Proline AB
Priority to ES09155432T priority patent/ES2392129T3/es
Priority to PL09155432T priority patent/PL2230021T3/pl
Priority to DK09155432.9T priority patent/DK2230021T3/da
Priority to PT09155432T priority patent/PT2230021E/pt
Priority to EP09155432A priority patent/EP2230021B1/en
Publication of EP2230021A1 publication Critical patent/EP2230021A1/en
Application granted granted Critical
Publication of EP2230021B1 publication Critical patent/EP2230021B1/en
Priority to HRP20120842AT priority patent/HRP20120842T1/hr
Priority to CY20121101001T priority patent/CY1113254T1/el
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B05B3/1007—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
    • B05B3/02—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

Definitions

  • the present invention relates to a device for applying an internal coating in tubes according to the preamble of appended claim 1.
  • Water pipes is defined as comprising all types of tubes or pipes that conduct water, also waste water and discharge pipes, larger main pipes in the soil as well as pipes in the heating, water and sanitation system of accommodations.
  • the condition of pipes of this type is impaired with age, and for instance rust in tubes of cast iron tends to create holes in the walls thereof at some exposed locations, which may lead to leakage having sometimes severe consequences, such as costly moisture damages in buildings, leakage of substances being harmful to the environment into the soil and so on.
  • tubes of plastic are changed over a period of time and fissures therein may arise as a consequence of ageing.
  • a series of devices of this type are therefore known, which have any form of slide or carriage that is usually pulled through a tube to be reconditioned while spraying coating material onto the inner wall of the tube through a nozzle arranged at the slide or the carriage.
  • the coating material has to have at least two coating material components, i.e. a component able to form an inner layer or shell inside a said tube and a coating material component in the form of a hardening or curing agent ensuring that said coating mass will efficiently harden once sprayed on the inner wall of said tube.
  • these components have to be mixed for obtaining the coating material to be sprayed by said nozzle. It seems comfortable to obtain such mixing outside a said tube and then feed the premixed coating material to said nozzle.
  • devices of similar type to that defined in the introduction which utilizes this technic and the premixed coating material is then transported through a hose, which may typically have a length of 15-35 meters, to the rotating nozzle.
  • a device according to the introduction is known through US-A-3029027 and althout it is is well functioning and may be used to apply an internal coating in tubes while efficiently mixing at least two coating material components for forming a coating material there is a desire to improve a device of that type.
  • the known device may work well as long as a tube to be internally coated extends substantially straight forward, but if the tube has substantial bends, such as is often the case for pipes in heating, water and sanitation-systems of buildings, it may be difficult to uniformly coat all internal surfaces of such a tube.
  • This object is according to the invention obtained by providing such a device, in which said elongated member is flexible like a metal wire, and in which the transfer means comprises on one hand a shaft with a through hole In which the elongated flexible member is received and having said nozzle as well as said mixing members secured thereto and on the other a screw to be tightened for fixing the elongated member to this shaft.
  • the elongated member which may be a metal wire
  • Such loosening of the screw means that the elongated flexible member may be retracted from said shaft and by that at the same time be disconnected with respect to the nozzle and the mixing members secured to that shaft.
  • said driving means is configured to make said elongated flexible member and thereby the nozzle to rotate with a rotation speed with a number of revolutions of 800-20000 rpm, preferable 4000-15000 rpm, which are suitable rotation speeds for a nozzle in a device of this type.
  • said elongated flexible member is a metal wire.
  • the device comprises means configured to enable pulling of the nozzle together with said mixing casing through a tube with a nozzle being a part of the device coming at the end of the movement through the tube.
  • This way of moving the device through a said tube is preferred, since no means for driving the nozzle and mixing casing forwards are then to be arranged in connection therewith and it may be ensured that parts of the device, such as the mixing casing, will not risk to touch coating material already sprayed by said nozzle on inner walls of a said tube.
  • said feeding means is configured to feed at least a first component in the form of a hardening or curing agent and a second component in the form of a coating mass to said mixing casing.
  • Said feeding means may then be configured to feed a coating mass comprising a polyester to said mixing casing, and said polyester is according to another embodiment of the invention a glass flake or glass fiber reinforced polyester, which results in a preferred coating material layer inside a said tube.
  • a polyester is comparatively difficult to mix, and here is the present invention particularly efficient and advantageous.
  • said nozzle comprises a wall delimiting a space for receiving said mixed coating material, and said delimiting wall tapers the cross-section of said space towards a free end of the nozzle located remotely with respect to said feeding means.
  • the coating material will by this design of the nozzle move away from said free end when the nozzle is rotated for being sprayed out towards a said inner wall of a tube.
  • This design of the space of the nozzle also makes it possible to design the nozzle so that it may be moved through thin tubes, i.e. tubes having small inner diameters, without any risk that the nozzle will with an edge thereof hit the inner wall of the tube when moving through bends and sharp curves.
  • said nozzle has at least one aperture in said delimiting wall, and this aperture is directed substantially radially with respect to an axis of rotation of the nozzle and at a distance from said free end for throwing said coating material through this aperture out from the nozzle towards tube walls.
  • Fig 1 shows a prior art device as known through WO 97/01724 for applying an internal coating onto inner walls 1' of a tube 2', and the function of this prior art device will now be briefly explained for facilitating the understanding of the present invention, although this device is not of the same type as that according to the present invention.
  • This device has a hose 3' feeding a coating material to a nozzle 4'.
  • the nozzle is driven to rotate by being connected to an elongated flexible member 5' such as a metal wire. The rotation of the nozzle will cause the coating material to be thrown outwards towards said inner walls 1' of the tube while resulting in a coating layer 6' thereon.
  • the nozzle is pulled through a said tube while applying a said coating layer 6' onto the inner walls thereof and by that reconditioning the pipe by for instance covering through holes 7' therein. It is shown that the device has a member 8' used for centering the nozzle 4' when pulled through the tube.
  • the coating material sprayed onto said inner walls contains a coating mass and a hardening or curing agent resulting in a hardening of the coating material for forming a rigid inner wall layer inside the already existing tube.
  • the device comprises means 10, 11 in the form of containers providing a supply of an hardening or curing agent (container 10) and a coating mass (container 11) of a suitable material, such as a polyester, and more especially a glass flake reinforced polyester.
  • the device further comprises means configured to feed these two coating material components to a mixing casing 12 of the device, and these feeding means comprise a pump 13 schematically indicated and a flexible hose 14, 15 leading from each container 10, 11 to said mixing casing for separately feeding the two coating material components to the mixing casing.
  • the device further comprises a nozzle 16 arranged in connection with the mixing casing and driving means 17 in the form of a suitable motor connected to said nozzle 16 through an elongated flexible member 18, such as a metal wire, for rotating this member and by that the nozzle 16 for throwing a coating material mixture received by the nozzle 16 from the mixing casing substantially radially with respect to the rotation axis of the nozzle outwards towards inner walls of a tube, when the nozzle and the mixing casing is arranged in a said tube.
  • a nozzle 16 arranged in connection with the mixing casing and driving means 17 in the form of a suitable motor connected to said nozzle 16 through an elongated flexible member 18, such as a metal wire, for rotating this member and by that the nozzle 16 for throwing a coating material mixture received by the nozzle 16 from the mixing casing substantially radially with respect to the rotation axis of the nozzle outwards towards inner walls of a tube, when the nozzle and the mixing casing is arranged in a said tube.
  • Fig 3 shows how said elongated flexible member in the form of a metal wire 18 surrounded by a protecting jacket 19 of a suitable material, such as plastic, is fixed with respect to rotation to a shaft 20 with an inner through hole 21 in which the wire 18 is received.
  • a screw 22 tightened for fixing the wire 18 to the shaft 20 will by this ensure a transfer of the rotation movement of the wire 18 to the shaft 20 and by that to the nozzle 16 secured to the end of said shaft.
  • the shaft is journalled in bearings 23 received in the mixing casing 12 body.
  • the mixing casing has a mixing compartment 24 with inlets 25, 26 for said coating material components fed thereto through the hoses 14 and 15 and at least one outlet 27 for draining coating material mixed inside said mixing compartment 24 to said nozzle 16.
  • Mixing members 28, 29 are secured to said shaft 20 for rotating therewith and by that intimately mix the coating material components arriving to the mixing compartment 24 so as to form an homogenous coating material leaving said compartment through the outlet 27.
  • the nozzle 16 comprises a wall 30 delimiting a space 31 for receiving said mixed coating material.
  • the delimiting wall tapers the cross-section of said space towards a free end 32 of the nozzle located remotely with respect to the feeding means 13-15.
  • the nozzle has an opening or aperture 33 in said delimiting wall, more exactly where this ends, and this aperture is directed substantially radially with respect to an axis of rotation of the nozzle and at a distance from said free end 32 for throwing said coating material through this aperture out from the nozzle towards tube walls when the nozzle is rotated by rotation of the wire 18 through the driving means (motor) 17, which preferably rotates the wire and by that the nozzle with a rotation speed of 800-20000 rpm, here about 11000 rpm.
  • the nozzle 16 and mixing casing 12 are pulled through a tube to be coated by said coating material, and the device may include further means for obtaining this not shown in the figures. However, it is also within the scope of the invention to move the nozzle in any other conceivable way through a said tube, and the device may even carry out its task while, temporally, being in a fixed position with respect to said tube.
  • the coating material components are fed separately from the containers 10, 11 through the hoses 14, 15 to the mixing compartment 24, where they are mixed through the stirring action of the mechanical stirrers constituted by the mixing members 28, 29 driven to rotate by the rotation of the elongated flexible member 18 causing at the same time the nozzle 16 to rotate.
  • Coating material components mixed to a homogenous mixture will leave the compartment 24 through the outlet 27 and entering the space 31 of the nozzle for migrating to the aperture 33 for being thrown substantially radially with the respect to the rotation axis of the nozzle towards inner walls of a said tube for harden and forming a strong internal coating layer inside the tube thanks to the curing agent in the coating material.
  • the device according to the invention is suited for internally coating all types of tubes or pipes, also pipes for transporting drinking water, such as coarse feeding pipes therefore, and there is then a problem to firstly remove lime depositions in such pipes.
  • the coating material has in such a case to have such characteristics that there is not the slightest risk that it will after a period of time have any negative influence upon the quality of the water transported therein.
  • the tube may for instance also be a duct used for ventilation.
  • Tubes may also have another cross-section than a circular one, such as square, and “diameter” relates in such a case to the length of a cross-section dimension.

Landscapes

  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Nozzles (AREA)
EP09155432A 2009-03-18 2009-03-18 A device for applying an internal coating in tubes Active EP2230021B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
ES09155432T ES2392129T3 (es) 2009-03-18 2009-03-18 Dispositivo para aplicar un revestimiento interno en tubos
PL09155432T PL2230021T3 (pl) 2009-03-18 2009-03-18 Urządzenie do nakładania powłoki wewnętrznej w rurach
DK09155432.9T DK2230021T3 (da) 2009-03-18 2009-03-18 Indretning til påføring af en indre belægning i rør
PT09155432T PT2230021E (pt) 2009-03-18 2009-03-18 Dispositivo para aplicação de um revestimento interno em tubos
SI200930369T SI2230021T1 (sl) 2009-03-18 2009-03-18 Naprava za nanašanje notranje prevleke v ceveh
EP09155432A EP2230021B1 (en) 2009-03-18 2009-03-18 A device for applying an internal coating in tubes
HRP20120842AT HRP20120842T1 (hr) 2009-03-18 2012-10-19 Naprava za nanošenje unutarnjeg premaza u cijevima
CY20121101001T CY1113254T1 (el) 2009-03-18 2012-10-23 Διαταξη για επαλειψη εσωτερικου επιχρισματος σε σωληνες

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09155432A EP2230021B1 (en) 2009-03-18 2009-03-18 A device for applying an internal coating in tubes

Publications (2)

Publication Number Publication Date
EP2230021A1 EP2230021A1 (en) 2010-09-22
EP2230021B1 true EP2230021B1 (en) 2012-07-25

Family

ID=40568140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09155432A Active EP2230021B1 (en) 2009-03-18 2009-03-18 A device for applying an internal coating in tubes

Country Status (8)

Country Link
EP (1) EP2230021B1 (es)
CY (1) CY1113254T1 (es)
DK (1) DK2230021T3 (es)
ES (1) ES2392129T3 (es)
HR (1) HRP20120842T1 (es)
PL (1) PL2230021T3 (es)
PT (1) PT2230021E (es)
SI (1) SI2230021T1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2616926C1 (ru) * 2016-04-07 2017-04-18 Акционерное общество "Научно-производственное объединение "СПЛАВ" Установка для нанесения покрытия на внутреннюю поверхность труб

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2008027C2 (nl) * 2011-12-23 2013-06-26 Reno Pipe B V Inrichting voor het aanbrengen van een uithardbare kunststoflaag in een buisvormige constructie en een werkwijze.
RU2533492C1 (ru) * 2013-06-27 2014-11-20 Открытое акционерное общество "Научно-производственное объединение "СПЛАВ" Установка для нанесения покрытия на внутреннюю поверхность труб
US10456804B2 (en) 2014-09-23 2019-10-29 Sika Technology Ag Application device
US11607705B2 (en) * 2016-04-29 2023-03-21 Michael Kronz Air purging apparatus for a coater
EP3615225A4 (en) * 2017-04-27 2021-02-24 Michael Kronz COATING DEVICE
CN112191381A (zh) * 2020-10-20 2021-01-08 福建工程学院 用于管道消毒离心式旋转喷嘴及工作方法
CN117225627B (zh) * 2023-11-13 2024-03-08 山东之华管业有限公司 一种大口径沟槽管件内涂塑装置及其涂塑方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029027A (en) * 1957-08-12 1962-04-10 Pittsburgh Chemical Company Apparatus for coating pipe surfaces
US3233580A (en) * 1962-11-05 1966-02-08 Plastic Materials Inc Material mixing and applying apparatus
JPS5486818A (en) 1977-12-21 1979-07-10 Kankyo Kaihatsu Kk Method of regenerating water pipe laid and device for painting inside surface of same pipe in said method
GB2160289B (en) 1984-06-14 1987-09-23 British Gas Corp Spray-sealing of pipes
GB8629217D0 (en) 1986-12-06 1987-01-14 Tate Pipe Lining Process Ltd Lining pipes
SE504663C2 (sv) 1995-06-28 1997-03-24 Sten Edstroem Anordning för applicering av en invändig beläggning i rör som innefattar ett munstycke med radiella öppningar
GB9524811D0 (en) * 1995-12-05 1996-02-07 Amec Utilities Ltd Method and apparatus for coating the interior of a pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2616926C1 (ru) * 2016-04-07 2017-04-18 Акционерное общество "Научно-производственное объединение "СПЛАВ" Установка для нанесения покрытия на внутреннюю поверхность труб

Also Published As

Publication number Publication date
PT2230021E (pt) 2012-10-31
HRP20120842T1 (hr) 2012-11-30
PL2230021T3 (pl) 2012-12-31
EP2230021A1 (en) 2010-09-22
SI2230021T1 (sl) 2012-12-31
DK2230021T3 (da) 2012-10-22
CY1113254T1 (el) 2016-04-13
ES2392129T3 (es) 2012-12-04

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