EP0846239A1 - Lining of pipes - Google Patents

Lining of pipes

Info

Publication number
EP0846239A1
EP0846239A1 EP96925910A EP96925910A EP0846239A1 EP 0846239 A1 EP0846239 A1 EP 0846239A1 EP 96925910 A EP96925910 A EP 96925910A EP 96925910 A EP96925910 A EP 96925910A EP 0846239 A1 EP0846239 A1 EP 0846239A1
Authority
EP
European Patent Office
Prior art keywords
spray head
lining
pipe
axis
carrier
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Withdrawn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
EP96925910A
Other languages
German (de)
French (fr)
Inventor
Samuel Leslie Talbot
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.)
Fosroc International Ltd
Original Assignee
Fosroc International Ltd
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 Fosroc International Ltd filed Critical Fosroc International Ltd
Publication of EP0846239A1 publication Critical patent/EP0846239A1/en
Withdrawn legal-status Critical Current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
    • F16L55/16—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
    • 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
    • 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

Definitions

  • the invention relates to the lining of pipes, more especially pipes which are to convey potable water, sewage, gas; or the like.
  • the lining is typically a synthetic resin such as an epoxy resin.
  • DT-A-2,448,932, GB-A-2,218,773A and GB-A-2,065,263A disclose pipe-lining apparatus in which an annular body of lining hquid is formed around the periphery of the lining apparatus and confined by the pipe interior. Hence hquid in contact with the interior is deposited thereon as the apparatus advances through the bore ofthe pipe.
  • a lining composition typically mixed resin and hardener therefor, is pumped to the head which is rotated at such speed that the particles are atomised and apphed to the surface to be lined.
  • the head is normally in the form of a cylindrical drum which is rotated about its axis and discharges the lining composition through perforations in its cylindrical wall.
  • Such apparatus works well in the case of small diameter pipes but is not sufficiently effective where the diameter is larger and/or it is essential that there are no gaps in the lining.
  • GB-A-865,301 and DE-A-4,400,166 disclose pipe-lining apparatus comprising a carrier adapted to travel through a pipe to be lined, a supply line for feeding lining composition to be sprayed to a spray head located on the carrier, and means for rotating the spray head about the pipe's axis.
  • the present invention provides pipe-lining apparatus as in the above summary, characterised in that the spray head has a generally annular surface whose axis is ahgned with the axis of rotation of the spray head, the surface having an outer peripheral edge portion which is arranged to eject the lining material.
  • the supply line is arranged to feed a film of lining material in the axial direction over the surface towards the edge portion.
  • the apparatus comprises two or more such spray heads axially spaced apart and arranged to apply respective superimposed layers of lining material as the carrier travels through the pipe to be lined.
  • the present invention also provides a method in which the spray head has a generally annular surface whose axis is ahgned with the axis of rotation of the spray head, the surface having an outer peripheral edge portion which is arranged to eject the lining material.
  • the invention also provides a spray head for pipe lining apparatus, the spray head being characterised by a generally disc-shaped floor having an upstanding generally cylindrical side wall which is shaped to direct atomised lining composition radially outwardly ofthe wall when rotated about its axis.
  • a spraying assembly may comprise at least two spray heads, each comprising a generally disc shaped floor having an upstanding side wall, which is shaped to direct atomised lining composition outwardly of the wall.
  • the side wall preferably has an outwardly flared upper portion. Additionally or alternatively, holes are present in the side wall.
  • the head may for example range from say 50mm to about 350mm in diameter.
  • Figure 1 is a general view of one embodiment of apparatus ofthe invention
  • Figure 2A is an end elevation of an assembly of two heads for use in the apparatus of Figure 1 ;
  • Figure 2B is a partial longitudinal section taken on lines IIB-IIB of Figure 2A;
  • Figures 3 to 5 are longitudinal sections of other spray head assemblies useful in
  • Figure 6 is a diagrammatic plan view ofthe apparatus of Figure 1.
  • the lining machine shown in Figure 1 comprises the usual air compressor and generator unit 1, pump unit 2 and reservoirs 3, 4 of unhardened resin and hardener therefor.
  • Hose supply lines 3A, 4A from the reservoirs are coiled about a winch reel 5 and extend forward to a carrier 6 dimensioned to pass through the pipe P to be lined.
  • the carrier 6 comprises a trolley 7 which may have wheels or skids by which it passes through the pipe P and carries an inline static mixer 8 into which the hose supply pipelines feed.
  • a motor 9 is present to rotate a spray head assembly H made up of a number of spray heads HI, H2, shown in Figure 1.
  • the heads may be made of aluminium or the like.
  • each head is a disc 10, having an upstanding sidewall rim 11.
  • a supply line 12 from the mixer 8 extends axially of the heads, and has side holes 13 adjacent the floor of each head.
  • the inside of the upper portion 14 of the rim 11 is outwardly inclined as shown, and shoulders 15 are present to receive bolts 16 by which one head may be secured to the next (as shown in Figure 2B, the shoulders 15 are only present in the head HI).
  • mixed resin composition emerging from the holes 13 is directed (as indicated by path 20) along the floor of the respective heads, and up the rim 11 to be atomised and thrown out as a spray 21 from the outer peripheral edge portion ofthe rim on to the surface of the pipe P to be lined. Because there are two heads in line, two layers of lining are apphed in succession, so guaranteeing that the lining is complete, which is particularly important when the material to be conveyed through the pipe is potable water.
  • the two heads HI and H2 have generally dished floors.
  • the floor 10A of the head HI may be curved, to influence the passage of composition to be lined.
  • three heads HI, H2, H3, may be present with shoulders 15 being present in heads HI and H2.
  • the rim I IA may have holes 17 so that the atomised particles can emerge from the sides ofthe head instead of or additional to that passed out along the portion 14 ofthe rim.
  • the dimensions of the heads and/or the rate of rotation and viscosity of the lining composition may be adjusted relative to each other to control the rate of apphcation of the lining, in known manner.
  • the pipe to be lined is built up of lengths of conduit joined together and may be made of concrete, plastics, metal; or the like.
  • the carrier 6 is shown connected via resin and hardener supply
  • the air line 19 supphes compressed air to drive pneumatic motor 9 on the carrier and is connected to an air supply line 20.
  • the resin, hardener and air supply hoses lead to the reel 5 and can be fed out under the control of a gearbox and motor 21 , clutch 22 and further gearbox 23 to the carrier 6 as the latter is drawn through the pipe by a ferret winch 24 (connected to a line, not shown, attached to the carrier).
  • the apparatus is controlled from a control panel 27.
  • the temperature (and hence the viscosity of the resin and hardener) can be controlled by a fan heater 25 and a fan cooler 26.
  • the invention is not limited to the embodiments shown. There may be more than three heads: one may be offset from the other (or others); the resin need not be epoxy.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Nozzles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Spray Control Apparatus (AREA)

Abstract

Two spray heads (H1, H2) are present for use in lining a pipe (P1), the heads being arranged in line and arranged to apply composition in succession to the inner surface of the pipe.

Description

LINING OF PIPES
The invention relates to the lining of pipes, more especially pipes which are to convey potable water, sewage, gas; or the like. The lining is typically a synthetic resin such as an epoxy resin.
DT-A-2,448,932, GB-A-2,218,773A and GB-A-2,065,263A disclose pipe-lining apparatus in which an annular body of lining hquid is formed around the periphery of the lining apparatus and confined by the pipe interior. Hence hquid in contact with the interior is deposited thereon as the apparatus advances through the bore ofthe pipe.
It is known to pull a lining machine through a pipe to be lined, the machine carrying a spray head and mixer for the lining composition to be sprayed on to the surface to be lined. A lining composition, typically mixed resin and hardener therefor, is pumped to the head which is rotated at such speed that the particles are atomised and apphed to the surface to be lined. In the machines currently available the head is normally in the form of a cylindrical drum which is rotated about its axis and discharges the lining composition through perforations in its cylindrical wall. Such apparatus works well in the case of small diameter pipes but is not sufficiently effective where the diameter is larger and/or it is essential that there are no gaps in the lining. GB-A-865,301 and DE-A-4,400,166 disclose pipe-lining apparatus comprising a carrier adapted to travel through a pipe to be lined, a supply line for feeding lining composition to be sprayed to a spray head located on the carrier, and means for rotating the spray head about the pipe's axis.
The present invention provides pipe-lining apparatus as in the above summary, characterised in that the spray head has a generally annular surface whose axis is ahgned with the axis of rotation of the spray head, the surface having an outer peripheral edge portion which is arranged to eject the lining material.
Preferably the supply line is arranged to feed a film of lining material in the axial direction over the surface towards the edge portion.
Preferably the apparatus comprises two or more such spray heads axially spaced apart and arranged to apply respective superimposed layers of lining material as the carrier travels through the pipe to be lined.
Other preferred features are defined in the dependent Claims.
The present invention also provides a method in which the spray head has a generally annular surface whose axis is ahgned with the axis of rotation of the spray head, the surface having an outer peripheral edge portion which is arranged to eject the lining material. The invention also provides a spray head for pipe lining apparatus, the spray head being characterised by a generally disc-shaped floor having an upstanding generally cylindrical side wall which is shaped to direct atomised lining composition radially outwardly ofthe wall when rotated about its axis.
A spraying assembly may comprise at least two spray heads, each comprising a generally disc shaped floor having an upstanding side wall, which is shaped to direct atomised lining composition outwardly of the wall. The side wall preferably has an outwardly flared upper portion. Additionally or alternatively, holes are present in the side wall.
The head may for example range from say 50mm to about 350mm in diameter.
In order that the invention may be well understood it will now be described by way of example only with reference to the accompanying diagrammatic drawings in which
Figure 1 is a general view of one embodiment of apparatus ofthe invention;
Figure 2A is an end elevation of an assembly of two heads for use in the apparatus of Figure 1 ; Figure 2B is a partial longitudinal section taken on lines IIB-IIB of Figure 2A; Figures 3 to 5 are longitudinal sections of other spray head assemblies useful in
the apparatus and method ofthe invention; and
Figure 6 is a diagrammatic plan view ofthe apparatus of Figure 1.
The same reference numerals are used where possible in describing the different embodiments, with the addition of a suffix.
The lining machine shown in Figure 1 comprises the usual air compressor and generator unit 1, pump unit 2 and reservoirs 3, 4 of unhardened resin and hardener therefor. Hose supply lines 3A, 4A from the reservoirs are coiled about a winch reel 5 and extend forward to a carrier 6 dimensioned to pass through the pipe P to be lined. The carrier 6 comprises a trolley 7 which may have wheels or skids by which it passes through the pipe P and carries an inline static mixer 8 into which the hose supply pipelines feed. A motor 9 is present to rotate a spray head assembly H made up of a number of spray heads HI, H2, shown in Figure 1. The heads may be made of aluminium or the like.
As shown in Figure 2, each head is a disc 10, having an upstanding sidewall rim 11. A supply line 12 from the mixer 8 extends axially of the heads, and has side holes 13 adjacent the floor of each head. The inside of the upper portion 14 of the rim 11 is outwardly inclined as shown, and shoulders 15 are present to receive bolts 16 by which one head may be secured to the next (as shown in Figure 2B, the shoulders 15 are only present in the head HI). When the heads are rotated (at up to say 10,000 RPM), mixed resin composition emerging from the holes 13 is directed (as indicated by path 20) along the floor of the respective heads, and up the rim 11 to be atomised and thrown out as a spray 21 from the outer peripheral edge portion ofthe rim on to the surface of the pipe P to be lined. Because there are two heads in line, two layers of lining are apphed in succession, so guaranteeing that the lining is complete, which is particularly important when the material to be conveyed through the pipe is potable water.
In the embodiment of Figure 2, the two heads HI and H2 have generally dished floors. As shown in Figure 3, the floor 10A of the head HI may be curved, to influence the passage of composition to be lined. As shown in Figure 4, three heads HI, H2, H3, may be present with shoulders 15 being present in heads HI and H2. As shown in Figure 5 the rim I IA may have holes 17 so that the atomised particles can emerge from the sides ofthe head instead of or additional to that passed out along the portion 14 ofthe rim.
The dimensions of the heads and/or the rate of rotation and viscosity of the lining composition may be adjusted relative to each other to control the rate of apphcation of the lining, in known manner.
The pipe to be lined is built up of lengths of conduit joined together and may be made of concrete, plastics, metal; or the like. Referring to Figure 6, the carrier 6 is shown connected via resin and hardener supply
hoses 3A and 4A and an air hose 19 to a trailer unit 18 on which the generator/compressor unit 1, resin and hardener tanks 3 and 4, hose reel 5 and associated king pump 2 and other equipment are mounted. The air line 19 supphes compressed air to drive pneumatic motor 9 on the carrier and is connected to an air supply line 20.
As shown, the resin, hardener and air supply hoses lead to the reel 5 and can be fed out under the control of a gearbox and motor 21 , clutch 22 and further gearbox 23 to the carrier 6 as the latter is drawn through the pipe by a ferret winch 24 (connected to a line, not shown, attached to the carrier). The apparatus is controlled from a control panel 27.
The temperature (and hence the viscosity of the resin and hardener) can be controlled by a fan heater 25 and a fan cooler 26.
The invention is not limited to the embodiments shown. There may be more than three heads: one may be offset from the other (or others); the resin need not be epoxy.

Claims

1. Pipe lining apparatus comprising a carrier (6) adapted to travel through a pipe (P) to be lined, a lining composition supply line (3a,4a) for feeding composition to be sprayed to a spray head (HI ,H2,H3) located on the carrier, and means (9) for rotating the spray head about the pipe axis, characterised in that the spray head (H1,H2,H3) has a generaUy annular surface whose axis is ahgned with the axis of rotation ofthe spray head, said surface having an outer peripheral edge portion (14) which is arranged to eject the lining material.
2. Apparatus as claimed in Claim 1 , wherein the supply line (3a,4a) is arranged to feed a film of lining material in the axial direction over the surface towards the edge portion (14).
3. Apparatus as claimed in Claim 1 or Claim 2, wherein the edge portion (14) includes an edge arranged to eject atomised lining material.
4. Apparatus as claimed in any preceding Claim, comprising two or more such spray heads (H1,H2,H3) axiaUy offset and arranged to apply respective superimposed layers of lining material as the carrier travels (6) through the pipe (P) to be lined.
5. Apparatus as claimed in Claim 4, wherein one spray head (HI ) has ledge means (15) within its mouth on which another spray head (H2) is supported.
6. A method of lining a pipe, comprising moving a carrier (6) having a spray head (H1,H2) longitudinaUy through the pipe (P) whilst rotating the spray head about a longitudinal axis and feeding lining composition to the spray head, thereby spraying the lining composition onto the interior surface of the pipe, characterised in that the spray head (H1,H2) has a generaUy annular surface whose axis is ahgned with the axis of rotation of the spray head, the surface having an peripheral edge portion (14) which is arranged to eject the lining material.
7. A spray head (H1,H2,H3) for pipe lining apparatus, characterised by a generaUy disc-shaped floor (10) having an upstanding generaUy cylindrical side waU (11) which is shaped to direct atomised lining composition radiaUy outwardly ofthe waU when rotated about its axis.
8. A spray head (H1,H2,H3) as claimed in Claim 1, wherein shoulders (15) or a ledge are formed on the inside surface ofthe upstanding waU and are arranged to receive the floor of an adjacent spray head.
EP96925910A 1995-08-08 1996-07-31 Lining of pipes Withdrawn EP0846239A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9516211 1995-08-08
GB9516211A GB2304167A (en) 1995-08-08 1995-08-08 Lining insides of pipes
PCT/GB1996/001867 WO1997006382A1 (en) 1995-08-08 1996-07-31 Lining of pipes

Publications (1)

Publication Number Publication Date
EP0846239A1 true EP0846239A1 (en) 1998-06-10

Family

ID=10778918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96925910A Withdrawn EP0846239A1 (en) 1995-08-08 1996-07-31 Lining of pipes

Country Status (8)

Country Link
EP (1) EP0846239A1 (en)
CN (1) CN1193381A (en)
AU (1) AU6626796A (en)
CZ (1) CZ36498A3 (en)
GB (1) GB2304167A (en)
NO (1) NO980501L (en)
WO (1) WO1997006382A1 (en)
ZA (1) ZA966701B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110260091A (en) * 2019-05-06 2019-09-20 常州市捷甲非开挖管道技术有限公司 A kind of urban Underground pipeline whirl spraying repair apparatus
IT201900011901A1 (en) * 2019-07-16 2021-01-16 Saipem Spa SYSTEM AND METHOD FOR COATING A JOINT OF A PIPE INTERNALLY IN THE FIELD
CN110886372A (en) * 2019-11-16 2020-03-17 北京密云水泥制品有限责任公司 Automatic cement mortar smearing machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB865301A (en) * 1959-01-16 1961-04-12 Cie De Pont A Mousson Improvements in and relating to method for lining a mould for centrifugal casting
US4252763A (en) * 1978-06-06 1981-02-24 Raymond International Builders, Inc. Method and apparatus for cement lining of pipes
GB2123714B (en) * 1982-02-01 1985-09-18 Raymond Int Builders Method and apparatus for lining of pipes
GB8828928D0 (en) * 1988-12-12 1989-01-25 Chemence Ltd A method for internally coating pipes
DE9214300U1 (en) * 1991-12-21 1993-05-06 Maschinenfabrik Friedewald GmbH, 5241 Friedewald Coating device for concrete and steel pipe systems for pipe renovation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9706382A1 *

Also Published As

Publication number Publication date
GB2304167A (en) 1997-03-12
AU6626796A (en) 1997-03-05
WO1997006382A1 (en) 1997-02-20
CN1193381A (en) 1998-09-16
NO980501D0 (en) 1998-02-05
NO980501L (en) 1998-03-25
GB9516211D0 (en) 1995-10-11
ZA966701B (en) 1997-02-17
CZ36498A3 (en) 1998-06-17

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