WO2001022432A1 - Apparatus for curing an ultraviolet light curable repair material - Google Patents

Apparatus for curing an ultraviolet light curable repair material Download PDF

Info

Publication number
WO2001022432A1
WO2001022432A1 PCT/GB2000/003641 GB0003641W WO0122432A1 WO 2001022432 A1 WO2001022432 A1 WO 2001022432A1 GB 0003641 W GB0003641 W GB 0003641W WO 0122432 A1 WO0122432 A1 WO 0122432A1
Authority
WO
WIPO (PCT)
Prior art keywords
ultraviolet light
repair material
light sources
end caps
sheath
Prior art date
Application number
PCT/GB2000/003641
Other languages
French (fr)
Inventor
Philip John De Rosa
Börje Persson
Original Assignee
Thames Water Services Limited
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 Thames Water Services Limited filed Critical Thames Water Services Limited
Priority to AU74354/00A priority Critical patent/AU7435400A/en
Publication of WO2001022432A1 publication Critical patent/WO2001022432A1/en

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
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/0065—Heat treatment
    • B29C63/0069—Heat treatment of tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation

Definitions

  • the present invention relates to apparatus for curing an ultraviolet light curable repair material .
  • the apparatus is particularly suitable for lining conduits in need of repair.
  • Conduits located underground deteriorate with age and are susceptible to damage by tree roots and other external influences. Eventually, conduits tend to leak.
  • Lining the conduit may prevent escape of fluids carried by the conduit to the surroundings through the walls of the conduit, and may also prevent egress of fluids in the surroundings through the walls of the conduit into the bore of the conduit. Lining of the conduit will also give additional strength to the walls of the conduit.
  • linings are inserted into underground conduits from access points (such as manholes and excavations). Accessibility through these access points is often restricted - manholes are commonly of fairly narrow diameter.
  • the linings are carried to the location to be repaired by a repair system.
  • the repair system cures the lining In situ .
  • Prior art ultraviolet light repair systems are elongate and rigid. This seriously restricts the maximum length of an individual repair that can be performed in the conduit.
  • a rigid repair apparatus must be sufficiently short to enable it to negotiate a path from the manhole to the conduit, which will generally be perpendicular to the manhole. Therefore, if a large length of a conduit needs to be lined, several separate repairs will have to be performed, which is both time consuming and expensive.
  • the end caps are coupled by rigid bars extending between the end caps of the device. The bars tend to cast a shadow on parts of the lining so that these parts are not properly cured.
  • the present invention seeks to provide an improved apparatus for curing an ultraviolet light curable repair material .
  • an apparatus for curing an ultraviolet curable repair material including two end caps, an ultraviolet radiation transmissive sheath extending between the end caps, and an plurality of ultraviolet light sources extending between the end caps, adjacent ones of the ultraviolet light sources being flexibly- coupled to one another.
  • the end caps are freely moveable with respect to one another.
  • the apparatus may therefore negotiate tight bends, and no restriction is imposed on the overall length of the apparatus.
  • the end caps are rigidly coupled to one another.
  • each of the ultraviolet light sources comprises two end pieces rigidly coupled together for supporting an ultraviolet light emitter. Rigidly coupling the end pieces together provides protection for the individual ultraviolet light emitters.
  • the apparatus in one embodiment, includes two ultraviolet light sources, one end piece of each of said ultraviolet light sources being coupled to a respective one of the end caps of the apparatus, the other end pieces being flexibly coupled together. This allows a path to exist from one end cap of the apparatus to the other, along which electricity for operating the ultraviolet light emitters may pass.
  • an ultraviolet light curable repair material is mounted around the sheath.
  • the sheath may be expandable to bring the ultraviolet light curable repair material into contact with the surface to be repaired, such as the internal surface of an underground conduit .
  • means is provided to transport the apparatus to a location to be repaired.
  • Fig. 1 is a perspective view of the apparatus according to the present invention
  • Fig. 2 is a sectional view of the apparatus of Fig. 1, and
  • Fig. 3 is a small scale diagram of a conduit and its access manholes.
  • the apparatus for curing an ultraviolet light curable repair material comprises two end caps 1, 3.
  • First 5 and second 7 ultraviolet light sources are located in series between the end caps 1 and 3.
  • Each light source 5, 7 comprises two end pieces 9, 11 and 13, 15.
  • Between the end pieces 9 and 11 of the first light source extends an ultraviolet light emitter 17.
  • the end pieces 9 and 11 are rigidly coupled together by bracing members 19 in order to prevent the ultraviolet light emitter from being damaged.
  • the structure of the second light source 7 is generally the same as that of the first light source 5.
  • End piece 9 of the first light source 5 is connected to end cap 1 by a flexible or rigid coupling 21.
  • End piece 11 of the first light source 5 is connected to the end piece 13 of the second light source 7 by a flexible coupling 23.
  • the remaining end piece 15 of the second light source 7 is connected to the other end cap 3 of the apparatus by flexible or rigid coupling 25.
  • the light sources 5 and 7 extend in series between respective end caps 1 and 3 in such a manner that relative movement between the end caps 1 and 3 can occur without causing any damage to the light sources 5 and 7.
  • the connection formed by flexible couplings 21, 23 and 25 between the end caps 1 and 3 accommodates electrical power supply lines (not shown) for powering the ultraviolet light emitters 17.
  • the light sources 5 and 7 are arranged (spaced) such that the light radiating therefrom is substantially the same intensity along the length of the apparatus.
  • a generally cylindrical hollow sheath 27 extends between the end caps 1 and 3, and is fluid-tigntedly secured to the end caps bv series of fluid-ti ⁇ ht bands
  • SUBSTITUTE SHEET (RULE 261 29.
  • the light sources 5 and 7 are accommodated within the sheath 27.
  • the sheath 27 is formed of ultraviolet light transmissive material, and is also flexible.
  • the end pieces 9, 11 and 13, 15, and the bracing members 19 serve to prevent the light emitter 17 directly contacting the sheath. This is advantageous, as the light emitters 17 become very hot in use, and would damage the sheath 27 if they contacted it.
  • FIG. 2 an ultraviolet light curable repair material 31 is shown mounted around the sheath 27 (the repair material is omitted from Fig. 1 for the sake of clarity) .
  • the sheath is expanded, for example, by means of an air pump (not shown).
  • the end caps, and the sheath in its non-expanded form) will be 40% smaller than the diameter of the conduit to be repaired.
  • the members 19 provide the light sources with longitudinal strength to resist forces applied when the sheath is inflated.
  • the repair material 31 When the sheath is in the non-inflated form, the repair material 31 is located around the circumference of the sheath in a pleated form. The pleats unfold as the sheath 27 expands, allowing the repair material to make an effective repair of the entire circumference of the conduit .
  • Fig. 3 shows the repair apparatus located in a conduit 33 to be repaired.
  • the sheath 27 is shown in its expanded con iguration, which urges the repair material 31 against the walls of the conduit 23.
  • Fig. 3 shows the repair apparatus to be fitted with optional slides 35 which centralise the repair apparatus within the conduit 33.
  • Fig. 3 also shows a manhole 37 through which the repair apparatus passes in order to access the conduit 33.
  • the apparatus At the junction 39 of the manhole 37 and the conduit 33 it is necessary for the apparatus to bend through 90°. This degree of flexibility is facilitated by the flexible couplings 21, 23 and 25. It will be appreciated by those skilled in the art that in prior art systems, where flexibility was not provided, the length of repair material 31 that could be deployed at once would be considerably shorter, necessitating several separate repair operations to seal a given length of conduit.
  • the repair material 31 may be of any suitable type that would be known to those skilled in the art.
  • the repair material 31 is impregnated with an uncured resin which, when the liner is in position, is cured by ultraviolet light from the ultraviolet light emitters 17, which light passes through the ultraviolet light transmissive sheath 27.
  • the repair material 31 has an interior barrier (not shown) to prevent adhesion to the inflatable sheath 27.
  • the repair material 31 is attached to the sheath 27 with loose ties 41. These ties 41 break as the sheath 27 is inflated.
  • the apparatus may be drawn into the conduit 33 by any suitable conventional method, such as attaching a cable to one or both of the end caps 1 and 3.
  • any suitable conventional method such as attaching a cable to one or both of the end caps 1 and 3.
  • the couplings 21 and 25 of the light sources 5 and 7 to the end caps 1 and 3 are flexible, these couplings may be rigid.
  • Flexible elongate members may be provided within the sheath 27, which connect the end caps 1 and 3. These give the apparatus additional longitudinal strength.
  • the members may be made of UV transparent material to prevent them casting a shadow.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pipe Accessories (AREA)

Abstract

Apparatus for curing an ultraviolet light curable repair material (31) is described, which is particularly suitable for lining conduits in need of repair. The apparatus comprises ultraviolet light sources (5, 7) accommodated within an expandable sheath (27) which extends between two end caps (1, 3). The light sources (5, 7) are coupled to each other via flexible coupling (23), and each of the light sources is coupled to one of the end caps via couplings (21, 25). The apparatus includes means to transport the apparatus to the desired location.

Description

APPARATUS FOR CURING AN ULTRAVIOLET LIGHT CURABLE REPAIR
MATERIAL
The present invention relates to apparatus for curing an ultraviolet light curable repair material . The apparatus is particularly suitable for lining conduits in need of repair.
Conduits located underground deteriorate with age and are susceptible to damage by tree roots and other external influences. Eventually, conduits tend to leak. As an alternative to excavating the conduit, it is often more economical to line the conduit in order to prolong its useful life. Lining the conduit may prevent escape of fluids carried by the conduit to the surroundings through the walls of the conduit, and may also prevent egress of fluids in the surroundings through the walls of the conduit into the bore of the conduit. Lining of the conduit will also give additional strength to the walls of the conduit.
Commonly such linings are inserted into underground conduits from access points (such as manholes and excavations). Accessibility through these access points is often restricted - manholes are commonly of fairly narrow diameter.
The linings are carried to the location to be repaired by a repair system. The repair system cures the lining In situ .
Prior art ultraviolet light repair systems are elongate and rigid. This seriously restricts the maximum length of an individual repair that can be performed in the conduit. A rigid repair apparatus must be sufficiently short to enable it to negotiate a path from the manhole to the conduit, which will generally be perpendicular to the manhole. Therefore, if a large length of a conduit needs to be lined, several separate repairs will have to be performed, which is both time consuming and expensive. In such prior art systems, the end caps are coupled by rigid bars extending between the end caps of the device. The bars tend to cast a shadow on parts of the lining so that these parts are not properly cured.
The present invention seeks to provide an improved apparatus for curing an ultraviolet light curable repair material .
According to the present invention, there is provided an apparatus for curing an ultraviolet curable repair material, the apparatus including two end caps, an ultraviolet radiation transmissive sheath extending between the end caps, and an plurality of ultraviolet light sources extending between the end caps, adjacent ones of the ultraviolet light sources being flexibly- coupled to one another.
The inherent flexibility of the sheath and the flexible coupling of the ultraviolet light sources results in the end caps being freely moveable with respect to one another. The apparatus may therefore negotiate tight bends, and no restriction is imposed on the overall length of the apparatus. In contrast, in prior art systems, the end caps are rigidly coupled to one another.
Preferably each of the ultraviolet light sources comprises two end pieces rigidly coupled together for supporting an ultraviolet light emitter. Rigidly coupling the end pieces together provides protection for the individual ultraviolet light emitters.
The apparatus, in one embodiment, includes two ultraviolet light sources, one end piece of each of said ultraviolet light sources being coupled to a respective one of the end caps of the apparatus, the other end pieces being flexibly coupled together. This allows a path to exist from one end cap of the apparatus to the other, along which electricity for operating the ultraviolet light emitters may pass.
Conveniently, an ultraviolet light curable repair material is mounted around the sheath.
The sheath may be expandable to bring the ultraviolet light curable repair material into contact with the surface to be repaired, such as the internal surface of an underground conduit .
Advantageously, means is provided to transport the apparatus to a location to be repaired.
For a better understanding of the present invention, an embodiment will now be described by way of example, with reference to the accompanying drawings, in which:
Fig. 1 is a perspective view of the apparatus according to the present invention,
Fig. 2 is a sectional view of the apparatus of Fig. 1, and
Fig. 3 is a small scale diagram of a conduit and its access manholes. The apparatus for curing an ultraviolet light curable repair material comprises two end caps 1, 3. First 5 and second 7 ultraviolet light sources are located in series between the end caps 1 and 3. Each light source 5, 7 comprises two end pieces 9, 11 and 13, 15. Between the end pieces 9 and 11 of the first light source extends an ultraviolet light emitter 17. The end pieces 9 and 11 are rigidly coupled together by bracing members 19 in order to prevent the ultraviolet light emitter from being damaged. The structure of the second light source 7 is generally the same as that of the first light source 5.
End piece 9 of the first light source 5 is connected to end cap 1 by a flexible or rigid coupling 21. End piece 11 of the first light source 5 is connected to the end piece 13 of the second light source 7 by a flexible coupling 23. The remaining end piece 15 of the second light source 7 is connected to the other end cap 3 of the apparatus by flexible or rigid coupling 25. Thus, the light sources 5 and 7 extend in series between respective end caps 1 and 3 in such a manner that relative movement between the end caps 1 and 3 can occur without causing any damage to the light sources 5 and 7. The connection formed by flexible couplings 21, 23 and 25 between the end caps 1 and 3 accommodates electrical power supply lines (not shown) for powering the ultraviolet light emitters 17.
The light sources 5 and 7 are arranged (spaced) such that the light radiating therefrom is substantially the same intensity along the length of the apparatus.
A generally cylindrical hollow sheath 27 extends between the end caps 1 and 3, and is fluid-tigntedly secured to the end caps bv series of fluid-tiσht bands
SUBSTITUTE SHEET (RULE 261 29. The light sources 5 and 7 are accommodated within the sheath 27. The sheath 27 is formed of ultraviolet light transmissive material, and is also flexible.
The end pieces 9, 11 and 13, 15, and the bracing members 19serve to prevent the light emitter 17 directly contacting the sheath. This is advantageous, as the light emitters 17 become very hot in use, and would damage the sheath 27 if they contacted it.
In Fig. 2 an ultraviolet light curable repair material 31 is shown mounted around the sheath 27 (the repair material is omitted from Fig. 1 for the sake of clarity) .
It should be understood that, when the repair apparatus is at the appropriate location where the repair is required, the sheath is expanded, for example, by means of an air pump (not shown). Generally, the end caps, and the sheath (in its non-expanded form) will be 40% smaller than the diameter of the conduit to be repaired. The members 19 provide the light sources with longitudinal strength to resist forces applied when the sheath is inflated.
When the sheath is in the non-inflated form, the repair material 31 is located around the circumference of the sheath in a pleated form. The pleats unfold as the sheath 27 expands, allowing the repair material to make an effective repair of the entire circumference of the conduit .
Fig. 3 shows the repair apparatus located in a conduit 33 to be repaired. In Fig. 3 the sheath 27 is shown in its expanded con iguration, which urges the repair material 31 against the walls of the conduit 23. Fig. 3 shows the repair apparatus to be fitted with optional slides 35 which centralise the repair apparatus within the conduit 33.
Fig. 3 also shows a manhole 37 through which the repair apparatus passes in order to access the conduit 33. At the junction 39 of the manhole 37 and the conduit 33 it is necessary for the apparatus to bend through 90°. This degree of flexibility is facilitated by the flexible couplings 21, 23 and 25. It will be appreciated by those skilled in the art that in prior art systems, where flexibility was not provided, the length of repair material 31 that could be deployed at once would be considerably shorter, necessitating several separate repair operations to seal a given length of conduit.
The repair material 31 may be of any suitable type that would be known to those skilled in the art. The repair material 31 is impregnated with an uncured resin which, when the liner is in position, is cured by ultraviolet light from the ultraviolet light emitters 17, which light passes through the ultraviolet light transmissive sheath 27. Advantageously, the repair material 31 has an interior barrier (not shown) to prevent adhesion to the inflatable sheath 27. The repair material 31 is attached to the sheath 27 with loose ties 41. These ties 41 break as the sheath 27 is inflated.
The apparatus may be drawn into the conduit 33 by any suitable conventional method, such as attaching a cable to one or both of the end caps 1 and 3. Although, in the above embodiment, the couplings 21 and 25 of the light sources 5 and 7 to the end caps 1 and 3 are flexible, these couplings may be rigid.
Flexible elongate members may be provided within the sheath 27, which connect the end caps 1 and 3. These give the apparatus additional longitudinal strength. The members may be made of UV transparent material to prevent them casting a shadow.

Claims

Claims :
1. Apparatus for curing an ultraviolet light curable repair material, the apparatus including two end caps, an ultraviolet radiation transmissive sheath extending between the end caps, and a plurality of ultraviolet light sources extending between the end caps, adjacent ones of the ultraviolet light sources being flexibly coupled to one another .
2. Apparatus according to claim 1, wherein each of the said ultraviolet light sources comprises two end pieces rigidly coupled together for supporting an ultraviolet light emitter.
3. Apparatus according to claim 2, including two of said light sources, one end piece of each of said light sources being coupled to a respective one of said end caps, the other end pieces being flexibly coupled together.
4. Apparatus according to claim 1, 2 or 3, including an ultraviolet light curable repair material mounted around said sheath.
5. Apparatus according to claim 4, wherein said sheath is expandable to bring the ultraviolet light curable repair material into contact with the surface to be repaired.
6. Apparatus according to any one of the preceding claims, including means to transport the apparatus to a location to be repaired.
7. Apparatus for curing an ultraviolet light curable repair material, substantially as hereinbefore described with reference to and/or substantially illustrated in any one of or any combination of the accompanying drawings .
PCT/GB2000/003641 1999-09-24 2000-09-22 Apparatus for curing an ultraviolet light curable repair material WO2001022432A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU74354/00A AU7435400A (en) 1999-09-24 2000-09-22 Apparatus for curing an ultraviolet light curable repair material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9922699.5A GB9922699D0 (en) 1999-09-24 1999-09-24 Apparatus for curing an ultraviolet light curable repair material
GB9922699.5 1999-09-24

Publications (1)

Publication Number Publication Date
WO2001022432A1 true WO2001022432A1 (en) 2001-03-29

Family

ID=10861591

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/003641 WO2001022432A1 (en) 1999-09-24 2000-09-22 Apparatus for curing an ultraviolet light curable repair material

Country Status (3)

Country Link
AU (1) AU7435400A (en)
GB (1) GB9922699D0 (en)
WO (1) WO2001022432A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101230329B1 (en) 2012-03-13 2013-02-15 호용종합건설주식회사 Lamp train unit for uv irratiation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992016784A1 (en) * 1991-03-22 1992-10-01 Inpipe Sweden Ab Method and apparatus of lining a passageway
WO1995029361A1 (en) * 1994-04-26 1995-11-02 Inc Bauchemie Ag Process and device for renewing or repairing pipelines
JPH10160086A (en) * 1996-11-22 1998-06-16 S G C Gesuido Center Kk Pipe inner surface repairing device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992016784A1 (en) * 1991-03-22 1992-10-01 Inpipe Sweden Ab Method and apparatus of lining a passageway
WO1995029361A1 (en) * 1994-04-26 1995-11-02 Inc Bauchemie Ag Process and device for renewing or repairing pipelines
JPH10160086A (en) * 1996-11-22 1998-06-16 S G C Gesuido Center Kk Pipe inner surface repairing device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101230329B1 (en) 2012-03-13 2013-02-15 호용종합건설주식회사 Lamp train unit for uv irratiation

Also Published As

Publication number Publication date
GB9922699D0 (en) 1999-11-24
AU7435400A (en) 2001-04-24

Similar Documents

Publication Publication Date Title
US5706861A (en) Rehabilitation of pipelines and passageways with a flexible liner using an inflatible bladder
EP0450975B1 (en) Lining conduits, and device therefor
EP1719946B1 (en) Liner assembly for pipeline repair and method of installing same
US5203377A (en) Method of repairing a pipeline and apparatus for use in such a method
IE71184B1 (en) Improvements in methods for installing a substantially rigid thermoplastic pipe in an existing conduit
KR102058005B1 (en) Photocurable maintenance and reinforcement method for superannuated pipes using prefabricated lightweight packer apparatus
US20180229404A1 (en) Ultraviolet light curing
KR102082179B1 (en) Air cooling uv lamp machine and method for repairing underground pipe using this same
EP2208920B1 (en) Method of sealing a pipeline and a sealing system
KR102048524B1 (en) Apparatus and method for trenchless repairing of pipe line
KR102094087B1 (en) Apparatus and method for partially repairing pipe of liner high frequency adhesive type
KR102062265B1 (en) Method for installation of uv irradiation device and repair underground water pine by non shrinkable type for maintaining expandability
EP2173967B1 (en) A sealing device for a tubing arrangement
KR102235985B1 (en) Energy saving pipes maintenance and reinforcement apparatus and method using LED light source
WO2001022432A1 (en) Apparatus for curing an ultraviolet light curable repair material
KR102546745B1 (en) A variable optical repair machine and Method for partial repair of underground pipe using this same
GB2479374A (en) A method of lining a pipeline or passageway
KR102058004B1 (en) Prefabricated lightweight packer apparatus for maintenance and reinforcement of superannuated pipes
WO1998055796A1 (en) Apparatus and method for lining of passageways
EP0989929A1 (en) Method and apparatus for curing the lining of a pipe
US20230220941A1 (en) Device and method for repairing pipe with a repair assembly having a lighting assembly
KR20200068333A (en) Apparatus and method for partially repairing pipe of embedded repairs and spray liner formation type
EP0632874A4 (en) Pipeline repair apparatus including expandable forms.
WO2023154379A2 (en) Uv light blanket for the curing of uv - resin saturated material
JPH05340498A (en) Underground line repairing method and underground line repairing device

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP