GB2332257A - Nose cone for use in pipe lining - Google Patents

Nose cone for use in pipe lining Download PDF

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Publication number
GB2332257A
GB2332257A GB9725942A GB9725942A GB2332257A GB 2332257 A GB2332257 A GB 2332257A GB 9725942 A GB9725942 A GB 9725942A GB 9725942 A GB9725942 A GB 9725942A GB 2332257 A GB2332257 A GB 2332257A
Authority
GB
United Kingdom
Prior art keywords
nose cone
pipe
nose
sealant
propriety
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Withdrawn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
GB9725942A
Other versions
GB9725942D0 (en
Inventor
Alan Foster Rogers
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9725942A priority Critical patent/GB2332257A/en
Publication of GB9725942D0 publication Critical patent/GB9725942D0/en
Publication of GB2332257A publication Critical patent/GB2332257A/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Withdrawn legal-status Critical Current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
    • F16L55/18—Appliances for use in repairing pipes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Pipe Accessories (AREA)

Abstract

The nose cone 1 is produced from materials that can be compressed or reduced in form during or after production and remain in their reduced state until some form of external stimulation is applied to return their original shape and dimensions, to provide a tight fit in a pipe. The nose cone is connected to a replacement pipe and the assembly inserted into a live or dead carrier pipe. The nose cone can then be located at any desired point in the carrier pipe. Stimulation is by current passed through an inbuilt heating element 4 that in turn heats up both a main body and tail of the nose cone by an electric cable passed through the replacement pipe. The nose cone may have an O-ring seal and/or fins, sealant may be provided.

Description

2332257 (1) Smart Nose cones During live or dead pipe re lining, some nose
cones used at present comprise of a body relying on external features in the form of fins or vanes to form a seal between the replacement pipe and the redundant existing pipe upon insertion. At present a propriety sealant is also introduced to provide a secondary seal within the redundant pipework.
With the introduction of advanced materials and technology the said nose cones could now be manufactured so they provide the minimum resistance on insertion and be sealant free if so required. They can also be used in conjunction with a propriety sealant if a situation requires it.
Smart nose can be produced from such materials and when stimulated regain their original dimensions and form and provide a tight seal in the redundant pipe.
To achieve this criterion the smart nose cones are produced from materials that can be compressed during or after manufacture and remain in a reduced form until internal or external energy sources in the form of heat - light -sound or other forms of stimulation are applied. These materials when compressed are said to retain a memory of its original form.
One embodiment of such a material is a heat shrinkable thermoplastic polymer having in its normal state an outer diameter greater than the internal diameter of the pipe to be replaced but slightly smaller than the internal diameter when reduced in dimensions externally by the said compression. Reversion to its original state is by either internal or external energy stimulation.
It has been proved that these materials when subjected to a known energy stimulus have predictable times to ensure complete reversion to their original state and dimensions.
The present invention relates to an apparatus comprising of such an abovementioned material that incorporates an inbuilt form of stimulation - one embodiment being an electrical heating coil. This coil is connected to a timed electrical source to provide the required energy input.
The body (1) comprises a large diameter hollow tubular section with a smaller diameter tail (3) produced from the above material in its compressed/reduced form.
Built into both the body and tail is an electrical heating coil (4). Connections left protruding from the tail (5) are for connecting to the said external electrical supply.
One embodiment of such a connection is male and female socket and spigot arrangement. One example being propriety male and female spade terminals.
(2) The bore of the body (2) can be sealed off if desired, by means of a plug (6). This can be either a frangible membrane or a plug that can be either pushed or pulled out.
If desired '0' rings, Vanes, Fins or other external forms of seal can be incorporated to the nose cone. In fact sealants can be injected into the replaced pipe by using propriety methods available. All these can be used to augment and compliment the sealobtained by the smart nose cone.
Various patents describe the renewal of gas pipes both live and dead with propriety nose cones and sealant systems the method described adds a novel dimension to all these systems.
The pipe to be replaced should be isolated and any glanding mechanisms fitted.
An appropriate length of replacement pipe should now be cut.
An electrical source - cable - should be pushed down the replacement pipe and protrude from the opposite end.
The terminals protruding from the tail of the nose cone should now be connected to the cable. These can take the form of spade type terminals with matching opposites on the cable.
The cable should now be gently withdrawn up the replacement pipe and the tail of the body connected to it. This can take the form of a push fit, welding with a clamp fitted to prevent reversion, adhesives or any other desired method, The complete pipe and nose cone assembly can now be inserted into the carrier pipe and the nose cone located in the desired position.
The cable can now be connected to an electrical power supply and current allowed to pass through the inbuilt heating coil in the nose cone.
After a predetermined heating time has elapsed the current can be terminated by either a time switch or by physical means.
A suitable cooling off time should now be allowed.
After the expiration of the cooling time the electrical cable can now be disconnected from the terminals on the tail of the nose cone by pulling the said cable out of the replacement pipe and severing the connection.
The smart nose cone will have now resumed its normal dimensions and form and have formed a seal in the redundant pipe.
(3)

Claims (1)

  1. Claims (1) A new form of nose cone with an in built memory.
    (2) A nose cone as claimed in (1) wherein means are provided to stimulate the apparatus by means of heat to resume its original dimensions.
    (3) A nose cone as claimed in (1) wherein the external stimulation source is electrical.
    (4) A nose cone as claimed in (1) (2) and (3) wherein insertion is simplified and made easier due to its reduced size.
    (5) A nose cone as claimed in (1) wherein the said nose cone can be provide with '0' ring seals on the larger diameter portion of the body to provide a further seal.
    (6) A nose cone as claimed in (1) wherein the said nose cone can be provided with fins or vanes on the larger portion of the body to provide a further seal.
    (7) A nose cone as claimed in (1) wherein the nose cone can be provided with the means to inject a propriety sealant from itself (8) A nose cone as claimed in (1) wherein a propriety sealant can be injected from the point of insertion towards the said nose cone.
    (9) A nose cone as claimed in (1) wherein the external stimulation source can be other than electrical.
    (4)
GB9725942A 1997-12-09 1997-12-09 Nose cone for use in pipe lining Withdrawn GB2332257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9725942A GB2332257A (en) 1997-12-09 1997-12-09 Nose cone for use in pipe lining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9725942A GB2332257A (en) 1997-12-09 1997-12-09 Nose cone for use in pipe lining

Publications (2)

Publication Number Publication Date
GB9725942D0 GB9725942D0 (en) 1998-02-04
GB2332257A true GB2332257A (en) 1999-06-16

Family

ID=10823285

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9725942A Withdrawn GB2332257A (en) 1997-12-09 1997-12-09 Nose cone for use in pipe lining

Country Status (1)

Country Link
GB (1) GB2332257A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2076106A (en) * 1980-05-19 1981-11-25 Raychem Corp Plug for sealing a pipeline
GB2101261A (en) * 1981-07-10 1983-01-12 Umac Inc Plugging and cutting a gas line without excavation
WO1985000870A1 (en) * 1983-08-03 1985-02-28 Owens-Corning Fiberglas Corporation Method of depositing a membrane within a conduit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2076106A (en) * 1980-05-19 1981-11-25 Raychem Corp Plug for sealing a pipeline
GB2101261A (en) * 1981-07-10 1983-01-12 Umac Inc Plugging and cutting a gas line without excavation
WO1985000870A1 (en) * 1983-08-03 1985-02-28 Owens-Corning Fiberglas Corporation Method of depositing a membrane within a conduit

Also Published As

Publication number Publication date
GB9725942D0 (en) 1998-02-04

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)