WO1998011373A2 - Organe de coupe - Google Patents

Organe de coupe Download PDF

Info

Publication number
WO1998011373A2
WO1998011373A2 PCT/GB1997/002432 GB9702432W WO9811373A2 WO 1998011373 A2 WO1998011373 A2 WO 1998011373A2 GB 9702432 W GB9702432 W GB 9702432W WO 9811373 A2 WO9811373 A2 WO 9811373A2
Authority
WO
WIPO (PCT)
Prior art keywords
length
cutter
tube
rod
pipe
Prior art date
Application number
PCT/GB1997/002432
Other languages
English (en)
Other versions
WO1998011373A3 (fr
Inventor
Malcolm Harold Hanson
David Trevor Atkin
Eric Bridgstock
Original Assignee
Fusion Group Plc
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 Fusion Group Plc filed Critical Fusion Group Plc
Priority to AU41297/97A priority Critical patent/AU4129797A/en
Priority to GB9904753A priority patent/GB2336189A/en
Publication of WO1998011373A2 publication Critical patent/WO1998011373A2/fr
Publication of WO1998011373A3 publication Critical patent/WO1998011373A3/fr

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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/26—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics for branching pipes; for joining pipes to walls; Adaptors therefor
    • F16L47/34—Tapping pipes, i.e. making connections through walls of pipes while carrying fluids; Fittings therefor
    • F16L47/345—Tapping pipes, i.e. making connections through walls of pipes while carrying fluids; Fittings therefor making use of attaching means embracing the pipe
    • 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
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/04—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor
    • F16L41/06—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor making use of attaching means embracing the pipe

Definitions

  • This invention relates to cutters, and is particularly concerned with cutters for cutting a connecting hole in a plastics pipe.
  • an electro-fusible saddle has a threaded stem extending from the saddle from
  • the rod or tube is fitted with a means to drive the cutter down to cut the hole
  • the rod or tube must be pulled clear of the cutter, allowing the escape of fluid from within the stem until
  • the object of the present invention is to provide a cutter that allows the substantially leakproof cutting of a hole in a live mains or branch plastics pipeline.
  • a cutter comprises a cylindrical blade, a threaded body
  • the second length serving as a sealing member and the junction between the said first and second lengths serving as a visual
  • the blade is a metal cylinder with a sharpened cutting rim, and the body portion
  • first length of rod or tube are of an appropriate plastics material moulded directly on
  • the said second length of rod or tube may be formed integral with the said
  • length of rod or tube may be formed separately from the said first length and detachably attached
  • first and second lengths of rod or tube When the said first and second lengths of rod or tube are integral, they may combine to form a drive means to allow the rotation of the threaded body.
  • the threaded body when the said first length is a tube the threaded body may be formed with an internal drive socket to be engaged by
  • the said second length is a tube
  • a separate drive tool can be inserted along its length to engage the socket.
  • portion can be located in the threaded stem with the cutter facing inwardly, and the rod or tube
  • the saddle can then be located and secured to a pipe in the known manner, and the threaded
  • the threaded body can then be rotated oppositely to bring it and the
  • a sealing cap fitted to the stem for added security against leakage of fluid from within the stem.
  • the means of attachment of it to the said first length may be by the provision of integral spring loaded fingers on the inner end of the said second
  • the drive head may extend from an innermost section of rod of reduced diameter to allow it
  • Figure 1 is a sectional side elevation of a cutter in accordance with the invention.
  • Figure 2 is a sectional side elevation of part of a pipe and an attached saddle showing the
  • FIG. 3 corresponds to Figure 2 but shows the cutter penetrating the pipe
  • Figure 4 corresponds to Figure 2 but shows the cutter retracted to align a weakened zone on
  • FIG. 5 corresponds to Figure 2 but shows the surplus length of rod or tube removed and
  • FIG. 6 corresponds to Figure 1 but shows an alternative construction of cutter in
  • Figure 7 corresponds to Figure 1 but shows a further alternative construction of cutter in
  • FIG. 1 is shown a cutter 1 comprising a cylindrical metal cutter blade 2 to which is
  • moulded a threaded cutter body 3 having an integral first tube length 4 from which extends an integral second tube length 4A, the first and second tube lengths being defined by a strategically positioned weakened zone in the form of a sharp recess 5, at which point the second tube length can readily be snapped from the first tube length.
  • the saddle 7 can, as is shown in Figure 2 be secured to a pipe 8, the tube extending out of the stem past a sealing ring 9 in the upper part of the stem.
  • the body 3 By applying an appropriate drive tool to the tube, the body 3 can be rotated to urge the cutter
  • body 3 is oppositely rotated by the drive means on the tube to retract the cutter 2 with a slug 10 of pipe material retained within the cutter, and connect a cut hole 11 in the pipe wall
  • a mains or branch pipe can be filled and a saddle
  • blade 2 is again moulded with a threaded cutter body 3 having an integral first tube length 4, and
  • the innermost end has a section 17 of reduced outside diameter from

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
  • Branch Pipes, Bends, And The Like (AREA)

Abstract

Cette invention se rapporte à un organe de coupe servant à découper des trous de raccordement dans des tuyaux en plastique. Généralement, on effectue le raccordement de tuyaux en plastique existants à un réseau de distribution au moyen d'une sellette électro-fusible scellé audit tuyau et en descendant l'organe de coupe le long de la tige de la sellette de façon à découper un trou dans ledit tuyau et à raccorder ensuite le tuyau à un bout mâle ou à une ramification de la sellette de raccordement au réseau de distribution. La découpe du trou dans le tuyau entraîne inévitablement des fuites qui peuvent être dangereuses lorsque le tuyau transporte du gaz. Il existe des structures d'organe de coupe qui règlent le problème des fuites au moment où le tuyau est découpé mais qui ne règlent pas celui des fuites se produisant entre l'instant où l'on retire ledit organe et celui où l'on applique un bouchon à la tige. Cette invention a pour but de résoudre ce problème et pour ce faire, l'organe de coupe, objet de l'invention, possède une structure comprenant une lame cylindrique et un corps fileté attaché à la lame, ledit corps comportant une première longueur intégrale de tube, du côté opposé à la lame cylindrique, et une seconde longueur de tube faisant saillie par rapport à ladite première longueur à laquelle elle est attachée de manière amovible, de telle sorte que le raccordement entre lesdites première et seconde longueurs sert d'indicateur visuel. Ainsi, une fois que le trou a été découpé dans le tuyau, ladite seconde longueur reste en contact avec une bague d'étanchéité disposée dans la tige lors du retrait de l'organe de coupe jusqu'à ce que l'indicateur visuel indique que l'organe de coupe a été retiré avec succès. La seconde longueur exposée est alors retirée sans recours à un outil supplémentaire, le joint d'étanchéité étant maintenu contre la première longueur de tube et la fixation du bouchon assurant une protection supplémentaire contre les fuites.
PCT/GB1997/002432 1996-09-11 1997-09-10 Organe de coupe WO1998011373A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU41297/97A AU4129797A (en) 1996-09-11 1997-09-10 Cutters
GB9904753A GB2336189A (en) 1996-09-11 1997-09-10 Cutters

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9618980.8 1996-09-11
GBGB9618980.8A GB9618980D0 (en) 1996-09-11 1996-09-11 Cutters

Publications (2)

Publication Number Publication Date
WO1998011373A2 true WO1998011373A2 (fr) 1998-03-19
WO1998011373A3 WO1998011373A3 (fr) 2002-11-07

Family

ID=10799776

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/002432 WO1998011373A2 (fr) 1996-09-11 1997-09-10 Organe de coupe

Country Status (3)

Country Link
AU (1) AU4129797A (fr)
GB (1) GB9618980D0 (fr)
WO (1) WO1998011373A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2407855A (en) * 2003-11-04 2005-05-11 Julian Jowitt A branch connector for tapping into live pipes
WO2005085699A1 (fr) * 2004-03-02 2005-09-15 Degens, Dianne, Jean Fixation de conduit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB837399A (en) * 1957-07-31 1960-06-15 Wavin Bv Improvements in or relating to connections to pipe lines
US3176708A (en) * 1962-12-06 1965-04-06 Du Pont Tapping and valve assembly for plastic pipe
GB1220973A (en) * 1968-10-24 1971-01-27 Edward Barber And Company Ltd Improvements in and relating to ferrules for fitting a branch to a fluid-carrying pipe
US4076038A (en) * 1976-01-05 1978-02-28 Phillips Petroleum Company Tapping tee cutter having relieved sidewall

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB837399A (en) * 1957-07-31 1960-06-15 Wavin Bv Improvements in or relating to connections to pipe lines
US3176708A (en) * 1962-12-06 1965-04-06 Du Pont Tapping and valve assembly for plastic pipe
GB1220973A (en) * 1968-10-24 1971-01-27 Edward Barber And Company Ltd Improvements in and relating to ferrules for fitting a branch to a fluid-carrying pipe
US4076038A (en) * 1976-01-05 1978-02-28 Phillips Petroleum Company Tapping tee cutter having relieved sidewall

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2407855A (en) * 2003-11-04 2005-05-11 Julian Jowitt A branch connector for tapping into live pipes
WO2005085699A1 (fr) * 2004-03-02 2005-09-15 Degens, Dianne, Jean Fixation de conduit

Also Published As

Publication number Publication date
WO1998011373A3 (fr) 2002-11-07
GB9618980D0 (en) 1996-10-23
AU4129797A (en) 1998-04-02

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