GB2443705A - Flexible electrofusion branching tee - Google Patents

Flexible electrofusion branching tee Download PDF

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Publication number
GB2443705A
GB2443705A GB0624607A GB0624607A GB2443705A GB 2443705 A GB2443705 A GB 2443705A GB 0624607 A GB0624607 A GB 0624607A GB 0624607 A GB0624607 A GB 0624607A GB 2443705 A GB2443705 A GB 2443705A
Authority
GB
United Kingdom
Prior art keywords
electrofusion
pipe
flexible
carrier pipe
branching tee
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Withdrawn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
GB0624607A
Other versions
GB0624607D0 (en
Inventor
Eric Bridgstock
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
Publication of GB0624607D0 publication Critical patent/GB0624607D0/en
Publication of GB2443705A publication Critical patent/GB2443705A/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Withdrawn legal-status Critical Current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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/02—Welded joints; Adhesive joints
    • F16L47/03—Welded joints with an electrical resistance incorporated in the joint
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B29C65/7805—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features
    • B29C65/7814—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features in the form of inter-cooperating positioning features, e.g. tenons and mortises
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B29C65/7844—Holding or clamping means for handling purposes cooperating with specially formed features of at least one of the parts to be joined, e.g. cooperating with holes or ribs of at least one of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/828—Other pressure application arrangements
    • B29C66/8286—Hand placed clamps
    • 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
    • F16L47/28—Joining pipes to walls or to other pipes, the axis of the joined pipe being perpendicular to the wall or to the axis of the other pipe
    • F16L47/30—Joining pipes to walls or to other pipes, the axis of the joined pipe being perpendicular to the wall or to the axis of the other pipe using attaching means embracing the pipe

Landscapes

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

Abstract

An electrofusion branching tee, e.g. a saddle fitting, has a flexible electrically heated connecting surface 2 for application to a carrier pipe 3. It is retained on the carrier pipe to enable electrofusion by carrier pipe encircling straps 4 that are located on the fitting by integral upstands 6 and are secured by fasteners 5. Long lengths of carrier pipe are often laid from coils on drums and can be distorted after unwinding e.g. be oval in section or retain a coiled curve. A flexible saddle portion enables electofusion to a distorted pipe or a range of similar pipe sizes and so removes the need for rounding and straightening clamps or an inventory of differently sized saddle portions.

Description

DESCRIPTION
Flexible Electrofusion branching tee The jointing of polyethylene gas and water pipes by means of electrically heated fithngs (electrofusion) is widespread and successful. There are two basic categories of fittings, saddles and couplers. Couplers are designed to make a connection between the ends of pipes arid saddles are for branching from the sides of carrier pipes. In both of the variations successful jointing depends partly on the control of the dimensions of mating parts. Specifically, the circular profile of the pipe is matched by the circular profile of the adjoining fitting.
In order to reduce costs, polyethylene pipes up to a diameter of 180mm can be supplied in coils, and dispensed into the laying trench from a suitable drum or trailer, thus reducing the number of joints required. A negative consequence of this procedure is the inevitable distortion of the pipe diameter caused by the coiling process. After uncoiling the memory' of the polyethylene material causes the pipe to retain its coiling curve and the ovality created by the process.
Prior to the connection of a fitting to the pipe it has been necessary to apply rounding and straightening clamps in order to reform the desirable circular profile and straighten the length to be joined.
Saddle fittings are designed to have a circular profile and are normally quite rigid in anticipation of matching a similar profile on the reformed pipe.
To overcome these problems the present invention proposes an electrofusion branching saddle having a flexible connecting surface 2 such that the surface is able to conform to oval and curved carrier pipes thus avoiding the need for pipe re-rounding clamps and other equipment. Application of the branching tee to the carrier pipe 3 is achieved by means of flexible straps 4, secured by fasteners 5. Tightening of the flexible fasteners causes the connecting surface 2 to make intimate contact with the carrier pipe 3, having the effect of a bandage', following the contours of the distorted pipe. Upstands 6 moulded into the outer surface of the connecting surface engage with holes in the flexible straps 4 to orientate the connecting means 5. Orientation is arranged to provide full visibility to the installer when working above the fitting in a typical installation trench (fig 2 & 5) Fig 3 illustrates the ability of the flexible connecting surface to conform to the profile of oval pipes.
Fig 4 illustrates the ability of the flexible connecting surface to confirm to curved pipes, typical of pipes dispensed from a coil.
An additional benefit of the flexible electrofusion branching tee is its ability to conform to a range of similar pipe sizes thus reducing the cost associated with conventional tees which are made specifically for one size only. Fig 6shows how the fitting can be used for several pipe sizes by the use of suitably sized flexible connecting straps. Reduction in mould tool costs, production costs and inventory costs is therefore achieved.
-L-

Claims (3)

1. An electrofusion branching tee comprising a flexible connecting surface which can conform and fuse to a variety of oval and curved carrier pipes.
2. An electrofusion branching tee according to claim 1 that is connected to the carrier pipe by means of a plurality of flexible straps secured by securing means and radially located by moulded upstands.
3. An electrofusion branching tee according to claim 1 that can be applied to a variety of similar pipe sizes by means of suitably sized flexible straps.
GB0624607A 2006-10-27 2006-12-11 Flexible electrofusion branching tee Withdrawn GB2443705A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0621672.5A GB0621672D0 (en) 2006-10-27 2006-10-27 Flexible electrofusion branching tee

Publications (2)

Publication Number Publication Date
GB0624607D0 GB0624607D0 (en) 2007-01-17
GB2443705A true GB2443705A (en) 2008-05-14

Family

ID=37546305

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB0621672.5A Ceased GB0621672D0 (en) 2006-10-27 2006-10-27 Flexible electrofusion branching tee
GB0624607A Withdrawn GB2443705A (en) 2006-10-27 2006-12-11 Flexible electrofusion branching tee

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0621672.5A Ceased GB0621672D0 (en) 2006-10-27 2006-10-27 Flexible electrofusion branching tee

Country Status (1)

Country Link
GB (2) GB0621672D0 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2526272A (en) * 2014-05-19 2015-11-25 Plasson Ltd Electrofusion saddle
CN107076346A (en) * 2014-09-26 2017-08-18 乔治费希尔韦文股份公司 Pipe clamp
GB2589601A (en) * 2019-12-04 2021-06-09 Polypipe Plc Pipe branch connector

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162917A (en) * 1984-08-08 1986-02-12 Fischer Ag Georg Weldable plastic pipe coupling
NL9500162A (en) * 1995-01-30 1996-09-02 Hak A Nederland Bv Method for attaching a broaching or smoothing fitting to a polyethylene pipeline
JPH08285167A (en) * 1995-04-07 1996-11-01 Shin Etsu Polymer Co Ltd Main pipe installing branch pipe and its manufacture
JPH10185068A (en) * 1996-12-24 1998-07-14 Sekisui Chem Co Ltd Fixing method of electric fusion coupling
EP1231045A2 (en) * 2001-02-08 2002-08-14 Mitsui Chemicals, Inc. Electrofusion joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2162917A (en) * 1984-08-08 1986-02-12 Fischer Ag Georg Weldable plastic pipe coupling
NL9500162A (en) * 1995-01-30 1996-09-02 Hak A Nederland Bv Method for attaching a broaching or smoothing fitting to a polyethylene pipeline
JPH08285167A (en) * 1995-04-07 1996-11-01 Shin Etsu Polymer Co Ltd Main pipe installing branch pipe and its manufacture
JPH10185068A (en) * 1996-12-24 1998-07-14 Sekisui Chem Co Ltd Fixing method of electric fusion coupling
EP1231045A2 (en) * 2001-02-08 2002-08-14 Mitsui Chemicals, Inc. Electrofusion joint

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2526272A (en) * 2014-05-19 2015-11-25 Plasson Ltd Electrofusion saddle
GB2526272B (en) * 2014-05-19 2016-08-24 Plasson Ltd Electrofusion saddle
CN107076346A (en) * 2014-09-26 2017-08-18 乔治费希尔韦文股份公司 Pipe clamp
CN107076346B (en) * 2014-09-26 2019-03-15 乔治费希尔韦文股份公司 Pipe clamp
GB2589601A (en) * 2019-12-04 2021-06-09 Polypipe Plc Pipe branch connector

Also Published As

Publication number Publication date
GB0621672D0 (en) 2006-12-06
GB0624607D0 (en) 2007-01-17

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