WO1995011124A1 - Soudure bout a bout de tuyaux - Google Patents

Soudure bout a bout de tuyaux Download PDF

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Publication number
WO1995011124A1
WO1995011124A1 PCT/GB1994/002267 GB9402267W WO9511124A1 WO 1995011124 A1 WO1995011124 A1 WO 1995011124A1 GB 9402267 W GB9402267 W GB 9402267W WO 9511124 A1 WO9511124 A1 WO 9511124A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe ends
butt welding
ambient temperature
sensed
temperature
Prior art date
Application number
PCT/GB1994/002267
Other languages
English (en)
Inventor
Eric Bridgstock
Roy Cartwright
David Michael Anthony Kenworthy
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 AU79418/94A priority Critical patent/AU7941894A/en
Priority to JP51150295A priority patent/JPH09503713A/ja
Publication of WO1995011124A1 publication Critical patent/WO1995011124A1/fr

Links

Classifications

    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • 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
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • 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
    • B29C35/16—Cooling
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/944—Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time

Definitions

  • This invention relates to butt welding of pipes.
  • plastics pipes in a pipeline must be in sealed engaging relationship, either for the safe transport of fluids through the pipeline or to prevent the ingress of fluid into the pipeline at a joint between successive lengths.
  • Butt welding equipment must function correctly in extremes of ambient temperature conditions, and hitherto, the soak period has tended to be set to ensure that there is sufficient heat in the pipe ends under the coldest predictable conditions, with an allowance to guard against any delay from the point that the pipe ends are retracted from the heater plate to the point that the pipe ends are brought into contact for welding.
  • the pipe ends must be left for a longer period than is necessary to allow them to cool down following the welding stage.
  • the cooling period following welding is left to the discretion of the operative, with the frequent result of the operative deciding on a cooling period that is longer than is necessary.
  • the relatively long period of time that the equipment must be left holding the pipe ends in place after welding to allow the pipe ends to cool to a degree when it will be safe to remove the equipment from the pipe ends is an important parameter.
  • the length of time that the equipment must be left iri place after welding is a major factor in governing the number of butt welds that can be effected in unit time, and which of itself is a major factor in the total costs of laying a complete pipeline.
  • a butt welding machine comprises a control means to provide a self-determined cooling period for the pipe ends at the weld stage, said control means employing parameters sensed and/or measured during the operation of the machine by sensing and/or measuring means on the machine.
  • a butt welding machine such as, for example, of the type fully described in British Patent No. 2191976 is, in accordance with the invention, provided with an ambient temperature sensing means, a timing device, and a linear transducer.
  • the ambient temperature is sensed and the sensed temperature employed to set the duration of the timer, the timer being activated at the point that the linear transducer senses that the pipe ends have completed a required movement to cause a required degree of penetration of the pipe ends to ensure the formation of an effective weld.
  • the duration of the cooling period is thereby set as a direct function of ambient temperature and kept to a minimum for any particular ambient temperature.
  • an appropriate signal is provided to advise the operative that the pipe ends can be safely removed from the clamps.
  • a separate possibility is the provision of a temperature sensing means to sense the temperature of the pipes at the position of the weld, the sensed temperature being employed to terminate the cooling stage when the temperature has reduced to a predetermined level.
  • a butt welding machine coraprises a control means to provide a self-determining degree of heating of the pipe ends against a heater plate, said control means employing parameters sensed and/or measured during the operation of the machine by sensing and/or measuring means on the machine.
  • an ambient temperature sensing means a timing device and a linear transducer may be provided on the machine, such as is described in British Patent No. 2191976.
  • the ambient temperature sensing means is caused to sense ambient temperature, the sensed temperature setting the duration of the timing device and hence limiting the duration of the heating phase to no more than is required by ambient temperature.
  • the sensed ambient temperature can be employed to set the temperature of the heater plate with the timer pre-set to a fixed duration.
  • the duration of the heating phase can be employed to dictate the duration of the cooling period.
  • the cooling period may be further curtailed as has been discussed above by the presence of a timing device set as a function of sensed ambient temperature.
  • a means of measuring a formed bead and a timing device are provided on the machine, and whereby the time taken to form a bead of required size can be measured, and the measured time employed to set the duration of the heating phase of the pipe ends against the heater plate.
  • the timing device may be the same timing device that is reset for the required duration of the heating phase or it may be a second timing device provided for that purpose. The result is the same, the limiting of the degree of heat input into the pipe ends at the heating phase with its influence over the duration of the final cooling stage following the formation of a weld.
  • the measurement of the time taken to form a bead of a required size can be by way of a sensor to sense that a required bead height has been reached, or can be by the measurement of the time taken for the movement of the pipe ends/clamps by a predetermined degree sensed by a linear transducer, to form a bead of a predetermined size.
  • the duration of the dwell period that can be measured by the timing device primarily provided for controlling the cooling and/or the heating phase, or can be a separate timing device for the purpose.
  • the measured duration of the dwell period is employed to shorten commensurately the cooling period.
  • microprocessor means may be provided, provided with predetermined parameters such as required degrees of linear movement of the pipe ends/clamps at the heating phase and/or at the weld stage and to which all sensed or measured parameters such as ambient temperature and measured time can be passed, the microprocessor being programmed to calculate a required duration of the heating phase and required duration of the cooling period.
  • Example A i Linear displacement control to form a bead of predetermined size. ii Record displacement time. iii Employ recorded time to set duration of heating phase. iv Determine dwell time. v Control final joint by linear displacement, vi Consider time taken to form joint, vii Employ cooling time determined by time to form a bead and duration of heating phase.
  • Example B i Sense ambient temperature ii Allow bead to form based upon a function of time related to ambient temperature.
  • iii Duration of heating phase based upon a function of time to form bead.
  • iv Record linear movement to create a bead of required size.
  • v Determine dwell time.
  • Linear movement at weld determined as a function of linear movement at bead up.
  • Cooling time determined as a function of ambient temperature and heating phase duration.
  • V Predetermined linear displacement control to form a weld.

Landscapes

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

Abstract

L'invention se rapporte à la soudure bout à bout de tuyaux et particulièrement à l'aménagement de temps de refroidissement déterminés automatiquement pendant lesquels les extrémités des tuyaux doivent rester serrées dans la machine à souder pour garantir la création d'une soudure efficace. On connaît déjà des machines qui soudent bout à bout et qui soient performantes, telle celle décrite dans le brevet britannique n° 2191976, mais même des machines aussi sophistiquées que celle-là laissent grandement à la discrétion d'un opérateur le soin de décider de la durée pendant laquelle la machine doit attendre avant de relâcher sans risque ses moyens de serrage après l'étape de soudure. Il en résulte presque inévitablement que les tuyaux sont serrés par la machine beaucoup plus longtemps qu'il n'est réellement nécessaire, et l'objet de cette invention est de raccourcir la durée des temps de refroidissement, lesquels sont déterminés automatiquement par la machine, en fonction des conditions de température ambiante. Selon l'invention, on a monté des moyens de régulation utilisant des paramètres captés et/ou mesurés afin de limiter l'étape de refroidissement à une durée ne dépassant pas celle requise, eu égard aux conditions de température ambiante et à la quantité de chaleur emmagasinée par les extrémités des tuyaux lors de l'étape de chauffage et/ou de la formation du cordon de soudure.
PCT/GB1994/002267 1993-10-19 1994-10-17 Soudure bout a bout de tuyaux WO1995011124A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU79418/94A AU7941894A (en) 1993-10-19 1994-10-17 Butt welding of pipes
JP51150295A JPH09503713A (ja) 1993-10-19 1994-10-17 パイプの突合わせ溶接

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9321675.2 1993-10-19
GB9321675A GB9321675D0 (en) 1993-10-19 1993-10-19 Butt welding of pipes

Publications (1)

Publication Number Publication Date
WO1995011124A1 true WO1995011124A1 (fr) 1995-04-27

Family

ID=10743871

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/002267 WO1995011124A1 (fr) 1993-10-19 1994-10-17 Soudure bout a bout de tuyaux

Country Status (4)

Country Link
JP (1) JPH09503713A (fr)
AU (1) AU7941894A (fr)
GB (1) GB9321675D0 (fr)
WO (1) WO1995011124A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738100C1 (de) * 1997-09-01 1998-10-08 Fischer G Rohrverbindungstech Verfahren und Vorrichtung zum Verschweißen von Kunststoffrohren
WO1998047691A1 (fr) * 1997-04-23 1998-10-29 Gaz De France (G.D.F.) Service National Perfectionnement a un procede de soudage bout a bout
EP0899083A2 (fr) * 1997-09-01 1999-03-03 Georg Fischer Rohrleitungssysteme AG Appareil et procédé pour le soudage de pièces en matière synthétique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1482185A (en) * 1975-05-22 1977-08-10 British Steel Corp Determining and indicating the end of a cooling period of a hot body
US4060190A (en) * 1973-02-21 1977-11-29 Naphtachimie Process for joining tubular members of great length
GB2191976A (en) * 1986-06-25 1987-12-31 Fusion Equipment Ltd Butt-welding of pipes
US4971639A (en) * 1989-02-28 1990-11-20 Sampson Machine Company Method and apparatus for joining polymeric substrates such as vinyl frames
US5013376A (en) * 1989-10-02 1991-05-07 Mcelroy Manufacturing, Inc. Programmable computer controlled pipe fusion device
JPH04203587A (ja) * 1990-11-29 1992-07-24 Sekisui Chem Co Ltd 溶着継手
FR2691666A1 (fr) * 1992-06-01 1993-12-03 Gaz De France Procédé pour souder bout à bout deux pièces plastiques à code d'identification, au moyen d'une machine d'électrosoudage à commande automatique.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060190A (en) * 1973-02-21 1977-11-29 Naphtachimie Process for joining tubular members of great length
GB1482185A (en) * 1975-05-22 1977-08-10 British Steel Corp Determining and indicating the end of a cooling period of a hot body
GB2191976A (en) * 1986-06-25 1987-12-31 Fusion Equipment Ltd Butt-welding of pipes
US4971639A (en) * 1989-02-28 1990-11-20 Sampson Machine Company Method and apparatus for joining polymeric substrates such as vinyl frames
US5013376A (en) * 1989-10-02 1991-05-07 Mcelroy Manufacturing, Inc. Programmable computer controlled pipe fusion device
JPH04203587A (ja) * 1990-11-29 1992-07-24 Sekisui Chem Co Ltd 溶着継手
FR2691666A1 (fr) * 1992-06-01 1993-12-03 Gaz De France Procédé pour souder bout à bout deux pièces plastiques à code d'identification, au moyen d'une machine d'électrosoudage à commande automatique.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 545 (M - 1337) 16 November 1992 (1992-11-16) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998047691A1 (fr) * 1997-04-23 1998-10-29 Gaz De France (G.D.F.) Service National Perfectionnement a un procede de soudage bout a bout
FR2762540A1 (fr) * 1997-04-23 1998-10-30 Gaz De France Perfectionnement a un procede de soudage bout a bout
US6036795A (en) * 1997-04-23 2000-03-14 Gaz De France (G.D.F.) Service National Butt-welding process using an automatically controlled electro-welding machine
CN1080186C (zh) * 1997-04-23 2002-03-06 法国气体公司 一种改进的对头焊接方法
DE19738100C1 (de) * 1997-09-01 1998-10-08 Fischer G Rohrverbindungstech Verfahren und Vorrichtung zum Verschweißen von Kunststoffrohren
EP0899083A2 (fr) * 1997-09-01 1999-03-03 Georg Fischer Rohrleitungssysteme AG Appareil et procédé pour le soudage de pièces en matière synthétique
EP0899083A3 (fr) * 1997-09-01 2000-05-10 Georg Fischer Rohrleitungssysteme AG Appareil et procédé pour le soudage de pièces en matière synthétique

Also Published As

Publication number Publication date
GB9321675D0 (en) 1993-12-08
JPH09503713A (ja) 1997-04-15
AU7941894A (en) 1995-05-08

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