WO2016062915A1 - Procédé pour serrer un raccord de canalisation haute pression pour obtenir un serrage correct et dispositif permettant de mettre en œuvre le procédé - Google Patents

Procédé pour serrer un raccord de canalisation haute pression pour obtenir un serrage correct et dispositif permettant de mettre en œuvre le procédé Download PDF

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Publication number
WO2016062915A1
WO2016062915A1 PCT/FI2014/050803 FI2014050803W WO2016062915A1 WO 2016062915 A1 WO2016062915 A1 WO 2016062915A1 FI 2014050803 W FI2014050803 W FI 2014050803W WO 2016062915 A1 WO2016062915 A1 WO 2016062915A1
Authority
WO
WIPO (PCT)
Prior art keywords
tightening
connector
threshold value
nut
connector body
Prior art date
Application number
PCT/FI2014/050803
Other languages
English (en)
Inventor
Jukka Jokinen
Original Assignee
Jukka Jokinen
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 Jukka Jokinen filed Critical Jukka Jokinen
Priority to PCT/FI2014/050803 priority Critical patent/WO2016062915A1/fr
Publication of WO2016062915A1 publication Critical patent/WO2016062915A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type
    • B25B21/005—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type driven by a radially acting hydraulic or pneumatic piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/0085—Counterholding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/145—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers
    • B25B23/1456—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers having electrical components

Definitions

  • the object of the invention is a method for tightening a high-pressure pipe connection to a correct tightness, the high-pressure pipe connection including a connector body, a fastening means arranged on the pipe to be connected, and a connector nut, which nut is mounted behind the fastening means and can be threaded to the connector body in such a way that the fastening means, together with the pipe to be connected, will move towards the connector body, settling by its sealing face into sealing contact with the counter-sealing face of the connector body on the correct tightening level of the nut.
  • a further object of the invention is a device for implementing the method.
  • the greatest challenge in successful hydraulics installation is to be able to install the pipelines in such a way that there are no leakages. Insufficient knowledge, skills or equipment, or a lack of appropriate installation equipment, may cause leakages in systems and thus even their breakdown. The reason why this happens is often the incorrect implementation of a cutting ring connection complying, for example, with the standard DIN 2353.
  • the components of a DIN 2353 connection are a tube, a cutting ring, a nut and a connector body.
  • Tightening by current methods does not provide reliable documentation of the torque used for the tightening.
  • connections are used various pipe and connector materials, often intermixed, small connections are over-tightened, large ones are tightened insufficiently. This results in delayed or interrupted processes, maintenance shutdowns, shorter life cycles due to over-tightening, replacement needs.
  • tightening requires a highly skilled mechanic.
  • the aim of the present invention is to provide a solution by means of which the problems of the prior art are avoided and a reliable and documented connection is accomplished.
  • the user of the final tightening device according to the invention does not have to be highly trained.
  • the method according to the invention is characterised in that in the method is used a device which tightens the nut to a specific threshold value of the torque and once the threshold value has been reached, the device continues, either automatically or following a separate oommand by the user, the tightening by a predetermined degree value to the desired final tightness of the nut.
  • the device according to the invention is in turn characterised in that the device comprises a tightening head with a sleeve part fitted to grip the connector nut in a form-locked manner, a torsion means for turning the sleeve part up to a specific threshold value of the torque and after that by a specific degree value to the correct final tightening value of the connector nut, the device comprising means for verifying the threshold value of the torque having been reached, and means for carrying out the final tight- ening by a determined degree value.
  • FIG. 1 shows a diagrammatic isometric exemplary view of an embodiment of a device usable in the method according to the invention
  • Figure 2 shows the device of Figure 1 , as seen from another direction, with the protective part of the tightening head removed
  • Figure 3 shows the device of Figure 1 as seen from yet another direction, with the protective part of the tightening head removed, and
  • Figures 4-5 show different connector types to which the invention can be applied.
  • Figures 4 to 5 show diagrammatic views in principle of such known connection types.
  • Figure 4 shows a connector type according to standard DI 2353, comprising a connector body 14, a connector nut 15 and a cutting ring seal 16 on the pipe 20 to be connected.
  • the connector nut 15 is behind the cutting ring seal 16, as seen from the connected end of the pipe 20.
  • the cutting ring seal forms a 24° angle with respect to the longitudinal direction of the pipe 20.
  • Figure 5 shows a cone connection structure comprising a connector body 14, a connector nut 15, a conical collar part 18 at a 37° angle formed at the end of the pipe 20 to be connected, and a support part 17 which presses the collar part tightly against the connector body.
  • FIGs 1 to 3 show diagrammatic views in principle of an embodiment of a device applicable for carrying out the method according to the invention.
  • the device 1 comprises a body part 3 and a tightening head 2.
  • the body part 3 comprises a display unit 5 and a control panel buttons 6 as well as a battery 4 acting as a power supply.
  • the tightening head 2 is provided with a protective casing 7 which is omitted from Figures 2 and 3 to illustrate the details of the tightening head.
  • the tightening head 2 comprises an auxiliary body 19 and, connected to it, a locking means 8 arranged at a lateral distance, by means of which the device can be locked to the connector body 14.
  • a sleeve part 9 extending through the auxiliary body, corresponding to the connector nut 15, the sleeve part preferably being replaceable for the device to be used in connection with pipe connections of different sizes.
  • a longitudinal slot 21 by means of which the sleeve part can be passed onto the connector nut 15 and pipe 20.
  • a torsion means 10 which is operated by the power transmission means 12.
  • the torsion means 10 has helical gearing, which turns the sleeve part 9 with counter- gearing, one or more tooth gaps at a time, and when turning back, the torsion means rises upwards and returns to the starting point.
  • the torsion means 10 acts as a ratchet, whereby the sleeve part 9 is only able to rotate in one direction.
  • the torque is generated by the power transmission means 12 which are reciprocated. With a small reciprocating movement is achieved even turning of the nut, whereby there is mostly only kinetic friction in the threading of the nut.
  • the power transmission means may be mechanical, hydraulic, belt-driven or other power transmission means known as such, the power supply of which is a battery-operated electric motor or other suitable power supply, such as an electrically operated hydraulic pump.
  • a slide ring 11 is placed over the sleeve 9, the slide ring acting as a bearing means between the torsion means 10 and the spring 13 pressing it against the sleeve part 9.
  • the device preferably includes the means required for wireless data transfer and/ or a separate memory card and/ or a fixed memory.
  • an electrically correct connector size is first selected and the sleeve part is placed over the connector nut 15 and the device is then fixed to the connector body 14 with the accompanying locking key 8.
  • This locking is necessary in order that the torque is not exerted on the pipeline, but that the torque is used for the work it is intended for, that is, for the final tightening of the connector, that is, a cutting ring connector, a flange connector or something in between, for example a cone connector.
  • From the device's intelligence-controlled connector menu is selected, for example, a 22 mm connector complying with DIN 2353 from the file stored in the apparatus' memory.
  • the apparatus is given a starting command with a button and the apparatus then rotates the connector nut until it reaches a specific threshold value which may be, for example, approximately 25 Nm, which is followed by final tightening to a value of, for example, approximately 150 Nm.
  • the threshold value torque is experimental and statistical following testing.
  • the user must accept the starting of the final tightening with a button, or alternatively, the device may continue automatically to the final tightening operation by a timer connection.
  • the apparatus rotates the connector nut by the set turn degree, for example, by 90 degrees. This can be monitored, for example, by means of a degree sensor which indicates the reaching of the desired degree and at the same time gives the control unit of the devioe a signal for finishing the tightening operation.
  • a ready light is lit on the display and the apparatus loosens the attachment either automati- cally or manually in such a way that it can be lifted off.
  • the connection is thus finally tightened correctly and just as the connector manufacturer had intended.
  • the reaching of the degree can also be monitored, for example, by calculating how many tooth gaps have been turned after reaching the threshold value, when it is known how many degrees one tooth gap equals.
  • an additional function with paint or a puncher, which indicates that the connection has already been tightened and thus preliminarily inspected before pressure testing.
  • Recording is preferably carried out through a wlan or other port in the apparatus on a computer with a monitoring program on all connectors of the object installed.
  • This function guarantees the safety of the pipelines at the entire installation site since all connections are provided with markings of their appropriate and designed tightening.
  • Of every previously unplanned site can also be taken out and recorded an output.
  • the recording can also be done on a memory card connected to the apparatus.
  • In the apparatus can also be entered advance information on all connections at the installation site, for example 12 x 22L connections and 20 x 12S connections.
  • the apparatus then has the set values ready for operation and thus communication can be interactive with the monitoring or design program.
  • the device according to the invention can be implemented the measurement of the desired threshold value torque, and once this has been reached, the operation can be continued based on a degree value, that is, as a sum of two different measuring systems in such a way that the maximum torque is, however, not exceeded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

L'invention concerne un procédé pour serrer un raccord de canalisation haute pression afin d'obtenir un serrage correct. Le raccord de canalisation haute pression comprend un corps de connecteur (14), un moyen de fixation (16 ; 18) disposé sur la canalisation (20) à raccorder, ainsi qu'un écrou de raccordement (15). L'écrou de raccordement est monté sur la canalisation à raccorder, derrière le moyen de fixation (16 ; 18) et peut être vissé sur le corps de connecteur (14) de telle sorte que le moyen de fixation (16 ; 18), conjointement avec la canalisation (20) à raccorder, se déplace vers le corps de connecteur (14), reposant par sa face d'étanchéité en contact étanche avec la contre-face d'étanchéité du corps de connecteur avec le niveau de serrage correct de l'écrou de raccordement. Dans le procédé, on utilise un dispositif (1) qui serre l'écrou de raccordement (15) à une valeur seuil spécifique de couple et, une fois que la valeur seuil a été atteinte, le dispositif continue, soit automatiquement, soit à la suite d'une commande individuelle par l'utilisateur, le serrage selon un degré prédéfini pour obtenir le serrage final souhaité de l'écrou de raccordement (15). L'invention concerne également un dispositif pour la mise en œuvre du procédé.
PCT/FI2014/050803 2014-10-23 2014-10-23 Procédé pour serrer un raccord de canalisation haute pression pour obtenir un serrage correct et dispositif permettant de mettre en œuvre le procédé WO2016062915A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2014/050803 WO2016062915A1 (fr) 2014-10-23 2014-10-23 Procédé pour serrer un raccord de canalisation haute pression pour obtenir un serrage correct et dispositif permettant de mettre en œuvre le procédé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2014/050803 WO2016062915A1 (fr) 2014-10-23 2014-10-23 Procédé pour serrer un raccord de canalisation haute pression pour obtenir un serrage correct et dispositif permettant de mettre en œuvre le procédé

Publications (1)

Publication Number Publication Date
WO2016062915A1 true WO2016062915A1 (fr) 2016-04-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2014/050803 WO2016062915A1 (fr) 2014-10-23 2014-10-23 Procédé pour serrer un raccord de canalisation haute pression pour obtenir un serrage correct et dispositif permettant de mettre en œuvre le procédé

Country Status (1)

Country Link
WO (1) WO2016062915A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2575541A (en) * 2016-12-02 2020-01-15 Snap On Tools Corp Holding tool
EP3627125A1 (fr) 2018-09-19 2020-03-25 Georg Fischer Rohrleitungssysteme AG Procédé de montage et dispositif pour composants de tuyauterie

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0636458A1 (fr) * 1993-06-04 1995-02-01 Ohmi, Tadahiro Dispositif de serrage
WO2004035267A1 (fr) * 2002-10-16 2004-04-29 Snap-On Incorporated Cle a angle de couple a cliquet et procede associe
EP2248632A1 (fr) * 2009-04-16 2010-11-10 Maeda Metal Industries, Ltd. Système radiotélégraphique de transmission et de réception de données

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0636458A1 (fr) * 1993-06-04 1995-02-01 Ohmi, Tadahiro Dispositif de serrage
WO2004035267A1 (fr) * 2002-10-16 2004-04-29 Snap-On Incorporated Cle a angle de couple a cliquet et procede associe
EP2248632A1 (fr) * 2009-04-16 2010-11-10 Maeda Metal Industries, Ltd. Système radiotélégraphique de transmission et de réception de données

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2575541A (en) * 2016-12-02 2020-01-15 Snap On Tools Corp Holding tool
GB2575541B (en) * 2016-12-02 2020-07-08 Snap On Tools Corp Holding tool
US11034003B2 (en) 2016-12-02 2021-06-15 Snap-On Incorporated Holding tool
EP3627125A1 (fr) 2018-09-19 2020-03-25 Georg Fischer Rohrleitungssysteme AG Procédé de montage et dispositif pour composants de tuyauterie
US11400568B2 (en) 2018-09-19 2022-08-02 Georg Fischer Rohrleitungssysteme Ag Installation method and device for pipeline components

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