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WO1990004483A1 - Procede et appareil servant a realiser une soudure sous l'eau - Google Patents

Procede et appareil servant a realiser une soudure sous l'eau Download PDF

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Publication number
WO1990004483A1
WO1990004483A1 PCT/FI1988/000174 FI8800174W WO9004483A1 WO 1990004483 A1 WO1990004483 A1 WO 1990004483A1 FI 8800174 W FI8800174 W FI 8800174W WO 9004483 A1 WO9004483 A1 WO 9004483A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
base
mantle
rod
protection mantle
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.)
Ceased
Application number
PCT/FI1988/000174
Other languages
English (en)
Inventor
Ensi Kyösti Juhani NIINIVAARA
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 PCT/FI1988/000174 priority Critical patent/WO1990004483A1/fr
Publication of WO1990004483A1 publication Critical patent/WO1990004483A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/0061—Underwater arc welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
    • B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors

Definitions

  • the invention relates to arc welding and it concerns a method according to the preamble of the accompanying claim 1 and an apparatus according to the preamble of the accompanying claim 3 for making a weld seam between a body to be welded fast and a base, preferably to attach an anticorrosion anode to an underwater metal structure.
  • an underwater weld seam especially to attach a body, like a leg of an anticorrosion anode or corresponding, to an underwater base, like an underwater metal structure preferably a metal beam
  • a body like a leg of an anticorrosion anode or corresponding
  • an underwater base like an underwater metal structure preferably a metal beam
  • arc welding according to the method and apparatus of the invention it is used a, preferably rod-like, welding electrode insulated from the surrounding mass of water by a case-like protection mantle.
  • the base is connected to one pole of the current source and the welding electrode correspondingly to the other pole.
  • the apparatus itself include;
  • the main object of the invention is to make possible producing of the weld seam in a space insulated from water automatically without presence of a diver and at the same to make possible mounting of the apparatus to an arm of a diving robot.
  • THis object can be achieved by the method and the apparatus mentioned in the beginning characterizing features of which are presented in the accompanying claims.
  • the body meant to be fastened surface of which meant to be placed against the base comprises a preferably lip-like gasket ring, is placed on to the base and is attached thereto, preferably by riveting, by tightening means or by using some other suitable mechanic fastening means. Then water and/or moisture remained between the body and the base inside the gasket ring is removed by heating the body meant to fastened by welding, especially by heating that part of the body which is against the base.
  • the welding process is activated, whereby the welding electrode is moved, for making a continuous weld seam between the body and the base, inside the protection mantle by means of hydraulic power means driven by an axial force, preferably a thrust force, of hydrostatic pressure, higher than pressure inside the protection mantle, of the surrounding mass of water, which force is directed to the hydraulic power means.
  • hydraulic power means driven by an axial force, preferably a thrust force, of hydrostatic pressure, higher than pressure inside the protection mantle, of the surrounding mass of water, which force is directed to the hydraulic power means.
  • figure 1 presents a longitudinal section of an apparatus in accordance with a first preferred embodiment of the invention
  • figure 2 presents a longitudinal section of an apparatus in accordance with a second preferred embodiment of the invention
  • figure 3 illustrates a side view of the first preferred embodiment supplemented with a gasket ring according to the invention for drying the intermediate space.
  • an outer, case-like protection mantle 2 which is a part of a leg of an anode meant to be fastened, and which is meant to be placed onto a steel beam acting as a base 1, which is connected to a negative pole of an current source,
  • means for moving and guiding the welding electrode include a power cylinder 4 which is driven according to the invention by utilizing a hydrostatic pressure of the surrounding water mass, which pressure is higher than pressure inside the protection mantle.
  • a mantle of the hydraulic cylinder 4 include an outer mantle 46 of electrically unconductive material an inner mantle 47, which is made of electrically conductive material and connected the positive pole of the current source.
  • a piston of the hydraulic cylinder include; a piston member 41, which is made of electrically unconductive material and to one side of which influences the hydrostatic pressure of said surrounding water mass via a channel which can be closed and open by a sluice valve, and another piston member 42, which is made of electrically conductive material, both as extension thereof a piston rod 43, whereto is jointed in an electrically conductive way the welding rod.
  • the first and the second piston members 41 and 42 are arranged with distance apart from each other and the space therebetween is filled with fluid electrically conductive medium, as the medium it is advantageous to use mercury.
  • an electrically conductive bath extending from a current cable connected to the pole of the current source is composed of the electrically conductive medium inside the intermediate space between the first and the second piston members, of the second piston member 42 and of the piston rod 43 jointed thereto.
  • the hydraulic cylinder 4 is arranged to extend in an oblique angle through the wall 22 of the protection mantle 2 in relation to the bottom surface 21 of the protection mantle 2.
  • the size of the oblique angle is considerably dependent on properties and dimensions of the welding rod in use, it is advantageous to choose the size of the oblique angle between 5°-45°.
  • the second advantageous embodiment of the invention illustrated in figure 2 differs from the first embodiment described above in respect to the construction of the hydraulic cylinder 3, to the support solution of the welding rod 3, and to conduction bath for the electric current.
  • the hydraulic cylinder include one-mantled, outward electrically unconductive cylinder part 46, wherein moves one single piston member 40 forced by the hydraulic pressure of the surrounding water mass.
  • the piston rod 43 is mounted to the other side of the piston member, whereby the piston member 40 moves the piston rod 43 ahead towards the interior of the protection mantle.
  • the welding rod 3 is attached by a separate el _.ectrically conductive intermediate member 45 to the piston rod 43, which is electrically unconductive.
  • the hydraulic cylinder 4 is in this second embodiment like in the first embodiment arranged to extend in an oblique angle through the wall 22 of the protection mantle 2 in relation to the bottom surface 21 of the protection mantle 2.
  • the inner surfaces of the side walls 22 of the protection mantl& 2 are provided with two pairs of longitudinal, for example rail-like, slide guides 5 arranged in an oblique angle in relation to the surfaces of bottom wall 21 and the base 1. At least one pair of the slide guides is electrically conductive and connected to the positive pole of the current source, for example by a current cable.
  • the welding rod 3 is so connected by the electrically conductive and between the pairs of the slide guides along a certain movement bath moveable joint member 45 to the piston rod 43 of piston member 40 of the hydraulic cylinder 4, whereby the conduction bath for the welding current from the current cable connected to the current source to the welding rod 3 is composed of the joint member 45 moving along the slide guide acting as a guide and a current rail.
  • the bottom wall of protection mantle of the apparatus includes a channel-like recess 23 open at least to interior of the protection mantle 2. It is preferable that for each welding rod 3 to be moved inside the protection mantle 2 a recess exists therefore.
  • the bottom or the base of each recess which accordingly is directed towards the base 1, is closed by a material strip 24, which is thinner than the thickness of the bottom wall, and which is preferably a material remnant strip of the bottom wall left when recess 23 was made.
  • Said material strip maintains inside the protection mantle 2 a pressure which is lower than the hydrostatic pressure of the surrounding water mass, whereby function of the hydraulic cylinder is possible without need of additional pressure sources, and the material strip fuses open due to the arc created between the end of the welding rod 3 moving in the recess 23 and the base 1.
  • the figure 3 illustrates as already mentioned above a side view of the first embodiment supplemented with a gasket ring 25 and a drying solution in accordance with the invention.
  • the anode leg is first attached by rivet joints 26 to an underwater metal beam 1, whereby the anode will more certainly stay still and drying of the intermediate space and making of the continuous weld seam is assured.
  • the rivet joint for example for so called pop-rivet joint, it is preferred that both the beam and the anode leg are provided in advance with suitable bores, whereby the rivet joint can be carried out rapidly by means of a rivet tool.
  • rivet joints can well use also other solutions for example a band to be tightened by a block (not presented in the figures) for the duration of work.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

La présente invention décrit une opération de soudage à l'arc et se rapporte à un procédé et à un appareil permettant de réaliser une soudure, de préférence en vue de fixer une anode anticorrosion à une structure métallique sous-marine (1). Selon le procédé et l'appareil de la présente invention, on utilise une électrode de soudage en forme de tige (3), qui est isolée de la masse d'eau environnante par une gaine de protection du type chemise (2). Pour créer un arc, on raccorde la structure (1) à un pôle d'une source de courant et l'électrode (3) à l'autre pôle. Selon l'idée de base de la présente invention, l'anode est pourvue d'un joint d'étanchéité torique (25) qui est placé d'abord sur la structure (1), puis est assujetti fermement (26) à elle. On élimine ensuite l'eau et/ou l'humidité restant entre la structure et le joint d'étanchéité torique par chauffement. Après séchage de l'espace intermédiaire, on peut commencer l'opération de soudage, qui consiste à placer l'électrode de soudage (3) à l'intérieur de la gaine de protection (2) au moyen d'un vérin hydraulique (4), lequel est mû par la pression hydrostatique de la masse d'eau entourant la gaine de protection.
PCT/FI1988/000174 1988-10-26 1988-10-26 Procede et appareil servant a realiser une soudure sous l'eau Ceased WO1990004483A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI1988/000174 WO1990004483A1 (fr) 1988-10-26 1988-10-26 Procede et appareil servant a realiser une soudure sous l'eau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI1988/000174 WO1990004483A1 (fr) 1988-10-26 1988-10-26 Procede et appareil servant a realiser une soudure sous l'eau

Publications (1)

Publication Number Publication Date
WO1990004483A1 true WO1990004483A1 (fr) 1990-05-03

Family

ID=8556451

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1988/000174 Ceased WO1990004483A1 (fr) 1988-10-26 1988-10-26 Procede et appareil servant a realiser une soudure sous l'eau

Country Status (1)

Country Link
WO (1) WO1990004483A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2367519A (en) * 2000-10-03 2002-04-10 Stanislav Brodski Contact - impulse welding
GB2367520A (en) * 2000-10-03 2002-04-10 Stanislav Brodski Contact - impulse welding device
CN113210923A (zh) * 2021-04-02 2021-08-06 中石化石油机械股份有限公司沙市钢管分公司 海洋钢管的焊缝拉伸性能控制方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985002801A1 (fr) * 1983-12-22 1985-07-04 Subsea Welding & Engineering Limited Procede de soudage sous l'eau
WO1986001137A1 (fr) * 1984-08-14 1986-02-27 Oy Gss General Sea Safety Ltd Procede, appareil et element de realisation d'un joint de soudage sous l'eau
GB2164286A (en) * 1984-09-12 1986-03-19 Kd Marine Uk Ltd Underwater arc welding
GB2172533A (en) * 1985-03-15 1986-09-24 Wharton Ltd Williams Improvements in or relating to underwater welding apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985002801A1 (fr) * 1983-12-22 1985-07-04 Subsea Welding & Engineering Limited Procede de soudage sous l'eau
WO1986001137A1 (fr) * 1984-08-14 1986-02-27 Oy Gss General Sea Safety Ltd Procede, appareil et element de realisation d'un joint de soudage sous l'eau
GB2164286A (en) * 1984-09-12 1986-03-19 Kd Marine Uk Ltd Underwater arc welding
GB2172533A (en) * 1985-03-15 1986-09-24 Wharton Ltd Williams Improvements in or relating to underwater welding apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2367519A (en) * 2000-10-03 2002-04-10 Stanislav Brodski Contact - impulse welding
GB2367520A (en) * 2000-10-03 2002-04-10 Stanislav Brodski Contact - impulse welding device
GB2367519B (en) * 2000-10-03 2004-03-03 Stanislav Brodski Method of contact-impulse welding
GB2367520B (en) * 2000-10-03 2004-03-31 Stanislav Brodski Construction of the device for contact-impulse welding
CN113210923A (zh) * 2021-04-02 2021-08-06 中石化石油机械股份有限公司沙市钢管分公司 海洋钢管的焊缝拉伸性能控制方法

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