WO2010043850A1 - Outil de découpe mécanique - Google Patents

Outil de découpe mécanique Download PDF

Info

Publication number
WO2010043850A1
WO2010043850A1 PCT/GB2009/002432 GB2009002432W WO2010043850A1 WO 2010043850 A1 WO2010043850 A1 WO 2010043850A1 GB 2009002432 W GB2009002432 W GB 2009002432W WO 2010043850 A1 WO2010043850 A1 WO 2010043850A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
blade
tool
anvil pin
arms
Prior art date
Application number
PCT/GB2009/002432
Other languages
English (en)
Inventor
Keith Stuart Elliot
David Heys
Darren Jason Pilkington
Original Assignee
Allspeeds Limited
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 Allspeeds Limited filed Critical Allspeeds Limited
Publication of WO2010043850A1 publication Critical patent/WO2010043850A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/12—Fluid-pressure means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
    • B23D15/14—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D29/00—Hand-held metal-shearing or metal-cutting devices
    • B23D29/002—Hand-held metal-shearing or metal-cutting devices for cutting wire or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • E02D9/04—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by cutting-off under water
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/12—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground specially adapted for underwater installations

Definitions

  • the present invention relates to a powered cutting tool and in particular to a remotely operated hydraulic cutting tool primarily but not exclusively for use underwater, for example in submarine conditions by attachment of the tool to a manipulator arm of a remotely operated vehicle.
  • Underwater powered cutting tools are designed for cutting wire ropes, armoured telecommunication cables, power cables and hydraulic lines.
  • a tool comprises a bifurcate body between the arms of which is slidably mounted a hydraulically powered guillotine blade.
  • the tool is manipulated so that the cable or rope to be severed is located between the arms of the body.
  • the tool is then powered so that an anvil pin is moved across the open end of the body to trap the cable or rope therein whereupon the guillotine blade is hydraulically driven down the arms, through the cable or rope and against the anvil pin. Once the cable or rope is severed, the blade is returned and the anvil pin retracted ready for the next cutting operation.
  • the object of the present invention is to overcome or substantially mitigate the aforementioned problem.
  • a powered cutting tool comprising a bifurcate body with spaced first and second arms; an anvil pin reciprocable through the first arm between a first position wherein an item to be cut can be located in the body between the first and second arms and a second position wherein it seats in the second arm thereby to trap the item within the body; a blade slidable between the arms of the body to contact the anvil pin when the anvil pin is in its second position; and means for powering the movement of the anvil pin and the blade by means of a pressurizing fluid; characterised in that a valve is provided to control the flow of pressuring fluid for operation of the blade, actuation of the valve being trigged to allow the flow of the pressuring fluid to power the blade only when the anvil pin has seated in the opposite side of the body.
  • the use of a valve to control the flow of pressurizing fluid for operation of the blade means that adequate seating of the anvil pin in the body can be ensured prior to blade operation. This obviates the problem encountered in the prior art.
  • an actuator for the valve operates synchronously with the movement of the anvil pin.
  • the actuator comprises a plunger which reciprocates in a first bore through which pressurizing fluid can flow when the valve is open to power the blade, the plunger reciprocating between a first, retracted position wherein the valve is biased closed and a second, actuating position at the end of its stroke wherein the plunger acts to open the valve against the force of the bias.
  • the plunger and the anvil pin are connected to and reciprocated synchronously by a lever pivotally mounted on the body.
  • rotation of the lever is powered by a piston which reciprocates in a second bore formed within the body, the bore defining a first pressure chamber on one side of the piston and a second pressure chamber on the other side of the piston, first and second inlet/ outlet ports being provided into the first and second pressure chambers respectively through which pressurizing fluid can flow into or out of the first or second chamber to cause the piston to move one way or the other within the bore dependent on the chamber that is pressurized to move the lever towards or away from the body and thereby move respectively the anvil pin and the plunger from their first positions into their second positions and vice versa.
  • a side of the valve opposite the plunger is pressurized by the pressurized fluid at the same time as the first pressure chamber is pressurized whereby on opening of the valve by the actuator pressurized fluid can immediately flow to means for operating the blade.
  • Movement of the blade is preferably powered by a pressure intensifier mounted on the body and to which the flow of pressuring fluid is permitted when the valve is opened.
  • the valve comprises a spring-loaded ball valve.
  • the anvil pin reciprocates through a guide located in the first arm and seats in a seating cavity defined in the second arm.
  • a longitudinally orientated parallel grooves are provided in the arms along which the blade slides as it travels between the arms.
  • the grooves are formed in strengthening guide plates attached to the inside of the arms.
  • Fig. l is a perspective view of an embodiment of hydraulically powered cutting tool in accordance with the present invention.
  • Fig. 2 is a side elevation of the tool shown in Fig. i;
  • Fig. 3 is a plan view of the tool shown in Figs, i and 2;
  • Figs 4 and 5 are cross-sectional views along the lines IV-IV and V-V respectively in Fig. 3.
  • the embodiment of powered cutting tool 1 shown in the drawings comprises a bifurcate body 2 with first and second arms 3 and 4 between which is a substantially U-shaped aperture 5.
  • An anvil pin 6 is reciprocable through a guide 7 located in the first arm 3 between a first position, wherein an item to be cut can be located in the aperture 5 between the first and second arms 3 and 4, and a second position wherein it seats in cylindrical seating cavity 8 formed in the second arm 4. In this second position the anvil pin 6 bridges the arms 3 and 4 and thereby traps an item located between the arms 3 and 4 within the body 2.
  • the anvil pin 6 is shown in a position part way between its first and its second position so that it does not bridge the arms 3 and 4 but it in a position projecting part of the way across the aperture 5.
  • a hardened steel guillotine blade 9 is mounted within the body 2 so that it can slide between the arms 3, 4 to contact the anvil pin 6 when the pin 6 is in its second position. In this way the blade 9 can be driven down the body 2, through any trapped item and against the anvil pin 6 to sever the item.
  • the blade 9 is driven by a hydraulic ram located within a housing 10 attached to the body 2, a pressure intensifier, which is also located in the housing 10, being used to build up a high pressure feed for the ram.
  • Located at the top of the body 2 are first and second inlet/outlet ports ii and 12 through which pressurizing fluid can flow into or out of the body 2 to power movement of the anvil pin 6 and to charge the pressure intensifier which powers movement of the blade 9.
  • a valve 13 is provided within the body 2 to control the flow of fluid to the pressure intensifier, opening of the valve 13 to allow flow of the fluid only occurring when the anvil pin 6 has seated fully in the cavity 8.
  • the anvil pin 6 is moved by a lever 14 to which it is pivotably connected and which is itself pivotally connected by a link 15 to the top of the body 2 adjacent the first arm 3.
  • the lever 14 is rotated by a hydraulic piston arrangement.
  • a piston 16 is located in and can reciprocate within a bore 17 formed within the body 2.
  • a piston rod 18, which is integrally formed with the piston 16, passes out of the bore 17 through a fluid seal 19 and is connected to one side of the lever 14.
  • the bore 17 defines a first pressure chamber 20 on one side of the piston 16 and a second pressure chamber 21 on the other side of the piston 16.
  • the first and second inlet/ outlet ports 11 and 12 are respectively linked to these chambers 20 and 21 via respective connecting bores 22 and 23.
  • Plugs 24 close off the free ends of these bores at the exterior of the body 2 that were necessary to enable their machining during manufacture. It will be appreciated that by pressurizing either the first or the second pressure chamber 20 or 21 with hydraulic fluid, the piston 16 is forced to move one way or the other within the bore 17 to rotate the lever 14 towards or away from the body 2. This, in turn, moves the anvil pin 6 from its first position into its second position and vice versa.
  • the actuator 25 controls operation of the valve 13.
  • the actuator 25 comprises a plunger 26 that is located in and can reciprocate within a bore 27 formed within the body 2.
  • the plunger 26 reciprocates for most of its length within a guide 28 located in the bore 27 and passes out of the bore 27 through a fluid seal 29 where it is connected to the lever 14.
  • the bore 27 is constricted at a location near its centre but in a position closer to the second arm 4 than the first arm 3 to form a valve seat 30 for the valve 13.
  • the valve 13 comprises a ball valve member 31 which is biased closed against the seat 30 by a spring loading 32.
  • the plunger 26 is arranged so that its free end only makes contact with the valve member 31 to move it against the bias of the spring loading 32 to open the valve 13 as it nears the end of its stroke into the bore 27.
  • the location of the valve seat 30 in the bore 27 and the length of the plunger 26 are determined so that the opening of the valve 13 can only take place when the lever 14 has been rotated sufficiently to ensure that the anvil pin 6 has adequately seated in the seating cavity 8 in the second arm 4.
  • the inlet/outlet port 11 is also linked to the bore 27 on the side of the valve 13 opposite the plunger 26 by connecting bores (not shown).
  • the side of the bore 27 on the opposite side of the valve is linked via other connecting bores (not shown) to the pressure intensifier for the blade 9 that is located within the housing 10.
  • the pressure chamber 20 is pressurized by the pressurizing fluid to move the piston 16 and thereby the anvil pin 6 towards its seating cavity 8
  • the side of the valve 13 opposite the plunger 26 is also pressurized by the pressurizing fluid.
  • the pressurizing fluid can immediately flow through the valve seat 30 to commence charging of the pressure intensifier for operation of the blade 9.
  • the blade 9 will commence its travel down the body 2 between the arms 3, 4 to contact the anvil pin 6 as soon as the pressure intensifier has built up the requisite high pressure feed for the hydraulic ram that powers it.
  • Such pressures are typically up to 700 bar.
  • the blade 9 is guided as it slides between the arms 3, 4 in longitudinally orientated parallel grooves 33 formed in strengthening guide plates 34 attached to the inside of the arms 3, 4.
  • the grooves 33 continue in the arms 3, 4 themselves below the level of the seating cavity 8 to allow the blade 9 to be removed from the tool for maintenance or replacement, when necessary.
  • the cutting tool 1 is attached to equipment with which it is to be used, for example to a manipulator arm of a remotely operated underwater vehicle and hydraulic fluid supply/return hoses are attached to the inlet/outlet ports 11 and 12.
  • the anvil pin 6 In its standby or rest condition, the anvil pin 6 is in maintained in its first position with the aperture 5 open and the blade 9 is in a retracted position within the body 2 at the top of the aperture 5.
  • the body 2 can then be manipulated so that the item to be cut is located in the aperture 5 between the arms.
  • the item is a wire rope, cable or the like and has an diameter up to around 300 mm.
  • Pressurizing fluid is therefore pumped through the inlet/outlet port 11 to pressurize the pressure chamber 20 and the bore 27 on the side of the valve 13 opposite the plunger 26.
  • the pressurizing fluid moves the piston 16 inwardly along the bore 17 to rotate the lever 14 towards the body 2 which in turn moves the anvil pin 6 from its first position into its second position and pushes the plunger 26 deeper into the bore 27.
  • the piston 16 reaches the end of this stroke, the anvil pin 6 starts to seat in the seating cavity 8 and assuming the cavity is unobstructed, the anvil pin 6 will enter fully into the cavity 8 and seat correctly.
  • the cutting tool of the present invention will be powered hydraulically using oil, as described above.
  • oil as described above.
  • it will be appreciated that it could also be operated pneumatically with suitable changes as would be obvious to a man skilled in the art.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Forests & Forestry (AREA)
  • Shearing Machines (AREA)

Abstract

La présente invention se rapporte à un outil de découpe mécanique (1) destiné à être utilisé essentiellement, mais pas exclusivement, sous l’eau, par exemple dans des conditions sous-marines par fixation de l’outil à un bras de manipulation d’un véhicule télécommandé. L’outil (1) comprend un corps dédoublé (2) pourvu de premier et second bras espacés (3, 4). Une tige d’enclume (6) peut effectuer un mouvement alternatif à travers le premier bras (3) entre une première et une seconde position dans laquelle elle est reçue dans le second bras (4). Une lame (9) peut coulisser entre les bras du corps pour entrer en contact avec la tige d’enclume (6) lorsque la tige d’enclume (6) se trouve dans sa seconde position. Des moyens (14, 16; 10) sont également utilisés pour déclencher le déplacement de la tige d’enclume (6) et la lame (9) à l’aide d’un fluide de pressurisation, et empêchent l’écoulement du fluide de pressurisation destiné à mettre la lame (9) sous tension avant la réception adéquate de la tige d’enclume, qui doit être reçue de façon appropriée dans le second bras (4) du corps (2).
PCT/GB2009/002432 2008-10-16 2009-10-09 Outil de découpe mécanique WO2010043850A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0818938A GB2464342B (en) 2008-10-16 2008-10-16 A powered cutting tool
GB0818938.3 2008-10-16

Publications (1)

Publication Number Publication Date
WO2010043850A1 true WO2010043850A1 (fr) 2010-04-22

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ID=40084102

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2009/002432 WO2010043850A1 (fr) 2008-10-16 2009-10-09 Outil de découpe mécanique

Country Status (2)

Country Link
GB (1) GB2464342B (fr)
WO (1) WO2010043850A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017099607A1 (fr) 2015-12-11 2017-06-15 Smart Installations As Procédé et outil de coupe mobile pour découper une structure tubulaire sous-marine
EP3482858A1 (fr) * 2017-11-08 2019-05-15 Rotech Group Limited Outil de coupe submersible amélioré
US20200290136A1 (en) * 2017-11-29 2020-09-17 Smart Installations As Method for cutting a tubular structure at a drill floor and a cutting tool for carrying out such method
CN113458476A (zh) * 2021-06-23 2021-10-01 南京群峯科技新材料有限公司 一种铜棒加工用截断装置及其截断方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8783149B2 (en) * 2011-04-04 2014-07-22 General Electric Company Coil cutting tool and method
DE102012214010B4 (de) 2012-08-07 2014-05-28 Wobben Properties Gmbh Spannlitzentrennvorrichtung und Schneidkörper für solch eine Spannlitzentrennvorrichtung
CN106584575B (zh) * 2016-12-22 2018-05-11 安徽暖阳信息科技有限公司 一种通信导线切割固定装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2310842A (en) * 1996-03-07 1997-09-10 Gec Alsthom Ltd Cutting a flexible elongate tensile mooring member

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
US3788173A (en) * 1972-12-15 1974-01-29 R Keigley Hydraulic hand tool
SU472005A2 (ru) * 1973-02-14 1975-05-30 Войсковая Часть 45632 Ручное устройство дл резки тросов
CA1250508A (fr) * 1986-10-02 1989-02-28 Gestion Hego Inc. Outil coupe-cable metallique
RU2000923C1 (ru) * 1991-03-01 1993-10-15 Научно-производственное предпри тие "Приоритет-ТС" Ручной гидравлический резак

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2310842A (en) * 1996-03-07 1997-09-10 Gec Alsthom Ltd Cutting a flexible elongate tensile mooring member

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017099607A1 (fr) 2015-12-11 2017-06-15 Smart Installations As Procédé et outil de coupe mobile pour découper une structure tubulaire sous-marine
EP3387213A4 (fr) * 2015-12-11 2019-06-19 Smart Installations As Procédé et outil de coupe mobile pour découper une structure tubulaire sous-marine
US10364633B2 (en) 2015-12-11 2019-07-30 Smart Installations As Method and mobile cutting tool for cutting a subsea tubular structure
EP3482858A1 (fr) * 2017-11-08 2019-05-15 Rotech Group Limited Outil de coupe submersible amélioré
GB2570034B (en) * 2017-11-08 2020-09-09 Rotech Group Ltd An underwater tool comprising a grabber arrangement and a cutter arrangement
US20200290136A1 (en) * 2017-11-29 2020-09-17 Smart Installations As Method for cutting a tubular structure at a drill floor and a cutting tool for carrying out such method
CN113458476A (zh) * 2021-06-23 2021-10-01 南京群峯科技新材料有限公司 一种铜棒加工用截断装置及其截断方法

Also Published As

Publication number Publication date
GB2464342A (en) 2010-04-21
GB0818938D0 (en) 2008-11-19
GB2464342B (en) 2013-12-18

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