EP0530044A1 - Appareil pour le draguage d'une masse d'eau - Google Patents

Appareil pour le draguage d'une masse d'eau Download PDF

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Publication number
EP0530044A1
EP0530044A1 EP92307873A EP92307873A EP0530044A1 EP 0530044 A1 EP0530044 A1 EP 0530044A1 EP 92307873 A EP92307873 A EP 92307873A EP 92307873 A EP92307873 A EP 92307873A EP 0530044 A1 EP0530044 A1 EP 0530044A1
Authority
EP
European Patent Office
Prior art keywords
kite
sweep
wire
winch
point
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Withdrawn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
EP92307873A
Other languages
German (de)
English (en)
Inventor
William Richard Arthur Allen
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.)
Baj Ltd
Original Assignee
Baj Ltd
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 Baj Ltd filed Critical Baj Ltd
Publication of EP0530044A1 publication Critical patent/EP0530044A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G7/00—Mine-sweeping; Vessels characterised thereby
    • B63G7/02—Mine-sweeping means, Means for destroying mines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63G—OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS
    • B63G7/00—Mine-sweeping; Vessels characterised thereby
    • B63G7/02—Mine-sweeping means, Means for destroying mines
    • B63G7/04—Mine-sweeping means, Means for destroying mines by means of cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/56—Towing or pushing equipment
    • B63B21/66—Equipment specially adapted for towing underwater objects or vessels, e.g. fairings for tow-cables

Definitions

  • This invention relates to apparatus for sweeping a body of water with flexible elements, hereinafter called cables, at levels between the surface and the bottom.
  • the invention is particularly concerned with mine sweeping but it will become apparent that it could be used for other purposes such as surveying, searching and locating.
  • Mines are often swept by means of a so called double Oropesa sweep system which employs a single mine sweeper from which a single towing cable leads to a depressor which is a passive guide device or kite which, as the mine sweeper tows the depressor through the water, is pressed down by hydrodynamic forces to hold the end of the kite wire to which it is connected at a distance below the surface which is dependent on the speed of the mine sweeper and the length of cable deployed.
  • a depressor which is a passive guide device or kite which, as the mine sweeper tows the depressor through the water, is pressed down by hydrodynamic forces to hold the end of the kite wire to which it is connected at a distance below the surface which is dependent on the speed of the mine sweeper and the length of cable deployed.
  • sweep cables which, in mine sweeping, carry cutters
  • the outer ends of the sweep cables are also attached to the bottom ends of pendant cables to the upper ends of which floats are attached thus maintaining the diverters at a predetermined distance below the surface of the water.
  • a double Oropesa sweep apparatus comprises mine sweeping winch means having two winding surfaces receiving port and starboard kite wires respectively to which are attached port and starboard sweep wires respectively, each sweep wire having at its outer end a diverter, a kite suspended by a kite pendant from a point on one of the kite wire/sweep wire elements and a connecting flexible bond connected at one end to a point on the assembly comprising the said one element, said kite and said kite pendant and connected at the other end to the other kite wire/sweep wire element.
  • the connecting bond which may be a cable, chain or the like, is connected at said one end to the kite.
  • the connecting bond it is preferred for the connecting bond to extend between a point on the said one element, at or closely adjacent to the point of connection of the kite pendant, to the other element.
  • a double Oropesa sweep apparatus comprises mine sweeping winch means having two commonly rotating winding surfaces receiving port and starboard kite wires respectively to which are attached port and starboard sweep wires respectively, each sweep wire having at its outer end a diverter, a kite suspended by a kite pendant from a point on one of the kite wire/sweep wire elements, and a connecting flexible bond extending from a point on the said one element at or closely adjacent to the point of connection of the kite pendant and connected at the other end to the other kite wire/sweep wire element.
  • the connecting bond is connected to each of the said elements at or adjacent the point of attachment of the kite wire to the sweep wire of the respective element.
  • the connection at one end of the connecting bond is by means of a snatch block, that is to say a pulley wheel so constructed that it can be attached to and run on a wire at a point intermediate the length of the wire without access to the end of the wire.
  • the winch means comprises a winch having a single barrel which, in a preferred construction, is divided into two winding sections by a circumferential flange but could alternatively have two separate barrels mounted on a common drive shaft or, for example, on separate drive shafts mounted to be driven simultaneously and at speeds to provide identical winding rates on the two barrels.
  • the winch means could comprise two separate winches arranged to be driven simultaneously and at speeds to produce identical winching rates.
  • a mine sweeper carries adjacent its stern a mine sweeping winch comprising a single barrel of which the winding surface is divided into two zones by a circumferential flange, the winch being the sole mine sweeping winch on the mine sweeper.
  • a mine sweeper can be used to operate with the double Oropesa sweep apparatus comprised in the first or second aspect of the invention.
  • the sweep apparatus shown in Figure 1 of the drawings is deployed from a mine sweeper 10 of which only the stern portion having guard rails 9 is shown.
  • the sweep apparatus includes two kite wire/sweep wire elements 11 and 12, a single multiplane passive depressor kite 13, multiplane passive diverters 14 and 15 and floats 16 and 17.
  • the mine sweeper carries a simple winch 21 with a single barrel 22 the surface of which is divided in two by a central circumferential flange 23.
  • Each kite wire/sweep wire element comprises a kite wire 24,25 of 20mm diameter x 550m long steel wire rope and a sweep wire 26,27 of 18mm diameter x 365m long steel wire rope connected together by a swivel assembly 28,29.
  • One end of each kite wire 24,25 is anchored to the barrel 22.
  • the sweep wire 26 of the port cable is left hand lay and the sweep wire of the starboard cable 27 is right hand lay.
  • Each of the sweep wires carries explosive cutters 30 spaced along its length and held in position by mechanical stops provided along the sweep wire and carries a mechanical end cutter 31 adjacent the outboard end.
  • each of the sweep wires 26,27 is connected to the respective diverter 14,15 whose planes are disposed vertically in order to provide a laterally directed force to move the ends of the sweep wires outwardly and away from each other.
  • the depths of the diverters 14,15 are determined by the lengths of the float pendants 32,33 by which the floats 16,17 are connected to the diverters 14,15 respectively.
  • One end of a wire cable bond 35 is connected at one end to the swivel assembly 29 of the starboard kite wire/sweep wire cable 12 and the other end of the bond 35 carries an openable snatch block 36 through which runs the port kite wire 24.
  • This port kite wire 24 is slightly longer than the starboard kite wire 25 so that the snatch block 36 engages on the port kite wire 24 a short distance ahead of the port swivel assembly 28.
  • kite pendant 34 The upper end of a kite pendant 34 is fastened to the swivel link assembly 29 of the starboard kite wire/sweep wire cable 12 while the lower end is connected to the kite 13, the planes of the kite 13 being arranged horizontally so that it provides, as it is drawn through the water by forward motion of the mine sweeper, a downwardly directed force to hold the swivel link assemblies and hence the forward ends of the sweep wires 25 at approximately the same level as the diverters 14 and 15 are held by the floats 16 and 17, the speed of movement of the mine sweeper 10 and the heaving and veering (winding in and letting out) of the kite wires 24 by the winch 21 being adjusted to achieve this result.
  • kite wires do not pass over three-roller fairleads at the transom of the mine sweeper as is the usual case with sweeping systems but pass through two fairleads 41 of the hanging pulley block type which are able readily to align themselves with the wire and which have a diameter and groove configuration such as to provide the correct bend radius and full wire support to the kite wires. Davits, not shown, are provided for deploying and recovering the depresser kite and the diverters.
  • winch has been described in use in a double Oropesa sweep system it will be appreciated that once installed it can also be used for single Oropesa and team sweep systems.
  • FIG. 2 The arrangement shown in Figure 2 is similar to that shown in Figure 1, like parts being given the same reference numerals but with a prime.
  • the connecting bond 35′ is connected at one end to the swivel assembly 28′ of the port kite wire/sweep wire element 11′ and has the snatch block 36′ at the other end, the starboard kite wire 25′ running through the snatch block.
  • the deployed part of the starboard kite wire 25′ which is slightly longer than the deployed part of the port kite wire.
  • This arrangement is of particular advantage where the two barrels of the winch 21 can be controlled independently by contrast with the single winch of the apparatus of Figure 1.
  • FIG. 3 The arrangement shown in Figure 3 is again similar to that shown in Figure 1, like parts being given the same reference numerals but with a double prime.
  • the connecting bond 35 ⁇ is connected at one end by a swivel to the connection between the kite pendant 34 ⁇ and the kite harness.
  • the other end of the connecting bond 35 ⁇ has a snatch block through which the port kite wire 24 ⁇ runs.
  • the starboard kite wire 25′,25 ⁇ passes through a device 50′,50 ⁇ having a transducer which detects the tension in the kite wire.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Toys (AREA)
EP92307873A 1991-08-30 1992-08-28 Appareil pour le draguage d'une masse d'eau Withdrawn EP0530044A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9118600 1991-08-30
GB919118600A GB9118600D0 (en) 1991-08-30 1991-08-30 Apparatus for sweeping a body of water

Publications (1)

Publication Number Publication Date
EP0530044A1 true EP0530044A1 (fr) 1993-03-03

Family

ID=10700682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92307873A Withdrawn EP0530044A1 (fr) 1991-08-30 1992-08-28 Appareil pour le draguage d'une masse d'eau

Country Status (7)

Country Link
EP (1) EP0530044A1 (fr)
KR (1) KR930004148A (fr)
AU (1) AU2200792A (fr)
CA (1) CA2077129A1 (fr)
GB (1) GB9118600D0 (fr)
NO (1) NO923317L (fr)
TR (1) TR26422A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014173979A1 (fr) * 2013-04-25 2014-10-30 Cgg Services Sa Dispositif de coupe destiné à un système de relevé marin et procédé correspondant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6634273B2 (en) * 2001-05-15 2003-10-21 Edo Corporation Open loop minesweeping system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3613629A (en) * 1969-12-23 1971-10-19 Us Navy Buoyant cable towing system
US3866561A (en) * 1973-09-25 1975-02-18 Us Navy Self-deploying variable float pendant
US4020780A (en) * 1969-11-05 1977-05-03 The United States Of America As Represented By The Secretary Of The Navy Mooring cable cutting system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020780A (en) * 1969-11-05 1977-05-03 The United States Of America As Represented By The Secretary Of The Navy Mooring cable cutting system
US3613629A (en) * 1969-12-23 1971-10-19 Us Navy Buoyant cable towing system
US3866561A (en) * 1973-09-25 1975-02-18 Us Navy Self-deploying variable float pendant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014173979A1 (fr) * 2013-04-25 2014-10-30 Cgg Services Sa Dispositif de coupe destiné à un système de relevé marin et procédé correspondant
US9796455B2 (en) 2013-04-25 2017-10-24 Sercel Sa Cutter device for marine survey system and related method

Also Published As

Publication number Publication date
GB9118600D0 (en) 1992-10-07
CA2077129A1 (fr) 1993-03-01
NO923317L (no) 1993-03-01
AU2200792A (en) 1993-03-04
NO923317D0 (no) 1992-08-25
KR930004148A (ko) 1993-03-22
TR26422A (tr) 1995-03-15

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