WO1996022935A1 - Apparatus and a method for use in handling a load - Google Patents

Apparatus and a method for use in handling a load Download PDF

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Publication number
WO1996022935A1
WO1996022935A1 PCT/GB1996/000158 GB9600158W WO9622935A1 WO 1996022935 A1 WO1996022935 A1 WO 1996022935A1 GB 9600158 W GB9600158 W GB 9600158W WO 9622935 A1 WO9622935 A1 WO 9622935A1
Authority
WO
WIPO (PCT)
Prior art keywords
rope
service cable
load
drum
service
Prior art date
Application number
PCT/GB1996/000158
Other languages
French (fr)
Inventor
Alexander Charles Crawford
Original Assignee
Deep Water Recovery & Exploration 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 Deep Water Recovery & Exploration Limited filed Critical Deep Water Recovery & Exploration Limited
Priority to NZ298874A priority Critical patent/NZ298874A/en
Priority to DE69603451T priority patent/DE69603451T2/en
Priority to AU44567/96A priority patent/AU691070B2/en
Priority to JP52272796A priority patent/JP3472307B2/en
Priority to EP96900671A priority patent/EP0805776B1/en
Publication of WO1996022935A1 publication Critical patent/WO1996022935A1/en
Priority to GR990402713T priority patent/GR3031615T3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/12—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices
    • B66C13/14—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices to load-engaging elements or motors associated therewith

Definitions

  • This invention relates to apparatus for use in handling a load which is capable of raising and lowering, or of towing, a load and also handling service cables and/or hoses connected to the load.
  • the invention is particularly, but not exclusively, applicable to the handling of subsea equipment such as grabs.
  • apparatus for use in handling a load comprises a load- bearing rope, a mechanism for paying out and recovering the rope, a drum for holding a service cable with a length of the service cable extending therefrom, and a wrapping device for rotating said length of service cable around the rope as the rope is payed out to wrap the service cable around the rope, and to unwrap the service cable from the rope as the rope is recovered.
  • a method of handling a load comprises paying out a load-bearing rope and wrapping a service cable around the rope as it is payed out, and subsequently unwrapping the service cable from the rope as the rope is recovered.
  • service cable is used herein to denote a flexible elongate member used for conveying power or data, such as an electrical cable, a fibre optic cable, or a pneumatic or hydraulic hose.
  • the service cable is wrapped helically around the rope.
  • the load-bearing rope will be a hoist rope used for raising and lowering a load.
  • the load-bearing rope may be a towing rope used for paying out, towing and recovering a load such as a marine sensor array.
  • the apparatus may include a plurality of service cables each extending from a respective drum.
  • the mechanism for paying out and recovering the rope comprises a rope winch, from which the rope passes over a rope sheave and thereafter extends to the load along a substantially straight axis.
  • the wrapping device may comprise the or each service cable drum being arranged for rotation about a drum axis which coincides with said axis, the drum typically having a central aperture through which the load- bearing rope passes, said length of service cable preferably passing over a service cable sheave which is mounted for movement in a circular path around said axis.
  • the or each service cable drum may be rotatable on a structural member which is arranged for movement in a circular path about said axis.
  • the hoist rope winch, the or each service cable drum, and the wrapping device may conveniently each have a respective driving motor; they could however be driven by a single source through appropriate mechanical linkages.
  • Fig. 1 is a schematic perspective view illustrating the principle of operation of a first example of the invention
  • Fig. 2 is a more detailed side view, partly in section, of an apparatus used in the example of Fig. 1
  • Fig. 3 is a view similar to Fig. 1 illustrating a modification of the arrangement of Fig. 1
  • Fig. 4 is a schematic perspective view illustrating a second example of the invention
  • Fig. 5 is a side view of an apparatus used in the example of Fig. 4
  • Fig. 6 is a schematic perspective view illustrating a third example similar to that of Fig. 1 but modified for towing rather than lifting
  • Fig. 7 illustrates a fourth example similar to that of Fig. 4 but modified for towing rather than lifting.
  • a hoist rope 1 extends from a hoist rope winch 13 over a hoist rope sheave 4 to support a load (not shown) for raising and lowering.
  • the hoist rope 1 may be any suitable form of hoist rope such as flexible steel wire rope or synthetic fibre rope, for example of "Kevlar”.
  • a service cable 2 is reeled on a service cable drum 3 and extends to the load via a service cable sheave 5.
  • the hoist rope 1 passes through a central aperture of the service cable drum 3, and the service cable sheave 5 is arranged to be driven circumferentially around the axis of the service cable 1.
  • the service cable drum 3 and the service cable sheave 5 By coordinating the movements of the hoist rope winch 13, the service cable drum 3 and the service cable sheave 5, the service cable 2 can be wrapped helically around the hoist rope 1 as the load is lowered, and unwrapped as the load is raised. In this way, a hoist rope of any desired properties can be used in combination with any required service connection.
  • Fig. 2 shows the service cable drum 3 and associated parts in greater detail.
  • the hoist rope sheave 4 is journalled to a fixed frame 20 which is secured to any suitable supporting structure (not shown) .
  • the service cable drum 3 is rotatably mounted on the lower part of the frame 20 and driven in rotation by a motor 6.
  • the inner end of the service cable 2 is connected to the appropriate service by a coupling assembly 8 which comprises a slipring arrangement in the case of electrical or fibre optic services or a rotary coupling in the case of pneumatic or hydraulic services; such rotary couplings are well known per se.
  • a coupling assembly 8 which comprises a slipring arrangement in the case of electrical or fibre optic services or a rotary coupling in the case of pneumatic or hydraulic services; such rotary couplings are well known per se.
  • the service cable sheave 5 is journalled on a mounting frame 9 which is rotatable about the fixed frame 20 by means of a motor 7.
  • the service cable 2 shown in this embodiment may be a single cable or hose, or may be a specially made cable comprising a plurality of cable(s)/hose(s) .
  • the motors 6 and 7 are driven at speeds related to the axial speed of the hoist rope 1.
  • the speed correlation may be fixed. Preferably, however, this correlation will be controllable to alter both the length of twist (pitch) of the lay of the service cable 2 on the hoist rope 1, and the tension in the service cable 2.
  • Fig. 3 shows a modification in which a second service cable 17 is wrapped on the hoist rope 1 along with the service cable 2.
  • the service cables 2, 17 are each provided with a respective storage drum 15, 16 and a respective sheave 5, 14 which may suitably be carried on a common supporting frame for rotation in unison.
  • the apparatus may be further modified by adding further drums and sheaves to handle more services.
  • Fig. 4 illustrates a second example in which the service cable 2 is reeled on a drum 3 and the drum 3 is itself rotated about the hoist rope 1 to achieve a helical wrap and unwrap.
  • the service cable drum 3 may be constituted by a drum 12 removably mounted on a hub motor 11 which is carried on the end of an arm 18 rotatably mounted on the fixed frame 20 and driven by a motor 10.
  • Figs. 4 and 5 could be modified by adding further service cable drums to be rotated by the motor 10.
  • Fig. 6 illustrates the example of Fig. 1 modified for use in a marine towing application, for example in paying out, towing and recovering a sensor array such as a sonar sensor or seismographic surveying sensor, the sensor array being towed underwater or on the surface.
  • the service cable drum 3 is hinged to the main structure of the towing vessel (not shown) and can be tilted to a desired towing angle by hydraulic or other mechanisms.
  • Fig. 7 illustrates the modification of the example of Fig. 4 for the same use, the frame carrying the mounting arm for the service cable drum 3 being hinged to the vessel and tilted to the desired angle by hydraulic or other mechanisms.
  • the invention may be applied to a system in which one or more service cables is applied to a load-bearing rope which itself carries a service channel in addition to fulfilling its load-bearing function.
  • the load-bearing rope could be a steel wire rope carrying electrical signals, or a rope comprising "Kevlar" load-bearing strands in combination with optical fibre cable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
  • Control And Safety Of Cranes (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Mechanical Means For Catching Fish (AREA)

Abstract

Apparatus and a method for use in handling a load is described. The apparatus includes a load-bearing rope (1, 19), and a mechanism for paying out and recovering the rope (1, 19). There is also a drum (3, 12, 15, 16) for holding a service cable (2, 17) with a length of the service cable (2, 17) extending from the drum (3, 12, 15, 16). A wrapping device rotates the length of service cable (2, 17) around the rope (1, 19) as the rope (1, 19) is payed out to wrap the service cable (2, 17) around the rope (1, 19), and to unwrap the service cable (2, 17) from the rope (1, 19) as the rope is recovered.

Description

"Apparatus and a Method for Use in Handling a Load"
This invention relates to apparatus for use in handling a load which is capable of raising and lowering, or of towing, a load and also handling service cables and/or hoses connected to the load. The invention is particularly, but not exclusively, applicable to the handling of subsea equipment such as grabs.
Hitherto, providing services to underwater equipment has required the provision of a specific bundle of cable(s) and/or hose(s) dedicated to each application. For some applications, it is known to incorporate the service bundle within an armoured hoist rope. This approach has a number of deficiencies. The resulting rope is costly, gives inferior hoisting properties, and by virtue of limitations on the diameter of rope which can be handled the services which can be incorporated are limited. Further, in practice it is impossible with this arrangement to add to the length of the rope or to join different types of materials, for example wire ropes with fibre ropes.
In accordance with an aspect of the present invention, apparatus for use in handling a load comprises a load- bearing rope, a mechanism for paying out and recovering the rope, a drum for holding a service cable with a length of the service cable extending therefrom, and a wrapping device for rotating said length of service cable around the rope as the rope is payed out to wrap the service cable around the rope, and to unwrap the service cable from the rope as the rope is recovered.
In accordance with another aspect of the present invention, a method of handling a load comprises paying out a load-bearing rope and wrapping a service cable around the rope as it is payed out, and subsequently unwrapping the service cable from the rope as the rope is recovered.
The term "service cable" is used herein to denote a flexible elongate member used for conveying power or data, such as an electrical cable, a fibre optic cable, or a pneumatic or hydraulic hose.
Preferably, the service cable is wrapped helically around the rope.
Typically, the load-bearing rope will be a hoist rope used for raising and lowering a load. Alternatively, the load-bearing rope may be a towing rope used for paying out, towing and recovering a load such as a marine sensor array.
The apparatus may include a plurality of service cables each extending from a respective drum.
Preferably, the mechanism for paying out and recovering the rope comprises a rope winch, from which the rope passes over a rope sheave and thereafter extends to the load along a substantially straight axis. The wrapping device may comprise the or each service cable drum being arranged for rotation about a drum axis which coincides with said axis, the drum typically having a central aperture through which the load- bearing rope passes, said length of service cable preferably passing over a service cable sheave which is mounted for movement in a circular path around said axis.
Alternatively, the or each service cable drum may be rotatable on a structural member which is arranged for movement in a circular path about said axis.
The hoist rope winch, the or each service cable drum, and the wrapping device may conveniently each have a respective driving motor; they could however be driven by a single source through appropriate mechanical linkages.
Examples of apparatus and a method for use in handling a load in accordance with the invention will now be described with reference to the drawings, in which:-
Fig. 1 is a schematic perspective view illustrating the principle of operation of a first example of the invention; Fig. 2 is a more detailed side view, partly in section, of an apparatus used in the example of Fig. 1; Fig. 3 is a view similar to Fig. 1 illustrating a modification of the arrangement of Fig. 1; Fig. 4 is a schematic perspective view illustrating a second example of the invention; Fig. 5 is a side view of an apparatus used in the example of Fig. 4; Fig. 6 is a schematic perspective view illustrating a third example similar to that of Fig. 1 but modified for towing rather than lifting; and Fig. 7 illustrates a fourth example similar to that of Fig. 4 but modified for towing rather than lifting.
Referring to Fig. 1, a hoist rope 1 extends from a hoist rope winch 13 over a hoist rope sheave 4 to support a load (not shown) for raising and lowering. The hoist rope 1 may be any suitable form of hoist rope such as flexible steel wire rope or synthetic fibre rope, for example of "Kevlar". A service cable 2 is reeled on a service cable drum 3 and extends to the load via a service cable sheave 5.
The hoist rope 1 passes through a central aperture of the service cable drum 3, and the service cable sheave 5 is arranged to be driven circumferentially around the axis of the service cable 1. By coordinating the movements of the hoist rope winch 13, the service cable drum 3 and the service cable sheave 5, the service cable 2 can be wrapped helically around the hoist rope 1 as the load is lowered, and unwrapped as the load is raised. In this way, a hoist rope of any desired properties can be used in combination with any required service connection.
Fig. 2 shows the service cable drum 3 and associated parts in greater detail. The hoist rope sheave 4 is journalled to a fixed frame 20 which is secured to any suitable supporting structure (not shown) . The service cable drum 3 is rotatably mounted on the lower part of the frame 20 and driven in rotation by a motor 6.
The inner end of the service cable 2 is connected to the appropriate service by a coupling assembly 8 which comprises a slipring arrangement in the case of electrical or fibre optic services or a rotary coupling in the case of pneumatic or hydraulic services; such rotary couplings are well known per se.
The service cable sheave 5 is journalled on a mounting frame 9 which is rotatable about the fixed frame 20 by means of a motor 7.
The service cable 2 shown in this embodiment may be a single cable or hose, or may be a specially made cable comprising a plurality of cable(s)/hose(s) .
The motors 6 and 7 are driven at speeds related to the axial speed of the hoist rope 1. The speed correlation may be fixed. Preferably, however, this correlation will be controllable to alter both the length of twist (pitch) of the lay of the service cable 2 on the hoist rope 1, and the tension in the service cable 2.
Fig. 3 shows a modification in which a second service cable 17 is wrapped on the hoist rope 1 along with the service cable 2. In this modification, the service cables 2, 17 are each provided with a respective storage drum 15, 16 and a respective sheave 5, 14 which may suitably be carried on a common supporting frame for rotation in unison.
The apparatus may be further modified by adding further drums and sheaves to handle more services.
Fig. 4 illustrates a second example in which the service cable 2 is reeled on a drum 3 and the drum 3 is itself rotated about the hoist rope 1 to achieve a helical wrap and unwrap. As shown in more detail in Fig. 5, the service cable drum 3 may be constituted by a drum 12 removably mounted on a hub motor 11 which is carried on the end of an arm 18 rotatably mounted on the fixed frame 20 and driven by a motor 10.
As with the first example, the example shown in Figs. 4 and 5 could be modified by adding further service cable drums to be rotated by the motor 10.
Fig. 6 illustrates the example of Fig. 1 modified for use in a marine towing application, for example in paying out, towing and recovering a sensor array such as a sonar sensor or seismographic surveying sensor, the sensor array being towed underwater or on the surface. The service cable drum 3 is hinged to the main structure of the towing vessel (not shown) and can be tilted to a desired towing angle by hydraulic or other mechanisms. Likewise, Fig. 7 illustrates the modification of the example of Fig. 4 for the same use, the frame carrying the mounting arm for the service cable drum 3 being hinged to the vessel and tilted to the desired angle by hydraulic or other mechanisms.
The invention may be applied to a system in which one or more service cables is applied to a load-bearing rope which itself carries a service channel in addition to fulfilling its load-bearing function. For example, the load-bearing rope could be a steel wire rope carrying electrical signals, or a rope comprising "Kevlar" load-bearing strands in combination with optical fibre cable.
Other modifications may be made within the scope of the invention.

Claims

QLMH&
1. Apparatus for use in handling a load, the apparatus comprising a load-bearing rope (1,19), a mechanism for paying out and recovering the rope (1,19), a drum (3,12,15,16) for holding a service cable (2,17) with a length of the service cable (2,17) extending therefrom, and a wrapping device for rotating said length of service cable (2,17) around the rope (1,19) as the rope is payed out to wrap the service cable (2,17) around the rope, and to unwrap the service cable (2,17) from the rope (1,19) as the rope is recovered.
2. Apparatus according to claim 1, wherein there are a plurality of service cables (2,17) each extending from a respective drum(3,12,15,16) .
3. Apparatus according to claim 1 or claim 2, wherein the means for paying out and recovering the rope (1,19) comprises a rope winch (13), from which the rope (1,19) passes over a rope sheave (14) and thereafter extends to the load along a substantially straight axis.
4. Apparatus according to claim 3, wherein the wrapping device comprises the or each service cable drum (3,12,15,16) being arranged for rotation about a drum axis which coincides with said axis.
5. Apparatus according to claim 4, wherein the or each service cable drum (3,12,15,16) has a central aperture through which the load-bearing rope (1,19) passes.
6. Apparatus according to any of claims 3 to 5, wherein the length of service cable (2,17) passes over a service cable sheave (5,14) which is mounted for movement in a circular path around said axis.
7. Apparatus according to claim 3, wherein the or each service cable drum (3,12,15,16) is rotatable on a structural member (20) which is arranged for movement in a circular path about said axis.
8. Apparatus according to any of claims 3 to 7, wherein the rope winch (13), the or each service cable drum (3,12,15,16) and the wrapping device each have a respective driving motor (6,7,10).
9. Apparatus according to any of claims 3 to 7, wherein the rope winch (13), the or each service cable drum (3,12,15,16) and the wrapping device are driven by a single source through appropriate mechanical linkages.
10. A method for use in handling a load, the method comprising paying out a load-bearing rope and wrapping a service cable around the rope as it is payed out, and subsequently unwrapping the service cable from the rope as the rope is recovered.
11. A method according to claim 10, wherein a plurality of service cables are wrapped around the rope as the rope is payed out.
PCT/GB1996/000158 1995-01-25 1996-01-25 Apparatus and a method for use in handling a load WO1996022935A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NZ298874A NZ298874A (en) 1995-01-25 1996-01-25 Winch mechanism with rope and service cable
DE69603451T DE69603451T2 (en) 1995-01-25 1996-01-25 DEVICE AND METHOD FOR USE IN HANDLING A LOAD
AU44567/96A AU691070B2 (en) 1995-01-25 1996-01-25 Apparatus and a method for use in handling a load
JP52272796A JP3472307B2 (en) 1995-01-25 1996-01-25 Load operation device and load operation method
EP96900671A EP0805776B1 (en) 1995-01-25 1996-01-25 Apparatus and a method for use in handling a load
GR990402713T GR3031615T3 (en) 1995-01-25 1999-10-26 Apparatus and a method for use in handling a load

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9501475.9A GB9501475D0 (en) 1995-01-25 1995-01-25 Hoist apparatus
GB9501475.9 1995-01-25

Publications (1)

Publication Number Publication Date
WO1996022935A1 true WO1996022935A1 (en) 1996-08-01

Family

ID=10768567

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/000158 WO1996022935A1 (en) 1995-01-25 1996-01-25 Apparatus and a method for use in handling a load

Country Status (9)

Country Link
EP (1) EP0805776B1 (en)
JP (1) JP3472307B2 (en)
AU (1) AU691070B2 (en)
DE (1) DE69603451T2 (en)
ES (1) ES2137656T3 (en)
GB (1) GB9501475D0 (en)
GR (1) GR3031615T3 (en)
NZ (1) NZ298874A (en)
WO (1) WO1996022935A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000056654A1 (en) * 1999-03-22 2000-09-28 Deep Tek Limited Apparatus and method for use in handling a load
WO2001025130A1 (en) * 1999-10-05 2001-04-12 Deep Tek Limited Apparatus and method for use in handling a load
WO2001060732A1 (en) * 2000-02-17 2001-08-23 Rockwater Limited Apparatus and method for handling cables

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE643817C (en) * 1930-12-24 1937-04-17 Siemens & Halske Akt Ges Device for producing telecommunication cables
CH473047A (en) * 1967-09-23 1969-05-31 Schenck Gmbh Carl Cable management device
DE2350352A1 (en) * 1973-10-08 1975-04-17 Peiner Masch Schrauben Electro-hydraulic grab for use with crane - has pump on superstructure supplying rams via hose and drum
FR2519181A1 (en) * 1981-12-30 1983-07-01 Cables De Lyon Geoffroy Delore Rotating cage bundled-cable winding machine - uses synchronised winders which firstly wind small groups of cables which are then wound together to form larger cable
DE3741192A1 (en) * 1987-12-04 1989-06-15 Man Ghh Krantechnik Lifting gear
DE9403464U1 (en) * 1994-03-02 1994-04-28 Schuster Siegfried Device for supplying oil to hydraulic gripper devices on hydraulic crane systems

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE643817C (en) * 1930-12-24 1937-04-17 Siemens & Halske Akt Ges Device for producing telecommunication cables
CH473047A (en) * 1967-09-23 1969-05-31 Schenck Gmbh Carl Cable management device
DE2350352A1 (en) * 1973-10-08 1975-04-17 Peiner Masch Schrauben Electro-hydraulic grab for use with crane - has pump on superstructure supplying rams via hose and drum
FR2519181A1 (en) * 1981-12-30 1983-07-01 Cables De Lyon Geoffroy Delore Rotating cage bundled-cable winding machine - uses synchronised winders which firstly wind small groups of cables which are then wound together to form larger cable
DE3741192A1 (en) * 1987-12-04 1989-06-15 Man Ghh Krantechnik Lifting gear
DE9403464U1 (en) * 1994-03-02 1994-04-28 Schuster Siegfried Device for supplying oil to hydraulic gripper devices on hydraulic crane systems

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000056654A1 (en) * 1999-03-22 2000-09-28 Deep Tek Limited Apparatus and method for use in handling a load
AU761706B2 (en) * 1999-03-22 2003-06-05 Deep Tek Ip Limited Apparatus and method for use in handling a load
US6698722B1 (en) 1999-03-22 2004-03-02 Deep Tek Limited Apparatus and method for use in handling a load
WO2001025130A1 (en) * 1999-10-05 2001-04-12 Deep Tek Limited Apparatus and method for use in handling a load
US6712336B1 (en) 1999-10-05 2004-03-30 Deep Tek Limited Apparatus and method for use in handling a load
AU778471B2 (en) * 1999-10-05 2004-12-09 Deep Tek Ip Limited Apparatus and method for use in handling a load
WO2001060732A1 (en) * 2000-02-17 2001-08-23 Rockwater Limited Apparatus and method for handling cables
GB2375094A (en) * 2000-02-17 2002-11-06 Rockwater Ltd Appartus and method for handling cables
GB2375094B (en) * 2000-02-17 2004-01-14 Rockwater Ltd Appartus and method for handling cables
US6752384B2 (en) 2000-02-17 2004-06-22 Rockwater Limited Apparatus and method for handling cables

Also Published As

Publication number Publication date
AU691070B2 (en) 1998-05-07
GR3031615T3 (en) 2000-01-31
DE69603451T2 (en) 2000-05-04
NZ298874A (en) 1999-01-28
EP0805776A1 (en) 1997-11-12
EP0805776B1 (en) 1999-07-28
GB9501475D0 (en) 1995-03-15
ES2137656T3 (en) 1999-12-16
AU4456796A (en) 1996-08-14
JPH10512838A (en) 1998-12-08
JP3472307B2 (en) 2003-12-02
DE69603451D1 (en) 1999-09-02

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