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WO2009020428A1 - Connecteur supportant une charge de ligne répartie - Google Patents

Connecteur supportant une charge de ligne répartie Download PDF

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Publication number
WO2009020428A1
WO2009020428A1 PCT/SG2007/000233 SG2007000233W WO2009020428A1 WO 2009020428 A1 WO2009020428 A1 WO 2009020428A1 SG 2007000233 W SG2007000233 W SG 2007000233W WO 2009020428 A1 WO2009020428 A1 WO 2009020428A1
Authority
WO
WIPO (PCT)
Prior art keywords
connector according
load
elongate
bore hole
jaw
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/SG2007/000233
Other languages
English (en)
Inventor
Brian Chang
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.)
Yantai CIMC Raffles Offshore Co Ltd
Original Assignee
Yantai Raffles Shipyard 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 Yantai Raffles Shipyard Ltd filed Critical Yantai Raffles Shipyard Ltd
Priority to PCT/SG2007/000233 priority Critical patent/WO2009020428A1/fr
Priority to BRPI0707975-3A priority patent/BRPI0707975A2/pt
Publication of WO2009020428A1 publication Critical patent/WO2009020428A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/64—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for T- or I-section beams or girders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof

Definitions

  • the present invention relates to a distributed line load-bearing connection between sheave blocks of a crane and apayload.
  • FIG. IA illustrates a conventional hauling of a load L with a hook 10 and a pair of slings 20
  • FIG. IB illustrates a conventional hauling of a load L with the use of slings 20, shackles 30 and pad-eyes 40.
  • JP8053294 describes a hanging device for a heavy article.
  • the hanging device has a plurality of jointed elongate members. Each of the jointed ends and free ends of the hanging device are connected to a rope of a hoist.
  • each of the elongate members is connected to the heavy article by another rope near each end of the elongate member such that the plurality of jointed elongate members is loaded in a distributed manner.
  • the hanging device also results in uniform loading on the plurality of hoists.
  • US 4,046,414 describes a load distribution device for lifting and moving an elongate truss structure.
  • the load distribution device prevents localized over-stressing or buckling of the truss members.
  • the present invention provides a distributed load-bearing connector.
  • the connector comprises: an elongate load-bearing beam; and an elongate jaw operable to engage slidably with the elongate load bearing beam such that the weight of a load is transferred evenly between the elongate load bearing beam and the elongate jaw when the load is suspended by the load bearing connector on a hoist line.
  • the load comprises a structure having one or more bulkheads.
  • the elongate load-bearing beam is connected to an extension of the or each respective bulkheads whilst the elongate jaw is connected to a tongue plate.
  • An opening of the elongate jaw is larger than the thickness of the bulkhead extension so that the elongate load-bearing beam and elongate jaw are operable to slidably engage with each other.
  • the elongate jaw is connected to an extension of the or each respective bulkheads whilst the elongate load-bearing beam is connected to a tongue plate.
  • An opening of the elongate jaw is larger than a thickness of the tongue plate so that the elongate load-bearing beam and elongate jaw are operable to slidably engage with each other.
  • one or more stiffeners are provided between the elongate jaw and the tongue plates.
  • a sectional shape of the load-bearing beam is proportional to a shape of an internal cavity of the elongate jaw for slidable engagement with each other.
  • the present invention provides a system for holding a load on a hoist line, wherein the load is made up of a structure comprising one or more bulkheads.
  • the system comprises a load bearing connector according to claim 1 or any one of claims 3-21.
  • the hoist line is a rope or a chain.
  • FIG. IA illustrates a conventional hoisting system using slings
  • FIG. IB illustrates another conventional hoisting system using a spreader beam and slings
  • FIG. 2A illustrates a hoisting system using line load in accordance with one embodiment of the present invention
  • FIG. 2B illustrates a sheave block and a line load bearing beam shown in FIG. 2A.
  • FIGs. 3A-3D illustrate various cross-sectional shapes of the line load bearing beam shown in FIG. 2B.
  • FIG. 2 A shows a distributed load hoisting system 100 according to an embodiment of the present invention.
  • the load L is illustrated by a large fabricated structure 110.
  • the fabricated structure 110 may be a pontoon of an oil rig platform or semi-submersible vessel; a storage tank; a bulk carrier; and so on, or a sub-module of any one of these.
  • Such structures 110 are fabricated with structural bulkheads and relatively thin membrane plates.
  • the distributed load hoisting system 100 is made up of a load bearing beam 120 connected to an extension of a bulkhead 130 of the fabricated structure 110 and a connector 140 for engaging with the load bearing beam 120.
  • FIG. 2B shows details of the connector 140 according to another embodiment of the present invention.
  • the connector 140 has two cheek plates 142 and two tongue plates 170.
  • Each cheek plate 142 is symmetrically triangular in shape.
  • each cheek plate 142 has an upper bore hole 144 near its apex and a slightly smaller bore hole 146 near each of the two corners at its base such that the lower bore holes 146 are symmetrically located with respect to the upper bore hole 144.
  • Each tongue plate 170 is also symmetrically triangular in shape and has a bore hole near its apex.
  • the two cheek plates 142 are assembled by bolts 160 and spacers such that they are substantially parallel to but spaced apart from each other; the bore holes on the tongue plate 170 are aligned with the respective lower bore holes 146 on the cheek plates 142 to define two substantially parallel axes Oa, Ob whilst the upper bore holes 144 on the cheek plates 142 define a third axis Oc, which is substantially parallel to the other two axes Oa, Ob.
  • the base edge of each tongue plate 170 has two open jaw-like bars 182 connected thereto such that the longitudinal axes of the jaw-like bars 182 are aligned with each and lie in the centre plane of the tongue plate 170.
  • each bore hole 144, 146 on the cheek and tongue plates has optionally a reinforcing ring 148.
  • the reinforcing ring 148 helps to reduce the stresses and strains around the bore holes.
  • a sheave 150 is disposed between the cheek plates 142 on the axis Oc.
  • the jaw-like bars 182 are slidably connected to the load bearing beam 120 so that the load 2T on each sheave 150 is distributed over the load beam 120 through the jaw-like bars 182 when the fabricated structure 110 is suspended on a crane, for example, during fabrication or assembly.
  • the opening 184 of the jaw-like bar 182 is slightly larger than the thickness of the extended bulkhead 130, whilst each jaw-like bar 182 of the connector 140 is formed with a hollow shape proportional to the sectional shape of the load bearing beam 120.
  • each connector 140 is disposed pivotably about the sheave 150. Due to the symmetrical design of each cheek and tongue plates, the load 2T on each connector 140 is shared evenly between the two tongue plates 170 so that the load 2T is distributed evenly through the jaw-like bars or jaws 182 to the load bearing bar 120.
  • FIG. 3A shows a round hollow cross-section of the load bearing beam 120 according to one embodiment of the present invention.
  • the thickness of the load beam 120 and the bulk head 130 extension are selected so that the designed strains and stresses comply with the relevant regulatory body or code of practice. For example, when the load bearing beam 120 is about 10 cm in diameter and the bulkhead thickness is 15 mm, the allowed tensile stress on the bulkhead is about lOOMPa for a line load of about 150 tonnes/m. In one embodiment, the bulkhead 130 extends out of the fabricated structure by about 40 cm or less.
  • the fabricated structure 110 is hoisted or held in a substantially horizontal attitude with the jaws 182 of the connector gripping on the load bearing beam 120 such that there is little bending stress on the bulkhead 130, which is kept at such a relatively low extension.
  • the extension height is also not too high for a workman to surmount, for example, when the load bearing beam 120 is laid across a deck of an oil rig.
  • the weight of the structure 110 is transferred onto the bulkhead(s) 130 when the structure 110 is suspended by the connectors 140.
  • FIG. 3B shows a square sectional load beam
  • FIG. 3 C shows a load beam 120 being made up of a composite of two square load beams, one on each of the two sides of the extended bulkhead 130.
  • FIG. 3D shows a rectangular sectional load beam forming a T joint with the extended bulkhead 130.
  • load bearing beams 120 are provided on the respective extended bulkheads 130.
  • loads on different sheaves or groups of sheaves 150 may be different and the line load in the respective sections of the respective load bearing beam 120 may also vary.
  • each tongue plate 170 has one jaw-like bar 182. In yet another embodiment, each tongue plate 170 has three or more jaw-like bars 182.
  • each connector 140 is shown with a set of triangular cheek plates 142 and tongue plates 170, each having three bore holes. It is possible that each connector has an additional symmetrically triangle plate, which is similar to the cheek plates 142, such that a sheave is connected to a bore hole near the apex of the additional triangular plate and each bore hole near the base of the additional triangular plate is connected to the bore hole 144 of the cheek plate 142. In other words, the additional symmetrically triangle plates are connected in series between the tongue plates 170 and the cheek plates 142.
  • the sheave 150 comprises two or more sheaves.
  • adjacent connectors 140 are pivotably connected by a link bar 190; the link bars 190 help to maintain uniform spacing of the jaws 182 to give uniform stresses and strains on the load bearing beam 120.
  • the jaws 182 are connected to the respective tongue plates 170 in addition to the stiffeners 186 by fabrication.
  • the tongue plates 170 and the respective jaws 182 are cast out integrally and machined.
  • the tongue plates 170 and respective jaws 182 are cast out integrally, forged and machined.
  • each tongue plate 170 is connected to the hoist rope directly through a shackle or thimble or indirectly through two or more sheaves.
  • the tongue plate 170 is made up of two plates.
  • the hoist line is a chain, and a chain block is used instead of a sheave block.
  • the hoists on the crane may be disposed on one girdle or more than one girdles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

L'invention concerne un connecteur supportant une charge de ligne répartie (140). Le connecteur (140) comprend une poutre de support de charge allongée (120) et une mâchoire allongée (182) pouvant être actionnée pour venir en contact de manière coulissante avec la poutre de support de charge allongée (120) de sorte que le poids d'une charge est transféré de manière régulière entre la poutre de support de charge allongée (120) et la mâchoire allongée (182) lorsque la charge est suspendue par le connecteur de support de charge (140) sur un câble de levage. Dans un mode réalisation, la poutre de support de charge (120) est reliée à un prolongement d'une cloison (130) de la charge (110) lorsque la mâchoire (182) est reliée à une languette (170) d'un bloc de poulies (140). Dans un autre mode de réalisation, la poutre de support de charge (120) est sur une languette (170) d'un bloc de poulies (140) lorsque la mâchoire (182) est sur un prolongement d'une cloison (130) de la charge (110).
PCT/SG2007/000233 2007-08-03 2007-08-03 Connecteur supportant une charge de ligne répartie Ceased WO2009020428A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/SG2007/000233 WO2009020428A1 (fr) 2007-08-03 2007-08-03 Connecteur supportant une charge de ligne répartie
BRPI0707975-3A BRPI0707975A2 (pt) 2007-08-03 2007-08-03 conector de mancal de carga

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SG2007/000233 WO2009020428A1 (fr) 2007-08-03 2007-08-03 Connecteur supportant une charge de ligne répartie

Publications (1)

Publication Number Publication Date
WO2009020428A1 true WO2009020428A1 (fr) 2009-02-12

Family

ID=40341535

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SG2007/000233 Ceased WO2009020428A1 (fr) 2007-08-03 2007-08-03 Connecteur supportant une charge de ligne répartie

Country Status (2)

Country Link
BR (1) BRPI0707975A2 (fr)
WO (1) WO2009020428A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101549836B (zh) * 2009-05-12 2012-05-02 中国一冶集团有限公司 封闭厂房内吊装超高超重设备的方法和专用吊具
CN113148169A (zh) * 2021-04-30 2021-07-23 中航电测仪器股份有限公司 一种直升机载荷传递及防偏摆结构和直升机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU852763A2 (ru) * 1979-08-06 1981-08-07 Киевский Филиал Всесоюзного Научно-Исс-Ледовательского Института По Монтажнымспециальным Работам Захват дл швеллеров
US4371203A (en) * 1981-07-13 1983-02-01 Munro Donald C Universal beam clamp
JPH092777A (ja) * 1995-06-21 1997-01-07 Hitoshi Hayashi 吊上げ用フック装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU852763A2 (ru) * 1979-08-06 1981-08-07 Киевский Филиал Всесоюзного Научно-Исс-Ледовательского Института По Монтажнымспециальным Работам Захват дл швеллеров
US4371203A (en) * 1981-07-13 1983-02-01 Munro Donald C Universal beam clamp
JPH092777A (ja) * 1995-06-21 1997-01-07 Hitoshi Hayashi 吊上げ用フック装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 1981, Derwent World Patents Index; AN 1984-054214 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101549836B (zh) * 2009-05-12 2012-05-02 中国一冶集团有限公司 封闭厂房内吊装超高超重设备的方法和专用吊具
CN113148169A (zh) * 2021-04-30 2021-07-23 中航电测仪器股份有限公司 一种直升机载荷传递及防偏摆结构和直升机

Also Published As

Publication number Publication date
BRPI0707975A2 (pt) 2011-05-17

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