EP0379848B1 - Arrangement in chain stoppers - Google Patents

Arrangement in chain stoppers Download PDF

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Publication number
EP0379848B1
EP0379848B1 EP89850023A EP89850023A EP0379848B1 EP 0379848 B1 EP0379848 B1 EP 0379848B1 EP 89850023 A EP89850023 A EP 89850023A EP 89850023 A EP89850023 A EP 89850023A EP 0379848 B1 EP0379848 B1 EP 0379848B1
Authority
EP
European Patent Office
Prior art keywords
chain
anchor
tightening means
arrangement
hydraulic ram
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.)
Expired
Application number
EP89850023A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0379848A1 (en
Inventor
Harry Egon Martensson
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.)
Kockums Marine AB
Original Assignee
Kockums Marine AB
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 Kockums Marine AB filed Critical Kockums Marine AB
Priority to EP89850023A priority Critical patent/EP0379848B1/en
Priority to ES198989850023T priority patent/ES2037476T3/es
Priority to DE8989850023T priority patent/DE68903827T2/de
Priority to KR1019900000756A priority patent/KR970010902B1/ko
Priority to JP2013758A priority patent/JPH02279488A/ja
Publication of EP0379848A1 publication Critical patent/EP0379848A1/en
Application granted granted Critical
Publication of EP0379848B1 publication Critical patent/EP0379848B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • B63B21/18—Stoppers for anchor chains

Definitions

  • the present invention relates to an arrangement in chain stoppers for tightening the anchor chain in order to keep the anchor in close fit-up against an abutment when the anchor is in its stowed position.
  • Chain stoppers are used onboard ships for locking the anchor chain when the anchor has been lowered, and thus for relieving the anchor windlass when the ship is at anchor.
  • Chain stoppers commonly used include an open slideway supporting the horizontal links of the chain in parallel with the slideway and providing a guide groove for the vertical links of the chain.
  • a previously known chain stopper of this kind is described in Brittish patent No 1 592 884.
  • locking of the anchor chain is obtained by means of lock bodies which can be moved to and from locking engagement with a horizontal chain link.
  • the locking action is obtained e g by means of a stirdy bar which can be lowered transversally of the anchor chain for locking a vertical chain link against an abutment.
  • FR-A-2 388 714 discloses a chain stopper device comprising a locking member which is moveable between a locking position in abutment with a chain link and a release position out of contact with the chain.
  • the locking member is connected to a linkage which by means of extendable and retractable means may be swung between self-locking position and release position.
  • DE-A-299 911 discloses a chain stopper for anchor chains Comprising a locking member which may be moved between a locking position in abutment with a chain link and a release position out of contact with the chain.
  • One object of the present invention is to provide an arrangement in chain stoppers of the kind mentioned initially including means for excerting a tightening action on the anchor chain when the anchor is in its stowed position, and which may be rapidly and easily disengaged from tightening engagement with the chain when anchoring shall be carried out.
  • Another object of the invention is to provide an arrangement of the kind mentioned which during normal conditions may be remotely controlled from the bridge of the ship.
  • Still another object of the invention is to provide an arrangement in which the means for tightening the anchor automatically are brought into inoperative position when anchoring shall take place.
  • Fig 1 is a schematical side view of an arrangement according to the invention.
  • Fig 2 is a plan view of the arrangement in fig 1.
  • Fig 3 is an enlarged side view of the chain tightening means in operative postion and in inoperative position.
  • Fig 4 is a partial sectional view taken as indicated at I-I in fig 3.
  • the arrangement according to the invention includes a chain stopper generally designated 1, of the kind known e g from Brittish patent 1 592 884.
  • This chain stopper includes a rigid frame 2 mounted on the ship's deck by welding and including an open slideway 3 supporting the horizontal links 5 of the anchor chain. Said slideway is further provided with a guide groove 4 for the vertical links 6 of said anchor chain.
  • the chain stopper is provided with two lock bodies 7 which by means of hydraulically operated cylinder-piston means 8 may be swung from inoperative positions on opposite sides of the slideway 3 into locking engagement with a horizontal link 5 supported on the slideway.
  • a supporting structure 9 which protrudes above the slideway 3 of the chain stopper and at the upper end thereof pivotably supports extendable and retractable pressure medium operated chain tightening means 10, which may be swung between an inoperative position I above said slideway 3 and guiding groove 4, as indicated by dash-and-dot lines in figures 1 and 3, and an operative position II in power actuating contact with a vertical chain link in the guiding groove 4 of said slideway 3.
  • the supporting structure 9 includes two side walls 11 disposed in parallel with and opposite each other on opposite sides of said slideway 3. At the upper ends said side walls 11 are interconnected transversally by means of a rigid cover plate 12.
  • the chain tightening means 10 include a double acting hydraulic ram 13 mounted in a cradle-like structure 14, which in turn is pivotably supported between the side walls 11 of said supporting structure 9 for swinging movement about a horizontal axis.
  • Said cradle-like structure 14 comprises a cylindrical portion 15 and a bottom portion 16, said cylindrical portion being open at the upper end and is provided at this end with an annular flange 17.
  • the cylindrical portion 15 is provided with diametrically opposite transversally extending shafts 18, which are journalled in bearings in the opposite side walls 11 of said supporting structure 9, so that the cradle like structure may be pivoted with respect to the supporting structure about the axis of shafts 18.
  • the cylinder 19 of the hydraulic ram 13 is provided with a flange 20 disposed at the piston end thereof.
  • the hydraulic ram 13 is attached to the flange 17 of the cradle-like structure by means of screws or bolts 21.
  • the end of the piston rod 22 of the hydraulic ram 13 is provided with an internal thread 23 for axially attaching an extension rod 24 which is provided with a corresponding thread at the end.
  • This extension rod thus forms an extension of the piston rod 22 through the bottom 16 of the cradle-like structure 14.
  • the length of said extension rod is such that the end thereof may be brought into contact with a standing chain link 6 in the guide groove 4 when tightening of the anchor chain shall be effected.
  • said extension rod 24 is provided with a yoke-like member 25, the internal surface of which being formed so as to substantially correspond to the form of the contact surface with the chain link 6.
  • the rod extension 24 is provided with two guide rods 26, rigidly clamped on said rod extension 24 and extending transversally in diametrically opposite directions in a substantially horizontal plane.
  • the free ends of the guide rods 26 extend into guide grooves 27 provided in each of the side plates 11 of the supporting structure for guiding said guide rods 26 therein when the hydraulic ram 13 is being extended or retracted.
  • each of said guide grooves 27 comprises an upper curved part, the upper end of which being positioned in line with the position taken by the guide rods 26 when said hydraulic ram 13 is in its inoperative position.
  • the curvature of this upper part of each guide groove is formed such that a tangent of said guide groove forms an obtuse angle with the centre line of the hydraulic ram 13. Due to cooperation between the guide rods 26 and said curved part of the guide grooves 27, the hydraulic ram 13 is caused to swing in direction downwards when said hydraulic ram 13 is being extended.
  • said extension rod 24 is provided with an annular flange 28, the outer diameter of which being slinghtly less than the inner diameter of the cylinder 15.
  • a compression spring 29 Disposed between said flange 28 and the bottom 16 of the cylinder 15 is a compression spring 29 constantly excerting a retracting force on the hydraulic ram 13. In a condition in which free flow of oil to and from the hydraulic ram 13 is permitted, said compression spring 29 automatically causes the hydraulic ram to swing in a direction upwards into inoperative position.
  • the double-acting hydraulic ram 13 as well as the cylinder-piston means 8 are supplied with hydraulic pressure medium from a hydraulic power plant, not shown in the figures.
  • the hydraulic ram 13 as well as the cylinder-piston means are connected to the hydraulic system by means of flexible hoses 30, 31 and 32, 33 respectively.
  • Said power plant including hydraulic pump unit, oil tank, oil filters, valves etc, preferably is disposed underneath the deck on which the anchor windlass and chain stoppers are mounted.
  • the control valves for controlling the supply of hydraulic pressure medium to and from the double-acting ram 13 and to the cylinder-piston means 8 are preferably electrically controlled, which allows for remote control from the bridge of the operation.
  • An electrically controlled four-way valve thus controls the supply of hydraulic pressure medium to and from the double-acting hydraulic ram 13.
  • the line supplying pressure medium to the chamber above the piston in the cylinder 19 of the hydraulic ram 13 is also connected to a pneumatic/hydraulic pressure accumulator, thus ensuring supply of hydraulic pressure medium to the hydraulic ram 13 for constantly urging the piston rod 23 and the rod extension 28 into power actuated engagement with a chain link, thus keeping the anchor chain tightened when the anchor is in its stowed position.
  • the supply of pressure medium to the hydraulic ram 13 from the pump is shut off, and the hydraulic pressure acting on the piston of the hydraulic ram 13 then is supplied from the pneumatic/hydraulic pressure accumulator.
  • Said accumulator is provided with a pressure governor which is electrically connected with control means on the bridge and may be surveyed at the bridge. If the pressure in the accumulator should fall below a predetermined minimum level, the hydraulic pump unit is started in order to recharge the accumulator.
  • the sequence of the anchoring operation is as follows.
  • the anchor windlass is started as well as the hydraulic pump unit for the chain tinghtener 10 and for operating the lock bodies 7 of the chain stopper.
  • the anchor windlass is actuated to excert traction in the anchor chain, and the pressure on the anchor chain tightener 10 is released, resulting in that said anchor chain tightener automatically is retracted, at the same time automatically being brought into the inoperative position thus leaving the passage of the anchor chain free so that the anchor may be lowered.
  • the anchor windlass By means of the anchor windlass the anchor is then lowered the desired distance.
  • the lowering of the anchor is then stopped and the lock bodies 7 of the chain stopper are brought into locking position whith the anchor chain.
  • the brake of the anchor windlass is then actuated and the operation terminates in that the hydraulic pump units are shut off.
  • the procedure is as follows.
  • the anchor windlass and the hydraulic pump units are started.
  • the brake of the anchor windlass is released.
  • the anchor is hawled in so that the lock bodies 7 of the chain stopper may be moved into inoperative position.
  • the anchor hawling operation is continued until the anchor abuts the shell plating. Then the brake of the anchor windlass is actuated.
  • the control valve of the anchor chain tightener 10 is then adjusted into a position in which hydraulic pressure medium is supplied to the hydraulic ram, which then extends and automatically is swung into engagement with a standing chain link 6 in the guide groove 4 of the slideway, thus excerting a tightening action on the anchor chain so that the anchor is brought into close fit-up against an abutment, e g the shell plating.
  • the hydraulic pump units are then shut off and the hydraulic pressure in the hydraulic ram is secured by means of the pneumatic/hydraulic pressure accumulator.
  • the anchor chain tightener 10 thus constantly excerts a tightening action on the anchor chain so that the anchor is kept in close fit-up with the shell plating.
  • Anchoring may also be effected manually in case the supply of electric current has been broken (black out).
  • This manual procedure is as follows.
  • the hydraulic pressure acting on the hydraulic ram 14 is released by manually adjusting a valve.
  • the achor chain tightener then automatically moves to its inoperative postition under the influence of the force of the compression spring 29.
  • the anchor may then be lowered by manually releasing the brake of the anchor windlass.
  • the brake of the anchor windlass is actuated manually and then the lock bodies 7 of the chain stopper are manually brought into locking engagement with the anchor chain.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
EP89850023A 1989-01-26 1989-01-26 Arrangement in chain stoppers Expired EP0379848B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP89850023A EP0379848B1 (en) 1989-01-26 1989-01-26 Arrangement in chain stoppers
ES198989850023T ES2037476T3 (es) 1989-01-26 1989-01-26 Dispositivo en estopores de cadena.
DE8989850023T DE68903827T2 (de) 1989-01-26 1989-01-26 Vorrichtung in kettenstoppern.
KR1019900000756A KR970010902B1 (ko) 1989-01-26 1990-01-23 체인 스토퍼 장치
JP2013758A JPH02279488A (ja) 1989-01-26 1990-01-25 チェーンストッパ装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89850023A EP0379848B1 (en) 1989-01-26 1989-01-26 Arrangement in chain stoppers

Publications (2)

Publication Number Publication Date
EP0379848A1 EP0379848A1 (en) 1990-08-01
EP0379848B1 true EP0379848B1 (en) 1992-12-09

Family

ID=8203257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89850023A Expired EP0379848B1 (en) 1989-01-26 1989-01-26 Arrangement in chain stoppers

Country Status (5)

Country Link
EP (1) EP0379848B1 (es)
JP (1) JPH02279488A (es)
KR (1) KR970010902B1 (es)
DE (1) DE68903827T2 (es)
ES (1) ES2037476T3 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109965983A (zh) * 2019-05-14 2019-07-05 吴兆锋 一种用于耳鼻喉科临床的便于调整型检测装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO333043B1 (no) * 2010-02-19 2013-02-18 Aker Pusnes As Anordning ved kjettingstopper
KR102109163B1 (ko) * 2013-11-19 2020-05-13 대우조선해양 주식회사 벨마우스의 앵커 고정용 유압식 체인 컴프레서 기구
CN105539733A (zh) * 2015-12-21 2016-05-04 大连中远船务工程有限公司 非标浅槽闸刀掣链器
CN112550557A (zh) * 2020-12-09 2021-03-26 南京中船绿洲机器有限公司 一种船用锚泊掣链器
CN113562117B (zh) * 2021-09-06 2022-10-14 山东海运股份有限公司 一种船舶用锚链减速装置及组合式掣链器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE299911C (es) *
US3361035A (en) * 1965-10-24 1968-01-02 J.L. Hunter Rountree Anchor chain retracting device
NO139775C (no) * 1977-04-28 1979-06-06 Pusnes Mek Verksted Anordning ved kjettingstopper.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109965983A (zh) * 2019-05-14 2019-07-05 吴兆锋 一种用于耳鼻喉科临床的便于调整型检测装置

Also Published As

Publication number Publication date
DE68903827D1 (de) 1993-01-21
KR970010902B1 (ko) 1997-07-02
KR900011645A (ko) 1990-08-01
DE68903827T2 (de) 1993-04-08
JPH02279488A (ja) 1990-11-15
EP0379848A1 (en) 1990-08-01
ES2037476T3 (es) 1993-06-16

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