EP0132013A1 - Bilge shore for shoring a ship in a dock - Google Patents
Bilge shore for shoring a ship in a dock Download PDFInfo
- Publication number
- EP0132013A1 EP0132013A1 EP84201052A EP84201052A EP0132013A1 EP 0132013 A1 EP0132013 A1 EP 0132013A1 EP 84201052 A EP84201052 A EP 84201052A EP 84201052 A EP84201052 A EP 84201052A EP 0132013 A1 EP0132013 A1 EP 0132013A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bilge
- ship
- shores
- shore
- keel blocks
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C5/00—Equipment usable both on slipways and in dry docks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C5/00—Equipment usable both on slipways and in dry docks
- B63C5/02—Stagings; Scaffolding; Shores or struts
- B63C5/04—Bilge or keel blocks
Definitions
- the invention concerns a method and an apparatus for shoring a ship in a dock which for that purpose is provided on the dock bottom with keel blocks having on either side thereof bilge shores adjustable in height.
- These conventional bilge shores comprise in general a substructure placed on the dock bottom, a movable superstructure and a height adjustment device connecting the superstructure to the substructure, while said height adjustment device ensures that the superstructure is pressed against the underside of the ship.
- This height adjustment device is substantially a mechanically-pneumatically, hydraulically or electrically operating device, whether or not remote-controlled.
- this ship For docking a ship, this ship is positioned above the keel blocks arranged in longitudinal direction, and in the centre of the dock, after which the water is pumped out of the dock or in case of a floating dock the dock is lifted.
- the superstructures of the bilge shores arranged on either side of the keel blocks are brought against the bottom of the ship by means of the height adjustment device. Possibly, the bilge shores may be previously set at the proper height.
- the height adjustment devices being under water pressure for the remote-controlled bilge shores, may refuse uncontrollably or become unreliable in operation, as a result of which for instance one or more bilge shores are adjusted too high or too low, which may cause substantial damage to the ship.
- the height adjustment device comprises a resilient construction provided between the superstructure and the substructure and a biasing member for biasing the resilient construction.
- the resilient construction comprises a resilient material, e.g. in the form of springs or a so-called rubber fender.
- the ship to be docked during the pumping out or during the lifting of the dock will first touch the bilge shores and subsequently bed down on the keel blocks. During this procedure first the resilient bilge shores are compressed until the weight of the ship is taken up by the keel blocks.
- the ship When during docking, e.g. by pumping over ballast from starboard to port, the weight distribution of the ship is changed, the ship will further compress the resilient bilge shores placed on port side due to the larger weight on port side. This compression causes on port side a larger and on starboard side a smaller counter-pressure of the resilient bilge shores, so that a new equilibrium condition is produced.
- a stop element for the superstructure the compression is blocked at a maximum permissible magnitude, so as to prevent the ship from heeling over in an unacceptable manner in case a change in weight takes place that is larger than the maximum spring pressure.
- the compressible bilge shores 3 are designed in such a manner that, after having being compressed along the distance d, they provide a sufficient spring pressure for maintaining the ship in equilibrium relative to the keel blocks. This spring pressure is normally so large that the bilge shores are capable of also resisting within certain limits a rolling S (Fig. 2) of the ship relatively to its longitudinal axis, as a result of e.g. a displacement of a weight from starboard to port and vice versa.
- a bilge shore 3 comprising a substructure 5 to be placed on a dock bottom, a movable superstructure 6 in the form of e.g. a beam which is adapted to rest against the underside of a ship, and a resilient construction 7 in the form of springs connecting the superstructure to the substructure in order to move the superstructure up and down substantially in the vertical plane relatively to the substructure.
- a movable superstructure 6 in the form of e.g. a beam which is adapted to rest against the underside of a ship
- a resilient construction 7 in the form of springs connecting the superstructure to the substructure in order to move the superstructure up and down substantially in the vertical plane relatively to the substructure.
- a biasing device comprising a plurality of vertical supporting beams 8 the one ends of which are attached to the substructure 5, while the other ends thereof are provided with a vertical guide slot 9 extending in axial direction of the supporting beam, through which slot extends the one end of a horizontally positioned cam 10 which is attached with its other end to the upper beam 6.
- the top end of the guide slot 9 defines the extent of the bias in the springs 7.
- the bias can be made adjustable by e.g. mounting the vertical supporting beams 8 slidable in vertical direction on the substructure 5.
- the top of the beam 6 is provided with a layer of flexible material 11, e.g. rubber.
- This beam 6 can also be placed at an angle relative to the horizontal in order to support flat ships and ships having a rise of floor, as diagrammatically shown in Fig. 4 and Fig. 5, respectively.
- the resilient construction is capable of resisting rollings S within certain limits.
- the bilge shore is provided with a stop 12 on which the top beam 6 comes to rest after the maximum permissible compression has been reached. It is clear that the length of the guide slot 9 is such that this extendsto beyond the stop 12.
- Fig. 6 shows a second embodiment of a bilge shore 3, provided with a substructure 13 in the form of a block, e.g. a block of concrete, a box-shaped superstructure 14 which is telescopically slidable relatively to the block 13, and a resilient construction 15 in the form of a e.g. a rubber fender or a different resilient element or cushion which is mounted in the box-shaped superstructure and rests on the block 13.
- a substructure 13 in the form of a block, e.g. a block of concrete
- a box-shaped superstructure 14 which is telescopically slidable relatively to the block 13
- a resilient construction 15 in the form of a e.g. a rubber fender or a different resilient element or cushion which is mounted in the box-shaped superstructure and rests on the block 13.
- the block 13 For adjusting a bias in the rubber fender 15, the block 13 comprises a slotted hole 16 through which extends a pin 17 coupled to the box-shaped structure 14. The place of the slotted hole is decisive for the bias in the cushion 15.
- the compression can be limited to a maximum permissible compression value.
- the bilge shore shown in Fig. 7 is substantially identical to the embodiment shown in Fig. 3, on the understanding that this employs as biasing device a chain 22 coupled between the substructure 20 and the superstructure 21 for biasing the springs 23. Furthermore, a stop 24 is present for limiting the compression of the superstructure 21. Likewise for preventing damage to the underside of a ship to be docked, a layer of flexible material 25 is applied to the superstructure 21.
- the resilient construction in such a manner that the spring graph, at a given compression, obtains rather suddenly a higher value.
- the stops 12, 18 and 24 are not necessary.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Bridges Or Land Bridges (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
- The invention concerns a method and an apparatus for shoring a ship in a dock which for that purpose is provided on the dock bottom with keel blocks having on either side thereof bilge shores adjustable in height. These conventional bilge shores comprise in general a substructure placed on the dock bottom,a movable superstructure and a height adjustment device connecting the superstructure to the substructure, while said height adjustment device ensures that the superstructure is pressed against the underside of the ship. This height adjustment device is substantially a mechanically-pneumatically, hydraulically or electrically operating device, whether or not remote-controlled.
- For docking a ship, this ship is positioned above the keel blocks arranged in longitudinal direction, and in the centre of the dock, after which the water is pumped out of the dock or in case of a floating dock the dock is lifted.
- The ship now beds down on the keel blocks which, according as the water level relatively to the ship becomes lower, are increasingly loaded by the weight of the ship.
- When all keel blocks support sufficiently, the superstructures of the bilge shores arranged on either side of the keel blocks are brought against the bottom of the ship by means of the height adjustment device. Possibly, the bilge shores may be previously set at the proper height.
- However, various drawbacks go with the use of these prior art bilge shores. For instance, the height adjustment devices being under water pressure for the remote-controlled bilge shores, may refuse uncontrollably or become unreliable in operation, as a result of which for instance one or more bilge shores are adjusted too high or too low, which may cause substantial damage to the ship.
- In case of non-remote-controlled bilge shores, the dock has practically always to be pumped out between times in order to set said bilge shores at the proper height. This is very time-consuming and expensive.
- It is an object of the invention to provide a specifically resilient bilge shore which lacksthe above drawbacks, to which effect according to the invention the height adjustment device comprises a resilient construction provided between the superstructure and the substructure and a biasing member for biasing the resilient construction. In particular, the resilient construction comprises a resilient material, e.g. in the form of springs or a so-called rubber fender. Such a resilient construction has the advantage that no remote control is necessary any longer. Moreover, the superstructure is very simple and the chance of an incorrect operation is substantially excluded.
- When further ensuring that the bilge shores according to the invention in unloaded condition are higher than the keel blocks, i.e. no ship rests on the bilge shores yet,the ship to be docked during the pumping out or during the lifting of the dock, will first touch the bilge shores and subsequently bed down on the keel blocks. During this procedure first the resilient bilge shores are compressed until the weight of the ship is taken up by the keel blocks.
- According to the invention it is of relevance as a matter of fact that first the bilge shores are compressed in order to provide a certain amount of spring pressure at a given compression of the resilient
- construction, in order to maintain the equilibrium of the ship after it rests on the keel blocks relatively to its longitudinal axis. This feature fixes the minimum height of compressed bilge shores, so that also the maximum height of the bilge shores with unloaded resilient construction is fixed, i.e. is considerably higher than the height of the keel blocks. By now applying a bias to the resilient construction, the height of the bilge shore is restricted, while the required maximum spring pressure in compressed state of the bilge shores is not altered. This result has the advantage that a ship of larger draft can be docked, for the height of the bilge shores is a measure for the admissible draft during the docking. By using a resilient construction in the form of e.g. a simple spring, the bilge shore according to the application will be operating substantially without failure and hence will not cause damage, in contrast to the prior art bilge shores.
- When during docking, e.g. by pumping over ballast from starboard to port, the weight distribution of the ship is changed, the ship will further compress the resilient bilge shores placed on port side due to the larger weight on port side. This compression causes on port side a larger and on starboard side a smaller counter-pressure of the resilient bilge shores, so that a new equilibrium condition is produced. By providing according to the invention a stop element for the superstructure, the compression is blocked at a maximum permissible magnitude, so as to prevent the ship from heeling over in an unacceptable manner in case a change in weight takes place that is larger than the maximum spring pressure.
- Some embodiments of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
- Fig. 1 shows an arrangement in a dock of the resilient bilge shores arranged on either side of the keel blocks, while in the rest position the superstructure of the bilge shores project above the keel blocks;
- Fig. 2 shows a ship resting on the bilge shores and keel blocks, which ship may roll within given limits by the resilient bilge shores;
- Fig. 3 is a diagrammatic view of a first embodiment of a bilge shore;
- Figs. 4 and 5 are diagrammatic views of a bilge shore the top surface of the superstructure of which rests against the underside of a flat ship, a ship with rise of floor, respectively;
- Fig. 6 shows a second embodiment of a bilge shore;
- Fig. 7 shows a third embodiment of a bilge shore.
- Fig. 1 shows a diagrammatic arrangement of a
dock 1 on the bottom of which there are arrangedkeel blocks 2 with on either side thereofcompressible bilge shores 3. The bilge shores are designed in such a manner that they project above the keel blocks in initial position along e.g. a distance d. - When, after the docking of the ship 4,the dock is pumped out or in case of a floating dock, the dock is lifted, the bottom of the ship will first come to rest on the bilge shores, which subsequently are c=pressed to such extent until the ship comes to rest on the keel blocks. The
compressible bilge shores 3 are designed in such a manner that, after having being compressed along the distance d, they provide a sufficient spring pressure for maintaining the ship in equilibrium relative to the keel blocks. This spring pressure is normally so large that the bilge shores are capable of also resisting within certain limits a rolling S (Fig. 2) of the ship relatively to its longitudinal axis, as a result of e.g. a displacement of a weight from starboard to port and vice versa. - Three embodiments of a bilge shore will now be described in more detail, with reference to Figs. 3-7.
- The embodiment indicated in Fig. 3 shows a
bilge shore 3 comprising asubstructure 5 to be placed on a dock bottom, a movable superstructure 6 in the form of e.g. a beam which is adapted to rest against the underside of a ship, and a resilient construction 7 in the form of springs connecting the superstructure to the substructure in order to move the superstructure up and down substantially in the vertical plane relatively to the substructure. - For limiting the height of said bilge shore and to ensure that the spring pressure provides a sufficient counter-pressure along a relatively short compression distance d, see Fig. 1, there is provided a biasing device comprising a plurality of vertical supporting
beams 8 the one ends of which are attached to thesubstructure 5, while the other ends thereof are provided with avertical guide slot 9 extending in axial direction of the supporting beam, through which slot extends the one end of a horizontally positionedcam 10 which is attached with its other end to the upper beam 6. The top end of theguide slot 9 defines the extent of the bias in the springs 7. The bias can be made adjustable by e.g. mounting the vertical supportingbeams 8 slidable in vertical direction on thesubstructure 5. - In order to minimize the damage to a ship to be docked, the top of the beam 6 is provided with a layer of
flexible material 11, e.g. rubber. This beam 6 can also be placed at an angle relative to the horizontal in order to support flat ships and ships having a rise of floor, as diagrammatically shown in Fig. 4 and Fig. 5, respectively. - As already indicated in the above, the resilient construction is capable of resisting rollings S within certain limits. To prevent the ship from exerting an excessive pressure on the springs 7, due to an excessive list of the ship, the bilge shore is provided with a
stop 12 on which the top beam 6 comes to rest after the maximum permissible compression has been reached. It is clear that the length of theguide slot 9 is such that this extendsto beyond thestop 12. - Fig. 6 shows a second embodiment of a
bilge shore 3, provided with asubstructure 13 in the form of a block, e.g. a block of concrete, a box-shaped superstructure 14 which is telescopically slidable relatively to theblock 13, and aresilient construction 15 in the form of a e.g. a rubber fender or a different resilient element or cushion which is mounted in the box-shaped superstructure and rests on theblock 13. - For adjusting a bias in the
rubber fender 15, theblock 13 comprises a slottedhole 16 through which extends apin 17 coupled to the box-shaped structure 14. The place of the slotted hole is decisive for the bias in thecushion 15. By providing astop pin 18 in theblock 13, the compression can be limited to a maximum permissible compression value. - On the box-
shaped structure 14 there are provided a plurality of rubber strips 19 for protecting the underside of a ship to be docked. - The bilge shore shown in Fig. 7 is substantially identical to the embodiment shown in Fig. 3, on the understanding that this employs as biasing device a chain 22 coupled between the
substructure 20 and thesuperstructure 21 for biasing the springs 23. Furthermore, astop 24 is present for limiting the compression of thesuperstructure 21. Likewise for preventing damage to the underside of a ship to be docked, a layer offlexible material 25 is applied to thesuperstructure 21. - Various alterations can be made without departing from the scope of the invention.
- For instance, it is possible to construct the resilient construction in such a manner that the spring graph, at a given compression, obtains rather suddenly a higher value. In this case, the
stops
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8302535 | 1983-07-14 | ||
NL8302535 | 1983-07-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0132013A1 true EP0132013A1 (en) | 1985-01-23 |
EP0132013B1 EP0132013B1 (en) | 1986-11-26 |
Family
ID=19842166
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84201052A Expired EP0132013B1 (en) | 1983-07-14 | 1984-07-12 | Bilge shore for shoring a ship in a dock |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0132013B1 (en) |
JP (1) | JPS6038281A (en) |
KR (1) | KR940009264B1 (en) |
DE (1) | DE3461443D1 (en) |
IN (1) | IN161244B (en) |
SG (1) | SG77887G (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2335167A (en) * | 1998-01-13 | 1999-09-15 | Babtie Group Limited | Docking system for marine vessels |
CN115158605A (en) * | 2022-08-18 | 2022-10-11 | 上海外高桥造船有限公司 | Dock block assembly and support structure of inclined bottom ship |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03293492A (en) * | 1990-04-10 | 1991-12-25 | Kajima Corp | Basement trunk room |
KR100722546B1 (en) * | 2005-10-26 | 2007-05-28 | 조영식 | dry dock |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE472896C (en) * | 1929-03-07 | Paul Matthiessen | Elastic support for seaplanes | |
US2390300A (en) * | 1943-05-20 | 1945-12-04 | Frederic R Harris | Shock-absorbing floating dry dock |
GB838073A (en) * | 1956-07-24 | 1960-06-22 | John Blain Hunt | Improvements in or relating to apparatus for the dry docking of ships |
US3721096A (en) * | 1970-08-26 | 1973-03-20 | Ass Ideas Int Inc | Soft support system for hulls and the like |
FR2350246A1 (en) * | 1976-05-05 | 1977-12-02 | Amco | Dry dock hydraulic hull supporting system - has armoured flexible tubes between hull and support with air release and hydraulic connections |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49129299U (en) * | 1973-03-06 | 1974-11-06 | ||
JPS49133400U (en) * | 1973-03-15 | 1974-11-15 |
-
1984
- 1984-07-10 IN IN497/CAL/83A patent/IN161244B/en unknown
- 1984-07-12 EP EP84201052A patent/EP0132013B1/en not_active Expired
- 1984-07-12 DE DE8484201052T patent/DE3461443D1/en not_active Expired
- 1984-07-13 KR KR1019840004107A patent/KR940009264B1/en not_active IP Right Cessation
- 1984-07-14 JP JP59146703A patent/JPS6038281A/en active Granted
-
1987
- 1987-09-23 SG SG778/87A patent/SG77887G/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE472896C (en) * | 1929-03-07 | Paul Matthiessen | Elastic support for seaplanes | |
US2390300A (en) * | 1943-05-20 | 1945-12-04 | Frederic R Harris | Shock-absorbing floating dry dock |
GB838073A (en) * | 1956-07-24 | 1960-06-22 | John Blain Hunt | Improvements in or relating to apparatus for the dry docking of ships |
US3721096A (en) * | 1970-08-26 | 1973-03-20 | Ass Ideas Int Inc | Soft support system for hulls and the like |
FR2350246A1 (en) * | 1976-05-05 | 1977-12-02 | Amco | Dry dock hydraulic hull supporting system - has armoured flexible tubes between hull and support with air release and hydraulic connections |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2335167A (en) * | 1998-01-13 | 1999-09-15 | Babtie Group Limited | Docking system for marine vessels |
GB2335167B (en) * | 1998-01-13 | 2001-06-06 | Babtie Group Ltd | Docking system for marine vessels |
CN115158605A (en) * | 2022-08-18 | 2022-10-11 | 上海外高桥造船有限公司 | Dock block assembly and support structure of inclined bottom ship |
Also Published As
Publication number | Publication date |
---|---|
SG77887G (en) | 1988-04-15 |
DE3461443D1 (en) | 1987-01-15 |
IN161244B (en) | 1987-10-31 |
EP0132013B1 (en) | 1986-11-26 |
JPH0358956B2 (en) | 1991-09-09 |
JPS6038281A (en) | 1985-02-27 |
KR850001095A (en) | 1985-03-14 |
KR940009264B1 (en) | 1994-10-06 |
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