EP2184406A1 - Suction dredger - Google Patents
Suction dredger Download PDFInfo
- Publication number
- EP2184406A1 EP2184406A1 EP08168528A EP08168528A EP2184406A1 EP 2184406 A1 EP2184406 A1 EP 2184406A1 EP 08168528 A EP08168528 A EP 08168528A EP 08168528 A EP08168528 A EP 08168528A EP 2184406 A1 EP2184406 A1 EP 2184406A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- belt
- crane
- hold
- suction dredger
- load
- 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- Withdrawn
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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
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F7/00—Equipment for conveying or separating excavated material
- E02F7/02—Conveying equipment mounted on a dredger
- E02F7/023—Conveying equipment mounted on a dredger mounted on a floating dredger
Definitions
- the invention concerns a suction dredger in accordance with the preamble of claim 1.
- the vertically hoisted bucket is unloaded onto a crane belt by moving the crane belt sideways to a position under the bucket and after the load is deposited on the crane belt the crane belt is moved sideways to allow the bucket to pass downwards for collecting a new load.
- the disadvantage of the known design is that the sideways movement of the crane belt causes an interrupted flow or an additional bump of the load on the unloading belt, which is undesirable.
- the crane and the crane belt are stationary relative to the unloading belt and the bucket moves sideways to a position above the crane belt. This leads to a complicated construction of the bucket movement.
- the suction dredger is according to claim 1. In this way, the crane and the crane belt remain more or less in the same position relative to the unloading belt so that there is a constant flow of load on the unloading belt and the bucket makes only vertical movements.
- the suction dredger is according to claim 2. In this way, the opening of the hatch also moves the load onto the crane belt.
- the suction dredger is according to claim 3. In this way, the crane supports the hatch in a simple and robust construction.
- the suction dredger is according to claim 4.
- the moving parts of the hatch can be half of the width of the opening and two crane belts transport the load to the unloading belt. This makes it possible to open the hatch quicker and so to increase the unloading capacity.
- the suction dredger is according to claim 5. In this way, the bucket can remain open when lowered through the opening so that it is ready to grab a new load.
- FIGS 1-5 show a suction dredger 19.
- the suction dredger 19 is a vessel with a bow 14 and a stern 21 with crew quarters 1 and a propulsion and steering system 20 and a hold 18 for holding sand, shingle or similar material sucked from the bottom of the sea.
- the suction dredger 19 has a suction pipe 6 that is coupled to the suction pipe gantry 7.
- the suction pipe 6 has a suction head 2 and a pump 5.
- the suction pipe 6 extends from the suction pipe gantry 7 into the sea at the side of the suction dredger 19 with the suction head 2 on the sea floor.
- the pump 5 pumps a mixture of water with sand, shingle or similar material into the hold 18. In the hold 18 the sand, shingle or similar material settles in as sediment in the hold 18 and excess water flows out of the hold 18.
- the suction dredger 19 ends the loading phase and the suction pipe 6 is brought inboard and the suction dredger 19 sails to an unloading station.
- the suction dredger 19 is moored alongside a quay or the bow 14 is brought near a location where a distribution belt 9 mounted on the bow 14 can deposit the sand, shingle or similar material.
- the suction dredger 19 can be unloaded while it is anchored and smaller vessels moor alongside.
- Rails 22 extend on both sides of the hold 18 and a crane 3 can travel over the rails 22 along the length of the hold 18.
- the crane 3 has a bucket 4, also known under the names of grab or clamshell.
- the bucket 4 has a width that is more or less equal to the width of the hold 18 and extends over the width of the hold 18. Cables 26 connect the bucket 4 with a cable drum 25, rotating the cable drum 25 results in hoisting and lowering the bucket 4.
- the bucket 4 has pistons 27 for opening and closing the bucket 4. After lowering the opened bucket 4 through an opening 36 into the hold 18 and setting it on the sediment deposited in the hold 18, the pistons 27 close the bucket 4 and the cable drum 25 hoists the bucket 4 upwards. After the bucket 4 is hoisted above hatches 29 through the opening 36 and the hatches 29 can rotate around the hinges 31, the hatches 29 rotate downwards by actuating the pistons 32 and close the opening 36 under the bucket 4.
- each hatch 29 forms an inclined surface, a slope, towards a crane belt 23.
- the crane belts 23 extend on both sides of the opening 36 perpendicular to the rails 22 through an opening 30 in the side of the crane 3 to above an unloading belt 24.
- a guide plate 33 prevents material to fall off from the crane belt 23.
- the crane belts 23 transport the sand, shingle or similar material to the unloading belt 24.
- pistons 32 move the hatches 29 upwards to the position as shown in figure 5 and the bucket 4 is lowered into the hold for the next cycle of fetching a batch of sand, shingle or similar material. It will be clear that in the course of unloading the hold 18 wheels 35 mounted in carriages 34 will move the crane 3 along the length of the suction dredger 19.
- the opening 36 is closed with one hatch 29 and there is one crane belt 23 transporting sand, shingle or similar material to the unloading belt 24.
- the hatches rotate around a hinge 31.
- the hatch 29 is coupled by linkage arms to the crane and can make a combined movement so that while rotating the hatch 29 moves sideways as well.
- the unloading belt 24 extends at one side of the suction dredger 19 along the length of the hold 18 to the bow 14 and ends above a receiving bin 28 of a transverse belt 8.
- the transverse belt 8 during unloading of the suction dredger 19 located more or less perpendicular to the longitudinal direction of the suction dredger 19, transports the sand, shingle or similar material to a receiving bin 16 of a lifting belt 10.
- the lifting belt 10 is located on the centerline of the suction dredger 19 and transports the sand, shingle or similar material to the receiving bin 11 of the distribution belt 9.
- a support cylinder 13 is located on the bow 14 of the suction dredger 19.
- the support cylinder 13 supports a turning hinge 12 that can rotate around a rotation axis 15.
- the distribution belt 9 is mounted in the turning hinge 12.
- the distribution belt 9 can rotate around the rotation axis 15, during unloading the suction dredger 19 the rotation of the distribution belt is limited in order to prevent colliding with the lifting belt 10.
- the distribution belt 9 has a considerable length, for instance more than the width of the suction dredger 19 or more than twice the width of the suction dredger 19, so that the distribution belt 9 can unload at a considerable length in front of the suction dredger 19.
- the design is such that the end of the distribution belt 9 can be near the side of the suction dredger 19 on either side of the ship as shown in figure 2 .
- the forward end of the lifting belt 10 is high above the distribution belt 9 so that it can partly swivel under the lifting belt 10.
- the receiving bin 28 of the transverse belt 8 is located as low as possible so that the forward end of the unloading belt 24 is low above the deck and the distribution belt 9 can swivel freely over the end of the unloading belt 9.
- the distribution belt 9 is shown at the port side with uninterrupted lines and the distribution belt 9" is shown at the starboard side with interrupted lines.
- the advantage of the unloading at both sides is that unloading can take place in vessels at both sides of the suction dredger 19 so that the unloading is more or less uninterrupted when unloading into one vessel at one side and thereafter in the next vessel at the other side.
- Figure 2 shows the maximum reach of the distribution belt 9 with the stripe-dot line, the distribution belt 9 can be tilted upwards so that obstacles within the reach can be avoided.
- the suction dredger 19 is prepared for the next sea voyage.
- the lifting belt 10 is lowered on deck, for instance by moving the backward end of the lifting belt 10 backwards while rotating the frame 17 backwards.
- the front end of the lifting belt so lowers towards the deck on which it is secured.
- the distribution belt 9 is rotated backwards and lowered and secured on the center of the suction dredger 19.
- the crane 3 is secured on deck near the crew quarters 1.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ship Loading And Unloading (AREA)
Abstract
The invention concerns a suction dredger (19) comprising a hold (18) for holding a load such as sand, shingle or similar material and a crane (3) for moving the load from the hold (18) onto an unloading belt (24) along the hold (18), wherein the crane (3) comprises a grab or clamshell (4) that can move along the length of the hold (18) and above a crane belt (23) and wherein the crane belt (23) transports the load unloaded from the grab or clamshell (4) to the unloading belt (24).
In accordance with the invention, the grab or clamshell (4) moves through an opening (36) with a hatch (29) located above the hold (18) and the crane belt (23) and wherein the closable hatch (29) comprises a sloped upper surface to guide the load unloaded from the grab or clamshell (4) to the crane belt (23).
In accordance with the invention, the grab or clamshell (4) moves through an opening (36) with a hatch (29) located above the hold (18) and the crane belt (23) and wherein the closable hatch (29) comprises a sloped upper surface to guide the load unloaded from the grab or clamshell (4) to the crane belt (23).
Description
- The invention concerns a suction dredger in accordance with the preamble of claim 1. In an embodiment of the suction dredger, the vertically hoisted bucket is unloaded onto a crane belt by moving the crane belt sideways to a position under the bucket and after the load is deposited on the crane belt the crane belt is moved sideways to allow the bucket to pass downwards for collecting a new load. The disadvantage of the known design is that the sideways movement of the crane belt causes an interrupted flow or an additional bump of the load on the unloading belt, which is undesirable. In another embodiment, the crane and the crane belt are stationary relative to the unloading belt and the bucket moves sideways to a position above the crane belt. This leads to a complicated construction of the bucket movement. To overcome these disadvantages the suction dredger is according to claim 1. In this way, the crane and the crane belt remain more or less in the same position relative to the unloading belt so that there is a constant flow of load on the unloading belt and the bucket makes only vertical movements.
- In accordance with an embodiment, the suction dredger is according to
claim 2. In this way, the opening of the hatch also moves the load onto the crane belt. - In accordance with an embodiment, the suction dredger is according to
claim 3. In this way, the crane supports the hatch in a simple and robust construction. - In accordance with an embodiment, the suction dredger is according to
claim 4. In this way, the moving parts of the hatch can be half of the width of the opening and two crane belts transport the load to the unloading belt. This makes it possible to open the hatch quicker and so to increase the unloading capacity. - In accordance with an embodiment, the suction dredger is according to
claim 5. In this way, the bucket can remain open when lowered through the opening so that it is ready to grab a new load. - Embodiments of the invention are described with the aid of the accompanying drawing in which
-
Figure 1 shows a side view of a suction dredger, -
Figure 2 shows a top view of the suction dredger offigure 1 , -
Figure 3 shows cross section III-III of the suction dredger offigure 1 , -
Figure 4 shows cross section IV-IV of the suction dredger offigure 1 , and -
Figure 5 shows a crane on the suction dredger offigure 1 in schematic cross section. -
Figures 1-5 show asuction dredger 19. Thesuction dredger 19 is a vessel with abow 14 and astern 21 with crew quarters 1 and a propulsion andsteering system 20 and ahold 18 for holding sand, shingle or similar material sucked from the bottom of the sea. Thesuction dredger 19 has asuction pipe 6 that is coupled to thesuction pipe gantry 7. Thesuction pipe 6 has asuction head 2 and apump 5. During use thesuction pipe 6 extends from thesuction pipe gantry 7 into the sea at the side of thesuction dredger 19 with thesuction head 2 on the sea floor. Thepump 5 pumps a mixture of water with sand, shingle or similar material into thehold 18. In thehold 18 the sand, shingle or similar material settles in as sediment in thehold 18 and excess water flows out of thehold 18. - After the
hold 18 is filled up with sand, shingle or similar material thesuction dredger 19 ends the loading phase and thesuction pipe 6 is brought inboard and thesuction dredger 19 sails to an unloading station. At the unloading station thesuction dredger 19 is moored alongside a quay or thebow 14 is brought near a location where adistribution belt 9 mounted on thebow 14 can deposit the sand, shingle or similar material. Also thesuction dredger 19 can be unloaded while it is anchored and smaller vessels moor alongside. -
Rails 22 extend on both sides of thehold 18 and acrane 3 can travel over therails 22 along the length of thehold 18. Thecrane 3 has abucket 4, also known under the names of grab or clamshell. Thebucket 4 has a width that is more or less equal to the width of thehold 18 and extends over the width of thehold 18.Cables 26 connect thebucket 4 with acable drum 25, rotating thecable drum 25 results in hoisting and lowering thebucket 4. Thebucket 4 haspistons 27 for opening and closing thebucket 4. After lowering the openedbucket 4 through an opening 36 into thehold 18 and setting it on the sediment deposited in thehold 18, thepistons 27 close thebucket 4 and thecable drum 25 hoists thebucket 4 upwards. After thebucket 4 is hoisted abovehatches 29 through the opening 36 and thehatches 29 can rotate around thehinges 31, thehatches 29 rotate downwards by actuating thepistons 32 and close the opening 36 under thebucket 4. - In closed position, as shown in interrupted lines in
figure 5 , eachhatch 29 forms an inclined surface, a slope, towards acrane belt 23. Thecrane belts 23 extend on both sides of the opening 36 perpendicular to therails 22 through an opening 30 in the side of thecrane 3 to above anunloading belt 24. At the side of thecrane belt 23 away from the hatch 29 aguide plate 33 prevents material to fall off from thecrane belt 23. After thebucket 4 above the closedhatches 29 is opened by actuating thepistons 27 the content of thebucket 4, sand, shingle or similar material, falls onto the closedhatches 29 and slides towards thecrane belt 23. - The
crane belts 23 transport the sand, shingle or similar material to theunloading belt 24. After thebucket 4 is unloaded,pistons 32 move thehatches 29 upwards to the position as shown infigure 5 and thebucket 4 is lowered into the hold for the next cycle of fetching a batch of sand, shingle or similar material. It will be clear that in the course of unloading thehold 18wheels 35 mounted incarriages 34 will move thecrane 3 along the length of thesuction dredger 19. - In the disclosed embodiment, there are two
hatches 29 and twocrane belts 23. In a further embodiment the opening 36 is closed with onehatch 29 and there is onecrane belt 23 transporting sand, shingle or similar material to theunloading belt 24. In the shown embodiment the hatches rotate around ahinge 31. In another embodiment thehatch 29 is coupled by linkage arms to the crane and can make a combined movement so that while rotating thehatch 29 moves sideways as well. - The
unloading belt 24 extends at one side of thesuction dredger 19 along the length of thehold 18 to thebow 14 and ends above areceiving bin 28 of atransverse belt 8. Thetransverse belt 8, during unloading of thesuction dredger 19 located more or less perpendicular to the longitudinal direction of thesuction dredger 19, transports the sand, shingle or similar material to a receivingbin 16 of alifting belt 10. Thelifting belt 10 is located on the centerline of thesuction dredger 19 and transports the sand, shingle or similar material to the receivingbin 11 of thedistribution belt 9. - A
support cylinder 13 is located on thebow 14 of thesuction dredger 19. Thesupport cylinder 13 supports aturning hinge 12 that can rotate around arotation axis 15. Thedistribution belt 9 is mounted in the turninghinge 12. Thedistribution belt 9 can rotate around therotation axis 15, during unloading thesuction dredger 19 the rotation of the distribution belt is limited in order to prevent colliding with thelifting belt 10. Thedistribution belt 9 has a considerable length, for instance more than the width of thesuction dredger 19 or more than twice the width of thesuction dredger 19, so that thedistribution belt 9 can unload at a considerable length in front of thesuction dredger 19. - By placing the
lifting belt 10 supported by aframe 17 in the centreline of thesuction dredger 19 the design is such that the end of thedistribution belt 9 can be near the side of thesuction dredger 19 on either side of the ship as shown infigure 2 . For this, the forward end of thelifting belt 10 is high above thedistribution belt 9 so that it can partly swivel under thelifting belt 10. Thereceiving bin 28 of thetransverse belt 8 is located as low as possible so that the forward end of theunloading belt 24 is low above the deck and thedistribution belt 9 can swivel freely over the end of theunloading belt 9. - In
figure 2 thedistribution belt 9 is shown at the port side with uninterrupted lines and thedistribution belt 9" is shown at the starboard side with interrupted lines. The advantage of the unloading at both sides is that unloading can take place in vessels at both sides of thesuction dredger 19 so that the unloading is more or less uninterrupted when unloading into one vessel at one side and thereafter in the next vessel at the other side.Figure 2 shows the maximum reach of thedistribution belt 9 with the stripe-dot line, thedistribution belt 9 can be tilted upwards so that obstacles within the reach can be avoided. - After the
hold 18 is emptied thesuction dredger 19 is prepared for the next sea voyage. For this the liftingbelt 10 is lowered on deck, for instance by moving the backward end of the liftingbelt 10 backwards while rotating theframe 17 backwards. The front end of the lifting belt so lowers towards the deck on which it is secured. Thedistribution belt 9 is rotated backwards and lowered and secured on the center of thesuction dredger 19. Thecrane 3 is secured on deck near the crew quarters 1.
Claims (5)
- Suction dredger comprising a hold (18) for holding a load such as sand, shingle or similar material and a crane (3) for moving the load from the hold onto an unloading belt (24) along the hold, wherein the crane comprises a grab or clamshell (4) that can move between the hold and above a crane belt (23) and wherein the crane belt transports the load unloaded from the grab or clamshell to the unloading belt characterized in that the grab or clamshell (4) moves through an opening (36) with a hatch (29) between the hold (18) and above the crane belt (23) and wherein the closed hatch comprises a sloped upper surface to guide the load unloaded from the grab or clamshell to the crane belt (23).
- Suction dredger in accordance with claim 1 wherein the hatch (29) opens by rotating with its lower side near the crane belt (23).
- Suction dredger in accordance with claim 1 or 2 wherein a hinge (31) connects the hatch (29) to the crane (3).
- Suction dredger in accordance with claim 1, 2 or 3 wherein the hatch (29) comprises two parts, one at each side of the opening (36), and each part guides the load to one crane belt (23).
- Suction dredger in accordance with claim 1, 2 or 3 wherein the hatch (29) comprises one part at the side of the opening (36) which guides the load to the crane belt (23).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08168528A EP2184406A1 (en) | 2008-11-06 | 2008-11-06 | Suction dredger |
PL09174957T PL2184405T3 (en) | 2008-11-06 | 2009-11-03 | Suction dredger |
EP09174957A EP2184405B1 (en) | 2008-11-06 | 2009-11-03 | Suction dredger |
DK09174957.2T DK2184405T3 (en) | 2008-11-06 | 2009-11-03 | dredger |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08168528A EP2184406A1 (en) | 2008-11-06 | 2008-11-06 | Suction dredger |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2184406A1 true EP2184406A1 (en) | 2010-05-12 |
Family
ID=40427853
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08168528A Withdrawn EP2184406A1 (en) | 2008-11-06 | 2008-11-06 | Suction dredger |
EP09174957A Not-in-force EP2184405B1 (en) | 2008-11-06 | 2009-11-03 | Suction dredger |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09174957A Not-in-force EP2184405B1 (en) | 2008-11-06 | 2009-11-03 | Suction dredger |
Country Status (3)
Country | Link |
---|---|
EP (2) | EP2184406A1 (en) |
DK (1) | DK2184405T3 (en) |
PL (1) | PL2184405T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108425398A (en) * | 2018-04-03 | 2018-08-21 | 广州市昊力工具有限公司 | A kind of dredging method |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2981956B1 (en) * | 2011-10-26 | 2013-11-22 | Eltrova | DEVICE FOR REMONTING SEDIMENTS LOCATED IN THE MARINE FUNDS |
CN113529840B (en) * | 2021-06-18 | 2022-07-08 | 郑州大学 | Dredging device for preventing and treating urban waterlogging |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1396193A (en) * | 1919-04-30 | 1921-11-08 | Godin Adrien | Elevator, conveyer, and crane |
US4216997A (en) * | 1979-01-24 | 1980-08-12 | Stichweh Verwaltungs-Gmbh | Grab excavator with fixed jib |
EP0589536A1 (en) * | 1992-09-23 | 1994-03-30 | Nagron Mechanical Handling B.V. | Method for unloading a space and device for performing this method |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS498759B1 (en) * | 1968-10-05 | 1974-02-28 |
-
2008
- 2008-11-06 EP EP08168528A patent/EP2184406A1/en not_active Withdrawn
-
2009
- 2009-11-03 PL PL09174957T patent/PL2184405T3/en unknown
- 2009-11-03 EP EP09174957A patent/EP2184405B1/en not_active Not-in-force
- 2009-11-03 DK DK09174957.2T patent/DK2184405T3/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1396193A (en) * | 1919-04-30 | 1921-11-08 | Godin Adrien | Elevator, conveyer, and crane |
US4216997A (en) * | 1979-01-24 | 1980-08-12 | Stichweh Verwaltungs-Gmbh | Grab excavator with fixed jib |
EP0589536A1 (en) * | 1992-09-23 | 1994-03-30 | Nagron Mechanical Handling B.V. | Method for unloading a space and device for performing this method |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108425398A (en) * | 2018-04-03 | 2018-08-21 | 广州市昊力工具有限公司 | A kind of dredging method |
Also Published As
Publication number | Publication date |
---|---|
PL2184405T3 (en) | 2013-01-31 |
DK2184405T3 (en) | 2012-11-26 |
EP2184405B1 (en) | 2012-08-15 |
EP2184405A1 (en) | 2010-05-12 |
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