WO2009063080A1 - Dredging vessel - Google Patents

Dredging vessel Download PDF

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Publication number
WO2009063080A1
WO2009063080A1 PCT/EP2008/065616 EP2008065616W WO2009063080A1 WO 2009063080 A1 WO2009063080 A1 WO 2009063080A1 EP 2008065616 W EP2008065616 W EP 2008065616W WO 2009063080 A1 WO2009063080 A1 WO 2009063080A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
arms
head
pair
vessel according
Prior art date
Application number
PCT/EP2008/065616
Other languages
French (fr)
Inventor
John Simon Blight
Original Assignee
John Simon Blight
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 John Simon Blight filed Critical John Simon Blight
Priority to ES08849929T priority Critical patent/ES2382254T3/en
Priority to DK08849929.8T priority patent/DK2229485T3/en
Priority to PL08849929T priority patent/PL2229485T3/en
Priority to AT08849929T priority patent/ATE544913T1/en
Priority to EP08849929A priority patent/EP2229485B1/en
Publication of WO2009063080A1 publication Critical patent/WO2009063080A1/en

Links

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
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/8833—Floating installations
    • E02F3/885—Floating installations self propelled, e.g. ship
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9206—Digging devices using blowing effect only, like jets or propellers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9243—Passive suction heads with no mechanical cutting means
    • E02F3/925—Passive suction heads with no mechanical cutting means with jets
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9256—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head
    • E02F3/9262—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with jets
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
    • E02F5/287—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with jet nozzles

Definitions

  • the invention related to a dredging vessel.
  • a dredging vessel comprising: a) a floating member to float in ambient water, said floating member having a front end and a rear end, and propulsion means adjacent the rear end, b) a head connected to the floating member forward of the propulsion means and to move along the water bed upon movement of the floating vessel relative to the water bed, said head supporting at least one water outlet, and c) a water pump having an inlet connected to ambient water and an outlet connected to the or each head water outlet, in use said water pump delivering water under pressure to the or each head water outlet to disturb particulate material on a water bed whereby it mixes with ambient water, and said propulsion means drawing disturbed particulate material mixed with ambient water up towards the floating member, and said propulsion means ejecting disturbed particulate material mixed with ambient water to the rear of the vessel.
  • the head is connected between one first end of a pair of arms, the other second end of the pair of arms being connected to the floating vessel, said pair of arms keeping the head in a fixed position relative to the floating vessel.
  • the pair of arms is pivoted to the vessel.
  • the pair of arms extends forward from the rear end of the vessel.
  • the head comprises a first bar having along its length water outlets in the form of a plurality of nozzles.
  • the nozzles are each connected to the water pump through hoses.
  • the first bar can rotate relative to the pair of arms whereby to adjust the angle or the nozzles relative to the pair of arms.
  • the first bar may be rotated using a hydraulic ram.
  • the head further comprises a second bar having along its length water outlets in the form of a plurality of nozzles.
  • the nozzles are each connected to the water pump through hoses.
  • the second bar can rotate relative to the pair of arms whereby to adjust the angle or the nozzles relative to the pair of arms.
  • the second bar may be rotated using a hydraulic ram.
  • the first and second bars may be rotated independently.
  • jets of water from nozzles from both first and second bars form a "V" to disturb the particulate material with maximum effect.
  • Figure 1 shows a side view of a dredging vessel
  • Figure 2 shows a perspective view of part of Figure 1 with a head with first and second bars on a pair of arms.
  • Vessel 1 has a floating member in the form of a barge 2 adapted to float in ambient water.
  • Barge 2 has a bow 2A and stern 2B.
  • Barge 2 has adjacent its stern 2B propulsion means in the form of a propeller 3 to drive and manoeuvre the barge 2.
  • one or more bow thrusters 4 may be provided.
  • a pair of arms 1 OA, 1 OB is pivoted at one second end to the stern 2 A of barge 2. Arms 1 OA, 1 OB extend forward from the stern 2B, and can be raised or lowered using a wire 11.
  • a head in the form of first and second of rotating bars 12,13 are provided between first ends of arms 1OA, 1OB forward of the propeller 3.
  • Bar 12 has a lever 12A at one end connected to a hydraulic ram 12B.
  • Bar 13 has a lever 13A at end connected to a hydraulic ram 13B. Operation of hydraulic rams 12B13B rotate bars 12,13.
  • Bars 12,13 are kept in a fixed position relative to barge 2 by means of wire 11.
  • Bars 12,13 can be raised or lowered so they are adjacent the water bed by lengthening or shortening a wire 11.
  • Bars 12 and 13 each support a plurality of nozzles 14 each connected by a hydraulic pipe 15 to outlet of high pressure water pump 16.
  • Pump 16 has an inlet 16A connected to ambient water. Bars 12,13 move along the water bed upon movement of the barge 2 relative to the water bed.
  • the water pump 16 delivers water under pressure to the nozzles. Jets of water emerge from the nozzles to disturb particulate material on a water bed whereby it mixes with ambient water.
  • propeller 3 draws disturbed particulate material mixed with ambient water up towards the barge 2, and the propeller 3 ejects disturbed particulate material mixed with ambient water to the rear of the vessel where it can move out of the area as the water flows (e.g. as a river or with the tide).
  • bars 12,13 are rotated so that the jets of water from nozzles 14 from both bars 12 and 13 form a "V" to disturb the particulate material with maximum effect.
  • Bars 12 and 13 are rotated into different positions to accommodate different angles of pair of arms 1OA, 1OB relative to barge 2.
  • the nozzles from bar 13 may direct jets of water backwards and the nozzles from bar 12 may direct jets of water forwards.
  • a single hydraulic motor 17 (or other mechanical or electrical or electronic power source) may be used to power pump 16 and propeller 3. It has been found that keeping the head around Vi metre above the waterbed disturbs the particulate material with maximum effect.
  • the force of water from the twin spray-bar action (bars 12 and 13) undercuts and dislodges particulate material from the waterbed. This is particularly effective when used on hard-packed mud or silt where a single spray-bar or bar with low pressure water jets may have limited impact.
  • the twin spray bars break up chunks of mud or silt into small particles through the pulverising action of the two interlocking spray streams.
  • the forward bar 13 which angles spray towards the rear of the barge, acts additionally to accelerate the stream of water containing particulate material towards the rear of the barge where the action of the barge propeller moves the particulate material into the ambient current or outgoing tidal stream.
  • the pressure of water fed to each bar 12,13 from the water pump 16 can be varied to accentuate the undercutting effect, the pulverising effect or to flush water containing particulate material in suspension towards the rear of the barge, according to the operational requirement.
  • the arms connected to the spray bars, and which pivot at the stern of the barge must be raised and lowered according to the depth of water the barge is operating in. It follows that, in order to maintain the optimal angle of the V-spray to the waterbed, the spray-bars must be capable of being rotated independently as the arms are raised or lowered, and this may be a key part of the design.
  • the invention may take a form different to that specifically described above.
  • the head could comprise just a single bar 13.
  • the nozzles 14 could be adjusted or selected for controlling flow rates of water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Cleaning Or Clearing Of The Surface Of Open Water (AREA)
  • Table Devices Or Equipment (AREA)
  • Disintegrating Or Milling (AREA)
  • Catching Or Destruction (AREA)
  • Lubricants (AREA)
  • Toys (AREA)
  • Hydraulic Turbines (AREA)

Abstract

The invention relates to a dredging vessel 1. Vessel 1 has a floating member 2 to float in ambient water, the floating member having a front end 2A and a rear end 2B, and propulsion means 3 adjacent the rear end 2B. A head 12,13 is connected to the floating member 2 forward of the propulsion means 3 and moves along the water bed upon movement of the floating vessel relative to the water bed. Head 12,13 supports at least one water outlet 14. A water pump 16 has an inlet 16A connected to ambient water and an outlet connected to the or each head water outlet 14. In use the water pump 16 delivers water under pressure to the or each head water outlet 14 to disturb particulate material on a water bed whereby it mixes with ambient water, and the propulsion means draws disturbed particulate material mixed with ambient water up towards the floating member, and the propulsion means ejecting disturbed particulate material mixed with ambient water to the rear of the vessel.

Description

Title: Dredging Vessel
The invention related to a dredging vessel.
According to the present invention there is provided a dredging vessel comprising: a) a floating member to float in ambient water, said floating member having a front end and a rear end, and propulsion means adjacent the rear end, b) a head connected to the floating member forward of the propulsion means and to move along the water bed upon movement of the floating vessel relative to the water bed, said head supporting at least one water outlet, and c) a water pump having an inlet connected to ambient water and an outlet connected to the or each head water outlet, in use said water pump delivering water under pressure to the or each head water outlet to disturb particulate material on a water bed whereby it mixes with ambient water, and said propulsion means drawing disturbed particulate material mixed with ambient water up towards the floating member, and said propulsion means ejecting disturbed particulate material mixed with ambient water to the rear of the vessel.
Preferably the head is connected between one first end of a pair of arms, the other second end of the pair of arms being connected to the floating vessel, said pair of arms keeping the head in a fixed position relative to the floating vessel. Preferably the pair of arms is pivoted to the vessel. Preferably the pair of arms extends forward from the rear end of the vessel.
Preferably the head comprises a first bar having along its length water outlets in the form of a plurality of nozzles. Preferably the nozzles are each connected to the water pump through hoses. Preferably the first bar can rotate relative to the pair of arms whereby to adjust the angle or the nozzles relative to the pair of arms. The first bar may be rotated using a hydraulic ram.
Preferably the head further comprises a second bar having along its length water outlets in the form of a plurality of nozzles. Preferably the nozzles are each connected to the water pump through hoses. Preferably the second bar can rotate relative to the pair of arms whereby to adjust the angle or the nozzles relative to the pair of arms. The second bar may be rotated using a hydraulic ram.
The first and second bars may be rotated independently.
Preferably jets of water from nozzles from both first and second bars form a "V" to disturb the particulate material with maximum effect. An embodiment of the invention will now be described with reference to the accompanying drawings in which:
Figure 1 shows a side view of a dredging vessel,
Figure 2 shows a perspective view of part of Figure 1 with a head with first and second bars on a pair of arms.
Referring to the drawings there is shown a dredging vessel 1.
Vessel 1 has a floating member in the form of a barge 2 adapted to float in ambient water. Barge 2 has a bow 2A and stern 2B. Barge 2 has adjacent its stern 2B propulsion means in the form of a propeller 3 to drive and manoeuvre the barge 2. In addition one or more bow thrusters 4 may be provided.
A pair of arms 1 OA, 1 OB is pivoted at one second end to the stern 2 A of barge 2. Arms 1 OA, 1 OB extend forward from the stern 2B, and can be raised or lowered using a wire 11.
A head in the form of first and second of rotating bars 12,13 are provided between first ends of arms 1OA, 1OB forward of the propeller 3. Bar 12 has a lever 12A at one end connected to a hydraulic ram 12B. Bar 13 has a lever 13A at end connected to a hydraulic ram 13B. Operation of hydraulic rams 12B13B rotate bars 12,13. Bars 12,13 are kept in a fixed position relative to barge 2 by means of wire 11. Bars 12,13 can be raised or lowered so they are adjacent the water bed by lengthening or shortening a wire 11. Bars 12 and 13 each support a plurality of nozzles 14 each connected by a hydraulic pipe 15 to outlet of high pressure water pump 16. Pump 16 has an inlet 16A connected to ambient water. Bars 12,13 move along the water bed upon movement of the barge 2 relative to the water bed.
In use, the water pump 16 delivers water under pressure to the nozzles. Jets of water emerge from the nozzles to disturb particulate material on a water bed whereby it mixes with ambient water. As barge 2 moves and as shown by the arrows in Figure 2, propeller 3 draws disturbed particulate material mixed with ambient water up towards the barge 2, and the propeller 3 ejects disturbed particulate material mixed with ambient water to the rear of the vessel where it can move out of the area as the water flows (e.g. as a river or with the tide).
In use bars 12,13 are rotated so that the jets of water from nozzles 14 from both bars 12 and 13 form a "V" to disturb the particulate material with maximum effect. Bars 12 and 13 are rotated into different positions to accommodate different angles of pair of arms 1OA, 1OB relative to barge 2. In this respect it will be seen that the nozzles from bar 13 may direct jets of water backwards and the nozzles from bar 12 may direct jets of water forwards.
A single hydraulic motor 17 (or other mechanical or electrical or electronic power source) may be used to power pump 16 and propeller 3. It has been found that keeping the head around Vi metre above the waterbed disturbs the particulate material with maximum effect.
The force of water from the twin spray-bar action (bars 12 and 13) undercuts and dislodges particulate material from the waterbed. This is particularly effective when used on hard-packed mud or silt where a single spray-bar or bar with low pressure water jets may have limited impact. The twin spray bars break up chunks of mud or silt into small particles through the pulverising action of the two interlocking spray streams.
The forward bar 13, which angles spray towards the rear of the barge, acts additionally to accelerate the stream of water containing particulate material towards the rear of the barge where the action of the barge propeller moves the particulate material into the ambient current or outgoing tidal stream.
The pressure of water fed to each bar 12,13 from the water pump 16 can be varied to accentuate the undercutting effect, the pulverising effect or to flush water containing particulate material in suspension towards the rear of the barge, according to the operational requirement.
It is evident that the arms connected to the spray bars, and which pivot at the stern of the barge, must be raised and lowered according to the depth of water the barge is operating in. It follows that, in order to maintain the optimal angle of the V-spray to the waterbed, the spray-bars must be capable of being rotated independently as the arms are raised or lowered, and this may be a key part of the design.
The invention may take a form different to that specifically described above. For example the head could comprise just a single bar 13. The nozzles 14 could be adjusted or selected for controlling flow rates of water.
Further modifications will be apparent to those skilled in the art without departing from the scope of the present invention.

Claims

1. A dredging vessel comprising: a) a floating member to float in ambient water, said floating member having a front end and a rear end, and propulsion means adjacent the rear end, b) a head connected to the floating member forward of the propulsion means and to move along the water bed upon movement of the floating vessel relative to the water bed, said head supporting at least one water outlet, and c) a water pump having an inlet connected to ambient water and an outlet connected to the or each head water outlet, in use said water pump delivering water under pressure to the or each head water outlet to disturb particulate material on a water bed whereby it mixes with ambient water, and said propulsion means drawing disturbed particulate material mixed with ambient water up towards the floating member, and said propulsion means ejecting disturbed particulate material mixed with ambient water to the rear of the vessel.
2. A dredging vessel according to claiml, wherein the head is connected between one first end of a pair of arms, the other second end of the pair of arms being connected to the floating vessel, said pair of arms keeping the head in a fixed position relative to the floating vessel.
3. A dredging vessel according to claim 2, wherein the pair of arms is pivoted to the vessel.
4. A dredging vessel according to claim 2 or 3, wherein the pair of arms extends forward from the rear end of the vessel.
5. A dredging vessel according to any preceding claim, wherein the head comprises a first bar having along its length water outlets in the form of a plurality of nozzles.
6. A dredging vessel according to claim 5, wherein the nozzles are each connected to the water pump through hoses.
7. A dredging vessel according to claim 5 or 6, wherein the first bar can rotate relative to the pair of arms whereby to adjust the angle or the nozzles relative to the pair of arms.
8. A dredging vessel according to claim 7, wherein the first bar is rotated using a hydraulic ram.
9. A dredging vessel according to any of claims 5 to 8, wherein the head further comprises a second bar having along its length water outlets in the form of a plurality of nozzles.
10. A dredging vessel according to claim 9 wherein the nozzles are each connected to the water pump through hoses.
11. A dredging vessel according to claim 9 or 10, wherein the second bar can rotate relative to the pair of arms whereby to adjust the angle or the nozzles relative to the pair of arms.
12. A dredging vessel according to claim 11 , wherein the second bar is rotated using a hydraulic ram.
13. A dredging vessel according to any of claims 5 to 12, wherein the first and second bars can be rotated independently.
14. A dredging vessel according to any of claims 5 to 13, wherein the jets of water from nozzles from both first and second bars form a "V" to disturb the particulate material with maximum effect.
15. A dredging vessel substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
PCT/EP2008/065616 2007-11-16 2008-11-14 Dredging vessel WO2009063080A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES08849929T ES2382254T3 (en) 2007-11-16 2008-11-14 Dredging ship
DK08849929.8T DK2229485T3 (en) 2007-11-16 2008-11-14 DEEPENING THE SHIP
PL08849929T PL2229485T3 (en) 2007-11-16 2008-11-14 Dredging vessel
AT08849929T ATE544913T1 (en) 2007-11-16 2008-11-14 DREGDER SHIP
EP08849929A EP2229485B1 (en) 2007-11-16 2008-11-14 Dredging vessel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0722577A GB2454729A (en) 2007-11-16 2007-11-16 Dredging vessel with a propeller used for propulsion and for distributing dredged sediment
GB0722577.4 2007-11-16

Publications (1)

Publication Number Publication Date
WO2009063080A1 true WO2009063080A1 (en) 2009-05-22

Family

ID=38896475

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/065616 WO2009063080A1 (en) 2007-11-16 2008-11-14 Dredging vessel

Country Status (8)

Country Link
EP (1) EP2229485B1 (en)
AT (1) ATE544913T1 (en)
DK (1) DK2229485T3 (en)
ES (1) ES2382254T3 (en)
GB (1) GB2454729A (en)
PL (1) PL2229485T3 (en)
PT (1) PT2229485E (en)
WO (1) WO2009063080A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105178379A (en) * 2015-10-18 2015-12-23 陆璟璇 Desilting device for urban hydraulic engineering
CN108222097A (en) * 2018-01-29 2018-06-29 芜湖市皖南造船有限公司 A kind of dredger

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0916961D0 (en) * 2009-09-28 2009-11-11 Harris Nicholas Improvements in or relating to dredging and scouring
WO2012163865A2 (en) 2011-05-28 2012-12-06 John Simon Blight Improved heads for dredging
GB2491571A (en) * 2011-05-28 2012-12-12 John Simon Blight Dredging system with internal water channels
CN103112552A (en) * 2011-11-16 2013-05-22 张瑞麟 Dredging and slit flushing boat
CN109826265B (en) * 2019-01-08 2021-04-16 王美玲 Single-unit hydraulic dredger
CN112554262A (en) * 2020-11-29 2021-03-26 李彦虎 Quick desilting device of hydraulic engineering with stirring function
GB2616696A (en) * 2022-10-24 2023-09-20 Harwich Haven Authority Sediment agitating method and apparatus

Citations (4)

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Publication number Priority date Publication date Assignee Title
US2318587A (en) * 1942-01-03 1943-05-11 Jr James D Andrews Subaqueous grading apparatus
FR1359325A (en) 1963-03-14 1964-04-24 Self-propelled carrying, upsetting and suction dredger in motion
GB2092643A (en) * 1981-02-05 1982-08-18 Conoco Inc Dredging apparatus
US5285587A (en) * 1993-03-29 1994-02-15 Krenzler Leo M Underwater mining dredge

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Publication number Priority date Publication date Assignee Title
US2978819A (en) * 1957-08-01 1961-04-11 Fairley Inc Shell dredger
NL8300990A (en) * 1983-03-18 1984-10-16 Ir Reijer Nicolaas Van Weezenb METHOD FOR REMOVING SLUDGE OR MUD FROM THE BOTTOM OF A WATER AREA.
US5546682A (en) * 1994-10-05 1996-08-20 Skerry; Eric Sediment relocation machine
GB2359101A (en) * 2000-02-09 2001-08-15 Thomas Hasler Dredging Vessel
GB2427884A (en) * 2005-07-01 2007-01-10 Wayne Challis Propulsion dredging attachment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2318587A (en) * 1942-01-03 1943-05-11 Jr James D Andrews Subaqueous grading apparatus
FR1359325A (en) 1963-03-14 1964-04-24 Self-propelled carrying, upsetting and suction dredger in motion
GB2092643A (en) * 1981-02-05 1982-08-18 Conoco Inc Dredging apparatus
US5285587A (en) * 1993-03-29 1994-02-15 Krenzler Leo M Underwater mining dredge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105178379A (en) * 2015-10-18 2015-12-23 陆璟璇 Desilting device for urban hydraulic engineering
CN108222097A (en) * 2018-01-29 2018-06-29 芜湖市皖南造船有限公司 A kind of dredger

Also Published As

Publication number Publication date
GB2454729A (en) 2009-05-20
ATE544913T1 (en) 2012-02-15
DK2229485T3 (en) 2012-05-29
GB0722577D0 (en) 2007-12-27
PL2229485T3 (en) 2012-07-31
EP2229485A1 (en) 2010-09-22
EP2229485B1 (en) 2012-02-08
PT2229485E (en) 2012-05-17
ES2382254T3 (en) 2012-06-06

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