NL2009957C2 - Suction head for a dredger. - Google Patents

Suction head for a dredger. Download PDF

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Publication number
NL2009957C2
NL2009957C2 NL2009957A NL2009957A NL2009957C2 NL 2009957 C2 NL2009957 C2 NL 2009957C2 NL 2009957 A NL2009957 A NL 2009957A NL 2009957 A NL2009957 A NL 2009957A NL 2009957 C2 NL2009957 C2 NL 2009957C2
Authority
NL
Netherlands
Prior art keywords
suction head
inlet
sand
sand inlet
dredging
Prior art date
Application number
NL2009957A
Other languages
Dutch (nl)
Inventor
Carel Frederik Hofstra
Erwin Cornelis Johannes Bijvoet
Bram Adrianus Waltherus Spaendonk
Roland Andre Pieter Higler
Original Assignee
Ihc Holland Ie Bv
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 Ihc Holland Ie Bv filed Critical Ihc Holland Ie Bv
Priority to NL2009957A priority Critical patent/NL2009957C2/en
Priority to EP13808269.8A priority patent/EP2931982A1/en
Priority to SG11201504539XA priority patent/SG11201504539XA/en
Priority to US14/651,563 priority patent/US20160186409A1/en
Priority to CN201380064964.6A priority patent/CN104854279A/en
Priority to PCT/NL2013/050884 priority patent/WO2014092567A1/en
Application granted granted Critical
Publication of NL2009957C2 publication Critical patent/NL2009957C2/en

Links

Classifications

    • 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
    • E02F3/902—Component parts, e.g. arrangement or adaptation of pumps for modifying the concentration of the dredged material, e.g. relief valves preventing the clogging of the suction pipe
    • 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
    • E02F3/9243—Passive suction heads with no mechanical cutting means
    • 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

Abstract

A suction head (1) for a dredger, includes;—an outlet (2) for fluidly coupling the suction head with a suction tube (3) for transport of dredge to the loading space of a floating dredger;—a sand inlet (4), which in use faces a sand bed (5) to be sucked away, for taking in a flow of dredge (6) in the suction head, and which flow of dredge runs in a dredge flow direction (7) at the sand inlet;—a side inlet (8) fluidly coupled with the sand inlet, wherein the side inlet and the outlet are arranged at opposite sides of the suction head for introducing a lateral flow (9) from outside the suction head into the suction head locally at the sand inlet, which lateral flow runs substantially transverse relative to the dredge flow direction.

Description

Suction head for a dredger Background 5 The present invention relates to a suction head for a dredger, such a suction head having; - an outlet for fluidly coupling the suction head with a suction tube for transport of dredge to the loading space of a floating dredger, and a - a sand inlet, which in use faces a sand bed to be sucked away, for taking in a flow 10 of dredge in the suction head, and which flow of dredge runs in a dredge flow direction at the sand inlet.
JP61028635 A discloses a suction head device for sludge dredging work. The device has a rotator with a screw blade provided along an opening in the bottom of the 15 body to permit dredging work with high sludge contents. This known device requires a high number of parts and is relatively complex for increase the sludge contents.
Summary of the invention 20 The invention aims to provide a suction head for a dredger which head enables to operate the dredge at a high sludge content.
Another object of the invention is to improve a suction head for a dredger and partly solve at least one of the problems associated with known suction heads.
Yet another object of the invention is to provide an alternative suction head for a 25 dredger.
According to a first aspect of the invention this is realized with a suction head for a dredger, the suction head comprising; - an outlet for fluidly coupling the suction head with a suction tube for transport of 30 dredge to the loading space of a floating dredger, - a sand inlet, which in use faces a sand bed to be sucked away, for taking in a flow of dredge in the suction head, and which flow of dredge runs in a dredge flow direction at the sand inlet, 2 - a side inlet fluidly coupled with the sand inlet, wherein the side inlet and the outlet are mutually arranged for introducing a lateral flow from outside the suction head into the suction head locally at the sand inlet, which lateral flow runs substantially transverse relative to the dredge flow direction.
5
The lateral flow associated with the side inlet causes swirl in the suction head locally at the sand inlet and therefore enhances formation of a sand/water mixture which causes a higher sand share in the mixture when the mixture enters the outlet. This is beneficial in terms of operational costs. Less water is pumped as a transport 10 medium which saves energy and also reduces the overflow losses. The higher sand share or high sludge content is also referred to as high density dredging.
The side inlet means that the flow which enters there through has a component which is lateral relative to the dredge flow direction at the sand inlet. The side inlet is not necessarily arranged at the side of the suction head relative to its direction of travel. 15 Both the “side” inlet, and the lateral flow originating from outside the suction head, explain that the lateral flow is different from the flow of dredge which is the main flow.
In an embodiment of the invention, the side inlet is transversely oriented relative 20 to the sand inlet. This is optimal in terms of effect of the side inlet.
In an embodiment of the invention, the side inlet, in use, faces away from the sand bed to be sucked away for taking in relative clear water. This even more makes clear that the lateral flow is different from the flow of dredge which is the main flow.
25
In an embodiment of the invention, the sand inlet has a sand inlet cross sectional area and the side inlet has a side inlet cross sectional area, and the side inlet cross sectional area is relative small with respect to the sand inlet cross sectional area, preferably between 10-25% of the sand inlet cross sectional area. This makes clear that 30 the lateral water intake flow is small compared with the flow of dredge which is the main flow.
3
In an embodiment of the invention, the side inlet changes over, preferably smoothly changes over, into the sand inlet. This enables a more simple configuration and manufacture of the suction head.
5 In an embodiment of the invention the sand inlet and the side inlet are integrally formed. This enables an even more simple configuration and manufacture of the suction head.
In an embodiment of the invention, the suction head comprises a number of side 10 inlets.
In an embodiment of the invention, the suction head comprises a pair of opposite side inlets.
15 In an embodiment of the invention, wherein the side inlet and the outlet are arranged at opposite sides of the suction head. This is beneficial in terms of effect of the side inlet because the lateral flow extend along the entire width of the suction head, which mean the entire flow of dredge.
20 In an embodiment of the invention, the suction head comprises a jet water device having a jet water outlet arranged for introducing a flow into a side inlet associated with the jet water outlet. This even more increases the effect of the lateral flow.
In an embodiment of the invention the jet water outlet is fluidly coupled with the 25 side inlet associated with the jet water outlet.
In an embodiment of the invention, the suction head comprises a passive or active excavated layer height adjusting device. The layer adjusting device can be passive or active, wherein active means that the height of the excavated layer is a result of a set 30 value and in case of a passive layer adjusting device, the excavated layer is a result of for example the weight of the suction head.
4
According to a further aspect of the invention this is realized with a dredging vessel, like a hopper, comprising a suction head according to the invention. The dredging vessel may use an outboard submersed dredge pump which is even more beneficial for high denstity dredging.
5
According to an even further aspect of the invention this is realized with a method for operating a suction head for a dredger, the suction head comprising; - an outlet for fluidly coupling the suction head with a suction tube for transport of dredge to the loading space of a floating dredge, 10 - a sand inlet, which in use faces a sand bed to be sucked away, for taking in a flow of dredge in the suction head, and which flow of dredge runs in a dredge flow direction at the sand inlet, the method comprising the step; - introducing a lateral flow, relative to the dredge flow direction, in the suction 15 head locally at the sand inlet.
The invention further relates to a device comprising one or more of the characterising features described in the description and/or shown in the attached drawings.
20 The invention further relates to a method comprising one or more of the characterising features described in the description and/or shown in the attached drawings.
The various aspects discussed in this patent can be combined in order to provide additional advantageous advantages.
25
Description of the drawings
The invention will be further elucidated referring to an preferred embodiment shown in the drawing wherein shown in: 30 Fig. 1 in perspective view a schematic drawing of a first embodiment of a suction head according to the invention; fig. 2 in perspective view a further embodiment of a suction head according to the invention; and 5 fig. 3 another perspective view of a suction head according to fig. 2.
Detailed description of embodiments 5
The invention will further be elucidated referring to all figures 1-3. Fig. shows a suction head 1 for a dredger. Such a suction head 1 is dragged by a dredger along the sand bed 5 to be sucked away. The suction head 1 comprises an outlet 2 for fluidly coupling the suction head 1 with a suction tube 3 for transport of dredge to the loading 10 space of a floating dredger, which loading space and dredger are not shown. The suction tube 3 usually extends in the dragging direction 24 of the suction head 1 as is shown here.
The suction head 1 comprises a sand inlet 4. In use, this inlet 4 in use faces a sand bed 5 to be sucked away. In fig. 1 the inlet 4 and the top face of the sand bed 5 coincide 15 however this coinciding is not strictly required as is clear from fig. 2 and 3 wherein the inlet 4 and the top face of the sand bed 5 do not coincide however the inlet 4 still faces a sand bed 5 to be sucked away. The inlet 4 takes in a flow of dredge 6 in the suction head 1. The flow of dredge 6 runs in a dredge flow direction 7 at the sand inlet 4 and then continuous through the suction head 1 to the outlet 2.
20 The suction head 1 comprises a side inlet 8 which is fluidly coupled with the sand inlet 4. The side inlet 8 and the outlet 2 are mutually arranged for introducing a lateral flow 9 from outside the suction head 1 into the suction head locally at the sand inlet 4. The lateral flow 9 has a lateral flow direction 12, at the sand inlet 4, which runs substantially transverse relative to the dredge flow direction 7 for causing swirl in the 25 suction head 1 locally at the sand inlet 4. The side inlet 8 is transversely oriented relative to the sand inlet 4 which is optimal in terms of causing swirl in the suction head 1 locally at the sand inlet 4. During use, the side inlet 8 faces away from the sand bed 5 to be sucked away for taking in relative clear water, this clear water is however not strictly required for causing swirl in the suction head 1 locally at the sand inlet 4. The 30 sand inlet 4 has a sand inlet cross sectional area 10 and the side inlet 8 has a side inlet cross sectional area 11. The side inlet cross sectional area 11 is relative small with respect to the sand inlet cross sectional area 10, here between 10-25% of the sand inlet cross sectional area 10. The sand inlet cross sectional area 10 is defined by frame 6 members of the suction head 1, in fig 2, 3 by frame members 17, 18, 19, 20 where frame members 18, 20 are an imaginary limitation. In fig. 1. the side inlet cross sectional area 11 is defined by side inlet frame members 13, 14, 15, 16. In fig. 2, 3 the side inlet cross sectional area 11 is defined by side inlet frame members 18, 21, where 5 frame member 18 is an imaginary limitation. In fig. 2, 3 the side inlet 8 changes smoothly over into the sand inlet 4. In other words, the side inlet 8 and the sand inlet 4 share a common imaginary frame member 18, 20. The sand inlet 4 and the side inlet 8 may be integrally formed. In fig. 2, 3 the suction head 1 has a number of side inlets 8, in this case a pair of opposite side inlets 8. In fig. 1, the side inlet 8 and the outlet 2 are 10 arranged at opposite sides of the suction head 1.
The suction head 1 may comprise a jet water device (not shown) having a jet water outlet arranged for introducing a flow into a side inlet 8 associated with the jet water outlet. The jet water outlet may be fluidly coupled with the side inlet 8 associated 15 with the j et water outlet.
During use of the suction head 1, a lateral flow 9 is introduced at the sand inlet 4, relative to the dredge flow direction 7, in the suction head 1 locally at the sand inlet 4.
20 It will also be obvious after the above description and drawings are included to illustrate some embodiments of the invention, and not to limit the scope of protection. Starting from this disclosure, many more embodiments will be evident to a skilled person which are within the scope of protection and the essence of this invention and which are obvious combinations of prior art techniques and the disclosure of this 25 patent.

Claims (14)

1. Zuigkop (1) voor een baggervaartuig, waarbij de zuigkop omvat; - een uitlaat (2) voor fluïdumverbinding van de zuigkop met een zuigbuis 5 (3) voor vervoer van bagger naar de laadruimte van een drijvend baggervaartuig, - een zandinlaat (4), die in gebruik gericht is naar een weg te zuigen zandbed (5), voor het innemen van een baggerstroom (6) in de zuigkop, en welke baggerstroom loopt in een baggerstroomrichting (7) bij de 10 zandinlaat, - een zij inlaat (8), in fluïdumverbinding met de zandinlaat, waarbij de zijinlaat en de uitlaat ten opzicht van elkaar zijn gerangschikt voor de invoering van een laterale stroom (9) van buiten de zuigkop in de zuigkop lokaal bij de zandinlaat, welke laterale stroom in hoofdzaak 15 transversaal ten opzichte van de baggerstroomrichting loopt.A suction head (1) for a dredging vessel, the suction head comprising; - an outlet (2) for fluid communication of the suction head with a suction tube 5 (3) for transporting dredge to the loading space of a floating dredging vessel, - a sand inlet (4), which in use is directed towards a sand bed to be sucked away (5) ), for taking in a dredging stream (6) in the suction head, and which dredging stream runs in a dredging flow direction (7) at the sand inlet, - a side inlet (8), in fluid communication with the sand inlet, the side inlet and the outlet are arranged with respect to each other for introducing a lateral stream (9) from outside the suction head into the suction head locally at the sand inlet, which lateral stream runs substantially transversely of the dredging flow direction. 2. Zuigkop volgens conclusie 1, waarbij de zijinlaat transversaal is georiënteerd ten opzichte van de zandinlaat.The suction head of claim 1, wherein the side inlet is transversely oriented with respect to the sand inlet. 3. Zuigkop volgens een voorgaande conclusie, waarbij de zijinlaat, in gebruik, is afgekeerd van het weg te zuigen zandbed voor het innemen van relatief helder water.3. Suction head according to a preceding claim, wherein the side inlet, in use, is turned away from the sand bed to be sucked away for taking in relatively clear water. 4. Zuigkop volgens een voorgaande conclusie, waarbij de zandinlaat een 25 dwarsdoorsnedeoppervlak (10) van de zandinlaat heeft en de zijinlaat een dwarsdoorsnedeoppervlak (11) van de zijinlaat heeft, en het dwarsdoorsnedeoppervlak van de zijinlaat relatief klein is met betrekking tot het dwarsdoorsnedeoppervlak van de zandinlaat, bij voorkeur tussen 10-25% van het dwarsdoorsnedeoppervlak van de zandinlaat. 304. Suction head according to a preceding claim, wherein the sand inlet has a cross-sectional area (10) of the sand inlet and the side inlet has a cross-sectional area (11) of the side inlet, and the cross-sectional area of the side inlet is relatively small with respect to the cross-sectional area of the side inlet sand inlet, preferably between 10-25% of the cross-sectional area of the sand inlet. 30 5. Zuigkop volgens een voorgaande conclusie, waarbij de zijinlaat overgaat, bij voorkeur soepel overgaat, in de zandinlaat.A suction head according to any preceding claim, wherein the side inlet passes, preferably passes smoothly, into the sand inlet. 6. Zuigkop volgens een voorgaande conclusie, waarbij de zandinlaat en de zij inlaat integraal zijn gevormd.The suction head according to any preceding claim, wherein the sand inlet and the side inlet are integrally formed. 7. Zuigkop volgens een voorgaande conclusie, waarbij de zuigkop een aantal 5 zij inlaten omvat.7. Suction head according to a preceding claim, wherein the suction head comprises a number of side inlets. 8. Zuigkop volgens conclusie 7, waarbij de zuigkop een paar tegenoverliggende zij inlaten omvat.The suction head of claim 7, wherein the suction head comprises a pair of opposite side inlets. 9. Zuigkop volgens een voorgaande conclusie, waarbij de zijinlaat en de uitlaat zijn gerangschikt aan weerszijden van de zuigkop.The suction head according to any preceding claim, wherein the side inlet and the outlet are arranged on either side of the suction head. 10. Zuigkop volgens een voorgaande conclusie, omvattend een jetwaterinrichting met een jetwateruitlaat gerangschikt voor de invoering van een stroom in een 15 zij ingang in samenhang met de j etwateruitlaat.10. Suction head according to a preceding claim, comprising a jet water device with a jet water outlet arranged for introducing a stream into a side entrance in connection with the jet water outlet. 11. Zuigkop volgens conclusie 10, waarbij de jetwateruitlaat in fluidumverbinding is met de zijinlaat in samenhang met de jetwateruitlaat.The suction head of claim 10, wherein the jet water outlet is in fluid communication with the side inlet in conjunction with the jet water outlet. 12. Zuigkop volgens een voorgaande conclusie, omvattend een inrichting voor passieve of actieve hoogte-instelling van de gedolven laag.A suction head according to any preceding claim, comprising a device for passive or active height adjustment of the mined layer. 13. Baggerschip, zoals een hopper, omvattend een zuigkop volgens een voorgaande conclusie. 25A dredger, such as a hopper, comprising a suction head according to a preceding claim. 25 14. Werkwijze voor werking van een zuigkop voor een baggervaartuig, waarbij de zuigkop omvat; - een uitlaat voor fluidumverbinding van de zuigkop met een zuigbuis voor vervoer van bagger naar de laadruimte van een drijvend 30 baggervaartuig, - een zandinlaat, die in gebruik gericht is naar een weg te zuigen zandbed, voor het innemen van een baggerstroom in de zuigkop, en welke baggerstroom loopt in een baggerstroomrichting bij de zandinlaat, waarbij de werkwijze de stap omvat; - invoeren van een laterale stroom, ten opzichte van de baggerstroomrichting in de zuigkop lokaal bij de zandinlaat. 5 -o-o-o-o-o-o-A method for operating a suction head for a dredging vessel, the suction head comprising; - an outlet for fluid communication from the suction head with a suction tube for transporting dredge to the loading space of a floating dredging vessel, - a sand inlet, which in use is directed towards a sand bed to be sucked away, for taking in a dredging stream in the suction head, and which dredging flow runs in a dredging flow direction at the sand inlet, the method comprising the step; - introducing a lateral flow relative to the dredging flow direction in the suction head locally at the sand inlet. 5-o-o-o-o-o-
NL2009957A 2012-12-11 2012-12-11 Suction head for a dredger. NL2009957C2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL2009957A NL2009957C2 (en) 2012-12-11 2012-12-11 Suction head for a dredger.
EP13808269.8A EP2931982A1 (en) 2012-12-11 2013-12-10 Suction head for a dredger
SG11201504539XA SG11201504539XA (en) 2012-12-11 2013-12-10 Suction head for a dredger
US14/651,563 US20160186409A1 (en) 2012-12-11 2013-12-10 Suction head for a dredger
CN201380064964.6A CN104854279A (en) 2012-12-11 2013-12-10 Suction head for dredger
PCT/NL2013/050884 WO2014092567A1 (en) 2012-12-11 2013-12-10 Suction head for a dredger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2009957 2012-12-11
NL2009957A NL2009957C2 (en) 2012-12-11 2012-12-11 Suction head for a dredger.

Publications (1)

Publication Number Publication Date
NL2009957C2 true NL2009957C2 (en) 2014-06-12

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ID=47561773

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2009957A NL2009957C2 (en) 2012-12-11 2012-12-11 Suction head for a dredger.

Country Status (6)

Country Link
US (1) US20160186409A1 (en)
EP (1) EP2931982A1 (en)
CN (1) CN104854279A (en)
NL (1) NL2009957C2 (en)
SG (1) SG11201504539XA (en)
WO (1) WO2014092567A1 (en)

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Publication number Priority date Publication date Assignee Title
BE1021095B1 (en) * 2013-11-04 2016-01-18 VAN ROMPAY BOUDEWIJN GABRIëL DEVICE AND METHOD FOR REMOVING SLUDGE FROM THE BOTTOM OF A WATER FIELD
US10450720B2 (en) * 2016-04-21 2019-10-22 Boudewijn Gabriël Van Rompay Device and method for removing alluvial deposits from the bed of a body of water
GB2570167B (en) * 2018-04-20 2020-07-29 Rotech Group Ltd Improvements in and relating to underwater excavation apparatus
CN111561008B (en) * 2020-05-21 2022-07-26 镇江市亿华系统集成有限公司 Method for evaluating and assisting decision-making of dredger end dredging process of drag suction dredger

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FR834639A (en) * 1937-08-02 1938-11-25 Improvements to the suction pipes of suction dredgers or other devices sucking solids suspended in a liquid
FR1399762A (en) * 1964-04-03 1965-05-21 Grenobloise Etude Appl Improvements to suction dredgers
JPS56150258U (en) * 1980-04-11 1981-11-11
US20040148813A1 (en) * 2003-02-05 2004-08-05 Ea Engineering Science And Technology, Inc. Dredging method and apparatus
US20070130807A1 (en) * 2005-12-12 2007-06-14 Kohutko Richard J Suction head for sediment dredge

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Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR834639A (en) * 1937-08-02 1938-11-25 Improvements to the suction pipes of suction dredgers or other devices sucking solids suspended in a liquid
FR1399762A (en) * 1964-04-03 1965-05-21 Grenobloise Etude Appl Improvements to suction dredgers
JPS56150258U (en) * 1980-04-11 1981-11-11
US20040148813A1 (en) * 2003-02-05 2004-08-05 Ea Engineering Science And Technology, Inc. Dredging method and apparatus
US20070130807A1 (en) * 2005-12-12 2007-06-14 Kohutko Richard J Suction head for sediment dredge

Also Published As

Publication number Publication date
US20160186409A1 (en) 2016-06-30
SG11201504539XA (en) 2015-07-30
WO2014092567A1 (en) 2014-06-19
CN104854279A (en) 2015-08-19
EP2931982A1 (en) 2015-10-21

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