EP1653009A1 - Cutting member for a dredging system - Google Patents

Cutting member for a dredging system Download PDF

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Publication number
EP1653009A1
EP1653009A1 EP04077954A EP04077954A EP1653009A1 EP 1653009 A1 EP1653009 A1 EP 1653009A1 EP 04077954 A EP04077954 A EP 04077954A EP 04077954 A EP04077954 A EP 04077954A EP 1653009 A1 EP1653009 A1 EP 1653009A1
Authority
EP
European Patent Office
Prior art keywords
tooth
channel
tooth holder
feed pipe
holder
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Withdrawn
Application number
EP04077954A
Other languages
German (de)
French (fr)
Inventor
Gerrit Jacobus Pieter Versteeg
Yarno Ketting
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHC Holland lE BV
Original Assignee
IHC Holland NV
IHC Holland lE 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 NV, IHC Holland lE BV filed Critical IHC Holland NV
Priority to EP04077954A priority Critical patent/EP1653009A1/en
Priority to CN200410095141.2A priority patent/CN1766240A/en
Publication of EP1653009A1 publication Critical patent/EP1653009A1/en
Withdrawn legal-status Critical Current

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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
    • E02F3/92—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
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2825—Mountings therefor using adapters

Definitions

  • the invention is related to cutting member for dredging system, e.g. for a drag head, comprising a tooth and a tooth holder, said tooth being provided with a cavity and said tooth holder being provided with a pointed end which tightly fits in said cavity, and a conduit for delivering a water jet near the cutting edge.
  • Such a cutting member is known.
  • bottom material is cut while the dredging system, e.g. a drag head, is moved over the bottom of a body of water.
  • the cut bottom material is collected in the body under the influence of appropriately oriented water jets, and fed to e.g. the hopper of a vessel through a suction tube.
  • the water jets incorporated in the cutting members assist in the cutting operation.
  • the water is fed to the conduits in the cutting member at a certain pressure, which should be higher than the ambient water pressure. These water jets also prevent the intrusion of dirt etc. into the conduit.
  • the cutting teeth are subject to wear, dependent on the intensity of the cutting process. After a certain amount of time, the cutting teeth have to be replaced by fresh teeth. The worn out teeth have to be disconnected from the tooth holders. Also, the conduit in the cutting members has to be disconnected. In practice, it appears that the connection and disconnection process of the conduit leads to problems, such as an improper sealing between the conduit, tooth holder and tooth which means that dirt etc. can enter into the connection zone. This is highly undesirable, as the connection surfaces may become damaged.
  • the object of the invention is to provide cutting member of the type mentioned before in which these problems have been solved.
  • This object is achieved in that the tooth holders have a tooth holder channel and the teeth have a tooth channel, a feed pipe being provided which at one end fits in the tooth holder channel and which at the other end fits in the tooth channel.
  • the flow path for the water is defined by the feed pipe which extends both into the tooth holder as well as into the tooth.
  • the feed pipe can be sealed with respect to the tooth holder channel by means of a sealing system. Furthermore, the feed pipe can be guided with respect to the teeth channel by means of a guiding sleeve.
  • the tooth holder may have a connection surface which is connected to a plenum chamber, a chamber being provided which opens out in said connection surface and which is connected to the tooth holder channel, said plenum chamber having feed openings which opens out in said tooth holder chamber.
  • the invention is also related to a drag head for a dredging system, comprising a body which at one end comprises connection means for connecting to a suction tube, a visor which is hingeably connected to the body opposite the connection means, at least one row of cutting members according to any of the preceding claims arranged in the visor, which cutting members each comprise a tooth and a tooth holder, said tooth holders being provided with a pointed end and said teeth being provided with a cavity which tightly fits in said cavity, each cutting member comprising a conduit for delivering a water jet near the cutting edge, as well as water supply means connected to the conduit.
  • the tooth holder has a tooth holder channel and the tooth has a tooth channel, a feed pipe being provided which at one end fits in the tooth holder channel and which at the other end fits in the tooth channel.
  • the drag head shown in figures 1 up to 3 comprises a main body 1 at one end of which the mounting flange 2 is mounted. By means of the mounting flange 2, the drag head can be connected to a suction tube and a dredging vessel (not shown). At the other end, the body 1 carries a so called visor 3 through the hinge connection 4. The angle orientation of the visor 3 can be adjusted with respect to the body 1 by means of the hydraulic piston/cylinder devices 5.
  • the visor carries two rows 6, 7 of cutting members 8, each provided with a jet nozzle 36 (other numbers of rows are possible as well). These cutting members are shown on an enlarged scale in figure 5.
  • Each cutting member 8 comprises a cutting tooth 9 as well as a tooth holder 10.
  • the tooth holders 10 have a mounting part 11 by means of which they are connected to a cross bar 12 of each row 7, 8. Furthermore, each tooth 9 has a cavity 14 in which the pointed end 13 of the mounting part 11 is tightly fitted. By means of a pin (not shown) extending through the holder and the tooth, axial displacements are prevented.
  • the tooth holders 10 each have a channel 15 which at one end opens out in a chamber 16 and the other end of which receives a feed pipe 17.
  • the feed pipe 17 is tightly fitted within the tooth holder channel 15 by means of a sealing system 18.
  • the tooth 9 has a tooth channel 19, which has a somewhat curved shape and into which a correspondingly curved section of the feed pipe 17 extends as well.
  • the feed pipe 17 is guided with respect to the tooth channel 19 by means of a guiding sleeve 20.
  • each tooth holder chamber 16 of each tooth holder 10 is in communication with a feed opening 21 in the cross bars 12.
  • These cross bars each delimit a plenum chamber 22, which plenum chambers 22 are fed with pressurized water by means of the respective feed lines 23, 24.
  • These feed lines 23, 24 are each connected to a manifold 25 which in turn, by means of supply tube 26, is supplied with pressurized water.
  • jet nozzles 28 are connected to the body 1, which jet nozzles 28 are in communication with the supply pipe 26 as well through plenum chamber 27.
  • Figure 6 shows the general orientation of the drag head according to the invention with respect to the bottom 29 of a water body during a cutting operation.
  • the visor 3 is oriented with respect to the body 1 through the piston/cylinder devices 5 in such a way that the teeth have their cutting ends 30 slightly oriented downwards; in such a way that the water jets 30 delivered from the cutting teeth 8 are oriented slightly upwardly. Additional water flows are delivered by the jet nozzles 28, 31 and 32, for urging the cut bottom material to the body 1 and the suction tube.
  • the cutting member according to the invention is applicable in a wide variety of dredging systems such as with a cutting head, with buckets etc.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

A cutting member (8) for dredging system, e.g. for a drag head, comprising a tooth (9) and a tooth holder (10), said tooth (9) being provided with a cavity (14) and said tooth holder (10) being provided with a pointed end (13) which tightly fits in said cavity (14), and a conduit (15-20) for delivering a water jet near the cutting edge (30). The tooth holder (10) has a tooth holder channel (15) and the tooth (9) has a tooth channel (19), a feed pipe (17) being provided which at one end fits in the tooth holder channel (15) and which at the other end fits in the tooth channel (19).

Description

  • The invention is related to cutting member for dredging system, e.g. for a drag head, comprising a tooth and a tooth holder, said tooth being provided with a cavity and said tooth holder being provided with a pointed end which tightly fits in said cavity, and a conduit for delivering a water jet near the cutting edge.
  • Such a cutting member is known. By means of such cutting members, bottom material is cut while the dredging system, e.g. a drag head, is moved over the bottom of a body of water. The cut bottom material is collected in the body under the influence of appropriately oriented water jets, and fed to e.g. the hopper of a vessel through a suction tube.
  • Furthermore, the water jets incorporated in the cutting members assist in the cutting operation. The water is fed to the conduits in the cutting member at a certain pressure, which should be higher than the ambient water pressure. These water jets also prevent the intrusion of dirt etc. into the conduit.
  • The cutting teeth are subject to wear, dependent on the intensity of the cutting process. After a certain amount of time, the cutting teeth have to be replaced by fresh teeth. The worn out teeth have to be disconnected from the tooth holders. Also, the conduit in the cutting members has to be disconnected. In practice, it appears that the connection and disconnection process of the conduit leads to problems, such as an improper sealing between the conduit, tooth holder and tooth which means that dirt etc. can enter into the connection zone. This is highly undesirable, as the connection surfaces may become damaged.
  • The object of the invention is to provide cutting member of the type mentioned before in which these problems have been solved. This object is achieved in that the tooth holders have a tooth holder channel and the teeth have a tooth channel, a feed pipe being provided which at one end fits in the tooth holder channel and which at the other end fits in the tooth channel.
  • In the cutting member according to the invention, the flow path for the water is defined by the feed pipe which extends both into the tooth holder as well as into the tooth. Thus, it is not necessary to seal the tooth and the tooth holder at their facing surfaces. Thereby, a more simple connecting and disconnecting process of the tooth and the tooth holder is possible. Also, a better sealing can be obtained.
  • In this connection, the feed pipe can be sealed with respect to the tooth holder channel by means of a sealing system. Furthermore, the feed pipe can be guided with respect to the teeth channel by means of a guiding sleeve.
  • Additionally the tooth holder may have a connection surface which is connected to a plenum chamber, a chamber being provided which opens out in said connection surface and which is connected to the tooth holder channel, said plenum chamber having feed openings which opens out in said tooth holder chamber.
  • The invention is also related to a drag head for a dredging system, comprising a body which at one end comprises connection means for connecting to a suction tube, a visor which is hingeably connected to the body opposite the connection means, at least one row of cutting members according to any of the preceding claims arranged in the visor, which cutting members each comprise a tooth and a tooth holder, said tooth holders being provided with a pointed end and said teeth being provided with a cavity which tightly fits in said cavity, each cutting member comprising a conduit for delivering a water jet near the cutting edge, as well as water supply means connected to the conduit.
  • According to the invention, the tooth holder has a tooth holder channel and the tooth has a tooth channel, a feed pipe being provided which at one end fits in the tooth holder channel and which at the other end fits in the tooth channel.
  • The invention will now be explained further with reference to a cutting member incorporated in a drag head as shown in the figures.
    • Figure 1 shows a view in perspective of the drag head.
    • Figure 2 shows a front view of the drag head.
    • Figure 3 shows a side view of the drag head.
    • Figure 4 shows a cross section according to IV - IV of figure 2.
    • Figure 5 shows an enlarged cross section according to V ― V of figure 2 of a tooth incorporated in the drag head.
    • Figure 6 shows a cross section through the drag head similar to the cross section shown in figure 4, in operation.
  • The drag head shown in figures 1 up to 3 comprises a main body 1 at one end of which the mounting flange 2 is mounted. By means of the mounting flange 2, the drag head can be connected to a suction tube and a dredging vessel (not shown). At the other end, the body 1 carries a so called visor 3 through the hinge connection 4. The angle orientation of the visor 3 can be adjusted with respect to the body 1 by means of the hydraulic piston/cylinder devices 5.
  • The visor carries two rows 6, 7 of cutting members 8, each provided with a jet nozzle 36 (other numbers of rows are possible as well). These cutting members are shown on an enlarged scale in figure 5. Each cutting member 8 comprises a cutting tooth 9 as well as a tooth holder 10. The tooth holders 10 have a mounting part 11 by means of which they are connected to a cross bar 12 of each row 7, 8. Furthermore, each tooth 9 has a cavity 14 in which the pointed end 13 of the mounting part 11 is tightly fitted. By means of a pin (not shown) extending through the holder and the tooth, axial displacements are prevented.
  • The tooth holders 10 each have a channel 15 which at one end opens out in a chamber 16 and the other end of which receives a feed pipe 17. The feed pipe 17 is tightly fitted within the tooth holder channel 15 by means of a sealing system 18. Furthermore, the tooth 9 has a tooth channel 19, which has a somewhat curved shape and into which a correspondingly curved section of the feed pipe 17 extends as well. At its free end, the feed pipe 17 is guided with respect to the tooth channel 19 by means of a guiding sleeve 20.
  • As shown in figure 4, the tooth holder chamber 16 of each tooth holder 10 is in communication with a feed opening 21 in the cross bars 12. These cross bars each delimit a plenum chamber 22, which plenum chambers 22 are fed with pressurized water by means of the respective feed lines 23, 24. These feed lines 23, 24 are each connected to a manifold 25 which in turn, by means of supply tube 26, is supplied with pressurized water.
  • Furthermore, jet nozzles 28 are connected to the body 1, which jet nozzles 28 are in communication with the supply pipe 26 as well through plenum chamber 27.
  • Figure 6 shows the general orientation of the drag head according to the invention with respect to the bottom 29 of a water body during a cutting operation. The visor 3 is oriented with respect to the body 1 through the piston/cylinder devices 5 in such a way that the teeth have their cutting ends 30 slightly oriented downwards; in such a way that the water jets 30 delivered from the cutting teeth 8 are oriented slightly upwardly. Additional water flows are delivered by the jet nozzles 28, 31 and 32, for urging the cut bottom material to the body 1 and the suction tube.
  • Although reference has been made to a drag head, the cutting member according to the invention is applicable in a wide variety of dredging systems such as with a cutting head, with buckets etc.

Claims (9)

  1. Cutting member (8) for dredging system, e.g. for a drag head, comprising a tooth (9) and a tooth holder (10), said tooth (9) being provided with a cavity (14) and said tooth holder (10) being provided with a pointed end (13) which tightly fits in said cavity (14), and a conduit (15-20) for delivering a water jet near the cutting edge (30), characterised in that the tooth holder (10) has a tooth holder channel (15) and the tooth (9) has a tooth channel (19), a feed pipe (17) being provided which at one end fits in the tooth holder channel (15) and which at the other end fits in the tooth channel (19).
  2. Cutting member according to claim 1, wherein the tooth holder channel (19) and the feed pipe (17) are correspondingly curved.
  3. Cutting member according to claim 1 or 2, wherein the feed pipe (17) is sealed with respect to the tooth holder channel (15) by means of a sealing systems (18).
  4. Cutting member (8) according to any of the preceding claims, wherein the feed pipe (17) is guided with respect to the tooth channel (19) by means of a guiding sleeve (20).
  5. Drag head for a dredging system, comprising a body (1) which at one end comprises connection means (2) for connecting to a suction tube, a visor (3) which is hingeably connected to the body (1) opposite the connection means (2), at least one row of cutting members (8) according to any of the preceding claims arranged in the visor (3), which cutting members each comprise a tooth (9) and a tooth holder (10), said tooth holders (10) being provided with a pointed end (13) and said teeth (9) being provided with a cavity (14) which tightly fits in said cavity (14), each cutting member (8) comprising a conduit (15-20) for delivering a water jet near the cutting edge (30), as well as water supply means (26) connected to the conduit (15-20), wherein the tooth holders (10) have a tooth holder channel (15) and the teeth (9) have a tooth channel (19), a feed pipe (17) being provided which at one end fits in the tooth holder channel (15) and which at the the other end fits in the tooth channel (19).
  6. Drag head according to claim 5, wherein the tooth holder channel (19) and the feed pipe (17) are correspondingly curved.
  7. Drag head according to claim 5 or 6, wherein the feed pipe (17) is sealed with respect to the tooth holder channel (15) by means of a sealing system (18).
  8. Drag head according to any of the claims 5-7, wherein the feed pipe (17) is guided with respect to the teeth channel (19) by means of a guiding sleeve (20).
  9. Drag head according to any of the claims 5-8, wherein the tooth holder (10) has a connection surface which is connected to a plenum chamber (22), a chamber (16) being provided which opens out in said connection surface and which is connected to the tooth holder channel (15), said plenum chamber having a feed opening (21) which opens out in said tooth holder chamber (16).
EP04077954A 2004-10-26 2004-10-26 Cutting member for a dredging system Withdrawn EP1653009A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04077954A EP1653009A1 (en) 2004-10-26 2004-10-26 Cutting member for a dredging system
CN200410095141.2A CN1766240A (en) 2004-10-26 2004-10-26 Cutting member of mud digging system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP04077954A EP1653009A1 (en) 2004-10-26 2004-10-26 Cutting member for a dredging system
CN200410095141.2A CN1766240A (en) 2004-10-26 2004-10-26 Cutting member of mud digging system

Publications (1)

Publication Number Publication Date
EP1653009A1 true EP1653009A1 (en) 2006-05-03

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ID=34928608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04077954A Withdrawn EP1653009A1 (en) 2004-10-26 2004-10-26 Cutting member for a dredging system

Country Status (2)

Country Link
EP (1) EP1653009A1 (en)
CN (1) CN1766240A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939362A1 (en) * 2006-12-27 2008-07-02 Caterpillar Work Tools B. V. Work tool having a releasable tooth
NL2007072C2 (en) * 2011-07-08 2013-01-09 Ihc Holland Ie Bv Drag head and trailing suction hopper dredger.
NL2007488C2 (en) * 2011-09-28 2013-04-02 Ihc Holland Ie Bv Cutting device.
CN108203999A (en) * 2018-02-14 2018-06-26 中交天航港湾建设工程有限公司 A kind of dredging drag head single side bath vomerine tooth

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488758A (en) * 1980-11-24 1984-12-18 Padley & Venables Limited Pick and the combination of a pick and holder
DE3512990C1 (en) * 1985-04-11 1986-02-27 Krampe & Co Fertigung in Bergbaubedarf GmbH, Zweigniederlassung Pelkum, 4700 Hamm Pick with a spray-liquid feed channel passing through it to a spray nozzle
US4624505A (en) * 1984-01-19 1986-11-25 Santrade Ltd. Mineral cutter picks and pick assemblies
US4652056A (en) * 1984-05-04 1987-03-24 Minnovation Limited Mineral cutting device
DE3543016A1 (en) * 1985-12-05 1987-06-11 Bergwerksverband Gmbh Interchangeable winning tool
US6449883B1 (en) * 1998-02-13 2002-09-17 Dredging International B.V. Method and device for dredging underwater ground layers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488758A (en) * 1980-11-24 1984-12-18 Padley & Venables Limited Pick and the combination of a pick and holder
US4624505A (en) * 1984-01-19 1986-11-25 Santrade Ltd. Mineral cutter picks and pick assemblies
US4652056A (en) * 1984-05-04 1987-03-24 Minnovation Limited Mineral cutting device
DE3512990C1 (en) * 1985-04-11 1986-02-27 Krampe & Co Fertigung in Bergbaubedarf GmbH, Zweigniederlassung Pelkum, 4700 Hamm Pick with a spray-liquid feed channel passing through it to a spray nozzle
DE3543016A1 (en) * 1985-12-05 1987-06-11 Bergwerksverband Gmbh Interchangeable winning tool
US6449883B1 (en) * 1998-02-13 2002-09-17 Dredging International B.V. Method and device for dredging underwater ground layers

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939362A1 (en) * 2006-12-27 2008-07-02 Caterpillar Work Tools B. V. Work tool having a releasable tooth
WO2008079005A2 (en) * 2006-12-27 2008-07-03 Caterpillar Work Tools B.V. Work tool having a releasable tooth
WO2008079005A3 (en) * 2006-12-27 2008-10-02 Caterpillar Work Tools Bv Work tool having a releasable tooth
NL2007072C2 (en) * 2011-07-08 2013-01-09 Ihc Holland Ie Bv Drag head and trailing suction hopper dredger.
WO2013009172A1 (en) 2011-07-08 2013-01-17 Ihc Holland Ie B.V. Drag head and trailing suction hopper dredger
CN103781968A (en) * 2011-07-08 2014-05-07 Ihc荷兰Ie有限公司 Drag head and trailing suction hopper dredger
US20140190044A1 (en) * 2011-07-08 2014-07-10 Ihc Holland Ie B.V. Drag head and trailing suction hopper dredger
US9222238B2 (en) 2011-07-08 2015-12-29 Ihc Holland Ie B.V. Drag head and trailing suction hopper dredger
CN103781968B (en) * 2011-07-08 2016-09-07 Ihc荷兰Ie有限公司 Drag head and rake suction dredger
NL2007488C2 (en) * 2011-09-28 2013-04-02 Ihc Holland Ie Bv Cutting device.
WO2013048241A1 (en) 2011-09-28 2013-04-04 Ihc Holland Ie B.V. Cutting device for an underwater excavation system
CN108203999A (en) * 2018-02-14 2018-06-26 中交天航港湾建设工程有限公司 A kind of dredging drag head single side bath vomerine tooth

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