US3748760A - Dredging machinery with swinging double ended scoop - Google Patents

Dredging machinery with swinging double ended scoop Download PDF

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Publication number
US3748760A
US3748760A US00207923A US3748760DA US3748760A US 3748760 A US3748760 A US 3748760A US 00207923 A US00207923 A US 00207923A US 3748760D A US3748760D A US 3748760DA US 3748760 A US3748760 A US 3748760A
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US
United States
Prior art keywords
housing
scoop
discharge line
dredging
openings
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.)
Expired - Lifetime
Application number
US00207923A
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English (en)
Inventor
L Schnell
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SCHUTTGUTFOERDERTECHNIK AG
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SCHUTTGUTFOERDERTECHNIK AG
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Publication of US3748760A publication Critical patent/US3748760A/en
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    • 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
    • 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
    • E02F3/905—Manipulating or supporting suction pipes or ladders; Mechanical supports or floaters therefor; pipe joints for suction pipes

Definitions

  • a floating dredge has a downwardly extending discharge line terminating in a double ended scoop, with the discharge line being supported at its upper end for bi-directional swinging movement of the scoop; the scoop having a pivoted double ended scraper blade which alternatively opens one end of the scoop while closing the other.
  • the present invention relates to machinery for dredg ing sand, gravel, or other similar loose materials from underwater bottoms, and generally comprises a horizontally reciprocatingly movable dredging scoop attached to the lower end of a discharge line which is sup ported at its upper end by an articulated joint attached to a floating structure.
  • the assembly also includes a line for conducting pressurized fluid, such as air or" water to the lower end of the discharge line for conveying materials upwardly to the surface.
  • This object is accomplished by providing a downwardly depending discharge line having a scoop at its lower end which can be reciprocatingly moved in a horizontal path to provide a scrapingaction on the material to be removed.
  • the scoop furthermore, is provided with oppositely disposed openings and a double ended pivotal scraping blade which is operable to alternatively uncover the opening facing the direction of movement while simultaneously closing the opposite one.
  • a further feature of the invention consists in the fact that the upper end of the discharge line is secured to a stationary support on the floating structure by means of a ball bearing journalled support with the material being discharged from the line by a right angled elbow pipe.
  • FIG. 1 is a view in elevation of a preferred form of a device according to the invention, for dredging sand, gravel or other similar loose materials;
  • FIG. 2 is a detail view, partly in section and on an enlarged scale, of the scoop shown in FIG. 1;
  • FIG. 3 is an end view of the scoop taken from the left for dredging sand, gravel or other similar loose materi als is generally indicated by numeral 10.
  • This device comprises a floating raft like vessel 12, preferably formed by a pair of parallel pontoons 14 joined to each 'other by transverse connecting pontoons 16 indicated by dotted lines. That portion of the raft towards the left in FIG. I is left open to permit entry of a barge or other means for carrying away material discharged.
  • baffle tank 18 Approximately at the middle of the raft 12 a baffle tank 18 is provided into which the loose material removed by a scoop is fed through a discharge line 20. The material, such as gravel, sand or the like, is conveyed from this baffle tank to a drainage chute 22. The drained material is then transported, for example, to a storage place located ashore by means of conveyor belts, barges, or the like (not shown).
  • Two lifting jacks 24 and 26 are mounted on the vessel 12 at the left and at the right of the baffle tank 18, respectively, and at approximately the same distance therefrom. Each one of these lifting jacks is provided with a motor-driven winch 28 and 80, respectively, and cables 32 and 34, whose free endsare secured to a scoop 36, are rolled around these winches. The lifting jacks also serve to assist in securing the two ontoons 14 to each other. I
  • a feed line 38 is provided to convey a pressurized medium, for example water or pressurized air, to the scoop 36.
  • a pressurized medium for example water or pressurized air
  • the pressurized water fed into line 38 is obtained directly from the river or the lake by means of an intake 40, and is conveyed to the scoop 36 by a pressure pump 42 mounted on the battle tank 18.
  • FIGS. 2 to 4 the scoop 36 is shown on an enlarged scale.
  • the discharge line 20 is connected to a housing 44 of the scoop 36, which has for example the shape of a truncated pyramid and is provided at its lower end with an inlet 46 opposite to the discharge line 20.
  • This inlet comprises a double-ended scraping blade 48 provided at its opposite ends with teeth 59 (FIG. 3).
  • scraping blade 48 is rotatably mounted in the center of the lower portion of the housing 44 and is provided.
  • the two narrow sides ofthehousing 44 are provided with openings 49 and 51 adapted to receive the respective ends of the reciprocating scraping blade 48. Further, the scraping blade 48 is also guided in its reciprocating movement by means of the two arms 52 which move between guide blocks 54 located above the side openings 49 and 51.
  • the scraping blade 48 is rotatably mounted on a conduit 58, connected with the feed line 38 for pressurized medium, by means of a hollow shaft 56.
  • the conduit 58 is provided with an upwardly directed opening 60 on the inside of the scoop 36 to prevent the opening 60 from becoming closed during movement of the scraping blade.
  • the hollow shaft 56 is provided at its upper portion with an opening 62 which is larger than the opening 60 of the conduit 58 so that it is always completely open regardless of the position of the scraping blade 48.
  • Reciprocating movement of the scraping blade 48 is accomplished by the alternative application of force to the cables 32 and 34.
  • These cables lead from the respective winches 28 and 30 and pass downwardly over the outside of rollers 80, mounted at the extremities of pivotally mounted levers 78, and each is connected at its lower free end to a pulley 64.
  • These pulleys carry the medial portion of the respective cable loops 66 and 68.
  • a pair of bell crank levers Connected at the ends of the hollow shaft 56, which projects outwardly of the scoop housing, are a pair of bell crank levers having arms 70 and 72 and the terminal ends of cable loop 66 are connected to arms 70, while the ends of cable loop 68 are connected to arms 72.
  • the arms 70 are outwardly offset so that the spacing between the two arms 70 is larger than between the arms 72. This permits the two cable loops 66 and 68 to cross each other (FIG. 2) without touching and prevents abrasion and wear.
  • the housing 44 of the scoop 36 as well as the lower end of the feed line 38 which is outwardly offset to connect with the inlet conduit 58 at the side of housing 44 are provided with outwardly projecting spikes 74 which contribute to the housing 44. Subsequently the whole scoop 36 will move towards the left as a result of the pulling force of the cable, that is to say, in the direction of the open side opening 49.
  • Theside opening 51 at the right hand side isnoviclosed by the scraping blade 48.
  • the actuating cylinder 76 shown at the right hand side in FIG. 1 is actuated, which causes the cable 34 to be pulled out of the water a certain distance by the lever 78.
  • the cable 32 is released by the actuating cylinder 76 shown at the left hand side in FIG. 1, so that the scraping blade 48 is now rotated clockwise, thus closing the side opening 48 and simultaneously opening the side opening 51 located at the right hand side.
  • the upper surface 45 of the scraping blade 48 As the pulling action of cable 34 increases, the upper surface 45 of the scraping blade 48,
  • the alternating forces applied to the cables 32 and '34 which causes the reciprocating movement of the scraping blade 48 and also the scoop 36 in a manner which will be described later, is accomplished by respective actuation of cylinders 76, either pneumatically or hydraulically.
  • Each cylinder 76 is connected to a respective lever 78 whose pivotal support is preferably in alignment with the axis of each winch 28 and 30.
  • the free ends of the levers 78 are provided with rollers 80 to act on the cables 32 and 34.
  • the reciprocating movement of the scoop 36 is accomplished by the alternative swinging movement of the levers 78, and thus the drums of the winches 28 and 30-need not necessarily be rotated since their axes are the same as the axes of the levers 78.
  • actuating cylinders 76 which work simultaneously but in opposite directions, a single source of pneumatic or hydraulic fluid under pressure is sufficient to actuate both cylinders, such as for example a pressure pump and a suitable arrangement of control valves.
  • the scraping blade 48 keeps turning until its right hand upper surface 47 abuts against the upper edge of the side opening 51 provided at the right'side of the shown in FIG. 2,,abuts against the upper edge of the side opening 49 and closes this opening, so that now the scoop 36 moves towards the right with the side opening 51 open, so that it scrapes the loose material and takes it in. '7
  • the loose material taken into the scoop 36 is conveyed upwards through the discharge line 20 and into the baffle tank '18 mounted on the raft 12. Since the discharge line 20 is rigidly connected to the scoop 36 so that it also swings during the reciprocating movement of the scoop, it is necessary to provide an articulated support at the upper end of the discharge line 20. Such a joint is shown in FIG. 5.
  • the discharge line 20 is flanged to a support frame 86, and an elastic intermediate member 84, which will be described later, is interposed in the discharge line just below this support.
  • the connection between the discharge line 20 and thebaffle tank is accomplished by means of an elbow 88 which is also flanged to the support frame 86.
  • This support frame 86 which is rigidly connected to the discharge line 20 is pivoted to a support structure 94 by means of two ball-bearing journals 90 and 92.
  • the supportstructure can be rigidly connected to the baffle tank 18 or else be movable vertically on the tank framework by means of a motordriven block and tackle arrangement 96, schematically indicated in FIG. 1.
  • This up and down movement of the support structure 94 and, consequently, of the support frame 86, makes it possible to vary the depth of the scoop 36 connectedto the discharge line 20 and has the advantage that the scoop can easily be pulled up out of any pit which might be caused by the dredging r I operation.
  • This upward movement of the scoop can be assisted by simultaneous pulling action on thecables by winches 28 and 30. 1
  • This arrangement permits the discharge line 20 to be reciprocated in both directionsin response to the actuation of the cables.
  • the elastic intermediate portion 84 is provided in the line 20 (FIGS. 5 and 6).
  • This elastic intermediate portion 84 comprises a resilient bellows 100 provided with head flanges 102 arranged at the opposite ends thereof.
  • a pair of intermediate flanges, 108 are provided with brackets which are pivotally connected togetheratl-l0 andthese two flanges are respectively interposed between the two head flanges102 and 104 at the upper end of the bellows, and between flanges 102 and 106 at the lower end of the bellowseBoth flange groups are fixedly secured to each other by means of screws (not shown).
  • the pivotal connection 110 whose axis of rotation is-preferably located in the middle of the bellows 100, is secured to the intermediate flanges 108 for example'by welding.
  • the elastic intennediate bellows portion 84 permits the discharge line 20-to be not only reciprocated in the plane of movement defined by the cables 32 and 34, but also to be-swung transversely out of this plane during the operation of the device, which may benecessary if the scoop. should hit solid, immovable material during operation, suchas a rock which would push the scoop 36 sideways.
  • the plate 95 of the support structure 94 can be pivotedby means of a joint 97, indicated in dotdashed lines in FlG. 5, to a vertical plate 99 which can be moved up anddown along the baffle tank 18.
  • the joint 97- has the same purpose as the elastic intermediate portion 84.
  • Dredging apparatus for removing material from the bottom of a body of water comprising, a vertically disposed discharge line having a dredging scoop housing at the lower endthereof, said housing having a pair of oppositely-disposed intake openings for material to be removed, a double ended scraping blade secured to said housing for movement between a first position to obstruct one of said openings and to clear the other of saidopenings and; a secondposition to clear said one opening and to obstruct said other opening,-feeding means to supply fluid under pressure tothe interior of said housing to convey removed material upwardly through saiddischarge line, and means to reciprocatingly move said dredging scoop housing and discharge line along a path-generally facing said openings in the cable means being divergently spaced away from each other, and means to alternatively apply pullingforce to the respective one ends of the cable means, said scraping blade being secured to the scoop housing for pivotal movement 7 about an axis midway between the ends thereof, said one ends of the cable means being connected with '
  • said mounting for the discharge line includes a support frame pivotally journalled in support structure by ball bearing means, and said support frame also includes an elbow pipe connected with the discharge line to.discharge material at one side thereof.
  • Dredging apparatus for material from the bottom of a body of water comprising, a vertically disposed discharge line having a dredging scoop housingat the lower end thereof, said housing having a pair of oppositely disposed intake openings for material to be removed, a double ended scraping blade secured to said housing for movement between a first position to obstruct one of said openings and to clear the other of said openings and a second position to clear said one opening and to' obstruct said other opening, feeding means to supply fluid under pressure to the interior of said housing to convey removed material upwardly through said discharge line, and means to reciprocatingly move said dredging scoop housing and discharge line along a path generally facing said openings in the housing and to alternatively move said scraping blade between said first and second positions, said means to reciprocatingly move the dredging scoop housing including a pair of cable means connected at their one ends with said scoop housing, the other end of said cable means being divergently spaced away from each other, and means to alternatively apply pulling force to the respective one ends of the cable means
  • Dredging apparatus for removing material from the bottom of a body of water comprising, a vertically disposed discharge line having a dredging scoop housing at the lower end thereof, said housing having a pair of oppositely disposed intake openings for material to be removed, a double ended scraping blade secured to said housing for movement between a first position to obstruct one of said openings and to clear the other of said openings and a second position to clear said one opening and to obstruct said other opening, feeding means to supplyfluid under pressure to the interior of said housing to convey removed material upwardly through said discharge line, and means to reciprocatingly move said dredging scoop housing and discharge line along a path generally facing said openings in the housing and toalternatively move said scraping blade between said first and second positions, said means to reciprocatingly move the dredging scoop housing including a pair of cable means connected at their one ends with said scoop housing, the other ends of said cable means being divergent ly spaced away from each other, and means to alternatively, apply pulling force to the
  • said means to anchor the other ends of said cable means includes a pair of power-actuated winch means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Removal Of Floating Material (AREA)
US00207923A 1970-12-28 1971-12-14 Dredging machinery with swinging double ended scoop Expired - Lifetime US3748760A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702063968 DE2063968A1 (de) 1970-12-28 1970-12-28 Vorrichtung zum Fördern von Sand, Kies oder anderen Schüttgüten

Publications (1)

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US3748760A true US3748760A (en) 1973-07-31

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US00207923A Expired - Lifetime US3748760A (en) 1970-12-28 1971-12-14 Dredging machinery with swinging double ended scoop

Country Status (12)

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US (1) US3748760A (de)
AT (1) AT315068B (de)
BE (1) BE774152A (de)
CA (1) CA958423A (de)
CH (1) CH534629A (de)
DE (1) DE2063968A1 (de)
ES (1) ES397800A1 (de)
FR (1) FR2077138A5 (de)
GB (1) GB1319395A (de)
IT (1) IT941192B (de)
LU (1) LU64279A1 (de)
NL (1) NL7116697A (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994082A (en) * 1974-01-04 1976-11-30 Pneuma International S.A. Air operated dredging apparatus
US4004357A (en) * 1972-03-17 1977-01-25 Giovanni Faldi Two stroke dredging plant
US4058914A (en) * 1975-12-15 1977-11-22 Kiss Sandor G Alternate flow suction dredge
US4094548A (en) * 1973-11-08 1978-06-13 Schuttgutfordertechnik Ag Apparatus for conveying and separating loose material
US4227323A (en) * 1978-01-20 1980-10-14 Twin Harbor Dredging Co. Hydraulic dredge suction diversion flap
US4373276A (en) * 1980-02-15 1983-02-15 Schuttgutfordertechnik Ag Device for conveying a slurry, such as sand or gravel or the like, lying under water
US4398361A (en) * 1979-10-19 1983-08-16 Preussag Aktiengesellschaft Recovery of sediments from the bottom of the sea by suspended suction pipe
US4642919A (en) * 1985-03-01 1987-02-17 Barrett, Haentjens & Co. Submersible sludge removing apparatus
US5179793A (en) * 1989-11-09 1993-01-19 Wolfgang Rohr Floating dredger
US5561922A (en) * 1995-08-22 1996-10-08 Lynch; Robert P. Extrusion dredging apparatus
US5732487A (en) * 1995-03-30 1998-03-31 Dredging International Dredge head for dredging sludge by a trailing or pushing motion
NL1007428C2 (nl) * 1997-11-03 1999-05-04 Ihc Holland Nv Bochtstuk-stelsel zoals voor het verbinden van een zuigbuis met een opening aangebracht in de romp van een hopperzuiger.
US10794040B2 (en) * 2018-05-08 2020-10-06 Jeremy Leonard Autonomous vertically-adjustable dredge
US20220228342A1 (en) * 2019-06-03 2022-07-21 Bartolomeo Mongiardino System for the dradging of underwater sea-beds

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9007609D0 (en) * 1990-04-04 1990-05-30 Translift Freight Limited Improvements relating to dredging methods

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US548242A (en) * 1895-10-22 Dredg ing-machine
US927690A (en) * 1908-12-14 1909-07-13 James W Singleton Dredging-machine.
US1068934A (en) * 1912-08-30 1913-07-29 John Warren Sackett Oscillatory-grating drag.
US1690239A (en) * 1926-04-12 1928-11-06 Nicol John Malcolm Plow and jet-elevator dredge
US2414797A (en) * 1945-02-20 1947-01-28 Asa D Brown Self-cleaning suction head
US2657481A (en) * 1946-09-06 1953-11-03 Russell C Larsen Tractor mounted loading shovel and scoop attachment
US2763940A (en) * 1953-01-26 1956-09-25 Sr Charles George Madgwick Stationary sand dredger
US2995842A (en) * 1957-01-14 1961-08-15 Korste Franz Ground aspirator for inland and deep sea dredging
US3681862A (en) * 1968-11-20 1972-08-08 Ingbureau Voor Systems En Octr Suction dredger having plural pumps and plural articulated pipe sections

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US548242A (en) * 1895-10-22 Dredg ing-machine
US927690A (en) * 1908-12-14 1909-07-13 James W Singleton Dredging-machine.
US1068934A (en) * 1912-08-30 1913-07-29 John Warren Sackett Oscillatory-grating drag.
US1690239A (en) * 1926-04-12 1928-11-06 Nicol John Malcolm Plow and jet-elevator dredge
US2414797A (en) * 1945-02-20 1947-01-28 Asa D Brown Self-cleaning suction head
US2657481A (en) * 1946-09-06 1953-11-03 Russell C Larsen Tractor mounted loading shovel and scoop attachment
US2763940A (en) * 1953-01-26 1956-09-25 Sr Charles George Madgwick Stationary sand dredger
US2995842A (en) * 1957-01-14 1961-08-15 Korste Franz Ground aspirator for inland and deep sea dredging
US3681862A (en) * 1968-11-20 1972-08-08 Ingbureau Voor Systems En Octr Suction dredger having plural pumps and plural articulated pipe sections

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004357A (en) * 1972-03-17 1977-01-25 Giovanni Faldi Two stroke dredging plant
US4094548A (en) * 1973-11-08 1978-06-13 Schuttgutfordertechnik Ag Apparatus for conveying and separating loose material
US3994082A (en) * 1974-01-04 1976-11-30 Pneuma International S.A. Air operated dredging apparatus
US4058914A (en) * 1975-12-15 1977-11-22 Kiss Sandor G Alternate flow suction dredge
US4227323A (en) * 1978-01-20 1980-10-14 Twin Harbor Dredging Co. Hydraulic dredge suction diversion flap
US4398361A (en) * 1979-10-19 1983-08-16 Preussag Aktiengesellschaft Recovery of sediments from the bottom of the sea by suspended suction pipe
US4373276A (en) * 1980-02-15 1983-02-15 Schuttgutfordertechnik Ag Device for conveying a slurry, such as sand or gravel or the like, lying under water
US4642919A (en) * 1985-03-01 1987-02-17 Barrett, Haentjens & Co. Submersible sludge removing apparatus
US5179793A (en) * 1989-11-09 1993-01-19 Wolfgang Rohr Floating dredger
US5732487A (en) * 1995-03-30 1998-03-31 Dredging International Dredge head for dredging sludge by a trailing or pushing motion
US5561922A (en) * 1995-08-22 1996-10-08 Lynch; Robert P. Extrusion dredging apparatus
NL1007428C2 (nl) * 1997-11-03 1999-05-04 Ihc Holland Nv Bochtstuk-stelsel zoals voor het verbinden van een zuigbuis met een opening aangebracht in de romp van een hopperzuiger.
US10794040B2 (en) * 2018-05-08 2020-10-06 Jeremy Leonard Autonomous vertically-adjustable dredge
US20220228342A1 (en) * 2019-06-03 2022-07-21 Bartolomeo Mongiardino System for the dradging of underwater sea-beds

Also Published As

Publication number Publication date
ES397800A1 (es) 1975-05-16
NL7116697A (de) 1972-06-30
FR2077138A5 (de) 1971-10-15
LU64279A1 (de) 1972-06-02
GB1319395A (en) 1973-06-06
BE774152A (fr) 1972-02-14
AT315068B (de) 1974-05-10
DE2063968A1 (de) 1972-07-13
IT941192B (it) 1973-03-01
CA958423A (en) 1974-11-26
CH534629A (de) 1973-03-15

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