US3756659A - Suction dredging installation - Google Patents

Suction dredging installation Download PDF

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Publication number
US3756659A
US3756659A US00765421A US3756659DA US3756659A US 3756659 A US3756659 A US 3756659A US 00765421 A US00765421 A US 00765421A US 3756659D A US3756659D A US 3756659DA US 3756659 A US3756659 A US 3756659A
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US
United States
Prior art keywords
suction
pipe
throat
sliding
flow section
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
US00765421A
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English (en)
Inventor
Koning J De
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.)
N V Ingenieursbureau Voor Systemen En Octrooien Spanstaal nl
SPANSTAAL
Original Assignee
SPANSTAAL
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 SPANSTAAL filed Critical SPANSTAAL
Application granted granted Critical
Publication of US3756659A publication Critical patent/US3756659A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02F3/9243—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
    • E02F3/9293—Component parts of suction heads, e.g. edges, strainers for preventing the entry of stones or the like

Definitions

  • the invention relates to a suction dredging installation, comprising a suction pipe which is connected to a pump and which has a suction mouth at its end and a throat between the pump and the suction mouth, in which the nominal flow section of the suction pipe has substantially a same value from the throat to the pump, whereas the flow section of the suction mouth is larger than said nominal flow section.
  • the invention improves the afore-mentioned known suction dredging installation by the part of the suction pipe with the nominal flow section at the location of the FIG. 4 shows only the lower member of a suction pipe 33, which member is pivotally connected in a known way to a top member of this suction pipe 33, which top member is pivotably suspended from a suction dredging installation.
  • the lower member of the suction pipe 33 mainly consists of an inner pipe 34 which is connected via the top member to a sand pump not shown and disposed, for instance, 10 m below the water-level, a jacket 35 which encloses the inner pipe 34 and is rigidly connected thereto, and a sliding pipe 37 which is mounted axially, slidably in the inner pipe 34, is driven by means of three hydraulic cylinders 36 and which has substantially about the same nominal flow section as the inner pipe 34.
  • the sliding pipe 37 has at its lower end a pipe portion 42 of considerably larger flow section. This pipe portion 42 bears a strainer 38.
  • the pipe portion 42 is lengthened at the end remote from the strainer 38 by a guide pipe 43 of the same diameter.
  • This guide pipe 43 and therefore the pipe portion 42 is connected by radial butt straps 53 to portion 54 of the sliding pipe 37.
  • This portion 54 has at the lower end a radial collar 55 which leaves free an annular gap 52 between itself and the pipe portion 42.
  • the guide pipe 43 has an axial sliding fit in the throat being provided with a collar which extends radijacket end 39. Disposed between the lower end of the ally outwards and by the part of the suction pipe extending from the suction mouth to the throat having substantially the large flow section of the suction mouth. As a result of the thus formed throat the resistance losses are minimal, owing to a supporting vortex which arises before the throat. Producing the throat with the edge extending radially outwards is less expensive than producing a throat converging gradually.
  • FIG. 1 shows a longitudinal section of a suction pipe for a suction dredging installation according to the invention
  • FIGS. 2 and 3 show sections taken along the lines Il--II AND III-III of FIG. 1 respectively
  • FIG. 4 shows a view of a partly cut-away lower member of a preferred embodiment of such a suction pipe and FIG. 5 shows on a larger scale the detail V of FIG. 4.
  • FIG. 1 shows only .a lower part of a suction pipe 1 of a suction dredging installation.
  • the suction pipe 1 mainly consists of a pipe portion 5 with a nominal flow section A which pipe portion 5 is connected to a pump not shown, a radial collar 6 attached to the lower end of the pipe portion 5 and a pipe portion 7 connected to the collar 6, said pipe portion 7 having a flow section B which is considerably larger than the nominal flow section A.
  • a suction mouth 3 with the flow section B is provided at the lower end of the pipe portion 7 .
  • a throat 2 is formed between the-pipe portions 5 and 7, above which throat 2 the suction pipe 1 has a same nominal flow section A up to the pump and under which throat 2 the suction pipe 1 has a considerably larger flow section B extending from the suction mouth 3 (FIG. 2 and 3).
  • portion 54 of the sliding pipe 37 and the guide pipe 43 is a cylindrical space 45 connected at its top end to a cylindrical space 46 between the jacket 35 on the one hand and the sliding pipe 37 and the inner pipe 34 on the other, which latter space 46 is connected to a supply 47 of water under pressure connected to a pump, delivering water under regulatable pressure.
  • the water under'pressure can emerge from the space 46 through the gap 52 into the pipe portion 42.
  • the pipe portion 42 is connected to the portion 54 of the sliding pipe 37 via a throat 51. In connection with the making a hole in the sand the jacket end 39 of the suction pipe 33 has a sharp lower edge 40.
  • the supporting vortex 60 drives the water emerging from the annular gap 52" round itself into the portion 54 of the sliding pipe 37. In this way the water flow from the gap 52 and the sand flow which enters through the suction mouth and the strainer 38, are guided into the portion 54 without much flow resistance.
  • Suction dredging installation comprising a suction pipe which is connected to a pump and which has a suction opening at its end and a throat between the pump and the suction opening, in which the nominal flow se'ction of the suction pipe has substantially a same value from the throat to the pump, whereas the flow section of the suction opening is larger than said nominal flow section, characterised in that the part of the suction pipe with the nominal flow section at the location of the throat.
  • a collar which extends radially outwards, and in that the part of said suction pipe, extending from the suction opening to the throat, has substantially said large flow section of the suction opening said part of the suction pipe with nominal flow section being eclosed by a water pipe which has the same diameter as the part of the suction pipe extending under the throat and which is connected via an annular gap along the outer edge of the collar to the part of the suction pipe extending under the throat.
  • Suction dredging installation characterised in that at least one pipe for water under pressure is attached to the sliding pipe, which pipe for water under pressure communicates at its lower end via the annular gap with the suction pipe.
  • Suction dredging installation comprising a suction pipe which is connected to a pump and which has a suction opening at its end and a throat between the pump and the suction opening, in which the nominal flow section of the suction pipe has substantially a same value from the throat to the pump, whereas the flow section of the suction opening is larger than said nominal flow section, characterised in that the part of the suction pipe with the nominal flow section at the location of the throat is provided with a collar which extends radially outward, and in that the part of said suction pipe, extending from the suction opening to the throat, has substantially said large flow section of the suction opening the suction pipe comprising an inner pipe, a sliding pipe disposed at the lower end of the inner pipe and telescopically co-operating therewith, a jacket enclosing the inner pipe and the sliding pipe and drive means for driving the sliding pipe, the sliding pipe having at its lower end the throat.
  • suction pipe means presenting a suction mouth and adapted to be connected at its upper end to a suction pump so as to induct a mixture of sand and water through said suction mouth, said suction pipe means also presenting a throat between said upper end thereof and said suction mouth, said suction pipe means being of substantially uniform crosssectional area upwardly from said throat and being of substantially uniform but larger cross-sectional area from said suction mouth to said throat whereby to present an abrupt cross-sectional area reduction at said throat;
  • suction pipe means includes an upper pipe section and a sliding pipe section extensible below the upper pipe section and presenting said throat at its lower extremity, an enlarged pipe portion fixed to said sliding pipe section and enclosing said lower extremity so as to project above and below said throat and presenting an annular passage for secondary water between the sliding pipe section and said enlarged pipe portion above said throat, a radially outwardly projecting collar fixed to said lower extremity of said sliding pipe section around said throat and defining opening means between it and said enlarged pipe section in surrounding relation to said throat, said collar defining said abrupt cross-sectional area reduction at said throat, and said annular passage and opening means forming part of said means for introducing secondary water.
  • suction pipe means also includes a jacket for secondary water surrounding said sliding pipe section and having a reduced tubular lower end portion aligned therewith and presenting said suction mouth, said enlarged pipe portion being dimensioned for close sliding fit within said reduced tubular lower end portion.
  • said means for introducing secondary water includes conduit means for introducing secondary water under pressure into said jacket.
  • sliding pipe adapted to be connected to a suction pump, said sliding pipe having a cross-sectional area substantially smaller than the cross-sectional area of said tubular lower end portion of said jacket and defining a throat at its lower extremity;
  • suction pipe means having an open lower end presenting a suction mouth and adapted to be connected at its upper end to a suction pump so as to induct a mixture of sand and water through said suction mouth, said suction pipe means also presenting a throat between said upper end thereof and said suction mouth, said suction pipe means being of substantially uniform cross-sectional area upwardly from said throat and being of substantially uniform but larger cross-sectional area from said suction mouth to said throat;

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
US00765421A 1967-10-16 1968-10-07 Suction dredging installation Expired - Lifetime US3756659A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6714009A NL6714009A (da) 1967-10-16 1967-10-16

Publications (1)

Publication Number Publication Date
US3756659A true US3756659A (en) 1973-09-04

Family

ID=19801459

Family Applications (2)

Application Number Title Priority Date Filing Date
US00765421A Expired - Lifetime US3756659A (en) 1967-10-16 1968-10-07 Suction dredging installation
US765420A Expired - Lifetime US3585739A (en) 1967-10-16 1968-10-07 Method and suction dredging installation for obtaining sand

Family Applications After (1)

Application Number Title Priority Date Filing Date
US765420A Expired - Lifetime US3585739A (en) 1967-10-16 1968-10-07 Method and suction dredging installation for obtaining sand

Country Status (7)

Country Link
US (2) US3756659A (da)
BE (2) BE722326A (da)
DE (1) DE1802153C3 (da)
DK (2) DK118599B (da)
FR (2) FR1587518A (da)
GB (2) GB1243065A (da)
NL (1) NL6714009A (da)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020573A (en) * 1974-02-25 1977-05-03 Ballast-Nedam Group N.V. Method and device for sucking up a solid substance from a stock
US4470208A (en) * 1981-10-22 1984-09-11 Hendrikus Van Berk Dredge with adjustable bottom support for suction pipe and method
US4995175A (en) * 1987-04-28 1991-02-26 Johann Winter Pneumatic extraction head
US5037246A (en) * 1988-11-30 1991-08-06 Eisai Co., Ltd. Pneumatic conveyor for grainy material and suction nozzle for use in such conveyor

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3005669A1 (de) * 1980-02-15 1981-10-01 Schüttgutfördertechnik AG, 9009 St. Gallen Vorrichtung zum foerdern von schuettfaehigem gut, insbesondere unter wasser lagerndem sand, kies o.dgl.
DE19718868A1 (de) * 1997-05-03 1998-11-05 Rinker Karl Dipl Ing Fh Saugbagger
AU2002351426A1 (en) * 2001-11-22 2003-06-10 Graham Albrecht Submerged gravel collection device
NO318582B1 (no) * 2001-12-21 2005-04-11 Gto Subsea As Sugehode for mudring
ES2221771B1 (es) * 2002-04-23 2006-10-01 Ecodragados, S.L. Procedimiento y equipo de dragado.
NL1022832C2 (nl) * 2003-02-20 2004-08-23 Bos & Kalis Baggermaatsch Baggerinrichting en -werkwijze.
US7351004B2 (en) * 2006-07-19 2008-04-01 Shaw & Sons, Inc. Aquifer replenishment system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US661609A (en) * 1897-03-05 1900-11-13 Frank K Hoover Dredging-machine.
GB190827674A (en) * 1908-12-19 1909-05-06 Jan Van Rede Improvements in Suction-nozzles for Pneumatic Conveyors.
US1918330A (en) * 1931-07-28 1933-07-18 Green Sherwood Unloading system
US3301606A (en) * 1966-06-23 1967-01-31 Anthony I Bruno Cyclonic elevator
US3438678A (en) * 1966-08-11 1969-04-15 Alpine Geophysical Associates Method and apparatus for conveying materials

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US336619A (en) * 1886-02-23 Apparatus
US1758047A (en) * 1927-05-06 1930-05-13 Jensen Danes Mining or dredging plant
US1861349A (en) * 1929-06-08 1932-05-31 A M Lockett & Company Ltd Dredge
US2774569A (en) * 1954-04-05 1956-12-18 Karl Oscar F Jacobsen Earth moving hydraulic suction nozzles
GB837669A (en) * 1958-12-05 1960-06-15 Blankevoort En Zoon N V D A method and apparatus for suction dredging
US3163241A (en) * 1961-12-20 1964-12-29 Shell Oil Co Core sample taking
US3153290A (en) * 1962-01-30 1964-10-20 Asia Dredging Co Ltd Apparatus for subaqueous excavations
NL6501405A (da) * 1965-02-04 1966-08-05
NL6501404A (da) * 1965-02-04 1966-08-05
NL6604227A (da) * 1966-03-30 1967-10-02

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US661609A (en) * 1897-03-05 1900-11-13 Frank K Hoover Dredging-machine.
GB190827674A (en) * 1908-12-19 1909-05-06 Jan Van Rede Improvements in Suction-nozzles for Pneumatic Conveyors.
US1918330A (en) * 1931-07-28 1933-07-18 Green Sherwood Unloading system
US3301606A (en) * 1966-06-23 1967-01-31 Anthony I Bruno Cyclonic elevator
US3438678A (en) * 1966-08-11 1969-04-15 Alpine Geophysical Associates Method and apparatus for conveying materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020573A (en) * 1974-02-25 1977-05-03 Ballast-Nedam Group N.V. Method and device for sucking up a solid substance from a stock
US4470208A (en) * 1981-10-22 1984-09-11 Hendrikus Van Berk Dredge with adjustable bottom support for suction pipe and method
US4995175A (en) * 1987-04-28 1991-02-26 Johann Winter Pneumatic extraction head
US5037246A (en) * 1988-11-30 1991-08-06 Eisai Co., Ltd. Pneumatic conveyor for grainy material and suction nozzle for use in such conveyor

Also Published As

Publication number Publication date
DE1802153B2 (de) 1974-02-21
GB1243065A (en) 1971-08-18
FR1587519A (da) 1970-03-20
DK132840B (da) 1976-02-16
DK118599B (da) 1970-09-07
DE1802153A1 (de) 1969-06-19
FR1587518A (da) 1970-03-20
BE722326A (da) 1969-04-15
DE1802153C3 (de) 1974-09-26
DE1802157A1 (de) 1969-06-12
DK132840C (da) 1976-07-12
US3585739A (en) 1971-06-22
BE722327A (da) 1969-04-15
NL6714009A (da) 1969-04-18
GB1243066A (en) 1971-08-18

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