[go: up one dir, main page]

US3772805A - Method and suction dredging installation for conveying dredging spoil - Google Patents

Method and suction dredging installation for conveying dredging spoil Download PDF

Info

Publication number
US3772805A
US3772805A US00803915A US3772805DA US3772805A US 3772805 A US3772805 A US 3772805A US 00803915 A US00803915 A US 00803915A US 3772805D A US3772805D A US 3772805DA US 3772805 A US3772805 A US 3772805A
Authority
US
United States
Prior art keywords
pressure difference
suction
pump
suction pipe
dredging
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
US00803915A
Other languages
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.)
ING BUREAU OCTROOIEN SPANSTAAL NL
OCTROOIEN SPANSTAAL ING BUREAU
Original Assignee
OCTROOIEN SPANSTAAL ING BUREAU
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 OCTROOIEN SPANSTAAL ING BUREAU filed Critical OCTROOIEN SPANSTAAL ING BUREAU
Application granted granted Critical
Publication of US3772805A publication Critical patent/US3772805A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • E02F3/907—Measuring or control devices, e.g. control units, detection means or sensors
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S37/00—Excavating
    • Y10S37/906—Visual aids and indicators for excavating tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0324—With control of flow by a condition or characteristic of a fluid
    • Y10T137/0329—Mixing of plural fluids of diverse characteristics or conditions
    • Y10T137/0335—Controlled by consistency of mixture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0324—With control of flow by a condition or characteristic of a fluid
    • Y10T137/0329—Mixing of plural fluids of diverse characteristics or conditions
    • Y10T137/0352—Controlled by pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2499—Mixture condition maintaining or sensing
    • Y10T137/2506—By viscosity or consistency

Definitions

  • the invention relates to a method for conveying dredging spoil through a pipe of a suction dredging installation by means of at least one pump and to a suction dredging installation for the performance of such a method.
  • the invention provides a method, with which during operation the pressure difference between the suction and the pressure side of the pump is picked up.
  • This pressure difference is an important indication about the working condition of the pump. By measuring this pressure difference the pump can be adjusted into its optimum working situation so that the suction dredging installation produces much more. The extent of cavitation of the pump can be confined easily in this way to an admissible limit.
  • the pressure difference provides further a clear information about the efficiency of the conveyance.
  • the time difierential of the pressure difference between the suction and the pressure side of the pump may be used to derive the extent and in which sense the working situation of the pump changes.
  • the pressure difference picked up and/or its differential can be observed by means of an indicator, for example an indicator provided with a scale division.
  • the pressure difference and/or its differential is able to switch on an acoustically or visually observable warning device when exceeding or declining a maximum or minimum value respectively.
  • the pressure difference picked up and/or its differential can be used in particular as input signal of an automatic regulating-apparatus for regulating the dredging process.
  • the invention provides also a new suction dredging installation of the type mentioned which is characterised by a pressure difference pick-up, which picks up the pressure difference between the suction and the pressure side of the pump.
  • FIG. 1 a suction dredging installation according to the invention
  • FIG. 2 a further development of the suction dredging installation of FIG. 1;
  • FIG. 3 a performance variation of the suction dredging installation of FIG. 1
  • FIG. 4 a further developed suction dredging installation according to the invention.
  • the suction dredging installation of FIG. 1 comprises a vessel 1, a pump 2, a pressure conduit 3 connected to the pressure side of the pump 2, a suction pipe 4 connected to the suction side of the pump 2, which suction pipe 4 is suspended swingably around an axis 35 on a lifting device 5, and a measuring device 6 for measuring the pressure difference between the suction and the pressure side of the pump 2.
  • This measuring device 6 consists of a pressure difference pick up 9 having a membrane 12, of which pick up the one chamber 10 is influenced by the pressure in the suction pipe 4 at measuring point 7, which is arranged close before the pump 2, and of which pick up 9 the other chamber 11 is influenced by the pressure in the pressure conduit 3 at measuring point 8, which is arranged close behind the pump 2.
  • the pressure difference pick up 9, which is for example of the known electric type, is connected with a pointer 13 of an indicator 14 with a scale division 15, which indicator 114 is mounted on a control panel of the suction dredging installation.
  • the suction pipe 4 is kept in place to retain the existing concentration of the suspension or is put deeper or less deep into the breach for sucking up a suspension with an equal remaining, respectively to obtain higher and lower concentrations of sand in the suspension.
  • a valve 16 may be opened, by means of which extra water is admitted into the suction pipe 4. At the same time more of less fuel can be supplied to the sump-driving engine (not shown) by adjusting its regulator so as to overcome the condition tending to cause cavitation.
  • the suction dredging installation of FIG. 2 differs from the suction dredging installation of FIG.
  • the pressure difference pick up 9 controls a regulating valve 17 and in that the lower end of the suction pipe 4, which is represented on a larger scale, comprises a sliding pipe 18 telescopically cooperating with the suction pipe 4, a jacket 19 enveloping the lower end of the suction pipe 4 and a hydraulic cylinder 20 which works in both directions and which drives the sliding pipe 18.
  • the suction mouth 21 at the lower end of the jacket 19 is put into the breach during sucking up sand, more or less water can be brought from the upper end of the jacket 19 into the suction pipe 4 by respectively raising and lowering the sliding pipe within the suction pipe 4.
  • the regulating valve 17, which is controlled by the pressure difference pick up 9, regulates the supply and the outlet of the liquid at both sides of the piston of the cylinder 20 and therewith the position of the sliding pipe 18.
  • the suction dredging installation of FIG. 3 comprises besides a pump 2 mounted between a suction pipe 4 and a pressure conduit 3, a pump 22 mounted in the pressure conduit 3 and a pressure difference pick up 27 for picking up the pressure difference between the suction and the pressure side of the second pump 22 on the measuring points 23 and 24 close before and behind the pump 22 respectively.
  • This pressure difference pick 27 consists of two absolute pressure pick ups 25 and 26, which pick up the pressures in the conduit 3 on the measuring points 23 and 24 respectively and of a subtracting circuit 28. The values picked up by these absolute pressure pick ups 25 and 26 are subtracted from each other in the subtracting circuit 2%.
  • the output of the subtracting circuit 28 is connected to an acoustic signaller 29, which starts when a selected maximum or minimum value respectively is attained.
  • the output of the pressure difference pick up 9 is preferably connected to a differentiator 30 of FIG. 4, which differentiates the pressure difference with respect to time.
  • the output of the differentiator 30 is connected to a control light 3i, which lights after a selected maximum or minimum value respectively is attained.
  • the output of the differentiator 30 is furthermore adaptable for controlling various regulating members 32 and 33 of an automatic regulating apparatus for regulating the suction and conveying process.
  • the regulating members 32 and 33 can each be formed by a switch.
  • the regulating member 32 can control, for example, the winches of the side wires of said cutter dredger in order to adjust the velocity of the swinging movement of the driven cutter 34, which is mounted for rotation at the lower end of the suction pipe 4, in such way that the pump 2 can pump the sand cut and sucked up at a constantly high efficiency of the dredger.
  • a suction dredging assembly comprising, in combination;
  • a suction pipe having an open lower end adapted to be projected into a body of underwater material which is to be dredged;
  • supporting structure including means for controlling the position of said lower end of the suction pipe
  • a pump on said supporting structure having an inlet connected to said suction pipe for withdrawing a suspension of said material therethrough, and having an outlet for discharging such suspension, said pump operating to produce a predetermined pressure difi'erence between its outlet and its inlet when at an optimum pumping efficiency;
  • a pressure difference pick-up connected between said outlet and said inlet of the pump and having an output which increases when the pressure difference between said inlet and said outlet deviates to exceed said predetermined pressure difference and vice versa;
  • a suction dredging assembly comprising, in combination;
  • a suction pipe having an open lower end adapted to be projected into a body of underwater material which is to be dredged;
  • supporting structure including means for controlling the position of said lower end of the suction pipe
  • a pump on said supporting structure having an inlet connected to said suction pipe for withdrawing a suspension of said material therethrough, and having an outlet for discharging such suspension, said pump operating to produce a predetermined pressure difference between its outlet and its inlet when at an optimum pumping efficiency; pressure difference pick-up connected between said outlet and said inlet of the pump and having an output proportional to the pressure difference between such outlet and inlet so as to determine both positive and negative pressure difference deviations with respect to said predetermined pressure difference; and
  • suction dredging assembly as defined in claim 2 wherein said means includes differentiator means for differentiating said output of the pressure difference pick-up with respet to time to produce a signal indicative of the rate of pressure difference change.
  • suction dredging assembly as defined in claim 4 wherein said means also includes an indicator connected to the signal of said differentiator means.
  • a method of suction dredging which comprises the steps of:
  • a method according to claim 11 including the step of measuring the time rate of change of the pressure difference, and wherein the controlling of step (c) is in accord with such time rate of change.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
US00803915A 1968-03-06 1969-03-03 Method and suction dredging installation for conveying dredging spoil Expired - Lifetime US3772805A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6803191A NL6803191A (da) 1968-03-06 1968-03-06

Publications (1)

Publication Number Publication Date
US3772805A true US3772805A (en) 1973-11-20

Family

ID=19802954

Family Applications (1)

Application Number Title Priority Date Filing Date
US00803915A Expired - Lifetime US3772805A (en) 1968-03-06 1969-03-03 Method and suction dredging installation for conveying dredging spoil

Country Status (6)

Country Link
US (1) US3772805A (da)
JP (1) JPS4945502B1 (da)
BE (1) BE729247A (da)
FR (1) FR2003368A1 (da)
GB (1) GB1260407A (da)
NL (1) NL6803191A (da)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2520732A1 (de) * 1974-08-29 1976-03-11 Sandbergs N A Ing Firman Verfahren und vorrichtung zur steuerung einer beweglichen saugvorrichtung zum aufsaugen von suspendierbarem material vom boden einer fluessigkeitsansammlung
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
EP0288842A1 (de) * 1987-04-29 1988-11-02 O & K Orenstein & Koppel Aktiengesellschaft Verbindung von auf einem Schiffsrumpf eines Nassbaggers angeordneten Druckluftleitungen mit am Saugrohr des Nassbaggers verlegten Druckluftleitungen
US5172497A (en) * 1991-10-25 1992-12-22 Lor, Inc. Slurry density control system
US5833444A (en) * 1994-01-13 1998-11-10 Harris; Gary L. Fluid driven motors
NL1014048C2 (nl) * 1997-10-17 2002-01-22 Giw Ind Werkwijze voor het regelen van slurriepompen.
US20030137183A1 (en) * 2002-01-24 2003-07-24 Kerfoot William B. Apparatus and methods for subsidence deepening
WO2014094788A2 (en) * 2012-12-19 2014-06-26 Flsmidth A/S Wet salt harvester
US20150017024A1 (en) * 2012-03-02 2015-01-15 Shell Oil Company Method of controlling an electric submersible pump
USD740331S1 (en) * 2012-09-12 2015-10-06 Lännen Mce Oy Dredger
USD740330S1 (en) * 2012-09-12 2015-10-06 Lännen Mce Oy Dredger

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1381139A (en) * 1920-06-22 1921-06-14 Rateau Battu Smoot Engineering Elastic-fluid-pressure multiplier
US1633786A (en) * 1924-10-22 1927-06-28 Cutler Hammer Mfg Co Controller for power-driven pumps
US1834333A (en) * 1930-05-24 1931-12-01 Moore Steam Turbine Corp Anticlog control for pumps
US2224295A (en) * 1939-10-03 1940-12-10 David L Hofer Suction dredge pump control system
US2572263A (en) * 1949-05-02 1951-10-23 David L Hofer Suction dredge relief valve system
US2599680A (en) * 1947-08-26 1952-06-10 Curtiss Wright Corp Liquid distributing system
US2707964A (en) * 1950-09-12 1955-05-10 Paul S Monroe Measurement and control of the compositions of flowing streams of fluid mixtures
US2889779A (en) * 1957-06-24 1959-06-09 Hofer David Louis Relief valve system for suction dredges
US2910585A (en) * 1956-11-14 1959-10-27 Honeywell Regulator Co Control apparatus
US2938536A (en) * 1957-10-29 1960-05-31 Honeywell Regulator Co Controller
US3007414A (en) * 1956-11-07 1961-11-07 Long Control system for pressurized conduits
US3025232A (en) * 1957-07-12 1962-03-13 Texaco Inc Automatic control of the viscosity of a fractionator product
US3101897A (en) * 1960-12-29 1963-08-27 Suburban Appliance Company Control for burners
US3180040A (en) * 1961-07-31 1965-04-27 Wallace C Ballam Constant velocity governor for hydraulic pipe line dredges
US3224121A (en) * 1963-01-29 1965-12-21 Rick A Denning Apparatus for optimizing dredge production
US3232519A (en) * 1963-05-07 1966-02-01 Vilter Manufacturing Corp Compressor protection system
NL6501404A (da) * 1965-02-04 1966-08-05

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1381139A (en) * 1920-06-22 1921-06-14 Rateau Battu Smoot Engineering Elastic-fluid-pressure multiplier
US1633786A (en) * 1924-10-22 1927-06-28 Cutler Hammer Mfg Co Controller for power-driven pumps
US1834333A (en) * 1930-05-24 1931-12-01 Moore Steam Turbine Corp Anticlog control for pumps
US2224295A (en) * 1939-10-03 1940-12-10 David L Hofer Suction dredge pump control system
US2599680A (en) * 1947-08-26 1952-06-10 Curtiss Wright Corp Liquid distributing system
US2572263A (en) * 1949-05-02 1951-10-23 David L Hofer Suction dredge relief valve system
US2707964A (en) * 1950-09-12 1955-05-10 Paul S Monroe Measurement and control of the compositions of flowing streams of fluid mixtures
US3007414A (en) * 1956-11-07 1961-11-07 Long Control system for pressurized conduits
US2910585A (en) * 1956-11-14 1959-10-27 Honeywell Regulator Co Control apparatus
US2889779A (en) * 1957-06-24 1959-06-09 Hofer David Louis Relief valve system for suction dredges
US3025232A (en) * 1957-07-12 1962-03-13 Texaco Inc Automatic control of the viscosity of a fractionator product
US2938536A (en) * 1957-10-29 1960-05-31 Honeywell Regulator Co Controller
US3101897A (en) * 1960-12-29 1963-08-27 Suburban Appliance Company Control for burners
US3180040A (en) * 1961-07-31 1965-04-27 Wallace C Ballam Constant velocity governor for hydraulic pipe line dredges
US3224121A (en) * 1963-01-29 1965-12-21 Rick A Denning Apparatus for optimizing dredge production
US3232519A (en) * 1963-05-07 1966-02-01 Vilter Manufacturing Corp Compressor protection system
NL6501404A (da) * 1965-02-04 1966-08-05

Cited By (15)

* 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
DE2520732A1 (de) * 1974-08-29 1976-03-11 Sandbergs N A Ing Firman Verfahren und vorrichtung zur steuerung einer beweglichen saugvorrichtung zum aufsaugen von suspendierbarem material vom boden einer fluessigkeitsansammlung
US4037335A (en) * 1974-08-29 1977-07-26 Ingenjorsfirman N.A. Sandbergs Industrikonstruktioner Ab Method of controlling a mobile suction device for sucking suspendible material from the bottom of a liquid body, and an apparatus for carrying out the method
US4470208A (en) * 1981-10-22 1984-09-11 Hendrikus Van Berk Dredge with adjustable bottom support for suction pipe and method
EP0288842A1 (de) * 1987-04-29 1988-11-02 O & K Orenstein & Koppel Aktiengesellschaft Verbindung von auf einem Schiffsrumpf eines Nassbaggers angeordneten Druckluftleitungen mit am Saugrohr des Nassbaggers verlegten Druckluftleitungen
US5172497A (en) * 1991-10-25 1992-12-22 Lor, Inc. Slurry density control system
US5833444A (en) * 1994-01-13 1998-11-10 Harris; Gary L. Fluid driven motors
NL1014048C2 (nl) * 1997-10-17 2002-01-22 Giw Ind Werkwijze voor het regelen van slurriepompen.
US20030137183A1 (en) * 2002-01-24 2003-07-24 Kerfoot William B. Apparatus and methods for subsidence deepening
US6817119B2 (en) * 2002-01-24 2004-11-16 William B. Kerfoot Apparatus and methods for subsidence deepening
US20150017024A1 (en) * 2012-03-02 2015-01-15 Shell Oil Company Method of controlling an electric submersible pump
USD740331S1 (en) * 2012-09-12 2015-10-06 Lännen Mce Oy Dredger
USD740330S1 (en) * 2012-09-12 2015-10-06 Lännen Mce Oy Dredger
WO2014094788A2 (en) * 2012-12-19 2014-06-26 Flsmidth A/S Wet salt harvester
WO2014094788A3 (en) * 2012-12-19 2015-01-29 Flsmidth A/S Wet salt harvester

Also Published As

Publication number Publication date
DE1911274B2 (de) 1975-06-12
NL6803191A (da) 1969-09-09
JPS4945502B1 (da) 1974-12-04
GB1260407A (en) 1972-01-19
BE729247A (da) 1969-09-03
DE1911274A1 (de) 1970-02-05
FR2003368A1 (da) 1969-11-07

Similar Documents

Publication Publication Date Title
US3772805A (en) Method and suction dredging installation for conveying dredging spoil
US3613805A (en) Automatic control for rotary drill
FI67489C (fi) Reglersystem vid en anlaeggning med roerlig suganordning foer sugning av suspenderbart material
US3224121A (en) Apparatus for optimizing dredge production
JP2004332890A (ja) 上下動補償機能付巻上げ装置
ATE99758T1 (de) Foerdermengenregelung eines schaufelradbaggers oder schaufelradaufnehmers im tagebau.
CN206616612U (zh) 一种河道清淤装置
US5172497A (en) Slurry density control system
US3039543A (en) Deep drilling control system
US4053018A (en) Automatic control system for earth-moving equipment
US3380179A (en) Automatic control of swing speed for dredges
Nakai Turbidity generated by dredging projects
US3477152A (en) Control of earthmoving machinery
CN109706993A (zh) 一种智能清淤机
CN105926629B (zh) 水下基床抛石整平船
US3957121A (en) Automatic control system for earth-moving equipment
US3628263A (en) Improvements in pressure differential measuring means for suction dredging instruments
US3621593A (en) Self-regulating system for transmission of solids in a fluid medium
JPH0643703B2 (ja) ドラグサクション浚渫船の浚渫自動制御装置
CN109763527A (zh) 一种绞吸挖泥船基于产量的自动输送控制方法
CN211172149U (zh) 环保绞刀头
CN106838185A (zh) 泥浆泵用齿轮箱的过载保护装置
US2784862A (en) Clam-shell and bucket control system
CA1055319A (en) Cable link system for submersible vehicle
JPH0119011B2 (da)