US3669140A - Suction dredging installation - Google Patents

Suction dredging installation Download PDF

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Publication number
US3669140A
US3669140A US115816A US3669140DA US3669140A US 3669140 A US3669140 A US 3669140A US 115816 A US115816 A US 115816A US 3669140D A US3669140D A US 3669140DA US 3669140 A US3669140 A US 3669140A
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United States
Prior art keywords
conduit
purgative
tactile
measuring point
water
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Expired - Lifetime
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US115816A
Inventor
Romke Van Der Veen
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Ingenieursbureau voor Systemen en Octrooien Spanstaal BV
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Ingenieursbureau voor Systemen en Octrooien Spanstaal BV
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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
    • E02F3/907—Measuring or control devices, e.g. control units, detection means or sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/08—Pipe-line systems for liquids or viscous products
    • F17D1/16—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity
    • F17D1/18—Facilitating the conveyance of liquids or effecting the conveyance of viscous products by modification of their viscosity by heating
    • 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
    • Y10T137/6416—With heating or cooling of the system

Definitions

  • a purgative source connected by means of a purgative con- [5 2] 1.1.8. CI. ..137/334, 37/58 duit to at least one measuring point; [51] Int. Cl ..Fl6k 49/00 at least one pressure sensitive element connected by means [58] Field of Search 137/334, 340; 37/58 of a tactile conduit with said purgative conduit.
  • the suction dredging installation is characterized in that the [56] References Cited tactile conduit is mounted for a considerable part of its length UNITED STATES PATENTS in the purgative conduit of said measuring point, resulting in a simplification of assembling the conduits, and a protection 2,572,263 10/1951 Hofer ..103/l1 against damage and an insulation against excessive coding f 2,889,779 6/1959 Hofer 1 03/11 the tactile conduit 3,111,778 11/1963 F0nnesbeck....
  • the invention relates to a suction dredging installation, comprising a convey pipe for conveying a suspension of dredging spoil and water, said convey pipe being provided with at least one pump;
  • a purgative source connected by means of a purgative conduit to at least one measuring point;
  • At least one pressure sensitive element connected by means of a tactile conduit with said purgative conduit.
  • Such a known suction dredging installation is improved according to the invention, in that the tactile conduit is mounted for a considerable part of its length in the purgative conduit of said measuring point.
  • the number of conduits extending between places which are usually far apart, is considerably reduced, while the assembling of these conduits is simplified.
  • each tactile conduit which can have a small inner diameter concerning its function, is protected against damage by a more robust purgative conduit.
  • a yet more important advantage is the fact that the tactile conduit, in which the purgative, for instance water, is stagnant, is insulated against excessive cooling by the flowing purgative water surrounding the tactile conduit. In winter the danger of freezing of the tactile conduit of the known suction dredging installation is considerable.
  • the freezing of the tactile conduit can be prevented with certainty, for example by pumping outboard water pumped up from the depth, with such a large velocity through the purgative conduit, that the temperature of the purgative water remains above the freezing point over the complete length of the purgative conduit.
  • the suction dredging installation according to the invention is preferably characterized by a heating device for heating the purgative water.
  • FIG. 1 is a scheme of a suction dredging installation according to the invention.
  • FIG. 2 is detail I] ofFIG. 1.
  • a measuring device For measuring the pressure of the suspension of dredging spoil and water flowing through the convey pipe 1 at the place of the measuring point 2 a measuring device is provided, comprising a purgative pump 3, which is connected to the measuring point 2 via a valve 4, which can be opened, a back pressure valve 5, a flow indicator 6, a T-piece 7, and via a purgative conduit 8.
  • the purgative conduit 8 consists of two plastic flexible tubes 80 and 8b coupled to each other by means of a coupling 9.
  • the measuring device comprises further a pressure pick up 10, which is connected to the purgative conduit 8 via a tactile conduit 11.
  • the tactile conduit 11 is mounted inside the purgative conduit 8 over nearly its complete length.
  • the tactile conduit 11 ends at a small distance of the measuring point and is open at this end 12, so that the tactile conduit 11 is connected to the purgative conduit 8 near the measuring point 2.
  • the pressure in the purgative conduit 8 is equal to the pressure of the measuring point 2 at end 12 and is independent of the pump pressure of the purgative pump 3, the length and the shape of the purgative conduit 8 and independent of the temperature of the purgative water.
  • the tactile conduit 11 extends without interruption through the T-piece 7.
  • a conical ring 13 maintained up the tactile conduit 11 is provided, which ring 13 is pressed with its outside against a conical seat of the T-piece 7 by means of a nut l4 and which ring 13 is compressed a little radially, so that this ring 13 pinches at its inner side on the tactile conduit 11.
  • a similar conical ring and a nut are provided to effect sealing between part 8a of the purgative conduit 8 and T-piece 7.
  • the tactile conduit 11 consists of two plastic flexible tubes 11a and 11b, which are coupled to each other by means of the coupling 9.
  • the coupling 9 is performed in such way, that the purgative water surrounds always the tactile water.
  • the coupling 9 has two house halves centered relatively to each other and connected to each other by means of screws 31. In the tangent planes of these house halves l7 and 18 two concentric rooms 19 and 20 are sealed by means of O-rings 21 and 22.
  • Theroom 19 is connected in the house half 17 to a central bore 24 via four canals 23 divided over the periphery, in which bore 24 a reducer 25 is screwed.
  • the end of the flexible tube 8a is connected sealingly in the reducer 25 by means of a conical ring 26 and a nut 27.
  • the flexible tube 11a extends beyond the end of the flexible tube 8a through the reducer 25 and the central bore 24 into the room 20.
  • the end of the flexible tube 11a is connected sealingly in a reducer 30 by means of a conical ring 28 and a nut 29.
  • the flexible tubes 8b and 11b are connected to the house half 18.
  • the back pressure valve 5 prevents: that with strong pressure shocks occurring in the convey pipe 1 dredging spoil enters from the convey pipe 1 into the purgative conduit 8.
  • each of these measuring points 2 is connected to the purgative pump 3 by means of the parts 4, 5, 6, 7 and 8, while then a tactile conduit 11 connected to a pick up 10 is mounted in each purgative conduit 8.
  • each other water pump for example gland pump, provided on board of a suction dredging installation or the normal water conduit can form the purgative source.
  • the pressure picked up by the pressure pick up 10 is equal to the difference of the pressure in the measuring point 2, which is positioned lower, and the height of the water column in the tactile conduit 11.
  • a suction dredging installation comprising, a convey pipe for conveying a suspension of dredging spoil and water, said convey pipe being provided with at least one pump,
  • a purgative source of water connected by means of a purgative conduit to at least one measuring point associated with said convey pipe, and
  • the tactile conduit is mounted for a considerable part of its length within the purgative conduit of said measuring point.
  • a fluid conducting installation comprising, a convey pipe for conveying a dispersion of one kind of material in 6.
  • a heating device is provided for heating the purgative fluid.

Abstract

Suction dredging installation is provided comprising a convey pipe for conveying a suspension of dredging spoil and water, said convey pipe being provided with at least one pump; A PURGATIVE SOURCE CONNECTED BY MEANS OF A PURGATIVE CONDUIT TO AT LEAST ONE MEASURING POINT; AT LEAST ONE PRESSURE SENSITIVE ELEMENT CONNECTED BY MEANS OF A TACTILE CONDUIT WITH SAID PURGATIVE CONDUIT. The suction dredging installation is characterized in that the tactile conduit is mounted for a considerable part of its length in the purgative conduit of said measuring point, resulting in a simplification of assembling the conduits, and a protection against damage and an insulation against excessive cooling of the tactile conduit.

Description

United States Patent van der Veen 1 June 13, 1972 SUCTION DREDGING INSTALLATION 3,469,598 9/ 1969 Wigley ..137/334 3,474,806 10/1969 Coldren et al. ....137/334 X [72] Invent 322; JmPhaas' Nethe" 3,528,449 9/1970 Witte et a1. 1 37/334 x 2,572,263 10/1951 Hofer ..103/11 [7 3] Assignee: N.V. Ingenieursbureau Voor Systemen En 2,889,779 1959 Hofer u 0 l Octrooien Spanstaal, Rotterdam, Nether- 3,111,778 11/1963 Fonnesbeclc ..37/58 lands Primary Examiner-Samuel Scott [22] Filed: Feb. 16, 1971 J. Kali] [21 A 1.'No.: 115 816 1 pp 57 ABSTRACT Related Application Data Suction dredging installation is provided comprising a convey [63] Continuation of Ser. No. 817,719, April 21, 1969, pipe for conveying a suspension of dredging spoil and water, abandoned. said convey pipe being provided with at least one pump;
7 a purgative source connected by means of a purgative con- [5 2] 1.1.8. CI. ..137/334, 37/58 duit to at least one measuring point; [51] Int. Cl ..Fl6k 49/00 at least one pressure sensitive element connected by means [58] Field of Search 137/334, 340; 37/58 of a tactile conduit with said purgative conduit.
The suction dredging installation is characterized in that the [56] References Cited tactile conduit is mounted for a considerable part of its length UNITED STATES PATENTS in the purgative conduit of said measuring point, resulting in a simplification of assembling the conduits, and a protection 2,572,263 10/1951 Hofer ..103/l1 against damage and an insulation against excessive coding f 2,889,779 6/1959 Hofer 1 03/11 the tactile conduit 3,111,778 11/1963 F0nnesbeck.... ..3'7/58 3,424,192 1/1969 Rayneri ..137/340 8 Claims, 2 Drawing Figures 3 HEA/TER PATENTEDJUM 13 m2 HEATER ATTORNEY SUCTION DREDGING INSTALLATION This application is a continuation of Ser. No. 817,719, Apr. 21, 1969, now abandoned.
The invention relates to a suction dredging installation, comprising a convey pipe for conveying a suspension of dredging spoil and water, said convey pipe being provided with at least one pump;
a purgative source connected by means of a purgative conduit to at least one measuring point; and
at least one pressure sensitive element connected by means of a tactile conduit with said purgative conduit.
Such a known suction dredging installation is improved according to the invention, in that the tactile conduit is mounted for a considerable part of its length in the purgative conduit of said measuring point. With this suction dredging installation the number of conduits extending between places which are usually far apart, is considerably reduced, while the assembling of these conduits is simplified. It is further an important advantage that each tactile conduit, which can have a small inner diameter concerning its function, is protected against damage by a more robust purgative conduit. A yet more important advantage is the fact that the tactile conduit, in which the purgative, for instance water, is stagnant, is insulated against excessive cooling by the flowing purgative water surrounding the tactile conduit. In winter the danger of freezing of the tactile conduit of the known suction dredging installation is considerable. On the contrary, with the suction dredging installation according to the invention the freezing of the tactile conduit can be prevented with certainty, for example by pumping outboard water pumped up from the depth, with such a large velocity through the purgative conduit, that the temperature of the purgative water remains above the freezing point over the complete length of the purgative conduit.
The suction dredging installation according to the invention is preferably characterized by a heating device for heating the purgative water. I
The aforementioned and other features of the invention will be elucidated in the following description of a drawing, wherein:
FIG. 1 is a scheme of a suction dredging installation according to the invention; and
FIG. 2 is detail I] ofFIG. 1.
Of a suction dredging installation known by itself only a fraction of a convey pipe 1 for conveying a suspension of dredging spoil and water is shown. This convey pipe 1 is provided with a dredging spoil pump as shown.
For measuring the pressure of the suspension of dredging spoil and water flowing through the convey pipe 1 at the place of the measuring point 2 a measuring device is provided, comprising a purgative pump 3, which is connected to the measuring point 2 via a valve 4, which can be opened, a back pressure valve 5, a flow indicator 6, a T-piece 7, and via a purgative conduit 8. The purgative conduit 8 consists of two plastic flexible tubes 80 and 8b coupled to each other by means of a coupling 9. The measuring device comprises further a pressure pick up 10, which is connected to the purgative conduit 8 via a tactile conduit 11.
According to the invention the tactile conduit 11 is mounted inside the purgative conduit 8 over nearly its complete length. The tactile conduit 11 ends at a small distance of the measuring point and is open at this end 12, so that the tactile conduit 11 is connected to the purgative conduit 8 near the measuring point 2. The pressure in the purgative conduit 8 is equal to the pressure of the measuring point 2 at end 12 and is independent of the pump pressure of the purgative pump 3, the length and the shape of the purgative conduit 8 and independent of the temperature of the purgative water.
The tactile conduit 11 extends without interruption through the T-piece 7. For the sealing between the tactile conduit 11 and the T-piece 7 is a conical ring 13 maintained up the tactile conduit 11 is provided, which ring 13 is pressed with its outside against a conical seat of the T-piece 7 by means of a nut l4 and which ring 13 is compressed a little radially, so that this ring 13 pinches at its inner side on the tactile conduit 11. In the same way a similar conical ring and a nut are provided to effect sealing between part 8a of the purgative conduit 8 and T-piece 7.
The tactile conduit 11 consists of two plastic flexible tubes 11a and 11b, which are coupled to each other by means of the coupling 9.
The coupling 9 is performed in such way, that the purgative water surrounds always the tactile water. The coupling 9 has two house halves centered relatively to each other and connected to each other by means of screws 31. In the tangent planes of these house halves l7 and 18 two concentric rooms 19 and 20 are sealed by means of O- rings 21 and 22. Theroom 19 is connected in the house half 17 to a central bore 24 via four canals 23 divided over the periphery, in which bore 24 a reducer 25 is screwed. The end of the flexible tube 8a is connected sealingly in the reducer 25 by means of a conical ring 26 and a nut 27. The flexible tube 11a extends beyond the end of the flexible tube 8a through the reducer 25 and the central bore 24 into the room 20. The end of the flexible tube 11a is connected sealingly in a reducer 30 by means of a conical ring 28 and a nut 29. In the same way the flexible tubes 8b and 11b are connected to the house half 18.
When the parts shown in FIG. 1 above the line 32 are mounted in a heated space, for example in a vessel, and the parts shown below the line 32 are exposed to the outer temperature, the Water stagnant in the tactile conduit 11 will not freeze, because this water is constantly held above the freezing point by the surrounding purgative water of the purgative conduit 8. With severe frost the purgative water supplied to the purgative pump 3 is heated with the aid of a heating device shown schematically.
The back pressure valve 5 prevents: that with strong pressure shocks occurring in the convey pipe 1 dredging spoil enters from the convey pipe 1 into the purgative conduit 8.
If it is desired with one and the same suction dredging installation to measure the pressure of a plurality of measuring points 2, as is usual, each of these measuring points 2 is connected to the purgative pump 3 by means of the parts 4, 5, 6, 7 and 8, while then a tactile conduit 11 connected to a pick up 10 is mounted in each purgative conduit 8.
Besides an extra purgative pump forming the purgative source, each other water pump, for example gland pump, provided on board of a suction dredging installation or the normal water conduit can form the purgative source.
It is to be remarked that the pressure picked up by the pressure pick up 10 is equal to the difference of the pressure in the measuring point 2, which is positioned lower, and the height of the water column in the tactile conduit 11.
What is claimed is:
1. A suction dredging installation comprising, a convey pipe for conveying a suspension of dredging spoil and water, said convey pipe being provided with at least one pump,
a purgative source of water connected by means of a purgative conduit to at least one measuring point associated with said convey pipe, and
at least one pressure sensitive element coupled by means of a tactile conduit with said purgative conduit,
wherein the tactile conduit is mounted for a considerable part of its length within the purgative conduit of said measuring point.
2. The suction dredging installation according to claim 1, wherein a heating device is provided for heating purgative water.
3. The suction dredging installation according to claim 1, wherein the tactile conduit ends near to said measuring point inside the purgative conduit.
4. The suction dredging installation according to claim 1, wherein a back pressure valve is provided in the purgative conduit.
5. In a fluid conducting installation comprising, a convey pipe for conveying a dispersion of one kind of material in 6. The fluid conducting installation according to claim 5, wherein a heating device is provided for heating the purgative fluid.
7. The fluid conducting installation according to claim 5, wherein the tactile conduit ends near to said measuring point inside the purgative conduit.
8. The fluid conducting installation according to claim 5, wherein a back pressure valve is provided in the purgative conduit.
it l i i

Claims (8)

1. A suction dredging installation comprising, a convey pipe for conveying a suspension of dredging spoil and water, said convey pipe being provided with at least one pump, a purgative source of water connected by means of a purgative conduit to at least one measuring point associated with said convey pipe, and at least one pressure sensitive element coupled by means of a tactile conduit with said purgative conduit, wherein the tactile conduit is mounted for a considerable part of its length within the purgative conduit of said measuring point.
2. The suction dredging installation according to claim 1, wherein a heating device is provided for heating purgative water.
3. The suction dredging installation according to claim 1, wherein the tactile conduit ends near to said measuring point inside the purgative conduit.
4. The suction dredging installation according to claim 1, wherein a back pressure valve is provided in the purgative conduit.
5. In a fluid conducting installation comprising, a convey pipe for conveying a dispersion of one kind of material in another, said convey pipe being provided with at least one pump, a source of purgative fluid connected by means of a purgative conduit to at least one measuring point associated with said convey pipe, and at least one pressure sensitive element coupled by means of a tactile conduit with said purgative conduit, wherein the tactile conduit is mounted for a considerable part of its length within the purgative conduit of said measuring point.
6. The fluid conducting installation according to claim 5, wherein a heating device is provided for heating the purgative fluid.
7. The fluid conducting installation according to claim 5, wherein the tactile conduit ends near to said measuring point inside the purgative conduit.
8. The fluid conducting installation according to claim 5, wherein a back pressure valve is provided in the purgative conduit.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140205385A1 (en) * 2011-07-21 2014-07-24 Ihc Holland Ie B.V. Pump frame

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572263A (en) * 1949-05-02 1951-10-23 David L Hofer Suction dredge relief valve system
US2889779A (en) * 1957-06-24 1959-06-09 Hofer David Louis Relief valve system for suction dredges
US3111778A (en) * 1961-01-06 1963-11-26 Byron C Fonnesbeck Hydraulic dredge production sustanining control
US3424192A (en) * 1964-10-26 1969-01-28 Paul Rayneri Equipment,more particularly for manufacturing plastic materials
US3469598A (en) * 1965-05-11 1969-09-30 Albert Fletcher Wigley Taps
US3474806A (en) * 1967-09-08 1969-10-28 Shell Oil Co In situ pipeline heat generation
US3528449A (en) * 1968-02-27 1970-09-15 Trw Inc Fluid flow control apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572263A (en) * 1949-05-02 1951-10-23 David L Hofer Suction dredge relief valve system
US2889779A (en) * 1957-06-24 1959-06-09 Hofer David Louis Relief valve system for suction dredges
US3111778A (en) * 1961-01-06 1963-11-26 Byron C Fonnesbeck Hydraulic dredge production sustanining control
US3424192A (en) * 1964-10-26 1969-01-28 Paul Rayneri Equipment,more particularly for manufacturing plastic materials
US3469598A (en) * 1965-05-11 1969-09-30 Albert Fletcher Wigley Taps
US3474806A (en) * 1967-09-08 1969-10-28 Shell Oil Co In situ pipeline heat generation
US3528449A (en) * 1968-02-27 1970-09-15 Trw Inc Fluid flow control apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140205385A1 (en) * 2011-07-21 2014-07-24 Ihc Holland Ie B.V. Pump frame

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