EP2739793B1 - Device for removing sea bed - Google Patents

Device for removing sea bed Download PDF

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Publication number
EP2739793B1
EP2739793B1 EP12737288.6A EP12737288A EP2739793B1 EP 2739793 B1 EP2739793 B1 EP 2739793B1 EP 12737288 A EP12737288 A EP 12737288A EP 2739793 B1 EP2739793 B1 EP 2739793B1
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EP
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Prior art keywords
water
line
emergency emptying
water reservoir
hydraulic
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EP12737288.6A
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German (de)
French (fr)
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EP2739793A1 (en
Inventor
Hermann Josef Von Wirth
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Mhwirth GmbH
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Mhwirth GmbH
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F7/00—Equipment for conveying or separating excavated material
    • E02F7/10—Pipelines for conveying excavated materials
    • 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
    • E02F3/902—Component parts, e.g. arrangement or adaptation of pumps for modifying the concentration of the dredged material, e.g. relief valves preventing the clogging of the suction pipe
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/006—Dredgers or soil-shifting machines for special purposes adapted for working ground under water not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C50/00—Obtaining minerals from underwater, not otherwise provided for

Definitions

  • the invention relates to a device for the degradation of the seabed, with a working after the airlift process or with feed pumps, at least partially surrounded by sea water conveyor line, is transported through the degraded seabed in the conveying direction to the surface.
  • the volume fraction of the transported inside the feed line Guts typically be up to 10% of the inner volume of the feed line.
  • the latter has, for example, an inner diameter of 40 cm.
  • feed pumps are used, a stronger flow upwards can be generated regularly.
  • the volume fraction of the transported material is then greater, and the process even more susceptible to clogging.
  • the cause of such an interruption may be, in particular, the failure of the flow transport in the feed train.
  • Reason for this may be an accumulation of mined seabed inside the conveyor string, which gradually blocks the entire inner cross section of the production line.
  • a failure of the power supply or the compressors over which the required for the operation of the airlift process compressed air is blown into the interior of the conveyor line conceivable. If the bottom of the sea is first pumped by an overburden vehicle via solids pumps to an intermediate station called a "buffer" and from there it is conveyed via the production line to the overwater unit, defects in the underwater unit can also lead to a failure of the flow transport. In addition, extreme environmental events are conceivable, due to which the flow transport is interrupted.
  • a double pipe conveyor system which consists of a ring pipe, the pipes are returned as sink pipe from the sea surface to the seabed and as a lifting tube for the conveyed back to the sea surface.
  • this ring pipe circulates as transport liquid preferably pressurized water, which is circulated by pumps.
  • the conveyed goods is introduced via a pressure lock on the seabed in the ring pipeline.
  • the pressure of the hydraulic fluid is dimensioned such that the conveyed material introduced into the loop is lifted in the lifting tube to the water surface.
  • the US 3,307,576 A shows an automatic drain valve device for use in pressurized pump lines of underwater mining. It is shown a flap, which is held in an existing overpressure in the line in the closed state and is opened by eliminating this excess pressure by a weight.
  • the JP 6-54074 discloses a device with a at least partially surrounded by sea water conveyor string, wherein the conveyor line has a Notentle réelles issued.
  • the invention is therefore based on the object of further developing a device described above in such a way that the risk of the formation of a previously described plug is at least substantially reduced in the event of an interruption or a failure of the flow transport.
  • the conveyor line of this device comprises an emergency emptying device, by means of which, contrary to the conveying direction moving, degraded seabed from the feed line into the sea water can be derived. Due to this measure it is avoided that the mined seabed, which is at the time of interruption or failure of the flow inside the conveyor string, settles to form a plug of the type described above at the lower end of the conveyor string.
  • the emergency emptying device comprises at least one openable and closable emergency emptying opening through which, contrary to the conveying direction, moving, degraded seabed is preferred laterally derived from the production line in the sea water.
  • a plurality of emergency discharge openings are particularly preferably provided, which are preferably distributed approximately at regular intervals over the length of the conveyor line.
  • the distances are preferably between 200 m and 700 m, more preferably between 400 m and 500 m in length. Assuming that inside the conveyor string located, degraded seabed sinks after a flow failure with typically 0.5 m / s, the emergency emptying openings should remain open in a particularly preferred case 13 to 17 minutes to almost complete emptying of the interior of the To ensure production line of the mined seabed.
  • each emergency emptying opening There is an emergency emptying flap on each emergency emptying opening. It can be displaced into the interior of the conveyor line in such a way that, contrary to the conveying direction, moving, degraded seabed can be diverted into the seawater under the effect of the emergency emptying flap through the emergency emptying opening.
  • a water-hydraulically actuable piston / cylinder arrangement For shifting the emergency emptying flap between the open and the closed position, a water-hydraulically actuable piston / cylinder arrangement is provided.
  • the main advantage of water hydraulic actuation is their environmental friendliness. Thus, any leaks do not lead to environmentally harmful leakage of hydraulic oil into the environment. But it can also be dispensed with a closed hydraulic circuit, since at a desired pressure release, the water is simply released to the environment and a return can be dispensed by means of a separate return line in the pressure reservoir.
  • the water-hydraulically operating device can therefore be designed with only a single, central hydraulic supply line for all piston / cylinder arrangements.
  • the piston / cylinder assemblies are so spring-loaded that they cause the non-pending, water-hydraulic pressure, the closed position of the emergency emptying flaps. It is therefore only a pressurization of the piston / cylinder assemblies required when the flow of transport in the conveyor line due to interference comes to a standstill.
  • the hydraulic line is connected to a water reservoir providing the water hydraulic pressure. It may comprise a closed water tank which is filled with compressed air above the water level.
  • the tank may be connected to a compressor, which keeps the pressure prevailing in the tank internal pressure at a predetermined value.
  • the connected to the water reservoir hydraulic line preferably has a free, closed by a check valve end.
  • the check valve is arranged such that it opens against the prevailing pressure within the hydraulic line.
  • the illustrated in the drawing embodiment of a device according to the invention comprises a in Fig. 1 It is approximately tubular with an inner diameter 2 of 40 cm formed.
  • the conveyor line serves to convey mined seabed to the surface by means of the so-called airlift method, also called "air lifting method".
  • Mineral minerals such as manganese nodules, which are obtained at a depth of about 5000 m, are particularly suitable mined seabed. Accordingly, the length of the conveyor string may be about 5000 m.
  • emergency emptying 4 are provided at a distance of about 500 m.
  • the conveyor strand has an approximately oval cross-section.
  • a bearing device 7 is provided on the outside of the wall 6 of the conveyor line 1, to which an emergency emptying flap 8 is articulated, which is pivotable about a transversely to the longitudinal extent L of the conveyor line 1 extending hinge axis T. It can between a closed, the emergency emptying opening 5 completely closing position, in which it is substantially flush with the wall 6 of the conveyor line 1, and a in Fig. 1 shown, open position in which it lies with its the hinge axis T remote edge 9 inside the wall 6 on the opposite side of the emergency emptying opening 5 and forms an opening angle ⁇ of about 30 ° with the opening plane, are pivoted.
  • a water-hydraulically operated piston / cylinder arrangement 10 is provided for the pivoting operation between the closed and the open position. It engages with its piston rod 12 via one of the surface of the emergency emptying flap 8 approximately perpendicular projecting lever 11 to the emergency emptying flap 8.
  • the cylinder-side end of the piston / cylinder assembly 10 is in turn attached to a bearing projection 13 on the outside of the wall 6.
  • a compression spring 15 is arranged in the annular space between the piston rod 12 and the cylinder chamber 14. It causes the piston rod in its withdrawn Position in which the emergency emptying flap 8 is aligned with the wall 6 and thus closes the emergency emptying opening 5, is stored when the cylinder chamber is not acted upon by pressurized water.
  • Fig. 2 O is the seawater surface.
  • the cylinder chambers 14 of the piston / cylinder assemblies 10 are connected via supply lines 17 to a hydraulic line 18.
  • the compression spring 15 acts according to the embodiment Fig. 2 on the piston head on the piston rod 12 opposite side. Accordingly, the cylinder chambers are formed by the annular space surrounding the piston rod. This compared to the embodiment according to Fig.
  • the hydraulic line 18 is hydraulically connected via a switching valve 19 to a water reservoir 20. Between the switching valve 19 and the water reservoir 20, a measuring device 21 is turned on, by means of which the flow rate and the pressure under which the water located within the hydraulic line 18, can be measured.
  • the water reservoir 20 includes a pressure tank 22. This is filled to a level 23 with water. Above the level 23 is a freely movable piston 38, on which a compressed air cushion acts, which is connected by means of a high-pressure piston compressor 24, the high-pressure air reservoir 25 to the pressure tank 22, also called “piston battery” is generated.
  • a pressure gauge 26 and a pressure relief valve 27 are turned on. With appropriate means 28 and the running between the high-pressure piston compressor and the high-pressure accumulator pressure line is equipped.
  • the water reservoir 20 further comprises a fresh water tank 29 from which pressurized water can be pumped through a high pressure water pump 31 into the pressure tank 22 via a line secured against backflow by a check valve 30 to achieve or maintain the desired level 23.
  • a leading to the fresh water tank bypass 32 is turned on, which is connected to this line via a stopcock 33 and a pressure relief valve 34.
  • the triggering of the switching valve 19 activating emergency switch 35 which is operated manually or via suitable, not shown in the drawing sensors that measure the flow rate in the conveyor line 1, is actuated , that the switching valve 19 is displaced into the switch position III.
  • the hydraulic line 18 is connected to the pressure tank 22. Due to the pressure increase water flows into the cylinder chambers 14 of the piston-cylinder assemblies 10 and actuates them against the action of the compression springs 15, which leads to the opening of the emergency emptying flaps. Descending solid particles are - as described above - laterally displaced by the emergency discharge openings 5 to the outside.
  • the switching valve 19 is brought by suitable means in the switch position II.
  • the supply line from the pressure tank 22 is closed by the hydraulic line 18.
  • the hydraulic line is open to the environment or to a fresh water reservoir, which may be the fresh water tank 29. Due to the restoring forces generated by the compression springs 15, the emergency emptying flaps 8 are brought into the closed position with the aid of the piston rods 12.
  • the switching valve 19 is in the in Fig. 2 illustrated rest position I shifts in which the hydraulic line 18 is connected via a against the water reservoir provided by the water hydraulic pressure-opening check valve with a fresh water reservoir 29.
  • the hydraulic line 18 has a free end 36 with respect to the environment. It is closed by a check valve 37 which is to be opened against the pressure prevailing within the hydraulic line 18 pressure.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)
  • Emergency Lowering Means (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Barrages (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Abbau von Meeresgrund, mit einem nach dem Airlift-Verfahren oder mit Förderpumpen arbeitenden, zumindest teilweise von Meerwasser umgebenen Förderstrang, durch den abgebauter Meeresgrund in Förderrichtung an die Oberfläche transportierbar ist.The invention relates to a device for the degradation of the seabed, with a working after the airlift process or with feed pumps, at least partially surrounded by sea water conveyor line, is transported through the degraded seabed in the conveying direction to the surface.

Unter dem "Airlift-Verfahren" ist das bekannte Verfahren zum Fördern von abgebautem Meergrund bekannt, bei welchem im unteren Bereich des Förderstrangs Druckluft ins Innere desselben eingespeist wird. Die im Innern des Förderstrangs aufsteigenden Luftblasen bewirken eine Strömung im Innern des Bohrstrangs nach oben, welche abgebauten Meeresgrund zu einer Überwassereinheit fördert.Under the "airlift process" the known method for conveying mined seabed is known in which the same is fed to the inside of the same in the lower part of the conveyor line. The rising inside the conveyor string air bubbles cause a flow inside the drill string upwards, which promotes degraded seabed to an overwater unit.

Insbesondere, wenn eine derartige Vorrichtung zum Fördern mineralischer Rohstoffe, insbesondere von Manganknollen aus der Tiefsee, beispielsweise einer Wassertiefe von etwa 5000 m eingesetzt wird, kann der Volumenanteil des im Inneren des Förderstrangs transportierten Guts typischerweise bis zu 10 % des Innenvolumens des Förderstrangs betragen. Letzterer weist beispielsweise einen Innendurchmesser von 40 cm auf.In particular, if such a device for conveying mineral raw materials, in particular of manganese nodules from the deep sea, for example, a water depth of about 5000 m is used, the volume fraction of the transported inside the feed line Guts typically be up to 10% of the inner volume of the feed line. The latter has, for example, an inner diameter of 40 cm.

Sollten Förderpumpen zum Einsatz kommen, so kann regelmäßig eine stärkere Strömung nach oben erzeugt werden. Der Volumenanteil des transportierten Guts ist dann größer, und das Verfahren noch empfindlicher gegen Verstopfen.If feed pumps are used, a stronger flow upwards can be generated regularly. The volume fraction of the transported material is then greater, and the process even more susceptible to clogging.

Wenn nun - aus welchen Gründen auch immer - die Förderung des abgebauten Meeresgrundes durch den Förderstrang zum Erliegen kommt, sinkt der sich im Förderstrang befindliche Meeresgrund aufgrund seiner erheblich höheren Dichte als des Meerwassers schnell nach unten ab. Bei einer angenommenen Wassertiefe von 5000 m und einem Volumenanteil des abgebauten Meeresgrundes von 10 % bildet sich somit ein Stopfen von 500 m. Ein Freimachen des Innern des Förderstrangs ist dann regelmäßig nicht mehr oder nur unter allergrößten Schwierigkeiten möglich. Ebenso kann eine Bergung des Förderstrangs aufgrund der großen Masse des Stopfens, die bei dem hier angenommenen Beispiel grob 1500 bis 2000 t betragen kann, nicht mehr erfolgen. Im schlimmsten Fall ist demnach der Förderstrang nach einer Unterbrechung des Fördervorganges aufzugeben.If, for whatever reason, the extraction of the mined seabed by the production line comes to a standstill, the seabed located in the production line sinks rapidly down due to its considerably higher density than that of the seawater. With an assumed water depth of 5000 m and a volume fraction of the mined seabed of 10%, a plug of 500 m is formed. A clearing of the interior of the production line is then regularly no longer possible or only with the greatest difficulty. Likewise, a salvage of the conveyor string due to the large mass of the plug, which may be roughly 1500 to 2000 t in the example assumed here, no longer occur. In the worst case, therefore, the conveyor string is to be abandoned after an interruption of the conveying process.

Ursache für eine solche Unterbrechung kann insbesondere der Ausfall des Strömungstransports im Förderstrang sein. Grund für diesen kann eine Anlagerung von abgebautem Meeresgrund im Inneren des Förderstrangs sein, die nach und nach den gesamten Innenquerschnitt des Förderstrangs blockiert. Ebenso ist ein Ausfall der Energieversorgung oder der Kompressoren, über welcher die für den Betrieb des Airlift-Verfahrens benötigte Druckluft ins Innere des Förderstrangs eingeblasen wird, denkbar. Wird der Meeresgrund von einem Abraumfahrzeug über Feststoffpumpen zunächst zu einer als "Buffer" bezeichneten Zwischenstation gepumpt und von dort aus über den Förderstrang zur Überwassereinheit gefördert, so können auch Defekte an der Unterwassereinheit zu einem Ausfall des Strömungstransports führen. Darüber hinaus sind auch extreme Umweltereignisse denkbar, aufgrund welcher der Strömungstransport unterbrochen wird.The cause of such an interruption may be, in particular, the failure of the flow transport in the feed train. Reason for this may be an accumulation of mined seabed inside the conveyor string, which gradually blocks the entire inner cross section of the production line. Likewise, a failure of the power supply or the compressors over which the required for the operation of the airlift process compressed air is blown into the interior of the conveyor line, conceivable. If the bottom of the sea is first pumped by an overburden vehicle via solids pumps to an intermediate station called a "buffer" and from there it is conveyed via the production line to the overwater unit, defects in the underwater unit can also lead to a failure of the flow transport. In addition, extreme environmental events are conceivable, due to which the flow transport is interrupted.

Aus der DE 2008384 A ist eine Doppelrohrförderanlage bekannt, die aus einer Ringrohrleitung besteht, deren Rohre als Sinkrohr von der Meeresoberfläche bis zum Meeresboden und als Hubrohr für das Fördergut wieder zur Meeresoberfläche zurückgeführt werden. In dieser Ringrohrleitung zirkuliert als Transportflüssigkeit vorzugsweise Druckwasser, welches von Pumpen umgewälzt wird. Das Fördergut wird über eine Druckschleuse am Meeresboden in die Ringrohrleitung eingebracht. Der Druck der Druckflüssigkeit ist so bemessen, dass das in die Ringleitung eingebrachte Fördergut im Hubrohr bis zur Wasseroberfläche gehoben wird.From the DE 2008384 A is a double pipe conveyor system is known, which consists of a ring pipe, the pipes are returned as sink pipe from the sea surface to the seabed and as a lifting tube for the conveyed back to the sea surface. In this ring pipe circulates as transport liquid preferably pressurized water, which is circulated by pumps. The conveyed goods is introduced via a pressure lock on the seabed in the ring pipeline. The pressure of the hydraulic fluid is dimensioned such that the conveyed material introduced into the loop is lifted in the lifting tube to the water surface.

Aus der US 4,429,622 A ist ein drucksensibles Betätigungselement für ein Entleerungsventil in einer Unterwasser-Bergbau-Leitung bekannt.From the US 4,429,622 A For example, a pressure sensitive actuator for a drain valve in an underwater mining line is known.

Die US 3,307,576 A zeigt eine automatische Entleerungsventilvorrichtung für den Gebrauch in Druck-Pump-Leitungen des Unterwasserbergbaus. Es ist eine Klappe gezeigt, die bei einem bestehenden Überdruck in der Leitung im geschlossenen Zustand gehalten wird und bei Wegfall dieses Überdrucks durch ein Gewicht geöffnet wird.The US 3,307,576 A shows an automatic drain valve device for use in pressurized pump lines of underwater mining. It is shown a flap, which is held in an existing overpressure in the line in the closed state and is opened by eliminating this excess pressure by a weight.

Die JP 6-54074 offenbart eine Vorrichtung mit einem zumindest teilweise von Meerwasser umgebenen Förderstrang, wobei der Förderstrang eine Notentleerungseinrichtung aufweist.The JP 6-54074 discloses a device with a at least partially surrounded by sea water conveyor string, wherein the conveyor line has a Notentleerungseinrichtung.

Der Erfindung liegt daher die Aufgabe zugrunde, eine eingangs beschriebene Vorrichtung derart weiterzuentwickeln, dass das Risiko der Bildung eines vorbeschriebenen Stopfens bei einer Unterbrechung oder einem Ausfall des Strömungstransports zumindest wesentlich reduziert ist.The invention is therefore based on the object of further developing a device described above in such a way that the risk of the formation of a previously described plug is at least substantially reduced in the event of an interruption or a failure of the flow transport.

Diese Aufgabe wird durch die in Anspruch 1 wiedergegebene Vorrichtung gelöst.This object is achieved by the reproduced in claim 1 device.

Der Förderstrang dieser Vorrichtung umfasst eine Notentleerungseinrichtung, mittels welcher sich entgegen der Förderrichtung bewegender, abgebauter Meeresgrund aus dem Förderstrang in das Meerwasser ableitbar ist. Aufgrund dieser Maßnahme wird vermieden, dass sich der abgebaute Meeresgrund, der sich zum Zeitpunkt der Unterbrechung oder des Ausfalls des Förderstroms im Innern des Förderstrangs befindet, unter Bildung eines Stopfens der eingangs beschriebenen Art am unteren Ende des Förderstrangs absetzt.The conveyor line of this device comprises an emergency emptying device, by means of which, contrary to the conveying direction moving, degraded seabed from the feed line into the sea water can be derived. Due to this measure it is avoided that the mined seabed, which is at the time of interruption or failure of the flow inside the conveyor string, settles to form a plug of the type described above at the lower end of the conveyor string.

Die Notentleerungseinrichtung umfasst mindestens eine öffen- und verschließbare Notentleerungsöffnung, durch die sich entgegen der Förderrichtung bewegender, abgebauter Meeresgrund bevorzugt seitlich aus dem Förderstrang in das Meerwasser ableitbar ist.The emergency emptying device comprises at least one openable and closable emergency emptying opening through which, contrary to the conveying direction, moving, degraded seabed is preferred laterally derived from the production line in the sea water.

Damit die Ableitung zur Reduzierung von Ausfallzeiten beschleunigt und das Restrisiko einer Stopfenbildung weiter reduziert wird, sind besonders bevorzugt eine Mehrzahl von Notentleerungsöffnungen vorgesehen, die vorzugsweise etwa in regelmäßigen Abständen über die Länge des Förderstranges verteilt angeordnet sind.In order to accelerate the discharge to reduce downtime and further reduce the residual risk of plug formation, a plurality of emergency discharge openings are particularly preferably provided, which are preferably distributed approximately at regular intervals over the length of the conveyor line.

Die Abstände betragen vorzugsweise zwischen 200 m und 700 m, besonders bevorzugt zwischen 400 m und 500 m Länge. Nimmt man an, dass sich im Innern des Förderstranges befindlicher, abgebauter Meeresgrund nach einem Strömungsausfall mit typischerweise 0,5 m/s absinkt, so müssten die Notentleerungsöffnungen im besonders bevorzugten Falle 13 bis 17 Minuten geöffnet bleiben, um eine nahezu vollständige Entleerung des Innern des Förderstrangs von dem abgebauten Meeresgrund zu gewährleisten.The distances are preferably between 200 m and 700 m, more preferably between 400 m and 500 m in length. Assuming that inside the conveyor string located, degraded seabed sinks after a flow failure with typically 0.5 m / s, the emergency emptying openings should remain open in a particularly preferred case 13 to 17 minutes to almost complete emptying of the interior of the To ensure production line of the mined seabed.

Es ist an jeder Notentleerungsöffnung eine Notentleerungsklappe vorgesehen. Sie kann derart ins Innere des Förderstranges verlagert werden, dass entgegen der Förderrichtung sich bewegender, abgebauter Meeresgrund unter Wirkung der Notentleerungsklappe durch die Notentleerungsöffnung in das Meerwasser ableitbar ist.There is an emergency emptying flap on each emergency emptying opening. It can be displaced into the interior of the conveyor line in such a way that, contrary to the conveying direction, moving, degraded seabed can be diverted into the seawater under the effect of the emergency emptying flap through the emergency emptying opening.

Zur Verlagerung der Notentleerungsklappe zwischen der Offen- und der Verschlussstellung ist eine wasserhydraulisch betätigbare Kolben/Zylinderanordnung vorgesehen. Der wesentliche Vorteil der wasserhydraulischen Betätigung ist ihre Umweltfreundlichkeit. So führen eventuelle Leckagen nicht zu einem umweltbedenklichen Austritt von Hydrauliköl in die Umgebung. Sondern es kann auch auf einen geschlossenen Hydraulikkreislauf verzichtet werden, da bei einem gewünschten Druckablass das Wasser einfach an die Umgebung abgegeben und eine Rückführung mittels einer separaten Rückführleitung in das Druckreservoir verzichtet werden kann. Die wasserhydraulisch arbeitende Vorrichtung kann daher mit nur einer einzigen, zentralen Hydraulikzuleitung für sämtliche Kolben/Zylinderanordnungen konzipiert sein.For shifting the emergency emptying flap between the open and the closed position, a water-hydraulically actuable piston / cylinder arrangement is provided. The main advantage of water hydraulic actuation is their environmental friendliness. Thus, any leaks do not lead to environmentally harmful leakage of hydraulic oil into the environment. But it can also be dispensed with a closed hydraulic circuit, since at a desired pressure release, the water is simply released to the environment and a return can be dispensed by means of a separate return line in the pressure reservoir. The water-hydraulically operating device can therefore be designed with only a single, central hydraulic supply line for all piston / cylinder arrangements.

Damit die Hydraulikleitung und die wasserhydraulisch betätigbaren Kolben/Zylinderanordnungen nicht während des Förderbetriebs stets mit Druck beaufschlagt werden müssen, sind die Kolben/Zylinderanordnungen derart federkraftbeaufschlagt, dass sie bei nicht anstehendem, wasserhydraulischem Druck die Verschlussstellung der Notentleerungsklappen bewirken. Es wird also nur eine Druckbeaufschlagung der Kolben/Zylinderanordnungen erforderlich, wenn der Strömungstransport in dem Förderstrang störungsbedingt zum Erliegen kommt.So that the hydraulic line and the water-hydraulically operable piston / cylinder assemblies do not always have to be pressurized during the delivery operation, the piston / cylinder assemblies are so spring-loaded that they cause the non-pending, water-hydraulic pressure, the closed position of the emergency emptying flaps. It is therefore only a pressurization of the piston / cylinder assemblies required when the flow of transport in the conveyor line due to interference comes to a standstill.

Die Hydraulikleitung ist an ein den wasserhydraulischen Druck bereitstellendes Wasserreservoir angeschlossen. Es kann einen geschlossenen Wassertank umfassen, welcher oberhalb des Wasserspiegels mit Druckluft gefüllt ist. Hierzu kann der Tank an einen Kompressor angeschlossen sein, welcher den in dem Tank herrschenden Innendruck auf einem vorgegebenen Wert hält.The hydraulic line is connected to a water reservoir providing the water hydraulic pressure. It may comprise a closed water tank which is filled with compressed air above the water level. For this purpose, the tank may be connected to a compressor, which keeps the pressure prevailing in the tank internal pressure at a predetermined value.

Die an das Wasserreservoir angeschlossene Hydraulikleitung weist vorzugsweise ein freies, durch ein Rückschlagventil verschlossenes Ende auf. Das Rückschlagventil ist derart angeordnet, dass es entgegen dem innerhalb der Hydraulikleitung herrschenden Druck öffnet. Mit dieser Hydraulikleitung sind die Kolben/Zylinderanordnungen zwecks ihrer Betätigung entgegen der Federkraft verbunden.The connected to the water reservoir hydraulic line preferably has a free, closed by a check valve end. The check valve is arranged such that it opens against the prevailing pressure within the hydraulic line. With this hydraulic line, the piston / cylinder assemblies are connected for the purpose of their operation against the spring force.

Zwischen dem Wasserreservoir und der Hydraulikleitung ist vorzugsweise ein Schaltventil eingebaut, mit welchem die folgenden Schaltstellungen bewirkbar sind:

  • Trennung des Wasserreservoirs von der Hydraulikleitung mittels eines gegen den vom Wasserreservoir bereitgestellten wasserhydraulischen Druck öffnendes Rückschlagventil. In dieser Schaltstellung befindet sich das Schaltventil bei Normalbetrieb der Vorrichtung, d.h. wenn der gewünschte Förderstrom in dem Förderstrang herrscht.
  • Verbindung des Wasserreservoirs mit der Hydraulikleitung. Bei dieser Schaltstellung, die sowohl manuell, als auch - sofern entsprechende Sensoren vorhanden sind - beim Ausfall oder der Unterbrechung des Strömungstransports automatisch bewirkt werden kann, führt der von dem Wasserreservoir auf das Wasser in der Hydraulikleitung aufgebrachte Druck zu einer Betätigung der Kolben/Zylinderanordnungen entgegen dem Federdruck, wodurch die Verlagerung der Notentleerungsklappen ins Innere des Förderstrangs zum Zwecke des Ableitens abgebauten Meeresgrundes nach außen erfolgt.
  • Trennung des Wasserreservoirs von der Hydraulikleitung und gleichzeitiges Schließen des Wasserreservoirs und Öffnen der Hydraulikleitung zur Umgebung. In diese Stellung wird das Schaltventil gebracht, wenn nach Behebung der Störung der Fördervorgang wieder in Gang gesetzt werden soll, bzw. wenn das innerhalb des Förderstrangs befundene Material durch Öffnen der Notentleerungsöffnungen in das umgebende Meerwasser abgeleitet worden ist.
Between the water reservoir and the hydraulic line, a switching valve is preferably installed, with which the following switching positions are effected:
  • Separation of the water reservoir from the hydraulic line by means of a against the water reservoir provided by the water hydraulic pressure-opening check valve. In this switching position, the switching valve is in normal operation of the device, ie when the desired flow prevails in the conveyor line.
  • Connection of the water reservoir with the hydraulic line. In this switching position, both manually, and - if appropriate sensors present are - automatically effected in the failure or interruption of the flow transport, the pressure applied by the water reservoir to the water in the hydraulic line pressure to actuate the piston / cylinder assemblies against the spring pressure, whereby the displacement of the emergency emptying flaps inside the conveyor line for the purpose of Derived mined seabed outwards.
  • Separation of the water reservoir from the hydraulic line and simultaneous closing of the water reservoir and opening of the hydraulic line to the environment. In this position, the switching valve is brought when after elimination of the disturbance of the delivery process to be restarted, or if the found within the conveyor string material has been derived by opening the emergency emptying openings in the surrounding seawater.

Die Erfindung soll nun anhand der beigefügten Zeichnungen näher erläutert werden. Es zeigen:

Fig. 1
- schematisch - eine Ansicht eines Bereichs des Förderstranges um eine Notentleerungsöffnung, teilweise längsgeschnitten, sowie
Fig. 2
das Hydraulikschema eines Ausführungsbeispiels der erfindungsgemäßen Vorrichtung.
The invention will now be explained in more detail with reference to the accompanying drawings. Show it:
Fig. 1
schematically a view of an area of the conveyor line around an emergency discharge opening, partially cut longitudinally, as well
Fig. 2
the hydraulic diagram of an embodiment of the device according to the invention.

Das in der Zeichnung dargestellte Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung umfasst einen in Fig. 1 ausschnittsweise dargestellten Förderstrang 1. Er ist etwa rohrförmig mit einem Innendurchmesser 2 von 40 cm ausgebildet. Der Förderstrang dient dem Fördern von abgebautem Meeresgrund mit Hilfe des sogenannten Airlift-Verfahrens, auch "Lufthebeverfahren" genannt, an die Oberfläche. Als abgebauter Meeresgrund kommen insbesondere mineralische Rohrstoffe, wie beispielsweise Manganknollen in Betracht, die in einer Meerestiefe von etwa 5000 m gewonnen werden. Dementsprechend kann die Länge des Förderstrangs etwa 5000 m betragen.The illustrated in the drawing embodiment of a device according to the invention comprises a in Fig. 1 It is approximately tubular with an inner diameter 2 of 40 cm formed. The conveyor line serves to convey mined seabed to the surface by means of the so-called airlift method, also called "air lifting method". Mineral minerals, such as manganese nodules, which are obtained at a depth of about 5000 m, are particularly suitable mined seabed. Accordingly, the length of the conveyor string may be about 5000 m.

Mit Hilfe des Airlift-Verfahrens wird im Innern 3 des Förderstrangs 1 eine Flüssigkeitsströmung nach oben erzeugt, wie dies durch den Pfeil S symbolisiert sein soll.With the aid of the airlift method, a liquid flow is generated upwardly in the interior 3 of the conveyor line 1, as should be symbolized by the arrow S.

Um zu vermeiden, dass sich bei einer Unterbrechung oder einem Ausfall des Strömungstransports nach oben große Mengen an abgebautem Meeresgrund am unteren Ende des Förderstrangs 1 zu einem Stopfen verdichten, sind im Abstand von etwa 500 m Notentleerungseinrichtungen 4 vorgesehen.In order to avoid that at an interruption or a failure of the flow transport upwards large amounts of degraded seabed at the lower end of the production line 1 compress to a stopper, emergency emptying 4 are provided at a distance of about 500 m.

Die Funktionsweise dieser Notentleerungseinrichtungen soll nachfolgend unter Bezugnahme auf Fig. 1, die eine derselben im aktivierten Zustand zeigt, genauer beschrieben werden.The operation of these emergency emptying facilities will be described below with reference to Fig. 1 showing one of them in the activated state will be described in more detail.

In dem Bereich B, in welchem sich die Notentleerungsöffnung 5 befindet, weist der Förderstrang einen etwa ovalen Querschnitt auf. Unterhalb der Notentleerungsöffnung 5 ist an der Außenseite der Wand 6 des Förderstrangs 1 eine Lagereinrichtung 7 vorgesehen, an welcher eine Notentleerungsklappe 8 angelenkt ist, die um eine quer zur Längserstreckung L des Förderstrangs 1 verlaufende Scharnierachse T verschwenkbar ist. Sie kann zwischen einer geschlossenen, die Notentleerungsöffnung 5 vollständig verschließenden Position, in welcher sie mit der Wand 6 des Förderstrangs 1 im Wesentlichen fluchtet, und einer in Fig. 1 dargestellten, geöffneten Position, in welcher sie mit ihrem der Scharnierachse T entfernten Rand 9 innen an der Wand 6 auf der der Notentleerungsöffnung 5 gegenüberliegenden Seite anliegt und mit der Öffnungsebene einen Öffnungswinkel α von etwa 30° bildet, verschwenkt werden.In the region B in which the emergency emptying opening 5 is located, the conveyor strand has an approximately oval cross-section. Below the emergency emptying opening 5, a bearing device 7 is provided on the outside of the wall 6 of the conveyor line 1, to which an emergency emptying flap 8 is articulated, which is pivotable about a transversely to the longitudinal extent L of the conveyor line 1 extending hinge axis T. It can between a closed, the emergency emptying opening 5 completely closing position, in which it is substantially flush with the wall 6 of the conveyor line 1, and a in Fig. 1 shown, open position in which it lies with its the hinge axis T remote edge 9 inside the wall 6 on the opposite side of the emergency emptying opening 5 and forms an opening angle α of about 30 ° with the opening plane, are pivoted.

Zur Schwenkbetätigung zwischen der geschlossenen und der geöffneten Position ist eine wasserhydraulisch betriebene Kolben/Zylinderanordnung 10 vorgesehen. Sie greift mit ihrer Kolbenstange 12 über einen von der Oberfläche der Notentleerungsklappe 8 etwa senkrecht vorstehenden Hebel 11 an der Notentleerungsklappe 8 an. Das zylinderseitige Ende der Kolben/Zylinderanordnung 10 ist an einem Lagervorsprung 13 wiederum außen an der Wand 6 befestigt.For the pivoting operation between the closed and the open position, a water-hydraulically operated piston / cylinder arrangement 10 is provided. It engages with its piston rod 12 via one of the surface of the emergency emptying flap 8 approximately perpendicular projecting lever 11 to the emergency emptying flap 8. The cylinder-side end of the piston / cylinder assembly 10 is in turn attached to a bearing projection 13 on the outside of the wall 6.

In dem Ringraum zwischen der Kolbenstange 12 und dem Zylinderraum 14 ist eine Druckfeder 15 angeordnet. Sie bewirkt, dass die Kolbenstange in ihre zurückgezogene Position, in welcher die Notentleerungsklappe 8 mit der Wand 6 fluchtet und somit die Notentleerungsöffnung 5 verschließt, gelagert ist, wenn der Zylinderraum nicht mit unter Druck stehendem Wasser beaufschlagt ist.In the annular space between the piston rod 12 and the cylinder chamber 14, a compression spring 15 is arranged. It causes the piston rod in its withdrawn Position in which the emergency emptying flap 8 is aligned with the wall 6 and thus closes the emergency emptying opening 5, is stored when the cylinder chamber is not acted upon by pressurized water.

In dieser in Fig. 1 dargestellten Position der Notentleerungsklappe wird abgebauter Meeresgrund in Form von Feststoffpartikeln 16, die durch die in Fig. 1 dargestellten Kreise symbolisiert werden sollen, beim Absinken infolge eines Ausfalls oder einer Unterbrechung des Strömungstransports im Sinne der Pfeile P infolge des Absinkens nach außen in die Umgebung des Förderstranges 1 gelenkt. Da - wie bereits weiter oben beschrieben - eine typische Sinkgeschwindigkeit des abgebauten Meeresgrundes hierbei bei ca. 0,5 m/sec liegt, ist mit einer Anhäufung des abgesunkenen Meeresgrundes in der Umgebung des unteren Endes des Förderstranges 1 nicht zu rechnen, da bereits geringe, außerhalb des Förderstranges herrschende Meeresströmungen zu einer großflächigen Verteilung führt.In this in Fig. 1 shown position of the emergency emptying flap is degraded seabed in the form of solid particles 16, by the in Fig. 1 Circles are symbolized to be steered when sinking due to a failure or interruption of the flow transport in the direction of the arrows P due to the sinking outward into the environment of the conveyor line 1. Since - as already described above - a typical rate of descent of the mined seabed here is about 0.5 m / sec, is not to expect an accumulation of the sunken seabed in the vicinity of the lower end of the conveyor line 1, since already low, outside the conveyor line prevailing ocean currents leads to a large-scale distribution.

Die zur wasserhydraulischen Betätigung der Kolben/Zylinderanordnung 10 und der Notentleerungsklappe 8 vorgesehene Vorrichtung wird nachfolgend unter Bezugnahme auf Fig. 2 genauer beschrieben.The apparatus provided for water hydraulic operation of the piston / cylinder assembly 10 and the emergency discharge door 8 will be described below with reference to FIG Fig. 2 described in more detail.

In Fig. 2 ist mit O die Meerwasseroberfläche bezeichnet. Zur Betätigung sind die Zylinderräume 14 der Kolben/Zylinderanordnungen 10 über Zuleitungen 17 mit einer Hydraulikleitung 18 verbunden. Wie aufgrund der schematischen Schnittdarstellung in Fig. 2 der Kolben/Zylinderanordnungen 10 erkennbar ist, wirkt die Druckfeder 15 bei dem Ausführungsbeispiel gemäß Fig. 2 auf den Kolbenboden auf der der Kolbenstange 12 gegenüberliegenden Seite. Dementsprechend sind die Zylinderräume von dem die Kolbenstange umgebenden Ringraum gebildet. Diese gegenüber dem Ausführungsbeispiel gemäß Fig. 1 umgekehrte Ausgestaltung der Kolben/Zylinderanordnungen hat den Vorteil eines geringeren mit Hydraulikflüssigkeit gefüllten Zylindervolumens, so dass bei einem aufgrund der Wirkung der Druckfedern 50 bewirkten Zurückverlagern der Kolben und auch zur Verlagerung der Kolben aufgrund wasserpneumatischen- Drucks lediglich geringere Wassermengen transportiert werden müssen, wodurch sich die Betätigungszeiten verringern lassen.In Fig. 2 O is the seawater surface. For actuation, the cylinder chambers 14 of the piston / cylinder assemblies 10 are connected via supply lines 17 to a hydraulic line 18. As due to the schematic sectional view in Fig. 2 the piston / cylinder assemblies 10 can be seen, the compression spring 15 acts according to the embodiment Fig. 2 on the piston head on the piston rod 12 opposite side. Accordingly, the cylinder chambers are formed by the annular space surrounding the piston rod. This compared to the embodiment according to Fig. 1 reverse configuration of the piston / cylinder assemblies has the advantage of a smaller filled with hydraulic fluid cylinder volume, so that in a caused due to the action of the compression springs 50 rearward displacement of the piston and also for displacement of the piston due to water-pneumatic pressure only smaller amounts of water must be transported, causing the Reduce operating times.

Die Hydraulikleitung 18 ist über ein Schaltventil 19 mit einem Wasserreservoir 20 hydraulisch verbunden. Zwischen dem Schaltventil 19 und dem Wasserreservoir 20 ist eine Messeinrichtung 21 eingeschaltet, mittels welcher die Durchflussmenge und der Druck, unter dem das innerhalb der Hydraulikleitung 18 befindliche Wasser steht, gemessen werden kann.The hydraulic line 18 is hydraulically connected via a switching valve 19 to a water reservoir 20. Between the switching valve 19 and the water reservoir 20, a measuring device 21 is turned on, by means of which the flow rate and the pressure under which the water located within the hydraulic line 18, can be measured.

Das Wasserreservoir 20 umfasst einen Drucktank 22. Dieser ist bis zu einem Füllstand 23 mit Wasser gefüllt. Oberhalb des Füllstands 23 befindet sich ein frei beweglicher Kolben 38, auf den ein Druckluftpolster wirkt, welches mit Hilfe eines Hochdruck-Kolbenkompressors 24, der über Hochdruck-Luftspeicher 25 mit dem Drucktank 22, auch "Kolbenakku" bezeichnet, verbunden ist, erzeugt wird. In die Zuleitung zum Drucktank 22 sind ein Druckmessgerät 26 und ein Überdruckventil 27 eingeschaltet. Mit entsprechenden Einrichtungen 28 ist auch die zwischen dem Hochdruck-Kolbenkompressor und den Hochdruck-Luftspeichern verlaufende Druckleitung ausgerüstet.The water reservoir 20 includes a pressure tank 22. This is filled to a level 23 with water. Above the level 23 is a freely movable piston 38, on which a compressed air cushion acts, which is connected by means of a high-pressure piston compressor 24, the high-pressure air reservoir 25 to the pressure tank 22, also called "piston battery" is generated. In the supply line to the pressure tank 22, a pressure gauge 26 and a pressure relief valve 27 are turned on. With appropriate means 28 and the running between the high-pressure piston compressor and the high-pressure accumulator pressure line is equipped.

Das Wasserreservoir 20 umfasst des Weiteren einen Süßwassertank 29, aus dem über eine mit Hilfe eines Rückschlagventils 30 gegen Rückfluss gesicherte Leitung durch eine Hochdruckwasserpumpe 31 druckbeaufschlagtes Wasser in den Drucktank 22 gepumpt werden kann, um den gewünschten Füllstand 23 zu erreichen bzw. aufrechtzuerhalten. In die Druckleitung zwischen der Hochdruckwasserpumpe 31 und der Hydraulikleitung 18 ist ein zum Süßwassertank führender Bypass 32 eingeschaltet, welcher mit dieser Leitung über einen Absperrhahn 33 und ein Überdruckventil 34 verbunden ist.The water reservoir 20 further comprises a fresh water tank 29 from which pressurized water can be pumped through a high pressure water pump 31 into the pressure tank 22 via a line secured against backflow by a check valve 30 to achieve or maintain the desired level 23. In the pressure line between the high-pressure water pump 31 and the hydraulic line 18, a leading to the fresh water tank bypass 32 is turned on, which is connected to this line via a stopcock 33 and a pressure relief valve 34.

Wird ein Ausfall oder eine Unterbrechung des Strömungstransports in dem Förderstrang 1 festgestellt, so führt die Auslösung eines das Schaltventil 19 aktivierenden Notschalters 35, der manuell oder über geeignete, in der Zeichnung nicht dargestellte Sensoren, die den Förderstrom in dem Förderstrang 1 messen, betätigt wird, dazu, dass das Schaltventil 19 in die Schalterstellung III verlagert wird. In dieser Schalterstellung ist die Hydraulikleitung 18 mit dem Drucktank 22 verbunden. Aufgrund der Druckerhöhung strömt Wasser in die Zylinderräume 14 der Kolbenzylinderanordnungen 10 und betätigt diese entgegen der Wirkung der Druckfedern 15, was zum Öffnen der Notentleerungsklappen führt. Herabsinkende Feststoffpartikel werden - wie weiter oben beschrieben - seitlich durch die Notentleerungsöffnungen 5 nach außen verlagert.If a failure or interruption of the flow transport in the conveyor line 1 is detected, the triggering of the switching valve 19 activating emergency switch 35, which is operated manually or via suitable, not shown in the drawing sensors that measure the flow rate in the conveyor line 1, is actuated , that the switching valve 19 is displaced into the switch position III. In this switch position, the hydraulic line 18 is connected to the pressure tank 22. Due to the pressure increase water flows into the cylinder chambers 14 of the piston-cylinder assemblies 10 and actuates them against the action of the compression springs 15, which leads to the opening of the emergency emptying flaps. Descending solid particles are - as described above - laterally displaced by the emergency discharge openings 5 to the outside.

Zum Verschließen der Notentleerungsöffnungen wird das Schaltventil 19 durch geeignete Mittel in die Schalterstellung II gebracht. In dieser ist die Zuleitung vom Drucktank 22 von der Hydraulikleitung 18 geschlossen. Die Hydraulikleitung ist zur Umgebung bzw. zu einem Süßwasserreservoir, bei welchem es sich um den Süßwassertank 29 handeln kann, geöffnet. Aufgrund der mit den Druckfedern 15 erzeugten Rückstellkräfte werden mit Hilfe der Kolbenstangen 12 die Notentleerungsklappen 8 in die Schließposition gebracht. Nach Erreichen dieser wird das Schaltventil 19 in die in Fig. 2 dargestellte Ruhestellung I verlagert, in welcher die Hydraulikleitung 18 über ein gegen den vom Wasserreservoir bereitgestellten, wasserhydraulischen Druck öffnendes Rückschlagventil mit einem Süßwasserreservoir 29 verbunden ist.To close the emergency emptying openings, the switching valve 19 is brought by suitable means in the switch position II. In this, the supply line from the pressure tank 22 is closed by the hydraulic line 18. The hydraulic line is open to the environment or to a fresh water reservoir, which may be the fresh water tank 29. Due to the restoring forces generated by the compression springs 15, the emergency emptying flaps 8 are brought into the closed position with the aid of the piston rods 12. After reaching this, the switching valve 19 is in the in Fig. 2 illustrated rest position I shifts in which the hydraulic line 18 is connected via a against the water reservoir provided by the water hydraulic pressure-opening check valve with a fresh water reservoir 29.

Die Hydraulikleitung 18 weist gegenüber der Umgebung ein freies Ende 36 auf. Es ist über ein Rückschlagventil 37, welches gegen den innerhalb der Hydraulikleitung 18 herrschenden Druck zu öffnen ist, verschlossen.The hydraulic line 18 has a free end 36 with respect to the environment. It is closed by a check valve 37 which is to be opened against the pressure prevailing within the hydraulic line 18 pressure.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Förderstrangproduction string
22
InnendurchmesserInner diameter
33
InneresInterior
44
NotentleerungseinrichtungenNotentleerungseinrichtungen
55
NotentleerungsöffnungNotentleerungsöffnung
66
Wandwall
77
LagereinrichtungStorage facility
88th
NotentleerungsklappeNotentleerungsklappe
99
Randedge
1010
Kolben/ZylinderanordnungPiston / cylinder assembly
1111
Hebellever
1212
Kolbenstangepiston rod
1313
Lagervorsprungbearing projection
1414
Zylinderraumcylinder space
1515
Druckfedercompression spring
1616
FeststoffpartikelSolid particles
1717
Zuleitungenleads
1818
Hydraulikleitunghydraulic line
1919
Schaltventilswitching valve
2020
Wasserreservoirwater reservoir
2121
Messeinrichtungmeasuring device
2222
Drucktankpressure tank
2323
Füllstandlevel
2424
Hochdruck-KolbenkompressorHigh-pressure piston compressor
2525
Luftspeicherair storage
2626
Druckmessgerätpressure monitor
2727
ÜberdruckventilPressure relief valve
2828
Einrichtungenfacilities
2929
SüßwassertankFresh water tank
3030
Rückschlagventilcheck valve
3131
Hochdruck-WasserpumpeHigh-pressure water pump
3232
Bypassbypass
3333
Absperrhahnstopcock
3434
ÜberdruckventilPressure relief valve
3535
NotschalterEmergency switch
3636
EndeThe End
3737
Rückschlagventilcheck valve
αα
Öffnungswinkelopening angle
FF
Förderrichtungconveying direction
LL
Längserstreckunglongitudinal extension
OO
Oberflächesurface
PP
Pfeilearrows
SS
Pfeilarrow
TT
Scharnierachsehinge axis

Claims (6)

  1. Device for removing sea bed,
    having a conveying line (1) which is at least partially surrounded by sea water and through which removed sea bed (16) can be transported to the surface (O) in the conveying direction, wherein
    the conveying line (1) comprises an emergency emptying device (4), by means of which removed sea bed (16) moving counter to the conveying direction (S) can be discharged from the conveying line (1) into the sea water, wherein the emergency emptying device (4) comprises at least one optionally openable or closable emergency emptying opening (5) which, for opening said emergency emptying opening, has an emergency emptying flap (8) which can be displaced into the interior of the conveying line (1) in such a way that removed sea bed (16) moving counter to the conveying direction can be discharged into the sea water through the emergency emptying opening (5) under the action of the emergency emptying flap (8), wherein a piston/cylinder arrangement (10), which can be actuated water-hydraulically, is provided for displacing the emergency emptying flap (8), characterized in that a water reservoir (20), which provides the water-hydraulic pressure, is provided.
  2. Device according to claim 1, characterized in that a plurality of emergency emptying openings (5), which are preferably arranged distributed at regular intervals over the length of the conveyor line (1), are provided.
  3. Device according to claim 2, characterized in that the intervals are between 200 m and 700 m, preferably between 400 m and 500 m.
  4. Device according to one of claims 1 to 3, characterized in that the piston/cylinder arrangement (10) is spring-force-loaded in such a way that it effects the closed position of the emergency emptying flap (8) when water-hydraulic pressure is not applied.
  5. Device according to one of claims 1 to 4, characterized in that to the water reservoir (20) includes a hydraulic line (18) having preferably a free end which is closed by a non-return valve (37) and to which the piston/cylinder arrangement (10) are connected for the purpose of actuating against the spring force.
  6. Device according to claim 5, characterized in that a switching valve (19), with which the following switching positions can be effected, is provided between the water reservoir (20) and the hydraulic line (18):
    - Isolation of the water reservoir (20) from the hydraulic line (18) by means of a non-return valve which opens against the water-hydraulic pressure provided by the water reservoir;
    - Connection of the water reservoir (20) to the hydraulic line (18);
    - Isolation of the water reservoir (20) from the hydraulic line (18) and closing of the water reservoir (20) and opening of the hydraulic line (18) to the environment.
EP12737288.6A 2011-08-05 2012-07-19 Device for removing sea bed Active EP2739793B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011052429.0A DE102011052429B4 (en) 2011-08-05 2011-08-05 Device for mining seabed
PCT/EP2012/064199 WO2013020788A1 (en) 2011-08-05 2012-07-19 Device for removing sea bed

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EP2739793A1 EP2739793A1 (en) 2014-06-11
EP2739793B1 true EP2739793B1 (en) 2015-12-30

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US (2) US9080309B2 (en)
EP (1) EP2739793B1 (en)
DE (1) DE102011052429B4 (en)
WO (1) WO2013020788A1 (en)

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CN112267512B (en) * 2020-10-15 2022-02-25 赵文玲 Ditch silt cleaning device for forestry

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Publication number Priority date Publication date Assignee Title
US3283772A (en) * 1964-02-04 1966-11-08 Donald G Griswold Backflow prevention device with improved pressure sensing means
US3307576A (en) * 1964-04-10 1967-03-07 Newport News S & D Co Automatic dump valve
US3318327A (en) * 1964-04-10 1967-05-09 Newport News S & D Co Automatic dump valve
DE2008384A1 (en) * 1970-02-24 1971-09-02 Bade P Double tube conveyor system
US3945394A (en) * 1975-03-21 1976-03-23 The International Nickel Company, Inc. Pressure-responsive valve
US4300585A (en) * 1979-07-19 1981-11-17 Sedco, Inc. Automatic dump valve
JPS6019197Y2 (en) * 1980-03-07 1985-06-10 日立造船株式会社 Equipment for collecting seabed manganese, etc.
JPS6010093A (en) * 1983-06-29 1985-01-19 工業技術院長 Mineral particle grous discharge apparatus
US4555333A (en) * 1984-02-09 1985-11-26 Laval Claude C Self-purging separator
JPS61196098A (en) * 1985-02-23 1986-08-30 アイ・デイ・シ−株式会社 Ore mining apparatus
JPH0654074B2 (en) * 1992-02-21 1994-07-20 アイ・デイ・シー株式会社 Jet pump device
US5491913A (en) * 1994-08-23 1996-02-20 Pearce Pump Supply, Inc. Control system for the suction line relief valve of a hydraulic dredge
US7185953B1 (en) * 2005-08-25 2007-03-06 Tymco, Inc. Surface sweeping machine with a dump door and chute actuating mechanism
KR101183443B1 (en) * 2010-03-02 2012-09-17 한국지질자원연구원 velocity and concentration adjustable coupling pipe apparatus equipped between lifting pipe and collector

Also Published As

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DE102011052429B4 (en) 2014-03-06
EP2739793A1 (en) 2014-06-11
WO2013020788A1 (en) 2013-02-14
US9080309B2 (en) 2015-07-14
DE102011052429A1 (en) 2013-02-07
US20140165430A1 (en) 2014-06-19
US20150176244A1 (en) 2015-06-25

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