Arrangement for treating open waters and adapter element of a buoyancy nozzle rod assembly

Abstract

Arrangement for the water treatment of open waters, comprising: a floating platform (2), a buoyancy nozzle rod (3, 3') suspended from the platform (2), which defines a longitudinal axis (L) and has at least one buoyancy nozzle (4) via which a buoyancy agent can be introduced into areas of the open water lying below the water surface, so that foreign substances, such as plastic particles, are driven from the areas lying below the water surface to the surface of the open water, and a collecting arrangement (5) with which the foreign substances can be collected from the surface of the open water, characterized in that the lift nozzle rod assembly (3, 3') comprises at least two rod elements (6) which are connected to one another via an adapter element (7), wherein the adapter element (7) has two connections (30) for connecting to one of the rod elements (6) in each case.

Description

[0001] The invention relates to an arrangement for treating open waters and an adapter element of a buoyancy nozzle rod. Only a small portion of foreign substances, such as plastic particles that pollute open waters, settle on the water surface. The majority of foreign substances, however, accumulate in areas below the water surface, even at great depths. Well-known examples of such contamination by plastics are so-called garbage patches in the North Pacific, the South Pacific, the Indian Ocean, the North Atlantic, and the South Atlantic. Aquatic organisms ingest the plastics, and via the food chain, they also enter the human organism. To reduce this effect, in addition to preventing additional contamination in open waters, especially in the world's oceans, the foreign substances previously introduced into the open waters must be filtered out.

[0002] For this purpose, a collection system for collecting objects floating on or near a water surface is known from NL 2019839 B1. The collection system can move freely along the water surface. For collecting the objects, the collection system comprises a floating barrier to which a first section, which is submerged in the water, and a second section, which is arranged above the water surface, are attached. Ocean currents act on the first section, and wind acts on the second section, so that the floating barrier moves at a speed relative to the water surface, allowing the objects near the water surface to be collected.

[0003] The document DE 10 2010 026 168 A1 discloses a device for removing solids and / or droplets from a body of water. Water and a gas under increased pressure can be fed to a pressure vessel and has an outlet line through which the water with the gas dissolved therein can be removed from the pressure vessel. Via an expansion valve connected to the outlet line, the water with the gas dissolved therein can be expanded to form gas bubbles. A conveying device conveys flotate collecting on the water surface, consisting of solids and / or droplets to be removed and coupled to the gas bubbles, into a collecting container. The pressure vessel is arranged on a floating body. At least one outlet opening connected to the expansion valve, through which the water and the gas bubbles can escape, is arranged in the body of water at a predeterminable depth below the water surface.The conveying device is arranged in such a way that the flotate can be removed directly from the water surface of the body of water.

[0004] Based on this, the present invention is based on the object of providing an arrangement for the treatment of open waters which enables the collection of foreign substances from great depths.

[0005] The object is achieved by an arrangement according to claim 1. The arrangement for treating open waters comprises a floating platform, a buoyancy nozzle rod suspended from the platform, which defines a longitudinal axis and has at least one buoyancy nozzle, via which a buoyancy agent can be introduced into the areas of the open water lying below the water surface, so that foreign substances, such as plastic particles, are driven from the areas lying below the water surface to the surface of the open water, and a collecting arrangement with which the foreign substances can be collected from the surface of the open water.

[0006] The arrangement according to the invention has the advantage that foreign matter suspended in the water over a large depth range experiences buoyancy and is thus driven to the water surface, where it can be collected by the arrangement. Foreign matter within the meaning of the disclosure is solids that do not dissolve, such as plastic particles or tar lumps from crude oil or mineral oil products. A further positive effect of treatment with the arrangement is the aeration of the water body by circulating water masses. The buoyancy nozzle rod is constructed like a drill rod and can be extended as required to reach corresponding depth ranges. The drive nozzle rod can have a weight at its lower end.

[0007] According to the invention, the lift nozzle rod assembly comprises at least two rod elements which are connected to one another via an adapter element, wherein the adapter element has two connections for connecting to one of the rod elements each, and wherein the connections are connected via an adapter channel running in the direction of the longitudinal axis for conducting the buoyancy medium. The adapter element can thus also be referred to as a coupling element. The adapter element can have an internal thread at a first end and an external thread at a second end, wherein the internal thread of the adapter element engages in a complementarily designed external thread of one of the at least two rod elements, and the external thread of the adapter element engages in a complementarily designed internal thread of another of the at least two rod elements. The adapter element can also have the at least one lift nozzle of the lift nozzle rod assembly.The number of rod elements to be connected can be selected as required depending on the depth of the water body or the desired treatment depth.

[0008] The arrangement according to the invention may comprise one or more buoyancy nozzle rods suspended from the buoyant platform.

[0009] In a further possible embodiment of the arrangement, the buoyancy nozzle rod assembly can have at least one rotatably mounted retaining element, to which a clamping element is attached for positioning the buoyancy nozzle rod assembly relative to the platform. The clamping element can also support forces acting on the buoyancy nozzle rod assembly, for example, from the current in the open water, thereby reducing the load on the buoyancy nozzle rod assembly. The at least one rotatably mounted retaining element can be rotatably mounted on the adapter element. The at least one rotatably mounted retaining element can be designed, for example, in the form of a fastening tab.

[0010] The buoyancy nozzle rod assembly can be suspended from the platform so that it can be displaced along the longitudinal axis, in particular so that its height can be adjusted. In another possible embodiment, several buoyancy nozzle rod assembly can be provided on the platform. A buoyancy zone can be formed between the several buoyancy nozzle rod assembly.

[0011] In a further embodiment, the arrangement can comprise a plurality of lift nozzles, with at least a portion of the plurality of lift nozzles being oriented toward the lift zone. The lift nozzles of the portion of the plurality of lift nozzles can be arranged radially around the longitudinal axis of the lift nozzle rod assembly in an angular range defined by connecting planes to the two adjacent lift nozzle rod assembly. The at least one lift nozzle can comprise a nozzle element that is screwed into the lift nozzle rod assembly, in particular into the adapter element.

[0012] In a further embodiment, the at least one lift nozzle can have an exit angle of less than 90° relative to the longitudinal axis of the lift nozzle rod assembly, wherein one or more openings of the lift nozzle are directed upwards in the installed state, for example, in the direction of a bearing arrangement from which the lift nozzle rod assembly is suspended. If the arrangement comprises multiple lift nozzles, the angles of the lift nozzles relative to the longitudinal axis of the lift nozzle rod assembly can be the same, or the angles can be selected differently for each lift nozzle. In this case, it is particularly possible for the lift nozzles directed toward the lift zone to have a different angle than the remaining lift nozzles.

[0013] In a further embodiment, the adapter element can have at least one suspension for a nozzle arm with a plurality of lift nozzles, wherein each suspension defines a rotation axis and wherein the nozzle arm is attached to the respective suspension so as to be rotatable about the rotation axis. The rotation axis is arranged, for example, approximately perpendicular to the longitudinal axis. For example, four suspensions for four nozzle arms can be provided, which are each arranged offset by 90 degrees around the adapter element. The suspension has a pressure channel so that the nozzle arm can be fed with the lift fluid from an adapter channel of the adapter element via the pressure channel. Accordingly, the nozzle arm also has a supply channel connected to the pressure channel, to which the lift nozzles are connected.The suspension may include a stop to limit movement of the nozzle arm about the rotational axis to a range between one position and a second position, wherein the nozzle arm extends substantially parallel to the longitudinal axis in the first position and substantially perpendicular to the longitudinal axis in the second position. The buoyancy nozzles of the nozzle arm are oriented downward in the second position when installed. The exiting buoyancy medium moves the nozzle arms from the first position to the second position. When the buoyancy nozzle rod is sunk, the nozzle arms are in the first position to reduce drag.

[0014] In a further embodiment, the collection arrangement may comprise at least one conveyor belt that partially submerges into the open water. In this case, it is particularly conceivable for the conveyor belt to submerge into the open water in the area of ​​the upwelling zone.

[0015] Furthermore, a buoyant barrier ring can be provided that at least partially surrounds the platform. The barrier ring can be either closed or designed as a ring segment. If the barrier ring is designed as a ring segment, the opening of the barrier ring can open, in particular, in a direction of travel of the arrangement that corresponds to forward travel. Collection boats can also be deployed within the barrier ring to collect the foreign matter.

[0016] The barrier ring may comprise a plurality of nozzles which are arranged below the water surface of the open water and which are in particular aligned perpendicular to the longitudinal axis of the buoyancy nozzle rod and / or which are directed radially inward and / or which are directed in the direction of the buoyancy zone.

[0017] The buoyancy agent can be a gas or gas mixture, especially air, or high-pressure water. The buoyancy agent can, in particular, have a lower density than water. For example, seawater from open waters can be used advantageously.

[0018] Another object that solves the problem consists of an adapter element of a buoyancy nozzle rod assembly for introducing a buoyancy agent into open water. The adapter element has two connectors for connecting to a rod assembly, each of which defines a longitudinal axis, as well as at least one suspension for a nozzle arm with multiple buoyancy nozzles. Each suspension defines a rotation axis, and the nozzle arm is attached to the respective suspension so that it can rotate about the rotation axis.

[0019] According to one embodiment of the adapter element, the connections can be connected via a longitudinally extending adapter channel for conducting the buoyancy fluid, wherein the at least one suspension has a pressure channel connected to the adapter channel, wherein the nozzle arm is supplied with the buoyancy fluid from an adapter channel via the pressure channel. The at least one suspension can furthermore have a stop to limit movement of the nozzle arm about the axis of rotation to a range between a first position and a second position, wherein the nozzle arm extends substantially parallel to the longitudinal axis in the first position and substantially perpendicular to the longitudinal axis in the second position. In the first position, the four nozzle arms, for example, can be sunk into the water with little resistance.Due to the buoyancy nozzles of the nozzle arm being oriented downwards in the second position when installed, the nozzle arms are moved from the first to the second position by the escaping buoyancy fluid.

[0020] According to a further embodiment of the adapter element, the at least one suspension is mounted so as to be rotatable about the longitudinal axis. For this purpose, for example, at least one of the connections can be mounted so as to be rotatable about the longitudinal axis relative to the adapter element. Alternatively, the adapter element can have at least two adapter sections arranged adjacently in the longitudinal direction, which are detachably connected to one another. A rotary sleeve can be rotatably mounted on a tubular section of a first adapter section. In the longitudinal direction, the rotary sleeve is fixed, for example, between stops on the top of the first adapter section and on the bottom of a second adapter section. The buoyancy fluid enters the suspension via an annular space formed between the rotary sleeve and the first adapter element.

[0021] The described embodiments of the adapter element can be embodiments of the arrangement for treating open waters.

[0022] Examples of embodiments are explained below using the drawings. Herein: Fig. 1 shows an arrangement according to the invention for treating open waters in a schematic front view; Fig. 2 the arrangement Fig. 1 in a schematic side view; Fig. 3 the arrangement Fig. 1 in a schematic plan view; Fig. 4 the adapter element of the arrangement Fig. 1 in a schematic sectional view; Fig. 5 the retaining elements of the adapter element Fig. 4; Fig. 6 an embodiment of an adapter element according to the invention in a longitudinal section; Fig. 7 the adapter element from Fig. 6 in a perspective view; Fig. 8 the adapter element Fig. 6 with nozzle arms in a first position; Fig. 9 a detail from Fig. 8; Fig. 10 a longitudinal section of the detail Fig. 9; Fig. 11 the adapter element from Fig. 8 with nozzle arms in a second position in a side view; Fig. 12 the adapter element Fig. 11 with nozzle arms in a second position in a plan view; Fig. 13 a detail from Fig. 11; Fig. 14 a detail from Fig. 12; Fig. 15 a cut according to Fig. 14; Fig. 16 shows a further embodiment of the adapter element according to the invention in a perspective view; Fig. 17 the adapter element from Fig. 16 in a side view; Fig. 18 a section along the line AA in Fig. 17 in enlarged view.

[0023] The Fig. Figures 1 to 5, which are described together below, show an arrangement 1 according to the invention for treating open waters, for example, for removing plastic from areas below the water surface of open waters. The arrangement 1 comprises a floating platform 2, which has a first working platform 15, a second working platform 15', a collecting arrangement 5, and a bunker 16 for receiving the collected plastic contaminants.

[0024] The first work platform 15 and the second work platform 15' each have a bearing arrangement 17, 17' from which a lift nozzle rod assembly 3, 3' is suspended. The suspension is effected via tension elements 25, 25', so that the lift nozzle rod assembly 3, 3' is held vertically movable. A lift zone A is formed between the two lift nozzle rod assembly 3, 3'.

[0025] In the present case, the two buoyancy nozzle rods 3, 3' each comprise four adapter elements 7, which are arranged between rod elements 6. It is understood that the invention is not limited to the specific number of adapter elements, but the number can be increased or decreased as required, depending on the water depth to which the arrangement 1 is to be immersed. The adapter elements 7 have an internal thread section 8 and an external thread section 9, as can be seen from Fig. 4. A first end section of a rod element 6 adjacent above is screwed into the internal thread section 8, which is designed complementarily to the internal thread section 8. A second end section of a rod element 6 adjacent below is screwed into the external thread section 9. The direction indication above or below in this case refers only to the explanations of the figures, whereby it is fundamentally possible to swap the assignment of the internal thread section 8 and the external thread section 9.

[0026] The adapter elements 7 each comprise an adapter channel 19, which, together with channel sections (not shown) of the rod elements 6, forms a central supply channel through which a buoyancy agent can be pumped. The buoyancy agent can be a gas or gas mixture, in particular air, or high-pressure water.

[0027] One or more, in this case four, pressure channels 20 branch off from the adapter channel 19 in the adapter element 7. The pressure channels 20 each have a thread on an outer surface of the adapter element 7, into which a nozzle element 4 is screwed. The nozzle element 4 is positioned at an angle α relative to a longitudinal axis L of the lift nozzle rods 3, 3', with a nozzle opening 11 of the nozzle element 4 being oriented in the direction of the bearing arrangement 17, 17'. The angle α can, in particular, be selected to be less than 90°. The angle α can also be selected differently for the individual nozzle elements 4 of an adapter element 7. The buoyancy medium pumped through the central supply channel exits the nozzle element 4 through the nozzle opening 11 and ensures buoyancy around the respective lift nozzle rod 3, 3'. The buoyancy generated draws plastic contaminants to the water surface.

[0028] At an end facing the seabed, the two buoyancy nozzle rods 3, 3' each have a terminal adapter element 7' having a terminal section that closes the central supply channel. It is conceivable that the terminal section of the terminal adapter element 7' is formed instead of one of the threaded sections 8, 9. Alternatively, the terminal section can be formed by a terminal section element that is screwed onto one of the threaded sections 8, 9. A counterweight 18 is attached to the terminal adapter element 7', which increases the inertia of the buoyancy nozzle rods 3, 3' and thus reduces the risk of the buoyancy nozzle rods 3, 3' swinging upwards in the longitudinal direction L or transversely to the longitudinal direction L.

[0029] One or more, in this case two, retaining elements 10, 10' are rotatably mounted on at least some of the adapter elements 7, 7' about the longitudinal axis L of the buoyancy nozzle rods 3, 3'. The retaining elements 10, 10' are designed as fastening tabs in this case. The retaining elements 10, 10' each have a receptacle 22, 22' to which at least one of a transverse securing element 23 and a longitudinal securing element 24 can be fastened. The transverse securing element 23 and the longitudinal securing element 24 can each also be referred to as a tensioning element. The transverse securing elements 23 each connect an adapter element 7, 7' of the first buoyancy nozzle rod 3 and an adapter element 7, 7' of the second buoyancy nozzle rod 3', which are arranged at approximately the same water depth. The longitudinal securing elements 24 each connect an adapter element 7, 7' to a pulling arrangement 21 of the platform 2.Due to the rotatable mounting of the retaining elements 10, 10' relative to the adapter element 7, 7', changes in the position of the buoyancy nozzle rods 3, 3' relative to the platform 2 can be compensated for in such a way that the cross-connecting elements 23 and the longitudinal securing elements 24 are subjected to less tensile stress. The retaining elements 10, 10' can also be designed as fastening eyes.

[0030] The assembly 1 also includes a collecting assembly 5 having a conveyor belt 12. The collecting assembly 5 is immersed in the water in the area of ​​the buoyancy zone A and thus removes the plastic contaminants that have collected in the area of ​​the buoyancy zone A from the water. The collecting assembly 5 then transports the collected plastic into the bunker 16.

[0031] In addition, the arrangement 1 comprises a buoyant barrier ring 13 that at least partially surrounds the platform. It is conceivable that the barrier ring 13 is closed or forms a ring segment that has an opening, in particular in a direction of travel of the arrangement 1. The barrier ring 13 comprises a plurality of nozzles 14 that, when the arrangement 1 is in the floating state, are arranged below the water surface of the open body of water. The nozzles 14 are oriented in particular perpendicular to the longitudinal axis L of the buoyancy nozzle rods 3, 3'. Alternatively, the nozzles 14 can be oriented such that the nozzle jet has at least one active component directed radially inward. As a further alternative, the nozzles 14 can be arranged such that they are oriented in the direction of the buoyancy zone.The flow generated by the nozzles 14 drives plastic contamination accumulated near the surface in the area of ​​the barrier ring in the direction of the buoyancy zone A or in the direction of the collecting arrangement 5.

[0032] The Fig. 6 and Fig. 7 show an adapter element 7 according to the invention of a buoyancy nozzle rod assembly 3, 3' for introducing a buoyancy agent into open water and are described together below. The adapter element 7 has two connections 30 for connecting to a rod assembly 6, each of which defines a longitudinal axis L, as well as four suspensions 26 for a nozzle arm (not shown) with a plurality of buoyancy nozzles, each suspension 26 defining an axis of rotation D and the nozzle arm being rotatable about the axis of rotation D and attached to the respective suspension 26. The connections 26 are connected via an adapter channel 19 running in the longitudinal direction L for conducting the buoyancy fluid, the suspensions 26 each having a pressure channel 20 connected to the adapter channel 19, via which pressure channel 20 the nozzle arm is supplied with the buoyancy fluid. The suspensions 26 may further each have a stop 29 to limit movement of the nozzle arm.In this case, the holding elements 10 are designed as fastening eyelets.

[0033] The Fig. Figures 8 to 10, which are described together, show the adapter element 7 with the nozzle arms 27, which are rotatable about the rotation axis D, wherein the rotation is limited to a range between a first position, shown here, and a second position by the stops 29. In the first position, the nozzle arms 27 extend substantially parallel to the longitudinal axis L. In the first position, the four nozzle arms 27 can be sunk into the water with little resistance. The nozzle arms have a cavity 31 extending substantially over their entire length, which is connected to the pressure channel 20 and via which the buoyancy nozzles 28 are supplied with the buoyancy fluid.

[0034] In the Fig. 11 to 15, which are described together, the adapter element 7 is shown with the nozzle arms 27 in the second position, in which the nozzle arms 27 extend substantially perpendicular to the longitudinal axis L. Due to the buoyancy nozzles 28 of the nozzle arm 27, which are oriented downwards in the second position in the installed state, the nozzle arms 27 are adjusted by the escaping buoyancy fluid from the first to the second position, in which a counter-stop 32 on the nozzle arms rests against the stop 29 on the adapter element 7.

[0035] The Fig. 16, Fig. 17 and Fig. 18 show a further embodiment of the adapter element 7 according to the invention of the buoyancy nozzle rod 3, 3' for introducing buoyancy agents into open waters and are described together below. The embodiment largely corresponds to the embodiment according to Fig. 6. Identical parts have identical reference numerals and will not be described in detail again. Reference is made to the explanations for Fig. 6. The adapter element 7 has two connections 30 for connecting to a rod element 6 each, which define the longitudinal axis L, as well as four suspensions 26 for a nozzle arm each (not shown). The adapter element 7 is constructed in several parts, comprising a first adapter section 34, a second adapter section 37 and a rotary sleeve 33. The first and second adapter sections 34, 37 are detachably connected to one another by fastening means 38. The rotary sleeve 33 is rotatably mounted on a tubular section of the first adapter section 34 and is axially fixed in the direction of the longitudinal axis L between stops on the first adapter section 34 at the top and on the second adapter section 37 at the bottom. Between the first adapter section 34 and the rotary sleeve 33, an annular space 35 is formed, through which the buoyancy medium passes from the adapter channel 19 via bores 36, and from where the buoyancy medium passes further into the pressure channels 20 of the suspensions 26.The suspensions 26 with the nozzle arms 27 can rotate around their longitudinal axis with the rotary sleeve 33. This advantageously prevents the introduction of torsional forces into the rod element 6 due to cross currents in the water.

[0036] The described embodiments of the adapter element can be embodiments of the arrangement for treating open waters according to the Fig. 1 to 5. List of reference symbols 1 arrangement 2 Platform 3, 3' lift nozzle rods 4 buoyancy nozzle 5 Collection arrangement 6 rod element 7 Adapter element 8 internal threads 9 external threads 10 Holding element 11 Nozzle opening 12 Conveyor belt 13 Barriering 14 nozzle 15, 15' work platform 16 bunkers 17, 17' bearing arrangement 18 Counterweight 19 adapter channel 20 pressure channels 21 Train arrangement 22 recording 23 Cross-guard element 24 Longitudinal securing element 25, 25' tension element 26 Suspension 27 Nozzle arm 28 lift nozzles 29 stop 30 connection 31 cavity 32 Counter stop 33 screenplays 34 First adapter section 35 annular space 36 bore 37 Second adapter section 38 fasteners A buoyancy zone L Longitudinal axis D axis of rotation

Claims

[1] Arrangement for the treatment of open waters, comprising: a floating platform (2), a buoyancy nozzle rod (3, 3') suspended from the platform (2), which defines a longitudinal axis (L) and has at least one buoyancy nozzle (4) via which a buoyancy agent can be introduced into areas of the open water lying below the water surface, so that foreign substances, such as plastic particles, are driven from the areas lying below the water surface to the surface of the open water, and a collecting arrangement (5) with which the foreign substances can be collected from the surface of the open water, characterized by , that the lift nozzle rod assembly (3, 3') comprises at least two rod elements (6) which are connected to one another via an adapter element (7), wherein the adapter element (7) has two connections (30) for connecting to one of the rod elements (6) in each case. [2] Arrangement according to claim 1, characterized by that the adapter element (7) has an internal thread (8) at a first end and an external thread (9) at a second end, wherein the internal thread (8) of the adapter element (7) engages in a complementarily designed external thread of one of the at least two rod elements (6), and the external thread (9) of the adapter element (7) engages in a complementarily designed internal thread of a further one of the at least two rod elements (6). [3] Arrangement according to claim 2, characterized by that the adapter element (7) has at least one buoyancy nozzle (4) of the buoyancy nozzle rod (3, 3'). [4] Arrangement according to one of claims 1 to 3, characterized by that the buoyancy nozzle rod assembly (3, 3') has at least one rotatably mounted holding element (10) to which a clamping element (23, 24) for positioning the buoyancy nozzle rod assembly (3, 3') relative to the platform (2) is fastened. [5] Arrangement according to claim 4, characterized by that the at least one rotatably mounted holding element (10) is rotatably mounted on the adapter element (7). [6] Arrangement according to one of claims 1 to 5, characterized by that the at least one buoyancy nozzle (4) has an exit angle of less than 90° relative to the longitudinal axis (L) of the buoyancy nozzle rod (3, 3'), wherein an opening (11) of the buoyancy nozzle (4) is oriented upwards in the installed state. [7] Arrangement according to one of claims 1 to 6, characterized by that the at least one buoyancy nozzle (4) comprises a nozzle element which is screwed into the buoyancy nozzle rod (3, 3'), in particular into the adapter element (7). [8] Arrangement according to one of claims 1 to 7, characterized by that several buoyancy nozzle rods (3, 3') are provided on the platform (2), between which a buoyancy zone (A) is formed. [9] Arrangement according to one of claims 1 to 8, characterized bythat the collecting arrangement (5) comprises at least one conveyor belt (12) which is partially immersed in the open water in the region of the upwelling zone (A). [10] Arrangement according to one of claims 1 to 9, characterized by that the buoyancy nozzle rod (3, 3') is suspended from the platform (2) so as to be displaceable in the direction of the longitudinal axis (L), in particular so as to be height-adjustable. [11] Arrangement according to one of claims 1 to 10, characterized by that a buoyant barrier ring (13) is provided which at least partially surrounds the platform (2). [12] Arrangement according to claim 11, characterized by in that the barrier ring (13) comprises a plurality of nozzles (14) which are arranged below the water surface of the open body of water and which are aligned in particular perpendicular to the longitudinal axis (L) of the buoyancy nozzle rod (3, 3') and / or which are directed radially inwards and / or which are directed in the direction of the buoyancy zone (A). [13] Arrangement according to one of claims 1 to 12, characterized by that the buoyancy agent is a gas or gas mixture, in particular air, or water, for example sea water, under high pressure. [14] Adapter element of a buoyancy nozzle rod for introducing a buoyancy agent into an open body of water, with two connections (30) for connecting to a respective rod element (6), which define a longitudinal axis (L), and with at least one suspension (26) for a nozzle arm (27) with a plurality of lift nozzles (28), wherein each suspension defines an axis of rotation (D) and wherein the nozzle arm is attached to the respective suspension so as to be rotatable about the axis of rotation (D). [15] Adapter element according to claim 14, characterized bythat the connections (30) are connected via an adapter channel (19) running in the longitudinal direction (L) for conducting the buoyancy medium, wherein the at least one suspension (26) has a pressure channel (20) connected to the adapter channel, wherein the nozzle arm (27) is fed with the buoyancy fluid from an adapter channel (19) via the pressure channel. [16] Adapter element according to one of claims 14 or 15, characterized by in that the at least one suspension (26) has a stop (29) for limiting a movement of the nozzle arm (27) about the axis of rotation (D) to a range between a first position and a second position, wherein the nozzle arm extends substantially parallel to the longitudinal axis (L) in the first position and substantially perpendicular to the longitudinal axis (L) in the second position. [17] Adapter element according to claim 16, characterized bythat the buoyancy nozzles (28) of the nozzle arm (27) are oriented downwards in the second position in the installed state. [18] Adapter element according to one of claims 14 to 17, characterized by that the at least one suspension (26) is rotatably mounted about the longitudinal axis (L). [19] Arrangement according to one of claims 1 to 14, characterized by that the lift nozzle rod assembly (3, 3') has at least one adapter element (7) according to one of claims 14 to 18.

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