Device for aerating water

Abstract

Device for aerating waters, comprising: - a compressed air source 2, - a compressed air distributor 4 connected to the compressed air source 2 via a compressed air line 3, - a support element 5 arranged on the compressed air distributor 4, wherein the support element 5 holds the compressed air distributor 4 in the water, and - at least one aeration arm 6 mounted on the compressed air distributor 4, rotatable about the axis of rotation D, with at least one nozzle 7 for releasing compressed air into the water, wherein the compressed air is directed from the compressed air distributor 4 to the nozzle 7 via the aeration arm 6.

Description

[0001] The invention relates to a device for aerating waters, in particular standing waters, with a compressed air source and a compressed air distributor which can be arranged in the water and is connected to the compressed air source via a compressed air line.

[0002] Devices of the type mentioned above can be used to supply anaerobic waters, such as lakes or ponds, with air and especially oxygen.

[0003] Known devices for introducing air into standing waters, such as a garden pond, have a compressed air source and a compressed air distributor.

[0004] For example, DE 295 07 659 U1 discloses a water aerator with an integrated solar module and an electric air pump driven by the solar module for drawing in atmospheric air and introducing it into the water body via a discharge hose. The water aerator is designed as a floating unit and has a housing that supports or contains the solar module and houses the air pump and optionally other electrical components.

[0005] From DE 20 23 981 A, a method for the continuous circulation and aeration of a liquid and a device for carrying out the method are known. The compressed air is supplied through a line to a cylindrical housing in which a vertical hollow distributor shaft of an air distributor is rotatably mounted in a longitudinal and transverse bearing arranged within the housing. The hollow distributor shaft is provided at its lower free end with a distributor head to which four identical, tubular distributor arms are screwed in a liquid- and airtight manner. Nozzles are provided laterally at equal intervals on the distributor arms, which allow the compressed air to exit into the liquid. The distributor is set in rotation or held in rotation by the air exiting into the liquid.

[0006] DE 30 34 763 A1 discloses a method for aerating a liquid and a device for carrying out the method. The device comprises an aeration unit with a hollow shaft driven by a geared motor. Air is forced into the hollow shaft via a line connected to a compressed air generator. The aeration unit has aeration elements at the lower end of the hollow shaft, which extend radially from the hollow shaft and are arranged in a star shape. The aeration elements have a wall that can be made of a ceramic material or a quartz sand-resin mixture and has small gas-permeable pores.

[0007] EP 0 122 506 A1 relates to a device for supplying air to a liquid. The device consists of a plurality of distribution pipes radially connected to a central, rotatable pipe which is closed at its upper end. The radially arranged distribution pipes are provided with holes or nozzles oriented perpendicular to the distribution pipes in the horizontal plane. The rotatable pipe connected to the distribution pipes is mounted on a stationary pipe which is connected to a pressurized gas source. When compressed air is introduced from the stationary pipe into the distribution pipes, the compressed air escapes through the holes or nozzles and imparts a rotary motion to the device.

[0008] The present invention is based on the objective of providing a low-maintenance device that enables simple and reliable aeration of stagnant waters.

[0009] The problem is solved by a device for aerating stagnant waters with a compressed air source and a compressed air distributor that can be arranged in the water body via a compressed air line. According to the invention, the device has a support element arranged on the compressed air distributor that holds the distributor in the water body. Furthermore, the device has at least one aeration arm, rotatable about its axis of rotation, mounted on the compressed air distributor and having at least one nozzle for releasing the compressed air into the water body. According to the invention, the aeration arm is designed such that the compressed air is directed from the distributor to the nozzle.

[0010] For aerating stagnant water, the compressed air distributor and the attached aeration arm can be positioned flexibly and easily within the water. The distributor is supplied with compressed air via a compressed air line connected to the compressed air source, which can be located on the bank of the water body. The compressed air is then quickly and reliably delivered to the aeration nozzle via the aeration arm. Furthermore, the support element allows the compressed air distributor to be easily secured in position within the water. The advantageous design of the device also enables low-maintenance operation, eliminating the need for failure-prone electronic components.

[0011] The device can be designed to aerate a body of standing water, such as a lake, pond, or pool. Hereinafter, a body of standing water is referred to as "water body." Furthermore, the device can be arranged in a state of use or in a state of transport. In the state of use, the device can be positioned on and / or in a body of water. In the state of transport, the device is disassembled into its individual parts for transport, for example, on one or more Euro pallets. Additionally, the device can be designed to clean the body of water.

[0012] The compressed air source provides compressed air for the compressed air line. The compressed air source can be, for example, an air compressor and / or a compressed air reservoir. Preferably, the compressed air source can be located on land, for example, on the bank of a body of water.

[0013] The compressed air line connects the compressed air source to the compressed air distributor. The compressed air line is designed to convey compressed air from the compressed air source to the compressed air distributor, which can be, and in particular must be, installed in the body of water. At each end, the compressed air line can be connected to a compressed air port on the compressed air source or a compressed air port on the compressed air distributor. For example, the compressed air line may be a hose to allow for flexible adaptation to the specific body of water. Alternatively, the compressed air line may be a pipe. In this case, the compressed air line can be permanently installed in the body of water and connected to the compressed air distributor for use with the device.

[0014] The compressed air distributor can be positioned in the body of water during operation, particularly at least partially below the water surface. The compressed air distributor is designed to transfer compressed air from the compressed air line to the aeration arm. The compressed air distributor can have a compressed air storage capacity.

[0015] The support element secures the compressed air distributor against rotation around its axis. For this purpose, the support element can, for example, be used to brace the compressed air distributor against a boundary of the body of water, such as its bottom and / or bank.

[0016] The ventilation arm is designed such that compressed air is directed from the compressed air distributor to the nozzle. The ventilation arm is an elongated component with a channel for conveying the compressed air from the compressed air distributor to the nozzle. The ventilation arm extends radially along its longitudinal axis to the axis of rotation. Preferably, the ventilation arm has a length greater than its width and height.

[0017] The compressed air distributor can be designed such that the ventilation arm is rotated around its axis of rotation by the compressed air released from the nozzles via the distributor. The ventilation arm can, for example, be rotatably mounted on the compressed air distributor.

[0018] The term "nozzle" refers to an opening in the aeration arm connected to the channel. The nozzle can be arranged on the aeration arm such that the compressed air exiting the nozzle drives the aeration arm circumferentially around its axis of rotation. Preferably, the nozzle can be arranged at an angle of between 30° and 60°, between 35° and 55°, or between 40° and 50° to a plane of rotation defined by the axis of rotation of the compressed air distributor and the longitudinal axis of the aeration arm. Preferably, the aeration arm can float on the water surface in its operating position. The arrangement of the nozzle allows the aeration arm, mounted on the compressed air distributor, to rotate around its axis of rotation, thereby reliably aerating a circular, and in particular large, area of ​​the water body defined by the movement of the nozzle around its axis of rotation with the compressed air exiting the nozzle.

[0019] The compressed air distributor, particularly in its operating position, comprises a lower housing connected to the compressed air line and an upper housing rotatably mounted on the lower housing about the axis of rotation, with the vent arm connected to the upper housing. The lower housing and the upper housing each define a cylindrical vessel with a wall extending along the axis of rotation between a base and a top surface. The wall has an inner wall and an outer wall. The lower housing and / or the upper housing may have a circular cross-section transversely, particularly perpendicularly to the axis of rotation. In its operating position, the housing may be open at the base or at the top surface. The wall of each housing may define an interior space. The upper housing may be mounted on the lower housing in such a way that the two interior spaces of the housings constitute the compressed air volume of the compressed air distributor.Preferably, the open base or top surfaces of the two pots should face each other.

[0020] The upper chamber can be positioned on the lower chamber in such a way that the compressed air volume of the air distributor is less than the sum of the volumes of the individual chambers. The vent arm can be positioned at an opening penetrating the wall of the upper chamber, for example, to connect the vent arm's channel to the interior of the upper chamber. The compressed air connection of the air distributor can be located on the lower chamber. Because the air distributor has a lower chamber and an upper chamber that together constitute the compressed air volume of the distributor, the vent arm can be easily and reliably mounted on the air distributor so that it can rotate freely.

[0021] According to one possible embodiment, the upper pot can be secured against axial movement along the axis of rotation to prevent it from detaching from the lower pot due to compressed air. To secure it against axial movement, the upper pot can be connected to the lower pot.

[0022] Preferably, the upper pot can be rotatably mounted on the lower pot by means of a bearing bolt extending along the axis of rotation between two end plates. The end plates are spaced apart from each other along the axis of rotation. Furthermore, the end plates can be supported against the base of the pot or against the inner wall of the pot. An end plate can be supported against the base or inner wall of the pot either directly or indirectly, for example, via another component. For instance, a first end plate can be supported against the inner wall of the lower pot, and a second end plate can be supported against the base of the upper pot. The second end plate can, for example, be designed as a nut.

[0023] The bearing bolt is a rod-shaped connecting element that joins the two end plates to axially secure the upper pot relative to the lower pot. The bearing bolt can be firmly connected to the end plates via a material-bonded connection, such as a weld, or alternatively or additionally via a force-fit and / or form-fit connection, such as an interference fit. Preferably, the bearing bolt can be connected to the upper pot in such a way that a rotational movement is transmitted from the upper pot to the bearing bolt or vice versa.

[0024] According to a possible further development, the bearing bolt can be rotatably mounted by two bearing elements arranged at a distance from each other between the end plates along the axis of rotation, and secured against axial movement along the axis of rotation by an intermediate plate rigidly connected to the lower pot. Each bearing element can comprise a bearing plate and one or more rolling elements, such as cylindrical rollers, arranged on the bearing plate.

[0025] The bearing plate can have a cross-section adapted to the cross-section of the upper or lower pot, particularly perpendicular to the axis of rotation. For example, the cross-section of the bearing plate can be circular and smaller than that of the upper or lower pot. Preferably, a first bearing plate can be arranged between the first end plate and the intermediate plate, and a second bearing plate can be arranged between the second end plate and the base of the upper pot. A cover element can be provided on the upper pot to protect the bearing plate. In this case, the second end plate can be indirectly supported on the base of the upper pot via the cover element. For example, the cover element can be a protective cap connected to the upper pot. Additionally, a locking washer can be arranged between the second end plate and the cover element.

[0026] The rolling elements can be arranged circumferentially, particularly in a star shape, around the axis of rotation and received in recesses of the bearing plate. The recesses can be designed such that each rolling element is rotatably mounted about its longitudinal axis. Furthermore, the rolling elements can be made of a plastic material, for example polyamide 6, to prevent rust formation on the rolling elements during operation of the device in water.

[0027] The intermediate plate is rotationally fixed to the lower pot, particularly to the inner wall of the lower pot. This can be achieved, for example, by a force-fit and / or form-fit connection, such as a screw connection. Alternatively or additionally, the intermediate plate can also be connected to the lower pot via a material-bonded connection, particularly a welded connection, or optionally, a suitable adhesive bond. The intermediate plate can be designed such that compressed air is transferred from the compressed air connection located on the base of the lower pot to the upper pot and / or the ventilation arm located on the upper pot. The intermediate plate and the upper pot, particularly the base of the upper pot, can each have a central through-hole for the bearing bolt. The through-hole can be dimensioned such that the bearing bolt can rotate within the respective through-hole with some play.

[0028] The intermediate plate can have at least one opening for the passage of compressed air. Preferably, the intermediate plate can have two or more openings. The openings of the intermediate plate can be arranged circumferentially around the axis of rotation and / or randomly spaced apart. Furthermore, the openings can be, for example, circular or semicircular, although other shapes are also conceivable. In addition, the openings of the intermediate plate can adjoin the circumference of a circular intermediate plate.

[0029] According to one possible embodiment, the upper and lower pots can be arranged coaxially to the axis of rotation, with the upper pot having a larger radius than the lower pot. The upper pot can be arranged in a mirror image of the lower pot with respect to a principal plane perpendicular to the axis of rotation. The end plate, intermediate plate, bearing elements, and / or cover element can be arranged coaxially to the axis of rotation. Preferably, the inner radius of the upper pot, i.e., the radius of its inner wall, can be larger than the outer radius, i.e., the radius of the outer wall, of the lower pot. This difference in radii can allow for a clearance fit between the upper and lower pots, thereby counteracting frictional losses when the upper pot rotates on the lower pot.

[0030] Optionally, the device can have at least one spacer element arranged between an outer wall of the lower pot and an inner wall of the upper pot. The spacer element can be attached to the lower pot or, alternatively, to the upper pot. Furthermore, the spacer element can have a sliding surface for guiding the inner wall of the upper pot or the outer wall of the lower pot. For example, the spacer element is formed as a brass ring. Two or more spacers can also be provided. Preferably, the spacers can be spaced apart from each other along the axis of rotation or circumferentially to the axis of rotation. The spacer element(s) can prevent blockages between the lower pot and the upper pot, for example, caused by rust and / or dirt deposits.

[0031] In a possible further development, the support element can be designed as a rope that can be attached to the bank of the body of water, and the compressed air distributor can have a guide for the rope, wherein the compressed air distributor is adjustable along the rope. The rope can be stretched between two opposite banks of the body of water. The guide is designed such that the rope is held in place at one or more points in the direction of travel. The guide can be formed from one or more guide elements. Furthermore, the guide element or elements can be arranged on the base, in particular on the bottom surface or the outer wall of the base of the compressed air distributor.

[0032] The compressed air distributor can have a protective element at the connection to the compressed air line to secure the line. The guide for the cable can preferably be arranged on the protective element. For example, the guide elements can be formed as through-openings in the protective element. Preferably, the through-openings can be arranged congruently on the protective element. Congruently means that the through-openings can be identical in shape and size and located on opposite sides of the protective element. Alternatively, the guide elements can also be formed as clip holders for securing the cable.

[0033] The protective element can be designed as a box-shaped housing enclosing the compressed air connection. The protective element can have an additional opening for the compressed air line. Because the support element is designed as a cable, the compressed air distributor can be flexibly adjusted along the cable within the body of water. Simultaneously, the distributor's base can be secured against unwanted rotation around its axis. The connection of the compressed air line to the distributor, particularly to the base, can be protected by both the base's anti-rotation device and the protective element.

[0034] According to a possible further development, the device can have at least two, at least three, or at least four aeration arms arranged circumferentially around the axis of rotation at a distance from each other on the compressed air distributor. The aeration arms can, for example, be arranged such that two adjacent aeration arms are each positioned at an angle of 15 to 180°, 30 to 150°, or 80 to 100°, for example, 90°, to each other. Multiple aeration arms allow the air to be introduced into the water more efficiently and quickly.

[0035] In one possible embodiment, the ventilation arm can have at least one ventilation arm element with a coupling section for connecting it to another ventilation arm element in order to adjust the length of the ventilation arm in the radial direction to the axis of rotation. The ventilation arm element can be formed as a tube with a polygonal, particularly rectangular, cross-section arranged transversely, especially perpendicularly, to the longitudinal axis of the ventilation arm. It is also conceivable that the cross-section of the ventilation arm element is circular. The ventilation arm element can be made of a metallic material, for example, aluminum. Preferably, the ventilation arm element can have a length between 1 and 3 meters, 1.5 and 2.5 meters, or 2 meters. For example, four ventilation arm elements with a length of 2 meters can be connected to each other via the coupling sections to form a ventilation arm with a length of 8 meters.This allows, for example, a circular area of ​​the body of water with a diameter of 16 meters to be covered by the device.

[0036] The coupling section allows the aeration arm element to be connected to another aeration arm element. Preferably, the coupling section is located at the end of the aeration arm element facing away from the compressed air distributor. For example, the coupling section can be designed as a threaded sleeve with set screws. A sealing element can be provided on the coupling section to seal the connection between two aeration arm elements. Alternatively or additionally, the coupling section can be designed, for example, as a bayonet fitting. Several aeration arm elements can be connected to each other at the coupling section to adjust the length of the aeration arm and thus increase the effective range of the device in the body of water. Because the length of the aeration arm can be adjusted as needed, the device can be flexibly adapted to different sized bodies of water in a particularly simple and reliable manner.

[0037] According to a possible embodiment, the ventilation arm can have several nozzles arranged radially to the axis of rotation, i.e., along the longitudinal axis of the ventilation arm, at intervals between them for releasing the compressed air. Preferably, at least one of the nozzles can be arranged at an end of the ventilation arm facing away from the compressed air distributor. If the ventilation arm is composed of two or more ventilation arm elements, one nozzle per ventilation arm element may suffice. However, several nozzles can also be arranged radially to the axis of rotation at intervals between the ventilation arm elements. Furthermore, the nozzles can be arranged at regular intervals or randomly distributed along the length of the ventilation arm, and in particular along the ventilation arm elements.The arrangement of multiple nozzles on the aeration arm allows for increased air and thus oxygen input, or the introduction of other gases or fluids into the water. The device can therefore be adapted even more flexibly to the specific body of water, as aeration arm elements with varying numbers of nozzles can be combined on a single arm.

[0038] In one possible embodiment, the nozzle can be designed or arranged on the ventilation arm such that it is height-adjustable along the axis of rotation relative to the operating position. The nozzle can be arranged on an adjusting element located on the ventilation arm, particularly the ventilation arm element. The adjusting element can be connected to the ventilation arm's channel to direct the compressed air from the channel to the nozzle. The ventilation arm, particularly the ventilation arm element, can have a through-wall opening for accommodating the adjusting element.

[0039] Height-adjustable means that the nozzle's position relative to the operating position, i.e., relative to the aeration arm and / or the water surface, can be adjusted along the axis of rotation. To adjust the nozzle's height, for example, the length of the adjustment element relative to the aeration arm and / or the angle of the nozzle to the plane of rotation can be changed. The adjustment element can consist of several telescopically adjustable sections. Alternatively, or permissiblely, the adjustment element can be a hose, allowing the nozzle's position to be selected using different hoses of varying lengths. Adjusting the nozzle's height allows air to be introduced at different depths in the pond, even though the aeration arm(s) float on the water's surface due to the compressed air flowing through the channel.

[0040] According to a possible further development, the aeration arm can have a collection element projecting from an outer wall of the aeration arm along its axis of rotation for collecting suspended solids, such as dirt or plants. In its operating position, the outer wall can float on the water's surface. The collection element can be detachably connected to the outer wall of the aeration arm. For detachable attachment of the collection element, the aeration arm can have one or more connecting elements distributed along its longitudinal axis. For example, the connecting element can be designed as a sliding strip or a hook.

[0041] The trapping element is a flat component used to capture dirt or plants, such as algae. "Flat" means that the trapping element has a thickness that is significantly less than its length and width. The trapping element can have a filter section with a variety of filter elements. These filter elements can be formed, for example, as projections extending from the surface of the filter section and / or as recesses in the surface of the filter section. The filter section can extend across the entire surface of the trapping element.

[0042] Several capture elements can be arranged on the aeration arm, particularly distributed along its entire length. For example, a capture element can be arranged on each aeration arm segment. With multiple aeration arms, each arm can have one capture element, with the capture elements arranged radially to the axis of rotation on different aeration arm segments to completely cover the circular area of ​​effect created by the rotation of the aeration arms. The capture element allows the device to be used for cleaning in addition to aerating the water. Because the capture element is detachably attached to the aeration arm, it can be quickly and easily removed and / or cleaned once the filter section becomes clogged with dirt or vegetation.

[0043] An embodiment of the invention is explained below with reference to the drawings. The drawings show, in schematic representation: Fig. 1 a side view of a device according to the invention for aerating standing waters, Fig. 2 a longitudinal section through a compressed air distributor of the device of Fig. 1, Fig. 3 a top view of an intermediate plate of the compressed air distributor of Fig. 2, Fig. 4 A top view of a bearing plate of the compressed air distributor of Fig. 2, Fig. 5 a top view of the compressed air distributor of Fig. 2 with four ventilation arms, Fig. 6 a cross-section through a ventilation arm along line AA from Fig. 5 and Fig. 7 a detailed view of a coupling section of a ventilation arm element of the ventilation arm of Fig. 5 and Fig. 6.

[0044] In Fig. Figure 1 is a device 1 for aerating, for example, stagnant waters. The device 1 has a compressed air source in the form of an air compressor 2 and a compressed air distributor 4 located in the water, which is connected to the air compressor 2 via a compressed air line 3. The device 1 also has a support element 5 for securing the compressed air distributor 4 against rotation about an axis of rotation D. Four aeration arms 6 are rotatably mounted on the compressed air distributor 4 about the axis of rotation D. Each aeration arm 6 has at least one nozzle 7 for releasing the compressed air supplied by the air compressor 2 into the water. The compressed air line 3 is connected at its end to both the air compressor 2 and the compressed air distributor 4 by a compressed air connection 8.

[0045] The compressed air distributor 4 is designed such that the ventilation arms 6 are rotated about the axis of rotation D by the compressed air released from the nozzles 7 via the ventilation arms 6 of the compressed air distributor 4. The compressed air distributor 4 has, with respect to the, as in Fig. 1 and Fig. Figure 2 shows a lower pot 9 connected to the compressed air line 3 and an upper pot 10 rotatably mounted on the lower pot 9 about the axis of rotation D. The lower pot 9 and the upper pot 10 each have a wall 16, 17 extending along the axis of rotation D between a base surface 11, 12 and a top surface 13, 14, with an inner wall 18, 19 and an outer wall 20, 21. In the operating position, the lower pot 9 and the upper pot 10 are each open at the top surface 13, 14. The wall 16, 17 of each pot 9, 10 defines an interior space 22, 23. The upper pot 10 is mounted on the lower pot 9 such that the two interior spaces 22, 23 of the pots 9, 10 form a compressed air volume 24 of the compressed air distributor 4. The open lid surfaces 13, 14 of the two pots 9, 10 face each other.

[0046] The upper pot 10 is rotatably mounted on the lower pot 9 by a bearing bolt 27 extending along the axis of rotation D between a first end plate 25 and a second end plate 26. The two end plates 25, 26 are spaced apart along the axis of rotation D. The first end plate 25 is supported against the inner wall 18 of the lower pot 9 by an intermediate plate 28. The second end plate 26 is supported against the base 12 of the upper pot 10 by a cover element in the form of a protective cap 29. For example, the second end plate 26 can be designed as a nut. Additionally, a locking washer 15 can be arranged between the protective cap 29 and the second end plate 26.

[0047] The bearing bolt 27 is rotatably mounted by two bearing elements 30 arranged at a distance from each other along the axis of rotation D between the end plates 25, 26 and secured against axial movement along the axis of rotation D by the intermediate plate 28, which is rigidly connected to the lower pot 9. The bearing elements 30 each have, as shown in Fig. Figure 4 shows an example of a bearing plate 31, 32 and several rolling elements 33 arranged on the bearing plate 31, 32. A first bearing plate 31 is arranged between the first end plate 25 and the intermediate plate 28. A second bearing plate 32 is arranged between the second end plate 26 and the base 12 of the upper pot 10.

[0048] The rolling elements 33 are distributed circumferentially around the axis of rotation D and are mounted in recesses 34 of the bearing plate 31, 32, each rotatable about its axis. Furthermore, the rolling elements 33 are formed as cylindrical rollers made of a plastic material, here, for example, polyamide 6.

[0049] The intermediate plate 28 and the base 11 of the upper pot 10 each have a central through-opening 35 with a clearance fit for the bearing bolt 27. The intermediate plate 28 is, for example, rotationally fixed to the inner wall 18 of the lower pot 9 via a screw connection 36. Alternatively or additionally, a welded connection can also be provided. As in Fig. As shown in Figure 3, the intermediate plate 28 has one or more openings 37, for example three, arranged circumferentially around the axis of rotation D. The openings 37 border a semicircular circumference 38 of the intermediate plate 28.

[0050] The upper pot 10 and the lower pot 9 are arranged coaxially with respect to the axis of rotation D. The upper pot 10 is arranged in a mirror image of the lower pot 9 with respect to a principal plane H arranged perpendicular to the axis of rotation D. The end plates 25, 26, the intermediate plate 28, the bearing elements 31, 32, and the protective cap 29 are also arranged coaxially with respect to the axis of rotation D. An inner radius R1 of the upper pot 10, i.e., the radius of the inner wall 19 of the upper pot 10, is larger than an outer radius R2, i.e., the radius of the outer wall 20 of the lower pot 9.

[0051] The support element is, for example, formed as a rope 5 that can be attached to the bank of the body of water. The compressed air distributor 4 has a guide 39 for the rope 5 and is adjustable along the rope 5. The guide 39 has two guide elements 41 arranged on a protective element 40 of the compressed air distributor 4. The protective element 40 is, for example, formed as a box-shaped housing enclosing the compressed air connection 8 of the compressed air distributor 4. The guide elements 41 are formed as through-openings in the protective element 40 and are arranged congruently with each other on opposite side surfaces 42 of the protective element 40. The protective element 40 has a further opening 43 for the passage of the compressed air line 2.

[0052] Fig. Figure 5 shows a top view of the four ventilation arms 6 arranged on the pressure distributor 4. Each ventilation arm 6 extends radially along its longitudinal axis L to the axis of rotation D and has a channel 45 formed by a wall 44 for conveying compressed air from the compressed air distributor 4 to the nozzle 7. The ventilation arms 6 are each arranged at an opening 46 penetrating the wall 17 of the upper pot 10, in order to connect the channel 45 of the ventilation arm 6 to the interior 23 of the upper pot 10. Two ventilation arms 6 adjacent to each other in the circumferential direction to the axis of rotation D are arranged at an angle α of 90° to each other.

[0053] The nozzle 7 is arranged on the ventilation arm 6 such that the compressed air exiting the nozzle 7 drives the ventilation arm 6 circumferentially around the axis of rotation. For this purpose, the nozzle 7 is arranged at an angle β between 30 and 60°, here for example 45°, to a plane of rotation DE defined by the axis of rotation D of the compressed air distributor 4 and the longitudinal axis L of the ventilation arm 6.

[0054] The ventilation arms 6 each have several, for example four, ventilation arm elements 47, which are connected to each other at a coupling section 48. The ventilation arm elements 47 are each formed as tubes made of a metallic material, for example aluminum, with a square cross-section 49 arranged perpendicular to the longitudinal axis L of the ventilation arm 6.

[0055] A ventilation arm element 47 has a length L1 between 1 and 3 m, here for example 2 m. The four ventilation arm elements 47, each with a length L1 of 2 m, are connected via the coupling sections 48 to form a ventilation arm 6 with a length L2 of 8 m.

[0056] The coupling section 48 is arranged at one end 50 of a ventilation arm element 47, the end facing away from the compressed air distributor 4. In this exemplary embodiment, the coupling section is formed, for example, as a threaded sleeve 48 with adjusting screws 51 (see Figure 1). Fig. 7) A sealing element 52, for example a sealing ring, is provided to seal the connection between two ventilation arm elements 47.

[0057] The ventilation arm 6 has several nozzles 7 arranged at intervals in the radial direction to the axis of rotation D, i.e., in the direction along the longitudinal axis L of the ventilation arm 6, for releasing the compressed air. Each ventilation arm element 47 has at least one nozzle 7. Optionally, further nozzles 7 can be arranged at intervals along the length L1 of a ventilation arm element 47.

[0058] The nozzles 7 are, as in Fig. As shown in Figure 7, the nozzles 7 are formed or arranged on the aeration arm 6 such that they are height-adjustable along the axis of rotation D relative to the operating position. The nozzle 7 is arranged on an adjusting element 53 located on the aeration arm element 47. The adjusting element 53 is connected to the channel 45 of the aeration arm 6 to direct compressed air from the channel 45 to the nozzle 7. Each aeration arm element 47 has a passage 54 penetrating the wall 44 of the aeration arm 6 for the arrangement of an adjusting element 53. "Height-adjustable" means that the position of the nozzle 7 relative to the operating position, i.e., relative to the aeration arm 6 and / or the water surface, is adjustable along the axis of rotation D.To adjust the height of the nozzle 7, the adjusting element 53 is, for example, formed in the form of a hose, whereby the height H of the nozzle 7 relative to the operating position can be adjusted by means of hoses of different lengths L3.

[0059] The ventilation arms 6 each have a trapping element 56 projecting from an outer wall 55 of the ventilation arm 6 in the direction of rotation D for trapping dirt or plants. For detachable attachment of the trapping element 56, the ventilation arm 6 has a connecting element 57 in the form of a slide-in rail extending in the direction of the longitudinal axis L. Optionally, several connecting elements 57 in the form of hooks, for example, can also be arranged at intervals along the longitudinal axis L.

[0060] The capture element 56 is designed here as a filter mat for trapping dirt or plants, for example algae, and has a filter section 58 with a multitude of filter elements not shown here. The filter section 58 extends over the entire surface of the capture element 56.

[0061] As in Fig. As shown in Figure 5, each ventilation arm 6 can have a capture element 56, wherein the capture elements 56 can each be arranged in a radial direction to the axis of rotation D on different ventilation arm elements 47 of the ventilation arms 6 in order to completely cover a circular area of ​​action 59 of the device 1 spanned by the rotation of the ventilation arms 6.

[0062] To aerate and clean the standing water, the compressed air compressor 2, located on the bank, is switched on. The compressed air is conveyed through the compressed air line 3 to the compressed air distributor 4. From the compressed air distributor 4, the compressed air is distributed to the aeration arms 6 and exits into the water through the nozzles 7. The compressed air exiting the nozzles 7 in a circumferential direction around the axis of rotation D rotates the aeration arms 6 and the upper pot 10 connected to them about the axis of rotation D. The upper pot 10 is secured against axial displacement induced by the compressed air by the bearing bolt 27, the end plates 25 and 26, and the intermediate plate 28. The support element in the form of the cable 5 secures the lower pot 9 against rotation about the axis of rotation D. Furthermore, the compressed air distributor 4 can be adjusted along the cable 5 within the water. Reference symbol list 1 Device for aerating standing waters 2. Compressed air source (air compressor) 3 Compressed air line 4 compressed air distributors 5 support element 6 ventilation arm 7 nozzle 8 Compressed air connection 9 saucer 10 Top pot 11 Base area of ​​the saucer 12 Base area of ​​the top pot 13 Cover surface of the saucer 14 Cover surface of the top pot 15 locking washer 16 Wall of the saucer 17 Wall of the upper pot 18 Inner wall of the saucer 19 Inner wall of the upper pot 20 Outer wall of the saucer 21 Outer wall of the upper pot 22 Interior of the saucer 23 Interior of the upper pot 24 compressed air volume 25 first end plate 26 second end plate 27 bearing bolts 28 Intermediate plate 29 Cover element (protective cap) 30 bearing element 31 first bearing plate 32 second bearing plate 33 rolling elements (cylindrical roller) 34 Exclusion 35 Passage opening 36 screw connection 37 Opening the intermediate plate 38 Perimeter of the intermediate plate 39 Leadership 40 protective elements 41 Guide element (passage opening) 42 Side surface of the protective element 43 Opening the protective element 44 Wall of the ventilation arm 45 Channel 46 Opening the top pot 47 Ventilation arm element 48 Coupling section (threaded sleeve) 49 Cross-section of the ventilation arm 50 End of the ventilation arm 51 adjusting screw 52 Sealing element 53 Adjustment element 54 Implementation 55 Outer wall of the ventilation arm 56 Capture element (filter mat) 57 Connecting element (insertion rail) 58 Filter section 59 Effect area of ​​the device D axis of rotation L Longitudinal axis of the ventilation arm L1 Length of the ventilation arm element L2 Length of the ventilation arm L3 Length of the adjusting element H Height of the nozzle HE Main Level DE Plane of rotation R1 Inner radius of the upper pot R2 Outer radius of the saucer α Angle between ventilation arms β Angle of the nozzle to the plane of rotation

Claims

[1] Device for aerating waters, comprising: - a compressed air source (2), - a compressed air distributor (4) connected to the compressed air source (2) via a compressed air line (3), - a support element (5) arranged on the compressed air distributor (4), wherein the support element (5) holds the compressed air distributor (4) in the water, and - at least one aeration arm (6) mounted on the compressed air distributor (4) and rotatable about the axis of rotation (D), with at least one nozzle (7) for releasing compressed air into the water, wherein the compressed air is directed from the compressed air distributor (4) to the nozzle (7) via the aeration arm (6). characterized by , that the compressed air distributor (4) has a lower pot (9) connected to the compressed air line (3) and an upper pot (10) rotatably mounted on the lower pot (9) about the axis of rotation (D), wherein the ventilation arm (6) is connected to the upper pot (10). [2] Device according to claim 1, characterized by , that the nozzle (7) is arranged on the ventilation arm (6) such that the compressed air exiting the nozzle (7) drives the ventilation arm (6) in a circumferential direction around the axis of rotation (D). [3] Device according to claim 1 or 2, characterized by , that the lower pot (9) is secured against rotation around the axis of rotation (D) by the support element (5). [4] Device according to any one of claims 1 to 3, characterized by , that the upper pot (10) is secured against axial adjustment in the direction along the axis of rotation (D). [5] Device according to any one of claims 1 to 4, characterized by , that the upper pot (10) is rotatably mounted on the lower pot (9) by a bearing bolt (27) extending in the direction along the axis of rotation (D) between two end plates (25, 26). [6] Device according to claim 5, characterized by, that the bearing bolt (27) is rotatably mounted by two bearing elements (30) arranged at a distance from each other in the direction along the axis of rotation (D) between the end plates (25, 26) and is secured against axial adjustment in the direction along the axis of rotation (D) by an intermediate plate (28) firmly connected to the lower pot (9). [7] Device according to any one of claims 1 to 6, characterized by , that the upper pot (10) and the lower pot (9) are arranged coaxially to the axis of rotation (D), wherein the upper pot (10) has a larger radius (R1) than the lower pot (9). [8] Device according to any one of claims 1 to 7, characterized by at least one spacer element arranged between an outer wall (20) of the lower pot (9) and an inner wall (18) of the upper pot (10). [9] Device according to any one of claims 1 to 8, characterized by, that the support element is formed as a rope (5) that can be attached to the bank of the body of water and the compressed air distributor (4) has a guide (39) for the rope (5), wherein the compressed air distributor (4) is adjustable along the rope (5). [10] Device according to any one of claims 1 to 9, characterized by , that the compressed air distributor (4) has a protective element (40) at the connection with the compressed air line (3) to secure the compressed air line (3). [11] Device according to any one of claims 1 to 10, characterized by at least two, preferably three, particularly preferably four ventilation arms (6) arranged circumferentially around the axis of rotation (D) at a distance from each other on the compressed air distributor (4). [12] Device according to any one of claims 1 to 11, characterized by, that the ventilation arm (6) has at least one ventilation arm element (47) with a coupling section (48) for connecting to another ventilation arm element (47) in order to adjust a length (L2) of the ventilation arm (6) in the radial direction to the axis of rotation (D). [13] Device according to claim 12, characterized by , that the ventilation arm element (47) has a length (L1) between 1 and 3 meters. [14] Device according to any one of claims 1 to 13, characterized by , that the ventilation arm (6) has several nozzles (7) arranged at a distance from each other in a radial direction to the axis of rotation (D) for releasing the compressed air. [15] Device according to any one of claims 1 to 14, characterized by , that the nozzle (7) is formed or arranged on the ventilation arm (6) such that the nozzle (7) is height-adjustable in the direction along the axis of rotation (D) with respect to the operating position. [16] Device according to any one of claims 1 to 15, characterized by , that the ventilation arm (6) has a capture element (56) projecting in the direction along the axis of rotation (D) from an outer wall (55) of the ventilation arm (6) for collecting suspended particles.

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