Submersible motor agitator, servicing method, and use

Abstract

The invention relates to a submersible motor agitator (1) for use in a vessel (101) of a biogas plant (100), of a sewage treatment plant (200) and / or of an industrial plant (300), the submersible motor agitator comprising an electric motor device (2) with a housing device (3), comprising an agitator device (4) with an agitator blade (5), and comprising an electrical supply line (6), wherein: the housing device (3) provides a fluid-tight receiving space (7) in which a rotor (8) and a stator (9) are arranged; the rotor (8) is led fluid-tightly to the outside; and the agitator device (4) is operatively connected to the externally situated part of the rotor (8). A pin part (51) of a plug connection (50) is arranged on an outer wall (10) of the housing device (3), wherein a line (11) from the receiving space (7) is connected to a connector (53) in the pin part (51). The supply line (6) is led fluid-tightly into a socket part (52) of the plug connection (50), wherein a conductor (12) of the supply line (6) is connected to a connector (54) of the socket part (52). The socket part (52) and the pin part (51) are fluid-tightly sealed when in the connected state. In the method for servicing such a submersible motor agitator (1), in the event of a defect in the supply line (6), a new supply line (6) is fitted with a corresponding socket part (53) and is connected to the pin part (51). The invention also relates to the use of a plug connection on such a submersible motor agitator (1).

Description

[0001]Anaergia Technologies GmbH Submersible Motor Mixer, Maintenance Method and Use Description The present invention relates to a submersible motor mixer, particularly for use in a tank of a biogas plant, a wastewater treatment plant, and / or an industrial plant. Such a submersible motor mixer comprises at least one electric motor unit with at least one housing unit, at least one mixing unit with at least one impeller, and at least one electrical supply line. The housing unit provides at least one fluid-tight receiving chamber in which at least one rotor and at least one stator are arranged, wherein the rotor is fluid-tight to the outside and wherein the mixing unit is mounted on the outer part of the rotor. The present invention also relates to a method for maintaining or installing such a submersible motor mixer and to its use.Submersible motor mixers are known in many designs in the prior art. Such mixers are used, among other things, in the tanks of biogas plants, wastewater treatment plants, and / or industrial plants to mix the contents of the tank. The operating environment of such mixers is generally very demanding on the material, and therefore regular maintenance or even replacement of the mixer may be necessary. Anaergia Technologies GmbH offers such mixers, which can be operated hydraulically or with an electric motor. If an electric motor drives the mixing device or the impeller, an electrical supply line must be routed into the submersible mixer and sealed fluid-tight. This is usually done by routing a cable through the mixer housing to the motor inside and connecting it there. The opening is then sealed or potted fluid-tight.This type of electrical connection is generally reliable. However, a disadvantage is that connecting the motor to the power supply is relatively difficult, and replacing the power supply after it has been potted is very difficult or requires considerable effort. A particular problem is that replacement or maintenance may generally only be carried out by trained personnel, and the agitator usually has to be removed from the container when the power supply needs to be replaced. Therefore, the object of the present invention is to provide a submersible motor agitator with an electric motor that is easier to connect and maintain. This object is achieved by a submersible motor agitator with the features of claim 1, by a method with the features of claim 14, and by a use with the features of claim 16.Preferred embodiments of the invention are the subject of the dependent claims. Further advantages and features of the present invention will become apparent from the general description and the description of the exemplary embodiment. The submersible motor agitator according to the invention is particularly suitable for use in a tank of a biogas plant, a wastewater treatment plant (Anaergia Technologies GmbH), and / or an industrial plant, and comprises at least one electric motor unit with at least one housing unit, at least one agitator unit with at least one impeller, and at least one electrical supply line. The housing unit provides at least one fluid-tight receiving chamber in which at least one rotor and at least one stator are arranged, wherein the rotor is fluid-tight to the outside and wherein the agitator unit is in operative communication with the outer part of the rotor.At least one pin part of a plug connector is arranged on at least one outer wall of the housing assembly, wherein at least one conductor from the receiving space is connected to at least one terminal in the pin part. Furthermore, the supply line is fed fluid-tight into at least one socket part of the plug connector, wherein at least one conductor of the supply line is connected to at least one terminal of the socket part. In the connected state, the socket part and the pin part are fluid-tightly sealed. The submersible motor agitator is particularly suitable for use in a fermenter of a biogas plant, whereby the submersible motor agitator can be used to achieve thorough mixing of the fermenter contents. The agitator is in operative contact with the rotor, either directly or indirectly. Direct contact with the rotor can be provided. Depending on the design, however, a gearbox can preferably be interposed, for example.Depending on the design, the arrangement of the pin and socket parts can preferably be reversed, so that the socket part can also be located on the outer wall of the housing. In this case, the pin part is preferably located on the supply line, but care should be taken to ensure that no unintentional contact can occur between the pins of the Anaergia Technologies GmbH connector. This can be achieved, for example, by a safety cap, which is removed before the socket part is attached to the pin part. The pin part is located on at least one outer wall of the housing, whereby this means in particular that the pin part is attached to the outer wall, embedded in and / or integrated into the outer wall, or otherwise in operative contact with the outer wall.A fluid-tight seal can be achieved, in particular, by providing appropriate seals and / or by using suitable sealants. Specifically, a fluid-tight pouring and / or injection with a suitable sealant can be used. The fluid-tight receiving space of the housing assembly of the submersible motor agitator is, in particular, a suitably sealed space in which the components of the electrical motor assembly are arranged. The supply line includes, in particular, at least one power supply for the submersible motor agitator. However, other lines may also be provided, preferably sensor lines and, depending on the design, data lines.The pin part and the socket part preferably each comprise at least one housing structure with at least one connection, wherein a fluid-tight seal can preferably be achieved when the two housing structures are plugged together by means of a corresponding shape and / or appropriately inserted seals. The pin part preferably comprises at least one pin part housing and the socket part preferably comprises at least one socket part housing. The submersible motor agitator according to the invention offers many advantages. A significant advantage is that the use of a plug connection considerably simplifies the assembly and / or maintenance of the submersible motor agitator.This makes it possible, in particular, to connect the power cable only after the submersible motor agitator has been installed inside the tank, and / or to disconnect the electrical connection of the submersible motor agitator during maintenance by releasing the plug connection, and / or to repair and / or replace individual components of the submersible motor agitator and / or the plug connection. Replacing the cable in case of damage and / or maintenance work is also significantly easier. In particular, the use of a suitably designed plug connection can also prevent, for example, the risk of incorrect connection and thus damage to the agitator. Preferably, the pin and socket parts are mechanically fixed in the installed state or in the connected state. A screw connection can be advantageously used to achieve this mechanical fixation. Fixation can also be achieved, in particular, by a suitable connection or...Fixation occurs between the pin housing and the bushing housing. Preferably, at least one seal is arranged between the pin and bushing. For example, a seal such as an O-ring or the like can achieve a seal between the pin and bushing, or between the housing structures of the pin and bushing. Anaergia Technologies GmbH. Preferably, the pin is integrated into the outer wall of the housing assembly. The outer wall can, in particular, provide the pin housing. The pin can, in particular, be recessed, machined, and / or otherwise integrated into the housing assembly in the outer wall. Depending on the design, appropriate seals can preferably be provided to ensure a reliable seal. Preferably, the outer wall has at least one housing-like recess for receiving the pin.A particularly suitable integration of the pin component into the outer wall can thus be achieved. For example, a shape can preferably be provided such that the pin component is inserted into the shape from what will later be the inner side of the outer wall during installation of the submersible motor agitator. Particularly preferably, at least one conductor compartment is formed in the housing behind the pin component, which is preferably protected from rotating components by a conductor guard plate. A conductor compartment is, in particular, a free space for cables or a cable compartment, so that it preferably accommodates a reservoir for cables or excess cable and is protected, in particular, from rotating components, for example, the rotor of the electric motor. In advantageous embodiments, at least one reservoir for at least one conductor is provided in the conductor compartment.In the event of a connection failure, the cable can be disconnected from the pin, pulled out further, and reconnected to a plug or the pin. Preferably, sufficient reservoir or cable is provided in the conductor compartment to allow for multiple repairs. Anaergia Technologies GmbH. Preferably, the pin and socket parts comprise matching plug-in modules with multiple connections. This allows, in particular, the use of pre-assembled plug-in modules for pinning or other types of connectors, which can be manufactured or ordered according to the application and requirements. Preferably, the supply line includes at least a power supply and / or at least one sensor line. This makes it possible, in particular, to supply power to the submersible motor agitator via the supply line and, depending on the design, to connect sensors provided on and / or in the submersible motor agitator.Furthermore, for example, a network cable, cables for sensors, and / or cables for leak testing, and / or the like, may be provided. In particular, sensors for temperature monitoring may be provided. In advantageous embodiments, at least one second supply line is provided, with both supply lines being connected by means of a plug connector. In particular, it may be provided that one supply line provides the power supply and all other lines are inserted into the plug connector via a separate supply line. Preferably, the connections in the pin part and the socket part are designed and / or arranged in such a way as to provide an anti-rotation feature.In particular, the number, shape, position, and / or special additional features in the housing structures of the pin and socket parts can be designed so that the pin and socket parts can only be connected in a predetermined orientation. Anaergia Technologies GmbH. Preferably, at least the plug connection has ATEX approval. This preferably ensures that the entire submersible motor agitator receives ATEX approval, even if the power supply is connected via a plug connection. In particular, the ATEX approval is designed such that at least the pin and socket parts together have ATEX approval, especially in conjunction with the corresponding housings. This makes it possible, in particular, to ensure that work on the agitator that also involves the plug connection, e.g.,The connection and / or disconnection of the agitator can be carried out by a (regular) qualified electrician, thus eliminating the need for a specialist trained by the manufacturer (for ATEX approval). Preferably, the supply cable entry into the socket is potted in a fluid-tight manner. This allows for a particularly reliable and durable fluid-tight design. Preferably, not the entire socket is potted, but only the area where the supply cable enters. This allows the supply cable to be potted, at least partially, for example, in the area of ​​a so-called cable gland. The method according to the invention is used for servicing a submersible motor agitator as described above. In the event of a defect in the supply cable, a new supply cable is fitted with a corresponding socket and connected to the pin on the submersible motor agitator.The method according to the invention also offers the advantages previously described for the submersible motor agitator according to the invention. Preferably, during maintenance, the existing socket part and / or pin part is repaired by replacing at least one Anaergia Technologies GmbH plug-in module. This makes it possible to repair the plug connection, and thus the submersible motor agitator, in a particularly cost-effective and resource-efficient manner. A method for commissioning such a submersible motor agitator is also according to the invention, wherein the supply line with the socket part of the plug connection is inserted onto the pin part and thus connected. Preferably, a fluid-tight connection is achieved by inserting and / or subsequently fixing the connection, in particular by means of appropriate seals.According to the invention, the use of at least one plug connection for connecting at least one electrical supply line to at least one submersible motor agitator is also supported, particularly for use in a tank of a biogas plant, a wastewater treatment plant, and / or an industrial plant. In this case, at least one pin part of the plug connection is arranged on at least one outer wall of a housing assembly of a submersible motor agitator, and the supply line is fluid-tightly connected to at least one socket part of the plug connection. The socket part and the pin part are fluid-tightly sealed when connected. This application also offers the advantages described in relation to the submersible motor agitator and the method according to the invention. Further advantages and features of the present invention will become apparent from the exemplary embodiment, which is explained below with reference to the accompanying figures. The figures show: Fig.Fig. 1 A purely schematic representation of an embodiment of a submersible motor mixer according to the invention in a container; Anaergia Technologies GmbH Fig. 2 A purely schematic representation of an embodiment of a drive unit of a submersible motor mixer according to the invention with supply line in a perspective view; Fig. 3 A purely schematic representation of an embodiment of a drive unit of a submersible motor mixer according to the invention in a perspective view with a detail enlargement; Fig. 4 A purely schematic representation of an embodiment of a drive unit of a submersible motor mixer according to the invention in a top view and a sectional view; Fig. 5 A purely schematic representation of an embodiment of a drive unit of a submersible motor mixer according to the invention in a side view and a sectional view; Fig.Figure 6 shows a purely schematic representation of an embodiment of a drive unit of a submersible motor mixer according to the invention in a perspective view with a detail magnification; Figure 7 shows a purely schematic representation of an embodiment of a socket part of a plug connection for a submersible motor mixer according to the invention in a perspective view; Figure 8 shows a purely schematic representation of an embodiment of a socket part of a plug connection for a submersible motor mixer according to the invention in a frontal view; and Figure 9 shows a purely schematic representation of an embodiment of a plug connection for a submersible motor mixer according to the invention in a sectional view. Figure 1 shows a purely schematic representation of a submersible motor mixer 1 according to the invention in a container 101 of a biogas plant 100, wherein the container 101 is a fermenter 102 in the embodiment shown.Depending on the design, the submersible motor mixer 1 according to the invention can also be provided or used, for example, in the tank 101 of a wastewater treatment plant 200 or in an industrial plant 300. In the illustrated embodiment, the submersible motor mixer 1 comprises a housing 3 within which an electric motor unit 2 is housed. The motor unit 2 comprises a rotor 8 and a stator 9, the rotor 8 being guided fluid-tight through the housing 3 to the outside. The end of the rotor 8 is operatively connected via a gear unit 19 to a mixing unit 4 with several impellers 5. Figure 2 shows a purely schematic perspective view of an embodiment of a drive unit 20 of a submersible motor mixer 1 according to the invention.Here too, it is known that the submersible motor mixer 1 comprises a motor unit 2, which is housed within a fluid-tight enclosure 3. A stator 9 is provided within the enclosure 3, by means of which a rotor 8, which extends outwards, is rotated. The mixing device 4 shown in Figure 1 is then attached to the end of the rotor 8 extending from the enclosure 3. Anaergia Technologies GmbH. The submersible motor mixer 1 further comprises a supply line 6, which, according to the invention, is connected to the submersible motor mixer 1 or the electric motor unit 2 via a plug connector 50. Because the supply line 6 is connected to the submersible motor mixer 1 via a plug connector 50, installation and / or maintenance can be particularly simple, as the supply line 6 can be connected and disconnected relatively easily.In conventional submersible motor mixers, a supply line 6 is typically guided through a corresponding opening in the housing assembly 3 into the interior of the housing assembly 3, where the supply line 6 is then potted or otherwise suitably sealed. This makes installation and maintenance considerably more difficult compared to the use of a plug connection 50. Figure 3 schematically illustrates an embodiment of a drive unit 20 of a submersible motor mixer 1 according to the invention in a perspective view and an enlarged detail view. It is shown that the plug connection 50 for connecting the supply line 6 to the submersible motor mixer 1 or the motor assembly 2 comprises a socket part 52 and a pin part 51. The pin part 51 includes a pin part housing 61, and the socket part 52 includes a socket part housing 62.In the installed state of the connector 50, the pin part 51 is fluid-tightly connected to the socket part 52, and the connector 50 has ATEX approval in the illustrated embodiment. For this purpose, corresponding seals 55 are provided between the pin part 51 and the socket part 52, ensuring a secure connection between the pin part 51 and the socket part 52 via a mechanical fixing, in this case by screws 57. The pin part 51 of the connector 50 is integrated into an outer wall 10 of the housing 3, with the pin part housing 60 being formed by the outer wall 10 in the illustrated embodiment. For this purpose, a recess 13 is provided on the rear of the housing 3, or on the rear wall 17, in the area of ​​the cable entry. This recess is adapted to the contour or shape of the pin part 51 and forms the pin part housing 60.This allows for a particularly good and, depending on the design, fluid-tight integration of the pin part 51 into the rear wall 17, using appropriate seals. Figure 4 shows an embodiment of a drive unit 20 of a submersible motor agitator 1 according to the invention in a top view and in a sectional view along the section plane AA. Here, too, the connection between the pin part 51 and the socket part 52 of the plug connector 50 is known, in order to connect the supply line 6 to the motor unit 2 or to a line 11 inside the housing unit 3. It is further shown that a conductor compartment 14 is provided behind the pin part 51 in the housing 3, which is protected from rotating components by a protective shield 15. A reservoir 16 for at least one line 11 can be provided here, so that in the event of a defect in the pin part 51, the line can be disconnected, pulled out further, and reconnected.Anaergia Technologies GmbH. Figure 5 shows a purely schematic side view of an embodiment of a drive unit 20 of a submersible motor agitator 1 according to the invention, with a sectional view along the section plane BB also shown. Here, too, the connection between the pin part 51 and the socket part 52 of the connector 50, or between the pin part housing 60 and the socket part housing 61, is known. Figure 6 shows a purely schematic perspective view of the rear wall 17 or the outer wall 10 of the housing assembly 3, with a detailed enlargement of the pin part 51 shown alongside. Here, too, it is known that the pin 51 is received in a corresponding recess 13 in the rear wall 17 of the housing assembly 3. The illustrated embodiment of the pin part 51 comprises several terminals 53 into which different cables 11 with different properties can be inserted or plugged in.It is specifically provided here that a power supply is plugged into or pinned into corresponding terminals 53. In addition, various other lines 11 can be provided, for example, to transmit sensor data or to perform a leak test. Figures 7 and 8 show an embodiment of a socket part 52 of a plug connection 50 for a submersible motor agitator 1 according to the invention in a perspective view and a frontal view of the terminals 54. Here, too, it is known that the terminals 54 can have different dimensions. Furthermore, different shaped bodies 58 with different contours are provided. The shape and arrangement of the individual terminals 53, 54, and additionally the arrangement and shape of the shaped bodies 58, provide a reliable anti-rotation device 59.The connector 50 can only be connected in the intended orientation. Depending on the design, the anti-rotation feature 59 can also be provided solely by the shape and / or orientation of the terminals 53, 54. In the illustrated embodiment, the socket part 52 is assembled from a plurality of pre-assembled plug-in modules 56, which are housed in the socket part housing 61. The pin part 51 is constructed accordingly, so that different codings or terminals 53, 54 can be provided depending on the application. In particular, it is possible for different conductors 12 of the supply line 6 to be pinned into or connected to corresponding terminals 54. Figure 9 schematically depicts a connector 50 with a pin part 51 and a socket part 52 in a connected state.The drawing shows, among other things, that the supply line 6 is provided with appropriate seals leading into the socket part 52. A seal 55 is provided between a so-called cable gland 62 and the rest of the socket part housing 61. Additionally, the access point or feed-in 18 of the supply line 6 into the socket part 52 is fluid-tight in the area of ​​the cable gland 62 and an optional cable spreader plate 63, thus achieving particularly reliable sealing and, in this case, ATEX approval.Anaergia Technologies GmbH Reference List 1 Submersible Motor Mixer 58 Molded Body 2 Motor Unit 59 Anti-Rotation Device 3 Housing Unit 60 Pin Housing 4 Mixer Unit 61 Socket Housing 5 Agitator Blade 62 Cable Gasket 6 Supply Cable 63 Cable Spreader Plate 7 Receptacle 64 Potting Compound 8 Rotor 100 Biogas Plant 9 Stator 101 Tank 10 102 Fermenter Outer Wall 200 Wastewater Treatment Plant 11 Pipe 300 Industrial Plant 12 Conductor 13 Molding 14 Conductor Compartment 15 Conductor Protection Plate 16 Reservoir 17 Back Panel 18 Feed 19 Gear Unit 20 Drive Unit 50 Plug Connection 51 Pin 52 Socket 53 Connection 54 Connection 55 Seal 56 Plug Module 57 Screw

Claims

Anaergia Technologies GmbH Claims:

1. Submersible motor mixer (1) particularly for use in a tank (101) of a biogas plant (100), a wastewater treatment plant (200) and / or an industrial plant (300), comprising at least one electric motor unit (2) with at least one housing unit (3), at least one mixing unit (4) with at least one impeller (5) and at least one electrical supply line (6), wherein the housing unit (3) provides at least one fluid-tight receiving chamber (7) in which at least one rotor (8) and at least one stator (9) are arranged, wherein the rotor (8) is fluid-tight to the outside and wherein the mixing unit (4) is in operative communication with the outer part of the rotor (8), characterized in that at least one pin part (51) of a plug connection (50) is arranged on at least one outer wall (10) of the housing unit (3),wherein at least one line (11) from the receiving chamber (7) is connected to at least one terminal (53) in the pin part (51), and wherein the supply line (6) is fluid-tightly fed into at least one socket part (52) of the plug connection (50), wherein at least one conductor (12) of the supply line (6) is connected to at least one terminal (54) of the socket part (52), and wherein the socket part (52) and the pin part (51) are fluid-tightly sealed in the connected state.

2. Submersible motor agitator (1) according to claim 1, wherein the pin part (51) and the socket part (52) are mechanically fixed.

3. Submersible motor agitator (1) according to any one of the preceding claims, wherein at least one seal (55) is arranged between the pin part (51) and the socket part (52). Anaergia Technologies GmbH 4. Submersible motor mixer (1) according to any one of the preceding claims, wherein the pin part (51) is integrated into the outer wall (10) of the housing assembly (3).

5. Submersible motor mixer (1) according to the preceding claim, wherein the outer wall (10) has at least one housing-like projection (13) for receiving the pin part (51).

6. Submersible motor mixer (1) according to any one of the preceding claims, wherein at least one conductor compartment (14) is formed in the housing assembly (3) behind the pin part (51), which is preferably protected from rotating components by a conductor protection plate (15).

7. Submersible motor mixer (1) according to the preceding claim, wherein a reservoir (16) of the at least one line (11) is provided in the conductor compartment (14).

8. Submersible motor mixer (1) according to one of the preceding claims, wherein the pin part (51) and the socket part (52) comprise matched plug-in modules (56) with multiple connections (53, 54). 9.

10. Submersible motor mixer (1) according to any one of the preceding claims, wherein the supply line (6) includes at least one power supply and / or at least one sensor line.

11. Submersible motor mixer (1) according to any one of the preceding claims, wherein at least one second supply line (6) is provided.

12. Submersible motor mixer (1) according to any one of the preceding claims, wherein the connections (53, 54) are designed and / or arranged such that an anti-rotation device (59) is provided. Anaergia Technologies GmbH 12. Submersible motor mixer (1) according to one of the preceding claims, wherein at least the plug connection (50) has ATEX approval.

13. Submersible motor mixer (1) according to the preceding claim, wherein the feed (18) of the supply line (6) is fluid-tightly potted into the socket part (52).

14. Method for maintaining a submersible motor mixer (1) according to one of the preceding claims, characterized in that, in the event of a defect in the supply line (6), a new supply line (6) is fitted with a corresponding socket part (53) and connected to the pin part (51).

15. Method according to the preceding claim, wherein the existing socket part (51) and / or pin part (51) is repaired by replacing at least one plug module (56). 16.Use of at least one plug connection (50) for connecting at least one electrical supply line (6) to at least one submersible motor mixer (1), in particular for use in a tank of a biogas plant (100), a sewage treatment plant (200) and / or an industrial plant (300), characterized in that at least one pin part (51) of the plug connection (50) is arranged on at least one outer wall (10) of a housing device (3) of a submersible motor mixer (1) and that the supply line (6) is fluid-tightly connected to at least one socket part (52) of the plug connection (50), wherein the socket part (52) and the pin part (51) are fluid-tightly sealed in the connected state.

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