Nozzle device

Abstract

The invention relates to a nozzle arrangement (1) comprising a line arrangement (2) comprising an outer line (3) conducting a gaseous medium and an inner line (9) arranged inside the outer line (3) and conducting a medium to be injected, and a nozzle base body (8) connected to the line arrangement (2) at an outlet side (6) and comprising at least one nozzle (7), wherein coupling elements (39) are respectively arranged on an outlet-side inner line end section (38) of the inner line (9) and on the nozzle base body (8), one coupling element (39) being provided as a first coupling element (39a) and one coupling element (39) being provided as a second coupling element (39b), the coupling elements (39, 39a, 39b) being coupleable to each other by means of a plug-in connection, according to the invention, the first coupling element (39a) is provided as a coupling head (41) through which a coupling head channel system (40) passes, and the second coupling element (39b) is provided as a receiving sleeve (43) comprising a receiving space (42), such that, in the assembled state of the nozzle device (1), the inner line (9) is connected to the nozzle base body (8), and the medium to be injected can flow from the inner line (9) to the direction of the at least one nozzle (7).

Description

Technical Field

[0001] The invention relates to a nozzle device, which comprises a pipeline device, which comprises an outer pipeline for guiding a gaseous medium and an inner pipeline arranged in the outer pipeline and guiding a medium to be sprayed, and comprises a nozzle base body connected to the pipeline device on the outlet side and comprising at least one nozzle, wherein coupling elements are respectively arranged on a pipeline end section in the outlet side of the inner pipeline and on the nozzle base body, wherein one coupling element is configured as a first coupling element and one coupling element is configured as a second coupling element, so that the coupling elements can be connected to each other by a plug connection. Background Art

[0002] Nozzle arrangements are known from the prior art:

[0003] EP 1 871 534 B1 discloses a nozzle for a fluidized bed device, the nozzle having a central liquid outlet for a liquid coating agent and an annular air outlet for coaxially supplying atomizing air, wherein the annular air outlet is delimited by an enclosure which can be held in a housing wall of the fluidized bed device, in particular in a base, the enclosure having a central hole and being connected to an atomizing air source via an air pipe, an axially displaceable nozzle head being mounted in the center of the enclosure, the central liquid outlet being formed in the nozzle head, wherein the nozzle head abuts against an axial stop in the central hole, the nozzle head being connected to a liquid coating agent source via a liquid pipe, wherein the liquid pipe has a flexible pipe section in a bending area and is guided into the center of the air pipe, and the liquid pipe is axially movably mounted in a seal in the air pipe.

[0004] DE 10 2016 122 133 A1 discloses a pipeline arrangement for a nozzle arrangement, wherein the nozzle arrangement has both a flexible inner pipeline and a flexible outer pipeline. The nozzle arrangement is also equipped with a nozzle head and a connecting piece, which are designed to be inserted into a nozzle head holder and a connecting piece of a processing module, between which a sleeve of the processing module receiving the pipeline arrangement extends. This allows the entire pipeline arrangement to be positioned very precisely in the application position, in particular without any adjustment work on the nozzle head.

[0005] A disadvantage of the nozzle devices shown in the prior art is that the coupling of the inner line to the nozzle base body is designed as a hose connection sleeve combination, which allows connection or disconnection only after disassembly of the nozzle device. Summary of the invention

[0006] It is therefore an object of the present invention to provide a nozzle arrangement which overcomes the disadvantages of the prior art.

[0007] The object is achieved by a nozzle device of the type mentioned at the outset, wherein the first coupling element is designed as a coupling head through which the coupling head channel system passes, and the second coupling element is designed as a receiving sleeve with a receiving space, so that in the assembled state of the nozzle device, the inner line is connected to the nozzle base body and the medium to be sprayed can flow from the inner line in the direction of the at least one nozzle. By designing the first and second coupling elements in this way, coupling or disconnection can also be achieved in the assembled state of the nozzle device.

[0008] In a further development of the nozzle device, it is advantageous if the first coupling element is arranged at the end section of the inner line and the second coupling element is arranged at the nozzle base body. Assigning the first coupling element to the inner line end section and the second coupling element to the nozzle base body can make the construction of the nozzle device simpler and therefore more cost-effective.

[0009] Furthermore, the receiving space is defined by the receiving sleeve wall and the receiving sleeve base.

[0010] According to an advantageous embodiment of the nozzle arrangement, the coupling head channel system comprises an input channel having a longitudinal axis, which in a transition region merges with a plurality of output channels which open out on a side surface of the coupling head. In particular, the plurality of output channels are arranged at an angle to the longitudinal axis of the input channel and / or the output channels are evenly distributed in the circumferential direction of the coupling head. By means of such an arrangement of the output channels, the nozzle arranged in the nozzle base can advantageously be supplied with the medium to be sprayed.

[0011] Preferably, each output channel has an output channel cross-sectional area that is many times smaller than the input channel cross-sectional area. The output channels thus have a screening function, since, due to their output channel cross-sectional area that is many times smaller than the input channel cross-sectional area, they retain coarse impurities carried in the medium to be sprayed, which can clog the nozzle arranged in the nozzle base. If the output channel of the coupling head channel system is clogged with larger impurities, the inner pipeline including the coupling head can be easily removed and replaced, even during the process, without having to dismantle the nozzle arrangement. Particularly preferably, each output channel has an output channel cross-sectional area that is smaller than the nozzle outlet cross-sectional area. This also ensures that impurities that are not retained by the output channel can also pass through the nozzle outlet unimpeded and do not clog the nozzle, or only clog the nozzle in the worst case.

[0012] According to another advantageous embodiment of the nozzle device, the coupling head comprises a coupling head fastening device for the inner pipeline, wherein the coupling head fastening device is advantageously configured as a coupling head fastening sleeve with an internal thread or a first locking element. Preferably, the coupling head fastening device is penetrated by the coupling head channel system. Using such a coupling head fastening device, the inner pipeline can be conveniently and permanently connected to the coupling head and can be passed through by the medium to be sprayed.

[0013] In a further advantageously improved nozzle device, the coupling head comprises a cover element placed on the coupling head fastening sleeve, wherein the cover element advantageously passes through the coupling head fastening device at the rear side through the coupling head connecting sleeve. The cover element placed on the coupling head fastening sleeve enables the first coupling element arranged as the coupling head to be optimally adapted to the second coupling element designed to receive the sleeve. In addition, the coupling head connecting sleeve further improves and permanently fixes the connection of the inner pipeline to the coupling head. Preferably, the coupling head connecting sleeve is coaxially surrounded by the coupling head fastening device, advantageously coaxially surrounded by the coupling head fastening sleeve, and further preferably, the input channel is coaxially surrounded by the coupling head connecting sleeve. In addition, a space is included between the coupling head connecting sleeve and the coupling head fastening sleeve, into which an inner pipeline having an external thread or a second locking element on its end section can be introduced, so that the internal thread or the first locking element of the coupling head fastening sleeve and the external thread or the second locking element of the inner pipeline are operatively connected to each other. This ensures simple and permanent fastening of the inner line to the first coupling element designed as a coupling head.

[0014] According to another advantageous development of the nozzle device, the first coupling element, which is arranged as a coupling head, has a coupling head sealing element which seals between the first and second coupling elements in the assembled state, so that the coupling head and the receiving sleeve delimit a distribution space, wherein the coupling head advantageously has a coupling head groove over its entire circumference for receiving the coupling head sealing element. The coupling head sealing element advantageously allows the medium to be sprayed to escape from the distribution space only in the direction of the nozzle.

[0015] According to a particularly advantageous embodiment of the nozzle arrangement, the nozzle base is passed through a first nozzle base channel system for a gaseous medium and a second nozzle base channel system for a medium to be sprayed, so as to guide the corresponding medium from the pipeline arrangement to the nozzle independently of one another. To this end, the first nozzle base channel system comprises at least a number of nozzle base supply lines corresponding to the number of nozzles arranged in the nozzle base, so as to guide the gaseous medium to the corresponding nozzle. Advantageously, two nozzle base supply lines are assigned to each nozzle. The advantage of this design is that a better air distribution at the nozzle outlet of the nozzle can be ensured, so that the sprayed medium is atomized. The second nozzle base channel system comprises nozzle base supply lines corresponding to the number of nozzles arranged in the nozzle base, so as to guide the medium to be sprayed to the corresponding nozzle. Preferably, the nozzle base supply lines of the second nozzle base channel system connect the distribution space to the corresponding nozzle. The two nozzle base channel systems ensure that the nozzle base is very simply supplied with gaseous medium and the medium to be sprayed, and without maintenance.

[0016] The nozzle base is preferably configured in two parts, wherein the nozzle base cover and the nozzle base pot are advantageously connected to one another by means of a plug-in connection or a thread. The connection and fixation of the nozzle base cover to the nozzle base pot is thus achieved by means of a twisting plug-in movement. This connection has the advantage that the nozzle base cover and the nozzle base pot cannot be separated from one another even in the event of mechanical shocks, so that even if the nozzle base pot can be replaced simply and quickly, the nozzle is not cut off from the medium supply.

[0017] According to a further advantageous development of the nozzle device, the inner line arranged in the outer line comprises a flexible inner line section, which is advantageously guided by at least one gasket in the outer line. In this regard, the flexible inner line section is preferably arranged in a bending region of the line device. The gasket ensures that the inner line is always located in the desired position in the outer line. Preferably, the inner line arranged in the outer line is coaxially surrounded by the outer line. Particularly preferably, the flexible inner line section is prestressed, whereby the first coupling element is held in the second coupling element. In this respect, the prestress is generated in particular by an internal spring force of the flexible inner line section.

[0018] According to another advantageous development of the nozzle device, the connecting piece is connected to the line device on the supply side, thereby enabling a simple and uncomplicated connection of the line device to an existing line network. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in more detail below with reference to the accompanying drawings.

[0020] Figure 1 shows a top view of one embodiment of a nozzle arrangement;

[0021] Figure 2 The nozzle arrangement is shown along Figure 1 A cross-sectional view of the cutting plane AA is shown;

[0022] Figure 3 The nozzle arrangement is shown Figure 2 an enlarged view of detail B described in;

[0023] Figure 4 shows a top view of an embodiment of a nozzle arrangement;

[0024] Figure 5 shows a front view of a flexible inner pipeline section with a connector;

[0025] Figure 6 The flexible inner pipeline section is shown along Figure 5 A cross-sectional view of the cutting plane CC shown in FIG.

[0026] Figure 7 shows a side view of the coupling head;

[0027] Figure 8 Shows the joint edge Figure 7 A cross-sectional view of the cutting plane DD shown in FIG. DETAILED DESCRIPTION

[0028] Figure 1 A top view of an embodiment of a nozzle arrangement 1 is shown.

[0029] Figure 1 The nozzle arrangement 1 shown comprises a line arrangement 2 comprising an outer line 3 for conducting a gaseous medium. A connection piece 5 is connected to a supply side 4 of the line arrangement 2, while a nozzle base 8 comprising at least one nozzle 7 is connected to an outlet side 6 of the line arrangement 2 opposite the supply side 4.

[0030] Figure 2 The nozzle device 1 is shown along Figure 1 A cross-sectional view of cutting plane AA is shown.

[0031] The pipeline arrangement 2 including the outer pipeline 3 guiding the gaseous medium also includes an inner pipeline 9 arranged in the outer pipeline 3 and guiding the medium to be sprayed. An annular gap 85 serving as an outer pipeline flow passage 84 is formed between the outer pipeline 3 and the inner pipeline 9. In the illustrated embodiment, the inner pipeline 9 arranged in the outer pipeline 3 and forming the inner pipeline flow passage 86 is coaxially surrounded by the outer pipeline 3.

[0032] The inner pipeline 9 is composed of multiple parts. Thus, the inner pipeline 9 comprises a rigid inner pipeline section 10, preferably a straight pipe made of a metal material, and a flexible inner pipeline section 11 adjacent to the rigid inner pipeline section 10, preferably designed as a fabric-reinforced silicone hose or Guttasyn hose. The rigid inner pipeline section 10 is held in the outer pipeline 3 on the supply side 4 of the pipeline device 2 by means of a connector 5 and is connected to a connecting element 13 on the side 12 of the rigid inner pipeline section 10 facing away from the supply side 4. The flexible inner pipeline section 11 is connected to the connecting element 13 on the supply side and to the nozzle base 8 on the outlet side 6 of the pipeline device 2.

[0033] A mounting flange 14 is arranged on the outer pipeline 3 of the pipeline arrangement 2, which is arranged in a mounting plane CC perpendicular to the section AA at the only Figure 2 In the conical housing section 15 shown as an example in FIG. 1 . In a treatment module, the embodiment of the nozzle device 1 shown is particularly used to produce a top spray. The treatment module is preferably designed as a coating device, such as a drum coater, or as a fluidizing device, such as a fluidized bed or spouted bed device.

[0034] The connection piece 5 comprises a double flange 16 forming a double flange flow passage 87, whose outlet-side flange 17 is connected to an outer pipeline end flange 19 provided on the supply-side outer pipeline end section 18, so that the inner pipeline 9 and the outer pipeline 3 of the pipeline arrangement 2 on the supply side 4 are sealed. For this purpose, the flange 17 and the outer pipeline end section flange 19 are axially clamped by a clamping device 21 designed as a tri-clamp 20. In addition to the double flange 16, the connection piece 5 also comprises an inner pipeline coupling 23, which comprises an outlet-side inner pipeline coupling flange 22 and forms an inner pipeline coupling flow passage 88, wherein the inner pipeline coupling flange 22 is connected to the supply-side flange 24 of the double flange 16 and is axially clamped by a clamping device 26 designed as a tri-clamp 25, so that the double flange 16 extending the inner pipeline 9 of the pipeline arrangement 2 is sealed on the supply side 4 of the pipeline arrangement 2. In this regard, the inner pipeline flow passage 86 is fluidly connected to the double flange flow passage 87 and the inner pipeline coupling flow passage 88 .

[0035] The inner line connection 23 comprises a connection connector 27 for supplying the medium to be sprayed (advantageously a liquid, dispersion, emulsion or suspension) and a connection connector 28 for supplying the flushing medium (advantageously designed as flushing air). The design of the connection 5 enables a very simple replacement of the inner line connection 23, thereby enabling efficient replacement of the connection connectors 27, 28.

[0036] The outer line 3 is connected to a connecting pipe 29 to which an outer line coupling (not shown) can be plugged, through which a pressurized gaseous medium, advantageously spray air, can be supplied.

[0037] On the outlet side, the outer line 3 and the inner line 9 are connected to the two-part nozzle base 8, wherein the outer line 3 is connected to the nozzle base cover 30 and the inner line 9 (preferably a flexible inner line element 11) is connected to the nozzle base pot 31. The nozzle base cover 30 and the nozzle base pot 31 are connected to each other by a plug-in connection, wherein the plug-in connection is sealed by sealing elements 33a, b designed as annular seals 32a, b. The sealing elements 33a, b are arranged in grooves 34a, b assigned to the nozzle base cover 30 or the nozzle base pot 31, respectively. In an embodiment not shown, the nozzle base pot 31 and the nozzle base cover 30 are connected by threads, wherein the nozzle base cover 30 advantageously has an outer thread and the nozzle base pot 31 has an inner thread.

[0038] The redirection of the medium from the horizontal installation plane CC to the vertical injection plane DD required for the top injection takes place in the region of a bend 35 of the pipeline arrangement 2 , which is formed in particular by a 90° pipe elbow 36 , as in the embodiment shown.

[0039] In the region of the bend 35, the inner line 9 arranged inside the outer line 3 comprises a flexible inner line section 11, wherein the flexible inner line section 11 advantageously passes through a gasket 37 inside the outer line 3, as shown in the embodiment. In the present embodiment, three gaskets 37 are used.

[0040] Figure 3 The nozzle device 1 is shown Figure 2 3 is an enlarged view of detail B in FIG. The nozzle base body 8 is connected to the outer pipeline 3 via a nozzle base body cover 30, in particular welded. In addition, the nozzle base body 8 is detachably connected to the inner pipeline 9 via a nozzle base body pot 31. In order to achieve a detachable connection between the inner pipeline 9 and the nozzle base body 8, a coupling element 39 is arranged on the outlet-side inner pipeline end section 38 of the inner pipeline 9 and on the nozzle base body pot 31. In this regard, one coupling element 39 is provided as a first coupling element 39a and one coupling element 39 is provided as a second coupling element 39b, wherein the coupling elements 39 can be connected to each other by a plug connection. In the embodiment shown, the first coupling element 39a is arranged on the inner pipeline end section 38 of the inner pipeline 9, while the second coupling element 39b is arranged on the nozzle base body 8. Since the flexible inner pipeline section 11 of the inner pipeline 9, on which the first coupling element 39a is arranged, is under prestress, the first coupling element 39a is fixed in the second coupling element 39b.

[0041] The first coupling element 39a is configured as a coupling head 41 through which the coupling head channel system 40 passes, and the second coupling element 39b is configured as a receiving sleeve 43 including a receiving space 42, so that in the assembled state of the nozzle device 1, the inner line 9 is connected to the nozzle base 8, preferably the nozzle base tank 31. As a result, the medium to be sprayed can flow through the inner line flow channel 86 and the coupling head channel system 40 in the direction of the three nozzles 7. In this embodiment, the receiving space 42 of the receiving sleeve 43 is delimited by a receiving sleeve wall 44 and a receiving sleeve base 45.

[0042] The coupling head channel system 40 includes an input channel 46 having a longitudinal axis EE, which merges with a plurality of output channels 49 in a transition region 47, the plurality of output channels opening into a side surface 48 of the coupling head 41. In the embodiment shown, the plurality of output channels 49 are arranged at an angle to the longitudinal axis EE of the input channel 46. In addition, as shown in FIG. Figure 7As shown, the output channels are evenly distributed along the circumferential direction of the coupling head 41. In addition, each output channel 49 has an output channel cross-sectional area 50 that is many times smaller than the input channel cross-sectional area 51. Since the output channel cross-sectional area 50 is smaller than the input channel cross-sectional area 51, a screening effect is generated, through which coarse impurities in the medium to be sprayed can be filtered out. In addition, each output channel 49 advantageously has an output channel cross-sectional area 50 that is smaller than the nozzle outlet cross-sectional area 89 at the nozzle outlet 90 of the nozzle 7. This also ensures that impurities that are not retained by the output channel 49 can also flow through the nozzle outlet 90 unhindered and be sprayed, without blocking the nozzle 7 (especially at its nozzle outlet 90), or only blocking it in the worst case.

[0043] The coupling 41 comprises a coupling fastening device 52 for the inner line 9, wherein the coupling fastening device 52 is advantageously arranged as a coupling fastening sleeve 55, which comprises a first locking element 54, which comprises a locking lug 53. Here, the coupling fastening device 52 is penetrated by the coupling channel system 40, in particular the input channel 46.

[0044] In addition, the coupling 41 includes a cover element 56 placed on the coupling head fastening sleeve 55, which passes through the coupling head fastening device 52 at the rear side through the coupling head connecting sleeve 57. The cover element 56 is preferably a plastic material named PA2200 and is particularly manufactured as a 3D component using a laser sintering method. PA2200 is based on PA12 and has a wide range of potential applications. In addition, it also meets all biocompatibility requirements. In the illustrated embodiment, the coupling head connecting sleeve 57 is coaxially surrounded by the coupling head fastening device 52 (particularly the coupling head fastening sleeve 55). At the same time, the input channel 46 is also coaxially surrounded by the coupling head connecting sleeve 57.

[0045] The structural design of the coupling head 41 results in the formation of a space 58 between the coupling head connecting sleeve 57 and the coupling head fastening sleeve 55, into which the inner pipeline 9 having a second locking element 60 formed on its inner pipeline end section 38 to receive a locking groove 59 of the first locking element 54 can be introduced, so that the first locking element 54 of the coupling head fastening sleeve 55 and the inner pipeline 9, in particular the second locking element 60 of the flexible inner pipeline section 11, are operatively connected to each other. The coupling head 41 can also be connected to the outlet-side inner pipeline end section 38 of the inner pipeline 9 by another connection technology, for example, by a threaded connection, wherein the coupling head fastening sleeve 55 is provided with an internal thread, and the inner pipeline end section 38 of the inner pipeline 9 is provided with an external thread.

[0046] The first coupling element 39a provided as coupling head 41 has a coupling head sealing element 65 which seals between the first and second coupling elements 39a, b in the assembled state, so that the coupling head 41 and the receiving sleeve 43 delimit a distribution space 66, wherein the coupling head 41 advantageously has a coupling head groove 67 over its entire circumference for receiving the coupling head sealing element 65. The coupling head sealing element 65 is preferably designed as an annular seal 68. By introducing the medium to be sprayed into the distribution space 66, the medium is evenly distributed to the individual nozzles 7 arranged in the nozzle base 8.

[0047] In order to supply the nozzle 7 arranged on the two-part nozzle base 8 with the medium provided by the line arrangement 2, the nozzle base 8 is passed through a first nozzle base channel system 61 for the gaseous medium and a second nozzle base channel system 62 for the medium to be sprayed. This ensures that the corresponding media can be guided from the line arrangement 2 to the nozzle 7 independently of each other.

[0048] The first nozzle base channel system 61 includes at least a number of nozzle base supply lines 63 corresponding to the number of nozzles 7 arranged in the nozzle base 8, so as to guide the gaseous medium to the corresponding nozzle 7. In the embodiment shown, each nozzle is equipped with two nozzle base supply lines 63. At the nozzle outlet 90 of the nozzle 7, the two nozzle base supply lines 63 ensure better air distribution to atomize the medium to be sprayed. This also further reduces the spray medium deposits that may form at the nozzle outlet. As a result, the gaseous medium flows to the nozzle 7 via the nozzle base supply line 63 through the outer pipeline flow channel 84. The aforementioned connection of all flow channels for gaseous media is also referred to as an outer flow channel. The second nozzle base channel system 62 also includes a nozzle base supply line 64 corresponding to the number of nozzles 7 arranged in the nozzle base 8 to guide the medium to be sprayed to the corresponding nozzle 7. Here, the nozzle base supply line 64 of the second nozzle base channel system 62 connects the distribution space 66 and the corresponding nozzle 7 to each other. The medium to be sprayed flows through the inner pipe coupling flow channel 86, the double flange flow channel 87, the inner pipeline flow channel 86 and the connector channel system 40 in sequence, enters the distribution space 66, and flows from there to the nozzle 7 through the nozzle base supply pipeline 64. The connection of all the flow channels of the medium to be sprayed is also called an inner flow channel. Therefore, in this embodiment, the nozzle base 8 is penetrated by three nozzle base supply pipelines 63 and three nozzle base supply pipelines 64.

[0049] The nozzle base 8, here a nozzle base tank 31, comprises three nozzles 7, such as Figure 4 The nozzle arrangement 1 is shown in a bottom view. Different numbers of nozzles, such as four, five, six or more nozzles, are conceivable and feasible.

[0050] Figure 5A front view of the flexible inner pipeline section 11 with the coupling head 41 is shown.

[0051] The coupling head 41 is arranged on the inner line end section 38 of the inner line 9. Three gaskets 37 with passage openings 69 are arranged coaxially around the flexible inner line section 11. The passage openings 69 allow the gaseous medium to flow virtually undisturbed through the outer line flow channel 84 between the outer line 3 and the inner line 9 in the direction of the nozzle 7 arranged in the nozzle base 8.

[0052] Figure 6 Shows Figure 5 Cross-sectional view of the flexible inner pipeline section 11 through the cutting plane CC.

[0053] like Figure 2 As already explained in , the connecting element 13 is arranged in the outer line 3 to connect the rigid inner line section 10 to the flexible inner line section 11. The connecting element 13 comprises a connecting element channel 70 which is assigned to the inner line channel 86 and passes through the connecting element 13 in the flow direction of the medium to be sprayed.

[0054] In order to connect the rigid inner pipeline section 10 to the connecting element 13, the rigid inner pipeline section 10 has an outer thread 72 on its outlet-side end section 71, which is screwed into a connecting element channel section 74 having a web 73, so that an inner thread (not shown) corresponding to the outer thread 72 cuts into the web 73. The rigid inner pipeline section 10 is thus fixed in the connecting element 13.

[0055] Furthermore, the connecting element 13 comprises a connecting element fastening device 77, which is designed as a connecting element fastening sleeve 76 with an internal thread 75, for receiving the flexible inner pipeline section 11, through which the connecting element fastening device is penetrated by a connecting element connecting sleeve 78 of the connecting element 13. At the same time, an external thread 80 is provided on the supply-side end section 79 of the flexible inner pipeline section 11.

[0056] A space 81 is formed between the connecting element connecting sleeve 78 and the connecting element fastening sleeve 76, and a flexible inner pipeline section 11 having an external thread 80 at its end section 79 can be introduced into the space, so that the internal thread 75 of the connecting element fastening sleeve 76 and the external thread 80 of the flexible inner pipeline section 11 of the inner pipeline 9 interact and connect, and the flexible inner pipeline section 11 is fixed in the connecting element 13.

[0057] The connecting element 13 can also be connected to the rigid inner pipeline section 10 or the flexible inner pipeline section 11 by different connection technologies. For example, the connection between the rigid inner pipeline section 10 and the connecting element 13 and the connection between the flexible inner pipeline section 11 and the connecting element 13 can be established by a snap connection.

[0058] The connecting element 13 further comprises a passage opening 83 in its outer region 82 , whereby the gaseous medium can pass through the connecting element 13 located in the outer line 3 by flowing through the passage opening 83 in the direction of the nozzle 7 .

[0059] Figure 7 A side view of the coupling head 41 is shown, Figure 8 The coupling head 41 is shown Figure 7 A cross-sectional view of the cutting plane DD shown in FIG. Figure 7 and Figure 8 The detailed description has been described in the previous description. However, Figure 7 and Figure 8 Mainly to provide a better overview.

Claims

1. A nozzle device (1) comprising a pipeline device (2), the pipeline device comprising an outer pipeline (3) for guiding a gaseous medium and an inner pipeline (9) arranged in the outer pipeline (3) and guiding a medium to be sprayed, and also comprising a nozzle base (8) connected to the pipeline device (2) at an outlet side (6) and comprising at least one nozzle (7), wherein coupling elements (39) are respectively arranged on an inner pipeline end section (38) on the outlet side of the inner pipeline (9) and on the nozzle base (8), wherein: One connecting element (39) is configured as a first connecting element (39a), and one connecting element (39) is configured as a second connecting element (39b), wherein the connecting elements (39) can be connected to each other by a plug-in connection, characterized in that the first connecting element (39a) is configured as a connecting head (41) through which a connecting head channel system (40) passes, and the second connecting element (39b) is configured as a receiving sleeve (43) including a receiving space (42), so that in the assembled state of the nozzle device (1), the inner pipeline (9) is connected to the nozzle base (8), and the medium to be sprayed can flow from the inner pipeline (9) in the direction of at least one nozzle (7).

2. The nozzle device (1) according to claim 1, characterized in that The first coupling element (39a) is arranged on an inner line end section (38) of the inner line (9), and the second coupling element (39b) is arranged on the nozzle base body (8).

3. The nozzle device (1) according to claim 2, characterized in that The receiving space (42) is delimited by a receiving sleeve wall (44) and a receiving sleeve base (45).

4. The nozzle device (1) according to any one of the preceding claims, characterized in that The coupling head channel system (40) comprises an input channel (46) having a longitudinal axis (EE) which merges in a transition region (47) with a plurality of output channels (49) which open out on a side surface (48) of the coupling head (41).

5. The nozzle device (1) according to claim 4, characterized in that The plurality of output channels (49) are arranged at an angle to a longitudinal axis (EE) of the input channel (46).

6. The nozzle device (1) according to claim 4 or 5, characterized in that The output channels (49) are evenly distributed along the circumferential direction of the coupling head (41).

7. The nozzle device (1) according to any one of claims 4 to 6, characterized in that Each output channel (49) has an output channel cross-sectional area (50) that is many times smaller than the input channel cross-sectional area (51).

8. The nozzle device (1) according to any one of claims 4 to 7, characterized in that Each output channel (49) has an output channel cross-sectional area (50) that is smaller than the nozzle outlet cross-sectional area (89).

9. The nozzle device (1) according to any one of the preceding claims, characterized in that The coupling head (41) comprises a coupling head fastening device (52) for the inner pipeline (9), wherein the coupling head fastening device (52) is advantageously configured as a coupling head fastening sleeve (55) having an internal thread or a first locking element (54).

10. The nozzle device (1) according to claim 9, characterized in that The coupling head (41) has a cover element (56) which is placed onto the coupling head fastening sleeve (55).

11. The nozzle device (1) according to claim 9 or 10, characterized in that The coupling head fastening device (52) is penetrated by the coupling head channel system (40).

12. The nozzle device (1) according to claim 10 or 11, characterized in that The cover element (56) passes through the coupling head fastening device (52) at the rear side via a coupling head connecting sleeve (57).

13. The nozzle device (1) according to claim 12, characterized in that The coupling head connecting sleeve (57) is coaxially surrounded by the coupling head fastening device (52), advantageously coaxially surrounded by the coupling head fastening sleeve (55).

14. The nozzle device (1) according to claim 12 or 13, characterized in that The inlet channel (46) is coaxially surrounded by the coupling head connecting sleeve (57).

15. The nozzle device (1) according to any one of claims 12 to 14, characterized in that A space (58) is included between the coupling head connecting sleeve (57) and the coupling head fastening sleeve (55), and an inner pipeline (9) having an external thread or a second locking element (60) on its inner pipeline end section (38) can be introduced into the space, so that the internal thread or the first locking element (54) of the coupling head fastening sleeve (55) and the external thread or the second locking element (60) of the inner pipeline (9) are operatively connected to each other.

16. The nozzle device (1) according to any one of the preceding claims, characterized in that The first coupling element (39a) configured as a coupling head (41) has a coupling head sealing element (65) which seals between the first and second coupling elements (39a, 39b) in the assembled state, so that the coupling head (41) and the receiving sleeve (43) define a distribution space (66), wherein the coupling head (41) advantageously has a coupling head groove (67) for receiving the coupling head sealing element (65) over its entire periphery.

17. The nozzle device (1) according to any one of the preceding claims, characterized in that The nozzle base body (8) is penetrated by a first nozzle base body channel system (61) for the gaseous medium and a second nozzle base body channel system (62) for the medium to be sprayed, in order to conduct the respective media independently of one another from the line arrangement (2) to the nozzle (7).

18. The nozzle device (1) according to claim 17, characterized in that The first nozzle base channel system (61) comprises nozzle base supply lines (63) at least in number corresponding to the number of nozzles (7) arranged in the nozzle base (8) in order to guide the gaseous medium to the respective nozzles (7).

19. The nozzle device (1) according to any one of claims 17 or 18, characterized in that The second nozzle base channel system (62) comprises nozzle base supply lines (64) corresponding to the number of nozzles (7) arranged in the nozzle base (8) in order to guide the medium to be sprayed to the corresponding nozzles (7).

20. The nozzle device (1) according to claims 16 and 19, characterized in that A nozzle base body supply line (64) of the second nozzle base body channel system (62) connects the distribution space (66) and the corresponding nozzle (7) to one another.

21. The nozzle device (1) according to any one of the preceding claims, characterized in that The nozzle base body (8) is configured in two parts, wherein the nozzle base body cover (30) and the nozzle base body pot (31) are advantageously connected to each other via a plug-in connection or a thread.

22. The nozzle device (1) according to any one of the preceding claims, characterized in that An inner pipeline (9) arranged inside the outer pipeline (3) comprises a flexible inner pipeline section (11) which is advantageously guided by at least one spacer (37) inside the outer pipeline (3).

23. The nozzle device (1) according to claim 22, characterized in that The flexible inner pipeline section (11) is arranged in the region of a bend (35) of the pipeline arrangement (2).

24. The nozzle device (1) according to claim 22 or 23, characterized in that The flexible inner pipeline section (11) is under prestressing, whereby the first coupling element (39a) is held in the second coupling element (39b).

25. The nozzle device (1) according to any one of the preceding claims, characterized in that An inner pipeline (9) arranged inside the outer pipeline (3) is coaxially surrounded by the outer pipeline (3).

26. The nozzle device (1) according to any one of the preceding claims, characterized in that A connection piece (5) is connected to the line arrangement (2) at the supply side (4).

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