Nozzle assembly

Abstract

The invention relates to a nozzle assembly (1) having: a line assembly (2) which has an outer line (3) which guides a gaseous medium and an inner line (9) which is arranged within the outer line (3) and guides a medium to be sprayed; a nozzle main body (8) which is connected on an outlet side (6) to the line assembly (2) and has at least one nozzle (7), wherein on an outlet-side inner line end portion (38) of the inner line (9) and on the nozzle main body (8) one coupling element (39) is arranged in each case, wherein one coupling element (39) is designed as a first coupling element (39a) and one coupling element (39) is designed as a second coupling element (39b), wherein the coupling elements (39, 39a, 39b) can be coupled to one another by means of a plug connection, wherein the first coupling element (39a) is designed as a coupling head (41) penetrated by a coupling head channel system (40) and the second coupling element (39b) is designed as a receiving bushing (43) having a receiving space (42), such that in the assembled state of the nozzle assembly (1), the inner line (9) is connected to the nozzle main body (8) and the medium to be sprayed can flow from the inner line (9) in the direction of the at least one nozzle (7).

Description

[0001] Nozzle arrangement

[0002] The invention relates to a nozzle arrangement with a line arrangement which has an outer line carrying a gaseous medium and an inner line arranged within the outer line and carrying a medium to be sprayed, with a nozzle base body which is connected to the line arrangement on an outlet side and has at least one nozzle, wherein a coupling element is arranged on an outlet-side inner line end section of the inner line and on the nozzle base body, wherein in this regard one coupling element is designed as a first coupling element and one coupling element as a second coupling element, so that the coupling elements can be coupled to one another by means of a plug connection.

[0003] Nozzle arrangements have been known since the state of the art:

[0004] EP 1 871 534 B1 discloses a spray nozzle for a fluidized bed device with a central liquid outlet for a liquid coating agent and an annular air outlet for the coaxial supply of atomizing air, wherein the annular air outlet is delimited by an enveloping body which can be held in a wall of the housing of the fluidized bed device, in particular in the base, that the enveloping body has a central bore and is connected to a source of the atomizing air via an air pipe, that an axially displaceable nozzle head is mounted centrally within the enveloping body, in which the central liquid outlet is formed, wherein the nozzle head rests against an axial stop within the central bore, that the nozzle head is connected to a source of the liquid coating agent via a liquid pipe,wherein the liquid pipe has a flexible pipe section in the region of a bend and is guided centrally within the air pipe and that the liquid pipe is mounted axially displaceably in a closure in the air pipe.,

[0005] DE 10 2016 122 133 A1 discloses a line arrangement for a spray nozzle arrangement, wherein the spray nozzle arrangement has both a flexible inner line and a flexible outer line. The spray nozzle arrangement is further equipped with a nozzle head and a connecting piece, which are designed to be inserted into a nozzle head holder and a coupling piece of a treatment module, between which a jacket pipe of the treatment module extends, accommodating the line arrangement. This allows the line arrangement as a whole to be positioned very precisely in an application position, in particular without any adjustment work on the nozzle head.

[0006] A disadvantage of the nozzle assemblies shown in the prior art is that the coupling of the inner line to the nozzle body is designed as a hose-connecting nozzle combination, which allows coupling or decoupling only after disassembling the nozzle assembly. The object of the invention is therefore to provide a nozzle assembly that overcomes the disadvantages of the prior art.

[0007] This object is achieved in a nozzle arrangement of the type mentioned at the outset in that the first coupling element is designed as a coupling head through which a coupling head channel system passes, and the second coupling element is designed as a receiving bushing having a receiving space, so that in the assembled state of the nozzle arrangement, 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 at least one nozzle. By configuring the first and second coupling elements in this way, coupling or decoupling is possible even in the assembled state of the nozzle arrangement.

[0008] In an advantageous development of the nozzle arrangement in this regard, the first coupling element is arranged at the end section of the inner conduit, and the second coupling element is arranged at the nozzle base body. The assignment of the first coupling element to the inner conduit end section and the second coupling element to the nozzle base body allows for a less complex design of the nozzle arrangement and is thus more cost-effective.

[0009] Furthermore, the receiving space is limited by a receiving socket wall and a receiving socket base.

[0010] According to an advantageous embodiment of the nozzle arrangement, the coupling head channel system has an inlet channel having a longitudinal axis, which, in a transition region, merges into a plurality of outlet channels opening onto a lateral surface of the coupling head. In particular, the plurality of outlet channels is arranged at an angle to the longitudinal axis of the inlet channel and / or the outlet channels are evenly distributed in the circumferential direction of the coupling head. By means of such an arrangement of the outlet channels, the nozzles arranged in the nozzle base body can advantageously be supplied with the medium to be sprayed.

[0011] Preferably, each outlet channel has a cross-sectional area that is many times smaller than the cross-sectional area of ​​the input channel. The outlet channels accordingly have a sieving function in that, due to their cross-sectional area that is many times smaller than the cross-sectional area of ​​the input channel, they retain coarse impurities carried in the medium to be sprayed, which could clog the nozzles arranged in the nozzle body. In the event that the outlet channels of the coupling head channel system are clogged with large impurities, it is possible to easily remove and replace the inner line including the coupling head, even during the process, without having to dismantle the nozzle arrangement. Particularly preferably, each outlet channel has an outlet channel cross-sectional area which is smaller than a nozzle outlet cross-sectional area.This also ensures that impurities not retained by the outlet channels can also pass through a nozzle outlet unhindered and do not clog the nozzle or, in the worst case, block it.

[0012] According to a further advantageous embodiment of the nozzle arrangement, the coupling head has a coupling head fastening device for the inner line, wherein the coupling head fastening device is expediently designed as a coupling head fastening sleeve having an internal thread or a first locking element. The coupling head fastening device is preferably penetrated by the coupling head channel system. Via such a coupling head fastening device, the inner line can be easily and permanently connected to the coupling head and can be flowed through by the medium to be sprayed.

[0013] In an advantageously further developed nozzle arrangement, the coupling head has a cap element placed on the coupling head fastening sleeve, wherein the cap element expediently penetrates the rear of the coupling head fastening device with a coupling head connection sleeve. The cap element placed on the coupling head fastening sleeve enables optimal adaptation of the first coupling element designed as a coupling head to the second coupling element designed as a receiving socket. In addition, the coupling head connection sleeve further improves and permanently secures the connection of the inner line to the coupling head. Preferably, the coupling head connection sleeve is coaxially enclosed by the coupling head fastening device, expediently by the coupling head fastening sleeve and further preferably the input channel is coaxially enclosed by the coupling head connection sleeve.Furthermore, a space is created between the coupling head connection sleeve and the coupling head fastening sleeve, into which space the inner line, which has an external thread or a second locking element at its end section, can be inserted, 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 line are operatively connected to one another. This ensures simple and permanent fastening of the inner line to the first coupling element designed as a coupling head.According to an additional advantageous development of the nozzle arrangement, the first coupling element, designed as a coupling head, has a coupling head sealing element that, in the assembled state, seals between the first and the second coupling element, so that the coupling head and the receiving bushing delimit a distribution chamber, wherein the coupling head expediently 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 chamber exclusively in the direction of the nozzle.

[0014] According to a particularly advantageous embodiment of the nozzle arrangement, the nozzle base body is penetrated by a first nozzle base body channel system for the gaseous medium and a second nozzle base body channel system for the medium to be sprayed, in order to guide the corresponding media separately from the line arrangement to the nozzle. For this purpose, the first nozzle base body channel system has at least one nozzle base body supply line corresponding to the number of nozzles arranged in the nozzle base body, in order to guide the gaseous medium to the respective nozzle. Expediently, each nozzle is assigned two nozzle base body supply lines. The advantage of this embodiment is that better air distribution for atomizing the medium to be sprayed is ensured at the nozzle outlet.The second nozzle body channel system has a number of nozzle body supply lines corresponding to the number of nozzles arranged in the nozzle body, in order to guide the medium to be sprayed to the respective nozzle. Preferably, the nozzle body supply lines of the second nozzle body channel system connect the distribution chamber and the respective nozzle. The two nozzle body channel systems ensure a very simple and maintenance-free supply of the gaseous medium and the medium to be sprayed to the nozzles in the nozzle body.

[0015] 5 The nozzle base body is preferably constructed in two parts, with a nozzle base body cover and a nozzle base body cup expediently being connected to one another by means of a bayonet lock or a thread. The nozzle base body cover and nozzle base body cup are thus connected and secured by a twisting and plugging movement. The advantage of this connection is that even in the event of mechanical shocks, the nozzle base body cover and nozzle base body cup do not separate from one another, so that the nozzles are not cut off from a media supply despite the nozzle base body cup being easy and quick to replace.

[0016] According to an additional advantageous development of the nozzle arrangement, the inner line arranged within the outer line has a flexible inner line section, which is expediently guided by at least one spacer within the outer line. In this regard, the flexible inner line section is preferably arranged in a region of a bend in the line arrangement. The spacers ensure that the inner line is always positioned in the desired position in the outer line. The inner line arranged within the outer line is preferably coaxially enclosed by the outer line. Particularly preferably, the flexible inner line section is under prestress, whereby the first coupling element is held in the second coupling element. The prestress is generated in this regard in particular by the internal spring force of the flexible inner line section.According to an additional advantageous development of the nozzle arrangement, a connector is connected to the line arrangement on one supply side. This enables simple and uncomplicated connection of the line arrangement to the existing piping network.

[0017] The invention is explained in more detail below using the attached drawing, which shows

[0018] Figure 1 is a plan view of an embodiment of the nozzle arrangement,

[0019] Figure 2 is a sectional view of the nozzle arrangement through a section plane AA shown in Fig. 1,

[0020] Figure 3 is an enlarged view of section B of the nozzle arrangement shown in Fig. 2,

[0021] Figure 4 is a bottom view of an embodiment of the nozzle arrangement,

[0022] Figure 5 is a front view of a coupling head on a flexible inner line section,

[0023] Figure 6 is a sectional view of the flexible inner line section through a section plane CC shown in Fig. 5,

[0024] Figure 7 is a side view of the coupling head and

[0025] Figure 8 is a sectional view of the coupling head through a cutting plane DD shown in Fig . 7 .

[0026] Fig. 1 shows a plan view of an embodiment of the nozzle arrangement 1. The nozzle arrangement 1 shown in Fig. 1 has a line arrangement 2 which has an external line 3 carrying a gaseous medium. A connecting piece 5 is connected to a supply side 4 of the line arrangement 2, while a nozzle base body 8 having at least one nozzle 7 is connected to an outlet side 6 of the line arrangement 2 opposite the supply side 4.

[0027] Fig. 2 shows a sectional view of the nozzle arrangement 1 through a sectional plane AA shown in Fig. 1.

[0028] The line arrangement 2, which carries the gaseous medium, has an inner line 9 arranged within the outer line 3 and carrying a medium to be sprayed. An annular gap 85 serving as an outer line flow channel 84 is formed between the outer line 3 and the inner line 9. The inner line 9, which is arranged within the outer line 3 and forms an inner line flow channel 86, is coaxially enclosed by the outer line 3 in the embodiment shown.

[0029] The inner line 9 is made up of several parts. Accordingly, the inner line 9 has a rigid inner line section 10, preferably a straight tube made of metallic material, and a flexible inner line section 11 which adjoins the rigid inner line section 10 and is preferably designed as a fabric-reinforced silicone hose or as a Guttasyn hose. The rigid inner line section 10 is held in the outer line 3 on the supply side 4 of the line arrangement 2 by the connecting piece 5 and is connected to a connecting element 13 on a side 12 of the rigid inner line section 10 facing away from the supply side 4. The flexible inner line section 11 is connected to the connecting element 13 on the supply side and to the nozzle base body 8 on the outlet side 6 of the line arrangement 2.

[0030] On the outer line 3 of the line arrangement 2, a mounting flange 14 is arranged, which is mounted in a

[0031] 5 Fig. 2 shows an exemplary conical outer casing section 15 of a treatment module (not shown in detail) arranged in a mounting plane CC oriented perpendicular to the section plane AA. In the treatment module, the embodiment of the nozzle arrangement 1 shown is used in particular to generate a top spray. The treatment module is preferably designed as a coating device, such as a drum coater, or as a fluidization apparatus, such as a fluidized bed or spouted bed apparatus.

[0032] The connecting piece 5 has a double flange 16 forming a double-flange flow channel 87, the outlet-side flange 17 of which is connected to an outer line end section flange 19 arranged on a supply-side outer line end section 18 in such a way that the inner line 9 and the outer line 3 of the line arrangement 2 are sealed on the supply side 4. For this purpose, the flange 17 and the outer line end section flange 19 are clamped in the axial direction by means of a clamping device 21 designed as a Tri-Clamp 20.In addition to the double flange 16, the connecting piece 5 further has an inner line coupling piece 23 having an outlet-side inner line coupling piece flange 22 and forming an inner line coupling piece flow channel 88, wherein the inner line coupling piece flange 22 is connected to the supply-side flange 24 of the double flange 16 and is clamped in the axial direction by means of a clamping device 26 designed as a Tri-Clamp 250, so that the double flange 16 extending the inner line 9 of the line arrangement 2 is sealed on the supply side 4 of the line arrangement 2. In this respect, the inner line flow channel 86 is fluidly connected to the double flange flow channel 87 and the inner line coupling piece flow channel 88.

[0033] The inner line coupling piece 23 has a coupling piece connection 27 for feeding the medium to be sprayed, expediently a liquid, a dispersion, an emulsion, or a suspension, and a coupling piece connection 28 for feeding a flushing medium, expediently designed as flushing air. The described design of the connecting piece 5 enables a very simple replacement of the inner line coupling piece 23, whereby the coupling piece connections 27, 28 can be exchanged efficiently.

[0034] The external line 3 is connected to a connecting piece 29, onto which an external line coupling piece (not shown) can be plugged, via which the pressurized gaseous medium, expediently spray air, can be fed.

[0035] On the outlet side, the outer line 3 and the inner line 9 are connected to the two-part nozzle base body 8, wherein the outer line 3 is connected to a nozzle base body cover 30 and the inner line 9, preferably the flexible inner line element 11, is connected to a nozzle base body cup 31. The nozzle base body cover 30 and the nozzle base body cup 31 are connected to one another by means of a bayonet closure, wherein the bayonet closure is sealed by sealing elements 33a, b designed as ring seals 32a, b. The sealing elements 33a, b are each arranged in a groove 34a, b assigned to the nozzle base body cover 30 or the nozzle base body cup 31.In an embodiment not shown, the connection of the nozzle base body pot 31 and the nozzle base body cover 30 was made by means of a thread, wherein the nozzle base body cover 30 expediently has an external thread and the nozzle base body pot 31 has an internal thread.

[0036] The deflection of the media from a horizontal mounting plane CC into a vertical spray plane DD, which is necessary for a top spray, takes place in the region of a bend 35 of the line arrangement 2, which is formed in particular by a 90° pipe bend 36, as in the embodiment shown.

[0037] In the region of the bend 35, the inner line 9 arranged within the outer line 3 has the flexible inner line section 11, wherein the flexible inner line section 11 is expediently guided, as shown in the embodiment, by spacers 37 within the outer line 3. In the embodiment, three spacers 37 are used.

[0038] An enlarged view of section B of the nozzle arrangement 1 shown in Fig. 2 is shown in Fig. 3. The nozzle base body 8 is connected, in particular welded, to the outer line 3 by means of the nozzle base body cover 30. Furthermore, the nozzle base body 8 is detachably connected to the inner line 9 by means of the nozzle base body cup 31. For the detachable connection between the inner line 9 and the nozzle base body 8, a coupling element 39 is arranged on an outlet-side inner line end section 38 of the inner line 9 and on the nozzle base body cup 31. In this regard, one coupling element 39 is designed as a first coupling element 39a and one coupling element 39 as a second coupling element 39b, wherein the coupling elements 39 can be coupled to one another by means of a plug connection.In the embodiment shown, the first coupling element 39a is arranged on the inner line end section 38 of the inner line 9 and the second coupling element 39b is arranged on the nozzle base body 8. Due to the fact that the flexible inner line section 11 of the inner line 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.

[0039] The first coupling element 39a is designed as a coupling head 41 through which a coupling head channel system 40 passes, and the second coupling element 39b is designed as a receiving bushing 43 having a receiving space 42, so that in the assembled state of the nozzle arrangement 1, the inner line 9 is connected to the nozzle base body 8, preferably the nozzle base body cup 31. The medium to be sprayed can thus flow through the inner line flow channel 86 and the coupling head channel system 40 in the direction of the three nozzles 7. The receiving space 42 of the receiving bushing 43 is delimited in the embodiment by a receiving bushing wall 44 and a receiving bushing base 45.

[0040] The coupling head channel system 40 has an inlet channel 46 which has a longitudinal axis EE and which, in a transition region 47, merges into a plurality of outlet channels 49 which open out onto a lateral surface 48 of the coupling head 41. In the embodiment shown, the plurality of outlet channels 49 are arranged at an angle to the longitudinal axis EE of the inlet channel 46. Furthermore, the outlet channels are evenly distributed in the circumferential direction of the coupling head 41, as can be seen better in Fig. 7. In addition, each outlet channel 49 has an outlet channel cross-sectional area 50 which is many times smaller than an input channel cross-sectional area 51. Due to the smaller exit channel cross-sectional area 50 compared to the inlet channel cross-sectional area 51, a sieve effect is created by which coarse impurities in the medium to be sprayed can be filtered out.Furthermore, each outlet channel 49 expediently has an outlet channel cross-sectional area 50 which is smaller than a nozzle outlet cross-sectional area 89 at the nozzle outlet 90 of the nozzle 7. This additionally ensures that impurities not retained by the outlet channels 49 can also flow unhindered through a nozzle outlet 90 and are sprayed without clogging the nozzle 7, in particular at its nozzle outlet 90, or in the worst case, blocking it.

[0041] The coupling head 41 has a coupling head fastening device 52 for the inner line 9, wherein the coupling head fastening device 52 is expediently designed as a coupling head fastening sleeve 55 having a first locking element 54 with a locking lug 53. The coupling head fastening device 52 is penetrated by the coupling head channel system 40, in particular by the input channel 46.

[0042] In addition, the coupling head 41 has a cap element 56 placed on the coupling head fastening sleeve 55, which penetrates the rear of the coupling head fastening device 52 with a coupling head connection sleeve 57. The cap element 56 is preferably a plastic with the material designation PA2200 and is manufactured in particular as a 3D component using a laser sintering process. PA2200, which is based on PA12, offers a wide range of possible applications. In addition, it meets all requirements for biocompatibility. In the embodiment shown, the coupling head connection sleeve 57 is coaxially enclosed by the coupling head fastening device 52, in particular by the coupling head fastening sleeve 55. At the same time, the inlet channel 46 is also coaxially enclosed by the coupling head connection sleeve 57.The structural design of the coupling head 41 results in a space 58 being created between the coupling head connection sleeve 57 and the coupling head fastening sleeve 55, into which space the inner line 9 can be inserted, said space having a second locking element 60 designed as a locking recess 59 receiving the first locking element 54 on its inner line end section 38, so that the first locking element 54 of the coupling head fastening sleeve 55 and the second locking element 60 of the inner line 9, in particular of the flexible inner line section 11, are operatively connected to one another. The coupling head 41 can also be connected to the outlet-side inner line end section 38 of the inner line 9 using a different connection technology, e.g. by a thread, wherein an internal thread is arranged on the coupling head fastening sleeve 55 and an external thread is arranged on the inner line end section 38 of the inner line 9.

[0043] The first coupling element 39a, designed as a coupling head 41, has a coupling head sealing element 65 which, in the assembled state, seals between the first and the second coupling element 39a, b, so that the coupling head 41 and the receiving bushing 43 delimit a distribution chamber 66, wherein the coupling head 41 expediently 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 chamber 66, said medium is distributed evenly between the individual nozzles 7 arranged in the nozzle base body 8.

[0044] To supply the nozzles 7 arranged on the two-part nozzle base body 8 with the media provided via the line arrangement 2, 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. This ensures that the corresponding media can be guided from the line arrangement 2 to the nozzle 7 separately from one another.

[0045] The first nozzle base body channel system 61 has at least one nozzle base body supply line 63 corresponding to the number of nozzles 7 arranged in the nozzle base body 8, in order to conduct the gaseous medium to the respective nozzle 7. In the embodiment shown, two nozzle base body supply lines 63 are assigned to each nozzle. At the nozzle outlet 90 of the nozzle 7, the two nozzle base body supply lines 63 ensure better air distribution for atomizing the medium to be sprayed. Any deposits of the medium to be sprayed that may occur at the nozzle outlet are also further reduced as a result. The gaseous medium thus flows through the outer line flow channel 84 via the nozzle base body supply lines 63 to the nozzle 7. The aforementioned connection of all flow channels for the gaseous medium is also referred to as the outer flow channel.The second nozzle base body channel system 62 also has a number of nozzle base body supply lines 64 corresponding to the number of nozzles 7 arranged in the nozzle base body 8, in order to guide the medium to be sprayed to the respective nozzle 7. The nozzle base body supply lines 64 of the second nozzle base body channel system 62 connect the distribution chamber 66 and the respective nozzle 7 to one another. The medium to be sprayed flows accordingly through the inner line coupling piece flow channel 86, the double flange flow channel 87, the inner line flow channel 86 and the coupling head channel system 40 into the distribution chamber 66 and from there via the nozzle base body supply lines 64 to the nozzle 7. The aforementioned connection of all flow channels for the medium to be sprayed is also referred to as the inner flow channel.In the exemplary embodiment, the nozzle base body 8 is thus penetrated by three nozzle base body supply lines 63 and three nozzle base body supply lines 64.

[0046] The nozzle base body 8, here the nozzle base body pot 31, has three nozzles 7, as shown in the bottom view of the nozzle arrangement 1 shown in Fig. 4. A different number of nozzles, e.g., four, five, six or more nozzles, is conceivable and feasible.

[0047] Fig. 5 shows a front view of the flexible inner line section 11 having a coupling head 41.

[0048] The coupling head 41 is arranged at the inner line end section 38 of the inner line 9. Three spacers 37 having through-openings 69 are arranged coaxially around the flexible inner line section 11. The through-openings 69 allow the gaseous medium to flow virtually unhindered through the outer line flow channel 84 between the outer line 3 and the inner line 9 in the direction of the nozzles 7 arranged in the nozzle base body 8.

[0049] A sectional view of the flexible inner line section 11 through a cutting plane CC shown in Fig. 5 is shown in Fig. 6.

[0050] As already explained in Fig. 2, 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 has a connecting element channel 70 associated with the inner line channel 86, which passes through the connecting element 13 in the flow direction of the medium to be sprayed.

[0051] To connect the rigid inner line section 10 to the connecting element 13, the rigid inner line section 10 has an external thread 72 on its outlet-side end section 71, which is screwed into a connecting element channel section 74 having lamellae 73, so that an internal thread (not shown) corresponding to the external thread 72 cuts into the lamellae 73. Thus, the rigid inner line section 10 is fixed in the connecting element 13.

[0052] Furthermore, the connecting element 13 has a connecting element fastening device 77 designed as a connecting element fastening sleeve 76 having an internal thread 75 for receiving the flexible inner line section 11, which is penetrated by a connecting element connection sleeve 78 of the connecting element 13. At the same time, an external thread 80 is arranged on a supply-side end section 79 of the flexible inner line section 11.

[0053] A space 81 is created between the connecting element connection sleeve 78 and the connecting element fastening sleeve 76, into which space the flexible inner line section 11, which has the external thread 80 on its end section 79, can be introduced, so that the internal thread 75 of the connecting element fastening sleeve 76 and the external thread 80 of the flexible inner line section 11 of the inner line 9 are operatively connected to one another and the flexible inner line section 11 is fixed in the connecting element 13. The connecting element 13 can also be connected to the rigid inner line section 10 or the flexible inner line section 11 by means of a different connection technology. For example, both the connection of the rigid inner line section 10 to the connecting element 13 and the connection of the flexible inner line section 11 to the connecting element 13 are established by means of a snap-in connection.

[0054] The connecting element 13 additionally has passage openings 83 in its outer region 82, whereby the gaseous medium can pass through the connecting element 13 positioned in the outer line 3 by flowing through the passage openings 83 in the direction of the nozzle 7.

[0055] Fig. 7 shows a side view of the coupling head 41, and Fig. 8 shows a sectional view of the coupling head 41 through a sectional plane DD shown in Fig. 7, wherein a detailed description of Figs. 7 and 8 has already been anticipated by the previous description. However, Figs. 7 and 8 serve in particular to provide a better overview.

Claims

Claims 1. Nozzle arrangement (1) with a line arrangement (2) which has an outer line (3) carrying a gaseous medium and an inner line (9) arranged within the outer line (3) and carrying a medium to be sprayed, with a nozzle base body (8) which is connected to the line arrangement (2) on an outlet side (6) and has at least one nozzle (7), wherein a coupling element (39) is arranged on an outlet-side inner line end section (38) of the inner line (9) and on the nozzle base body (8), wherein in this regard, one coupling element (39) is designed as a first coupling element (39a) and one coupling element (39) is designed as a second coupling element (39b), wherein the coupling elements (39) can be coupled to one another by means of a plug connection, characterized in thatthat the first coupling element (39a) is designed as a coupling head (41) through which a coupling head channel system (40) passes, and the second coupling element (39b) is designed as a receiving bushing (43) having a receiving space (42), so that in the assembled state of the nozzle arrangement (1), the inner line (9) is connected to the nozzle base body (8) and the medium to be sprayed can flow from the inner line (9) in the direction of the at least one nozzle (7).

2. Nozzle arrangement (1) according to claim 1, characterized in that the first coupling element (39a) on the 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. Nozzle arrangement (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. Nozzle arrangement (1) according to one of the preceding claims, characterized in that the coupling head channel system (40) has an inlet channel (46) having a longitudinal axis (EE) which, in a transition region (47), merges into a plurality of outlet channels (49) opening out onto a lateral surface (48) of the coupling head (41).

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

6. Nozzle arrangement (1) according to claim 4 or 5, characterized in that the output channels (49) are arranged uniformly distributed in the circumferential direction of the coupling head (41).

7. Nozzle arrangement (1) according to one of claims 4 to 6, characterized in that each outlet channel (49) has an outlet channel cross-sectional area (50) which is many times smaller than an inlet channel cross-sectional area (51).

8. Nozzle arrangement (1) according to one of claims 4 to 7, characterized in that each outlet channel (49) has an outlet channel cross-sectional area (50) which is smaller than a nozzle outlet cross-sectional area (89).

9. Nozzle arrangement (1) according to one of the preceding claims, characterized in that the coupling head (41) has a coupling head fastening device (52) for the inner line (9), wherein the coupling head fastening device (52) is expediently designed as a coupling head fastening sleeve (55) having an internal thread or a first locking element (54).

10. Nozzle arrangement (1) according to claim 9, characterized in that the coupling head (41) has a cap element (56) placed on the coupling head fastening sleeve (55).

11. Nozzle arrangement (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. Nozzle arrangement (1) according to claim 10 or 11, characterized in that the cap element (56) penetrates the coupling head fastening device (52) on the rear side with a coupling head connection sleeve (57).

13. Nozzle arrangement (1) according to claim 12, characterized in that the coupling head connection sleeve (57) is coaxially enclosed by the coupling head fastening device (52), expediently by the coupling head fastening sleeve (55).

14. Nozzle arrangement (1) according to claim 12 or 13, characterized in that the inlet channel (46) is coaxially enclosed by the coupling head connection sleeve (57).

15. Nozzle arrangement (1) according to one of claims 12 to 14, characterized in that between the coupling head A space (58) is spanned between the connecting sleeve (57) and the coupling head fastening sleeve (55), into which space the inner line (9) having an external thread or a second locking element (60) on its inner line end section (38) can be introduced, 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 line (9) are operatively connected to one another.

16. Nozzle arrangement (1) according to one of the preceding claims, characterized in that the first coupling element (39a) designed as a coupling head (41) has a coupling head sealing element (65) which, in the assembled state, seals between the first and the second coupling element (39a, 39b), so that the coupling head (41) and the receiving bush (43) delimit a distribution space (66), wherein the coupling head (41) expediently has a coupling head groove (67) over its entire circumference for receiving the coupling head sealing element (65).

17. Nozzle arrangement (1) according to 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 guide the corresponding media separately from one another from the line arrangement (2) to the nozzle (7).

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

19. Nozzle arrangement (1) according to one of claims 17 or 18, characterized in that the second nozzle base body channel system (62) has a number of nozzle base body supply lines (64) corresponding to a number of nozzles (7) arranged in the nozzle base body (8) in order to guide the medium to be sprayed to the respective nozzle (7).

20. Nozzle arrangement (1) according to claims 16 and 19, characterized in that the nozzle base body supply lines (64) of the second nozzle base body channel system (62) connect the distribution space (66) and the respective nozzle (7) to one another.

21. Nozzle arrangement (1) according to one of the preceding claims, characterized in that the nozzle base body (8) is designed in two parts, wherein a nozzle base body cover (30) and a nozzle base body pot (31) are expediently connected to one another by means of a bayonet closure or a thread.

22. Nozzle arrangement (1) according to one of the preceding claims, characterized in that the inner line (9) arranged within the outer line (3) has a flexible inner line section (11) which is expediently guided by at least one spacer (37) within the outer line (3).

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

24. Nozzle arrangement (1) according to claim 22 or 23, characterized in that the flexible inner line section (11) is under prestress, whereby the first coupling element (39a) is held in the second coupling element (39b).

25. Nozzle arrangement (1) according to one of the preceding claims, characterized in that the inner line (9) arranged within the outer line (3) is coaxially enclosed by the outer line (3).

26. Nozzle arrangement (1) according to one of the preceding claims, characterized in that a connecting piece (5) is connected to the line arrangement (2) on a supply side (4).

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