EP2848316A1 - Rotary nozzle - Google Patents

Abstract

The invention relates to a nozzle which comprises a rotating nozzle main body (1), with a bearing tube (11) and a liquid outlet nozzle (B), a liquid feed (A) and a bearing (4) providing a liquid guide. In this case, the bearing on an outer circumference of the bearing tube (11) is provided and there is a fixed pipe socket (2) which can be inserted into the bearing tube, said pipe socket is designed as a supply of liquid to the nozzle body. The seal takes place between an inner circumference of the bearing tube and an outer circumference of the pipe socket.

Description

The invention relates to a rotating nozzle, in particular for a device for cleaning articles with aggressive cleaning liquids, wherein the nozzle has a nozzle body, with at least one liquid supply and a liquid outlet nozzle.

Such rotating nozzles are known. They are frequently used for devices for cleaning articles with aggressive cleaning fluids, used for example in the food industry for cleaning of pallets, trays, sheets and so on used there.

A device for cleaning with a rotating nozzle is from the earlier application of the applicant DE 199 63 496 A1 known. In the solution presented there, it is such that a nozzle main body is provided on which a nozzle spray pipe is formed or arranged. The nozzle body has a bearing tube, in the interior of which is the storage. The nozzle body is supplied with cleaning fluid through the bearing tube and via a feed, which is designed, for example, as a pipe socket. In the interior of the nozzle main body, a nozzle channel is provided, via which the nozzle spray pipe or the nozzle is supplied with cleaning liquid. Since the nozzle is designed to be rotating, the pipe socket must be sealed to the nozzle body and to the storage to prevent the leakage of the liquid. Furthermore, the nozzle body must be rotatably mounted, so that the desired rotation effect also occurs. For this purpose, it is known in the art that one arranges a seal assembly in the interior of this body, which seals the pipe socket as a liquid supply. This may be, for example, three seals that seal the nozzle body to the outside. Since the ball bearings are also supported in particular on the pipe socket and are arranged in a bearing sleeve, it is possible that in case of leaks due to the selected arrangement, cleaning liquid exits and this is then inevitably led into the bearings. This sensitive bearings, but also high-quality bearings are very quickly damaged so that they are useless in no time. Consequently, one must then shut down the device for cleaning to change both the seals and the bearings. In addition to the downtime for the cleaning device, it is of course also relatively expensive, the ball bearings after a relatively short period of use to replace with new bearings. The bearings, which are inside the nozzle body, namely in the bearing tube, wear out relatively quickly, since they are also constantly subject to wear, as the pipe socket is constantly moving within the seals.

Based on the prior art described above, it is an object of the invention to propose a solution that no longer has the disadvantages described in the prior art and in particular is easy to assemble and inexpensive to manufacture. Particularly desired is the extension of the life of the bearing and the improvement of the sealing effect.

The invention is based on the prior art described above and proposes to achieve the object a rotating nozzle, in particular for a device for cleaning articles with aggressive cleaning liquids, wherein the nozzle has a nozzle body, with at least one liquid supply and a liquid outlet nozzle , wherein the nozzle main body has a bearing tube, which simultaneously forms the liquid supply and the bearing is provided on the outer circumference of the bearing tube and a fixed pipe socket, which is inserted into the bearing tube, wherein the pipe socket is designed as a supply of liquid to the nozzle body and a seal of a Inner circumference of the bearing tube is provided to an outer periphery of the pipe socket. In contrast to the prior art, it is now possible that even with a wear of the sealing rings or the sealing body, the bearings are not exposed to liquid, but rather the escaping liquid can then escape, for example via a connection flange and there provided leakage holes. As a result, it will of course be noticeable to the operators that liquid occurs here and it is caused a change of the seal body or the seals. The ball bearings also remain on exit Liquid against the exiting liquid dense, since they are now arranged on the outer circumference of a bearing tube, which is integrally formed on the nozzle body in contrast to the solutions of the prior art. The liquid is supplied via a pipe socket which can be inserted into the bearing tube. This ensures that the ball bearings for a long time of the interference with cleaning fluid, which is particularly aggressive in the food industry against metals, plastics or the like, free. Also, the cleaning liquids solve any existing lubricant in the ball bearings, so of course, as described in the prior art, the wear is very high and the rotating nozzles known there are characterized by short running time. On the other hand, it is now possible, even with wear of the seals and at a liquid outlet to change the seals without affecting the ball bearings and thus already here to improve the serviceability of the nozzle in question to worry.

As a result of the solution according to the invention, all the problems of the prior art are eliminated. The prior art gaskets were worn too fast, requiring frequent replacement. In addition, the problem was that the bearings have been wetted with cleaning fluid and therefore subject to high wear. Also, these ball bearings had to be changed very often. The solution according to the invention already remedies these problems in the simplest embodiment. This is done solely and solely by the fact that it is possible to provide on the nozzle body a bearing tube on which now the bearings are not within this bearing tube, but outside, that is arranged on the outer circumference of this bearing tube. Thus, the liquid supply and the seal can be done inside this bearing tube. The available sealing surface is increased at the same time. As a result, when the fluid leaks when the seals are worn, the fluid stops can get to the camp, but rather escape to the outside at the end of the bearing tube or at a connection flange provided there, which is why the bearings are completely kept free of the liquid wetting. This makes it possible to use in the food industry, but also in logistics companies cleaning devices virtually no pressure drop in the detergent cycle.

Advantageously, it is provided that the liquid supply takes place via a pipe socket, which can be inserted into the bearing tube and the seal between the inner circumference of the bearing tube and the outer periphery of the pipe socket is provided. This, of course, is the consequence of having now moved the bearings to the outside. Now it is possible to arrange the liquid supply on the inner circumference of the bearing tube via a pipe socket and to provide the seal between the outer circumference of the pipe socket and the inner circumference of the bearing tube. Obtained by this measure much more area for the seal, for example, 30 mm in section seen at a nozzle in question. This is much more than was possible in the prior art. As a result, of course, it will now be possible to provide several seals, of course, in order to better control the sealing problem.

According to the invention it is proposed that the bearing tube provides a liquid guide. These are understood to mean various configurations or this is realized in various ways according to the invention. In a first variant, it is provided that at least part of the inner wall of the bearing tube comes into direct contact with the liquid and thus a liquid guide takes place. However, the subject invention presented here also includes a second variant, in which the bearing tube receives a further element, for example a pipe socket, and thus this additional element in turn the line and leadership of the liquid takes over. The solution proposed here according to the invention thus comprises both an immediate fluid guide through the bearing tube, as well as an indirect fluid guide through the bearing tube.

A skillful development, which is particularly preferred, provides that at least one seal piece is provided as a seal, which seals the gap between the bearing tube and the pipe socket. The seal piece has the advantage that it seals in both directions, namely the bearing tube and the pipe socket, without having to additionally provide seals. Of course you can also provide additional seals either inside or outside of the packer. In the simplest variant, however, it is sufficient if the seal piece itself is formed from a sealing material and is arranged tightly between the bearing tube and pipe socket. In this case, the seal piece has the advantage that it remains replaceable and the sealing axis is provided, so to speak, floating, so of course the wear can also be kept relatively low. However, according to a further advantageous embodiment, it is also possible that the sealing piece is provided so that it has, for example on the outer circumference of an O-ring, which secures the seal piece in the bearing tube against rotation. On the inner circumference, namely in the direction of the pipe socket then the seal takes place on the moving part of the pipe socket or the sealing piece. Another seal piece is then formed exactly the other way round in such a way that on the inner circumference of the seal piece, so facing the pipe socket, an O-ring is arranged, which in turn secures this seal piece against rotation to the pipe stub. The two adjoining packings are designed so that a sliding gap seal is formed or formed by the side surfaces of the packings. This packer then seals the inner circumference of the bearing tube to the pipe socket out. This will be the already mentioned floating Storage of the sealing axis obtained, which of course has an advantageous effect on the life of the seal as a whole. Of course, the use of sealing pieces also has the advantage that here the sealing surface is significantly increased overall compared to the solution of the prior art, where only the sealing rings have sealed, which of course counteracts premature wear. The sliding sealing surface between the individual sealing bodies can also serve to produce the actual seal according to a development.

Accordingly, a development of the invention provides that on the at least one seal piece, a seal on the outer and inner circumference of the sleeve-shaped seal piece is provided. Preferably, of course, the previously mentioned variant is preferred, where at least two seal pieces side by side (seen in the cutting direction) are arranged and a seal, for example in the form of an O-ring on the outer circumference of the first seal piece and a further seal on the inner circumference of the seal piece is provided.

As already mentioned, it is particularly preferred to provide a plurality of sealing pieces, preferably five to six sealing pieces, each having alternately an outer and an inner seal arranged. This seal can serve both the seal, but also in particular the setting of the seal piece on the respective side, ie facing the bearing tube or the pipe socket.

As already mentioned, it is of particular advantage if the sealing piece is made of a sealing material, such as carbon, ceramic, plastic or metal, such as brass, bronze, carbide or the like. This gives excellent sealing properties already by the packer itself and a long life of it formed seal. It is now possible according to the invention, to select the appropriate material for the sealing piece for the particular application. For example, it is possible to use sealing materials made of silicon dioxide or similar high-grade materials for abrasive media.

A development of the previously described embodiment proposes that a plurality of sealing pieces are provided and the sealing pieces are formed of different materials. Of course, the provision of different sealing materials offers the advantage that one here on the one hand quite well-sealing material, which is possibly a little softer and therefore faster wears alternately with somewhat harder materials provides to maintain the life of the seal in particular. The pipe socket or the bearing tube will initially be supported on the slightly harder materials and thus prevent the wear of the slightly softer material. This also makes it possible to significantly increase the life of the particular in question sealants and the seal.

As already mentioned, it is provided according to the invention, in addition to arrange a seal on the seal piece. With a development of the invention, this may, as already mentioned, be an O-ring. However, it is also possible to provide a flat gasket, a lip seal or a similarly formed seal of liquid-resistant material, such as rubber, rubber or flexible plastic.

The invention proposes that at least one, preferably two or more ball bearings are provided as the bearing, which are arranged on the outer circumference of the bearing tube. The advantages to be achieved according to the invention have already been mentioned in detail and occur in the described embodiment in the same way. A particular advantage is thereby indicated that larger ball bearings can be used than in the prior art, since now no longer the entire ball bearing cross section must be mapped against the full pressure of the detergent.

Of advantage, it is natural that the storage next to the or the ball bearings has a bearing housing which engages on the nozzle body facing side in a groove provided there corresponding with slight play. The advantages of such a configuration are obvious. Thus, the camp is also protected from the outside against any impinging spray, which, for example, as an atomized liquid course in the cleaning chamber of the cleaning device, in which the rotating nozzle is usually arranged, occurs. The corresponding groove in the nozzle body is cleverly chosen so that there is a certain paragraph, through which also no liquid can enter. The game is of course necessary so that the nozzle body can rotate relative to the bearing housing. Due to the construction arrangement of the rotating nozzle body, any penetrating cleaning agent is expelled from the rotating nozzle body by the centrifugal force through the groove.

It is advantageous according to a development of the previously described variant of the invention, when the bearing housing serves as a lining for the ball bearings and preferably has a splash guard, which is provided on the nozzle body facing side and / or on both sides of the bearing or a gasket is provided. Thus, the splash guard or moisture protection for the ball bearings is further increased, so that the risk that any cleaning fluid enters the ball bearings, is almost impossible.

It is further provided that a cover flange is provided on the pipe socket, on which a engaging in the bearing housing Approach is provided, which serves as a further splash guard for or the ball bearings. This now secures the side that faces away from the nozzle body. Now, the splash guard for the ball bearings is complete and it can not penetrate any moisture or cleaning liquid there.

On the inside of the cover flange or on the side facing the nozzle main body, a collecting chamber is provided in the interior of the cover flange. This serves for the collection of possibly exiting detergent or cleaning fluid. This collecting chamber has, as already mentioned briefly above, an outlet opening, from which then passes the exiting cleaning liquid into the open. This indicates to the operator or operators that there is now a leak at the seal. It will therefore be relatively short term maintenance can be initiated without large fluid losses occur. Again, this is a further improvement over the prior art solutions.

Of course, it is also provided according to the invention that has a connection interface for connection to a liquid-carrying line of the device for cleaning on the Abdeckflansch on the side facing away from the nozzle in the installed state. The nozzle is then connected to a liquid-carrying supply line for the cleaning liquid via this connection interface. The fact that the connection interface is firmly connected to the connection flange, of course, the bearing housing and the cover flange remains during the movement of the nozzle stand. That is, there is no relative movement of the cover flange relative to the connection interface or the liquid-carrying supply line. Rather, only the nozzle body moves with the nozzle tube. An additional advantage that occurs through this configuration is that due to the fact that the cover flange with the outlet openings of the The collecting chamber is not moved, the operator is very easily possible, even with the smallest leakage quantities of liquid, to recognize this immediately and to initiate the necessary repairs. It is furthermore advantageous if at least one nozzle tube is arranged on the nozzle main body as a liquid outlet nozzle. With this nozzle tube, the liquid jet can be very accurately directed to the good to be cleaned. In particular, it is thus possible to realize different angles of attack, in the event that different objects are to be cleaned.

The invention also relates to a rotating nozzle for a device for cleaning articles with aggressive cleaning liquids, wherein the nozzle has a nozzle body on which a bearing tube is arranged liquid-tight or formed on the outer circumference of the bearing tube storage in the form of at least one surrounding a ball bearing Bearing housing is provided, which engages in a circumferential groove on the nozzle body, in particular with light play or non-contact, wherein the liquid supply via a pipe socket, which is inserted into the bearing tube and the seal between the inner circumference of the bearing tube and the outer circumference of the pipe socket in the form at least a seal piece is provided. This is the preferred embodiment of the invention. However, the invention is not to be understood as limiting only to this embodiment. Rather, all variants described above can be implemented individually or in combination with one another in a wide variety of variants.

In a preferred embodiment of the proposal, it is provided that the rotating nozzle main body has on its end face a maintenance opening which can be closed by a removable closure. The maintenance opening is preferably arranged coaxially to the axis of rotation of the nozzle. Preferably, the Closure formed as a hollow screw, consisting of a sleeve tube section and a cap portion.

Furthermore, it is provided that the maintenance opening has a larger diameter than the inner opening of the bearing tube and the inner opening of the bearing tube is in communication with the maintenance opening.

The inner opening of the bearing tube should be accessible through the maintenance opening for the reason that the sealing pieces can be removed and replaced. For this it is favorable to provide no undercuts in the inner opening. Alternatively, it is possible to arrange undercuts so that their bright inner dimension is still large enough not to hinder the expansion of the seal. It is also possible that an undercut, so a protruding edge or ring, is provided, and the assembly or disassembly is carried out on the axially opposite to the closure region of the bearing tube. The seals are replaced as follows: Unscrew the cover flange, take off the pipe socket, remove the plug (screw) and push out the seals from the side of the plug in the direction of the pipe socket / cover flange. The pushing out of the seal, as described, has the advantage that the inner surface of the bearing tube is not damaged.

In an advantageous embodiment, it is provided that the sealing pieces can be removed and replaced by the maintenance opening without the rotating base body having to be dismantled. Advantageously, the seals can be equipped in a variant with an element which cooperates with a puller and thus allows withdrawal of the seals from the annular gap.

Clever way is provided that the at least one sealing piece held by a compression spring in the axial direction in position and that the compression spring is biased by the closure against the sealing pieces. The spring is formed, for example, as a plate spring, an elastomer or the like. The use of a spring offers in particular higher pressures (of the cleaning liquid) and / or for liquids with abrasive components advantages. The spring pushes the seals together permanently, so that no leakage gap arises. If seal parts wear in the axial direction, the spring travel is no longer sufficient at some point. Then new gaskets can be inserted through the screw plug.

In a further preferred embodiment, it is provided that the liquid flowing through the nozzle flows through one or more radial bores in the wall of the closure designed as a hollow element.

Furthermore, it is advantageously provided that one or more sliding disks are provided in the axial direction between the sealing pieces and the sliding disks are in particular made of carbon, ceramic, plastic or metal, such as brass, bronze, hard metal or the like. The use of the sliding disks proposed here, it being possible for example to provide one, two or more sliding disks, additionally enables cost-effective sealing between the plane surfaces of the inside and outside sealing elements. The material selection of the sliding discs is very variable, the material selection is carried out in coordination with the respective application of the nozzle.

Advantageously, it is provided that the cover flange is screwed by a thread to the bearing housing and thereby the or the bearing is braced in the bearing housing / are. It is provided that the thread is provided on the outer circumference or on the inner circumference of the cover flange.

The invention also relates to a device for cleaning objects, such as pallets, trays, sheets in the food industry, with aggressive cleaning liquids with at least one nozzle according to one of the preceding embodiments or variants. Such a device is characterized by the advantages of the nozzle, which naturally occur in the device in the same way. The device is characterized by a long service life, in particular the disruption times or downtimes are significantly reduced by leaks at the nozzle or nozzles.

The invention also includes the use of such a nozzle with aggressive and / or abrasive rinsing and / or cleaning liquids.

Fig. 1

Schnittdarstellung einer erfindungsgemäßen Düse im montierten Zustand,

Fig. 2

Schnitt durch einen Düsengrundkörper nach der Erfindung und Fig. 1,

Fig. 3

Schnitt durch einen Rohrstutzen nach der Erfindung und Fig. 1,

Fig. 4

Schnitt durch ein Lagergehäuse nach der Erfindung und Fig. 1,

Fig. 5

Schnitt durch verschiedene Dichtkörper nach der Erfindung und Fig. 1,

Fig. 6

Schnitt durch einen Abdeckflansch nach der Erfindung und Fig. 1,

Fig. 7

Schnitt durch eine Düse nach dem Stand der Technik und

Fig. 8

Schnitt durch eine Düse in einer weiteren Ausführungsform mit Wartungsöffnung gemäß der Erfindung.

In the drawing, the invention is shown schematically, in particular in a use example. Show it:

Fig. 1

Sectional view of a nozzle according to the invention in the assembled state,

Fig. 2

Section through a nozzle body according to the invention and Fig. 1 .

Fig. 3

Section through a pipe socket according to the invention and Fig. 1 .

Fig. 4

Section through a bearing housing according to the invention and Fig. 1 .

Fig. 5

Section through various sealing bodies according to the invention and Fig. 1 .

Fig. 6

Section through a cover flange according to the invention and Fig. 1 .

Fig. 7

Section through a nozzle according to the prior art and

Fig. 8

Section through a nozzle in a further embodiment with maintenance opening according to the invention.

In the figures, the same or corresponding elements are denoted by the same reference numerals and therefore, if not appropriate, will not be described again.

In the Fig. 1 is a sectional view of a nozzle I according to the invention shown in the fully assembled state. This is a sectional view. The nozzle I is schematically indicated by an arrow, since this means the entire nozzle. With the arrow A, the liquid supply for the cleaning liquid is shown in the nozzle I. The arrow B denotes the liquid outlet nozzle. At the nozzle body 1, a bearing tube 11 is formed. This ensures a liquid-tight seal towards the outside to the liquid supply A. In contrast to the solutions of the prior art, the bearing L is now provided on the outer circumference of the bearing tube 11. Here, for example bearings 4 are arranged as ball bearings, which are surrounded by a bearing housing 5. The bearing housing 5 engages in a groove 12 provided on the nozzle body groove. Thus, an overlap is achieved and it is no longer possible that escaping cleaning fluid from this side gets into the storage L. In the interior of the Lagerrohes 11 a pipe socket 2 is inserted and connected by the connecting means 25, such as a screw, stable. This carries on the outer circumference, that is, on the inner circumference of the bearing tube 11 side facing in the embodiment, five packings 3, 3/1, 3/2, 3/3, 3/4, 3/5. They are located in a gap 13 between the bearing tube 11 and pipe socket 2. These gaskets 3/1, 3/2, 3/3, 3/4, 3/5 dense the nozzle I and the nozzle body 1 to the outside against leaking liquid , In contrast to the prior art, while the seal assembly is so inside the bearing tube or the nozzle body 1 that any leaking cleaning fluid can not get into the bearings 4 in case of damage to the seals. This is additionally ensured by the bearing housing 5, which is sealed at the direction away from the nozzle body 1 side by means of a cover 21, which in turn is sealed against leakage of fluid to the pipe socket 2 through a seal 32 and the bearing housing 5 against entering in particular with its outer circumference Liquid seals. For an overall dense connection is ensured, which ensures both the tightness with respect to the bearing tube 11 but also with respect to the pipe socket 2. In the Fig. 4 It is clear that on the nozzle body 1 side facing a splash guard seal 51 is still provided. This is in Fig. 1 not apparent. Also not apparent is the concrete structural design of the Abdeckflansches 21, in the description of the Fig. 6 will be discussed in more detail. On the output side of the nozzle body 1, that is to say in the direction of the liquid outlet nozzle B, a nozzle tube 6 is arranged. This can of course be angled depending on the purpose according to an optimal angle of the impact of the cleaning liquid on the to ensure cleansing good. On the opposite side a guide blade 7 is provided, which ensures optimum guidance of the nozzle and in particular exerts a certain pressure equalization, resulting from the recoil of the exiting cleaning liquid, on the opposite side, namely on the nozzle tube 6. The reference numeral 31 denotes a O-ring seal, which has both a sealing effect, but also at the same time the seal piece 3/1, 3/2, 3/3, 3/4, 3/5 against rotation on the respective side arranged to the bearing tube 11 and the pipe socket 2 guaranteed. In case of wear of the sealing piece 3/1, 3/2, 3/3, 3/4, 3/5, of course, a sealing effect also occurs through this O-ring in addition. The seal pieces 3/1, 3/2, 3/3, 3/4, 3/5, as already described above, even have a sealing effect. By arranging the seal pieces side by side a sufficiently wide sealing surface is ensured. In addition, a "floating storage" and the pipe socket 2 is ensured in the bearing tube 11, whereby a "floating seal" is formed. The individual seal pieces 3/1, 3/2, 3/3, 3/4, 3/5 are sealed against each other with their side surfaces also in the form of a so-called sliding gap seal, so that no liquid can escape here, which would possibly increase the wear.

The Fig. 2 now shows an individual representation of the nozzle body according to the invention. All references were already in the description of the Fig. 1 presented. These are expressly referred to.

The Fig. 3 shows the pipe socket 2 according to the invention. This will, as from the Fig. 1 seen inserted in the assembled state in the bearing tube 11 of the nozzle body 1. At the right side in the representation of the cover flange 21 is then mounted. The Fig. 4 shows a section through the bearing housing 5, which is part of the storage L. The reference numeral 51 denotes a splash guard, which secures the bearing 4, not shown here before entering spray water from the nozzle body facing side. The bearing 4 is preferably a ball bearing.

The Fig. 5 shows in each case a section through different sealing pieces 3/1, 3/2, 3/3, 3/4, 3/5 according to the invention. With an arrow indicated schematically, the reference numeral 3 was chosen to generally designate the packings. These can, as already described, be formed of different materials. The seal piece 3/1 has a small groove on the outer circumference, which serves to receive a seal, for example an O-ring. This serves on the one hand the determination of the seal piece 3/1 on the outside, on the other hand, but also the same time the seal. Furthermore, the side surfaces of the seal piece 3/1, but also the other seal pieces 3/2, 3/3, 3/4, 3/5 are formed so that they seal against each other and form a sliding gap seal. The seal piece 3/2 has the groove on the inside or on the inner circumference of the seal piece 3/2. Again, it is possible, and as in Fig. 1 shown to insert a sealing ring in the form of an O-ring or other seal. Otherwise, the embodiment is analogous to the sealing piece 3/1. Of course, it is also possible according to the invention to use a seal piece 3/3, which carries no additional seal at all. As can be seen, it is now easily possible to provide a pack wear set. This is easily replaceable, which of course has a very positive effect on the maintenance costs of a device.

The Fig. 6 shows the cover flange 21, which has a connection interface 24. About this connection interface 24, the nozzle is a total of the liquid supply A, for example in Form of a liquid supply line, not shown, ensures the cleaning device. A projection 22 is formed so that it can engage a corresponding groove of the bearing housing 5. Furthermore, a collecting chamber 23 is shown, which is designed so that, on the one hand, liquid emerging from the seal can enter this collecting chamber 23, but in such a way that penetration into the bearing housing 5 or into the bearings 4 is not possible. For this purpose, the collecting chamber 23 has at least one outlet opening 26 (see, eg Fig. 1 or 8th ) for the escape of leaking cleaning fluid from the seal. This signals to the outside of the operator that the seals are worn and they must be replaced. This ensures a timely replacement of the seal pieces 3/1, 3/2, 3/3, 3/4, 3/5. The pipe socket 2 is partially inserted into the cover 21 and secured against rotation by means of a countersunk screw unspecified.

The Fig. 7 now shows a nozzle as used in the prior art. The reference numerals have been selected analogously to the embodiment according to the invention. As can be seen, here the bearing 4 is arranged on the pipe socket 2 and within the bearing tube 11, wherein the bearing tube 11 is disposed on the nozzle body 1, but so that liquid, if it exits from the seals 31 and the resulting spaces, through the Camp 4 flows. Thus, the previously described negative effects are effected, after which the bearings wear 4 very quickly when exiting cleaning fluid. All other reference numerals correspond to those already presented, so that will not be discussed again explicitly.

Fig. 8 shows one opposite Fig. 1 modified further embodiment of the nozzle according to the invention. The embodiment described here is particularly optimized in terms of ease of maintenance when removing and replacing the sealing elements. Same or corresponding elements have the same reference numerals as here Fig. 1 ,

On the front side of the rotating nozzle main body now a maintenance opening 14 is provided coaxially to the axis of rotation R. This maintenance opening 14 is closed and sealed at the end during normal operation of the nozzle by the closure 15 against liquid leakage. In the embodiment shown, the closure 15 is designed as a hollow screw, which is screwed tightly via a thread with the maintenance opening 14. By removing the shutter 15, the nozzle is made accessible from the front of the rotating body for maintenance.

Between the closure 15 and the sealing pieces 3 here along the axis of rotation R effective spring 17 is provided. This spring 17 presses the sealing pieces 3 in the axial direction against each other, thus preventing a Wegwandern of the sealing pieces during the rotation of the nozzle and ensures that no leakage gap between the sealing pieces 3 may arise. The spring 17 is biased by the end of the closure 15, which faces away from the end face of the rotating body. When using the nozzle in combination with detergents with abrasive components, there is an increased wear of the sealing pieces 3, especially in the axial direction. The spring 17 then ensures, by means of the bias introduced by the closure 15, that the sealing pieces 3 are compressed in the axial direction without a leakage gap, in spite of the loss of length resulting from the axial wear. In the Fig. 8 Of course, spring 17 shown as a helical spring may also be formed by another resilient element, such as a cup spring or a spring element made of an elastomer.

To optimize the seal in the axial direction additional sliding disks 33 are provided between the sealing pieces 3 in the embodiment shown here. These sliding disks 33 are between a sealing piece which seals against the pipe socket 2 and a sealing piece which is sealed against the inner opening 16 of the bearing tube 11. The sliding discs 33 can be made of various materials such as carbon, ceramic, plastic or metal.

The flow of the cleaning liquid through the closure 15, which is designed in the present representation as a hollow screw, is carried out by one or more radial bores 18 in the closure 15th

The bearings 4 are protected in the present embodiment by additional sealing discs 41 against splashing water during operation of the nozzle. These sealing disks 41 are provided both on the side facing the rotating base body and on the side facing the covering flange 21.

The cover flange 21 is in the in Fig. 8 illustrated embodiment screwed via the thread 52 directly to the bearing housing 5. The thread 52 is provided on an outer periphery of the cover flange 21 and on an inner periphery of the bearing housing 5, respectively. Thus, no further fasteners are required and the cover 21 can be removed by simple rotation of the bearing housing 5 or mounted on the bearing housing 5. By this rotational movement, the bias of the bearing 4 is adjusted relative to the bearing housing 5 at the same time.

For a replacement of the sealing pieces 3 or the sliding disks 33, the cover flange 21 is first unscrewed from the bearing housing 5. In this case, the pipe socket 2 is pulled out of the sealing pieces 3 and sliding discs 33. To remove the old sealing elements is now the maintenance opening 14 by removing the shutter 15 is opened. Through this approach, the old sealing elements can now simply slide out of the bearing tube 11 to the opposite side of the maintenance opening 14. By this pushing out of one to the other side of the bearing tube 11 ensures that the sealing surface on the inside of the bearing tube 11 is not damaged.

In a further variant, it is provided that those sealing pieces 3, the seals seal 31 against the rotating bearing tube 11, are positively connected in the circumferential direction with the fixed pipe socket 2 and / or those sealing pieces 3 whose seals against the stationary pipe socket 2 dense in the circumferential direction with positive are connected to the rotating bearing tube 11.

In one embodiment of the nozzle according to the invention there is a positive connection between the sealing pieces 3 and the element which carries these sealing pieces 3. The sealing pieces 3, the seals 31, executed, for example, as O-rings, movable against the rotating bearing tube 11 seal are connected in the circumferential direction against rotation with the pipe socket 2. This ensures that the movement always takes place between the actual seal 31 and the associated sealing surface. When using certain cleaning liquids, it may happen that the seals 31 stick to their sealing surface. In this case, the bonding could be so strong that the movement no longer takes place between seal 31 and sealing surface, but on the other side of the sealing piece 3, where it is fixed on its base. In this case, a sealing effect would no longer be correct. The positive connection between the sealing pieces 3 and the element which carries it, here enforces a movement and, if necessary, a tearing of a possible bond between seal 31 and sealing surface.

Of course, a positive connection for the other combination is provided. The sealing pieces 3 whose seals 31 seal against the surface of the pipe socket 2 are then connected in a form-fitting and torsion-proof manner to the inner surface of the bearing tube 11. A positive bond is e.g. achieved by a tongue and groove connection.

The claims now filed with the application and later are without prejudice to the attainment of further protection.

If, on closer examination, in particular also of the relevant prior art, it appears that one or the other feature is beneficial for the purpose of the invention, but not crucial, it is of course already desired to have a formulation which is such a feature , in particular in the main claim, no longer having. Such a sub-combination is also covered by the disclosure of this application.

It should further be noted that the embodiments and variants of the invention described in the various embodiments and shown in the figures can be combined with one another as desired. Here, one or more features are arbitrarily interchangeable. These feature combinations are also disclosed with.

The references cited in the dependent claims indicate the further development of the subject matter of the main claim by the features of the respective subclaim. However, these are not to be understood as a waiver of obtaining independent, objective protection for the features of the dependent claims.

Features which have been disclosed only in the description or also individual features from claims which comprise a plurality of features can at any time be taken over as being of essential importance for the purpose of differentiation from the prior art in the independent claim (s), even then, if such features have been mentioned in connection with other features or achieve particularly favorable results in connection with other features.

Claims (15)

Comprising nozzle - A rotating nozzle body (1), with a fluid guide is provided Lagerrohr (11) and a liquid outlet nozzle (B) a liquid supply (A), - and a storage (L), wherein the bearing (L) is provided on an outer periphery of the bearing tube (11)
marked by
a fixed pipe socket (2) which is inserted into the bearing tube (11), wherein the pipe socket (2) is designed as a supply for liquid to the nozzle body and a seal of an inner periphery of the bearing tube to an outer periphery of the pipe socket (2) is provided. Nozzle according to Claim 1, characterized in that at least one sealing piece (3) is provided as the seal, which seals the intermediate space (13) between bearing tube (11) and pipe socket (2). Nozzle according to one of the preceding claims, characterized in that on the at least one sealing piece (3) at least one seal (31) is provided on the outer and inner circumference of the sleeve-shaped sealing piece and / or a plurality of sealing pieces (3), preferably six sealing pieces , are provided, each having alternately an outer and an inner seal (31). Nozzle according to claim 5, characterized in that a plurality of sealing pieces (3, 3/1, 3/2, 3/3, 3/4, 3/5) are provided and the sealing pieces (3, 3/1, 3/2, 3/3, 3/4, 3/5) are formed from different sealing materials. Nozzle according to one of the preceding claims, characterized in that as bearing (L) at least one, preferably two or more bearings (4) are provided, which are arranged on the outer circumference of the bearing tube (11) and / or the storage (L) next the bearing (s) (4) (4) has a bearing housing (5) which engages on the side facing the nozzle base body (1) correspondingly, in particular without contact, in a groove (12) provided there. Nozzle according to one of the preceding claims, characterized in that the bearing housing (5) serves as a lining for the bearings (4), for example ball bearings, and preferably has a splash guard seal (51) which is provided on the side facing the nozzle body (1) and / or on both sides of the bearing or bearings (4) a sealing washer (41) is provided. Nozzle according to one of the preceding claims, characterized in that a covering flange (21) is provided on the pipe socket (2), on which a projection (22) engaging in the bearing housing (5) is provided, which serves as a further splash guard for the one or more Bearing (4) is used. Nozzle according to one of the preceding claims, characterized in that in the cover flange (21) a collecting chamber (23) for optionally exiting cleaning liquid is provided and the collecting chamber (23) has at least one outlet opening (26) and / or on the cover on the in Installed state of pointing away from the nozzle (I) has a connection interface (24) for connection to a liquid-carrying line of the device for cleaning. Nozzle according to one of the preceding claims, characterized in that the rotating nozzle main body (1) has on its front side a maintenance opening (14) which can be closed by a removable closure (15). Nozzle according to one of the preceding claims, characterized in that the maintenance opening (14) has a larger diameter than the inner opening (16) of the bearing tube (11) and the inner opening (16) of the bearing tube (11) with the maintenance opening (14) in connection and / or the liquid flowing through the nozzle flows through one or more radial bores (18) in the wall of the closure (15) designed as a hollow element. Nozzle according to one of the preceding claims, characterized in that the sealing pieces (3) through the Maintenance opening (14) can be removed or replaced without the rotating body (1) must be dismantled and / or the at least one sealing piece (3) by a compression spring (17) held in position in the axial direction and that the compression spring from the closure ( 15) is biased against the sealing pieces (3). Nozzle according to one of the preceding claims, characterized in that in the axial direction between the sealing pieces (3) one or more sliding discs (33) are provided and / or those sealing pieces (3), the seals (31) against the rotating bearing tube (11) Dense, in the circumferential direction positively connected to the fixed pipe socket (2) are connected and / or those sealing pieces (3) whose seals against the stationary pipe socket (2) dense in the circumferential direction are positively connected to the rotating bearing tube (11). Nozzle according to one of the preceding claims, characterized in that the cover flange (21) is screwed by a thread (52) to the bearing housing (5) and in particular the bearing or bearings (4) in the bearing housing (5) are braced. Nozzle for a device for cleaning articles with aggressive cleaning liquids, in particular according to one of the preceding claims, in which the nozzle (I) has a rotating nozzle base body (1) on which a bearing tube (11) is arranged or formed liquid-tight on the outer circumference the bearing tube (11) the bearing (L) in the form of at least one bearing (4) surrounding the bearing housing (5) is provided which engages in a circumferential groove (12) on the nozzle body (1) without contact, wherein the liquid supply (A) via one Pipe socket (2) takes place, which in the bearing tube (11) can be inserted and the seal between the inner circumference of the bearing tube (11) and the outer circumference of the pipe socket (2) in the form of at least one seal piece (3) is provided. Device for cleaning objects, such as pallets, trays, sheets in the food industry, with aggressive cleaning liquids having at least one nozzle (I) according to one of the preceding claims.

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