DE202016102216U1 - Nozzle with sliding gap seal - Google Patents

Abstract

A nozzle comprising - a rotating nozzle main body (1), with a liquid guide providing Lagerrohr (11) and a liquid outlet nozzle (B) - a liquid supply (A), - and a storage (L), wherein the storage (L) on a Outer circumference of the bearing tube (11) is provided - 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 (1) and a seal of an inner periphery of the Bearing tube is provided to an outer periphery of the pipe socket (2), characterized in that at least one designed as a hollow cylinder seal piece (3) in the bearing tube (11) is arranged and the seal piece (3) liquid-tight to the inner circumference of the bearing tube (11) in the bearing tube ( 11) can be introduced and to seal the rotating Düsengrundköpers (1) to the fixed pipe socket (2) a sliding gap (34) between en a side surface (35) of the sealing piece (3) and an end face (28) of the pipe socket (2) is provided.

Description

The invention relates to a rotating nozzle comprising a rotating nozzle body with a fluid guide available storage tube and a liquid outlet nozzle. Furthermore, the nozzle of a liquid supply and a storage, wherein the bearing (L) is provided on an 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. Furthermore, a seal of an inner circumference of the bearing tube is provided to an outer periphery of the pipe socket.

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

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 to replace the ball bearings after a relatively short period of use by 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.

Another technical solution disclosed EP 2 848 316 A1 , In the solution proposed therein, a seal of the nozzle between an inner circumference of a rotating tube and the outer periphery of a fixed pipe socket takes place. For sealing a plurality of sealing pieces are used, which seal against a rotating member and to some other part against a fixed element, wherein a plurality of sliding gaps are provided in the axial direction between the individual sealing pieces. Sealing effect and wear resistance are already significantly improved in this solution. A disadvantage is the high assembly costs, which is due to a variety of items.

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 simple and easy to assemble. The object of the invention is achieved by a nozzle, comprising a rotating nozzle body, with a liquid guide Stellstellendem Lagerrohr and a liquid outlet nozzle of a liquid supply and storage, wherein the storage is provided on an outer periphery of the bearing tube, a fixed pipe socket, in the Storage tube is inserted, wherein the pipe socket is designed as a supply for liquid to the nozzle body and a seal of an inner periphery of the bearing tube is provided to an outer periphery of the pipe socket, wherein at least one designed as a hollow cylinder seal piece is arranged in the bearing tube and the seal piece liquid-tight to the inner circumference of the bearing tube in the bearing tube can be introduced and to seal the rotating Düsengrundköpers the fixed pipe socket a sliding gap between a side surface of the seal piece and an end face of the Roh is intended.

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. This will of course make it obvious to the operators that Here liquid occurs and it causes a change of the seal body or the seals. The ball bearings remain tight even when liquid emerges from the exiting liquid because, in contrast to the solutions of the prior art, they are now arranged on the outer circumference of a bearing tube, which is formed on the nozzle main body. 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. Consequently, in the case of a leak in the case of worn seals, the liquid can no longer reach the bearings, but rather escape to the outside at the end of the bearing tube or at a connection flange provided there, for which reason the bearings are kept completely 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.

The seal is made according to the invention between the inner circumference of a rotating bearing tube and an outer periphery of a fixed pipe socket. For sealing a sealing piece is additionally provided, which has the shape of a hollow cylinder and which is inserted into the bearing tube. The seal piece is designed so that it is liquid-tight to the inner circumference of the bearing tube. The seal piece is constructed rotationally symmetrical and the axes of symmetry of the seal piece and the bearing tube are substantially identical in the mounted state. The seal piece rotates during operation of the nozzle together with the nozzle body. A side surface of the sealing piece is in close proximity to an end face of the fixed pipe socket and forms with this end face a sliding gap.

This sliding gap is so narrow that no or very little liquid from the interior of the rotating nozzle body through the sliding gap, past the end face of the pipe socket, can escape to the outside. At the same time the sliding mating between the side surface of the gasket and the end face of the pipe socket is lubricated by a very thin liquid film. As a result, the wear of these two surfaces is significantly reduced. In contrast to the prior art, a seal between a single sealing element and the pipe socket takes place directly in the inventive solution. As a result, the number of components for a nozzle according to the invention is significantly reduced. This also significantly reduces the installation and maintenance costs. Due to the fact that in the solution according to the invention is sealed directly on an end face of the pipe socket remains at constant outer geometry of the nozzle more flow area for the medium flowing through the nozzle, as in the solution with multiple sealing pieces between the outer circumference of the pipe socket and the inner circumference of the Lagerrohres is the case. By simplifying the construction, the flow rate of liquid through the nozzle according to the invention is significantly increased at the same time with the same external dimensions. As a result of the thus produced lower flow resistance of a nozzle according to the invention, the liquid leaves the nozzle at a higher pressure compared with the prior art. Due to this higher pressure, an improved cleaning performance of the nozzle is achieved.

In a preferred embodiment of the proposal, it is provided that a fixed cover flange is provided, which is releasably connectable to a likewise fixed bearing housing and the pipe socket is formed on the cover flange and pipe socket and cover flange form a common component. In this embodiment, the pipe socket having the sealing surface is formed directly on a cover flange and forms with it a single component. The cover flange can be detachably connected to the bearing housing at the same time. This can be done for example via a screw connection. An advantage of this design is that the number of components for a nozzle through the component combination of Pipe socket and cover flange is further reduced. In addition, the one-piece design saves a sealing surface between cover flange and pipe socket, which further increases the reliability of the nozzle.

Clever manner is provided that in the axial direction of the end face of the pipe socket then a mounting collar is provided, whose outer diameter is smaller than the inner diameter of the sealing element designed as a hollow cylinder. In this embodiment, a mounting collar is provided on the directed in the direction of the rotating nozzle main body side of the pipe socket, which penetrates with its smaller outer diameter in the larger inner diameter of the sealing element. This mounting collar is useful to assemble the nozzle. The seal piece is placed on the mounting collar during assembly and then inserted together with the pipe socket in the bearing tube. Falling out of the seal piece or incorrect positioning of the packer in the assembled state is thereby prevented.

Another embodiment is designed such that the mounting collar in the mounted state of the nozzle in the axial direction in the sealing element. As a result, the flow resistance through the nozzle is further improved, the risk of turbulence on the sealing surface between the seal piece and pipe socket is reduced by the mounting collar. At the same time, the assembly collar also receives the seal piece in position when mounted.

Conveniently, it is provided that the sealing element is made of hard metal or ceramic and are provided on its outwardly directed towards the bearing tube surface at least two sealing rings made of an elastic material. In this embodiment, a favorable sliding pair between the seal piece and fixed pipe socket is produced by selecting carbide or ceramic as the material for the seal piece. These materials have an improved wear behavior, especially as sliding partners to iron materials. The sliding pairing between two identical or similar ferrous materials has shown that small and very small welds between the sliding partners can lead to greatly increased wear. This problem no longer occurs with partners made of carbide or ceramic compared to ferrous materials. It has also proven to be favorable to arrange at least two sealing rings on the outer circumference of the sealing piece. By providing two sealing rings tilting of the axes of symmetry of the seal piece and the bearing tube to each other is prevented. As a material for the sealing rings, elastic materials such as rubber, thermoplastics, EPDM or Teflon have proven. Particularly favorable is the use of commercially available O-rings as sealing rings.

In a further embodiment of the proposal, it is provided that the pipe socket and the cover flange consist of an iron-based material. This means advantages in the sliding against the packer, as already described above. In addition, iron-based materials are suitable materials for a component having a plurality of functional surfaces, since they can be very well machined, for example, rotated.

Cleverly it is provided that the bearing of the rotating nozzle body is disposed between an outer periphery of the bearing tube and the fixed bearing housing. The bearing housing thus accommodates the outer rings of the bearing, whereas the inner rings of the bearing are located on the outer surface of the bearing tube. Advantageously, a releasable connection of the bearing housing to the cover flange already described.

In a further embodiment it is provided that the bearing is designed as a roller bearing and comprises at least two bearings. Rolling bearings are characterized by a high load capacity and good wear behavior. Of course, more than two bearings for the storage of a nozzle or plain bearing werden.In a preferred embodiment of the proposal is provided that the bearings are designed as angular contact ball bearings or tapered roller bearings, wherein the axial load-receiving direction of the bearing parallel to the cover in the direction of the rotating Directed nozzle body, is oriented by the fluid pressure generated inside the nozzle Abdrückkraft. In this embodiment, bearings are provided which can absorb high forces in the axial direction. Such axial forces arise during operation of the nozzle due to the sometimes high fluid pressure in the interior. This pressure creates a force on the rotating nozzle body which acts away from the stationary pipe socket. Due to the pressure force there is a risk that the rotating nozzle body is pressed off from the stationary part of the nozzle. The angular contact ball bearings or tapered roller bearings are therefore installed so that they can absorb the described Abdrückkräfte on the rotating part of the nozzle in the axial direction. For multiple bearings, the axial load bearing directions of the bearings can all be aligned parallel and against the push-off force. Alternatively, a conventional storage with two counteracting axial load bearing directions for the built-in bearings is possible.

Advantageously, it is provided that the bearings made of ceramic, glass or plastic. The choice of such a chemically very stable material for the bearings further increases the durability of storage. Especially in nozzles in which aggressive cleaning agents are used, inert bearing materials are particularly favorable for a long life and service life of the bearing. Ceramics have the advantage of being corrosion-resistant against almost all media and at the same time have very good wear resistance. The same applies to bearings that consist entirely or partly of glass. Some plastics are also neutral towards aggressive media. Of course, bearing pairs of different materials, such as ceramic with plastic or glass with plastic with belonging to the invention.

Although the seal piece is fixed by the elastic sealing rings sufficiently well in position and secured against displacement in the axial direction in a further preferred embodiment of the invention, it is provided that the seal piece in the interior of the bearing tube by a positioning element, such as a spring or the like axially is positionable.

In order to ensure a minimum but sufficient for the purposes of the invention sliding gap, in one possible embodiment of the invention, a spring can be inserted in front of the packer. This can prevent migration of the seal piece. Alternatively or additionally, by suitable choice of the diameter, the hardness and the material of the sealing rings on the seal piece, a sufficient sealing and reduction of the shift tendency can be achieved.

In cases where due to abrasive media wear of a counterpart to the packer is to be expected, on the o.g. Spring of the sliding gap by the tuned spring-fixing force of the seal or the sealing counterpart and the predetermined contact pressure are kept small as required.

For an embodiment of a nozzle, 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 assumes the direction and guidance of the liquid. 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 at least one 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. Thus, the already mentioned floating bearing of the sealing axis is 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 outside and on Inner circumference of the sleeve-shaped sealing 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 the seal thus formed. 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 given by the fact 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 Abdeckflansch is provided on the pipe socket, on which an engaging into the bearing housing approach is provided, which serves as a further splash guard for the or the ball bearings. This now secures the side that faces away from the nozzle body. Now the splash guard for the ball bearings completely and it can penetrate no moisture or cleaning liquid there at all.

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 does not move with the outlet openings of the collecting chamber, it is very easily possible for the operator, even at the smallest discharge quantities of liquid, to recognize this immediately and to carry out the necessary repairs initiate. 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 is 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 so a withdrawal of the seals from the annular gap allowed.

Clever manner is provided that 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. The use of a spring is possible in all embodiments of the invention.

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 Abdeckflanschs.

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.

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

1 Sectional view of a prior art in the assembled state,

2 Section through a nozzle body according to the prior art and 1 .

3 Section through a pipe socket according to the prior art and 1 .

4 Section through a bearing housing according to the prior art and 1 .

5 Section through various sealing bodies of the prior art and 1 .

6 Section through a cover flange according to the prior art and 1 .

7 Section through a nozzle according to the prior art and

8th Section through a nozzle in a further embodiment with maintenance opening according to the prior art,

9 a sectional view of an embodiment of a nozzle according to the invention in the assembled state,

10 a sectional view of some items of an embodiment of a nozzle according to the invention in the disassembled state.

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 1 is a sectional view of a nozzle I according to the prior art in the fully assembled state shown. 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 is a bearing tube 11 formed. This is one liquid-tight seal to the outside to the liquid supply A guaranteed. In contrast to the solutions of the prior art, the bearing L is now on the outer circumference of the bearing tube 11 intended. For example, here are bearings 4 arranged as a ball bearing, by a bearing housing 5 are surrounded. The bearing housing 5 engages in a provided on the nozzle body groove 12 one. Thus, an overlap is achieved and it is no longer possible that escaping cleaning fluid from this side gets into the storage L. Into the interior of the warehouse floor 11 is a pipe socket 2 pushed in and through the connecting means 25 , Eg a screw, stable connected. This contributes to the outer circumference, that is, so on the inner circumference of the bearing tube 11 facing side in the embodiment, five packings 3 . 3.1 . 3.2 . 3.3 . 3.4 . 3.5 , You are in a gap 13 between bearing tube 11 and pipe socket 2 , These seal pieces 3.1 . 3.2 . 3.3 . 3.4 . 3.5 seal the nozzle I or the nozzle body 1 towards the outside against escaping liquid. In contrast to the prior art, the sealing arrangement is thus located in the interior of the bearing tube or of the nozzle main body 1 that any leaking cleaning fluid in case of damage to the seals no longer in the camp 4 can get. This is additionally ensured by the bearing housing 5 , which at the nozzle body 1 groundbreaking side by means of a cover flange 21 is sealed, in turn against escaping liquid to the pipe socket 2 through a seal 32 is sealed and in particular with its outer circumference, the bearing housing 5 seals against incoming liquid. This ensures an overall tight connection, which both the tightness with respect to the bearing tube 11 but also regarding the pipe socket 2 guaranteed. In the 4 becomes clear that at the the nozzle body 1 facing side nor a splash guard seal 51 is provided. This is in 1 not apparent. Also not apparent is the specific structural design of the Abdeckflansches 21 to which in the description of the 6 will be discussed in more detail. At the nozzle body 1 is the output side, that is, in the direction of the liquid outlet nozzle B, a nozzle tube 6 arranged. This can of course be angled depending on the purpose, in order to ensure an optimum angle of the impact of the cleaning liquid on the material to be cleaned. On the opposite side is a guide wing 7 provided that 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 number 31 refers to an O-ring seal, which has both a sealing effect, but at the same time the seal piece 3.1 . 3.2 . 3.3 . 3.4 . 3.5 against a rotation on the respectively arranged side to the bearing tube 11 or to the pipe socket 2 guaranteed. In case of wear of the seal piece 3.1 . 3.2 . 3.3 . 3.4 . 3.5 then, of course, a sealing effect also occurs through this O-ring. The seal pieces 3.1 . 3.2 . 3.3 . 3.4 . 3.5 own, as already described above, even a sealing effect. By arranging the seal pieces side by side a sufficiently wide sealing surface is ensured. In addition, a "floating storage" of the pipe socket 2 in the bearing tube 11 ensures that a "floating seal" is created. 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 2 now shows an individual view of the nozzle body according to the prior art. All references were already in the description of the 1 presented. These are expressly referred to.

The 3 shows the pipe socket 2 According to the state of the art. This will, as from the 1 visible, in the mounted state in the bearing tube 11 of the nozzle body 1 inserted. At the right side in the representation then the cover flange 21 assembled.

The 4 shows a section through the bearing housing 5 which is part of the L storage. With the reference number 51 In this case, a splash guard is called, the bearing not shown here 4 protects against incoming spray from the nozzle body facing side. As a warehouse 4 is preferably a ball bearing.

The 5 each shows a section through different packings 3.1 . 3.2 . 3.3 . 3.4 . 3.5 According to the state of the art. The reference number has been indicated schematically by an arrow 3 chosen to generally designate the packings. These can, as already described, be formed of different materials. The seal piece 3.1 has on the outer circumference a small groove which serves to receive a seal, such as an O-ring. This serves for a determination of the packer 3.1 on the outside, on the other hand, but also at the same time the seal. Furthermore, the side surfaces of the packer 3.1 , but also the other pieces of packing 3.2 . 3.3 . 3.4 . 3.5 designed 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 packer 3.2 , Again, it is possible, and as in 1 shown to insert a sealing ring in the form of an O-ring or other seal. Otherwise, the embodiment is analogous to the packer 3.1 , Of course, it is also possible according to the invention, a seal piece 3.3 use that 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 6 shows the cover flange 21 According to the prior art, a connection interface 24 having. Via this connection interface 24 the nozzle is ensured in total to the liquid supply A, for example in the form of a not shown Flüssigkeitszuführleitung the cleaning device. An approach 22 is formed so that it is attached to a corresponding groove of the bearing housing 5 can intervene. Furthermore, a collecting chamber 23 shown, which is formed so that on the one hand from the seal leaking fluid into this collecting chamber 23 can get, however, so that a penetration into the bearing housing 5 or in the camps 4 not possible. The collecting chamber possesses this 23 at least one outlet opening 26 (see eg 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 will be a timely replacement of the seal pieces 3.1 . 3.2 . 3.3 . 3.4 . 3.5 ensured. The pipe socket 2 Partially in the cover flange 21 inserted and secured against rotation by means of an unspecified countersunk screw.

The 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 is the camp 4 on the pipe socket 2 and inside the bearing tube 11 arranged, with the bearing tube 11 on the nozzle body 1 is arranged, however, so that liquid, if from the seals 31 or the resulting spaces, through the warehouse 4 flows. This causes the previously described negative effects, after which the bearings 4 wear out very quickly when the cleaning fluid escapes. All other reference numerals correspond to those already presented, so that will not be discussed again explicitly.

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

On the front side of the rotating nozzle body is now a maintenance opening 14 coaxial with the axis of rotation R provided. This maintenance opening 14 is frontally during normal operation of the nozzle through the shutter 15 sealed against leakage and sealed. In the embodiment shown, the closure is 15 designed as a hollow screw, which has a thread with the maintenance opening 14 is tightly screwed. By removing the closure 15 the nozzle is made accessible from the front of the rotating body for maintenance.

Between the lock 15 and the sealing pieces 3 Here is an effective along the rotation axis R spring 17 intended. This spring 17 pushes the sealing pieces 3 in the axial direction against each other, thus preventing a Wegwandern of the sealing pieces during rotation of the nozzle and ensures that no leakage gap between the sealing pieces 3 can arise. The feather 17 gets through the end of the closure 15 , which is facing away from the end face of the rotating body biased. 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 feather 17 then takes care of it by means of the shutter 15 introduced preload that the sealing pieces 3 despite the loss of length caused by the axial wear without leakage gap are compressed in the axial direction. In the 8th spring shown as a spiral spring 17 can of course also be formed by another resilient element such as a plate spring or a spring element made of an elastomer.

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

The flow of cleaning fluid through the shutter 15 , which is formed in the present representation as a hollow screw, is effected by one or more radial bores 18 in the lock 15 ,

Camps 4 are in the present embodiment by additional sealing discs 41 Protected against splashing water during operation of the nozzle. These washers 41 are on both the rotating body facing side as well as on the cover flange 21 facing side provided.

The cover flange 21 is in the in 8th illustrated embodiment on the thread 52 directly with the bearing housing 5 screwed. The thread 52 is on an outer periphery of the cover flange 21 or on an inner circumference of the bearing housing 5 intended. Thus, no further fasteners and the Abdeckflansch are required 21 can by simple rotation of the bearing housing 5 removed or on the bearing housing 5 to be assembled. By this rotational movement is simultaneously the bias of the bearings 4 opposite the bearing housing 5 set.

For a change of the sealing pieces 3 or the sliding washers 33 First, the cover flange 21 from the bearing housing 5 unscrewed. It also the pipe socket 2 from the sealing pieces 3 and sliding washers 33 drawn. To remove the old sealing elements now the maintenance opening 14 by removing the lock 15 open. Through this approach, the old sealing elements can now be easily removed from the bearing tube 11 to the opposite side of the maintenance opening 14 Push out. By pushing this out from one side to the other of the bearing tube 11 It is ensured that the sealing surface on the inside of the bearing tube 11 not damaged.

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

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

Of course, a positive connection for the other combination is provided. The sealing pieces 3 their seals 31 against the surface of the pipe socket 2 dense, are then form-fitting and against rotation with the inner surface of the bearing tube 11 connected. A positive connection is achieved, for example, by a tongue and groove connection.

9 shows a sectional view of an embodiment of a nozzle according to the invention in the assembled state. Parts that are not referenced correspond to the parts described in the preceding figures of the prior art. In 9 are the cover flange 21 and the pipe socket 2 shown in one piece. At the left end of the pipe socket 2 is a mounting flange 27 appropriate. The union of cover flange 21 and pipe socket 2 is with the fixed bearing housing 5 screwed. Inside the bearing tube 11 is a seal piece 3 arranged. A side surface 35 of the sealing piece 3 forms together with the face 28 of the bearing tube 2 the sliding gap 28 , On the left side of the sliding gap 28 is that, with the main body 1 rotating sealing piece 3 , on the right side is the fixed pipe socket 2 , In the sliding gap 28 is located in the operation of the nozzle, a thin liquid film, which for lubrication of the sliding pair of side surface 35 and face 28 provides. At the same time, the sliding gap 28 but so narrow that no or almost no liquid can escape. The assembly collar 27 protrudes into the interior of the sealing pieces 3 one. mounting collar 27 and pipe socket 2 are one-piece, ie form a component. A sealing effect is the assembly collar 27 not ago, he only serves a simplified installation of the sealing piece 3 , On the outer circumference of the sealing piece 3 are two poetry rings 39 attached to the inner surface of the bearing tube 11 to the outer surface of the sealing piece 3 seal and for a parallel positioning of the sealing piece 3 to the cylindrical bore in the bearing tube 11 to care. The storage L is through two bearings 4 formed here as angular contact ball bearings 45 are formed. The two angular contact ball bearings 45 are arranged so that they can absorb the load generated by the Abdrückkraft FA. The forcing force FA results from the internal pressure of the liquid in the bearing tube 11 , which generates a force that the rotating nozzle body 1 to the left away from the bearing tube 2 suppressed.

10 shows a sectional view of some items of an embodiment of a nozzle according to the invention in the disassembled state. On the left is the rotating nozzle body 1 to see, the one piece the bearing tube 11 is formed. In the middle is the fixed bearing housing 5 with two built-in bearings 4 to see. On the far right is the cover flange 21 with the molded pipe socket 2 to see. The end face used for sealing 28 is located on the left-oriented end of the pipe socket 2 , During assembly, the bearing tube 11 in the inner rings of the two bearings 4 pushed. Subsequently, the in 10 not shown seal piece 3 introduced into the bearing tube and the cover flange 21 bolted to the bearing housing, the pipe socket 2 in the bearing tube 11 penetrates.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19963496 A1 [0003]
• EP 2848316 A1 [0004]

Claims (25)

Nozzle comprising - a rotating nozzle body ( 1 ), with a fluid guide providing Lagerlager ( 11 ) and a liquid outlet nozzle (B) - a liquid supply (A), - and a bearing (L), wherein the bearing (L) on an outer circumference of the bearing tube ( 11 ) - a fixed pipe socket ( 2 ), which enters the bearing tube ( 11 ) is insertable, wherein the pipe socket ( 2 ) as a supply of liquid to the nozzle body ( 1 ) and a seal of an inner periphery of the bearing tube to an outer periphery of the pipe socket ( 2 ) is provided, characterized in that at least one designed as a hollow cylinder seal piece ( 3 ) in the bearing tube ( 11 ) is arranged and the packer ( 3 ) liquid-tight to the inner circumference of the bearing tube ( 11 ) in the bearing tube ( 11 ) can be introduced and for sealing the rotating Düsengrundköpers ( 1 ) to the fixed pipe socket ( 2 ) a sliding gap ( 34 ) between a side surface ( 35 ) of the seal piece ( 3 ) and an end face ( 28 ) of the pipe socket ( 2 ) is provided. Nozzle according to claim 1, characterized in that a fixed cover flange ( 21 ) is provided, which releasably with a likewise fixed bearing housing ( 5 ) is connectable and the pipe socket ( 2 ) the cover flange ( 21 ) is formed and pipe socket ( 2 ) and cover flange ( 21 ) form a common component. Nozzle according to one of the preceding claims, characterized in that in the axial direction to the end face ( 28 ) of the pipe socket ( 2 ) then a mounting collar ( 27 ) is provided whose outer diameter is smaller than the inner diameter of the hollow cylinder designed as a sealing element ( 3 ). Nozzle according to claim 3, characterized in that the assembly collar ( 27 ) in the assembled state of the nozzle in the axial direction in the sealing element ( 3 ). Nozzle according to one of the preceding claims, characterized in that the sealing element ( 3 ) is made of hard metal or ceramic and on its outward towards the bearing tube ( 11 ) directed surface at least two sealing rings ( 39 ) are provided of an elastic material. Nozzle according to one of the preceding claims, characterized in that the pipe socket ( 2 ) and the cover flange ( 21 ) consist of an iron-based material. Nozzle according to one of the preceding claims, characterized in that the bearing (L) of the rotating nozzle main body ( 1 ) between an outer circumference of the bearing tube ( 11 ) and the stationary bearing housing ( 5 ) is arranged. Nozzle according to claim 7, characterized in that the bearing (L) is designed as a roller bearing and at least two bearings ( 4 ). Nozzle according to claim 8, characterized in that the bearings ( 4 ) are designed as angular contact ball bearings or tapered roller bearings, wherein the axial load-receiving direction (R) of the bearings ( 4 ) parallel to the cover flange ( 21 ) in the direction of the rotating nozzle main body ( 1 ), is oriented by the fluid pressure generated inside the nozzle Abdrückkraft. Nozzle according to claim 8 or 9, characterized in that the bearings ( 4 ) consist of ceramic, glass or plastic. Nozzle according to one of the preceding claims, characterized in that the sealing piece ( 3 ) inside the bearing tube ( 11 ) is axially positionable by a fixing element. Nozzle according to claim 11, characterized in that the fixing element is designed as a spring, shoulder, holder, abutment, abutment shoulder or mounting collar. Nozzle according to one of the preceding claims, characterized in that a plurality of sealing pieces ( 3 . 3.1 . 3.2 . 3.3 . 3.4 . 3.5 ) are provided and the seal pieces ( 3 . 3.1 . 3.2 . 3.3 . 3.4 . 3.5 ) are formed of 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 on the outer circumference of the bearing tube ( 11 ) and / or the storage (L) next to the warehouse (s) ( 4 ) a bearing housing ( 5 ), which on the the nozzle body ( 1 ) facing side in a groove provided there ( 12 ) Correspondingly, in particular engages without contact. Nozzle according to one of the preceding claims, characterized in that the bearing housing ( 5 ) as a lining for the bearings ( 4 ), for example, ball bearings and preferably a splash guard seal ( 51 ), which on the the nozzle body ( 1 ) facing side and / or on both sides of the bearing (s) ( 4 ) a sealing washer ( 41 ) is provided. Nozzle according to one of the preceding claims, characterized in that the bearing, bearing components or the bearing housing is wholly or partly made of ceramic, glass, plastic, metal or steel, preferably stainless steel or combinations thereof is / are. Nozzle according to one of the preceding claims, characterized in that on the pipe socket ( 2 ) a cover flange ( 21 ) is provided, on which a in the bearing housing ( 5 ) engaging approach ( 22 ), which serves as another splash guard for the bearing (s) ( 4 ) serves. Nozzle according to one of the preceding claims, characterized in that in the cover flange ( 21 ) a collecting chamber ( 23 ) is provided for optionally exiting cleaning fluid and the collecting chamber ( 23 ) at least one outlet opening ( 26 ) and / or on the cover flange on the in the installed state of the nozzle (I) facing away from 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 body ( 1 ) at its front side a maintenance opening ( 14 ), which by a removable closure ( 15 ) is closable. 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 ) and / or the liquid flowing through the nozzle through one or more radial bores ( 18 ) in the wall of the closure formed as a hollow element ( 15 ) flows. Nozzle according to one of the preceding claims, characterized in that the sealing pieces ( 3 ) through the maintenance opening ( 14 ) is removable or replaceable without the rotating body ( 1 ) 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 ) against the sealing pieces ( 3 ) is biased. 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 ), whose seals ( 31 ) against the rotating bearing tube ( 11 ), in the circumferential direction positively with the fixed pipe socket ( 2 ) and / or those sealing pieces ( 3 ) whose seals against the fixed pipe socket ( 2 ) seal in the circumferential direction positively with the rotating bearing tube ( 11 ) are connected. Nozzle according to one of the preceding claims, characterized in that the cover flange ( 21 ) via a thread ( 52 ) with the bearing housing ( 5 ) and thus in particular the bearing (s) ( 4 ) in the bearing housing ( 5 ). Nozzle for a device for cleaning articles with aggressive cleaning fluids, according to one of the preceding claims, wherein the nozzle (I) comprises a rotating nozzle body ( 1 ), on which a bearing tube ( 11 ) is arranged or molded liquid-tight, on the outer circumference of the bearing tube ( 11 ) the bearing (L) in the form of at least one bearing ( 4 ) surrounding bearing housing ( 5 ) is provided, which in a circumferential groove ( 12 ) on the nozzle body ( 1 ) without contact, wherein the liquid supply (A) via a pipe socket ( 2 ), which enters the bearing tube ( 11 ) is 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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