EP1563919B1 - Device for cleaning the surface of cylindrical bodies as rolls or rollers - Google Patents

Abstract

An assembly removes surface particles such as scale, metal residues or paint from the surface of a roller or drum. The assembly consists of two parallel arrays of fluid cleaning jets on beams suspended at their ends via twin forks by a lifting eye. The cleaning jets are closely associated with matching suction pipes.

Description

The invention relates to a device for cleaning the surface of cylindrical bodies, such as rollers or rollers. Devices of this type are used, for example, to remove residues that remain on the surface of rolls or rollers during the processing of sheets or strips. These residues may be, for example, scale or metallic particles which firmly adhere to the surface of the respective roll or roller. Such residues typically accrue during the deforming processing of metal sheets or strips. Likewise, however, the residues may also be lacquer particles or comparable substances adhering firmly to the respective surface, which are produced during the coating of metal sheets or strips.

A device of the aforementioned type is known for example from DE 198 48 179 A1 or JP-A 2000271615. The known device is intended for cleaning rolls / and / or rolls in strip casting plants, rolling mills or comparable strip processing lines. For this purpose, the known device nozzles, which are held linearly displaceable along the guides to be cleaned in itself. The distance between the Cleaning nozzle and the roller to be cleaned is adjustable according to the respective operating requirements. In addition, the traverse speed with which the nozzle is moved along the roller, depending on the speed at which the tape passes through each of the rollers to be cleaned.

Another apparatus for cleaning pulleys, which are passed by a rolling mill emerging from a mill before it is reeled, is known from JP 06-106213 A. This known device also has a nozzle which can be moved along the respective roller to be cleaned. From the nozzle, a cleaning fluid jet is directed onto the roller, the pressure and orientation of which are selected so as to peel off the impurities adhering to the roller.

With the comparable in terms of their arrangement and function described in JP 06-106213 A pulleys are usually arranged at the outlet of plants in which a steel strip is provided with lacquer or other coating. The rollers usually have a rubber coating or a jacket made of a similar elastic material. In order to remove the often strongly adhesive coating particles from its surface, solvents must be used.

The problem with the above-described devices is in each case that the fluid jet discharged by them freely enters the environment after being hit on the surface to be cleaned. In this way, the fluid and the entrained by him, each separated from the surface to be cleaned particles freely distributed freely in the environment of the cylindrical body to be cleaned. This proves to be particularly problematic when the cleaning fluid mixed with adhering to the body lubricant residues or it is the fluid is a solvent.

Starting from the above-described prior art, the object of the invention to provide a device that can be used in many ways and can be cleaned with a significantly reduced risk of pollution of the environment by the cleaning fluid cylindrical body.

This object is achieved by a device for cleaning the surface of cylindrical bodies, such as rollers or rollers, with at least one nozzle for discharging cleaning fluid to the surface to be cleaned, with a can be placed on the surface to be cleaned housing whose length at least corresponds to a part of the length of the cylindrical body and having an outlet opening, through which discharged from the nozzle cleaning fluid impinges on the surface to be cleaned, wherein the housing in the region of the outlet opening is adapted to the shape of the cylindrical body, that the housing in on the cylindrical body mounted state flush with this area and sitting in the radial direction on the surface to be cleaned, and equipped with at least one suction for sucking in the cleaning operation on the surface to be cleaned apt cleaning fluid, wherein the suction opening of the Suction element is arranged adjacent to the outlet opening of the housing.

The device according to the invention has a housing which can be placed flush in the region of its outlet opening on the surface to be cleaned. The housing is not pressed firmly on the surface in question, but can be raised. In this way it is achieved that the fluid jet impinging on the surface to be cleaned accumulates in the region of the edges of the outlet opening, so that the housing is slightly raised by the accumulating liquid. The liquid film pressed in this way between the housing and the surface to be cleaned prevents the surface from being damaged as a result of relative movement taking place between the housing and the surface during cleaning. Instead, the housing can be moved substantially contactlessly over the surface to be cleaned. This proves to be particularly favorable when using the device according to the invention rolls or rollers are cleaned which rotate about their axis of rotation during the cleaning process. The thickness of the liquid film can be easily adjusted by the force with which the housing is loaded in the direction of the surface to be machined.

By simultaneously the suction openings of suction elements are arranged in the region of the outlet openings, it is ensured that there is no discharge of excessive amounts of cleaning fluid from the housing. Instead, by far the predominant amount of cleaning fluid is removed from the housing by means of the suction element. The invention enables in this way the controlled Removal of the cleaning fluid. The free distribution of finely atomized fluid mist is reliably prevented in a device according to the invention. Thus, with a device according to the invention, it is also safe to use solvents for cleaning.

A particularly easy-to-manufacture construction of a device according to the invention results when the suction element is designed as a tube which limits the outlet opening laterally at least in sections.

Also in view of the ease of manufacture and versatility, it is advantageous if the outlet opening of the device according to the invention is rectangular. In this case, the suction can be easily aligned so that it is aligned parallel to the axis of its longitudinal axis when mounted on the cylindrical body housing. This proves to be particularly useful when the cylinder body to be cleaned during the cleaning process rotates and a suction on the lying in the direction of rotation one side and another suction on the opposite side of the outlet opening is arranged.

Another particularly practical embodiment of the invention is characterized in that the edge of the outlet opening is formed at least in sections by curved to the interior of the housing flow elements. These flow elements support the damming of the cleaning liquid in the edge region of the outlet opening, so that the desired "aquaplaning effect", through which the housing floats on a liquid film, especially safely enters. In such embodiments of the invention, in which the suction elements are tubular, the flow elements can be conveniently prepared by these suction.

Another, the safety of the removal of the cleaning liquid from the housing additionally improving embodiment of the invention is characterized in that the housing carries in the region of the outlet opening, which follows the circumference of the cylindrical body, a seal in the mounted on the cylindrical body state is close to this. The seal is preferably designed so that it seals regardless of the respective outer diameter of the cylindrical body to be cleaned. In this way, cylindrical bodies with different diameters can be easily cleaned with one and the same device according to the invention.

The efficiency of the jet of fluid discharged from the nozzle can be optimized by directing the jet emitted by the nozzle at a flat angle to the surface of the cylindrical body to be cleaned when the housing is mounted on the cylindrical body.

In principle, it is possible to use slot jet nozzles or comparable nozzles with nozzle openings extending over a certain length section. In particular, however, if the cleaning fluid to be applied at a higher pressure, it proves to be favorable to arrange a plurality of individual nozzles in the housing. This can be a good cover to be cleaned Surface can be achieved with the jets emitted by the individual nozzles in that a group of nozzles emit one in a first direction and the other group of nozzles directed in a different direction of the beam. In particular, when the outlet opening is formed at right angles, a particularly effective cleaning in this case can be achieved if the emitted from the nozzles of a group of rays are directed towards a arranged on one side of the outlet opening and the suction of the nozzles the other group emitted rays are directed towards a arranged on the opposite side of the outlet opening suction.

In order to be used as versatile as possible, the length of the housing of a device according to the invention is preferably limited to only a portion of the length of the cylindrical body to be cleaned. The device can then be moved along the body to detect its entire surface. For this purpose, the device according to the invention may be equipped with a guide on which the housing is mounted displaceably. Along this guide, the housing can be moved manually or driven by a motor along the cylinder body to be cleaned. In view of the versatility of the device according to the invention it is particularly advantageous if the guide has a holder for releasably attaching to a storage for the body to be cleaned. This makes it possible to use the device according to the invention as a mobile unit in many different places, without the need for complex conversions.

Fig. 1

eine Vorrichtung zum Reinigen von Walzen in einem Querschnitt;

Fig. 2

die Vorrichtung gemäß Fig. 1 in einem Längsschnitt;

Fig. 3

die Vorrichtung gemäß Fig. 1 und 2 in Betriebsstellung in einer ersten seitlichen Ansicht;

Fig. 4

die Vorrichtung gemäß Fig. 1 und 2 in Betriebsstellung in einer zweiten seitlichen Ansicht.

The invention will be explained in more detail with reference to a drawing illustrating an exemplary embodiment. Show it:

Fig. 1

a device for cleaning rolls in a cross section;

Fig. 2

the apparatus of Figure 1 in a longitudinal section.

Fig. 3

the apparatus of Figures 1 and 2 in the operating position in a first lateral view.

Fig. 4

the device according to FIGS. 1 and 2 in the operating position in a second lateral view.

The device 1 for cleaning rolls W has a housing 2 which has a cross-sectionally substantially triangular, pointed roof-like shape. The length LG of the housing 2 corresponds to a fraction of the length LW of the rollers W to be cleaned.

In between the longitudinal walls 3,4 of the housing 2 enclosed gusset 5, a manifold 6 is mounted, which supplies paired nozzles 7,8,9,10 with cleaning fluid. The manifold 6 is connected via a supply line 6a with a fluid supply, not shown, which feeds it with the standing under a high pressure cleaning fluid.

On the opposite side of the gusset 5 of the housing 2, an outlet opening 11 is formed. The outlet opening 11 has a substantially rectangular, in the longitudinal direction of the housing 2 extending form. Their longitudinal sides are limited by tubular suction 12,13, which are supported by the longitudinal walls 3,4 of the housing 2. The slot-shaped also extending in the longitudinal direction suction openings 14,15 of the tubular suction 12,13 are directed to the suction opening 11.

The suction elements 12, 13 have a circular cross-sectional shape. In this way, they form, in particular in the region of their side facing away from the gusset 5, located below the suction opening portions of flow elements 16,17, which are designed bent in the direction of the interior of the housing 2. The suction elements 12,13 are connected via a suction line 12a to a suction device, not shown, which sucks in the suction 12,13 entering cleaning fluid and feeds a treatment.

The supplied from the manifold 6 nozzles 7,8,9 are aligned so that each of them discharged fluid jet F1 each approximately parallel to the side wall 2 aligned at a shallow angle through the outlet opening 11 occurs. The nozzle 7,8,9 respectively associated nozzles, of which in the figures only the nozzle 7 associated nozzle 10 can be seen, are aligned in a corresponding manner so that each of them discharged fluid jet F2 runs parallel to the side wall 3 and in a direction away from the fluid jet F1 Direction also occurs at a shallow angle through the outlet opening 11.

On the short sides of the housing 2, the outlet opening 11 is delimited by the walls 18,19 closing the housing on these short sides. These walls 18, 19 have, at their edges assigned to the outlet opening 11, in each case a circular segment-shaped recess 20 which extends over the width of the outlet opening 11 and whose radius r is matched to the external radius of the rollers W to be cleaned. At the edge of the recesses 20 extends a lip seal 21 which rests tightly against the roll surface WO when placed on the roll W to be cleaned housing 2.

On its ridge, the housing 2 carries a guide bushing 22, whose passage opening 22a is aligned transversely to the longitudinal extension of the housing 2. Through the passage opening 22a of the guide bush 22, a rod-shaped, rectilinear guide 23 is guided. The bearing of the guide bush 22 on the guide 23 is designed so that the housing 2 can be moved manually with the elements mounted in it in a linear movement along the guide 23.

At both ends of the guide 23 is coupled in each case with a holder 24,25. The holders 24, 25 each have a holding section coupled to the guide 23 and a support section bent at right angles thereto. In this way, the guide 23 and the brackets 24,25 form a bracket whose free ends 26,27 are hollow-like sleeve-shaped.

For attachment of the device 1 to the roller W to be cleaned, these free ends 26,27 placed on mandrels 28,29, which are provided vertically aligned on the housings of the roller bearings 30,31. By means of a clamping screw 32, the brackets are then firmly clamped with the mandrels 28,29, so that the guide 23 is aligned axially parallel to the axis of rotation of the roller W and positioned in a running through the axis of rotation of the roller W vertical plane above the roller W.

In this state, the housing 2 sits with its outlet opening 11 on the longitudinal sides delimiting tubular suction 12,13 flush on the surface to be cleaned M of the roller W on. In this case, between the guide 23 and the guide bush 22 so much game that the housing 2 can be raised by a small amount in the vertical direction. On the short sides, the housing 2 is sealed from the environment by the lip seals 21.

The width of the outlet opening 11, the arrangement of the tubular suction 12,13 and the recesses 20 on the short sides of the housing 2 with the arranged at its edge lip seals 21 are dimensioned so that the housing 2 can be placed on rollers W with different diameters and yet each a flush seat with secure sealing lip seals 21 is guaranteed.

Under the roller W, a tub 33 is provided, which catches from the roller W during the cleaning operation dripping down cleaning fluid and passes to the processing device, not shown.

For cleaning the roller W, which slowly rotates during the cleaning process, the housing is placed on the surface of the respective roller W. The supply line 6a then supplies pressurized cleaning fluid, which is, for example, a solvent or water, to the distributor tube 6 and delivers it to the nozzles 7-10. The angle at which the nozzles 7-10 deliver their fluid jet F1, F2 in each case is selected so that the fluid jets F1, F2 at a shallow, cutting angle directly in front of the suction openings 14,15 of the suction 12,13 on the surface Meet M. The contaminants detached from the surface M by the fluid jets F1, F2 are sucked off directly after the impingement of the fluid jets F1, F2 via the suction elements 12, 13 and fed to the treatment via the suction line 12a.

Since the impingement region of the fluid jets F1, F2 is located near the suction elements 12, 13, the fluid impinging on the surface M shoots at high flow velocity in the direction of the flow elements 16, 17 respectively formed on the suction elements 12, 13. As a result, forms on the flow elements 16,17 a fluid accumulation on which the housing 2 floats. Between the housing 2 and the surface M of the roller W, a thin fluid film is thus formed, which ensures that the housing 2 does not directly touch the surface M during the machining process. In this way, it is ensured that despite the relative movements between the displaced along the roller W housing 2 and the meanwhile additionally rotating roller W does not damage the surface M. At the same time, he puts on the Surface M remaining fluid film sure that the housing 2 with the elements mounted in it with minimum friction by hand with minimal effort along the guide 23 over the surface M can be moved to achieve a uniform cleaning of the surface M of the respective roll W.

REFERENCE NUMBERS

1

Device for cleaning rollers

2

casing

3.4

Longitudinal walls of the housing 2

5

gore

6

manifold

6a

supply line

7-10

jet

11

outlet opening

12.13

suction elements

12a

suction

14.15

suction

16.17

flow elements

18.19

lateral walls

20

recess

21

lip seal

22

guide bush

22a

Through opening of the guide bush 22

23

guide

24.25

brackets

26.27

free ends of the brackets 24,25

28.29

mandrels

30.31

roller bearings

32

clamping screw

33

tub

F1, F2

fluid jets

LG

Length of the housing 2

LW

Length of rolls to be cleaned W

M

Surface of the rolls W

r

Radius of the recess

W

roll

Claims (14)

1. Device for cleaning the surface (M) of cylindrical bodies, such as rolls (W) or rollers,

   - having at least one nozzle (7-10) to deliver cleaning fluid onto the surface (M) to be cleaned,

   - having a housing (2) which can be placed over the surface (M) to be cleaned, whose length (LG) corresponds to at least a part of the length (LW) of the cylindrical body and which has an outlet (11), through which cleaning fluid delivered from the nozzle (7-10) hits the surface (M) to be cleaned, characterized in that

   - the housing (2) in the region of the outlet (11) is adapted to the shape of the cylindrical body so that the housing (2), in the state placed over the cylindrical body, sits flush with this region and in the radial direction can be lifted off the surface (M) to be cleaned, and

   - having at least one suction element (12,13) for sucking off cleaning fluid hitting the surface (M) to be cleaned during the cleaning operation, wherein the suction opening (14, 15) of the suction element (12,13) is arranged adjacent to the outlet (11) of the housing (2).
2. Device according to Claim 1, characterized in that the suction element (12, 13) is configured as a tube which laterally borders the outlet (11) at least in sections.
3. Device according to one of the above claims, characterized in that the outlet (11) has a rectangular form.
4. Device according to Claim 2 or 3 characterized in that the suction element (12, 13), in the state placed over the cylindrical body, extends parallel to its longitudinal axis.
5. Device according to one of the above claims, characterized in that the edge of the outlet (11) at least in sections is formed through flow elements (16, 17) bent towards the housing interior.
6. Device according to Claim 5, characterized in that the flow elements (16, 17) are formed by the suction elements (12, 13).
7. Device according to one of the above claims, characterized in that the housing (2) in the region of the outlet (11), which follows the circumference of the cylindrical body, supports a seal (21) which, in the state placed over the cylindrical body, lies closely thereon.
8. Device according to one of the above claims, characterized in that the jet (F1, F2) delivered by the nozzle (7-10), in the state of housing (2) placed over the cylindrical body, is directed at a shallow angle onto the surface (M) of the cylindrical body to be cleaned.
9. Device according to one of the above claims, characterized in that several nozzles (7-10) are arranged in the housing (2).
10. Device according to Claim 9, characterized in that a group of the nozzles (7-9) delivers a jet (F1) aligned in a first direction and the other group of nozzles (10) delivers a jet (F2) aligned in another direction.
11. Device according to Claim 4 or 10, characterized in that the jets (F1) delivered by the nozzles (7-9) of the one group are aligned toward a suction element (12) arranged on one side of the outlet (11) and the jets (F2) delivered by the nozzles (10) of the other group are aligned toward a suction element (13) arranged on the opposite side of the outlet (11).
12. Device according to one of the above claims, characterized in that the housing (2) is displaceably mounted on a track (23).
13. Device according to Claim 12, characterized in that the length of the track (23) is at least equal to the length (LW) of the cylindrical body to be cleaned.
14. Device according to one of Claims 12 or 13, characterized in that the track (23) exhibits a bracket (24, 25) for detachably fastening to a bearing (30, 31) for the body to be cleaned.

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