EP3325182B1 - Washing machine for longitudinal profiled sections with a film cover, and method for washing longitudinal profiled sections - Google Patents

Description

The invention relates to a washing device for long profiles according to the preamble of claim 1 and a method for washing long profiles.

Washing machines for cleaning pipe sections are for example from the EP 0 638 370 A1 known. A disadvantage of these washing machines, however, is that scratches can occur on the outer wall of sensitive pipes, because small pipes, in particular with a diameter, can fall out of the receptacles too early and scratch them. In particular, the washing machines cannot be set for pipes of different diameters.

Furthermore, from the DE 10 2013 114 850 A1 a washing machine for pipe sections is known in which a height of the outlet opening is adjustable. A disadvantage of the washing machine mentioned, however, is the fact that washing fluid must be pressed under high pressure through the chambers, which are delimited on the side by fins, in order to achieve a sufficient cleaning effect of the pipe sections, but a lot of water flows between the fins and the cover out of the chambers.

In the EP 0 630 296 describes a washing drum for long profile sections, the chambers of the drum being covered on the outside by a flexible film which is firmly anchored on both long sides.

On the one hand, in addition to ever increasing demands on the precision when cutting long profiles, in particular pipes, which can be in the micrometer range and below, there are also increasingly higher requirements for gentle treatment, especially of the outer surfaces of the cut long profiles. In particular, the long profiles cut to length can later be used as exhaust pipes, etc. In this case, no scratches should appear on the outer surfaces. On the other hand, economical use of the washing fluid is also required for environmental reasons.

It is an object of the present invention to provide an apparatus and a method for washing long profiles which enable washing of long profiles which is as gentle as possible but also saves water.

With regard to the device, the structure is fulfilled by a washing device mentioned at the beginning with the features of claim 1.

Long profiles are understood here to mean hollow or solid profiles, in particular pipes which are made of or can have different materials, but metal or steel profiles are preferably understood to be long profiles.

The washing device for long profiles has a drum rotatable about a horizontal axis of rotation aligned in the longitudinal direction. The axis of rotation is preferably arranged exactly horizontally or at least at an angle of +/- 10 ° horizontally to the ground. Along the circumference of the drum, a plurality of receptacles which are laterally delimited in the radial direction by slats and into which the long profiles can be inserted along the longitudinal direction are provided.

Each of the recordings has a leading and a trailing lamella. Each of the slats extends over the entire longitudinal extent of the drum. The slats have an open edge on the outside in the radial direction. The slats are preferably inclined forward in the direction of rotation of the drum.

The washing device has a receiving opening for the long profiles and an output opening for the long profiles spaced from the receiving opening in the direction of rotation of the drum and a transport path for the long profiles running between the receiving opening and the output opening.

The transport route for the long profiles can be above the axis of rotation, but also below the axis of rotation.

The washing device has at least one washing fluid outlet through which the receptacles pass during the rotation of the drum and flows out of the washing fluid into the receptacle just passing through, washing the long profile inserted into the receptacle. The at least one washing fluid outlet is arranged on one of the end faces of the drum next to the transport path. These can be wash fluid nozzles arranged next to one another in an arc, which spray, spray or push the wash fluid in the longitudinal direction into the respective passing chamber.

The washing fluid can be water and / or water enriched with additives; Corrosion protection agents, oil or another agent can be used as additives.

According to the invention, a flexible film covers at least the receptacles passing through the washing fluid outlet with direct contact with the lamellae, preferably with outer lamella edges. Due to the direct contact of the film with the lamellae, in particular lamella outer edges, the receptacles through which the washing fluid flows are closed less water-permeable or even water-impermeable on their open radial outer sides. A greater washing and cleaning effect is advantageously achieved by using less washing fluid.

The drum is preferably rotatably mounted with respect to the film, while the film itself is arranged in a fixed position with respect to a frame of the washing device. The drum rotates along an inside of the film, while the outer edges of the slats slide over the inside of the film.

The film is stretched along a portion of the outer circumference of the drum and along the entire length of the drum. The film not only lies loosely on the outer circumference of the drum, but it is provided on its longitudinal edges by means of tensioning supports which are tensioned around the outer circumference of the drum by means of tensioners.

The tensioners can be springs or pneumatic cylinders. The tensioners are not fully controlled during operation, so that a change in size of the film is compensated for by parameter changes such as changes in temperature, changes in moisture content or the like, i.e. the tension of the film is kept constant, essentially constant, preferably exactly constant, and thereby the film is one exerts constant force on the fins and maintains their sealing effect even with changing external parameters.

The film advantageously has direct contact with radial outer edges of the slats along the entire longitudinal extent of the slats of the passing receptacle during the rotational movement of the drum. As a result, each of the receptacles passing through the washing fluid outlet is advantageously secured over the entire longitudinal extent before the washing fluid outlet, which increases the cleaning effect.

According to the invention, at least one tensioning means, which is arranged along a longitudinal edge of the film, is provided, which generates a permanent prestress on the film during the rotation of the drum. The tensioning means can have a tensioning support which is firmly connected to the film, for example by, along a longitudinal edge of the film the film is screwed or welded or connected to the film with a clip connection. The tensioning support can be connected to tensioners which exert a tensioning force on the tensioning support so that the film is permanently pressed onto the drum.

A longitudinal edge of the film, which runs along the discharge opening, is advantageously designed to be adjustable in the circumferential direction of the drum. A height of the dispensing openings can thus be adjusted in the circumferential direction. By adjusting the position of the longitudinal edge of the film, the height of the dispensing opening can be changed and thus the premature falling out of the long profile from the receptacle can be counteracted. For this purpose, the height of the dispensing opening is adapted approximately to the diameter of the long profile. The height of the dispensing opening is preferably chosen to be somewhat larger than the diameter of the long profile.

According to the invention, the film has a tensioning device on both longitudinal edges. The two tensioning devices cooperate according to the invention, so that the film is designed to be movable back and forth in the circumferential direction. Thus, by moving the entire film, a height of the dispensing opening can be varied while at the same time maintaining the tension of the film.

The at least one washing fluid outlet is advantageously arranged in the direction of rotation next to the receiving opening and in the direction of rotation next to the at least one washing fluid outlet, at least one drying fan outlet is arranged. A drying fan makes it possible to pre-dry the long profiles that have already been washed in the same washing device.

The transport path is preferably provided above the axis of rotation of the drum, but it is also conceivable to arrange the transport path below the axis of rotation of the drum. In both cases, the film is stretched along a section of the circumference of the drum, and it covers the transport path or at least a section of the transport path, in the sense that the receptacles are closed radially outwards by the film along the transport path. Regardless of whether the transport path is provided at the top or at the bottom with respect to the axis of rotation, the receptacles are closed off by the film against washing fluid leakage.

The washing device can preferably have two or a larger number of drums arranged next to one another, which enable the long profiles to be automatically transferred from one drum to the other, the drum containing a washing fluid and the further drum can be equipped with a different washing fluid other than the washing fluid.

The film can be a plastic film, preferably with a thickness between 1-6 mm, particularly preferably 1-3 mm. This can be a polyethylene film.

In a second aspect, the object is achieved by a method having the features of claim 10. The method is particularly suitable for use with one of the washing devices mentioned above.

Long profiles are inserted into receptacles that are laterally delimited by slats and open in the radial direction. The long profiles are transported from a receiving opening for the long profiles in the direction of rotation of the drum to a discharge opening spaced apart from the receiving opening along a transport path. The receptacles pass through at least one washing fluid outlet, from which washing fluid flows into the receptacle just passing through and washes the inserted long profile.

According to the invention, a flexible film is stretched over at least the receptacles just passing the washing fluid outlet with direct contact with the lamellae of the passing receptacles. By tensioning the flexible film according to the invention, the receptacles are closed off radially outward and thus counteracting an escape of the washing fluid that flows through the receptacles. This advantageously significantly reduces the amount of washing fluid required.

The film is advantageously displaced relative to a frame in the circumferential direction of the drum, in that the effect of tensioning devices arranged on both longitudinal edges of the film is adjusted in combination with one another. As a result, a height of an outlet opening can be adapted to the diameter of the long profiles and thus counteracting the long profiles falling out of the outlet opening.

The washing fluid outlets and / or the drying fan outlets are arranged in a fixed position relative to the frame of the washing device. The recordings rotate past the washing fluid outlets and / or drying fan outlets during operation.

Fig. 1

eine erste Ausführungsform der erfindungsgemäßen Waschvorrichtung mit zwei Waschtrommeln, die jeweils eine einseitig spannbare Folie aufweisen,

Fig. 2

eine Waschvorrichtung mit zwei Waschtrommeln, die jeweils eine beidseitig spannbare Folie aufweisen.

The invention is described using two exemplary embodiments, in which:

Fig. 1

a first embodiment of the washing device according to the invention with two washing drums, each having a film that can be stretched on one side,

Fig. 2

a washing device with two washing drums, each having a film that can be tensioned on both sides.

Fig. 1 FIG. 2 shows one and another drums 1, 2 which are arranged next to one another and connected in their function one after the other and can be rotated about a horizontal axis of rotation 10, 11 each extending in a longitudinal direction L. Along an outer circumference of each of the two drums 1, 2 are aligned in the longitudinal direction L. Chambers 101, 102, 103, 104, 105, 106, 107, 108, 109 and 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210 are formed, each of which extends over an entire longitudinal extent of the drums 1, 2 extend. Each of the chambers 101, 102, 103, 104, 105, 106, 107, 108, 109 and 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210 is circumferentially closed by two laterally closed lamellae 3, 4 limited. The drums 1, 2 have a length of two meters and a diameter of almost one meter, for example. In each of the chambers 101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210 there can be one, two or a higher number of long profiles 5 can be inserted. The washing device in Fig. 1 has a receiving opening 6 on the far left for the individual long profiles 5. The drum 1 has an output opening 7 from which the long profile 5 can automatically roll into the chamber 200 of the further drum 2 via a receiving opening 8 of the further drum 2. The further drum 2 also has an output opening 9 for the individual long profiles 5.

The chambers 101, 102, 103, 104, 105, 106, 107, 108, 109 are open on the outside in the radial direction and, in the washing device according to the invention, are preferably sealed off from the outside by a flexible film 21, and the chambers 200, 201, 202, 203, 204 , 205, 206, 207, 208, 209, 210 are open on the outside in the radial direction and are preferably sealed to the outside by a further flexible film 30. Each of the two foils 21, 30 has two longitudinal edges 22, 23 and 31, 32, respectively, which are each provided with a tensioning support 24, 25 or 33, 34.

The following description is limited to drum 1 in FIG Fig. 1 . However, it can be applied analogously to the further drum 2.

The drum 1 in Fig. 1 rotates clockwise in the direction of rotation R. The chambers 100, 101, 102, 103, 104, 105, 106, 107, 108, 109 of the drum 1 are equipped with long profiles 5, and the long profiles 5 rotate along a transport path above the axis of rotation 10 of the drum 1 is provided up to the outlet opening 7 of the drum 1. A plurality of washing fluid nozzles (not shown) are provided on an end face of the drum 1. The washing fluid nozzles are arranged on the end face of the first four chambers 102, 103, 104, 105 which are completely closed radially outwards in the direction of rotation R. All chambers 100, 101, 102, 103, 104, 105, 106, 107, 108, 109 of the drum 1 are open on both end faces. A washing fluid is sprayed through the washing fluid nozzles with pressure over the open end faces through the chambers 102, 103, 104, 105 in the longitudinal direction L of the chambers 102, 103, 104, 105, so that they are arranged in the chambers 102, 103, 104, 105 Long profiles 5 are washed. The washing fluid flows out of the chambers 102, 103, 104, 105, which are likewise open on the opposite end faces, out of the chambers 102, 103, 104, 105. In the direction of rotation R, the washing nozzles are provided with drying fan nozzles on the end faces of the following brackets 106, 107, 108. The drying fan nozzles are provided on the end face of the last three chambers 107, 108 in front of the outlet opening 7 of the drum 1. The washing fluid can be water or water with additives, such as, for example, anticorrosive agents, oil or other additives: the washing fluid compositions of one drum 1 and the other drum 2 can be the same or different.

Each of the chambers 100, 101, 102, 103, 104, 105, 106, 107, 108, 109 of the drum 1 is laterally delimited by a leading lamella 4 and a trailing lamella 3. The height of the lamellae 3, 4 extends essentially in the radial direction. However, they have a slight inclination in the direction of rotation R, which makes it possible for the long profiles 5, which are round in cross section, preferably circular, to automatically roll out of the chamber 109 in the region of the discharge opening 7.

The film 21 can be a 1-6 mm thick, preferably 1-3 mm, particularly preferably exactly 3 mm thick plastic film, for example a polyethylene film. The film 21 is flexible, but not or only slightly elastic. The film 21 is cut essentially rectangular. Along each of the longitudinal edges 22, 23 of the film 21 running in the longitudinal direction L there is provided the tensioning support 24, 25 running along the entire longitudinal edge 22, 23. The tensioning supports 24, 25 are tensioning supports 24, 25 adapted in the longitudinal direction L to the length of the drum 1, into which the associated longitudinal edges 22, 23 of the film 21 are clamped or screwed or otherwise fastened.

In the Fig. 1 one longitudinal edge 22 of the film 21 is connected to the tensioning support 24, which is fixed in position relative to a frame 28 of the washing device, while the second longitudinal edge 23 of the film 21 is connected to the tensioning support 25 movable relative to the frame 28: the tensioning support 25 is fastened to a tensioner 26 , which clamps the film 21 along the transport path of the long profiles 5 under constant tension on the outer circumference of the drum 1, so that the film 21 rests on the outer slat edges 3a, 4a of the individual slats 3, 4 and the slats 3, 4 during the rotational movement of the Slide drum 1 on the inside over the film 21. In this case, however, the film 21 lies tightly and firmly on the lamellae 3, 4 due to the tension force exerted, so that the washing fluid flowing through the chambers 102, 103, 104, 105 does not come out laterally in the radial direction laterally via the lamella edges 3a, 4a Chambers 102, 103, 104, 105 can flow out.

In the Fig. 1 The washing device shown enables the first washing and drying in the drum 1 and the further washing and drying of the individual long profiles 5 in the further drum 2, which are then transported away from the washing device by a conveyor 40.

The second embodiment according to Fig. 2 is constructed in accordance with the first embodiment, the same reference symbols denote the same features.

However, each of the two foils 21, 30 is provided on both longitudinal edges 22, 23, 31, 32 with one of the tensioning carriers 24, 25, 33, 34, but the tensioning carriers 24, 25, 33, 34 of the two foils 21, 30 are coupled to the tensioner 26 or tensioners 27, 35, 36, so that, by combined adjustment of the two tensioners 26, 27 or 35, 36, each of the two drums 1, 2 displaces both the one and the further film 21, 30 over the one or the further drum 1, 2 along the respective circumferential direction is made possible, the film 21, 30 then once set in its angular position remaining fixed in position relative to the frame 28.

The two tensioners 26, 27 or 35, 36 of the film 21 or the further film 30 make it possible to lower the films 21, 30 at the respective outlet opening 7, 9 to such an extent and to make the outlet openings 7, 9 so narrow in their height that they are only slightly larger than the diameter of the long profile 5, so that the long profile 5 does not fall out of the chamber 109 of the drum 1 too early, but rather only rolls out of the chamber 109 of the drum at a very late point in time and onto the chamber 200 of the others Drum 2 is transferred or rolls out of chamber 210 of further drum 2 and is transferred to conveyor 40.

Reference list

1

drum

2nd

drum

3rd

Slat

3a

Slat edge

4th

Slat

4a

Slat edge

5

Long profile

6

Receiving opening

7

Dispensing opening

8th

Receiving opening

9

Dispensing opening

10th

Axis of rotation

11

Axis of rotation

21

foil

22

Long edge

23

Long edge

24th

Clamping beam

25th

Clamping beam

26

Stretcher

27

Stretcher

28

frame

30th

foil

31

Long edge

32

Long edge

33

Clamping beam

34

Clamping beam

35

Stretcher

36

Stretcher

40

Sponsor

100-109

Chambers

200-210

Chambers

L

Longitudinal direction

R

Direction of rotation

Claims (11)

1. Washing machine for longitudinal profiles (5), comprising a
   drum (1, 2) which can be rotated about a horizontal rotational axis (10, 11) with a plurality of receiving areas (101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210) which are arranged along the circumference of the drum laterally delimited by lamellas (3, 4), which are open in the radial direction, and into which the longitudinal profiles (5) can be inserted along a longitudinal direction (L), comprising a receiving opening (6, 8) for the longitudinal profiles (5), an outlet opening (7, 9) at a distance from the receiving opening (6, 8) in the rotational direction (R) of the drum (1, 2) for the longitudinal profiles (5), and a transport path which runs between the receiving opening (6, 8) and the outlet opening (7, 9) for the longitudinal profiles (5), comprising at least one washing fluid outlet by which the receiving areas (101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210) pass when the drum (1, 2) is rotating and out of which washing fluid flows into the currently passing receiving area (101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210), and in doing so washing the inserted longitudinal profile (5), and a flexible film (21, 30) which covers at least the receiving areas (101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210) passing by the washing fluid outlet, thereby directly contacting the lamellas (3, 4) of the passing receiving area (101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210) wherein at least one tensioning device (26, 27, 35, 36) which is arranged along a long edge (22, 23, 31, 32) of the film (21, 30) and produces a permanent pretension on the film (21, 30) during the rotation of the drum (1, 2) is formed characterised in that the film (21, 30) has on both long edges (22, 23, 31, 32) one of the tensioning devices (26, 27, 35, 36) which interact and by which the film (21, 30) is displaceable back and forth in the circumferential direction.
2. Washing machine according to claim 1, characterised in that the drum (1, 2) is mounted rotatably with respect to the film (21, 30).
3. Washing machine according to claim 1 or 2,
   characterised in that the film (21, 30) is tensioned around a section of the outer circumference of the drum (1, 2).
4. Washing machine according to claim 1, 2 or 3, characterised in that during the rotary movement of the drum (1, 2) the film (21, 30) directly contacts radially outer edges of the lamellas (3, 4) along the entire longitudinal extent of the lamellas (3, 4) of the passing receiving area (101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210).
5. Washing machine according to anyone of the preceding claims, characterised in that a long edge (22, 23, 31, 32) of the film (21, 30) is adjustable along the outlet opening (7, 9) in circumferential direction of the drum (1, 2) and determines a height of the outlet opening (7, 9) in the circumferential direction of the drum (1, 2).
6. Washing machine according to anyone of the preceding claims, characterised in that the at least one washing fluid outlet is arranged adjacent to the receiving opening (6, 8) in the direction of rotation (R) and at least one blow drying outlet is arranged adjacent to the at least one washing fluid outlet in the direction of rotation (R).
7. Washing machine according to anyone of the preceding claims, characterised in that the transport path is provided above the axis of rotation (10, 11) of the drum (1, 2).
8. Washing machine according to anyone of the preceding claims, characterised in that at least two drums (1, 2) are arranged adjacent to one another and enable an automatic transfer of the longitudinal profiles (5) from the drum (1) to the further drum (2), and the drum (1) is provided with a washing fluid and the further drum (2) is provided with a further washing fluid.
9. Washing machine according to anyone of the preceding claims, characterised in that the film (21, 20) is a plastic film, preferably a PE film, 1 to 6 mm thick.
10. Method of washing longitudinal profiles (5)
    longitudinal profiles (5) being inserted into receiving areas (101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210) which are delimited laterally by lamellas (3, 4) and are open in the radial direction, the longitudinal profiles (5) being transported along a transport path from a receiving opening (6, 8) for the longitudinal profiles (5) in a direction of rotation (R) of a drum (1, 2) to an outlet opening (7, 9) spaced apart from the receiving opening (6, 8), and during the rotation of the drum (1, 2) passing at least one washing fluid outlet, from which washing fluid flows out into the currently passing receiving areas (101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210) and in doing so washes the inserted longitudinal profile (5), and a flexible film (21, 30) being tensioned over at least the receiving areas (101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210) currently passing the washing fluid outlet and directly contacting the lamellas (3, 4) of the passing receiving area (101, 102, 103, 104, 105, 106, 107, 108, 109 or 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210) wherein at least one tension device is arranged along at least one long end (22, 23, 31, 32) of the film (21, 30) which produces a permanent pretension on the film during the rotation of the drum (1, 2) characterised in that the film (21, 30) has on both long edges (22, 23, 31, 32) one of the tensioning devices (26, 27, 35, 36) which interact and by which the film (21, 30) is displaceable back and forth in the circumferential direction.
11. Method according to claim 10, characterised in that the film (21, 30) is displaced relative to a frame (28) in the circumferential direction of the drum (1, 2), by combined adjustment of interacting tensioning devices (26, 27, 35, 36) arranged on both long edges (22, 23, 31, 32) of the films (21, 30).

Images