Disc filter

Abstract

1. A device 2. A device for treating fluids, at least consisting of a main body (10) with a fibrous structure and in the form of an at least partially fluid-permeable disc (12), which is provided with at least one first structure (13) which adopts a first orientation (20) on the main body (10), characterised in that the main body (10) has at least one further, second structure (21) which adopts a second orientation (24) on the main body (10), the second orientation being different from the first orientation (20) and / or, when having the same orientation, being laterally offset relative to the first structure (13).

Description

[0001] DISC FILTER

[0002] Furnishings

[0003] The invention relates to a device for treating fluids, at least consisting of a base body with a fibrous structure and in an at least partially fluid-permeable disc shape, which is provided with at least one first structure which assumes a first orientation on the base body.

[0004] EP 3 145 610 B1 discloses an oil filtration system comprising an oil filtration unit, an oil filter having a central opening extending along a central axis of the oil filter and having a filter material, - the oil filtration unit being provided with at least one first physical

[0005] Structure and has a non-circular first cross-sectional shape and a predefined longitudinal length with respect to the central axis of the oil filtration unit, the oil filter, which is provided with at least a second physical structure and has a non-circular second cross-sectional shape and a predefined longitudinal length with respect to the central axis of the oil filter, an inner periphery of the second physical structure arranged to connect to the outer periphery of the first physical structure, so that the oil filter is enabled to assume its correct insertion position in the oil filtration unit by the second physical structure, which at least partially surrounds the first physical structure,

[0006] - wherein at least one of the end surfaces of the oil filter with respect to the central axis of the oil filter comprises at least one second physical structure, and wherein the second physical structure forms part of the filter by comprising a filter material suitable for oil filtration, similar to the filter material of the oil filter and as such forms an active filtration component in the filtering process.

[0007] The known solution uses a stacked arrangement for the basic structure of the oil filter, consisting of individual, stacked or layered disc-shaped base bodies. Each disc-shaped base body in the stacked arrangement is provided with a structure on its opposite cover or disc surfaces, both of which have the same orientation or alignment relative to one another. In particular, in the aforementioned stacking sequence, adjacent base bodies can also be aligned such that the respective pairs of channel-shaped structures run perpendicular to one another, creating nodes that can impede the desired free fluid flow.

[0008] The respective disc-shaped base body consists of a filter medium made of cellulose material and can be used with particular advantage for separating water from hydraulic oils. In particular, the fibers of the cellulose material serve to absorb the water. When fully saturated, the filter can be replaced with a new one. Furthermore, the disc-shaped cellulose material can be used to separate various types of sludge, including varnish, from a fluid to be treated, especially a liquid. Based on this prior art, the invention is based on the object of further improving the known solutions in the prior art, in particular to improve the drainage behavior of disc-shaped filter or base bodies.

[0009] A device having the features of patent claim 1 in its entirety solves this problem.

[0010] The fact that, according to the characterizing part of patent claim 1, the base body has at least one further, second structure which adopts a second orientation on the base body that is different from the first orientation and / or which, provided with the same orientation, has a lateral offset from the first structure, ensures that adjacent structures of disc-shaped base bodies lying one above the other in the stacked assembly delimit free passages with one another, so that no bottlenecks or blocking points are formed that could impair fluid transport within the respective base body. This also applies in the case where adjacent base bodies of a disc or stack arrangement are randomly combined with one another in any statistical distribution.In any case, it is achieved with high statistical probability that, due to the different orientation or the offset mentioned, a fluid flow from an outer edge to an inner edge and vice versa is achieved for each basic body in a virtually trouble-free manner.

[0011] In a further preferred embodiment of the device according to the invention, it is provided that the first structure and the second structure for a base body are identical except for their respective different orientations and / or offset, in particular they form drainage channels of the same depth. In this way, the respective base body can be designed identically as a standardized component, which helps to reduce manufacturing costs. In a further preferred embodiment of the device according to the invention, it is provided that the respective structure extends over the entire disc surface of the disc-shaped base body up to an edge delimiting the structures on the circumferential side of the base body and an opening interrupting part of the structures and passing through the base body at a central point.Due to the edges or limitations mentioned above, a stable base body can be created despite the cellulose material used, which is particularly easy to handle during production.

[0012] In a further preferred embodiment of the device according to the invention, the base body has two opposing disc surfaces, one serving as the inflow side and the other as the outflow side for the fluid, and the structuring with the first and second structures is present equally on both disc surfaces. This provides relatively large areas for the fluid to flow through the base body.

[0013] In a further preferred embodiment of the device according to the invention, it is provided that the respective structuring on both disc surfaces of the base body is identical, with the proviso that, preferably at least in one orientation direction, the opposing structures have an offset from one another, which is preferably designed as a half pitch, corresponding to half the distance between two adjacent structures with this orientation direction. Due to the aforementioned offset, the respective structures in the surfaces of the disc-like base body are arranged opposite one another in such a way that a drainage channel on one side of the base body is supported by solid material on the other side, so that even when high fluid flow forces occur, the respective base body remains stable.In a further preferred embodiment of the device according to the invention, it is provided that all structures in the form of drainage channels are introduced as a depression in the base body. It is preferably further provided that the first and the separate second structures, as well as the third and fourth structures, are each perpendicular to one another and delimit protruding islands between them, the upper sides of which protrude above the base of the drainage channels. It is particularly preferably provided that the respective structuring on the respective disc surface of the base body creates a waffle or checkerboard pattern, with preferably square-shaped islands. Thanks to the resulting island pattern, a particularly uniform distribution of the respective fluid flow within the drainage channel arrangement formed by the individual structures is achieved.

[0014] In a further preferred embodiment of the device according to the invention, it is provided that, on the upstream side, the central opening of the base body is enclosed by an inner receiving channel that serves to receive the adhesive. Preferably, it is further provided that, on the downstream side, the edge bounding the structures has a further outer receiving channel that serves to receive the adhesive. By using a suitable adhesive, the respective device can even be produced largely automatically with other devices as a stacked assembly consisting of individual disc-shaped base body elements.

[0015] In another particularly preferred embodiment of the device according to the invention, two identically designed base bodies are connected or bonded to one another to form a disk stack in such a way that one base body is offset from the other base body by a predeterminable angular amount relative to a vertical or central axis. Due to the selected structures with their drainage channels, any pivoting angular offset results in an uninterrupted, energetically favorable fluid drainage flow through adjacent disk-like base bodies in the stacked assembly. This is a major advantage over known solutions that only recognize a defined offset of 90°.

[0016] In another particularly preferred embodiment of the device according to the invention, several disc packs are connected to one another by means of adhesive, forming a stack of packs as a tradable filter element. In this way, filter elements of almost any size can be prefabricated and used for suitable filter devices on the market.

[0017] In a further preferred embodiment of the device according to the invention, the adhesive bond forms a further additional structure, which, particularly in a spiral shape, is applied to the upstream side of a disk stack and at least partially overlies the structures there. By applying an additional adhesive structure, particularly in a spiral shape, optimal fluid flow can be achieved on the adjacent upper side with the drainage channels of the base body with minimal pressure and flow losses.

[0018] The invention also relates to a suitable method for producing a stack of packages on the basis of a device as described above.

[0019] In the following, the device according to the invention is explained in more detail using an exemplary embodiment according to the drawing. In this diagram, not to scale, the

[0020] Figure 1 shows in perspective the upper inflow side of a

[0021] Base body made of filter material, particularly in the form of cellulose; Figure 2 shows a perspective view of the opposite lower downstream side of the same base body according to Figure 1;

[0022] Figures 3 to 5 show various half-sectional views and views of the basic body according to Figures 1 and 2;

[0023] Figures 6 to 11 in the form of an exploded view show the assembly with individual devices for the purpose of producing a disc package according to Figure 11; and

[0024] Figure 12 is a longitudinal sectional view through a filter device with a stack of individual disc packs according to Figure 11, including the preceding manufacturing steps according to Figures 6 to 10.

[0025] Figure 1 shows the inflow side 8 of a device for treating fluids, comprising at least a base body 10 with a fibrous structure and in an at least partially fluid-permeable disc shape 12, in particular in the form of a circular disc. The fluid flow occurs from top to bottom as viewed in the direction of Figure 1. The base body 10 with the fibrous structure is formed in particular in one piece from a cellulose material, which can, if necessary, comprise other materials, such as intrinsically incorporated diatomaceous earth, and can alternatively or additionally be coated or flocked, for example with activated carbon particles. The cellulose material in question is particularly suitable for separating fluid media from one another, for example water from hydraulic oil, or for carrying out cleaning, for example separating sludges with a low particle content, including varnish, from liquids, such as process water.

[0026] As Figure 1 further shows, the base body 10 or the disc shape 12 has a first structure 13 which, with linear elements 14 arranged parallel to one another, completely extends through the inflow side 8 shown in Figure 1 except for a free central opening 16 with an associated inner edge 18. The respective first structure 13 with the aforementioned linear elements 14 in the form of fluid or drainage channels thus jointly assume a first orientation 20 on the base body 10 in two opposing directions according to the double arrow representation.

[0027] As can also be seen from Figure 2, the base body 10 has, on its outflow side 9 opposite the inflow side 8, with counter-flow from bottom to top, a further, second structure 21 which in turn forms linear elements 22 which run parallel to one another and adopt a second orientation 24 in opposite directions, which is perpendicular to the first orientation 20. The structures 13, 21 with their individual unit elements 14 and 22, respectively, in the form of the fluid or drainage channels mentioned, can also adopt a different orientation in the base body 10, so that the two orientations 20, 24 do not necessarily have to form right angles to one another. Preferably, in any case, the two orientations 20, 24 can form any desired angle to one another. Orientations in which the two orientations 20, 24 and thus the two structures 13, 21 with their unit elements 14 and 22, respectively,22 parallel to each other, as shown in the prior art, are thus avoided in any case.

[0028] As can be seen particularly from Figures 3 to 5, the respective first structure 13 can furthermore be combined with an additional third structure 26 on the inflow side 8, which with its orientation corresponds to the orientation 24 with the unit elements 22 of the second structure 21. Furthermore, the second structure 21 on the outflow side 9 of the base body 10 can be combined with a fourth structure 28, which in turn corresponds to the first structure 13 with the unit elements 14 and has the same orientation 20. As can be seen from the half-section or longitudinal section views according to Figures 3 to 5, the respective structuring 13 and 26 on the inflow side 8 or the second structure 21 with the fourth structure 28 on the outflow side 9 creates a waffle or checkerboard pattern 30 or 32, respectively, with islands 34 that are preferably formed squarely as a result.In this case, the respective structuring 13, 26; 21, 28 on the two opposite disc surfaces 36; 38 of the base body 10 can be the same, with the proviso that preferably at least in one orientation direction 20 or 24 the opposite structures 13, 26; 21, 28 have an offset 40 to one another which, as shown in Figure 4, is designed as a half pitch and corresponds to half the distance between two adjacent structures 13, 28 or 21, 26.

[0029] All structures 13, 21, 26, 28, with their respective linear elements 14 and 22, respectively, are incorporated in the form of fluid or drainage channels as respective recesses into the base body 10 along its two opposite disc surfaces 36, 38. In particular, the waffle or checkerboard pattern 30; 32 can be obtained as part of an embossing process or by successively depositing the cellulose fiber material into a negative mold (not shown) that is adapted to the positive mold of the base body 10. All linear elements 14, 22, respectively, the fluid or drainage channels, are all of the same design, in particular, they are all inserted to the same depth into the base body 10 with its two disc surfaces 36, 38, and the channel base is preferably tapered; however, it can also form a different groove shape, for example, with a rounded bottom (not shown).The free islands 34 of the respective waffle or checkerboard pattern 30, 32 protrude with their free frontal upper sides beyond the respective drainage channels at the edge and thus form a common upper or lower side for the base body 10. The respective structure 13, 26; 21, 28 extends over the entire respective disc surface 36; 38 of the disc-shaped base body 10 up to an edge 42 on its outer peripheral side that borders the base body 10 to the outside and up to an opening that interrupts at least part of the structures 13, 26; 21, 28, in particular in the form of a central opening 16 that completely penetrates the base body 10 at a central point. Furthermore, on the inflow side 8, the central opening 16 of the base body 10 is surrounded by an inner, groove-shaped receiving channel 44 that serves to receive adhesive.Commercially available adhesives, particularly polymer adhesives, can be used as the adhesive. As can also be seen from Figure 4, on the downstream side 9, the peripheral edge 42 bordering the respective structures 21, 28 has a further outer, circumferential receiving channel 46, which, like the receiving channel 44, serves to receive a suitable adhesive. The respective receiving channel 46 is formed at the edge as a circumferential groove in the lower, flat disc surface 38 of the base body 10.

[0030] As can further be seen from Figures 7 to 9, two identically designed base bodies 10 are connected or glued to one another to form a disc pack 48 in such a way that one base body 10 is offset from the adjacent base body 10 by a predeterminable angular amount, in the present case 45°, with respect to a vertical vertical or central axis. For this purpose, the base body 10, as shown in Figure 3, is placed flat from above with its inflow side 8 onto the disc-shaped base body 10 according to Figure 4, with the proviso that the base body 10 according to Figure 4 is first rotated about a transverse axis into a position according to Figure 2 in such a way that the annular receiving channel 46 according to Figure 7 is then at the top.Furthermore, the linear elements 14 of the first structure 13 are offset from one another by the aforementioned angular amount of 45° radially around the vertical or central axis relative to the linear elements 22 of the second structure 21, and thus also the associated linear elements 22 of the third structure 26 for the upper base body 10 and the linear elements 14 of the fourth structure 28 for the lower base body 10. Accordingly, the third and fourth structures 26 and 28 of the upper base body 10 and the lower base body 10 are arranged offset by 90° relative to the adjacent, opposite structure 13 and 21, respectively, as shown in Figures 7 to 9.Due to the offset arrangement of 45°, the adjacent eluid or drainage channels of the upper and lower base body 10 essentially form a continuously flowable, uniform fluid network, so that according to the sectional view according to Figure 9, the opposing edges 50 of both base bodies 10 continuously delimit a fluid flow space with the intersecting fluid or drainage channels, which nevertheless release the fluid path and are introduced via the respective structure 13, 26; 21, 28.

[0031] As further shown in Figure 11, several disc packs 48, as shown in Figure 9, can be arranged one above the other with virtually any stack height to form a pack stack 52. This creates a tradable, replaceable filter element 54 as shown in Figure 12.

[0032] According to the illustration in Figure 10, an adhesive bond can form a further additional fifth structure 56, which, in particular, is applied in a spiral shape on the inflow side 8 of a disk pack 48, at least partially overlying the adjacent structures 13, 21, wherein the spiral shape extends from the inner annular receiving channel 44 and widens outwards towards the respective outer edge 42. This results in improved inflow behavior when the disk-like base body 10 flows from the outside to the inside as shown in Figure 10, so that an overall uniform and unobstructed directed spiral fluid flow is achieved over the entire height between disk packs 48 or within the pack stack 52. As a further degree of freedom in the adhesive bond, a dot or star pattern can also be used instead of the spiral shape. Other adhesive shapes are possible.

[0033] The following describes in detail the method for producing a stack of packages 52 based on a device as described above. The following steps take place in sequential order:

[0034] - First, a base body 10 is aligned with its inflow side 8 facing upwards and prepared as shown in Figure 6. An adhesive is then introduced into the further outer receiving channel 46 of the outer edge 42 of a further base body 10, as shown in Figure 7, which outer edge delimits the structures 21, 28. The further base body 10 according to Figure 7, with its outflow side 9 facing upwards, is aligned concentrically at a predeterminable angle to a fictitious central or vertical axis, preferably of 45°, offset from the first upper base body 10 according to Figure 6.

[0035] Glue the second base body 10 according to Figure 7 to the first base body 10 according to Figure 6 by means of the adhesive located in the further outer receiving channel 46 to form a disc package 48 according to Figure 8.

[0036] - Then, as shown in Figure 9, prepare the finished disc package 48 with its inflow side 8 facing upwards and introduce an adhesive into the inner receiving channel 44 delimiting the central opening 16.

[0037] According to the illustration in Figure 10, preferably or alternatively, a further adhesive bond can be applied as a fifth additional structure 56, which is again arranged on the inflow side 8 of the disc pack 48 in the spiral shape shown, extending from the adhesive located in the inner receiving channel 44 outwardly toward the outer edge 42. The additional structure 56 improves the flow behavior within the adjacent disc packs 48; however, this design is not mandatory.

[0038] - Subsequently, the disc pack 48 is aligned according to Figure 10, specifically concentrically to a subsequent disc pack 48. The two disc packs 48 are then glued together, preferably by means of the further additional adhesive structure 56 and / or by means of the adhesive in the inner receiving channel 44, such that an upper inflow side 8 of one disc pack 48 is adhesively connected to an adjacent upper inflow side 8 of the subsequent disc pack 48; a composite as is the subject of the illustration according to Figure 11.

[0039] - Finally, in a further step, individual disc packs 48 are connected to one another in a predeterminable number and stacking sequence as shown in Figure 11, so that a pack stack 52 is produced as a tradable filter element 54, as is accommodated in a device according to Figure 12.

[0040] Figure 12 shows, in the form of a longitudinal section, part of a device housing 66 with a lateral inlet 58 for an unfiltered stream and a bottom-side central outlet 60 for the filtrate stream. The stack of packs 52 forming the filter element 54 is held between two element caps 62, 64, which are components of the replaceable filter element 54. The fluid flows through the respective base body 10 from the outside to the inside, and the fluid stream is cleaned or treated in the process. The cleaned fluid then exits the device housing 66 via the respective central openings 16 of each base body 10, which are aligned with one another, on the outlet 60 side of the device housing 66. The device housing 66 has a cover 68 that can be removed by means of a screw connection and, after removal, enables the filter element 54 to be replaced with a new element.Furthermore, the cover 68 has an internally located annular contact or connecting piece 70 which, when the cover 68 is fixed, allows the transmission of a contact force from the cover 68 in the direction of the bottom-side receptacle 72 for the filter element 54, so that the latter is held in an inherently stable manner in the device housing despite the use of inherently flexible cellulose material for the base body 10.

Claims

Patent claims 1 . Device for treating fluids, comprising at least a base body (10) with a fibrous structure and in an at least partially fluid-permeable disc shape (12), which is provided with at least one first structure (13) which assumes a first orientation (20) on the base body (10), characterized in that the base body (10) has at least one further, second structure (21) which assumes a second orientation (24) on the base body (10), which is different from the first orientation (20) and / or, provided with the same orientation, has a lateral offset (40) to the first structure (13).

2. Device according to claim 1, characterized in that the first structure (13) and the second structure (21) for a base body (10) are the same except for their respective different orientations (20, 24) and / or the offset (40), in particular they form drainage channels of the same depth.

3. Device according to claim 1 or 2, characterized in that the respective structure (13, 26; 21, 28) extends over the entire disc surface (36; 38) of the disc-shaped base body (10) up to an edge (42) which delimits the structures (13, 26; 21, 28) on the peripheral side of the base body (10) and an opening (16) which interrupts part of the structures (13, 26; 21, 28) and passes through the base body (10) at a central point.

4. Device according to one of the preceding claims, characterized in that the base body (10) has two opposite disc surfaces (36, 38), which serve once as an inflow side (8) and once as an outflow side (9) for the fluid and that the Structuring with the first (13) and the second structure (21) is equally present on each disc surface (36, 38).

5. Device according to one of the preceding claims, characterized in that the respective structuring (13, 26; 21, 28) on both disc surfaces (36, 38) of the base body (10) is the same, with the proviso that preferably at least in one orientation direction (20, 24) the opposing structures (13, 26; 21, 28) have the offset (40) to one another, which is preferably designed as a half division, corresponds to half the distance between two adjacent structures (13, 26; 21, 28) with this orientation direction (20, 24).

6. Device according to one of the preceding claims, characterized in that all structures (13, 26; 21, 28) in the manner of drainage channels are introduced as a recess in the base body (10).

7. Device according to one of the preceding claims, characterized in that the first (13) and the second structures (21) separated therefrom as well as the third (26) and fourth structures (28) are each perpendicular to one another and delimit between them projecting islands (34) which project with their upper side above the bottom of the drainage channels.

8. Device according to one of the preceding claims, characterized in that the respective structuring (13, 26; 21, 28) on the respective disc surface (36, 38) of the base body (10) produces a waffle or checkerboard pattern (30, 32), preferably with square-shaped islands (34).

9. Device according to one of the preceding claims, characterized in that on the inflow side (8) the central opening (16) of the base body (10) is surrounded by an inner receiving channel (44) which serves to receive adhesive.

10. Device according to one of the preceding claims, characterized in that on the downstream side (9) the edge (42) delimiting the structures (21, 28) has a further outer receiving channel (46) which serves to receive adhesive. 11 . Device according to one of the preceding claims, characterized in that two identically designed base bodies (10) are connected or glued to one another to form a disc package (48) in such a way that one base body (10) is offset from the other base body (10) by a predeterminable, arbitrary angular amount with respect to a vertical or central axis.

12. Device according to one of the preceding claims, characterized in that several disc packs (48) are connected one behind the other by means of an adhesive bond to form a pack stack (52) as a tradable filter element (54).

13. Device according to one of the preceding claims, characterized in that the adhesive bond forms a further additional structure (56) which, in particular in spiral form, is mounted on the inflow side (8) of a disc pack (48) and at least partially overlies the structures (13, 26) there.

14. A method for producing a stack of packages (52) based on a device according to one of the preceding claims, characterized characterized in that the following Manufacturing steps take place: - a base body (10), with its inflow side (8) facing upwards, is provided, Introducing an adhesive into the further outer receiving channel (46) of the outer edge (42) of a further base body (10) delimiting the structures (21, 28), - align the further base body (10) with its outflow side (9) pointing upwards concentrically and offset by a predeterminable angle to the central or vertical axis, preferably 45°, relative to the first base body (10), and bond it to the first base body (10) by means of the adhesive of the further base body (10) located in the further outer receiving channel (46) to form the disc package (48), - Position the disc pack (48) with its inflow side (8) facing upwards, Introducing an adhesive into the inner receiving channel (44) defining the central opening (16), - preferably or alternatively applying a further adhesive as a further additional structure (56) on the inflow side (8) of the disc pack (48), preferably in spiral form, starting from the adhesive located in the inner receiving channel (44), - Aligning the disc pack (48) concentrically to the following disc pack (48), and - Bonding the two disc packs (48) to one another, preferably by means of the further additional adhesive structure (56) and / or by means of the adhesive in the inner receiving channel (44) in such a way that an upper inflow side (8) of one disc pack (48) comes into adhesive connection with an upper inflow side (8) of the subsequent disc pack (48).

15. Method according to claim 14, characterized in that the following manufacturing step takes place in a further successive sequence: - Connecting a predeterminable number of disc packages (48) to form a package stack (52) in the manner of a tradable filter element (54) is completed.

Images