Abstract
A pressing apparatus in a manner of a cage-type screw press, wherein the strainer cage is split up into a plurality of strainer-cage segments. The strainer-cage segments can be sealed along their adjacent sides with the aid of sealing devices so that liquids and solids are effectively prevented from escaping from the gaps between the strainer-cage segments.
Claims
1. A pressing apparatus, comprising: a cage frame for accommodating a strainer cage, wherein the strainer cage is split in a longitudinal direction into at least two strainer-cage segments: and, in each case, at least one sealing device is arranged in a region of contact surfaces of the strainer-cage segments, wherein the sealing device is configured to outwardly seal, as seen in the radial direction of the strainer cage, a gap which is present between the contact surfaces of two interconnected strainer-cage segments.
2. The pressing apparatus according to claim 1, wherein, in a region of a first of the strainer-cage segments, the sealing device has a first sealing strip that is deformable by forces bracing the contact surfaces of the two interconnected strainer-cage segments so that the gap which is present between the contact surfaces is sealed.
3. The pressing apparatus according to claim 2, wherein the first sealing strip of the sealing device projects from the contact surface of the first strainer-cage segment.
4. The pressing apparatus according to claim 2, wherein the first sealing strip is fixed in a form-fitting manner in a region of the contact surface of the first strainer-cage segment.
5. The pressing apparatus according to claim 2, wherein at least one of the strainer-cage segments has at least one recess or a groove in a region of the contact surface.
6. The pressing apparatus according to claim 5, wherein the first sealing strip of the sealing device projects from the contact surface of the first strainer-cage segment into the recess of the second strainer-cage segment so that when the strainer-cage segments are connected the first sealing strip is deformed to seal the gap located between the contact surfaces.
7. The pressing apparatus according to claim 6, wherein the first sealing strip projects from the contact surface of the first strainer-cage segment to an extent which is greater than a depth of the recess or groove in the region of the corresponding contact surface of the second strainer-cage segment.
8. The pressing apparatus according to claim 2, wherein the sealing device has a second sealing strip that is fixed in a form-fitting manner in a region of the contact surface of the second strainer-cage segment.
9. The pressing apparatus according to claim 2, further comprising a clamping bar arranged to fix the first sealing strip in the region of the contact surface of the strainer-cage segment.
10. The pressing apparatus according to claim 7, wherein the recess or groove is realized on or in a scraper and/or clamping bar arranged in the region of the contact surface of the second strainer-cage segment.
Description
BRIEF DESCRIPTION OF THE DRAWING
[0061] In the drawing:
[0062] FIG. 1: shows a perspective illustration of a cage frame of a pressing apparatus according to the invention in an open state, without cage bars inserted and without a pressing and feeding screw,
[0063] FIG. 2: shows a perspective illustration of a detail of a pressing apparatus according to the invention in the region of a contact surface of a strainer-cage segment, without cage bars inserted,
[0064] FIG. 3: shows a perspective illustration of a detail of a pressing apparatus according to the invention in the region of the contact surfaces of two strainer-cage segments prior to connection,
[0065] FIG. 4: shows a perspective illustration of a detail of a pressing apparatus according to the invention in the region of the contact surfaces of two interconnected strainer-cage segments, without cage bars inserted,
[0066] FIG. 5: shows a plan view of a first half of a cage frame with strainer-cage segments inserted into three strainer-cage portions, without cage bars inserted,
[0067] FIG. 6: shows a section taken in the region of a strainer-cage segment from FIG. 5,
[0068] FIG. 7: shows a detail of the strainer-cage segment from FIG. 6 in the region of the contact surfaces,
[0069] FIG. 8: shows a plan view of a second half of a cage frame with strainer-cage segments inserted into three strainer-cage portions, without cage bars inserted,
[0070] FIG. 9: shows a section taken in the region of a strainer-cage segment from FIG. 8,
[0071] FIG. 10: shows a detail of the strainer-cage segment from FIG. 9 in the region of the contact surfaces, and
[0072] FIG. 11: shows a perspective illustration of a cage frame of a pressing apparatus according to the invention in a closed state with cage bars inserted but without a pressing and feeding screw.
DETAILED DESCRIPTION OF THE INVENTION
[0073] FIG. 1 is a perspective illustration of a cage frame (2) of a pressing apparatus (1) according to the invention in an open state, without cage bars inserted and without a pressing and feeding screw. The cage frame (2) is split into an upper cage frame (2a) and a lower cage frame (2b), which each have a basic shape similar to half a hollow cylinder. The strainer cage, which can be inserted into the upper cage frame (2a) and the lower cage frame (2b), is split up in the longitudinal direction into a plurality of strainer-cage portions (3). Each strainer-cage portion (3) here is split into two strainer-cage segments (4), wherein in each case one strainer-cage segment (4) of a strainer-cage portion (3) is arranged in the respective upper or lower cage frame (2a, 2b).
[0074] Both the cage frame (2) and the strainer-cage segments (4) have contact surfaces (5), which, in a closed state of the strainer cage or of the cage frame (2), are adjacent to one another for the corresponding subassemblies. Furthermore, the strainer-cage segments (4) have clamping bars (6), which serve to fix cage bars (not illustrated) in the respective strainer-cage segment (4) and to fasten the respective strainer-cage segment (4) in the strainer cage or strainer-cage portion (3) on the cage frame (2). On the left-hand side of the lower strainer-cage segment (4) and on the right-side in the upper strainer-cage segment (4), scrapers, which project into the pressing chamber, are arranged on the clamping bars (6).
[0075] The pressing chamber, which is delimited by the strainer cage, has, on the end sides, a first opening (7), as an outlet or exit opening, and an entry opening (8) for the pressing material. An inlet shaft (not illustrated) is arranged in the region of the opening (8), and the pressing material can be fed into the strainer cage through said inlet shaft.
[0076] FIG. 2 shows a perspective illustration of a detail of a pressing apparatus (1) according to the invention in the region of a contact surface (5) of a strainer-cage segment (4), without cage bars inserted. A first sealing strip (10) of a sealing device (9) is arranged on the outer side of the clamping bar (6), as seen in the radial direction of the strainer cage. The clamping bar (6) has a respective recess (12, 13) in the outer region of the contact surface (5) and on the side which is located opposite the contact surface (5). Said recesses are realized, for example, by virtue of the edges of the clamping bar (6) being milled. The sealing strip (10) is arranged in the recesses (12, 13) so as to enclose the clamping bar (6) on the outer side. A first end of the sealing strip (10) is arranged in the recess (13), which is arranged on that side of the clamping bar (6) or of a scraper which is located opposite the contact surface (5). A second end of the sealing strip (10) is designed in a U-shaped manner and is arranged at least to some extent in the recess (12), which is arranged on the side of the contact surface (5). The closed side of the U-shaped, second end of the sealing strip (10) here projects from the recess (12). As an alternative to the clamping bar (6), use can be made of a scraper.
[0077] FIG. 3 illustrates a perspective view of a detail of a pressing apparatus (1) according to the invention in the region of the contact surfaces (5) of a first strainer-cage segment (4) and a second strainer-cage segment (4) prior to the strainer-cage segments (4) being connected to one another to form a strainer cage. Alongside the first sealing strip (10) of the first strainer-cage segment (4), the sealing device (9) has a second sealing strip (11) of the second strainer-cage segment (4), said second sealing strip being arranged in the region of that side of the clamping bar (6) which is located opposite the contact surface (5) and also on the outer side of the clamping bar (6) of the second strainer-cage segment (4). The recesses (12, 13) in the clamping bar (6) are formed here such that the sealing strips (10, 11) are fixed in a form-fitting manner in the region of the respective strainer-cage segment (4) by a respective recess (13). The U-shaped, second end of the first sealing strip (10) projects from the recess (12) in the clamping bar (6) of the first strainer-cage segment (4) into the region of the recess (12) of the clamping bar (6) of the second strainer-cage segment (4). The first sealing strip (10) here projects from the contact surface (5) to an extent which is greater than the depth of the corresponding recess (12) of the second strainer-cage segment (4).
[0078] FIG. 4 shows a perspective illustration of a detail of a pressing apparatus (1) according to the invention in the region of the contact surfaces (5) of the strainer-cage segments (4) from FIG. 3, wherein the first and the second strainer-cage segments (4) are connected to one another. A narrow gap 14 is formed between the contact surfaces (5) of the strainer-cage segments (4) and is sealed in the outward direction with the aid of the sealing device (9). The first sealing strip (10) of the sealing device (9) is deformed by those forces in the recesses (12) of the clamping bar (6) of the strainer-cage segments (4) which brace the contact surfaces (5) of the strainer-cage segments (4) against one another, such that the gap (14) is closed in the region of the sealing device (9).
[0079] FIG. 5 illustrates a plan view of a first half of a cage frame (2) with strainer-cage segments (4) inserted into three strainer-cage portions (3), without cage bars inserted.
[0080] FIG. 6 shows a section taken along section axis A-A in the region of a strainer-cage segment (4) from FIG. 5.
[0081] FIG. 7 illustrates a detail of the strainer-cage segment (4) from FIG. 6 in the region of the contact surfaces (5). The clamping bars (6) and/or scrapers (6a) have openings and are connected to the cage frame (2) with the aid of fastening means (15), which are arranged in the openings and are designed in the form of screws. On the outside, a respective first sealing strip (10) is fixed in a form-fitting manner with the aid of the clamping bars (6) and/or scrapers.
[0082] FIG. 8 shows a plan view of a second half of a cage frame (2) with strainer-cage segments (4) inserted into three strainer-cage portions (3), without cage bars inserted. Also evident, in particular, are the pressing-material entry (8) and an exit (17) for the pressing material, wherein the pressing material leaves the press in the form of a press cake.
[0083] FIG. 9 illustrates a section taken along section axis D-D in the region of a strainer-cage segment (4) from FIG. 8.
[0084] FIG. 10 shows a detail of the strainer-cage segment (4) from FIG. 9 in the region of the contact surfaces (5) of the strainer-cage segment (4). The clamping bars (6)/scrapers have openings and are connected to the cage frame (2) with the aid of fastening means (15), which are arranged in the openings and are designed in the form of screws. On the outside, a respective second sealing strip (10) is fixed in a form-fitting manner with the aid of the clamping bars (6)/scrapers. The recess (12) of the clamping bars (6), said recess being arranged in each case on the side of the contact surface (5), is free.
[0085] FIG. 11 is a perspective illustration of a cage frame (2) of a pressing apparatus (1) according to the invention in a closed state with cage bars (16) inserted in a strainer-cage portion (3), but without a pressing and feeding screw.
[0086] While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
