CS276760B6 - Device for attaching a cord-like drainage element - Google Patents

Abstract

The apparatus for attaching a drainage element (8) in a press for eliminating liquid from solid pressed material comprises a turn-lock fastener (16) by means of which the ends of the drainage element (8) are each detachably fastened to a pressure plate (5, 6) limiting the pressing chamber (7). In this arrangement, each end (22) of the drainage element (8) passes through a closure housing (18) fixedly arranged on the pressure plate (5, 6), terminating in a liquid collection chamber (12, 13) and bearing with its end face (37) on an end wall (14, 15) which limits the liquid collection chamber (12, 13). Since the closure housing (18) forms the stationary part of the turn-lock fastener (16), the forces acting on the pressure plate (5, 6) during the pressing operation are fully supported on the end wall (14, 15) so that the movable part of the turn-lock fastener (16) which is connected to the drainage element (8) remains free of restraints. <IMAGE>

Description

(57)

The device for fastening the strand drainage element (8) in a press for discharging liquid from solid pressed material consists of a screw cap (16) by which they are detachably fastened to one pressure plate (5, 6) delimiting the pressing space (7) of the drainage element end (8). In this case, the end (22) of the drainage element (8) passes through a closing sleeve (18) fixedly arranged on the pressure plate (5, 6), which opens into the liquid collecting space (12, 13) and abuts with its end face (37) on the end wall. (14, 15) bounding the liquid collecting space (12, 13). As the locking sleeve (18) forms a fixed part of the screw closure (16), the forces acting on the pressing plate (5, 6) are fully absorbed by the end wall (14, 15) during the pressing process so that the movable part of the screw closure (16) is continuous. with the drainage element (8) remains unloaded.

276 160 B6 ω

CS 276 760 B6

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a device for fastening a strand drainage element in a press for discharging liquid from solid pressed material, with a pressure plate disposed between the press space and the liquid collection space. pressure plate.

Devices of this kind are used in particular for fruit presses. The fruit press consists of a pressing container which is rotatably driven about a horizontal axis. In the press vessel there is a molded material between the sliding pressure plate and the support plate, which is pressed by axial stroke of the pressure plate. The liquid obtained is fed to the liquid collecting spaces by tubular, flexible drainage elements which are arranged between the pressure plate and the support plate.

The drainage elements are detachably fastened to the pressure plate and the support plate. The ends of the drainage elements extend through openings in the pressure plate and in the backing plate and each open into a respective liquid collecting space which is connected to the pressure plate and to the backing plate.

Each drainage element consists of a rod-like, flexible core made of rubber or other flexible material, the core having at its periphery grooved channels extending in the axial direction through which the juice obtained is drained. To filter the liquid, the core of the drainage element is provided with a liquid-permeable casing.

By means of the fastening device, the core together with the hosiery casing surrounding it is anchored to the pressure plate, so that the drainage elements are distributed in the axial direction of the pressing container in the retracted position of the pressure plates under light tension, while freely approaching the pressure plates laid in mash.

In one known device of the type mentioned above, each drainage element is fixed to the pressure plate by means of a screw cap. For this purpose, a closure sleeve is attached to the free end of the drainage element, which is fixedly connected to the flexible core and the filter wrapping which surrounds the core. The closure sleeve is provided at its end at the press space with a collar and a subsequent external thread which is screwed into the threaded hole of the pressure plate until the collar of the closure sleeve is firmly against the inside of the pressure plate towards the press space, thereby forming a detachable connection between the drainage element and pressure plate.

The juice produced during the pressing is discharged by longitudinal grooves arranged on the periphery of the flexible core through the closing sleeve into the liquid collecting space. The closure sleeve therefore constitutes, in this known embodiment, a movable part of the screw closure by which the drainage element is fastened to the pressure plate.

During assembly, one end of the drainage element with the closure sleeve is screwed first into one of the opposed pressure plates and then the other end into the other pressure plate. In order to support the thrust plates against the high axial forces occurring during the pressing, the ends of the drainage elements are guided up to the end wall delimiting the respective liquid collecting space of the container to which it faces with its faces.

A disadvantage of this known embodiment is that when the second end of the drainage element is screwed into the pressure plate, the flexible core of the drainage element rotates about its longitudinal axis. To prevent this, the drainage element must be rotated back a few turns before being screwed into the pressure plate. Time and expended energy for assembly and disassembly

200 drainage elements, i.e., 400 fastenings per press, are very high.

In addition, the loading of the thrust plates arising during the pressing process, when the thrust plates rest against the ends of the drainage elements against the end walls of the press container, leads to very high forces in the fastening of the screw caps. Due to the excessive clamping and deformation caused by them, the screw caps can often not be dismantled at all or only with great effort.

Another known device for fastening the drainage element to the pressure plate is designed as a quick-release fastener and also consists of a closing sleeve firmly connected to the free end of the drainage element, which is inserted into the through hole of the pressure plate and secured. The closure sleeve is further provided on its periphery with two shoulders which, when introduced into the corresponding recesses of the through hole and are rotated through 90 [deg.], Engage the thrust plate so that the closure sleeve is axially secured with the thrust plate.

To prevent unwanted rotation of the closure sleeve in the locked state, the collar of the closure sleeve is provided on the side of the press space with a spring loaded pin which is retractable and retractable from an opening in the pressure plate. The closure sleeves are rigidly connected via a support cone to the free end of the drainage element.

To accommodate the pressing forces acting on the thrust plate, the support cone is guided by the liquid collecting space and bears with its face on the front wall delimiting the liquid collecting space. Therefore, also in this embodiment, the closure sleeve is a movable part of the screw closure to which the pressing forces are transmitted. As a result, excessive stresses occur inside the screw cap which limit the function and make it difficult to change the drainage elements quickly.

SUMMARY OF THE INVENTION It is therefore an object of the invention to overcome the known disadvantages and to provide a device of the type mentioned above which guarantees the safe operation of the screw closure while absorbing the pressing forces acting on the press plate.

This object is achieved by a device for securing a strand drainage element in a press for discharging liquid from a solid molded material, with a pressure plate arranged between the press space and the liquid collection space to which the drainage element is secured by a screw closure. A closure sleeve is formed in the thrust plate, forming a screw closure with the closure member, and with its end extending into the liquid collecting space abutting a wall which delimits the liquid collecting space.

In order to facilitate the assembly and disassembly of the drainage element, the screw closure is designed as a bayonet closure.

A particularly advantageous construction of the bayonet closure consists of a closure member rigidly connected to the end of the drainage element provided with two 180 ° offset radial shoulders on its circumference, which engage two corresponding projections arranged on the inner wall of the closure sleeve.

Automatic, easily removable radial locking of the closure member with the closure sleeve is achieved by providing the end of the closure sleeve on the press space side with a circular groove on the outer periphery of the collar into which a snap ring is inserted. ring, passes through a radial hole in the collar of the sealing sleeve and removably fits into

CS 276 760 B6 of a cut provided on the outer periphery of the closure member, formed as a radial hole in the closure member.

To facilitate the unlocking process, the locking end of the locking ring is bent into a tab shape.

A sealable dismountable connection without play between the closure sleeve and the thrust plate is achieved by the closure sleeve abutting, with its collar on the front side, against the wall of the thrust plate on the side of the press space.

The advantages achieved by the device according to the invention are in particular that the pressing forces acting on the pressure plate via a fixed part firmly connected to the pressure plate of the screw closure are free of forces acting from the outside, which limit the function of the screw closure. With the screw closure according to the invention, the assembly and disassembly of the drainage element can be carried out quickly and effortlessly without the use of special tools.

The invention is described in more detail in the following description and drawings, which are exemplary embodiments, with the individual figures showing:

Fig. 1 is a schematic longitudinal section through a fruit press with flexible drainage elements; Fig. 2 is an enlarged longitudinal section through a fastening device according to the invention; Fig. 3 a section along line III-III by the fastening device of Fig. 2; Fig. 2 and Fig. 5 is a cross-sectional view along the line VV of Fig. 2.

The fruit press of FIG. 1 comprises a cylindrical press container 6 which is rotatably supported and driven about a horizontal axis 2. The pressing vessel 1 accommodates a pressing piston 3 which is an axially displaceable piston-cylinder unit 6. A pressure plate 5 is mounted on the front side of the pressing piston 6, which acts together with a pressure plate 6 provided at the other end of the pressing vessel 1, which receives the back pressure.

A plurality of flexible drainage elements 8 are disposed in the pressing space 2 between the pressure plates 5 and 6, the free end of which is always detachably fastened to the pressure plates 5 and 6. The drainage elements 8 serve to drain the precipitated liquid during the pressing process. For example, a 5,000 kg mash feed press has about 220 drainage elements 8.

Each drainage element 8 comprises a circular rod-shaped core 8 of rubber or other flexible material, which is wrapped with a liquid-permeable cover 10 (FIG. 2). The hosiery casing 10 surrounding the core 6 preferably consists of a textile material and acts as a filter on the effluent.

The core 9 is provided on its surface with longitudinally extending groove channels 11 along which liquid is passed through the casing 10 during the pressing process. The ends of the core 6, at the points of attachment, extend through the pressure plates 6, 6 and engage liquid collecting spaces 12 and 13 which attach to the pressure plates 6 and 6. The liquid collecting space 12 in the axial direction is delimited by the end wall 14 of the press container 1 and the liquid collecting space 13 by the end wall 15 of the pressing piston 3.

As can be seen in particular from FIG. 2, each drainage element 8 is detachably fastened at the ends to the pressure plates 5 and 6 by a screw cap 16. Further, the capsule 18 is screwed tightly into the threaded hole 17 in the pressure plate 6 or 6.

CS 276 760 B6

18, with the collar 19 abutting the pressing plate side 6 or 5 facing the pressing space 7, extends into the respective liquid collecting space 12 or 13 up to the inside of the end wall 14 or 15. The cylindrical inner space of the closure sleeve 18 serves for detachably mounting the closure part 20 which is rigidly connected to the end of the drainage element 8.

The closure member 20 is provided with a central through-hole 21 which widens conically in the direction of the liquid collecting space 12 or 13. A corresponding counter-cone is formed at the end of the drainage element j) on the sleeve 23 mounted on the free end 22 of the flexible core 9 under the liquid-permeable casing 10. The casing 10 is thereby firmly tensioned in the through hole 21 between the closure member 20 and the sleeve 23, which is made of rubber or other flexible material;

A support cone 24, also adapted to the conical through hole 21, is connected to the sleeve 23 and does not extend to the end of the flexible core 9 with which it is fixedly connected by means of a transverse pin 25.

By means of the sleeve 23, the core 9 and the casing 10 are held separately from one another within the closure member 20, so that the channels 11 for free passage of liquid through the wall remain free and secondly the flexibility of the drainage element 8 is guaranteed in the region of its outlet from the closure 20. at the end of the support cone 24, a plurality of openings 26 disposed on the closure sleeve 18 may flow into the liquid collecting space 12 or 13.

To axially secure the closure member 20 with the closure capsule 18, the closure member 20 is provided with two 180 ° offset radial shoulders 27 on its circumference, which, when closed, engage two corresponding projections 28 disposed on the inner wall of the closure capsule 18 to form a bayonet cap. The shoulders 27 begin with two lateral parallel faces 29 of the closure member 20 (FIG. 3).

By means of the pads 29 whose radial distance is slightly less than the clear width between the projections 28 of the capsule 18, the cap 20 is allowed to be guided in the unlocked pivot position into the cap 18 until the collar 30 of the cap 20 engages the collar 19 of the cap.

In this position, the shoulders 27 of the closure part 20 are inserted into the closure sleeve 18 so far that after the closure part 20 has been rotated 90 °, they lie behind the protrusions 28 of the closure sleeve 18 and secure them against the axial direction with the closure part.

To secure the closed screw closure 16 against undesired rotation of the closure part 20, the closure sleeve 18 is provided with a latching projection 31 which is detachably inserted in the secured position against rotation to the notch 32 of the closure part 20. The latching projection 31 is formed by the free end of the snap ring 33, which is inserted into a circular groove 34 disposed on the periphery of the collar 19 of the closure sleeve 18 (FIG. 5).

The end of the snap ring 33 forming the snap-in protrusion 31, wherein the snap ring 33 is preferably made of spring steel, is bent at right angles and extends through the radial bore 35 of the collar 15. The bore 35 is disposed on the periphery of one of two bosses 28 provided on the inner wall of the closure 18. Thus, the latching projection 51, somewhat protruding above the inner wall of the closure sleeve 1 leží, lies when the closure part 20 is inserted into the closure sleeve 18 in the region of the closure part flat 29, so that the insertion of the closure part 20 is prevented.

CS 276 760 B6

Upon insertion and rotation of the closure member 20 by 90 °, the latch projection 31 of the closure housing 18 automatically engages in a notch 32 of the closure portion 20. To release the latch projection 31 from the notch 32, the retaining ring 33 is bent into the tab 36 in the region of the latch projection 31. so that it can be lifted at this point with the aid of a finger or a screwdriver, thereby removing the latching projection 31 from the slot 32.

By returning and axially pulling off the closure piece 20 from the closure sleeve 18, the connection of the drainage element 6 can be made. with the pressure plate 11 or _6_without difficulty.

During the pressing process, due to the pressing pressure, very high forces were exerted on the pressure plates 6, 6. These forces were fully absorbed by the press receptacle 1 or the press piston 3 through the closure sleeve 48, which by its end face 37 abuts the inner face of the end wall 14 or 15, so that the movable parts of the screw closure 16 were not stressed. .

Claims (6)

PATENT CLAIMS An apparatus for attaching a strand drainage element in a press for discharging liquid from a solid molded material, with a thrust plate arranged between the press space and the liquid collection space to which the drainage element is secured by a screw closure, the drainage element having a lockable closing part passing A thrust plate, characterized in that a closure sleeve (18) is formed in the thrust plate (5, έ), forming a screw closure (16) with the closure part (20) and abutting on the liquid collecting space (12, 13) with the end a wall (14, 15) which delimits the liquid collecting space (12, 13). Device according to claim 1, characterized in that the screw closure (16) is designed as a bayonet closure. Device according to claim 2, characterized in that the bayonet closure consists of a closure part (20) firmly connected to the end of the drainage element (8) provided with two radially offset offsets (27) offset by 180 ° relative to one another. two corresponding projections (28) disposed on the inner wall of the closure sleeve (18). Device according to one of Claims 1 to 3, characterized in that, on the side of the pressing space (7), the end of the closure sleeve (18) is provided with an annular groove (34) on the outer circumference of the collar (19). (33), which passes through a radial bore (35) in the collar (19) of the closure sleeve (18) and detachably engages in a notch (32) provided with a latching projection (31) formed in a radially curved end of the snap ring (33) an outer periphery of the closure member (20) formed as a radial hole in the closure member (20). Device according to claim 4, characterized in that the end of the snap ring (33) on the snap-on side is bent in the shape of a handle (36). CS 276 760 B6 Device according to one of Claims 1 to 5, characterized in that the closure sleeve (18) bears on the face of the pressure plate (5, 6) on the side 1 of the suction chamber (7) with its collar (19).