DE3217407A1 - Filter press - Google Patents

Abstract

A filter press is provided with a support frame which has an at least approximately horizontal longitudinal beam on which a multiplicity of filter plates having intermediate filter cloths are suspended one after the other and moveable via support arms, and with at least one trolley, moveable in a guide, having catches for sequentially separating and moving the filter plates. A locking member, which can be introduced between the filter plate to be transported and the filter plate lying adjacent thereto, prevents the co-transport of the second filter plate. The locking member is arranged on a slide member connected to the trolley, which slide member can be moved in an essentially horizontal direction compared to the trolley and which is under tension in relation to the transport direction of the filter plate.

Description

Schenk-Filterbau GmbH
Bettringerstr. 42
7076 Waldstetten

Filter press

The invention relates to a filter press in the preamble of claim 1 described in more detail types

Such a filter press has several filter plates arranged one behind the other with filter cloths in between in which e.g. a suspension is filtered, washed and compressed into a solid filter cake and is dried. For removing the filter cake and for The filter plates are cleaned one at a time shifted by a certain distance (working space).

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This begins at the front end of the filter plate pack. During the shift, the filter cake can loosen and fall down. Then can If necessary, each filter plate can be cleaned, e.g. using a filter cloth washing device.

Carriages are used to transport the filter plates, one generally being arranged on each side and the two carriages are driven synchronously »The carriages grip the one furthest forward lying filter plate and move it by a certain distance.

Filter presses of this type with trolleys are e.g. in DE-OS 30 25 733 and European patent application no. 0 002 101 described.

The device described in: DE-OS 30 25 733 is used preferably for the transport of large filter plates. To avoid pendulum oscillations due to the filter plates sticking together, there are two carriages provided, with one car moving cyclically from filter plate to filter plate and the other car to separate the in each case foremost filter plate from the remaining filter plates and serves to move them. /

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A similar construction is described in European Patent Application No. 0 002 101. One serves here Carriage for the transport of the foremost filter plate, while the other carriage carries a locking member, that can be inserted between the filter plate to be transported and the filter plate located next to it and that is to prevent the transport of this filter plate.

The disadvantage of this device, however, is that a separate drive is required in each case for the second car, which is to the each first car must be synchronized. This solution is therefore more cumbersome and complex. Furthermore there is a brief overlap at the beginning of the separating movement at which the locking member is not yet engaged is. In this way there is a risk that the second plate or the position of the plate can also be moved remaining filter plates is shifted so that the locking member may not engage properly.

The present invention is therefore based on the object of creating a filter press of the type mentioned at the beginning, with which a reliable separation of the frontmost filter plate from the rest is ensured in a simple manner is and Lei the filter plate can be transported easily and without great effort.

According to the invention, this object is achieved by the in the characterizing Part of claim 1 mentioned features solved.

In the filter press according to the invention there is only one ■ Single carriage required or, if necessary, one on each side of the filter plates, but both can be coupled with each other and each perform the same movements together. With a corresponding Design of the filter press and arrangement of the carriage, if necessary, only a single carriage can be used.

The carriage according to the invention now takes on both the transport of the foremost filter plate as well the retention function for the adjacent filter plate. The two drivers get the Transport, while the locking member arranged on the sliding member holds back the filter plate lying next to it. For this purpose, according to the invention, the sliding member is movable relative to the carriage and preloaded in the specified manner. This means when the The sliding carriage is attached to the foremost filter plate.

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member biased so that it is with a corresponding force against the adjacent to the first filter plate Filter plate presses. Then the foremost plate of the filter plate pack is then subsequently moved by the driver pushed away, the pressing force still acts for a certain time through the prestressed sliding member, so that the second filter plate is securely retained.

This contact pressure already during the approach of the carriage can cause misalignments of the second filter plate or possibly the entire filter package can even be compensated, because this is done accordingly by the locking member can be adjusted.

In an embodiment of the invention it can be provided that the sliding member is a cylinder attached to the carriage has, in which a reference to the Tt.ansportrich-direction pretensionable piston is guided, at whose front free end protruding from the cylinder, the locking member is arranged is. The preload between the cylinder and the piston can be achieved by a spring-like device can be achieved through which the piston is subjected to a force against the transport direction of a filter plate.

The locking member can be designed as a tiltable claw with a rear stop lug and a front lug, wherein the front nose erects a rear stop nose when driving under the filter plate to be transported, which strikes the second filter plate on its front.

In this way a simple reluctance becomes the second plate reached. If all the filter plates are shifted, the problem arises in which way the Carriage, which has a protruding locking member and also protruding driver, into its basic position comes back behind the transported filter plates.

In a further very advantageous and not obvious embodiment of the invention, it is provided for this purpose that the carriage returns to its home position on a second path after all panels have been transported. This second path can be located under the guideway for the carriage for transporting the filter plates in the form of a second guideway are located, each in the area of the front and rear ends of the guideways switch-like facilities are provided.

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For this purpose, the carriage can be provided with rollers that to transport the filter plates are guided on an upper guide track in a chain case and the for the way back are guided on a lower guide track in the chain case, the lower guide track at the front end is longer than the upper guideway and at the rear end a ramp from the lower one leads to the upper guideway, which is used for the run of the Carriage for transporting the filter plates can be bridged.

The bridging of the ramp for a renewed transport to open the filter plates after a previous one Filtration can be done in several ways <> For this purpose, e.g. a movable flap can be arranged above the opening caused by the ramp, which is provided by can be raised from the bottom while the carriage is moving backwards and then covers the opening again

The carriage can be transported by a simple conveyor chain - as is known per se - wherein the driver guide on the carriage has an elongated hole extending in the vertical direction, that is so long that a driving pin as a

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receiving device in the elongated hole both during the The barrel of the carriage engages in the upper guide way as well as in the lower guide way.

Further advantages and inventive developments of the Filter press results in principle from the subclaims and from the following with reference to the drawing described embodiment.

It shows:

Fig. 1 is a perspective view of a filter

press in schematic diagram;

Fig. 2-5 Different positions of the carriage

for transporting the filter plates in enlarged side view;

Fig. 6 A perspective view with all

Filter plates in their shifted position and the carriage in the return position, with the front cover wall of the chain case is removed;

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7 shows a cross section through the chain case

in principle representation (enlarged);

FIG. 8 A view in the direction of arrow A in FIG.

7th

The filter press is constructed in the usual way, which is why only the parts essential for the invention below are described in more detail.

The filter press has a plurality of filter plates 1 lying one behind the other, which are attached to a support frame with at least two approximately horizontal longitudinal members 2 and 3 suspended on both sides via lateral support arms 4 are. The filter plates have cavities, grooves and grooves (not shown in detail) and an inlet opening 5 and one or more drainage openings 6 for liquid. Filter cloths are not shown between the individual filter plates and in front of the cavities, grooves and grooves arranged. The drainage takes place from the inlet 5 through the filter cloths to the drainage openings 6th

For filtering, the filter plates 1 are between a fixed cover 7 and a loose cover 8 in a known manner

Way combined into a filter plate package, with the compression takes place by a corresponding displacement of the loose cover 8 via a pre-piston 9.

The transport system for the panels essentially consists each of a carriage 10, which are moved on both sides on the outside of the longitudinal beams 2 and 3 in guide tracks. The two carriages 10 can with Can be shifted synchronously to each other with the help of a synchronous shaft, whereby the drive can take place hydrostatically. Reversal processes can be initiated depending on the pressure via an oscillating valve.

After the filtering process and after opening the filter press by appropriately pulling back the loose cover 8, the two carriages 10 are moved from a basic position moved out towards the plate pack. This position is shown in Fig.1.

In Figures 2 to 5 there are now different positions a carriage 10 during the transport of the filter plates and the structure of the carriage itself shown in more detail.

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In the carriage 10 are a front driver 11 and a rear driver 12 is arranged at a small distance from one another, the distance being slightly larger is than the width of a support arm 4. Both drivers 11 and 12 are each provided with a spring 13 and 14, respectively, generates the force directed upwards on the driver. For this purpose, the two springs are supported in the Carriage 10. The front driver 11 has a bevel on its front side, the filter plates 1 under f ah reiden 15, while the rear driver has a bevel on its rear side 16. Still owns the driver 12 has an upper horizontal surface 17, the width of which in the transport direction is slightly larger is than the distance a between the support arms of two adjacent filter plates. The purpose of this design becomes clear below with reference to FIG. 5.

A sliding member is also arranged on the carriage, which is firmly connected to the carriage 10 Cylinder 18 and a piston 19 which is displaceable relative to the cylinder and thus to the carriage 10. At the front end of the piston 19, which can have the shape of a simple rod, is a holding member

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20 attached in the form of an elbow. On the holding member 20, a claw 21 is arranged, which is mounted in the holding member 20 about a horizontal axis is tiltable. The claw 21 has a front nose 22 and a rear stop nose 23.

A spring 24 is stretched between the rear end of the piston 19 and a wall of the cylinder 18 Instead of the spring 24, another spring-like device can also be used. Is essential only that a force is exerted on the piston rod 19, which the piston in a fully extended Position (Fig. 2) holds under pretension, or a counterforce against an insertion of the piston 19 in represents the cylinder 18.

The mode of operation will now be described below with reference to FIGS of the filter plate transport explained.

The carriage 10 approaches with the filter press open from the direction of the arrow (Fig. 2) of the foremost filter plate 1. First the claw 21 hits the foremost filter plate 1, causing it to hit the front one

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Nose 22 is tilted on the support arm 4 about the horizontal axis, so that the rear stop lug 23 pivots into the space between the two adjacent support arms 4 of two filter plates 1 lying one behind the other in the direction of the arrow. The stop lug 23 thus forms a stop and during the further forward movement of the carriage 10, the piston 19 is pushed into the cylinder 18 against the force of the spring 24. The second filter plate 1 is thus subjected to a pressing force via the stop lug 23, with which any misalignments can be compensated. This position is shown in * of FIG. 3.

During the further forward movement of the carriage 10, the front driver 11 slides due to the bevel 15 through under the first support arm 4 and then straightened out due to the pretension by the spring 13 in the space between two support arms 4 again. The holding member 20 with its claw 21 is on the side arranged next to the two drivers 11 and 12, so that the piston 19 can easily be retracted even further can. At a corresponding distance from the driver 11, the driver 12 is arranged, which, however, is opposite

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to the driver 11 is in its geometric shape. In this way, the driver 12 cannot move under the support arm 4 of the front filter plate, but rather runs on.

■ This run-up means for the drive of the carriage 10 driving against a firm resistance. This immediately causes an increase in torque or a Pressure rise in the supply line of a hydraulic motor. It switches on when a specified pressure level is reached Oscillating valve automatically reverses so that the hydraulic motor is reversed. By reversing the drive the carriage is moved back, with the support arm between the drivers 11 and 12 on each side 4 of the front filter plate is held o

For perfect functioning of the plate transport device and the piston 19 is also used to pull the foremost filter plate away from the filter plate pack the holding member 20 and the claw 21 pivotably arranged thereon. In the position shown in FIG the piston 19 is completely in its retracted position. The force of the spring 24 is to be chosen so that not

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by tensioning the piston 19, the oscillating valve is reversed prematurely done. If the carriage 10 is now moved in the direction of the arrow according to FIG. 4, then - as mentioned - The foremost filter plate 1 taken along and the filter plate lying next to it still due to the Pretensioning of the piston 19 on the filter plate pack held. In this way it is prevented that due a sticking together of filter cloths the second filter plate is carried away. Only after one corresponding path of the carriage 10 when the piston has been pushed out again due to the force of the spring 24, the claw 21 is released from the second filter plate. However, this takes place at such a large distance that it is ensured that the first filter plate from the second filter plate has been cleanly separated.

In FIG. 5, the position of the carriage while the filter plates are being deposited on the loose cover 8 is shown. The displacement path is denoted by Ar. For reasons of clarity, the cylinder 18 and the piston 19 is not shown. When the transported filter plate hits the loose cover 8 or on a filter plate already placed there can be due to

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the bevel 16 now the driver 12 slide under the support arm h of the already deposited filter plate 1 or an arm 25 of the loose cover 8. The driver 11, on the other hand, runs up and thus again causes a pressure increase in the hydraulic motor, which leads to a reversal of the oscillating valve in the same way as described above. As a result, the direction of movement of the carriage is reversed and it travels again in the direction of the plate pack to repeat the transport cycle until the entire plate pack is displaced. So that the driver 12 cannot snap into place between two support arms 4, its horizontal surface 17 on the upper side is slightly wider than the distance between two support arms 4 lying next to one another.

At the end of the cleaning of all the filter plates 1, the carriage must move past the filter plates into its basic position be retracted.

The construction for this is shown in principle in FIGS. 6 to 8. The carriage 10 is for transport the filter plates 1 are guided in an upper guide track 26 in a chain case 27. Rollers are used for this purpose

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which are arranged on the underside of the carriage 10 are. The lateral guidance of the carriage 10 takes place between rollers 29.

Below the upper guide track 26 is a lower guide track 30 arranged in the chain case 27, the bottom of the chain case 27 in a simple manner Can form guideway. The carriage is carried along by a chain 31, which can circulate endlessly via a driver pin 32 which is in a driver guide 33 engages, which is arranged on the underside of the carriage 10. The driver guide 33 is represents a kind of driving lug which has an elongated hole or slot 34, which extends in the vertical direction and is so long that the driver pin 32 is in the slot

3H- is when the carriage is moved on the upper track 26 or on the lower track 30. If the carriage 10 is found in the upper guide 26, the driver pin 32 is located in the lower region of the slot 34 (see FIG. 8). If, on the other hand, it is in the lower guide track 30 (shown in dashed lines in FIG. 8), the driver pin 32 is in the upper region of the slot 34 _O

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In Fig. 6, the position of the carriage 10 is during his way back on the lower track 30, where he passes under the support arms 4 of the filter plates.

'The carriage 10 has reached this position in that after the last filter plate has been transported, it has moved forward all the way to the front (to the left in FIG. 6). there the upper guide track 26 ends and the carriage 10 "falls" down onto the lower track 30, in which it then returns (to the right in FIG. 6). At the end of the lower track 30 a ramp 35 is provided, Via which the carriage 10 is moved back up onto the upper guide track 26. It will a flap 36, which otherwise is the opening above the ramp

35 covered, raised and then the flap falls

36 back down and thus covers the opening so that the carriage 10 is back on the upper guide track 26 can be moved forward for a new disk cleaning cycle.

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The transport system according to the invention for the filter plates is suitable for chamber filter presses, frame filter presses and membrane filter presses. It's very easy under construction and does not require any sensors or switching elements. In addition, it can be made of corrosion-resistant and robust parts. Another advantage is that it is maintenance free and conventional Systems can be easily retrofitted.

The return of the carriage according to the invention via the lower guide track can also be designed in a simple manner in such a way that, for example, a transition to the lower level is also possible during the transport of the filter plate. In this way, the cleaning, which takes a long time with 100 or more plates, can be interrupted as required _o For this purpose, it is only necessary to provide appropriate lowering devices, e.g. on the chassis of the carriage or corresponding flaps in the upper runway that open to lower the carriage will.

Claims (12)

PATENT LAWYER - ·· DIPL.-ING. WERNER LORENZ Fasanenstrasse 7 D-7920 Heidenheim Heidenheim, 04/01/1982 File: SCH 887 Applicant: Schenk-Filterbau GmbH Bettringerstr. 42 7076 Waldstetten PATENT CLAIMS )) Filter press with a support frame which has at least approximately horizontal longitudinal members on which A large number of filter plates with filter cloths in between, one behind the other and movable are suspended via support arms, with at least one carriage movable in a guide for cyclical use Separating from each other and moving the filter plates over two interacting ones on the carriage Copy arranged drivers between which a filter plate is located for transport and with a locking member, that can be inserted between the filter plate to be transported and the filter plate located next to it and prevents the transport of this filter plate characterized in that the locking member (21) on one with the carriage (10) connected sliding member (15) is arranged, which is substantially opposite in the horizontal direction the carriage is displaceable and which is pretensioned in relation to the transport direction of the filter plate (1) is· 2) filter press according to claim 1 characterized in that the sliding member is attached to a carriage (10) Has cylinder (18) in which a piston which can be prestressed with respect to the transport direction (19) is guided, at whose front free end protruding from the cylinder, the locking member (21) is arranged is" - 3 - 3) filter press according to claim 2 characterized in that between the piston (19) and the cylinder (18) a Spring-like device (24) is arranged in such a way that the piston (19) exerts a force against the direction of transport the filter plates (1) is exposed. 4) Filter press according to claim 2 or 3, characterized in that In the front area .des piston (19) a holding member (20) is attached to which a locking member tiltable claw (21) with a rear stop nose (23) and a front nose (22) is arranged, the front nose (22) when driving under the to transporting filter plate (1) erects a rear stop lug (23) which is attached to the to transporting filter plate adjacent filter plate strikes on the front side. 5) Filter press according to one of claims 1-4, characterized in that " the front driver (11), which moves under the filter plate (1) to be transported, on its front, Copy - 4 - the filter plate (1) underneath has a bevel (15) and that the driver (11) can be pushed against a spring force in the vertical direction towards the carriage (10). 6) Filter press according to one of claims 1-5, characterized in that the rear driver (12) coming to rest in front of the filter plate (1) to be transported has a bevel (16) on its rear side and that it has an upper, substantially horizontal surface ( 17), which is wider in the transport direction than the distance (a) between the support arms (4) and two adjacent filter plates (D. 7) Filter press according to one of claims 1-6, characterized in that the carriage (10) after all the filter plates (1) have been transported on a second path (30) into its basic position can be moved behind the transported filter plates (1). 8) filter press according to claim 7 characterized in that under the guide track (26) for the carriage (10) to transport the filter plates (1) a second guide track (30) for the return path to the basic position located, each in the area of the front and the rear ends of the guide tracks (26,30) soft-like Facilities are provided. 9) filter press according to claim 8 characterized in that the carriage (10) is provided with rollers (28) which to transport the filter plates (1) on an upper guide track (26) in a chain box (27) are and which are guided to the way back on a lower guide track (30) in the chain case (27), wherein the lower guideway (30) is longer than the upper guideway at the front end and at the rear At the end of a ramp (35) leads from the lower to the upper guideway, which is used for the running of the carriage (10) can be bridged for transporting the filter plates (1). _ 6 - ^c ° py 10) filter press according to claim 9 characterized in that Q is above the opening caused by the ramp (35) a movable flap (36) is arranged which can be raised from below. 11) Filter press according to one of claims 8-10, characterized in that the carriage (10) can be moved by a conveyor chain (31), the conveyor chain (31) having a driver device (32) which engage in a driver guide (33) arranged on the carriage (10) ft. 12) filter press according to claim 11 characterized in that the driver guide (33) has an elongated hole (34) which extends in the vertical direction and which is so long that a driver pin (32) as a driver device into the elongated hole (34) both while the carriage is running in the upper guide track (26) and engages in the lower guide track (30). COPY