DE19925934A1 - Effluent channel trash rack as power-rotated disk dipping in against flow and entered in free center space by screen-walled collecting container on hoist. - Google Patents

Abstract

The rack body (4) consists of a circular disk (8) equipped with rack bars or screens (2) and rotated by a drive. The disk stands at right angles to flow in channel (6) so as to partly dip into the effluent. The disk center area (12) presents a free space (14) for the trash collector container (16). One or more drivers (22) are fitted to the disk side against flow and the disk is doubly sealed relative the channel (6). The free space (14) extends beyond the disk screen level in the flow direction and the container (16) swings into and out of the space (14) and is hung on parallel rods (24) so the container maintains its position relative the horizontal throughout the container swivel movements. The container (16) has perforated sidewalls (28) and/or base (32) and once swung out can move up and down as required, using the hoist (34). The disk has its own subtended cleaning device comprising a set of nozzles facing against the flow on the obverse of the disk.

Description

The invention relates to a rake for sewage plants or the like.  with a rake or sieve with rake per, which can be moved out of the channel with the screenings is and in which the screenings outside the channel from the Rakes or sieves is removed.

A rake with these features is according to an earlier example applicant's stroke from the Swiss patent. 505 761 be knows. In this known rake, the entire rake with the screenings dug out of the channel, the level if provided cleaning device arranged and is formed that the screenings outside the channel of the slide bars is stripped. For this, the rake is included the cleaning device, which consists of a curved track controlled wipers exists, inevitably kup pelt that the cleaning device only then the rake bars cleans when the rake with the screenings from the flume was moved out. After moving the rake out the flow of waste water from the channel is not interrupted this known rake additionally has a fixed in the channel built-in auxiliary rake on which whenever the real labor rake outside the flume is that Catches screenings. This auxiliary rake becomes automatic in it  and inevitably cleaned by the main rake when the Main rake performs its next stroke. Overall is the Re known after this earlier proposal by the applicant comparatively complex.

Most of the Re used previously for sewage systems chen has a rod grate built into the sewage channel on which of a mechanically moving cleaning device processing in the form of a rake continuously or periodically from the screenings deposited on the bars of the grate becomes. These rakes work in a way that Screenings by the scraper or rake from the screen ben stripped, excavated and by another scraper from the scraper is stripped. The rake forms here at a right angle to the rake bars and where the To stop the rakes, a container must be provided so that the screenings can be raised further until it reaches the area of the second wiper. After this The so-called Klet work on the same principle calculate the rake using a drive stick is movable up and down on a guideway where with additionally relatively complicated guides for the movement of the rake in the various working positions lungs are required.

Also known are sheet rakes with machine cleaning, the bars of the rake in the form of a quarter circle are installed in the flume, so that the lower end of the Shooting tangentially to the bottom of the channel. The Screenings along the bars become the upper end of the arch stripped by the rake and there by movable  Bars thrown off, which by means of crankshafts and weights can be operated via push rods.

The basic type of rake where rakes or Similar wipers are used, have the common Characteristic on that the screenings in the flow direction of the waste water when cleaning the rake, lift up vertically on the grate bars is moved, so that inevitably a large part of the arithmetic tes due to the rake pressure against the rake bars is pushed through the rake bars so that a large A large part of the benefit of arithmetic, namely bulky goods hold back, is inevitably lost again.

To avoid this disadvantage, so-called "step screen "- fine rake known, which consists of two with a large Number of steps provided and made up of slats built rakes exist, of which one rake firmly in the Channel is installed and the other through the first rake rake of the same shape through a crank drive is movable. This will with every circular movement the moving screen slats the screenings automa table up the stairs step by step and can be dropped at the top. The construction is this calculation method is extremely complex.

So-called paternoster screens are also known, where the basic structure is similar to that of an escalator Sieve elements are provided. Here too is the construction quite complex.  

In addition, spiral sieve rakes are known, which are designed in the manner of a screw conveyor. Here too the construction is extremely complex.

In general, apart from the operational disadvantages len, in addition from all known computer construction Types can be said that the design effort again increases significantly when such rakes enter deep channels should be set, since here the total height of the drop or collecting container up to the bottom of the channel niche can only be overcome with considerable effort.

The invention is based on this prior art based on the task of a universally applicable rake of the type mentioned at the outset, which is characterized by an extremely effective mode of operation and an out spoke low design effort.

In the case of a rake of the type defined at the beginning, this becomes open s essentially solved in that the computing body with the rakes or sieves as rotatable by a drive Circular disc is formed, which is at right angles to Flow direction of the waste water is arranged in the channel and is partially immersed in the wastewater, and that in the zentra len area of the circular disc a space for a catch container is provided.

By the invention, the object defined above in vol len scope solved, because a very simple construction one is created in which neither the entire rake nor the cleaning device is raised in relation to the channel, let alone be completely moved out, but ge  all you need to do is turn the circular disc around the the screenings catching part of the circular disc with the Re to move the good out of the channel, after which this under the effect of gravity in those located in the free space Is collected. Inside the channel there are no mechanical parts that ver are subject to wear or stress.

In an advantageous development according to the invention provided that opposite to the direction of flow th side of the circular disk one or more, preferably four drivers are provided. This will secure represents that even larger screenings when rotating the Circular disk first up to over the collecting container in which freedom is promoted.

This ensures that the entire screenings are opened will catch, it is also preferred that the circular disk ge is sealed off from the channel by two seals.

In an advantageous feature according to the invention is provided see that the space above the level of the sieves in Strö direction extends so that the collecting container in a Position can be in which he does the entire rake can catch well.

It is also preferred that the collecting container in the free space can be swung in and out of it to create a To facilitate removal of the collected screenings.

For this purpose, there is an advantageous development of Invention in that the collecting container on parallel core  is suspended, which are motor-driven, such that when swiveling in and out, the position of the collecting container ters remains unchanged from the horizontal.

In particular, it is advantageous that the collecting container ge perforated side walls and / or bottom, which the Vor part offers that possibly transported wastewater can drip and is not removed.

In particular, it is preferred that the collecting container in the swiveled out position can be moved up and down is formed, according to a preferred feature the invention of the collecting container suspended in a hoist is. This allows the rake according to the invention at ge low manufacturing effort and design effort in close insert to any depth, since only the pronounced one fold-up hoist or its guide accordingly ver must be extended.

In order to facilitate the removal, the collecting container is be preferably motorized tiltable, so that after reaching the corresponding altitude in the hoist a slight Removal of the screenings is possible.

It is also preferred that the circle in the upper region disk is provided a cleaning device, which si creates the screenings if it is not covered by itself Gravity drops into the container from which Seven is separated. This cleaning device can it is preferably a simple nozzle assembly, wel cher opposite to the flow direction of the waste water the back of the sieves is directed.  

The rake bars or screens are preferably in the rake body arranged interchangeably, so that the rake according to the invention easily used as a coarse screen or as a fine screen can be.

In particular, the invention can be further developed by this that the free space through a cylindrical housing with egg ner rear wall is formed. The rear wall is preferred with the Drive shaft of the drive of the circular disc connected so that through the combination of these characteristics, a very pronounced one fold storage of the entire rake is possible.

The housing is over to simplify the overall construction the drivers connected to an outer ring of the circular disc and the rakes or sieves extend between the Housing and the outer ring, so that this on the one hand easy interchangeability of the slide bars or sieves underneath is supported and on the other hand a very simple con structure is created.

The invention will now be described with reference to two Exemplary embodiments explained in more detail. In the drawings shows

Figure 1 is a schematic side sectional view of a he most embodiment of the rake according to the invention.

Fig. 2 is a sectional view taken along the line II-II of Fig. 1;

Fig. 3 is a sectional view taken along the line III-III of Fig. 1;

Fig. 4 is a sectional view taken along the line IV-IV of Fig. 1;

FIG. 5 is a view in the direction of arrow V of FIG. 1, the lifting cable lying behind the circular disk not being shown here;

Fig. 6 is a schematic sectional view taken along the line VI-VI of Fig. 1;

Fig. 7 shows a detail of the sealing of the circular disk compared to the channel and

Fig. 8 is a highly schematic, Fig. 1 corresponding view of an embodiment of the rake according to the invention, as it can be used in deep channels.

In Figs. 1 to 7 in the various views and details of a first embodiment of the rack generally designated 1 for sewage systems is od. Like. Shown.

The rake 1 has a rake body 4 carrying rake bars or sieves 2 , which is built into a channel 6 and collects the screenings from the waste water stream 7 there . The rake body 4 with the sieves 3 is, as shown, formed as a circular disc 4 , which is at right angles to the direction of flow of the wastewater stream 7 and is immersed in the wastewater to about a quarter.

The rake body 4 formed by the circular disk 8 is rotatably driven by a drive 10 , which is formed in the exemplary embodiment from an electric motor 11 .

In a central area 12 of the circular disk 8 , a free space 14 is provided which can accommodate a collecting container 16 for the screenings.

On the side of the circular disk 8 pointing to the flow direction of the waste water stream 7, extending drivers 22 are provided between the outer edge of the free space 14 and the outer circumference of the circular disk 8 , four examples of such drivers 22 being provided in the embodiment. Compared to the channel 6 , the rotary disk 8 rotated by the drive 10 is sealed by two seals 19 and 23 attached to the circular disk, which, as can be seen from the detailed view according to FIG. 7, are preferably adjustable. The step 5 shown in FIG. 7 in the bottom 9 of the channel 6 is formed by a number of wedge-shaped lifts 3 , as can be seen in particular in FIG. 4, and which shows a transition from the square or rectangular cross section of the channel 6 to the circular shape form the part of the circular disk 8 immersed in the waste water.

As shown in FIGS. 1, 3 and 4, the free of the wires 2 reaches space 14 in the disc 8 in the direction of flow beyond the plane, so that the containment vessel 16 may extend from reaching far into the disc 8, to safely collect the screenings .

As can be seen in particular from Fig. 1, in which three different positions of the receptacle are illustrated during the operation of the rake according to the invention, the receptacle 16 is in the free space 14 by a drive to 16 in and out by the Auffangbe container 16 on parallel bars 24 , 26 is suspended, which are driven by the drive 16 .

The drive 15 , like the drive 10 , is also preferably an electric motor 17 , which is connected via a corresponding transmission to at least one of the parallel control arms 24 or 26 on both sides of the collecting container 16 .

As also shown in FIGS. 1 and 2 can best be seen, the collecting container is formed upward 16 in the pivoted-out position, and moved downward by collection container is suspended in a hoist 16 on the.

From the comparison of the two different positions of the collecting container 16 with respect to the lifting train 34 , as illustrated in FIG. 1, it can be seen that the suspension of the collecting container 16 by means of the parallel links 24 , 26 is such that the collecting container 16 when entering and leaving Swing out from the free space 14 retains its position relative to the ho rizontalen, so that the collected screenings are taken safely. Preferably, the collecting container 16 is also provided with perforated side walls 28 and 30 and perforated bottom 32 , so that possibly entrained water can run off with the screenings and is not removed.

As further shown in Fig. 1 in the uppermost position of the Auffangbe container 16 , this is motor-tiltable by the collecting container 16 itself is taken up in a holder 27 to which the parallel links 24 , 26 are articulated and the collecting container 16 in the Holder 27 is pivotally mounted about an axis 29 . For the pivoting movement of the collecting container 16 relative to the holder 27 , a motor 31 is again provided, by means of which the axis 29 is pivoted via a suitable gear. With this arrangement, the collecting container 16 can be tilted in order to drop the rake well into a collecting container 35 .

To clean the sieves 2 is in the upper part of the circular disc 8 a generally designated 36 Reitigungsvor direction is provided, which is formed in the embodiment as Dü senstock 38 , whose nozzles are directed opposite to the flow direction of the waste water on the back of the sieves 2 . This ensures that, when the cleaning device 36 is actuated, any screenings still adhering to it are also thrown into the collecting container 16 , the water used for cleaning being able to run off through the perforated side walls 28 , 30 or the perforated bottom 32 of the collecting container 16 .

As already mentioned above, the rake bars or sieves 2 are interchangeably arranged in the rake body 4 . For this purpose and for the simplest possible mounting of the circular disk 8 , the free space 14 is formed by a cylindrical housing 40 which has a rear wall 42 . The rear wall 42 is connected to the drive shaft 44 of the drive 10 , the drive shaft simultaneously taking over the bearing of the entire circular disk 8 by the drive shaft 44 being guided in a bearing 45 .

The housing 40 of the free space 14 is connected to the disk 8 in the embodiment, for example four drivers 22 with an outer ring 46 , the rake bars or screens 2 extending between the housing 40 and the outer ring 46 and thus by appropriate choice of fasteners to the Both parts can be easily replaced.

For completeness' sake it is mentioned that the circular disk 8 is enclosed with its drive 10 by an outer housing 48 that the path swept out by the cleaning means 48 of the disc 8 also covers on the front.

With reference to FIG. 2, some details of the hoist 34 will be explained in more detail.

As shown, the hoist 34 consists essentially of a simple frame 37 , which is formed by two vertical supports 50 , 52 and a cross member 54 . On the supports 50 , 52 two carriages are movable up and down ge leads, which are connected by a cross member 60 . The cross member 60 carries the suspension of the collecting container 16 including the drive 15 formed by the electric motor 17 for the parallel link 24 , 26th The cross member 60 itself is connected to a hoist 62 , which is guided via appropriate pulleys 64 and 66 to an electromotive driven winding drive 68 . By corre sponding actuation of the winding drive 68 , the travers 60 and thus the collecting container 16 can be moved up and down relative to the supports 50 , 52 .

The principle of operation of the computing according to the invention is shown in three different phases, as in FIG . From the starting point is the lower position of the collecting container 16 , whereby this is pivoted as far as possible into the free space 14 of the circular disc 8 . The raking in the water immersed in the Abwasser serstrom 7 parts of the sieves 2 is good after a certain amount of accumulation, as can be detected automatically for example by the level difference of the water level in front of and behind the circular disc, by rotating the circular disc over the Drive 10 is conveyed upwards and then falls into the collecting container 16 under the action of gravity. Screenings which may still be adhering are flushed down by actuating the cleaning device 36 and likewise falls into the collecting container 16 .

When the collecting container 16 is filled to the desired extent, this is pivoted out of the free space 14 by actuating the drive 15 via the parallel linkage 24 , 26 , and then moved upward by actuating the winding drive 68 in the frame 37 forming the lifting train 34 . After he reach the required height, in turn, the parallel linkage 24 , 26 are completely pivoted from the drive 15 and then pivoted by actuating the motor 31 of the collecting container 16 about the axis 29 relative to the holder 27 , so that the collected screenings in the Sam mel container 35 is dropped. Thereafter, the Auffangbe container 16 in corresponding reverse order of Ar beits steps again in the free space 14 of the circular disc 8 is spent to take up the accumulated screenings with further rotary movements of the circular disc 8 .

In Fig. 8 is still schematically shown in Fig. 1 correspond to the view of a modified embodiment of the rake according to the invention, which explains how easy the invention can also be used in deep channels with the least design effort. In this case, the rake 1 is identical to the embodiment according to FIGS. 1 to 7 and only the frame 37 is extended downwards in order to move the collecting container 16 between the layers caused by the arrangement of the channel 6 .

With regard to further details, therefore, the above refer to the description above.

All from the description, the claims and drawings gene emerging features and advantages of the invention finally, constructive details and spatial arrangement can be used both individually and in any combination nation essential to the invention.  

Reference list

1

rake

2nd

Sieves

3rd

Increases

4th

Rake body

5

support

6

Flumes

7

Sewage flow

8th

Circular disc

9

Bottom of

6

10th

drive

11

Electric motor

12th

central area

14

free space

15

Drive from

16

16

Collecting container

17th

Electric motor

18th

side of

8th

19th

poetry

20th

side of

8th

22

Carrier

23

poetry

24th

Parallel link

26

Parallel link

27

Holder of

16

28

Sidewall of

16

29

axis

30th

Sidewall of

16

31

engine

32

Bottom of

16

34

Hoist

35

Collection container

36

Cleaning device

37

frame

38

Nozzle assembly

40

casing

42

Back wall

44

drive shaft

45

camp

46

Outer ring

48

casing

50

support

52

support

54

Cross member

56

carriage

58

carriage

60

traverse

62

Hoist

64

Pulley

66

Pulley

68

Winding drive

Claims (17)

1. rake for sewage systems or the like. With a rake or sieve having rake body, which can be moved out of the channel with the rake and in which the compute outside the channel is removed from the rake bars or ben, characterized in that the Rechenkör by ( 4 ) with the rake bars or screens ( 2 ) as a drive ( 10 ) rotatable circular disc ( 8 ) is formed, which is arranged at right angles to the direction of flow of the waste water in the channel ( 6 ) and partially immersed in the waste water and that in a central area ( 12 ) of the circular disc ( 8 ) there is a free space ( 14 ) for a collecting container ( 16 ). 2. Rake according to claim 1, characterized in that on the opposite direction of flow ( 18 ) of the circular disc ( 8 ) one or more, preferably four entrainers ( 22 ) are provided. 3. Rake according to claim 1 or 2, characterized in that the circular disc ( 8 ) against the channel ( 6 ) is sealed by two seals ( 19 , 23 ). 4. Rake according to one of the preceding claims, characterized in that the free space ( 14 ) in the flow direction of the waste water extends beyond the plane of the sieves ( 6 ) of the circular disc ( 8 ). 5. Rake according to one of the preceding claims, characterized in that the collecting container ( 16 ) in the free space ( 14 ) in and out of this can be pivoted. 6. Rake according to claim 5, characterized in that the collecting container ( 16 ) is suspended from parallel bars ( 24 , 26 ), such that the position of the collecting container ( 16 ) remains unchanged with respect to the horizontal when pivoting in and out. 7. Rake according to one of the preceding claims, characterized in that the collecting container ( 16 ) has perforated side walls ( 28 , 30 ) and / or bottom ( 32 ). 8. Rake according to one of claims 4 to 7, characterized in that the collecting container ( 16 ) is designed to be movable up and down in the pivoted-out position. 9. Rake according to claim 8, characterized in that the collecting container ( 16 ) is suspended in a hoist ( 34 ). 10. Rake according to one of the preceding claims, characterized in that the collecting container ( 16 ) can be tilted by a motor. 11. Rake according to one of the preceding claims, characterized in that a cleaning device ( 38 ) is provided in the upper region of the circular disc ( 8 ). 12. The apparatus according to claim 11, characterized in that the cleaning device ( 38 ) as opposite to the flow direction of the waste water on the back of the sieves ( 2 ) directed nozzle assembly ( 38 ) is formed. 13. Rake according to one of the preceding claims, characterized in that the rake bars or sieves ( 2 ) in the re computing body ( 4 ) are arranged interchangeably. 14. Rake according to one of the preceding claims, characterized in that the free space ( 14 ) is formed by a cylindrical housing ( 40 ) with a rear wall ( 42 ). 15. Rake according to claim 14, characterized in that the rear wall ( 42 ) with the drive shaft ( 44 ) of the drive ( 10 ) is connected. 16. Rake according to claim 14 or 15, characterized in that the housing ( 40 ) via the driver ( 22 ) with an outer ring ( 46 ) of the circular disc ( 8 ) is connected. 17. Rake according to claim 16, characterized in that the rake bars or screens ( 2 ) extend between the housing ( 40 ) and the outer ring ( 46 ).