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EP0765969A1 - Procédé pour le nettoyage sans défauts de grilles à barreaux - Google Patents

Procédé pour le nettoyage sans défauts de grilles à barreaux Download PDF

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Publication number
EP0765969A1
EP0765969A1 EP96114684A EP96114684A EP0765969A1 EP 0765969 A1 EP0765969 A1 EP 0765969A1 EP 96114684 A EP96114684 A EP 96114684A EP 96114684 A EP96114684 A EP 96114684A EP 0765969 A1 EP0765969 A1 EP 0765969A1
Authority
EP
European Patent Office
Prior art keywords
rake
cleaning
drive
foot
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96114684A
Other languages
German (de)
English (en)
Inventor
Helmut Scherer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aqseptence Group GmbH
Original Assignee
Passavant Werke AG and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Passavant Werke AG and Co KG filed Critical Passavant Werke AG and Co KG
Publication of EP0765969A1 publication Critical patent/EP0765969A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
    • E02B8/02—Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material
    • E02B8/023—Arresting devices for waterborne materials
    • E02B8/026—Cleaning devices

Definitions

  • the invention relates to a method for the trouble-free cleaning of so-called bar rakes.
  • bar rakes These are rakes installed in sewage plant inlets or other flow channels that hold back the washed-up material.
  • the floating material retained on the upstream side of the bar rake is cleared with the help of a driven cleaning rake and transported to an overhead discharge point.
  • a known type of cleaning rake contains a pivotably mounted rake arm, on which a pivot lever for attaching a pivot drive is attached. With the help of the swivel drive, the travel drive and a corresponding control, the cleaning rake is moved to the rake foot in the disengaged position for cleaning the bar rake, engaged and moved up to the discharge point. There is a forward swiveling, in which a scraper pulls the screenings from the cleaning rake.
  • the task derives from this description of modifying the screen cleaner in such a way that the accumulations are correctly recognized and then removed in a new cleaning process.
  • This object is achieved according to the invention in that the position of the cleaning rake reached when swiveling is sensed after a certain upward travel distance and if the predetermined engagement position has not been reached the detergent rake is stopped and swung out again, the detergent rake is then moved down again, swiveled in and moved up again, and the detergent rake is then moved using the repetitive control until the intervention control point is confirmed to have been passed in the repetitive circuit and only after confirmed passage through the intervention control point to Discharge point is operated.
  • This new process almost every type of screenings is cleared without lockout. Operation is largely automated.
  • Another advantage of the new cleaning process is that it can be used for both types of rakes, namely both the co-current rake and the counter-current rake.
  • the cleaning process described above primarily detects the accumulations on the rake foot if they are too large for one-time evacuation. If it is determined at the engagement inspection point that the cleaning rake has not been swiveled into the desired position, then this is a sign that the screenings detected cannot be conveyed to the discharge point, because e.g. jammed.
  • the cleaning method according to the invention can also be used for this malfunction in that the sensor for the driving resistance responds in the other direction.
  • the cleaning rake is then stopped according to the invention and opened again, so that the screenings can fall behind. It can regroup. The next attempt to clear may then be successful.
  • the new method also records accidents that are caused by large screenings on the water surface. If the screen cleaner encounters such a non-clearable accumulation during the descent, the sensor speaks for the driving resistance and causes the rake cleaner to stop, swing out and go up again. As a result, the screenings accumulation is loosened up so that they can be passed without problems on the next clearing run by the screen cleaner moving downwards. It is expedient to activate the sensor required to carry out this process design even while the rake cleaner is moving downwards.
  • the control device for the engagement setting detects that the cleaning rake has been swung in sufficiently far, the rake cleaner can pass the place. The stripping and dropping of the screenings take place as usual.
  • the rake shown is a co-current rake in which the rake cleaner 1 works on the upstream side of the bar rake 2.
  • the rod rake 2 set up on the bottom 3 of the channel 4 in a shallow depression 5 is supported with its upper rod ends on a cross member 6 crossing the channel.
  • the extension of the bar rake upwards is a chute 7 which merges into the collecting slide 9 via a corridor 8.
  • the rack 10 is set up in a recess 11 of the hall cover.
  • the side facing the chute is designed as a rail 12 for the chassis 13 of the pivotably articulated cleaning rake 1.
  • the rail contains a rack gear (not shown), in which the driven pulley wheel 14 engages for upward and downward travel.
  • the cleaning rake 1 contains a lever arm 15 which projects backwards and on which the swivel drive 16 designed as an electric spindle drive acts.
  • the other articulation end lies on a cantilever arm 17 belonging to the undercarriage.
  • the spindle drive according to FIG. 2 is designed as a stepping drive with four defined positions of the lifting spindle 18. The positions are marked with degrees: 0 GR for clearing, 5 GR for partially indented position, 15 GR for the fully pivoted position, and - 15 GR for release position.
  • the level meter (not shown) provided on the upstream side of the rake gives the impulse 30 for the next clearing run.
  • the rake cleaner resting in position F with an angular position of 5 GR receives command 31 to swing out into the 15 GR position. As soon as this is reached, the downward movement 32 begins. If the sensor for the driving resistance does not respond (path 33), the travel drive is stopped when the switching point S is reached (pulse 34) and the command 35 is given to swivel the cleaning rake in. The travel drive is then switched on for upward travel 36.
  • the angular position of the cleaning rake is checked using the swivel drive. If the 0-GR or 5-GR position 37 is reached, the cleaning rake continues to switch position A and is there stopped (command 38). Now the cleaning rake is swung forward into the -15-GR position 39 by switching on the swivel drive and switched on again when this position 40 is reached.
  • the scraper 22 which is pivotably articulated on the rake part, becomes effective by sliding over the cleaning scoop and scraping the screenings over the front edge thereof. This process ends when the highest switching point 0 is reached.
  • the travel drive is stopped (impulse 42) and the cleaner rake is swung out into the 5-GR position by actuating 43 the swivel drive.
  • the rake cleaner returns to the rest position F in the subsequent downward travel 45 and is stopped there (pulse 46).
  • the screen cleaner is activated for the next clearing process.
  • the sensor 20 responds to the driving resistance (impulse 47) when driving down to the rake foot, then the undercarriage is stopped here (impulse 34) and the above-mentioned clearing process is triggered.
  • the early return and clearing is repeated as often as the set counter connected to the sensor allows. Only when the set number has been reached does the chassis finally switch off and trigger a fault message.
  • the sensor for the driving resistance can also respond when driving upwards. This case is not shown in the function diagram. In this case, the drive is stopped, the cleaner rake swung out to the 15-GR position and moved back to the rake foot. If the further clearing attempts set on the counter do not work, then the control is set up so that the cleaning rake bypasses the screenings accumulation accumulated on the water surface in the fully swiveled-out position and tries to clear from above.
  • the travel drive receives the impulse to stop and the rotary drive receives the impulse 49 to swing out into the 15-GR position.
  • the downward movement 32 begins again to the rake foot.
  • a counter is started which, when the set number of unsuccessful clearing attempts is reached, stops the travel drive and triggers a fault alarm.
  • This control of the screen cleaner detects all occurring malfunctions and controls the screen cleaner so that only malfunctions that cannot be eliminated by the repeated runs of the screen cleaner lead to shutdown.
  • the operation of the rake is therefore much more automated and relieves the clarifier of manual work and manual operation.
  • the rake is out of service less often.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning In General (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
EP96114684A 1995-09-27 1996-09-13 Procédé pour le nettoyage sans défauts de grilles à barreaux Withdrawn EP0765969A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19535901 1995-09-27
DE1995135901 DE19535901C1 (de) 1995-09-27 1995-09-27 Verfahren zum störungsfreien Reinigen von Stabrechen

Publications (1)

Publication Number Publication Date
EP0765969A1 true EP0765969A1 (fr) 1997-04-02

Family

ID=7773300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96114684A Withdrawn EP0765969A1 (fr) 1995-09-27 1996-09-13 Procédé pour le nettoyage sans défauts de grilles à barreaux

Country Status (3)

Country Link
EP (1) EP0765969A1 (fr)
DE (1) DE19535901C1 (fr)
PL (1) PL181548B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU742248B2 (en) * 1997-05-02 2001-12-20 Cargill Incorporated Degradable polymer fibers; preperation; product; and methods of use

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SK283778B6 (sk) * 1997-05-06 2004-01-08 Headworks Inc. Mechanicky čistený filtrovací systém
DE102005010576A1 (de) * 2005-03-04 2006-09-14 Gesellschaft für Planung, Maschinen- und Mühlenbau Erhard Muhr mbH Rechenanlage mit anpreßbarer Reinigungsharke

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2103739A1 (de) * 1971-01-27 1972-08-10 Geiger Maschf Helmut Rechenreiniger mit elektromotorischem Antrieb einer parallel zum Rechen verfahrbaren und diesem gegenüber schwenkbaren Harke
DE2500067A1 (de) * 1974-01-11 1975-07-17 Ingbuero Roshard Ag Rechenreinigungsanlage fuer stroemende gewaesser, insbesondere fuer zulaeufe von klaeranlagen
US5167803A (en) * 1990-10-10 1992-12-01 Envirofab, Incorporated Mechanically cleaned bar screen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4646067A (en) * 1983-07-11 1987-02-24 Maschinenfabrik Hellmut Geiger Gmbh & Co. Kg. Security bar rack
DE3546038A1 (de) * 1985-12-24 1987-07-02 Hans Schick Verfahren und einrichtung zur steuerung des bewegungsablaufes der rechenharke eines rechenreinigungsgeraetes in wasserbaulichen anlagen
DE3933462A1 (de) * 1988-10-31 1990-05-03 Geiger Maschf Helmut Verfahren und vorrichtung zum foerdern von rechengut
DE4201116A1 (de) * 1992-01-17 1993-07-22 Dieter W Dr Ing Vetterkind Aufstiegsueberwachung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2103739A1 (de) * 1971-01-27 1972-08-10 Geiger Maschf Helmut Rechenreiniger mit elektromotorischem Antrieb einer parallel zum Rechen verfahrbaren und diesem gegenüber schwenkbaren Harke
DE2500067A1 (de) * 1974-01-11 1975-07-17 Ingbuero Roshard Ag Rechenreinigungsanlage fuer stroemende gewaesser, insbesondere fuer zulaeufe von klaeranlagen
US5167803A (en) * 1990-10-10 1992-12-01 Envirofab, Incorporated Mechanically cleaned bar screen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU742248B2 (en) * 1997-05-02 2001-12-20 Cargill Incorporated Degradable polymer fibers; preperation; product; and methods of use

Also Published As

Publication number Publication date
PL181548B1 (pl) 2001-08-31
DE19535901C1 (de) 1997-01-23
PL316333A1 (en) 1997-04-01

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