EP0712968A2 - Dichtungsmittel - Google Patents

Dichtungsmittel Download PDF

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Publication number
EP0712968A2
EP0712968A2 EP94850171A EP94850171A EP0712968A2 EP 0712968 A2 EP0712968 A2 EP 0712968A2 EP 94850171 A EP94850171 A EP 94850171A EP 94850171 A EP94850171 A EP 94850171A EP 0712968 A2 EP0712968 A2 EP 0712968A2
Authority
EP
European Patent Office
Prior art keywords
bars
screen
movable
fingertip
motion
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Withdrawn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
EP94850171A
Other languages
English (en)
French (fr)
Other versions
EP0712968A3 (de
Inventor
Carl-Otto Wallander
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.)
PICATECH AG
Original Assignee
PICATECH AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20391309&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0712968(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by PICATECH AG filed Critical PICATECH AG
Publication of EP0712968A2 publication Critical patent/EP0712968A2/de
Publication of EP0712968A3 publication Critical patent/EP0712968A3/de
Withdrawn legal-status Critical Current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 present invention deals with a sealing means at the lower end of a mechanical filter for removing particles carried by a stream of water in a channel, said filter comprising a screen consisting of respectively fixed and movable lamellar bars that form an inclined plane down into the water stream, with the edges of the bars facing the water flow direction being stair-shaped, wherein the movable lamellar bars are interconnected in parallel to fore at least one bar screen, which is operated by means of a driving mechanism placed at the upper end of the removing device, to produce a closed circuit motion in the plane of the bars, with a motion component in an upward direction that exceeds the stair height of the bars.
  • Devices for removing screenings according to above are used for example by a water-purifying plants to separate particles from sewage and are known among other through SE 448106.
  • a gap distance is maintained between the fixed and the movable bars, which makes it possible for the water to pass through the filter screen.
  • an opening is normally formed at each movable bar, said opening corresponding to twice the gap distance plus the width of the movable bar.
  • SE 448106 shows in Fig. 4 a solution to the problem, where the fixed bars are made at their lower part with a bigger material thickness, corresponding approximately to the gap width. In this way, the width of the passages is somewhat reduced.
  • a drawback arises however, as the gaps are substantially closed when the movable bars are in their lower position. This implies that the flow through the filter is temporarily reduced, and that the flow becomes pulsating in step with the bar motion.
  • An object of the present invention is to produce a sealing means at the lower part of the screen, which gives a substantially equally great flow over the whole surface of the screen, without a flow limiting threshold at the channel bottom, and without pulsations in the flow.
  • each respective movable bar it at its lower end equipped with a flexibly connected fingertip, which is pivoting in a vertical plane and displaceable, with its outermost end in a sliding bearing, forward and backward along the channel bottom, during the motion of the screen.
  • the device for removing screenings according to the invention is mounted according to the art as an inclined plane in a not shown flume or channel, in such a manner that it reaches down with its lower end in a stream of water that is to be filtered.
  • the lower end of the device rests on the channel bottom 10.
  • the device comprises a screen placed in the space between two side girders 11, which screen in a known manner comprises alternately fixed and movable lamellar bars 12, 13 that form an inclined plane down into the water stream, with the edges of the bars 12, 13 that face the direction of the water stream being stair-shaped.
  • the set of lamellar bars 12, 13 forms a fixed screen part and a movable screen part, the later of which produces a closed circuit motion with a motion component in an upward direction that exceeds the stair height of the bars.
  • the stair ledges are sited substantially horizontally or lean somewhat backwards as seen from the stair front side, when the device is mounted in an operational position in the channel.
  • caught objects and particles are moved up gradually step by step by the screen, until they can pass from the topmost stair over to a following transporter, not shown, for example a band conveyor.
  • Fig. 1 shows a fragment of the lower part of a screen according to the prior art, with the movable bars 13 in their lower position. From Fig. 2 it appears that openings are formed between the fixed bars 12, when the movable ones move upwards. The width of these openings corresponds to twice the gap distance plus the width of the movable bar.
  • Fig. 3-5 shows the lower part of a screen, where the movable bars 13 are in three different positions.
  • Each of the movable bars is at its lower end provided with a flexibly connected fingertip 14, which is pivoting in a plane which is parallel to the longitudinal axis of the bar, i.e. vertical.
  • the end 15 of the lower tip of each fingertip 14 engages with a notch organ 16 in a matching opening 17 in a gliding plate 18.
  • the gliding plate 18 covers an opening 19 in a support plate 20 that rests on the bottom of the channel 10.
  • Fig. 3-5 which illustrate the motion course during the movable bar motion in three stages, the lower ends of the fingertips follow the channel bottom 10 forward and backward, mainly in parallel with said bottom.
  • the fingertips 14 hereby rest via the plate 18 against the upper side of the support plate 20.
  • Fig. 3 shows a position where the movable bars 13 are in a straight line with the fixed ones 12.
  • Fig. 4 shows a position where the movable bars 13 are above the fixed ones 12.
  • Fig. 5 finally, shows a position where the movable bars 13 are below the fixed ones 12.
  • the upstream facing edges of the lower end of the fixed bars and the corresponding edges on the fingertips 14 are provided with sawtooth 21.
  • the upper end of the fingertip is shaped with a segment of a circle 22 that is fitted in a corresponding recess in the lower end of the movable bar 13.
  • This bearing means enables the fingertip to pendulate up and down in an angle sector of approximately 30° in relation to the movable bar 13.
  • the fingertip is mounted by shifting it in from the side, which takes place before the pack with movable bars is put in between the fixed ones. Then, the fingertips can not be removed from their bearing points, due to the fact that they are broader than half the gap width between the fixed bars.
  • Fig. 6 it appears that the fingertips 14 leave remaining gaps between them and the fixed bars 12. Besides, it appears how the notch organ 16 is insertable in an opening 17 in the gliding plate 18.
  • the support plate 20 is designed to give the smallest possible resistance to the water stream on the channel bottom 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Beans For Foods Or Fodder (AREA)
EP94850171A 1993-10-05 1994-10-04 Dichtungsmittel Withdrawn EP0712968A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9303243A SE505169C2 (sv) 1993-10-05 1993-10-05 Tätningsanordning vid den nedre änden av ett mekaniskt filter
SE9303243 1993-10-05

Publications (2)

Publication Number Publication Date
EP0712968A2 true EP0712968A2 (de) 1996-05-22
EP0712968A3 EP0712968A3 (de) 1996-09-18

Family

ID=20391309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94850171A Withdrawn EP0712968A3 (de) 1993-10-05 1994-10-04 Dichtungsmittel

Country Status (2)

Country Link
EP (1) EP0712968A3 (de)
SE (1) SE505169C2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999042668A1 (en) * 1998-02-19 1999-08-26 Mellegard Va-Maskiner Ab Separating grid
DE19919689A1 (de) * 1999-04-30 2000-11-16 Passavant Roediger Umwelttech Filterstufenrechen zum Sammeln und Abgeben von festen Bestandteilen aus strömenden Flüssigkeiten
WO2002046543A1 (de) 2000-12-05 2002-06-13 Hans Huber Ag Maschinen- Und Anlagenbau Vorrichtung zum abscheiden und abtransport von abscheidegut aus einer strömenden flüssigkeit
CN104195986A (zh) * 2014-09-17 2014-12-10 新疆兵团水利水电工程集团有限公司 一种用于隧洞的封堵装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE525381C2 (sv) * 2004-04-26 2005-02-08 Mellegaard & Naij Ab Bottentätning

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE448106B (sv) * 1985-05-24 1987-01-19 Wallander Hydropress Co Ab Anordning for uppsamling och uppfodring av i strommande vatten burna, fasta partiklar
SE461284B (sv) * 1988-06-10 1990-01-29 Wallander Hydropress Co Ab Anordning vid rensgaller

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999042668A1 (en) * 1998-02-19 1999-08-26 Mellegard Va-Maskiner Ab Separating grid
DE19919689A1 (de) * 1999-04-30 2000-11-16 Passavant Roediger Umwelttech Filterstufenrechen zum Sammeln und Abgeben von festen Bestandteilen aus strömenden Flüssigkeiten
DE19919689C2 (de) * 1999-04-30 2003-04-30 Passavant Roediger Umwelttech Filterstufenrechen zum Sammeln und Abgeben von festen Bestandteilen aus strömenden Flüssigkeiten
WO2002046543A1 (de) 2000-12-05 2002-06-13 Hans Huber Ag Maschinen- Und Anlagenbau Vorrichtung zum abscheiden und abtransport von abscheidegut aus einer strömenden flüssigkeit
CN104195986A (zh) * 2014-09-17 2014-12-10 新疆兵团水利水电工程集团有限公司 一种用于隧洞的封堵装置
CN104195986B (zh) * 2014-09-17 2016-01-13 新疆兵团水利水电工程集团有限公司 一种用于隧洞的封堵装置

Also Published As

Publication number Publication date
SE505169C2 (sv) 1997-07-07
SE9303243L (sv) 1995-04-06
SE9303243D0 (sv) 1993-10-05
EP0712968A3 (de) 1996-09-18

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