EP1381477A1 - Scraper rake for a disc-screen and shaft cleaning device - Google Patents
Scraper rake for a disc-screen and shaft cleaning deviceInfo
- Publication number
- EP1381477A1 EP1381477A1 EP02710044A EP02710044A EP1381477A1 EP 1381477 A1 EP1381477 A1 EP 1381477A1 EP 02710044 A EP02710044 A EP 02710044A EP 02710044 A EP02710044 A EP 02710044A EP 1381477 A1 EP1381477 A1 EP 1381477A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tines
- rake
- scraper
- rake according
- scraper rake
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
- B07B1/52—Cleaning with brushes or scrapers
- B07B1/526—Cleaning with brushes or scrapers with scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/12—Apparatus having only parallel elements
- B07B1/14—Roller screens
- B07B1/15—Roller screens using corrugated, grooved or ribbed rollers
Definitions
- the invention relates to a scraper rake for a sieve disk and shaft cleaning device, comprising a rake bar as a carrier for a plurality of knife-like tines, the tines projecting into the interstices between the sieve disks and being oriented towards the sieve disk shaft and the tines having at least two oppositely directed, finger-shaped cutting edges have an intermediate recess, according to the preamble of claim 1.
- the cleaning unit has a cleaning comb which holds a comb knife in a cleaning comb web.
- the cleaning comb web is made up of a comb knife holder with an adjusting screw and a clamping plate fastened with clamping screws.
- the known device is used to clean a disc screen during operation, so that the expenditure for maintaining the entire disc screen arrangement is reduced.
- the basic idea of the invention consists in the design of a movable rake tine, which is partly located in a tube and is guided there. An existing cutout or slot is covered by a cap-like dirt deflector, so that the entry of foreign bodies into the pipe interior is effectively prevented.
- the rake tines move.
- the cutting angles of the cutting edges provided on the tines correspond to those of a turning tool, so that it is similar to that of the cutting tool
- the rake bar is tubular to accommodate tines pivotable and / or radially displaceable about the longitudinal axis of the bar. In order to be able to fasten the tines on the bar, you have to use the upper one
- a mounting flange is attached to the face of the rake bar, preferably by welding.
- the tines which are made of flat steel, for example, have a tine foot with a recess and a threaded section.
- the threaded section can be cut or turned, but can also be realized by welding a threaded bolt.
- the above-mentioned recess forms a stop for a cylinder spring which, in the assembled state, is supported against the lower tube area.
- the circular, cap-like dirt deflector is provided, which preferably consists of a tube segment and is welded or pressed or shrunk onto the prongs.
- the tines with the tine base and threaded section are exchangeably and adjustably fastened via the cylinder segment cutouts and holes on the right beam.
- the cylindrical segment cutouts have stop edges on the inside for the tine base, the cutouts running parallel to the longitudinal axis of the rake bar and the radial edges parallel to one another and to adjacent milling areas.
- the stop edge can have a chamfer which essentially corresponds to the pivoting angle of the tines.
- the bores in the lower tube area are recessed on the outside in order to form a journal bearing for the pivoting of the tines in connection with a spherical collar nut.
- the tine base preferably has a rectangular cross section, which in the area of the recess changes into a square shape which is adapted to the inside diameter of the cylinder spring.
- the free length of the cylinder spring is less than or equal to the inner diameter of the bar bar.
- the pipe segment-like dirt deflector is designed on the dimension side in such a way that there is minimal play between the deflectors of adjacent tines in order to prevent the penetration of dirt particles.
- the cutting edges of the tines have bevels which converge towards one another, the metallic material being hardened at least in the region of the cutting edges or a hard metal insert being introduced here.
- the complete tines can also be made of hard metal.
- the radial position of the respective tine can be varied by adjusting the spherical collar nut on the threaded section, the respective position being used to fix the end position Ball nuts are countered.
- the adjustment also changes the preload of the respective internal spring, which means that the retention or cutting force can be adjusted.
- the chamfer angle of the cutting edges is matched to the conicity of correspondingly shaped sections of the screen disk shafts that are located between the screen disks, or corresponds to this angle.
- a permanent lubricant in particular grease, is located in the area between the spherical collar nut and the bore.
- the computing bar itself is designed to be displaceable parallel to the screen disk shaft in a manner known per se, so that the desired cleaning effects, also in relation to the screen disks themselves, are ensured.
- the pivoting angle of the tines is preferably in the range between ⁇ 3 ° and ⁇ 5 °.
- the springs used are preferably cylindrical compression coil springs.
- Figure 1 shows the basic arrangement of a scraper rake in the screen deck.
- FIG. 2 shows a representation of a tine with a tine foot and threaded section
- Figure 4 is a sectional view through the rake bar with tines and recognizable sieve disks.
- Fig. 5 shows a partial longitudinal section with rake bars, tines and screen disc shaft with conical areas.
- a wiping rake 1 is arranged below the screen disk shafts 2 and screen screens 3 located there.
- the scraper rake 1 is used to remove materials that get into the spaces between the sieve disks and settle there on the shafts. When the scraper rake can be moved into or out of the image plane, the rake tines move past the panes and clean them.
- a special tine 4 for use within the scraper rake 1 is shown in FIG. 2.
- the tine 4 has a tine foot 5 with a recess 6.
- the recess 6 merges into a threaded section 7 which receives a spherical collar nut 8 and a lock nut 9.
- the tine is designed, for example, with a square cross section and above the recess 6 with a rectangular cross section.
- the threaded section 7 can be longitudinal, as can be seen from the sectional illustration shown the axis AA, introduced into a corresponding recess in the lower foot area and welded.
- the cutting edges 10 are directed in opposite directions and are finger-shaped with a recess in between.
- the cutting edges 10 of the tines 4 have bevels 11 which run towards one another.
- the cutting angles of the cutting edges or the bevels are designed in such a way that effects result analogously to a turning tool, so that there is a machining process and thus incisions in plastics, textiles and the like comes further, which unwoundly wrap the screen disk shafts and adhere there.
- FIG. 3 shows the possibility of the individual tines pivoting sideways, for example by an angle, starting from a central axis of e.g. 4 ° shown.
- the assembled tine 4 is guided with a cylinder spring 12 within the tubular rake bar 13.
- the cylinder spring 12 is supported on the one hand against the recess 6 and on the other hand against the inner wall of the rake bar 13.
- a depression 14 in a corresponding bore in the lower region of the rake bar forms a type of journal bearing in connection with the spherical collar nut 8.
- a cylindrical segment cutout 15 is introduced, which includes stop edges 16 for the tines 4.
- an arc-shaped, cap-like dirt deflector 17 is fastened, preferably by welding or pressing.
- the upper tube area of the computing bar 13 there are a plurality of adjacent cylinder segment cutouts 15 and corresponding bores with countersink 14 in the lower area.
- An end-side fastening flange 18 serves to fix the rake bar to a carrier known per se.
- the stop edges 16 for the pivoting movement of the respective tine 4 can be provided with a chamfer.
- the millings 15 run perpendicular to the longitudinal axis of the rake bar and the radial edges of the individual millings are parallel to one another and to adjacent milling areas.
- the design of the dirt deflectors 17 and the spacing of the individual tines 4 is chosen according to FIG. 5 so that a minimal play results between the dirt deflectors 17 and the cutting edges 10 of the tines 4 are spaced apart by a predetermined amount from a conical section 19 of the screen disk shafts 2 run.
- the cap-like dirt deflectors 17 preferably have a tubular segment or cylindrical segment shape and are connected to the prongs 4 by welding.
- the tines 4 are hardened at least in the area of the cutting edges 10, consist overall of a hard metal or have a hard metal attachment.
- the bevel angle of the cutting bevels 11 is matched to the conicity of the shaft sections 19 or corresponds to this angle.
- the swivel angle of the tines is in the range between ⁇ 3 ° and ⁇ 5 °.
- the springs 12 used are cylindrical compression coil springs.
- the plurality of cylinder segment cutouts 15 provided in the tubular rake bar 13 in conjunction with the journal mounting of the tines 4 allows the tines 4 to pivot about the longitudinal axis of the rake bar 13.
- the resilient radial mounting of the tines 4 in connection with the provided cylinder springs 12 has a blocking effect and ensures that a once set radial position of the tines 4 is retained.
- the cap-like dirt deflector connected to the tines in turn prevent foreign bodies from entering the interior of the tubular rake bar, so that sufficient long-term stability and low maintenance requirements for the overall device are also given in this aspect.
Landscapes
- Combined Means For Separation Of Solids (AREA)
- Cleaning In General (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10114957 | 2001-03-27 | ||
DE10114957A DE10114957C1 (en) | 2001-03-27 | 2001-03-27 | Scraper rake, for screen disc cleaning device, has several adjustable tines fitting in tubular rake bar and swiveling about longitudinal axis |
PCT/EP2002/000861 WO2002076636A1 (en) | 2001-03-27 | 2002-01-28 | Scraper rake for a disc-screen and shaft cleaning device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1381477A1 true EP1381477A1 (en) | 2004-01-21 |
EP1381477B1 EP1381477B1 (en) | 2005-04-27 |
Family
ID=7679181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02710044A Expired - Lifetime EP1381477B1 (en) | 2001-03-27 | 2002-01-28 | Scraper rake for a disc-screen and shaft cleaning device |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1381477B1 (en) |
AT (1) | ATE294029T1 (en) |
DE (2) | DE10114957C1 (en) |
ES (1) | ES2240709T3 (en) |
WO (1) | WO2002076636A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005044552B4 (en) * | 2005-09-17 | 2013-06-06 | Backers Maschinenbau Gmbh | Star screen with cleaning device |
FI120820B (en) * | 2008-10-13 | 2010-03-31 | Remu Oy | Apparatus for screening material |
CN104492683A (en) * | 2014-12-25 | 2015-04-08 | 四川皇龙智能破碎技术股份有限公司 | Novel pectinate cleaning device for roller screen |
US10137573B2 (en) * | 2016-08-10 | 2018-11-27 | Cp Manufacturing, Inc. | Cleaning robot for recycling equipment |
CN107999390B (en) * | 2017-12-15 | 2024-04-26 | 华能国际电力股份有限公司上海石洞口第一电厂 | Roller screen cleaning device |
CN109046912A (en) * | 2018-08-07 | 2018-12-21 | 太仓金马智能装备有限公司 | A kind of dish sieve |
CN114030102A (en) * | 2021-11-22 | 2022-02-11 | 梁美兰 | Filter screen maintenance cleaning equipment for drying and filtering color master batches |
CN115056024A (en) * | 2022-05-30 | 2022-09-16 | 刘浩武 | Chip removal device for machine tool |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE603341C (en) * | 1934-09-27 | Buckau R Wolf Akt Ges Maschf | Scraper for disc roller grates for sieving off bulk material | |
DE474491C (en) * | 1927-05-31 | 1929-04-04 | Messner Franz | Cleaning device for classifying grates |
DE625491C (en) * | 1933-01-21 | 1936-02-10 | Buckau R Wolf Akt Ges Maschf | Roller scraper |
DE19825340C2 (en) * | 1997-06-07 | 2002-07-25 | Eurec Technology Gmbh Entsorgu | Arrangement of a sieve and cleaning unit, the cleaning unit being located below the disc unit |
-
2001
- 2001-03-27 DE DE10114957A patent/DE10114957C1/en not_active Expired - Fee Related
-
2002
- 2002-01-28 WO PCT/EP2002/000861 patent/WO2002076636A1/en not_active Application Discontinuation
- 2002-01-28 DE DE50202918T patent/DE50202918D1/en not_active Expired - Lifetime
- 2002-01-28 EP EP02710044A patent/EP1381477B1/en not_active Expired - Lifetime
- 2002-01-28 AT AT02710044T patent/ATE294029T1/en active
- 2002-01-28 ES ES02710044T patent/ES2240709T3/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO02076636A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2240709T3 (en) | 2005-10-16 |
DE50202918D1 (en) | 2005-06-02 |
ATE294029T1 (en) | 2005-05-15 |
WO2002076636A1 (en) | 2002-10-03 |
DE10114957C1 (en) | 2002-07-18 |
EP1381477B1 (en) | 2005-04-27 |
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