EP0325253B1 - Siebtrommel - Google Patents

Siebtrommel Download PDF

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Publication number
EP0325253B1
EP0325253B1 EP89100889A EP89100889A EP0325253B1 EP 0325253 B1 EP0325253 B1 EP 0325253B1 EP 89100889 A EP89100889 A EP 89100889A EP 89100889 A EP89100889 A EP 89100889A EP 0325253 B1 EP0325253 B1 EP 0325253B1
Authority
EP
European Patent Office
Prior art keywords
drum
annular
annular screen
section member
screening
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.)
Expired - Lifetime
Application number
EP89100889A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0325253A3 (en
EP0325253A2 (de
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.)
LT LINNHOFF MASCHINENBAU GmbH
Original Assignee
LT LINNHOFF MASCHINENBAU GmbH
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 LT LINNHOFF MASCHINENBAU GmbH filed Critical LT LINNHOFF MASCHINENBAU GmbH
Priority to AT89100889T priority Critical patent/ATE77977T1/de
Publication of EP0325253A2 publication Critical patent/EP0325253A2/de
Publication of EP0325253A3 publication Critical patent/EP0325253A3/de
Application granted granted Critical
Publication of EP0325253B1 publication Critical patent/EP0325253B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • 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
    • B07B1/18—Drum screens
    • B07B1/185—Drum screens provided with exchangeable sieve panels

Definitions

  • the invention relates to a screening drum according to the preamble of claim 1.
  • Such screening drums are known (EP-A-0.131.162) and are used, for example, to prepare the material of road surfaces using bitumen or on asphalt and grit of different grain sizes. Coarse grit grit is used to build a support structure, smaller grit grit is used to partially fill the cavities of the support structure and the bitumen penetrating into the remaining cavities is used to bind the other covering components.
  • a generic screening drum can be used to bring the individual components into the correct mixing ratio and, in particular, to prepare them by tempering in the heated mixing drum if the individual components of the road surface are to be applied to the road base at the same time.
  • the object of the invention is to design a generic device such that the individual ring screen sections can be assigned to the drum in a particularly expedient manner.
  • a "possible as possible” is understood in particular that the ring screen sections can be assembled and disassembled as quickly as possible and with a minimum of tooling, and that the assembled ring screens are reliably assigned to the drum in the assembled state.
  • the preparation of the mixed material is also to be improved, and the solution to this subtask is to arrange the entire drum including the sieves with the longitudinal axis inclined towards the horizontal.
  • a drum 2 with the longitudinal axis 3 is rotatably mounted about this longitudinal axis in a fixed housing 1.
  • a burner 4 whose longitudinal flame axis coincides with the longitudinal drum axis 3, projects into the drum 2 from the drum end shown on the left in the illustration.
  • the burner can basically be of any type and can be operated with gas or oil.
  • the drum 2 is driven by a motor (not shown) via a gear unit which includes a race 5 surrounding the drum and firmly connected to it.
  • a plurality of so-called hot silos 6 are arranged one after the other in the longitudinal direction of the drum on the housing 1.
  • These hot silos are funnel-shaped containers that are largely insulated from temperature radiation, which receive chips of different particle sizes emerging from the drum 1 mixed with bitumen or asphalt and place them on a conveyor belt for further processing.
  • circular screens 7 are arranged in succession in the longitudinal direction of the drum on the drum 2 such that an annular space 8 exists between the jacket of the drum 2 and the circular screens 7.
  • the circular sieves have different mesh sizes, the circular sieve 7a with the largest mesh size being on the right in the drawing, the circular sieve 7d with the smallest mesh size being on the left end of the drum 2 in the drawing.
  • the annular space 8 communicates with the interior of the drum 2 via openings 9 which are evenly distributed over the drum circumference at the drum end on the left in the drawing.
  • the dust and moisture is discharged through an exhaust stack 19 at the drum end of the feed device.
  • the central circular sieves 7 are attached to the drum 2 in accordance with the invention as shown in FIGS. 2-4.
  • Spacer pairs 22, 23 are arranged in the areas on both sides of the plane 21, which essentially determine the gap width between the drum 2 and the circular screens 7.
  • the spacer pairs 22, 23 are evenly distributed over the circumference of the drum 2 while maintaining large distances.
  • Each spacer 22 or 23 is an extruded profile running in the longitudinal direction of the drum with a U-shaped cross-section, the spacers of each pair of spacers following one another with their back 24 facing away from one another and with their radially inner flanges 25, while maintaining a relatively small distance in the circumferential direction of the drum are attached to the drum 2.
  • the length of each spacer (extruded profile) 22 or 23 corresponds approximately to the length of one of the circular screens 7.
  • a screen support 26 is arranged, which is an extruded profile with a flat cross section, which runs in the circumferential direction of the drum, the contour of which follows and at one end with the "one” and at the other end is firmly connected, in particular welded, to the "other" of the above-mentioned paired spacers which are U-shaped in cross section.
  • the circular sieves rest on the top of these flat sieve supports, which are rectangular in cross section, and on the outer flanges 25a of the spacers 22, 23.
  • each tension band is a spring steel strip which runs in the circumferential direction of the drum 2, and the length of which can be adjusted with a turnbuckle between its two ends so that the respective round screen end is held without play between the associated tension band and the associated sieve support.
  • angular holding means 28 are distributed in the initial state.
  • the horizontal leg 28a of the respective holding means is firmly connected to the tightening strap 27, for example welded.
  • the other leg 28b is directed radially outwards as a flange-like section and can be functionally regarded as part of the ring sieves after the tensioning band 27 has been applied and tightened.
  • This extruded profile 29 is firmly connected to the screen supports on its two sides, in particular welded to them.
  • the spacers 22, 23 are welded to the drum 2, the sieve supports 26 are welded to them, and the extruded profiles 29 are welded to them.
  • the drum 2 prepared in this way is now on both sides of an extruded profile 29 or between two in Drum longitudinal direction successive extruded profiles 29 inserted one of the rotary screens.
  • the tensioning band 27 with the holding means 28 is pulled up and down at each end of the respective screen.
  • the radially outwardly directed legs of the holding means 28 rest against the sides of the extruded profiles 29 without any play.
  • the material of the holding means 28 now allows the ends of the radially outwardly directed legs 28a (FIG.
  • the sieve drum in its entirety is inclined relative to the horizontal 30 in such a way that there is an angle ⁇ of approximately 4 ° between it and the longitudinal drum 3 such that the discharge end is higher than the end of the feed with the feed device 10.
  • This measure favors the Mixing of goods by increasing the length of time the goods stay in the drum and giving the goods a radial movement component.
  • a multi-start screw 31 is arranged in the annular space between the drum and the screen or the successive screen sections of different mesh sizes.
  • Each of the outlet openings 9 is assigned a channel between two screw flights. This means or results in an equalization the conveying of goods in the annular space, which favors the classification and the discharge of the classified goods into the hot silos 6.
  • Four outlet openings 9 and four screws 31 are preferably provided.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Road Paving Machines (AREA)
  • Valve Device For Special Equipments (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Auxiliary Devices For Music (AREA)
  • Storage Of Fruits Or Vegetables (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
  • Glass Compositions (AREA)
  • Centrifugal Separators (AREA)
EP89100889A 1988-01-19 1989-01-19 Siebtrommel Expired - Lifetime EP0325253B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89100889T ATE77977T1 (de) 1988-01-19 1989-01-19 Siebtrommel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3801383A DE3801383A1 (de) 1988-01-19 1988-01-19 Siebtrommel
DE3801383 1988-01-19

Publications (3)

Publication Number Publication Date
EP0325253A2 EP0325253A2 (de) 1989-07-26
EP0325253A3 EP0325253A3 (en) 1990-07-04
EP0325253B1 true EP0325253B1 (de) 1992-07-08

Family

ID=6345532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89100889A Expired - Lifetime EP0325253B1 (de) 1988-01-19 1989-01-19 Siebtrommel

Country Status (8)

Country Link
EP (1) EP0325253B1 (sv)
JP (1) JPH07106337B2 (sv)
AT (1) ATE77977T1 (sv)
DE (2) DE3801383A1 (sv)
DK (1) DK728288A (sv)
FI (1) FI91368C (sv)
NO (1) NO890225L (sv)
YU (1) YU11089A (sv)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4121585C1 (sv) * 1991-06-29 1992-08-06 Lintec Gmbh & Co Kg, 2114 Hollenstedt, De
DE4134194C1 (en) * 1991-10-16 1993-05-19 Bernhard Farwick Gmbh & Co Kg, 4740 Oelde, De Drum sifter with drum-shaped support - has fastening belt securing hooks at support, or segment retaining strips
AT2514U1 (de) * 1997-12-17 1998-12-28 Burgstaller Gmbh H Siebtrommel für trommelsiebmaschine
DE202007004462U1 (de) * 2007-03-19 2008-07-31 Gala Kunststoff- Und Kautschukmaschinen Gmbh Zentrifugaltrockner
CN106890786A (zh) * 2017-04-18 2017-06-27 石台依然农产品有限公司 一种新型茶叶分级机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1379550A (en) * 1920-10-25 1921-05-24 Baker Perkins Mfg Corp Flour-sifter
US1948606A (en) * 1931-01-12 1934-02-27 Arthur J Weinig Separating apparatus
JPS53150971U (sv) * 1977-05-06 1978-11-28
DE3135294A1 (de) * 1980-05-29 1983-03-24 Hannes-Jürgen 3000 Hannover Kapuschinski Siebvorrichtung
JPS5786670U (sv) * 1980-11-17 1982-05-28
DE3320682A1 (de) * 1983-06-08 1984-12-13 Linnhoff & Thesenfitz Maschinenbau GmbH, 2090 Winsen Vorrichtung zum aufbereiten von strassendeckenbelaegen

Also Published As

Publication number Publication date
YU11089A (en) 1991-04-30
FI91368B (sv) 1994-03-15
NO890225D0 (no) 1989-01-18
DK728288A (da) 1989-07-20
ATE77977T1 (de) 1992-07-15
DE3801383A1 (de) 1989-07-27
EP0325253A3 (en) 1990-07-04
FI91368C (sv) 1994-06-27
JPH01288379A (ja) 1989-11-20
JPH07106337B2 (ja) 1995-11-15
EP0325253A2 (de) 1989-07-26
NO890225L (no) 1989-07-20
DK728288D0 (da) 1988-12-29
FI890271A (sv) 1989-07-20
DE58901781D1 (de) 1992-08-13
DE3801383C2 (sv) 1991-03-21
FI890271A0 (sv) 1989-01-18

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