DK178512B1 - Apparatus and use thereof for separating fibre material - Google Patents

Apparatus and use thereof for separating fibre material Download PDF

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Publication number
DK178512B1
DK178512B1 DKPA201470735A DKPA201470735A DK178512B1 DK 178512 B1 DK178512 B1 DK 178512B1 DK PA201470735 A DKPA201470735 A DK PA201470735A DK PA201470735 A DKPA201470735 A DK PA201470735A DK 178512 B1 DK178512 B1 DK 178512B1
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DK
Denmark
Prior art keywords
drum
inner drum
outer drum
axis
propellants
Prior art date
Application number
DKPA201470735A
Other languages
Danish (da)
Inventor
Jes Rudebeck
Original Assignee
Jetek Rådgivende Maskiningeniør Aps
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 Jetek Rådgivende Maskiningeniør Aps filed Critical Jetek Rådgivende Maskiningeniør Aps
Priority to DKPA201470735A priority Critical patent/DK178512B1/en
Priority to EP15194965.8A priority patent/EP3025793A1/en
Application granted granted Critical
Publication of DK201470735A1 publication Critical patent/DK201470735A1/en
Publication of DK178512B1 publication Critical patent/DK178512B1/en

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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
    • B07B1/24—Revolving drums with fixed or moving interior agitators
    • 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
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14—Details or accessories
    • B07B13/16—Feed or discharge arrangements

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  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

An apparatus (1) for separating fibre material and the use thereof is disclosed, the apparatus comprising an inner drum (2) with openings (3) defined in the inner drum wall (4), the inner drum (2) being arranged to be rotated about a first axis by means of first drive means, an inlet opening (5) of the inner drum (2) through which said fibre material may be entered into the interior of the inner drum (2),an outer drum (7) which at least partially encompasses the inner drum (2), the outer drum (7) being arranged to be rotated about a second axis by means of second drive means, wherein the first drive means and the second drive means are arranged for rotating the inner drum (2) and the outer drum (7) individually and independently of each other, the outer drum (7) having an inner drum surface (9) provided with one or more conveying blades (10) extending inwardly, so that the rotation of the outer drum (7) will cause the blade(s) (10) to convey material on the inside of the outer drum (7) towards an outlet (11) end of the outer drum (7).

Description

Apparatus and use thereof for separating fibre material
The present invention relates to an apparatus and use thereof for separating fibre material, in particular for metering out material for being admixed in a concrete composition.
Background
Fibre reinforced concrete is becoming widespread used as the characteristics of the concrete compositions are improved. The fibres being micro or macro fibres of glass, plastics, steel, carbon or natural fibres or a mixture thereof and may be delivered as bulk material or in pucks, which are bundles of macro fibres held together by a plastic tape, and need to be separated in order to be measured out into the concrete mixture.
One apparatus for doing so is disclosed in Australian patent No. AU 642351 B2 comprising two drums, one inside the other, both having holes in the drums walls for the fibres to pass through when the drums are rotates or oscillated
An object of the present invention is to provide an apparatus and use of such apparatus for improved separation and handling of such fibre material, in particular where an improved precision in the metering out of the material can be provided.
Brief description of the invention
The present invention relates to an apparatus for separating fibre material comprising an inner drum with openings defined in the inner drum wall, the inner drum being arranged to be rotated about a first axis by means of first drive means, an inlet opening of the inner drum through which said fibre material may be entered into the interior of the inner drum, and an outer drum which at least partially encompasses the inner drum, the outer drum being arranged to be rotated about a second axis by means of second drive means, wherein the first drive means and the second drive means are arranged for rotating the inner drum and the outer drum individually and independently of each other, the outer drum having a preferably closed inner drum surface provided with one or more conveying blades extending inwardly, so that the rotation of the outer drum will cause the blade(s) to convey material on the inside of the outer drum towards an outlet end of the outer drum.
The first axis and the second axis of the respective drums may in a preferred embodiment extend in parallel and it is preferred that the first axis extend above the second axis so that more room is available between the inner drum and the outer drum to hold fibre material inside the outer drum during operation of the apparatus.
The apparatus may further comprise a weighing unit which has a receiving part arranged to receive material from the outlet end of the outer drum, and a weighing part for determining the weight of material received by said receiving part. The output from the weighing part may be used to control the operation of the rotation of the outer drum so as to perform a very precise metering out of fibre material onto the receiving part. It may also be employed to control the emptying of the receiving part into a concrete mixture when the requested amount of fibre material has been metered out. In a particular embodiment, the receiving part comprises a conveyor belt with drive means for emptying said receiving part of material.
At least some of the openings defined in the inner drum wall are in a preferred embodiment of an elongated shape, preferably an elliptical shape. The elongated openings are preferably arranged with the longer dimension in different directions so as to ensure a diverse orientation of the fibres moving into the outer drum from the inner drum. The longer dimension of the openings are typically between 1 and 4 times the shorter dimension (i.e. including round holes) and preferably from 1.5 to 3 times the shorter dimension, and in the order of 0.8 to 1.2 times the length of the fibres fed into the inner drum. Alternatively, the openings may be of a rectangular shape with similar ratios between the longer and the shorter dimensions of the openings.
The apparatus may furthermore comprise agitators extending inwardly from the inner drum wall so as to loosen pucks and bundles of fibres or separate entangles fibres when the inner drum is operated. In a particular embodiments, the agitators are constructed as conveying blades so that the rotation of the inner drum will cause the blades to convey material on the inside of the inner drum towards one end of the inner drum and ensure a more even distribution of the fibre material inside the inner drum.
In a preferred embodiment, the apparatus according further comprises control means for controlling at least said first drive means in response to measurements of the power consumption of the second drive means so than an increase in the power consumption will cause reduction of the speed of rotation of the inner drum.
In another preferred embodiement, the apparatus further comprises control means for controlling at least said second drive means in response to output from said weighing part, so that the speed of rotation of the outer drum is reduced when a predefined fraction of a required amount of fibre material has been received by said receiving part.
The present invention also relates to the use of an apparatus as disclosed herein for separation of fibre material to be added to a concrete composite material, wherein the fibre material is entered into the interior of the inner drum.
The fibres are preferably made from a plastics material, in particular from polypropylene.
In another embodiment, the apparatus is used for separating steel fibres.
However, the apparatus according to the present invention may also be used for separating and preferably metering out of fibres of different materials, such as plastic fibres and carbon fibres, glass fibres or natural fibres.
Although the apparatus according to the present invention may be used for separation and preferably metering out of micro fibres as well as a mixture of macro and micro fibres it is preferred that at least some of said fibres are of a length in the range of 25 to 75 millimetres and a width in the range of 0.5 to 1.5 millimetres, preferably of a length in the range of 35 to 65 millimetres, and preferably of a width in the range of 0.7 to 1.3 millimetres.
In a particularly preferred embodiment, the apparatus is used where the fibre material entered into the inner drum comprises bundles of macro fibres, in particular within the above-defined dimensions, which bundles are held together by a band material, i.e. a band of a thin plastic strip.
Brief description of the drawings
An embodiment of the present invention is shown in the enclosed drawing of which
Figure 1 is a perspective view of an apparatus according to the present invention comprising an inner drum and an outer drum,
Figure 2 is a cut-through perspective view of the apparatus of figure 1,
Figure 3 is a perspective view of the inner drum of the apparatus of figures 1 and 2, and
Figure 4 is a perspective view of the outer drum of the apparatus of figures 1 to 3. Description of preferred embodiments
The apparatus 1 shown in the enclosed drawing is one embodiment of the present invention, comprising an inner drum 2 with oval openings 3 in the inner drum wall 4, an inlet opening 5 at one end and an end wall 6 closing off the other end of the inner drum 2. The outer drum 7 has a closed outer drum wall 8, which on the inner side 9 is provided with helical conveyor blades 10 for driving the fibre material towards the outlet opening 11 of the outer drum 7 at one end of the outer drum 7. The opposite end of the outer drum 7 is provided with an end wall 12 with a central opening 13 so as to allow fibre material to be entered into the inner drum 2 through the inlet opening 5 thereof. The end wall 12 prevents fibre material inside the outer drum 7 to spill out at that end of the apparatus 1 during operation of it.
The inner drum 2 and the outer drum 7 are arranged to be rotated around a first axis and a second axis, respectively, where the second axis is situated parallel to but below the first axis to allow for fibre material to pile up on the inner side 9 of the outer drum 7. The second axis may furthermore or alternatively be displaced to one side with respect to the first axis to allow for piled-up fibre material, since the rotation of the outer drum 7 may cause a larger pile-up at one side of the outer drum 7. The inner drum 2 and the outer drum 7 are driven in the rotation about the respective axis independently by two drive arrangements (not shown) so that the rate of transfer of fibre material from the inner drum 2 to the outer drum 7 and the metering out of fibre material from the outer drum 7 to the receiving part (not shown) may be controlled independently of each other.
The openings 3 in the inner drum wall 4 are of elliptical shape with varying ratio between the longest and shortest dimension in the range of 3:1 to 1.5:1 and varying orientations which may be seen in Figs. 2 and 3.
During operation of the apparatus 1 for feeding macro fibres, such as polypropylene fibres of a length of 50 millimetres and a thickness of 1 millimetre, into a mixing of concrete, the macro fibres in bundles of fibres, typically of a diameter of 80 to 120 millimetres, such as 100 millimetres, held together by a strip of a thin, flexible plastics material are fed automatically or operator controlled into the interior of the inner drum 2 through the openings 3, 13 in the inner drum 2 and the outer drum 7 as indicated by the filled arrow in Figs. 1, 2 and 3, and the inner drum 2 is rotated to release the fibres from the bundles and from each other so that the single fibres can pass the openings 3 into the interior of the outer drum 7 as indicated by the nonfilled arrows of Fig. 3. The varying orientation of the openings 3 ensures that the fibres will have a broad distribution in direction in the outer drum 7 and when admixed into the concrete. The rotation of the inner drum 2 is controlled to ensure the required flow of fibres from the inner drum 2 into the outer drum7, such as a steady flow of fibres. The outer drum 7 is in one embodiment operated to rotate in response to the output from a weighing unit with a receiving part (not shown) for receiving the fibres from the outlet opening 11 of the outer drum 7 as indicated by the arrows in Fig. 4. The mixing of concrete is usually performed in batches, so that a very specific amount of fibres must be measured out for each batch, and the operation of the rotation of the outer drum 7 may be controlled to measure fibres out with a precision about 50 to 150 g, which is a high degree of precision as compared to other automatic methods. The conveyor blades 10 on the inside 9 of the outer drum 7 ensures the high precision in measuring out of fibre material through the outlet opening 11 of the outer drum 7.
In order to achieve the high precision in measuring out the correct amount of fibre material and at the same time ensure fast operation, the rotation of the outer drum 7 may in a first mode be relatively fast to measure out e.g. 60 to 85 % of the required amount and a subsequent mode with slower rotational speed of the outer drum 7 in order to precisely measure out the remaining amount.
In alternative embodiments, the inner drum 2 may be equipped with agitators on the inside of the drum wall 4 of the inner drum 2 so as to promote the loosening of the bundles of macro fibres and to separate such fibres or fibre that are fed into the inner drum 2 in other conditions, such as loose fibres which may be entangled. Such agitators may in particular be formed as conveyor blades so as to help distribute the fibres along the full longitudinal extent of the inner drum 2.
The apparatus may be employed for separating and metering out of micro fibres as described previously, but also for micro fibres or for a mixture of macro and micro fibres. The openings in the inner drum may be designed more specifically for the type of fibres to be separated by the apparatus.
The inner drum 2 may be driven in rotation in one direction or the other, or it may in operation be rotated back and forth.
The rotation of the inner drum 2 is in an embodiment controlled in response to measurements of the power consumption for rotation of the outer drum 7, the larger the power consumption is, the more material is carried by the outer drum 7 and the rotation of the inner drum 2 is reduced or even stopped at a higher power consumption for rotation of the outer drum 7 in order to reduce the flow of fibre material from the inner drum 2 to the outer drum 7. This is a simple manner for controlling the rotation of the inner drum 2 without the need for further sensors, encoders or the like.
Apart from the batch operation of the apparatus in metering out fibre material, the apparatus according to the present invention may also be employed for continuous operation, i.e. for a producing a continuous flow of fibres from the outlet opening 11 of the outer drum 7 into a continuous mixing process of concrete.
The apparatus may also be used for separating macro steel fibres and/or micro fibres of steel, micro fibres of plastics, such as polypropylene, and/or micro fibres of e.g. glass, carbon or natural fibres.
References 1 Apparatus 2 Inner drum 3 Openings in the inner drum 4 Inner drum wall 5 Inlet opening of inner drum 6 Closed end wall of inner drum 7 Outer drum 8 Outer drum wall 9 Inner side of outer drum wall 10 Conveyor blades 11 Outlet opening of outer drum 12 End wall of outer drum 13 Central opening in end wall of outer drum

Claims (15)

1. Indretning (1) til separering af fibermateriale, hvilken indretning omfatter en indvendig tromle (2) med åbninger (3), der er defineret i den indvendige tromlevæg (4), hvor den indvendige tromle (2) er indrettet til at blive roteret omkring en første akse ved hjælp af første drivmidler, en indgangsåbning (5) af den indvendige tromle (2), gennem hvilken fibermaterialet kan indføres i den indvendige tromles (2) indre, en udvendig tromle (7), der i det mindste delvist omgiver den indvendige tromle (2), hvor den udvendige tromle (7) er indrettet til at blive roteret omkring en anden akse ved hjælp af anden drivmidler, hvor de første drivmidler og de anden drivmidler er indrettet til at rotere den indvendige tromle (2) og den udvendige tromle (7) enkeltvist og uafhængigt af hinanden, hvor den udvendige tromle (7) har en indvendig tromleflade (9), der er forsynet med en eller flere medbringerblade (10), der strækker sig indad, således at rotationen af den udvendige tromle (7) får bladet eller bladene (10) til at transportere materiale på indersiden af den udvendige tromle (7) mod en udgangsende (11) af den udvendige tromle (7).A fiber material separation device (1) comprising an inner drum (2) with apertures (3) defined in the inner drum wall (4), wherein the inner drum (2) is arranged to be rotated about a first axis by first driving means, an inlet opening (5) of the inner drum (2) through which the fiber material can be introduced into the interior of the inner drum (2), an outer drum (7) at least partially surrounding the inner drum (2), wherein the outer drum (7) is arranged to be rotated about a second axis by means of second propellants, the first propellants and second propellants being adapted to rotate the inner drum (2); the outer drum (7) individually and independently of each other, the outer drum (7) having an inner drum surface (9) provided with one or more carrier blades (10) extending inwardly so that the rotation of the outer drum drum (7) causes the blade (s) (10) to transport material on the inside of the outer drum (7) toward an outlet end (11) of the outer drum (7). 2. Indretning ifølge krav 1, hvor den første akse og den anden akse strækker sig parallelt med hinanden.Device according to claim 1, wherein the first axis and the second axis extend parallel to each other. 3. Indretning ifølge krav 1 eller 2, hvor den første akse strækker sig over den anden akse.Device according to claim 1 or 2, wherein the first axis extends over the second axis. 4. Indretning ifølge et af kravene 1 til 3, endvidere omfattende en vejeenhed med en modtagedel, der er indrettet til modtagelse af materiale fra den udvendige tromles udgangsende, og en vejedel til bestemmelse af vægten af materialet, der modtages af modtagedelen.Device according to one of claims 1 to 3, further comprising a weighing unit with a receiving part adapted to receive material from the output end of the outer drum and a weighing part for determining the weight of the material received by the receiving part. 5. Indretning ifølge krav 4, hvor modtagedelen omfatter et transportbånd med drivmidler til tømning af modtagedelen for materiale.Device according to claim 4, wherein the receiving part comprises a conveyor belt with propellants for emptying the receiving part for material. 6. Indretning ifølge et af de foregående krav, hvor mindst nogle af åbningerne (3), der er defineret i den indvendige tromlevæg (4), har en aflang form, fortrinsvis ellipseform.Device according to one of the preceding claims, wherein at least some of the openings (3) defined in the inner drum wall (4) have an elongated shape, preferably an ellipse shape. 7. Indretning ifølge et af de foregående krav, endvidere omfattende agitatorer, der strækker sig indad fra den indvendige tromlevæg (4).Device according to one of the preceding claims, further comprising agitators extending inwards from the inner drum wall (4). 8. Indretning ifølge krav 7, hvor agitatorerne er udformet som medbringerblade, således at rotation af den indvendige tromle (2) får bladene til at transportere materiale på indersiden af den indvendige tromle (2) mod en ende af den indvendige tromle.Device according to claim 7, wherein the agitators are formed as carrier blades, so that rotation of the inner drum (2) causes the blades to transport material on the inside of the inner drum (2) towards one end of the inner drum. 9. Indretning ifølge et af de foregående krav, endvidere omfattende styremidler til styring af mindst de første drivmidler som reaktion på målinger af de anden drivmidlers effektforbrug, således at en forøgelse af effektforbruget vil medføre reduktion af rotationshastigheden af den indvendige tromle (2).Device according to one of the preceding claims, further comprising control means for controlling at least the first propellants in response to measurements of the power consumption of the second propellants, so that an increase in power consumption will result in a reduction of the rotational speed of the inner drum (2). 10. Indretning ifølge et af kravene 4 til 9, endvidere omfattende styremidler til styring af mindst de anden drivmidler som reaktion på vejedelens output, således at rotationshastigheden af den udvendige tromle (7) reduceres, når en forudbestemt andel af en påkrævet mængde fibermateriale er blevet modtaget af modtagedelen.Device according to one of claims 4 to 9, further comprising control means for controlling at least the other propellants in response to the output of the weighing part, so that the rotational speed of the outer drum (7) is reduced when a predetermined proportion of a required amount of fiber material has been received by the receiving part. 11. Anvendelse af en indretning ifølge et af kravene 1 til 10 til separering af fibermateriale, der skal tilsættes til et betonkompositmateriale, hvor fibermaterialet indføres i den indvendige tromles (2) indre.Use of a device according to one of claims 1 to 10 for separating fiber material to be added to a concrete composite material, wherein the fiber material is introduced into the interior of the inner drum (2). 12. Anvendelse ifølge krav 11, hvor fibrene er fremstillet af plastmateriale, især af polypropylen.Use according to claim 11, wherein the fibers are made of plastic material, especially of polypropylene. 13. Anvendelse ifølge krav 11, hvor fibrene er fremstillet af stål.Use according to claim 11, wherein the fibers are made of steel. 14. Anvendelse ifølge et af kravene 11 til 13, hvor fibrene har en længde i området 25 til 75 millimeter og en bredde i området 0,5 til 1,5 millimeter.Use according to any one of claims 11 to 13, wherein the fibers have a length in the range 25 to 75 millimeters and a width in the range 0.5 to 1.5 millimeters. 15. Anvendelse ifølge et af kravene 11 til 14, hvor fibermaterialet, der indføres i den indvendige tromle, omfatter bundter af fibre, som holdes sammen af et båndmateriale.Use according to one of claims 11 to 14, wherein the fiber material introduced into the inner drum comprises bundles of fibers held together by a band material.
DKPA201470735A 2014-11-25 2014-11-25 Apparatus and use thereof for separating fibre material DK178512B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DKPA201470735A DK178512B1 (en) 2014-11-25 2014-11-25 Apparatus and use thereof for separating fibre material
EP15194965.8A EP3025793A1 (en) 2014-11-25 2015-11-17 Apparatus and use thereof for separating fibre material

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Application Number Priority Date Filing Date Title
DKPA201470735A DK178512B1 (en) 2014-11-25 2014-11-25 Apparatus and use thereof for separating fibre material

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DK201470735A1 DK201470735A1 (en) 2016-04-25
DK178512B1 true DK178512B1 (en) 2016-04-25

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Publication number Priority date Publication date Assignee Title
IT202000028850A1 (en) * 2020-11-27 2022-05-27 White Black Slag Tech S R L Improved Selection Apparatus
JP7083120B1 (en) * 2021-12-24 2022-06-10 株式会社デーロス・ジャパン Fiber reinforced concrete manufacturing equipment for narrow spaces and tunnel lining regeneration method under traffic operation using the equipment
JP7123328B1 (en) * 2021-12-24 2022-08-23 株式会社デーロス・ジャパン Apparatus for distributing short fibers for concrete reinforcement and method for distributing them

Citations (5)

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Publication number Priority date Publication date Assignee Title
GB775722A (en) * 1954-05-22 1957-05-29 Algemeene Kunstvezel Mij Naaml Improvements in apparatus for the preparation of mats of mineral fibre
US2985302A (en) * 1958-03-10 1961-05-23 Automatic Poultry Feeder Compa Means for separating foreign matter from feed
US4592115A (en) * 1984-12-18 1986-06-03 Mo Och Domsjo Ab Apparatus and process for separating cellulose fluff fibers from waste fibrous material
AU642351B2 (en) * 1991-07-22 1993-10-14 Rocla Pty Limited Particle of fibre separating apparatus
DE19819866C1 (en) * 1998-05-04 1999-04-15 Reimelt Dietrich Kg Sieve arrangement for working with granular or powdered material

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Publication number Priority date Publication date Assignee Title
GB2277044A (en) * 1993-04-16 1994-10-19 Qed Int Ltd Removal of metal particles from drilling mud
FR2745204B1 (en) * 1996-02-26 1998-04-03 Cogema DEVICE FOR SEPARATING AND DOSING OBJECTS OF DIFFERENT SIZES SUCH AS SHELLS AND FITTINGS FROM SHEARING IRRADIATED NUCLEAR FUEL ASSEMBLIES

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB775722A (en) * 1954-05-22 1957-05-29 Algemeene Kunstvezel Mij Naaml Improvements in apparatus for the preparation of mats of mineral fibre
US2985302A (en) * 1958-03-10 1961-05-23 Automatic Poultry Feeder Compa Means for separating foreign matter from feed
US4592115A (en) * 1984-12-18 1986-06-03 Mo Och Domsjo Ab Apparatus and process for separating cellulose fluff fibers from waste fibrous material
AU642351B2 (en) * 1991-07-22 1993-10-14 Rocla Pty Limited Particle of fibre separating apparatus
DE19819866C1 (en) * 1998-05-04 1999-04-15 Reimelt Dietrich Kg Sieve arrangement for working with granular or powdered material

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EP3025793A1 (en) 2016-06-01

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