WO1989003914A1 - Convoyeur malaxeur a chaud pour fabrication en continu d'asphalte routier ou d'asphalte coule - Google Patents

Convoyeur malaxeur a chaud pour fabrication en continu d'asphalte routier ou d'asphalte coule Download PDF

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Publication number
WO1989003914A1
WO1989003914A1 PCT/EP1988/000924 EP8800924W WO8903914A1 WO 1989003914 A1 WO1989003914 A1 WO 1989003914A1 EP 8800924 W EP8800924 W EP 8800924W WO 8903914 A1 WO8903914 A1 WO 8903914A1
Authority
WO
WIPO (PCT)
Prior art keywords
drum
heating
tubular shaft
conveyor according
asphalt
Prior art date
Application number
PCT/EP1988/000924
Other languages
German (de)
English (en)
Inventor
Karl Martin Stahl
Original Assignee
Karl Martin Stahl
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 Karl Martin Stahl filed Critical Karl Martin Stahl
Publication of WO1989003914A1 publication Critical patent/WO1989003914A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/104—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers
    • E01C19/1045—Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers the mixture being discharged continuously

Definitions

  • the invention relates to a heating mixer conveyor for the continuous production of road asphalt or mastic asphalt by heating, crushing and mixing fresh material and / or ground road asphalt breakup in a directly or indirectly heated drum, containing a driven and rotating conveyor, a filling opening and one
  • Road asphalt with a bitumen content of approximately 3% by weight or mastic asphalt with a bitumen content of approximately 10% by weight is usually produced in batches in a heating mixer (boiler).
  • the invention has for its object to provide a device with the continuous road or mastic asphalt Combinations of these materials can be made from both fresh materials and ground asphalt.
  • the invention is intended to make it possible to recycle the waste material, as it occurs in large quantities on construction sites, and to reuse it. It is the task of the device to heat up the waste material, to crush it, to mix it and, if necessary, to make it operational again by adding binders.
  • the device according to the invention is intended to work in such a way that overheating of the material is avoided in any case and the heating, comminution, mixing can be carried out in a single device until the continuous dispensing of a directly usable product.
  • the invention proposes a heating mixer conveyor of the generic type, in which the conveyor element is heatable as a double-walled tubular shaft with a heating chamber D arranged between an outer jacket tube and an inner jacket tube, and the tubular drum surrounding the tubular shaft is equipped with heating chambers E and that as through the heating chambers E, D in the forced circulation heating medium is provided to a temperature below the decomposition temperature of the asphalt or bitumen liquid is provided.
  • Suitable heating media and heat transfer media are, for example, suitable thermal oils that are heated to a temperature not exceeding 250 ° C. for recycling asphalt. This heating temperature precludes any decomposition and change in the binder contained in the asphalt mixture, such as bitumen.
  • any indirect overheating of the material to be processed is avoided by the indirect heating and heating of the fresh material or asphalt opening via the contact heat emitted by the drum and the tubular shaft. Since no hot gases flow through the material to be processed, no dust is removed.
  • the heating of the heating mixer conveyor according to the invention takes place on the one hand from the inside with the aid of a sufficiently large double-walled tubular shaft and from the outside enclosing the mixing chamber Heating chambers of the drum formed heating area.
  • Both street asphalt and mastic asphalt can be produced continuously with the device according to the invention.
  • Starting material can be fresh material and / or old material, i.e. Road asphalt departure.
  • the recycling material with the device according to the invention is suitable both for direct reinstallation and as an excellent addition of raw materials in large asphalt mixing plants. This means that road asphalt demolition can be completely and fully recycled.
  • the device according to the invention thus makes a contribution to environmental protection, there are large waste dumps and the recycling takes place without environmental pollution by gases and dust.
  • the tubular shaft as a conveying element is also designed as a comminuting and mixing element by means of specially shaped blades or paddles attached on the outside.
  • worm blades with a conveying effect are fastened and in the area in between, preferably in alternating sequence, spade-shaped paddles and V -shaped paddles attached for mixing and crushing.
  • AI 1 e ⁇ Paddles and paddles are provided in a helical arrangement on the outer casing tube.
  • the heating mixer conveyor according to the invention is intended to enable a long dwell time of the break-up material to completely carry out the slow melting and sufficient comminution. For this reason, for the conveyance of the demolition material in the heating mixer conveyor, ie in the drum, screw blades or worm blades are provided only in the entrance area and in the discharge area, while in the entire central part the chunks of the demolition material are now and then Fly here, crushed, warmed and only slowly conveyed on.
  • the spade-shaped paddles are used for kneading, the toothed paddles serve as impact tooth paddles, in particular in cooperation with webs which act as breaking teeth on the inside of the drum and engage in the V-shaped paddles to break up and crush the material.
  • the device according to the invention thus also counteracts a new formation of lumps. - Even larger stones as foreign bodies ' are broken in the heating mixer conveyor and adapted to the recycling material.
  • the drum with the tubular shaft inclines from the inlet opening to the outlet opening from the horizontal by a small angle CC of approximately I to 3 ° with a gradient is arranged.
  • a slight incline is sufficient to achieve the desired conveyance of the material carried up, but at the same time to ensure that the material remains in the heating mixer conveyor for as long as possible, i.e. is slowly and continuously conveyed through the drum to achieve the longest possible heating-up time.
  • the drum with a tubular shaft is designed to be adjustable from the horizontal, for example by means of a spindle or other mechanical or hydraulic lifting elements, such as lifting cylinders.
  • the entire heating mixer conveyor can therefore be adjusted in a desired inclined position in order to force a small feed by the material falling freely.
  • At least part of the upper drum is designed to be hinged.
  • the drum in the horizontal is divided into the longitudinal extent and is formed in the areas between the inlet opening and the outlet opening with an overhead separate half-shell, which is articulated and hinged along one side in the longitudinal extension of the drum and hinged to the lower remaining half-shell of the drum.
  • the half-shell can be opened mechanically or hydraulically, for example, a hydraulic device with a lifting cylinder can be provided, which is connected to the half-shell to be opened via tilting bearings.
  • At least one vapor outlet e.g. an outlet pipe or the like, is provided on the top of the drum.
  • this, for example bitumen can be dosed in small quantities hot or cold in comminuted form with the demolition material directly into the inlet opening of the drum.
  • a separate feed device for binders in particular liquid bitumen, for example an atomizing device.
  • This facility is preferably near the end of discharge, i.e. the outlet opening of the drum, where the processed material arrives in shredded form.
  • a tubular shaft end piece is inserted into the inner casing tube at each end of the tubular shaft, with which the tubular shaft is supported in end-side end shields which close the drum ends.
  • a pipeline which lies coaxially through the tubular shaft and in the region of the inlet opening of the drum Rohrwel 1 end piece is guided and is connected at the end in the region of the outlet opening of the drum via a passage with the heating chamber of the tubular shaft.
  • the heating medium can flow back through the heating chamber through the pipeline guided inside the tubular shaft from the rear end of the tubular shaft and can be discharged again via a passage connecting the heating chamber with an outlet line.
  • Two heating circuits are preferably provided for uniform heating of the drum.
  • the heating chambers of the drum lying below the horizontal central plane of the drum are connected in one heating medium circulation with a pipeline and a return line and the heating chambers lying above the horizontal central plane are connected in a further heating medium circulation with a pipeline and a return line are.
  • the heating chamber formed in the movable half-shell is connected to the adjacent heating chambers by means of an elastically movable pipe loop running outside the drum.
  • the temperature of the heating medium for example thermal oil
  • the temperature of the heating medium must be kept very constant, in all flow areas both in the tubular shaft and in the drum, in order to avoid deformations of the device parts due to uneven thermal expansion. It is advisable to provide temperature control for the heating medium.
  • FIG. 1 shows a longitudinal section in view through the heating mixer conveyor with drum and tubular shaft
  • FIG. 2 shows the cross section ON according to FIG. 1 with the drum upper part additionally opened
  • FIG. 3 shows the cross section XY according to FIG. 1
  • FIG 4 is a schematic view of the heating mixer conveyor according to Figure 1 with lifting device
  • Figure 5 shows a schematic cross section through drum with tubular shaft and paddles perpendicular to the longitudinal axis
  • Figure 6 schematically shows a top view of a V-shaped paddle
  • FIG. 8 shows a cross section analogous to FIG. 2 with demolition material al.
  • FIG. 1 to 3 show an embodiment of a heating mixer conveyor according to the invention for recycling street asphalt in partially schematic cross sections.
  • the mixing chamber V is located between the inner wall of the drum 3 and the tubular shaft 11.
  • the cylindrical drum 3 is closed at the end with the two end shields 1, 2, which have the bearing bushes la, 2a centrally around the longitudinal axis H, in which the tubular shaft is guided and is stored.
  • the drum as well as the tubular shaft 11 are divided into three sections, the entrance area with the inlet opening F for the material to be recycled, the middle area for heating, crushing and mixing and the Discharge area with the outlet opening G for the recycling material.
  • the drum 3 is formed horizontally divided in the longitudinal extent to its longitudinal axis H.
  • the upper part of the drum is designed as a hinged half-shell 3b.
  • the edge-side drum parts 3c and 3d and the lower half-shell 3a are firmly connected to one another. All areas of the drum are heated.
  • the drum walls are double-walled with the heating jackets 4 and form cylindrical shells with the heating chambers E, i.e. Ea in the lower and Eb, Ec, Ed in the upper half of the drum.
  • the heating medium e.g.
  • Oil via pipes not shown in the direction of arrow S, the heating chambers Ec, Eb, Ed of the upper half of the drum and R to the heating chambers Ea of the lower half of the drum and at the end, as indicated by the arrows T and U, removed and the heating unit for reheating forwarded.
  • the discharge pipe 21 for vapors and vapors is provided in the upper drum shell 3b against the discharge end of the drum.
  • the injection device 25 is provided near the discharge end of the drum, with which the missing binder can be metered directly into the mixing chamber.
  • the hinged drum shell 3b is mounted on both sides between the flange support pieces 5, 6, which are connected to the tilting bearings 22, on which hydraulically actuated lifting cylinders 23, which are supplied by a hydraulic unit 26, are articulated.
  • Figure 3 shows the lifting cylinder in the extended state, i.e. in the closed state of the drum, while Figure 2 shows the lifting cylinder 23 in the retracted state, i.e. shows in the opened state of the drum.
  • the heating oil lines from the heating chamber Ec to the heating chamber Eb and from the heating chamber Eb to the heating chamber Ed are designed as elastically movable pipe loops, which are not shown here, and bridge the flange support pieces 5, 6 from the outside.
  • the drum 3, ie all parts 3a to 3d of the drum, is covered on the outside with a thermal insulation layer 24.
  • the tilting device 22, 23, 26, the drum shell 3b is, for example, attached to the stands 14, 15, which simultaneously support the drum.
  • the double-walled, heatable tubular shaft has the outer jacket tube 11 and the inner jacket tube 10, between which the tube-shaped heating chamber D is created, through which the heating medium is guided.
  • the crushing and conveying elements such as worm blades 19, spade-shaped paddles 20, fang-tooth paddles 20a and V-shaped press paddles 20b, see FIG. 6, are attached.
  • the material to be processed is heated via the contact heat on the inside of the drum and the outside of the outer casing tube 11 of the tubular shaft.
  • a tubular shaft end piece 7, 8 is inserted into the inner jacket tube, the outwardly projecting end of which forms the bearing shaft in the end shields 1, 2 of the drum.
  • tubular shaft end pieces 7, 8 are each firmly connected to the inner casing tube 10 by means of supporting cross members 9.
  • the tubular shaft end pieces also serve to transport the heating medium.
  • the pipeline 12 is provided, which runs coaxially to the longitudinal axis H of the tubular shaft and leads from the rotor stuffing box 18 through the tubular shaft end piece 8 on the input side of the drum through the tubular shaft 11, 10 to the tubular shaft end piece 7.
  • the rotor stuffing box 18 is fastened to the end shield 1 by means of the bracket 17.
  • the tubular shaft 11 is driven by the gears 16 by a motor, not shown.
  • the heating medium is now introduced in direction A through the rotor stuffing box 18 into the pipe 12, flows through the pipe into the pipe shaft end piece 7, see arrow B.
  • the interior of the pipe shaft end piece 7 is connected via passage 71 to the heating chamber D of the pipe shaft .
  • the heating oil flows into the heating chamber D and from here in the opposite direction of the recycling material back to the input side, ie to the tubular shaft end piece 8.
  • the heating chamber D is via a further passage 82 with an outlet line 82 provided in the tubular shaft end piece 8 connected via which the heating medium flows back into the rotor stuffing box 18 and exits here in the direction of arrow C and is fed back to the heating device.
  • the schematically indicated swirl guide 13 is provided in the form of a spiral which continuously connects the walls of the outer jacket tube 11 and the inner jacket tube 10.
  • the heating mix conveyor can at a temperature of the heating medium up to a maximum of 250 ° C about 20 t each Recycle one hour of asphalt.
  • the tubular shaft is occupied with, for example, 8 paddles per circumference. A total of approx. 160 paddles and the snail wings are provided.
  • the paddles and wings are provided with wear layers on the work surfaces and edges, for example hard metal pads.
  • simple mixing paddles for example spade-shaped paddles 20 and press paddles 20b according to FIG. 6, are provided in an alternating sequence of the gradients.
  • the V-shaped ' press paddles 20b see FIG. 6, which are welded onto the top of the tubular shaft 11, for example, work with webs or projections or teeth which are welded onto the inside of the drum 3 20c together.
  • the paddles 20 can have a suitable shape adapted to the material to be processed.
  • FIG 4 is a schematic front view of the Schumischer 100 with drum 3 shown inlet for 'the material F, G outlet opening, with a lifting device for tilting the Schumisch machineers.
  • the inclination is at a very small angle oC from the horizontal I, so that the longitudinal axis of the tubular shaft runs under the drum with a slight slope and thus produces a low free-fall feed for the material to be conveyed.
  • the drum is mounted in the area of the outlet opening via a pivot point 30 and is adjusted at the other end in the area of the inlet opening by means of a lifting device, for example mechanically or hydraulically actuated spindle 23, which is guided between the plates 28 and 29.
  • a lifting device for example mechanically or hydraulically actuated spindle 23
  • heating medium circulation in the upper and lower half of the drum is shown schematically. For the top one
  • the heating oil at S is fed through a pipe, at the apex, and then near the
  • Heating chamber Eb of the hinged drum shell 3b initiated.
  • Pipe loop 32 which connects to the fixed upper heating chamber Ed near the parting plane, in order to leave this heating chamber Ed again at the apex with the return line.
  • Drum shell takes place alternately from the apex to
  • FIG. 7 shows a plant for recycling road asphalt with a heating mixer conveyor 100 according to the invention.
  • the task of opening the road M takes place via the conveyor 50 into the grinder 51 for a grain size of 1 to 40 mm.
  • the ground material is in via the elevator 52 in . metered the inlet opening F of the heating mixer conveyor.
  • the Schumischf ⁇ rderer is ' fed by the thermal oil heater 54 via the pipes A, R and S and the thermal oil via the pipes C, T and U returned. If required, 25 hot bitumen can be added in fine doses via the injection device.
  • the recycled directly reusable material comes from * em Banker in the filling and loading silo 53rd

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)

Abstract

Convoyeur malaxeur à chaud pour recyclage de brisures d'asphalte routier, comportant un tambour chauffant (3) chauffé indirectement de l'intérieur (D) et de l'extérieur (E) ainsi qu'un arbre tubulaire (11) à double paroi pourvu d'aubes hélicoïdales (19) et d'ailettes (20) de forme différente pour transporter, broyer et malaxer.
PCT/EP1988/000924 1987-10-22 1988-10-15 Convoyeur malaxeur a chaud pour fabrication en continu d'asphalte routier ou d'asphalte coule WO1989003914A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873735740 DE3735740A1 (de) 1987-10-22 1987-10-22 Heizmischfoerderer fuer strassenasphalt-recycling
DEP3735740.9 1987-10-22

Publications (1)

Publication Number Publication Date
WO1989003914A1 true WO1989003914A1 (fr) 1989-05-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1988/000924 WO1989003914A1 (fr) 1987-10-22 1988-10-15 Convoyeur malaxeur a chaud pour fabrication en continu d'asphalte routier ou d'asphalte coule

Country Status (2)

Country Link
DE (1) DE3735740A1 (fr)
WO (1) WO1989003914A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536974A2 (fr) * 1991-10-07 1993-04-14 Rap Process Machinery Corp. Appareil et procédé pour le recyclage d'asphalte
US7384181B1 (en) * 2004-04-05 2008-06-10 Collette Jerry R Milled asphalt pavement recycling
WO2014168477A1 (fr) * 2013-04-08 2014-10-16 Koninklijke Bam Groep N.V. Composition de mastic pour des mélanges d'asphalte et procédé de fabrication d'une telle composition de mastic
US20150059620A1 (en) * 2012-09-06 2015-03-05 D&H Equipment, LTD Horizontal mixer for bituminous mixtures
CN109235190A (zh) * 2018-09-19 2019-01-18 深圳市润源建筑工程有限公司 一种市政工程建筑的沥青铺设设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9111681U1 (de) * 1991-09-19 1993-02-18 Westhydraulik-Becker Behälter-, Apparate- und Stahlbau Dresden GmbH, 02894 Buchholz Beheizbarer isolierter Behälter, insbesondere für die Aufnahme und den Transport von Heißasphalt oder Heißbitumen
CN111794047A (zh) * 2020-07-22 2020-10-20 江西际洲建设工程集团有限公司 一种沥青回收装置
CN112878143B (zh) * 2021-01-18 2022-08-19 四川科路泰交通科技有限公司 一种沥青再生设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2256281A (en) * 1940-03-25 1941-09-16 Sam E Finley Apparatus for preparing bituminous cement aggregate compositions
DE2606647A1 (de) * 1976-02-19 1977-08-25 Luther Werke Kontinuierlich arbeitender kontakttrockner
US4272212A (en) * 1979-06-15 1981-06-09 Andrew J. Bauer, Jr. Method and apparatus for rejuvenating and recycling asphalt
GB2115711A (en) * 1982-01-27 1983-09-14 Ben Travis A highway asphalt and coated a recycling machine
EP0146939A2 (fr) * 1983-12-29 1985-07-03 Deutag-Mischwerke GmbH Dispositif et procédé de chauffage d'asphalte concassé

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2256281A (en) * 1940-03-25 1941-09-16 Sam E Finley Apparatus for preparing bituminous cement aggregate compositions
DE2606647A1 (de) * 1976-02-19 1977-08-25 Luther Werke Kontinuierlich arbeitender kontakttrockner
US4272212A (en) * 1979-06-15 1981-06-09 Andrew J. Bauer, Jr. Method and apparatus for rejuvenating and recycling asphalt
GB2115711A (en) * 1982-01-27 1983-09-14 Ben Travis A highway asphalt and coated a recycling machine
EP0146939A2 (fr) * 1983-12-29 1985-07-03 Deutag-Mischwerke GmbH Dispositif et procédé de chauffage d'asphalte concassé

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536974A2 (fr) * 1991-10-07 1993-04-14 Rap Process Machinery Corp. Appareil et procédé pour le recyclage d'asphalte
EP0536974A3 (fr) * 1991-10-07 1993-05-05 Rap Process Machinery Corp. Appareil et procédé pour le recyclage d'asphalte
US7384181B1 (en) * 2004-04-05 2008-06-10 Collette Jerry R Milled asphalt pavement recycling
US20150059620A1 (en) * 2012-09-06 2015-03-05 D&H Equipment, LTD Horizontal mixer for bituminous mixtures
WO2014168477A1 (fr) * 2013-04-08 2014-10-16 Koninklijke Bam Groep N.V. Composition de mastic pour des mélanges d'asphalte et procédé de fabrication d'une telle composition de mastic
CN109235190A (zh) * 2018-09-19 2019-01-18 深圳市润源建筑工程有限公司 一种市政工程建筑的沥青铺设设备

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