EP0837187A2 - Fibre delivery system for asphalt production - Google Patents
Fibre delivery system for asphalt production Download PDFInfo
- Publication number
- EP0837187A2 EP0837187A2 EP97402440A EP97402440A EP0837187A2 EP 0837187 A2 EP0837187 A2 EP 0837187A2 EP 97402440 A EP97402440 A EP 97402440A EP 97402440 A EP97402440 A EP 97402440A EP 0837187 A2 EP0837187 A2 EP 0837187A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- hopper
- bale
- rollers
- fibrous material
- asphalt
- 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
Images
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
- E01C19/46—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 and placing the materials, e.g. slurry seals
-
- 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
- E01C19/1059—Controlling the operations; Devices solely for supplying or proportioning the ingredients
- E01C19/1068—Supplying or proportioning the ingredients
- E01C19/1072—Supplying or proportioning the ingredients the solid ingredients
Definitions
- Fibre-containing asphalt is normally produced as a hot thermoplastic material in a fixed blending plant, and then transported to site in an insulated vehicle. The hot thermoplastic asphalt is then applied to the substrate through conventional asphalt pavers.
- the fibre additions are generally between 0.1% and 0.5% and it has been found that only some types of fibres are suitable.
- the fibre size is usually between 2mm and 6mm long with a diameter ranging from 1 ⁇ to 100 ⁇ .
- the fibre metering equipment is designed to maintain the fibres in a loose form by containing them in an agitated hopper equipped with paddles or the like.
- the loose material is then metered into the road composition manufacturing equipment via a rotary valve device or screw arrangement.
- the present invention provides a compact storage and delivery system capable of accepting the fibrous material as high density packaged bales, and then breaking up the material into a loose form, and metering it in terms of mass-or-volume to ensure the correct dosing level.
- the whole assembly is suitable for integration into a mobile continuous mixing cold asphalt machine designed to mix asphalt materials and apply them as a road surfacing product.
- the container (1) is designed to accommodate one or more fibre bales (20) as well as form a structure to enclose and support the mechanism necessary for metering and delivering the fibres.
- Items (2) to (7) form a press mechanism which forces the bales, in a controlled manner, onto a set of contra-rotating spiked, or barbed, rollers (8) and (9).
- spiked rollers tear and break up the material from the bale (20) and transport it into a void situated above the metering delivery auger (10).
- the drive system is by chains (12) (13), powered by an hydraulic or electric motor (11) and tensioned by idle sprocket (14).
- the auger is geared to rotate faster than the speed of the spiked rollers to prevent material jamming.
- Bearings (15), (16), (17) and (18) attached to the container (1) support the spiked rollers and auger.
- Auger (10) can be of progressive nature to avoid jamming.
- Material is delivered through duct (19).
- the metering rollers (8) and (9) are equipped with pointed spikes, typically of round cross-section, and upto around 10 mm, eg. 4-5mm, long and upto 5 mm, eg. around 1.5mm, in diameter. They are preferably spaced at 5-15 mm, eg. 12mm, centres both longitudinally and circumferentially.
- the feeding system consists of a platen (2), square guide tube (3) with slot (4) and guide plug (5) connected to platen (2) via gusset (6).
- Platen (2) and gusset (6) can be raised out of engagement of slot (4) and rotated through 180° to enable loading of fresh bales.
- platen (2) can be weighted with mass (21).
- Figure 2A shows an electric motor (30) driving a lead screw (31) which controls the feed rate of platen (32) via plug nut (33) which is constrained by guide tube (34) and slot (35).
- Figure 2B shows an hydraulic cylinder (40) which controls the feed rate of Platen (41) through lead screw (42) contained in guide tube (44).
- the platen can be rotated 180° for loading when clear of container (1).
- Hinged lid (50) is designed to reduce the ingress of rain etc.
- the design has been changed to eliminate the auger metering device and use the spiked rollers only to meter the material as well as process the compacted material into a form suitable for admixing. All other aspects of the system are the same as for the first embodiment.
- FIG. 3 shows the second embodiment with the fibrous material (1) contained in the hopper (2) which also forms the support structure for the spiked rollers (3) which are geared together (4) to give contra rotation.
- the drive system which can take the form of either an electric or hydraulic motor (5) of variable speed.
- Chain and sprocket transmission (6) is capable of rotating the spiked rollers typically from 10 rpm to 300 rpm.
- the mechanism for pressing a bale onto the spiked rollers is not shown, but is the same as that used in the first embodiment.
- Fibrous material is delivered in suitable form from the base of the hopper and the delivery rate is proportional to the rotational speed of the spiked rollers and the force with which the compacted fibrous bale is applied to the roller.
- Hopper (2) is designed such that its height is sufficient to prevent human contact with the rotating spiked rollers.
- the metered and processed fibrous material can be delivered directly to the mixing facility by gravity, or, the metered and processed material issuing from the hopper can be deposited on a feeding means.
- the endless conveyor belt (7) is an existing part of the surfacing machine, used to transport aggregate (8) to the mixing facility.
- the metered and processed fibrous material (9) is conveyed on top of the aggregate (8).
- the third and preferred embodiment is shown in Figure 4 and includes a method of replenishing the hopper unit with compressed fibre bales without interrupting the delivery of metered and processed fibre into the process.
- this embodiment consists of two hoppers similar to that described in the second embodiment, arranged to form a double hopper metering system with the spiked roller drive for each hopper organised such that only one hopper/roller assembly will deliver material at any one time.
- the roller drive is automatically switched to the other hopper roller assembly only when the first hopper is almost empty.
- Elevations (1), plan (2) and rear view (3) show the fibre delivery system installed in an existing machine aggregate hopper (4). This enables a quick and effective addition of the facility to existing microasphalt road surfacing equipment.
- Reference to Figure 5 shows how the sequential switching is effected by using a detector switch (1) mounted in the wall of the fibre hopper (2) which is activated by the presence of platen (3) and so organised that only a small amount of fibre remains in the hopper once automatic changeover has occurred. This enables the empty hopper to be replenished with compacted bales of fibre ready for the next change over to occur and so on.
- Figure 6 shows a typical circuit diagram to control the automatic changeover operation.
- the independent roller hydraulic drive motors (1) and (2) are switched on and off by hydraulic change-over valve (3).
- valve activation is controlled by detector switch (4) via change over relay (5).
- a manual over-ride system is also provided by switches (7) and (8) which enable the fibre system to be run independently of other ingredients for calibration, or can be used to operate the process in event of component failure.
- An emergency stop (9) is provided in the event of the need to stop the process quickly.
Abstract
Description
Claims (16)
- Fibre delivery system comprising a hopper for accommodating a bale of fibrous material, and which is closed at its base by a plurality of rollers, each roller having on its surface a plurality of projections, and means for forcing a bale accommodated in the hopper onto the rollers.
- A system according to claim 1, wherein the projections are in the form of spikes.
- A system according to claim 1 or claim 2, wherein adjacent rollers are arranged to rotate in opposite directions to one another.
- A system according to any preceding claim, which further comprises a delivery auger spaced apart and below the rollers.
- A system according to any preceding claim, wherein the forcing means comprises a removable plate which closes the upper end of the hopper and which is movable down the hopper in a substantially horizontal plane.
- A system according to claim 5, which further comprises hydraulic means for controlling the movement of the plate.
- A system according to claim 5, which further comprises electric means for controlling the movement of the plate.
- A system according to claim 5, which further comprises variable mass means, increasing in mass down the hopper, for controlling the movement of the plate.
- A system according to any of claims 5 to 8, wherein the plate is pivoted about, or hinged at, one of its sides, so as to allow opening of the top of the hopper for loading a bale thereinto.
- A system according to any preceding claim, which comprises a plurality of hoppers and associated forcing means, and switching means responsive to the height of material in one hopper for activating the rollers, and auger when present, in another hopper.
- A mobile asphalt blending and laying machine comprising a blending unit, feeding into the blending unit a delivery system as defined in any preceding claim, and means for the laying material from the blending unit onto a substrate surface.
- A machine according to claim 11, which further comprises means for feeding aggregate into the blending unit.
- A machine according to claim 12, which further comprises a conveyor running into the blending unit, and wherein the aggregate feed means and the hopper are arranged to deliver material onto the conveyor for entry into the blending unit.
- A machine according to claim 13, wherein the hopper is located after the aggregate feeding means, so that, in use, fibrous material from the hopper is laid on top of the aggregate on the conveyor.
- A method of introducing fibrous material into asphalt, comprising loading a bale of fibrous material onto a plurality of contra-rotating rollers, each roller having a plurality of projections on its surface, thereby scraping fibres from the bale, and metering the fibres into asphalt.
- Use of a system as defined in any of claims 1 to 10, for incorporating fibrous material from bale form into an asphalt mixture for application to a substrate surface.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9621673 | 1996-10-17 | ||
GBGB9621673.4A GB9621673D0 (en) | 1996-10-17 | 1996-10-17 | Fibre delivery system for asphalt production |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0837187A2 true EP0837187A2 (en) | 1998-04-22 |
EP0837187A3 EP0837187A3 (en) | 1999-03-03 |
EP0837187B1 EP0837187B1 (en) | 2003-01-02 |
Family
ID=10801592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97402440A Expired - Lifetime EP0837187B1 (en) | 1996-10-17 | 1997-10-15 | Fibre delivery system for asphalt production |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0837187B1 (en) |
AT (1) | ATE230457T1 (en) |
DE (1) | DE69718124D1 (en) |
ES (1) | ES2186857T3 (en) |
GB (1) | GB9621673D0 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2785918A1 (en) * | 1998-11-16 | 2000-05-19 | Gregori International Sa | Machine for making measured homogeneous mixture of divided material and fibrous material |
WO2004063467A1 (en) * | 2003-01-14 | 2004-07-29 | Maclaw Limited | Track surface |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3686714A (en) * | 1969-05-07 | 1972-08-29 | Hergeth Kg Masch Apparate | Device for opening bales of textile fibers and the like |
DE2416944A1 (en) * | 1973-06-18 | 1975-01-09 | Spinnerei Karl Marx Veb | Fibre bale picking and mixing appts. - with screw feeder in discharge chamber to distribute fibres uniformly over discharge duct |
US4126913A (en) * | 1976-05-14 | 1978-11-28 | Crompton & Knowles Corporation | Opening machinery for textile fibers |
EP0344382A1 (en) * | 1988-06-02 | 1989-12-06 | Entreprise Jean Lefebvre | Cold mix bituminous composition and process for making such a composition |
WO1992001095A1 (en) * | 1990-07-05 | 1992-01-23 | Bonde Lindberg | Apparatus for treatment of fibre material |
FR2718766A1 (en) * | 1994-04-15 | 1995-10-20 | Meunier Jacques | Fabricating road-making materials |
EP0716186A1 (en) * | 1994-12-02 | 1996-06-12 | Orgel | Method for making reinforced soil with fibrous additives |
-
1996
- 1996-10-17 GB GBGB9621673.4A patent/GB9621673D0/en active Pending
-
1997
- 1997-10-15 EP EP97402440A patent/EP0837187B1/en not_active Expired - Lifetime
- 1997-10-15 ES ES97402440T patent/ES2186857T3/en not_active Expired - Lifetime
- 1997-10-15 DE DE69718124T patent/DE69718124D1/en not_active Expired - Fee Related
- 1997-10-15 AT AT97402440T patent/ATE230457T1/en not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3686714A (en) * | 1969-05-07 | 1972-08-29 | Hergeth Kg Masch Apparate | Device for opening bales of textile fibers and the like |
DE2416944A1 (en) * | 1973-06-18 | 1975-01-09 | Spinnerei Karl Marx Veb | Fibre bale picking and mixing appts. - with screw feeder in discharge chamber to distribute fibres uniformly over discharge duct |
US4126913A (en) * | 1976-05-14 | 1978-11-28 | Crompton & Knowles Corporation | Opening machinery for textile fibers |
EP0344382A1 (en) * | 1988-06-02 | 1989-12-06 | Entreprise Jean Lefebvre | Cold mix bituminous composition and process for making such a composition |
WO1992001095A1 (en) * | 1990-07-05 | 1992-01-23 | Bonde Lindberg | Apparatus for treatment of fibre material |
FR2718766A1 (en) * | 1994-04-15 | 1995-10-20 | Meunier Jacques | Fabricating road-making materials |
EP0716186A1 (en) * | 1994-12-02 | 1996-06-12 | Orgel | Method for making reinforced soil with fibrous additives |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2785918A1 (en) * | 1998-11-16 | 2000-05-19 | Gregori International Sa | Machine for making measured homogeneous mixture of divided material and fibrous material |
WO2004063467A1 (en) * | 2003-01-14 | 2004-07-29 | Maclaw Limited | Track surface |
Also Published As
Publication number | Publication date |
---|---|
DE69718124D1 (en) | 2003-02-06 |
EP0837187B1 (en) | 2003-01-02 |
GB9621673D0 (en) | 1996-12-11 |
ATE230457T1 (en) | 2003-01-15 |
EP0837187A3 (en) | 1999-03-03 |
ES2186857T3 (en) | 2003-05-16 |
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