EP3717699A1 - Centrale d'enrobage à chaud mobile et procédé de fabrication d'un enrobé mettant en oeuvre une telle centrale d'enrobage - Google Patents
Centrale d'enrobage à chaud mobile et procédé de fabrication d'un enrobé mettant en oeuvre une telle centrale d'enrobageInfo
- Publication number
- EP3717699A1 EP3717699A1 EP18811218.9A EP18811218A EP3717699A1 EP 3717699 A1 EP3717699 A1 EP 3717699A1 EP 18811218 A EP18811218 A EP 18811218A EP 3717699 A1 EP3717699 A1 EP 3717699A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tank
- end wall
- mix
- coating plant
- disposed
- 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.)
- Withdrawn
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
- E01C19/08—Apparatus for transporting and heating or melting asphalt, bitumen, tar, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F29/00—Mixers with rotating receptacles
- B01F29/60—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers
- B01F29/63—Mixers with rotating receptacles rotating about a horizontal or inclined axis, e.g. drum mixers with fixed bars, i.e. stationary, or fixed on the receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/50—Movable or transportable mixing devices or plants
- B01F33/502—Vehicle-mounted mixing devices
- B01F33/5023—Vehicle-mounted mixing devices the vehicle being a trailer which is hand moved or coupled to self-propelling vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/181—Preventing generation of dust or dirt; Sieves; Filters
- B01F35/189—Venting, degassing or ventilating of gases, fumes or toxic vapours during mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/45—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor
- B01F35/451—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor by rotating them about an axis parallel to the plane of the opening
-
- 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
- E01C19/1027—Mixing in a rotary receptacle
-
- 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
- E01C19/1027—Mixing in a rotary receptacle
- E01C19/1036—Mixing in a rotary receptacle for in-plant recycling or for reprocessing, e.g. adapted to receive and reprocess an addition of salvaged material, adapted to reheat and remix cooled-down batches
Definitions
- the present invention relates to the field of machines for the manufacture and / or renovation of roads in general. These machines are generally referred to as wrappers or coating plant. More particularly, the subject of the present invention is a mobile coating plant in order to be able to produce asphalt directly on the site of use of the latter for small areas and for road repairs, for example after work or nesting sites. hen. Furthermore, the present invention also relates to a manufacturing method implementing such a coating plant.
- the mix may be cooled during transport between the coating plant where it is produced and the place of use and especially when it comes to small quantities that are usually spread in the bucket of the truck.
- the cooling the asphalt causes a more difficult application thereof and also adversely affects its resistance over time because the asphalt can be applied at a temperature too low compared to the recommendations which can limit its behavior over time.
- this recycling machine In order to allow the evacuation of fumes and vapors, this recycling machine has vents that are arranged at one end. However, such air vents are effective for asphalt leakage when planed plates of large size. However, when it comes to fairly fine particles, such as gravel or sand, such a machine has fairly large leakage due to the presence of these vents. Thus, such recycling machines are not compatible with the production of new asphalt at the site of use of the latter, because the components of the mix include small diameter materials and especially sand and gravel, and a such a machine would leak material too important to be used for the production of new asphalt.
- the object of the present invention is to at least partially overcome the defects of the prior art set out above, in particular by proposing a mobile hot-mix plant that can be used at the place of application of the asphalt mix making it possible to manufacture good quality asphalt on the application site of the latter.
- Another objective of the present invention is to propose a process for manufacturing a bituminous mix at the site of use using such a coating plant.
- the present invention relates to a mobile hot-mix plant comprising a rotationally symmetrical vessel, said vessel being able to rotate about itself about its axis. of revolution and being closed by a first end wall and a second end wall opposite the first end wall, the first end wall having a plurality of air vents disposed about the revolution of the tank, said air vents each having an opening, the first end wall having a plurality of deflectors, each deflector being associated with a ventilation opening and is disposed on the inner surface of the first partition of end upstream of the opening of the associated ventilation opening in the direction of rotation of the tank, said deflectors pre sensing a height extending parallel to the axis of revolution towards the inside of the tank, and the first end wall being retractable so as to allow at least the unloading of the tank.
- baffles arranged at the inner surface of the first end wall makes it possible to compact and / or push back the coating present inside the tank below the openings of the ventilation openings during the rotation of the this tank. Indeed, the height of these deflectors prevents the entry of materials constituting the asphalt in the openings of the ventilation openings by tamping them or by pushing them towards the inside of the tank. Thus, leakage of asphalt through the openings of the vents is prevented regardless of the size of the elements present inside the tank to form the asphalt.
- the coating plant according to the invention may further comprise one or more of the following characteristics taken alone or in combination.
- the baffles have a shape of a circular arc, in particular half-circular.
- the center of the half-circular shape of the deflector coincides with the center of the opening of the ventilation opening.
- the deflector has first and second lateral ends, the first lateral end being disposed closest to the axis of revolution and the second lateral end being disposed farthest from the axis of revolution, the height of the deflector decreasing between the first and the second lateral ends.
- the ventilation openings each have a cover wall disposed on the outer surface of the first end wall of the tank and covering the openings of said vents, said cover wall forming an angle with the surface external of the first end wall towards the outside of the tank, thereby defining a channel whose output defines a discharge slot.
- the discharge slot forms a plane disposed substantially perpendicular to the first end wall.
- the discharge slot has a substantially trapezoidal shape.
- the evacuation slot has a substantially semicircular shape.
- the cover wall has an angle with the outer surface of the first end wall between 5 ° and 35 °, preferably between 10 ° and 20 °.
- the channel has an inlet disposed closer to the periphery of the first end wall than the outlet of the channel, said channel forming an angle with a radial direction relative to the axis of revolution.
- the channel forms an angle of between 15 ° and 35 °, preferably an angle of between 20 ° and 30 °, in particular 25 °, with the radial direction of the axis of revolution.
- the opening of the ventilation opening may have a substantially trapezoidal shape whose bases define the inlet and the outlet of the channel, the largest base of the opening being disposed at the level of the ventilation slot so that that the channel forms a funnel towards the interior of the tank.
- the ventilation openings are arranged in a circle concentric with the axis of revolution of the tank.
- the circle passes through the center of the openings of the ventilation openings.
- the circle has a radius of between 30% and 70% of the radius of the first end wall.
- the inlet of the channel is disposed at a distance of between 35% and 75% of the axis of revolution.
- the cover wall has a width of between 10% and 20% of the radius of the first end wall.
- the baffles are disposed on the inner surface of the first end wall so that the circle passes through the middle of said baffles.
- the tank is rotated by a motor.
- At least the first end wall has a convex shape.
- the cover wall forming the channel is arranged tangentially to the first end wall of the vessel.
- the coating plant comprises a burner disposed inside the tank at the center of the second end wall, the burner having a conically shaped protective envelope whose axis is oriented parallel to the axis of revolution of the tank and whose end of larger diameter is in contact with the second end wall.
- the lower diameter end has a grid.
- the burner is a fuel burner.
- the burner can be controlled by a timer.
- the burner has an independent ventilation.
- the tank has at least two curved blades arranged in a fixed manner on the inner periphery of the tank, said curved blades having a first end disposed closest to the first end wall and a second end disposed in contact with the second wall. end, said first end first coming into contact with the materials constituting the asphalt during the rotation of the vessel and said curved blades being configured to allow mixing of the asphalt.
- the curved blades are sharp so as to be able to slice packaging in which the various materials constituting the asphalt are contained.
- the first end wall is connected to a first end of a structure supporting the tank by a bearing projecting from this first end, said bearing being configured to support the first end wall when in a retracted position and to allow rotation of the first end wall when in a closed position.
- the first end wall can be connected to the rest of the tank by a lever system in pivot connection.
- the tank has a sloped anti-flow sheet disposed in such a way that the first end wall comes into contact with this sloped anti-flow sheet when it occupies a closed position, said plate anti-flow-by-slope being configured to retain the various materials constituting the mix inside the tank during its loading by the first end wall when it is in its retracted position.
- the tank has a clogged opening configured to allow the loading of this tank by gravity.
- the clogged opening is configured to cooperate with a removable loading hopper.
- the clogged opening is disposed near the first end wall of the vessel.
- the clogged opening is disposed in the center of the tank.
- the coating plant has a structure having a first end connected to the first end wall, said first end comprising a retraction system having a nitrogen sphere configured to cause closure overpressure at the end. of said first end wall when said first end wall is in a closed position.
- the coating plant may further comprise a weighing axle so as to allow the weighing of the various materials constituting the asphalt as they are introduced into the tank.
- the axle scale is connected to a central console having a digital display configured to display the loading weight of the tank.
- the axle scale is electrically powered by the motor driving the rotating tank.
- the axle scale is electrically powered by a battery.
- the coating plant may further comprise a temperature probe disposed within the vessel, said temperature sensor being configured to measure the temperature within the vessel.
- the temperature sensor is connected to the central console so as to allow a display of the temperature inside the tank on the digital display in order to control the heating and mixing temperature of the materials constituting the mix.
- the steering console has an activation lever for rotating or heating the tank.
- the coating plant may further comprise a hydraulic cylinder connecting a second end of a structure housing the tank to a trailer frame, said hydraulic cylinder being configured to allow the tilting of the tank to facilitate its unloading.
- the structure may have an observation window arranged so as to be able to visualize the position of the tank before the retraction of the first end wall.
- the observation window is made of a transparent material resistant to temperatures of between 120 ° C. and 200 ° C., preferably between 150 ° C. and 180 ° C.
- the structure may have crutches arranged at the first end wall of the tank to increase the stability of the coating plant during its operation.
- the structure may have a plurality of control levers, said control levers being configured in particular to control the retraction or closing of the first end wall of the tank, the deployment of the legs, or the actuation of the hydraulic cylinder to allow the tilting of the tank.
- the subject of the present invention is also a method for manufacturing a bituminous mix implementing a coating plant as defined above, the method implementing at least one of the following steps:
- the constituent materials of the mix loaded in the tank during the loading step include sand, gravel, bitumen and optionally pigments when the coated product is a new asphalt or comprise planed asphalt crusts, a soft binder and optionally pigments when the coated product is a recycled mix.
- the binder comprises the pigments.
- the soft binder used has a density at 15 ° C of between 940 and 1010 kg / m 3 , a kinematic viscosity at 100 ° C of between 50 and 85 mm 2 / s, a higher flash point. or equal to 230 ° C, a minimum pumpability temperature of 50 ° C, and a heating mass loss of less than or equal to 2%.
- the manufacturing process allows for asphalt production of about 2 tons / hour.
- the manufacturing process can be implemented at the site of use of the asphalt mix.
- FIG. 1 is a schematic representation in perspective of a mobile coating plant
- FIG. 2 is a schematic perspective representation of the coating plant of FIG. 1 having a retracted end wall
- FIG. 3 is a diagrammatic representation in perspective of a coating plant presenting in more detail an end wall presenting vents
- FIG. 4 is a diagrammatic representation in perspective of the internal surface of an end wall of a tank of the coating plant
- FIG. 5 is a diagrammatic representation in perspective of the outer surface of the end wall of FIG. 4
- FIG. 6 is a diagrammatic representation in perspective of a ventilation opening and a deflector
- FIG. 7 is a schematic representation in perspective of the interior of a tank of the coating plant of FIGS. 1 and 2 presenting a burner
- FIG. 8A is a schematic representation in perspective of a coating plant being loaded according to a particular embodiment
- FIG. 8B is a schematic perspective representation of a coating plant being loaded according to another particular embodiment.
- FIG. 9 is a schematic representation of a flowchart illustrating a process for manufacturing a mix.
- first and second ends of the structure at first and second end walls of the vessel, at a first to a second hydraulic cylinder, at a first and a second a second end of the deflector, at a first and second ends of the curved blades, at a first and a second height for the ends of the baffle, at a first and a second width for the cover wall, at a first and a second at a second width of the opening of the ventilation openings, and at a first and a second length for the opening of the ventilation openings. It is a simple indexing to differentiate and name close but not identical elements.
- a mobile hot-mix asphalt plant 1 comprising a trailer frame 3 so as to be able to be moved to a site where the mix is used, for example on a road where it is necessary to carry out filling operations of potholes, also called patches, or a portion of the sidewalk after intervention for example on a buried network of electricity, gas or electricity, for example, or at an individual home to make a tarmac driveway.
- the trailer frame 3 has a structure 31 in which is installed a rotationally symmetrical tank 5 for producing the mix. Furthermore, in order to allow the heating of the various constitutive elements of the mix 15 (visible in FIG. 8A) and to keep the mix in a malleable state, the tank 5 has a burner 11 (visible in FIG. 7). In order to be able to move the coating plant 1, the trailer frame has wheels 33 and a coupling hook 35 intended to be connected to a vehicle in order to allow the traction of this coating plant 1.
- the structure 31 presents a first end 31a and a second end 31b opposite the first end 31a. According to the particular embodiment of FIG. 1, the first end 31a of the structure 31 optionally has a cover 32 covering the tank 5.
- the trailer frame 3 has two axles. However, according to other embodiments, the trailer frame 3 may have a different number of axles depending on the total weight of the load of the coating plant 1.
- the tank 5 is able to rotate about itself around its axis of revolution A (visible in FIG. 3) in order to allow mixing of the mix, in particular to allow a good homogeneity of this one and to prevent it from solidifying. Furthermore, the tank 5 is closed by a first end wall 5a and a second end wall 5b (visible in Figures 7 and 8B) opposite the first end wall 5a.
- the first end wall 5a is disposed at the first end 31a of the structure and the second end wall 5b is disposed at the second end 31b of the structure 31.
- the tank 5 may have a cylindrical shape. However, according to other embodiments not shown here.
- the tank 5 is rotated by a motor.
- the motor may be arranged inside the structure 31, for example in a housing disposed at the second end 31b, or outside the structure 31.
- at least the first partition of the structure 31 end 5a has a convex shape.
- the direction of rotation R of the tank 5 is fixed and predetermined. This direction of rotation R may for example correspond to the clockwise or counterclockwise direction (as shown with reference to Figure 4 for example).
- the first end wall 5a is retractable so as to ensure the unloading of the tank 5 to extract the asphalt.
- the first end wall 5a can be connected to the rest of the tank 5 by a pivotally connected lever system 59 to allow this first end wall 5a to be retractable.
- the structure 31 has a first hydraulic jack 40 connected to a pivoting arm 41 (better visible in Figure 3) connected to the first end 31a.
- the first hydraulic cylinder 40 is configured to allow pivoting of the first end 31a of the structure 31 to bring the first end wall 5a in the retracted position by compression thereof.
- first end wall 5a is connected to a first end 31a of the structure 31 by a bearing 57 projecting from this first end 31a.
- the bearing 57 is configured to support the first end wall 5a when in a retracted position and to allow rotation of the first end wall 5a when in a closed position.
- the structure 31, and in particular the first end 31a comprises a retraction system having a nitrogen sphere configured to cause a closing overpressure at said first end wall 5a when the first end wall 5a is in a closed position to ensure the sealing of the tank 5 at the joints between the first end wall 5a and the rest of the tank 5.
- the first end wall 5a has a plurality of ventilation openings 7 arranged around the axis of revolution A of the tank 5.
- the ventilation openings 7 each having an opening O (FIG. visible in particular in Figure 4).
- the vents 7 allow the evacuation of vapors and fumes generated during the manufacture of the mix.
- the heating of the various constitutive materials of the mix 15 (visible in Figure 8A) causes the formation of vapors and fumes, including water vapor and burner fumes, that it is necessary to evacuate to ensure the operation of the coating plant 1.
- the shape and arrangement of these vents 7 is developed in more detail later.
- the first end wall 5a has a plurality of baffles 9 disposed on the inner surface 51 of this first end wall 5a. More specifically, each deflector 9 is associated with a ventilation opening 7 upstream of the opening O of the ventilation aperture 7 associated in the direction of rotation R of the vessel 5.
- the deflectors 9 have a height H parallel to the axis of revolution A of the tank 5.
- the presence of these baffles 9 prevents the mixture, including sand and gravel, rushes into the opening O during the rotation of the tank 5 , thus preventing leakage of these elements through the openings O vents 7.
- the baffles will deflect the elements arranged in the tank 5 to prevent them from rushing in the openings O. Thus, these elements, whatever their size, are less likely to escape from the tank 5 through the openings O air vents 7.
- the baffles 9 have a circular arc shape, including semi-circular. More particularly, the center of the semicircular shape of the deflector 9 coincides with the center of the opening O of the ventilation opening 7. Such an arrangement of the deflector 9 in the form of a circular arc allows an optimal action to prevent leakage via the openings O of the ventilation openings 7.
- the deflector 9 has a first 91 and a second 93 lateral ends.
- the first lateral end 91 is disposed closest to the axis of revolution A and the second lateral end 93 is disposed farthest from the axis of revolution A of the tank 5.
- the height H (visible on the 6) of the deflector 9 decreases between the first 91 and the second 93 lateral ends.
- the vents 7 each have a cover wall 71 disposed on the outer surface 53 of the first end wall 5a of the tank 5.
- the covering walls 71 cover the openings O of the
- the cover wall 71 forms an angle ⁇ with the outer surface 53 of the first end wall 5a towards the outside of the tank 5, defining and a channel 73 (better visible in Figure 6), the outlet 73b defines a discharge slot 75.
- the angle formed by the covering wall 71 with the outer surface 53 of the first end wall 5a is between 5 ° and 35 °, and preferably between 10 ° and 35 °. ° and 20 °.
- the covering wall 71 forming the channel 73 is arranged tangentially to the first end wall 5a of the tank 5. Such inclination of the covering wall 71 contributes to the prevention of leakage of the constituent materials of the coated by the ventilation openings 7 because the slope defined by the covering wall 71 is sufficient to maintain the materials constituting the mix 15 and the coated inside the tank 5 even though the hearing aeration 7 is arranged in a lower part of the tank 5, ie close to the trailer frame 3.
- the channel 73 has an inlet 73a disposed closer to the periphery of the first end wall 5a than the outlet 73b of the channel 73.
- the channel 73 forms an angle b (visible in FIG. 4 ) with a direction radial with respect to the axis of revolution A. More particularly, according to the embodiment of FIG. 5, the channel 73 forms an angle b of between 15 ° and 35 °, preferably an angle of between 20 ° and 35 °. ° and 30 °, especially 25 °, with the radial direction relative to the axis of revolution A, that is to say with the radius P of the first end wall 5a.
- Such an inclination of the channel 73 in addition to the slope defined by the covering wall 71 makes it possible to prevent leakage of materials constituting the coating 15 by the ventilation openings 7.
- the discharge slot 75 forms a plane disposed substantially perpendicular to the first end wall 5a.
- the discharge slot 75 has a substantially trapezoidal shape.
- the use of a substantially trapezoidal shape for the discharge slot 75 makes it possible to provide a large evacuation surface for vapors and fumes.
- the discharge slot 75 may have a substantially semi-circular shape.
- the presence of the deflectors 9 on the inner surface 51 of the first end wall 5a combined with the presence of the covering wall 71 forming the channel 73 makes it possible to effectively prevent leakage of materials constituting
- the baffles 9 compact and push back these materials, and the shape and the inclination of the channel 73 makes it possible to redirect the materials which could have rushed into the opening O of the ventilation opening 7 towards the inside of the tank 5.
- the opening O of the ventilation opening 7 has a substantially trapezoidal shape whose bases define the inlet 73a and the outlet 73b of the channel 73.
- the largest base of the opening O is disposed at the level of the ventilation slot 75 so that the channel 73 forms a funnel towards the interior of the tank 5.
- Such an arrangement of the funnel-shaped channel 73 in the direction of the The interior of the tank 5 also makes it possible to prevent leakage of materials constituting the mix 15 of the coating plant 1.
- the opening O has a first length G1 disposed furthest away from the deflector 9 and a second length G2 disposed closest to the deflector 9. According to this particular embodiment, the first length G1 is greater than the second length G2.
- the first length G1 corresponds to the largest base of the opening O and the second length G2 corresponds to the shortest base of the opening O.
- the first length G1 measures 10, 5 cm and the second length G2 measures 9 cm.
- the opening O has a first width F 1 arranged furthest from the deflector 9 and a second width F 2 disposed closest to the baffle 9.
- the first width F 1 is greater than the second width F 2 .
- the first width Fl is 12 cm and the second width F2 is 10 cm.
- the covering wall 71 also has a first width B1 disposed farthest from the deflector 9 and a second width B2 disposed closest to the deflector 9.
- the first width B1 is greater than the second width B2. More particularly, the first width B1 is 11.5 cm and the second width B2 is 10 cm.
- the first lateral end 91 of the deflector 9 has a first height H1 and the second lateral end 93 of the deflector 9 has a second height H2.
- the first height H1 is greater than the second height H2.
- the first height H1 measures 8.5 cm and the second height H2 measures 6 cm.
- the vents 7 are arranged in a circle C (visible in Figure 4) concentric to the axis of revolution of the vessel 5. More particularly, the circle C passes through the center of openings O of ventilation openings 7.
- the circle C has a radius r between 30% and 70% of the radius P of the first end wall 5a.
- a radius r for ventilation openings 7 allows a good evacuation of vapors and fumes generated during the hot preparation of the mix. The fumes and vapors generated will tend to move towards the upper part of the tank 5 and to ensure their proper evacuation, the vents 7 must be positioned sufficiently far from the axis of revolution A to play their evacuation role optimally. In addition, because of the rotational displacement of the tank 5, these vents 7 should not be too close to the periphery of the first end wall 5a to optimize their role of evacuation as well.
- the inlet 73a of the channel 73 is disposed at a distance E between 35% and 75% of the axis of revolution A.
- the covering wall 71 has a width B between 10% and 20% of the radius P of the first end wall 5a.
- the width B of this covering wall 71 substantially corresponds to the width of the opening O of the ventilation opening 7, as shown in these figures.
- the dimensions of the opening O of the ventilation opening 7 are important to ensure good evacuation of the vapors and fumes generated during the preparation of the mix. Indeed, if these O openings are too small, evacuation, including vapors, may be insufficient and the mix can be loaded with moisture, which can affect its behavior over time.
- the baffles 9 are disposed on the inner surface 51 of the first end wall 5a so that the circle C passes through the middle of the said baffles 9.
- Such positioning of the baffles enables a good packing of the asphalt at the openings O of the ventilation openings 7 during the rotation of the tank 5 and thus helps prevent leakage of constituent materials of the coating 15 of the latter.
- the burner 11 is disposed within the vessel 5 at the center of the second end wall 5b. More particularly, the burner 11 has a protective envelope 111 of conical shape whose axis extends parallel to the axis of revolution A of the tank 5 and whose end of larger diameter 111a is in contact with the second end wall 5b.
- the end of the lower diameter 111b of the protective casing 111 of the burner 11 has a grid 113.
- the presence of this protective casing 111 prevents adhesion of the mix on this burner 11 which could lead to pyrolysis phenomena that can cause a fire starting inside the tank 5.
- the presence of the grid 113 prevents any entry of asphalt or material constituting the asphalt mix 15 the interior of the burner 11 which could adversely affect the proper functioning of the latter or the integrity of the coating plant 1.
- a corkscrew serpentine structure can be arranged inside the protective envelope 111 in order to push the merchandise away from the flame and thus to prevent fouling of the hearth by materials contained inside the tank 5.
- the burner 11 is a fuel burner.
- the burner 11 may be controlled by a timer (not shown).
- the quality of the mix is generally related to the preparation temperature and the heating time of the various constituents of this mix.
- the burner 11 has an independent ventilation (not shown).
- This autonomous ventilation makes it possible to cool the burner 11 even when the motor driving this burner 11 is stopped.
- the autonomous ventilation is controlled by a temperature sensor (not shown) placed in the burner 11. If the temperature of the temperature sensor exceeds a set value (of the order of 70 ° C for example), then the independent ventilation it starts to cool the zone and in particular the burner 11.
- this ventilation allows among other things to increase the life of this burner 11 by preventing possible heat influx from the tank 5 which could damage the burner 11, and therefore of the coating plant 1 and facilitates the use of this coating plant 1.
- the tank 5 has at least two curved blades 13 arranged in a fixed manner on the inner periphery 55 of the tank 5.
- the curved blades 13 are arranged on either side of a diameter of the tank 5.
- the curved blades 13 have a first end 13a disposed closest to the first end wall 5a and a second end 13b disposed in contact with the second end wall 5b.
- the curved blades 13 are arranged so that their first end 13a first comes into contact with the materials constituting the mix 15 during the rotation of the tank 5.
- the curved blades 13 are configured to allow the mixing of the mix.
- the curvature of the curved blades 13 makes it possible to bring back the constituent materials of the mix 15 towards the second end wall 5b so as to bring the latter closer to the burner 11 so as to ensure a good homogeneity of the heating of these materials.
- the conical shape of the protective casing 111 of the burner 11 also contributes to the displacement of the materials constituting the coating 15 inside the tank 5 during the rotation thereof by facilitating in particular their evacuation towards the center of the tank 5, thus also contributing to a good homogeneity of their heating.
- the inner periphery 55 of the tank 5 also has straight bars 14 extending parallel to the axis of revolution A of the tank 5. These straight bars 14 also contribute to the mixing of the materials constituting the mix 15. According to the particular embodiment of FIG. 7, the inner periphery 55 of the tank 5 has two straight bars 14 arranged on either side of the diameter of the tank 5.
- the curved blades 13 are sharp so as to be able to slice packaging in which the various materials constituting the mix 15 are contained.
- the tank 5 during its loading with the constituent materials of the mix 15 according to a first particular embodiment.
- the tank 5 is loaded by the first end wall 5a when the latter is in the retracted position.
- the tank is filled with gravel and sand in bulk and with bitumen cartridges packed in hot melt bags and serving as a binder for the asphalt and optionally pigments to give a color to asphalt.
- the coated product is a new mix.
- the pigments may be contained in the bitumen.
- the tank 5 has a sloped anti-flow plate 60 (also visible in FIG.
- the various materials constituting the mix 15 may all be in packages that will be sliced by the curved blades 13 during the rotation of the vessel 5. According to this first particular embodiment , the loading of the tank 5 is easy to implement and it is possible to load the tank 5 on the site of use of the latter.
- the mix produced in this coating plant 1 may be a recycled mix.
- the tank 5 is loaded with previously planed asphalt crusts, a soft binder can be packed in hot melt bags and optionally pigments.
- a soft binder For the recycling of asphalt mix, it is preferable to add a soft binder because the planed asphalt, and in particular the bitumen which composes it, has undergone an aging related to its use.
- the planed mix is generally hard and fragile because of the oxidation it undergoes during its use and breaks because its asphaltene content and its viscosity have increased over time.
- a soft binder is added to the tank 5 to reduce the asphaltene content and viscosity of the mix to obtain a recycled mix more manageable and more durable over time.
- the soft binder has a specific composition rich in resin and aromatic fractions and almost free of asphaltene. It is thus possible to restore the composition and the initial properties of the bitumen contained in the planed scabs, to correct the effects of the oxidation of the bitumen contained in these planed scabs, and to have a better resistance to aging.
- the soft binder used has a density at 15 ° C of between 940 and 1010 kg / m 3 , a kinematic viscosity at 100 ° C of between 50 and 85 mm 2 / s, a flash point greater than or equal to 230 ° C, a minimum pumpability temperature of 50 ° C, and a heating mass loss of less than or equal to 2%.
- a soft binder having these characteristics makes it possible to obtain a recycled mix having a needle penetration at 25 ° C. of between 25 and 35 tenths of a millimeter (dmm), which corresponds to a bitumen that meets the requirements. for a road bitumen.
- pigments may be contained in this soft binder so that the recycled bitumen has a particular color.
- An example of a binder having these properties and pigments is binder Color 50 ®.
- the tank 5 during its loading with the constituent materials of the mix 15 according to a second particular embodiment.
- the tank 5 has an obstructable opening (not shown) configured to allow the loading of this tank 5 by gravity.
- the clogged opening is configured to cooperate with a removable loading hopper 17.
- the various materials constituting the mix 15 are poured into the hopper 17 before being transferred to the tank 5.
- the use of such a loading system relieves the operators because it is carried out without requiring Manual intervention apart from the positioning and fixing of the loading hopper 17.
- the use of this loading hopper 17 accelerates the loading speed of the tank 5.
- the clogged opening is disposed near the first end wall 5a of the tank 5.
- the clogged opening is dislocated. placed in the center of the tank 5.
- the coating plant 1 may further comprise an axle weighing scale in order to allow the weighing of the different materials constituting the mix 15 as they are introduced into the tank 5.
- the axle scale is connected to a central console 19.
- the central console 19 has a digital display 191 configured to display the loading weight of the tank 5 thus allowing the weighing of different materials constituting during the introduction into the tank 5.
- the various materials constituting the mix 15 are introduced in the right proportions so as to ensure the production of a good quality asphalt.
- the axle scale is electrically powered by a battery disposed inside the structure 31.
- the coating plant 1 may further comprise a temperature probe (not shown) disposed inside the tank 5.
- the temperature sensor is configured to measure the temperature inside the tank 5 so that to be able to control the preparation temperature of the mix.
- the temperature sensor may optionally be connected to a device (not shown) connected to the burner 11 and driving the latter to reduce its heating intensity when the preparation temperature of the mix measured by the temperature probe exceeds a preset value.
- the temperature probe can be connected to the central console 19 so as to allow a display of the temperature inside the tank 5 on the digital display 191 in order to control the heating and mixing temperature.
- the temperature probe may be connected to an audible alarm, for example included in the central console 19 in order to trigger an audible signal in the case where the temperature inside of the tank 5 exceeds a threshold value.
- control console 19 has an activation lever 193 for rotating or heating the tank 5.
- This activation lever 193 allows the operator to easily trigger or stop the rotation of the tank 5 or the operation of the burner 11.
- control console 19 may further have an emergency stop button 195 arranged according to this particular embodiment near the activation lever 193.
- the structure 31 may have crutches 37 arranged at the level of the first end wall 5a of the tank 5 in order to increase the stability of the coating plant 1 during of its operation.
- crutches 37 limits the movements of the trailer frame 3 during rotation of the tank 5 during the preparation of the mix.
- the presence of these stands 37 makes it possible to adjust the level of the tank 5, for example by means of a spirit level disposed on the structure 31, so that the first end wall 5a and the second end wall 5b are arranged at the same height.
- This leveling of the tank 5 allows, among other things, a granular homogenization inside the whole of the tank 5, preventing a sieving effect that could occur due to the inclination of the tank 5.
- this leveling of the tank 5 also contributes to the thermal homogeneity inside the tank 5.
- the structure 31 may have an observation window 39 arranged to be able to visualize the position of the tank 5 before the retraction of the first end wall 5a.
- it may have a visible mark from the observation window 39 indicating the position of this tank 5. This indication may be useful when the tank 5 has the anti-flow wall by sloping 60 in order to position the tank 5 before the opening of the first end wall 5a so that the sloped anti-flow wall 60 does not interfere with the evacuation of the prepared mix.
- the observation window 39 is made of a transparent material resistant to temperatures between 120 ° C and 200 ° C, preferably between 150 ° C and 180 ° C.
- the coating plant 1 may further have a second hydraulic cylinder (not shown) connecting the tank 5 and the structure 31.
- the second hydraulic cylinder connects the second end 31b of the structure 31 housing the tank 5 to the frame of Trailer 3.
- This second hydraulic cylinder is configured to allow the tilting of the tank 5 to facilitate unloading.
- the axis of revolution A is disposed substantially parallel to the ground and the possibility of tilting the tank 5, so that the second end wall 5b is disposed higher than the first end wall 5a allows facilitate unloading, especially when there is only little bitumen remaining inside the tank 5.
- the structure 31 may have a plurality of control levers 21.
- the control levers 21 are configured in particular to control the retraction or closure of the first end wall 5a of the tank 5, the deployment of the legs 37, or else the actuation of the second hydraulic cylinder to allow the tilting of the tank 5.
- the control levers 21 and the central console 19 separated from one another.
- the control levers 21 can be disposed on the central console 19.
- the coating plant 1 can be remotely controlled by a computer for example.
- FIG. 9 there is shown a flowchart illustrating a method of manufacturing a mix implementing a coating plant 1 as defined above.
- the method of manufacturing the mix comprises a step of loading El of the tank 5 in which the tank 5 of the coating plant 1 is loaded with the various materials constituting the mix 15.
- This loading step El can be performed either with a loading hopper 17 or by the first end wall 5a when it is in its retracted position as described above with reference to Figures 8A and 8B.
- the various materials constituting the mix 15 can be loaded both in bulk and packed in containers. allowing their delivery.
- the coating plant 1 has a weighing axle to allow the measurement of the amount of each material loaded in the tank 5.
- the structure 31 has the central console 19 comprising the display 191 for displaying the loading weight of the tank 5.
- the method then implements an E2 deployment step of the legs 37 of the structure 31 to ensure the stability of the trailer frame 3 in particular during the subsequent manufacturing process of the mix.
- this deployment step E2 of the legs 37 is carried out by the actuation of one of the control levers 21 arranged at the level of the structure 31.
- This step of deploying E2 of the crutches 37 is performed after the loading step E1 in order to allow the axle scale to measure the loading mass of the coating plant 1 as the different materials constituting the coating 15 are introduced into the tank 5.
- the method then implements a step of rotating E3 of the tank 5 so as to at least mix the different materials constituting the mix 15 with the curved blades 13 and side bars 14 arranged at the inside the tank and possibly to allow the opening of the containers of the materials constituting the mix when they are not introduced in bulk in the tank 5.
- This step of rotating E3 of the tank 5 is controlled by the 'activating the activation joystick 193 of the central console 19.
- This step of rotating E3 of the tank 5 can be implemented for a period of between 1 minute and 5 minutes depending on the amount of material constituting the mix 15 loaded in the tank before 5 the triggering of the heating.
- the method then implements a heating step E4 during which the burner 11 is activated and supplied with fuel so as to allow the heating of the materials constituting the mix 15.
- This heating step E4 can for example be driven by the timer.
- this heating step E4 is carried out for a period generally of between 20 and 40 minutes depending on the amount of materials constituting the mix 15 introduced into the tank 5.
- the rotation of the tank 5 during this heating step E4 is maintained in order in particular to ensure a good homogeneity of the heating of the different materials thanks to the presence of the curved blades 13 which go as the rotation of the tank 5 bring back the constituent materials of the coated end 15 disposed near the first end wall 5a to the second end wall 5b having the burner 11 as previously described.
- this heating step E4 can also be controlled by the temperature probe disposed inside the tank 5 so that the temperature inside the tank 5 does not exceed a value. threshold so that the resulting mix has the desired technical characteristics.
- the method implements a step of stopping the heater E5.
- This step of stopping the heater E5 can be controlled by the coating plant 1, in particular thanks to the timer which can be configured to cut off the burner supply 11 after the programmed duration has elapsed or manually by an operator.
- the timer can be configured to emit a signal, for example sound or light when the heating time has elapsed.
- the method then implements an opening step E6 of the first end wall 5a in order to allow at least partial evacuation of the bitumen thus obtained.
- this opening step E6 the first end wall 5a can be partially retracted in order to be able to control the quantity of asphalt extracted from the tank 5.
- this opening step E6 can be controlled at the same time. using one of the control levers 21 for retracting the first end wall 5a.
- the method can also implement an activation step E7 of the second hydraulic cylinder connected to the second end 31b of the structure 31 so as to allow the tilting of the vessel 5 and facilitate its unloading, especially when no longer remains a lot of asphalt inside.
- This activation step E7 may for example be implemented using one of the control levers 21 configured to allow the actuation of the second hydraulic cylinder.
- the steps of rotation E3 and heating E4 can be combined, that is to say that the steps of triggering the rotation and heating of the tank 5 may form only one step.
- the deployment step E2 crutches 37 may be optional.
- the steps other than the loading step El of the tank 5 can be controlled remotely, such as for example by a computer, a hardened tablet, or by a wired case, using 'an application of assistance to the production.
- the constituent materials of the mix 15 loaded into the tank 5 during the loading step E1 include gravel, sand, bitumen as a binder and optionally pigments in the case where the mix is intended to have a color for example green or red, or additives to give the asphalt special properties.
- the pigments can be integrated into the bitumen.
- some components of this mix, such as bitumen can be introduced into the tank 5 in their packaging, ideally made of a hot melt material.
- hot melt packaging makes it possible, among other things, to reduce the waste associated with the manufacture of asphalt mix because these packagings will be found in the composition of the asphalt mix at the end of the process.
- the various materials constituting the asphalt 15 in the case of a new mix can be packaged in packages.
- gravel and sand can be packaged in 15kg bags and bitumen packaged in the form of 5kg loaves or cartridges to facilitate control of proportions of each element introduced into the tank 5 and also the transport of the latter at the manufacturing site of the mix.
- the method described above may allow the manufacture of a recycled mix.
- the constituent materials of the mix include planed asphalt crusts, a soft binder and optionally pigments to give a color to the recycled mix.
- the pigments can be present directly in the soft binder used.
- bitumen as a binder in planed asphalt crusts has been aged due to its use and its properties have been altered, which can adversely affect the quality of the recycled mix and its suitability. the weather.
- planed asphalt crusts have an asphalt content of 5% by weight. In order to achieve a surface area of 10 m 2 of recycled asphalt, approximately 1000 kg of planed asphalt crusts are required. These asphalt crusts contain about 50 kg of bitumen.
- the coating plant 1 being mobile, the manufacturing process can be implemented at the site of use of the asphalt, such as in a particular for the realization of a paved driveway. Moreover, the manufacturing process allows asphalt production of about 2 tons / hour maximum. Thus, this process makes it possible to respond to asphalt production in small quantities, in particular to enable repair work to be carried out, for example filling potholes.
- such a coating plant 1 can be moved filled in constituent materials asphalt 15 or hot mixes between different sites on which asphalt is required, which allows among other savings in time and raw material, especially when the sites are not far from each other. Indeed, the asphalt thus prepared can be moved directly into the coating plant 1 to another site of use and can still be malleable on this other site of use.
- the trailer frame 3 has a double axle.
- the payload of the coating plant 1 is 1300 kg.
- This coating plant 1 can be moved loaded notably thanks to the presence of this double axle and also thanks to a specific drawbar disposed at the hook 35.
Landscapes
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Road Paving Machines (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Fertilizers (AREA)
- Paints Or Removers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1761312A FR3074197B1 (fr) | 2017-11-28 | 2017-11-28 | Centrale d'enrobage a chaud mobile et procede de fabrication d'un enrobe mettant en oeuvre une telle centrale d'enrobage |
PCT/EP2018/082691 WO2019105927A1 (fr) | 2017-11-28 | 2018-11-27 | Centrale d'enrobage à chaud mobile et procédé de fabrication d'un enrobé mettant en œuvre une telle centrale d'enrobage |
Publications (1)
Publication Number | Publication Date |
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EP3717699A1 true EP3717699A1 (fr) | 2020-10-07 |
Family
ID=61224060
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP18811218.9A Withdrawn EP3717699A1 (fr) | 2017-11-28 | 2018-11-27 | Centrale d'enrobage à chaud mobile et procédé de fabrication d'un enrobé mettant en oeuvre une telle centrale d'enrobage |
Country Status (3)
Country | Link |
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EP (1) | EP3717699A1 (fr) |
FR (1) | FR3074197B1 (fr) |
WO (1) | WO2019105927A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN115318544B (zh) * | 2022-09-20 | 2023-12-26 | 安徽中邦特种电缆科技有限公司 | 一种海底电缆防腐沥青涂覆方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5829364B2 (ja) * | 1978-09-04 | 1983-06-22 | 道夫 神野 | アスフアルト再生装置 |
DE8530947U1 (de) * | 1985-10-31 | 1986-03-06 | Deutsche Asphalt Gmbh, 6000 Frankfurt | Vorrichtung zur Einleitung gasförmiger Medien in brennerbeheizte Trockentrommeln bzw. Trommelmischer von Asphaltaufbereitungsanlagen |
CN202898947U (zh) * | 2012-10-28 | 2013-04-24 | 西安达刚路面机械股份有限公司 | 滚筒式导入循环加热系统 |
CN105755931B (zh) * | 2016-04-29 | 2018-02-16 | 中山市易路美道路养护科技有限公司 | 一种热再生设备 |
-
2017
- 2017-11-28 FR FR1761312A patent/FR3074197B1/fr not_active Expired - Fee Related
-
2018
- 2018-11-27 WO PCT/EP2018/082691 patent/WO2019105927A1/fr unknown
- 2018-11-27 EP EP18811218.9A patent/EP3717699A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
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WO2019105927A1 (fr) | 2019-06-06 |
FR3074197B1 (fr) | 2020-09-18 |
FR3074197A1 (fr) | 2019-05-31 |
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