FR2611767A1 - REGENERATION WORKSHOP OF A PAVEMENT - Google Patents

Abstract

1. Workshop for regenerating a road, capable of moving on the latter to regenerate the surfacing on it, and consisting of a self-propelled vehicle comprising, in the direction of travel (A), milling devices (I), devices (II) for mixing the milled products with the addition of a regenerating binder as well as devices (III) for distributing on the road the surfacing thus treated, and smoothing and pre-compacting devices (IV), workshop characterised in that the milling devices (I) consist of a milling rotor (5) which can be moved transversely, or first rotor, and a fixed milling rotor (6) or second rotor disposed behind the first rotor (5) as seen from the direction of travel (A) of the vehicle, the said two rotors, (5, 6) each disposed in a crushing chamber (5', 6',) fitted with crushing bars (8, 8', 10, 10') consisting of a driving tube (50, 60) disposed approximately at right angles to the direction of travel (A) and onto which three helixes are welded each fitted with a series of teeth (7).

Description

26 1 1767

  The present invention relates to a regeneration workshop of a roadway, able to move on it to cold regenerate asphalt, which may consist of asphalt concrete, serious form emulsion, severe asphalts, etc ...

  The very important development of the circula-

  road transport, in particular that of heavy vehicles such as trucks, the problems of setting off the road network, etc., require

roadways.

  However, the various solutions envisaged so far are only partial solutions

  intended to extend by a few years the duration of

  certain road routes, without however

  ensure proper reinforcement.

  To remedy these drawbacks, we sought

  to develop regeneration devices that allow

  efficient reinforcement of pavements for a very long time and for a very low cost, much lower, in most cases at the cost of

temporary maintenance work.

  These devices which allow an "in situ" reinforcement of a roadway are generally constituted by

  a self-propelled vehicle comprising, in the sense of advance

  milling devices, mixing devices,

  milled products with the addition of a regenerating binder

  and distribution units on the roadway

asphalt so treated.

  The regeneration binder used is most often constituted by bitumen, an emulsion or bitumen

  fluxed or any other hydrocarbon binder.

  Despite their advantages, these devices do not

  are not shown totally satisfactory.

  The present invention aims to remedy

  these disadvantages by proposing a regeneration workshop

  of a type of the above type, characterized in that the milling members are constituted by a transversely displaceable milling rotor or first rotor, and by a fixed milling rotor or second rotor disposed behind the first rotor, in the direction of advancement

  vehicle, these two rotors, each arranged in a chamber

  decohesion with decohesion bars being

  constituted by a drive tube disposed substantially

  transversely in relation to the direction of advancement

  on which are welded three coils

each of a series of teeth.

  The teeth of the turns are, most often,

  equipped with tungsten carbide tips.

  The decohesion bars disposed in the two decohesion chambers conventionally have the purpose of limiting the passage between the rotor and the housing,

  in order to allow the bursting of the coated materials.

  According to the invention, it is advantageous to provide, in addition to fixed decohesion bars, a movable decohesion bar, mounted on the lower part of the decohesion chambers and associated with an adjustable system, making it possible to limit the height thereof by ground ratio, and reduce the distance separating it from the spikes

teeth.

  According to another characteristic of the invention, the two decohesion chambers are provided, at their front part, with water injectors capable of cooling the

teeth and fix the dust.

  According to another characteristic of the invention, the first milling rotor is provided with a paddle wheel fed by the turns of this rotor which projects the products milled by it into a chute which transfers them into the decohesion chamber of the rotor. second rotor

milling.

  This characteristic is likely to improve

  notably the transport of milled products.

  According to another characteristic of the invention, the mixing members, fed by the turns of the second rotor, are constituted by a mixing tank provided, at its front part, with an injection ramp of the hydrocarbon regeneration binder at a flow rate proportional to the flow rate of milled products and two mixing shafts arranged longitudinally with respect to the direction of the vehicle and on which are mounted arms including interchangeable pallets arranged to form a turn which, while kneading

  products from the deco

  second milling rotor, rejects them at the rear

  of the vehicle in front of the dispatching units.

  According to the invention, it is advantageous to provide, at the outlet of the mixing tank, a hatch for keeping the level of the products in the tank constant, whatever the speed of advance of the machine. to improve

the quality of the mixing.

  According to another characteristic of the invention, the mixing tank is provided with a double-jacketed bottom filled with special cast iron wear plates and whose internal space is heated by the exhaust gas of the vehicle,

especially the Dièsel vehicle.

  This characteristic is likely to diminish

  the cost price of the treatment according to the invention.

  According to another characteristic of the invention, the workshop comprises, below the mixing tank,

  a spreading ramp on the roadway, before distribution

  regenerated mixes with a layer of adhesion

  constituted by a hydrocarbon binder.

  The presence of this binder is essential for

  obtain satisfactory pavement after treatment.

  According to another characteristic of the invention, the spreading ramp of the hydrocarbon binder of the bonding layer is constituted by at least one carriage provided with an injector which sweeps transversely the milled surface in order to distribute a homogeneous layer of hydrocarbon binder to a flow proportional to the surface to

treat.

  Given the very low flow rates to be distributed by the injectors, it is indeed impossible, in accordance with the invention, to provide a fixed ramp provided with several injectors to less than

  pneumatically transporting the hydrocarbon binder.

  According to another characteristic of the invention, suction members mounted behind the two milling rotors in the direction of movement suck the dust produced during milling, thus ensuring a cleaning of the roadway and allowing the binder of the attachment to ensure satisfactory bonding between the milled pavement and regenerated asphalt. According to another characteristic of the invention, the distribution members on the pavement of the regenerated mixes are constituted by a right distribution screw and a left distribution screw, as well as by a vibrating height-adjustable vibrating table with organs

  reheating, which distributes and compacts the

  this table is equipped with knives

  the vertical displacement provides a pre-compaction

  floor. The reheating organs of the surface

  may be unspecified in accordance with the

  vention (gas, oil, electric). According to another characteristic of the invention,

  the vibratory smoothing table is worn at both ends.

  mites superior, by two articulated arms on the

  frame of the machine, the anchorage points of these

  culations being mounted on slides and likely

  to be adjusted in height by means of cylinders.

  These cylinders can be ordered either manually

  by means of solenoid valves either automatically

  only through a leveling system

automatic.

  In addition, this system can operate either with an altimetry probe on each side of the vehicle, or with a touch probe on the left and a slope detector, or

  with a probe on the right and a slope detector.

  According to another characteristic of the invention,

  mixing devices as well as the distribution devices

  are mounted on a trolley for clearing

the rear of the vehicle.

  This configuration makes it possible to clear the rear of the vehicle for easy maintenance and, where

appropriate, troubleshooting.

  According to another characteristic of the invention, the workshop comprises an electronic computer capable of ensuring the regulation of the water distribution pumps, the binding binder and the regeneration binder from the set values of the contents of the these three materials per square meter or cubic meter, the working width and the density of milled materials, as well as

  information transmitted by an electronic system

  which measures the forward speed of the vehicle, and by an altimetry sensor on the right which gives the height of the milling on the right and an altimetry probe on the left

  which gives the height of the milling on the left.

  From this information, the computer sends instructions to the engine plates

  direct current drives each of the pumps.

  Thus, the flow rate of the water is proportional to the volume of the treated materials, hence a constant weight ratio, while the rate of binding binder is proportional to the treated surface and the rate of regeneration binder proportional to the volume. treated materials. According to another characteristic of the invention, the workshop comprises a flush of air which, at each stop of the vehicle and after delay, empties the injection pipes of the regeneration binder and the binder of the bonding layer so that these two binders do not freeze

  not in the injection lines.

  The characteristics of the workshop which is the subject of the invention will be described in more detail with reference to the appended drawings in which: FIG. 1 is a plan view of the workshop,

  - Figure 2 is a side section thereof.

  According to Figures 1 and 2, the workshop is

  killed by a self-propelled vehicle driven by a diesel engine 1 and whose support frame 2 is based on two

  front tracks 3, 3 'and two rear tracks 4, 4'.

  This vehicle comprises successively in the direction of advance A, milling members I, kneading members II, distribution bodies III on the pavement once treated and

  smoothing and precompacting devices IV.

  The milling members I consist of a first milling rotor 5 transversely displaceable along the arrow B as shown in dashed lines in FIG. 1, and by a second fixed milling rotor 6 arranged behind the first milling rotor 5, in parallel

to this one.

  According to Figure 2, each of the rotors 5, 6 is disposed in a decohesion chamber 5 ', 6'. These rotors 5, 6 are each constituted by a drive tube, 60 disposed substantially transversely to the direction of advance A (Figure 1) on which are welded three turns each provided with a series of teeth

  7 equipped with tungsten carbide tips.

  According to FIG. 2, the decohesion chambers ', 6' are provided with decohesion bars 8, 8 ', 10, 10' intended to limit the passage left free for the milling products between the housings and the milling rotors. 5, 6 so as to allow the bursting of the

coated materials.

  According to the configuration shown in FIG. 2, the decohesion bars 8 and 8 'are fixed whereas the decohesion bars 10' disposed at the front lower part of the decohesion chambers 5 'and 6' are associated with organs not shown which limit their height relative to the ground XX 'and reduce the distance between these bars 10 and' of the teeth of the milling rotors 5 and 6 and

  to avoid the lifting of the asphalt plates.

  The decohesion chambers 5 ', 6' are also respectively provided with cleaning blades and

  9, 9 'which cooperate with suction members

  ration not shown mounted behind the milling rotors 5 and 6 in the direction of travel to suck the dust produced during milling, thus ensuring a cleaning of the roadway for satisfactory adhesion of a binder which will be described more

  in detail later in this presentation.

  The two decohesion chambers 5 'and 6' are, moreover, provided with unrepresented water injectors whose purpose is to cool the teeth 7 and fix

dust.

  In a manner not shown, the first milling rotor 5 cooperates, moreover, with a paddle wheel fed by the turns of this rotor which projects the products milled by it into a chute 11 which transfers them into the decohesion chamber 6 ' of

second milling rotor 6.

  Moreover, according to FIGS. 1 and 2, the mixing members II which are fed by the turns of the second milling rotor 6 'are constituted by a mixing tank 12 containing two mixing shafts 13, 13' arranged in parallel and longitudinally by

  report to the direction of movement of the vehicle.

  Each of these shafts 13, 13 'carries arms 14 to

  ends of which are interchangeable pallets

  gables 15 arranged so as to constitute a turn which while strongly mixing the products from the decohesion chamber 6 'of the second milling rotor 6, rejects them at the rear of the vehicle, in front of the

distribution bodies III.

  According to FIG. 2, the mixing tank 12 is further provided, at its front part, with an injection ramp 16 of a regeneration binder that may consist of bitumen, an emulsion, fluxed bitumen or any other hydrocarbon binder; the flow rate of this ramp must, of course, be proportional to the flow rate of milling products introduced into the tank 12. A hatch 17 (FIG. 2) mounted at the rear of the tank 12 makes it possible to keep the level of the products in this vessel constant. last what

  the speed of advancement and, consequently, improvement

improve the quality of mixing.

  In a manner not shown in the figures, the tank 12 is provided with a bottom 18 with a double jacket which is lined with special cast iron wear plates and whose internal space is heated by the exhaust gases.

  Diesel of the vehicle. or by a coolant.

  A ramp 19 provided below the tank 12 allows, moreover, to spread on the roadway X-X ',

  after milling, but before distribution of the reg-

  nteres, an attachment layer consisting of a hydrocarbon binder.

  Given the low flow rates to be dis-

  tribute to this ramp 19, it is actually

  staged by a not shown carriage provided with an injector which moves transversely on a slideway to spread on the milled surface, a homogeneous layer of hydrocarbon binder at a rate proportional to the surface

treat.

  According to FIGS. 1 and 2, the

  Ture III on the pavement XX 'of the regenerated mixes consist mainly of a distribution screw 20. The smoothing and precompacting elements IV consist mainly of a vibratory smoothing table 21 adjustable in height and provided with heating members 22 of its lower surface 23 which distributes smooth and

  compact the regenerated mixes.

  According to FIG. 1, the distribution screw 20 decomposes into a straight part 24 and a left part 25

  which allow to spread the product on the pavement X-X '.

  According to Figure 2, the vibrating table 21 is carried at its two upper ends by two arms 26, 26 'which are articulated on the frame 2 of the vehicle by their ends 27; the anchors of these

  joints 27 are mounted on slides not shown.

  The jacks 28 can be manually controlled via solenoid valves or automatically via the cylinder.

  an automatic leveling system.

  A jack 29 is, moreover, mounted between the chassis 2 of the vehicle and the upper part of the arms 26, 26 'to allow the lifting of the table 21 during transfers. This table 2l is, moreover, provided at its front portion tampers 30 whose vertical reciprocating movement ensures precompacting. This table 21 is provided, on the other hand, with a vibration system which

  ensures correct working of the smoothing surface 23.

  Preferentially and not shown in the figures, the mixing members II and the distribution members III are mounted on a carriage which allows the rear of the vehicle to be released to facilitate

maintenance and troubleshooting.

  In addition, the flow rates of distribution pumps

  water delivery 31 as well as distribution pumps of the binder 32 and the regeneration binder 33

  are automatically controlled by an electronic calculator

  not shown from the reference values of the contents of the three abovementioned materials per square meter or cubic meter, the working width, the density of the milled materials as well as the information transmitted by an electronic system which measures the

  speed of the vehicle and by an altitude sensor

  metric on the right which gives the height of the milling on the right and an altimetry probe on the left which gives the height

milling left.

  In addition, a flush of air, too, does not re-

  shown, allows each stop of the vehicle and after delay to empty the injection pipes of the regeneration binder and the binder of the bonding layer so that these two binders do not become fixed in the injection pipes, these pipes being themselves warmed

  by a network of electrical resistances or a heat

carrier. It

RE V E N D I C A T I O NS

  1) regeneration workshop of a roadway, capable of moving thereon to regenerate the asphalt mix, and constituted by a self-propelled vehicle comprising, in the direction of travel (A), milling members (I), kneading devices (II) for milled products with the addition of a regeneration binder and distribution units (III) on the pavement of the mixes thus treated, and smoothing and precompacting elements (IV), characterized in that that the milling members (I) are constituted by a transversely displaceable milling rotor (5) or first rotor and by a fixed or second rotor milling rotor (6) arranged behind the first rotor (5) in the direction of advancement (A) of the vehicle, these two

  rotors (5, 6) each arranged in a chamber of deco

  (5 ', 6') provided with decohesion bars (8, 8 ', 10,') being constituted by a drive tube (50, 60) arranged substantially transversely to the direction of advance (A) and on which are welded three

  turns each provided with a series of teeth (7).

  2) workshop according to claim 1, characterized

  rised in that the two decohesion chambers (5 ', 6')

  have, at their front end, water injectors

  These can cool the teeth and fix the dust.

  3) Workshop according to any of the claims

  cations 1 and 2, characterized in that the first milling rotor (5) is provided with a paddle wheel fed by the turns of this rotor which projects the products milled by it into a chute (11) which transfers them in the

  decohesion chamber (6 ') of the second milling rotor (6).

  4) Workshop according to any one of the

  cations 1 to 3, characterized in that the organs of mala-

  xage (II), fed by the turns of the second rotor (6), are constituted by a mixing tank (12) provided, at its front part, with an injection ramp (16) of the hydrocarbon regeneration binder at a proportional flow rate of the milled products as well as the two trees

  mixing knives (13, 13 ') arranged longitudinally with

  port to the direction of movement (A) of the vehicle and on which are mounted arms (14), in particular provided

  interchangeable pallets arranged in such a way as to

  sting a coil which, while mixing

  from the decohesion chamber (6 ') of the second milling rotor (6), discharges them at the rear of the

  vehicle in front of the distribution units (III).

   ) Workshop according to any one of the

  1 to 4, characterized in that the vat of mala-

  xage (12) is provided with a double-jacketed bottom lined with wear plates of special cast iron and whose space

  internal is heated by the vehicle exhaust.

  6) Workshop according to any of the claims

  cations 1 to 5, characterized in that it comprises below the mixing tank (12) a spreading ramp (19) on the roadway, before distribution of the regenerated mixes,

  an attachment layer consisting of a hydraulic binder

carbon.

  7) Workshop according to any one of the

  dications 1 to 6, characterized in that the ramp (19) for spreading the hydrocarbon binder of the attachment layer is constituted by at least one carriage provided with an injector

  which sweeps the milled surface transversely to

  a homogeneous layer of hydrocarbon binder at one

  flow proportional to the surface to be treated.

  8) Workshop according to any one of the

  cations 1 to 7, characterized in that aspirating members

  mounted in the back of the two milling rotors (5, 6) in the direction of movement (A) suck up the dust produced during milling, thus ensuring cleaning

  pavement and allowing the binder of the

  stitching to ensure a satisfactory collage between the

  milled shoe and regenerated mixes.

  9) Workshop according to any one of the

  cations 1 to 8, characterized in that the distribution members (III) on the pavement of the regenerated mixes consist of a right distribution screw (24) and a left distribution screw (25) while the

  Smoothing and precompacting devices (IV) are

  killed by an adjustable vibrating table (21) in height

  provided with reheating members (22) which divides and

  pact the regenerated mixes, this table (21) being provided with tamping knives (30) whose vertical displacement

  alternative provides precompacting.

   ) Workshop according to any one of the

  cations 1 to 9, characterized in that the smoothing table

  vibrator (21) is carried at both ends

  two arms (26, 26 ') hinged to the chassis

  (2) of the machine, the anchorage points (27) of these

  culations are mounted on slides and can be adjusted in height by means of cylinders (28).

  11) Workshop according to any one of the

  cations 1 to 10, characterized in that the mixing members (II) and the distribution members (III) are mounted on a carriage for disengaging the rear

  the vehicle for easy servicing and troubleshooting.

  ) Workshop according to any one of the

  cations 1 to 11, characterized in that it comprises a

  electronic culator capable of regulating

  water distribution pumps (31),

  stalling (32) and the regeneration binder (33) from

  setpoint values of the contents in these three

  per square meter or cubic meter, the working width and the density of the milled

  information transmitted by an electronic system

  It measures the speed of travel of the vehicle and an altimetry probe on the right which gives the height of the milling on the right and an altimetry probe on the left which gives the height of the milling on the left.

  13) Workshop according to any one of the

  cations 1 to 12, characterized in that it comprises a flush of air which, at each stop of the vehicle, and after delay, empties the injection pipes of the

  regeneration binder and the binder of the

  chage so that these two binders do not congeal in the

injection lines.