FR2617214A1 - INSTALLATION FOR SPRAYING ROAD COATING PRODUCTS - Google Patents

Abstract

The invention relates to an installation for spraying road surfacing products, of the type comprising at least one spray unit having a lower chamber which is supplied at its upper part with product to be sprayed and which is provided at its base with a sprayer. appropriate. This installation is characterized by the fact that said chamber 10 comprises an inlet 19 and an outlet 22 for cleaning agent which are connected to a circuit allowing this agent to pass through this chamber 10 under a predetermined pressure. Application to public works pavers-spreaders.

Description

The present invention relates to a plant for spraying.

  paving products, intended in particular to be mounted on a spreader-spreader which is a public works machine well known to specialists in the field.

  More specifically, this is a question of such

  of the kind comprising at least one spray block

  with a lower chamber which is fed at its upper part with a spray and which is provided at its base with a suitable sprayer, the latter spraying on the road to be coated with a coating which is

example of bitumen.

  These facilities have a number of disadvantages and, in particular, a tendency to

  certain to a very rapid fouling of their spraying.

  which requires dismantling and cleaning them frequently.

  quently. These operations are long and tedious, and they interrupt the work in progress, with all the resulting consequences for cost and quality.

coating.

  Therefore, it is an object of the present invention to provide an installation for spraying paving products which overcomes these disadvantages, while

  being perfectly reliable and relatively inexpensive.

  According to the invention, this object, and others which appear

  later, are reached through a

  of the kind specified above which is characterized by the fact that this chamber includes an entrance and an exit

  cleaning agents which are connected to a

  causing this agent to traverse it under a predetermined pressure

completed.

  The cleaning agent in question can be a sol-

  chlorine compatible with safety and environmental protection regulations, such as the one sold under the trade name "Solvethane", but it can also be used in combination with the use of solvents; m1 ap jamied Tnb apuvamooaia. na januçm auTqoa a eaneTagdns eTavd us V% umaasna2vmuvaà puead Sg -moo ucTms $ gSI nd apoolq np axqumqo vI 'aino ug anuTuTp ml'% uauissaAuT 'aSQssTIAEp uos anb% uipuadeo' lddua ap ao; oT -s auergnu 'aouanbasuoo ap aloA lmd '% ae ozsaa np ananguol I enuTuiTp' laue ms suvp 9msSmd s-Faeuno% a, p a-dmaxa avd uaKou nm alTnop 0C asao ap aBvssTA al anb '% ajje ua' puaiduoo uo 'aqmqo ml ap puoa al sump nInon IToipuaI , nban essTA uol enb aut; q aglal; allTnop aun years aTnddv, s alsTq mI - aagsoddo uoTssaadmoo ap% aossaa np,% egaxaI nb inBT% nu eoVaS nualqo Ise laddmi ap aolo aeao ap asalSga al 'aouasa), ad alqugIa9% sa Iaddea ap oaoo; mI% uop uoTssamadoo ap% xossa avd '<asTaiInd% Tnpold ua uoT% 4euauTIm, I saaA ouop% a' uSeS uos ans agssnodai his Tnb alITq to aud qn% IT4 -suoo% his cadvio ao 'uoT,% sTI, a ap amloj aun uoleS -Itnas 0O ao ap snossap-nm uoTssead a ^ ao aeqmoaa% uesi- ua essqd

  a% ao jaa9zg, p 4a '% 19Togad I Tnas np snssap-ne ImsT.laAlnd -

  % Inpoid np uoTsseid I% ueamu2 ua uoTIIsT9AInd ap asvqd ml a-: noa ua ea,. Am ap -4iDuiid ToaD) e -auTmlaa% pqad analvA to the ainItIlIuT% se X xasTiaQAind? ITnpoad np uoTssaad gI - enbs-Ic uoT% 4uTy a% ao ap axedips mI Tnb 4edelo a lasTaiaIAnd% tnpoad uaTi4% uulti uos% IoddQj aud Tvae ua SgE m aanagdns aIled ms e pueidmoo UOT4UBAUTI, ap uoTI - _eIsgaIAnd ap oolq np exqm-qo mI ', uauasnaegvmuAv SUOTI.llvsuT i saella% ap suep ToT, nbsn Taiuoouaa uo, [enb sqino -IP; Ip salt ooa oaàv% a 4uamaldmTs pnosga 'a4umueadans a, aTum ap' anseu a %% ao anb amsuoo u0 'guoloid -aG a sgamd no /% a% uea' luuinbTl. = 91sis '% a', qonoq 4sa slnals -l AGAT AND ITS APPOINTMENT OF ITS UNION, ACHIEVED AN AGGREGATE OF APPROPRIATE APPROPRIATION, WHICH WOULD HAVE BEEN ENTITLED TO THE POSITION OF AN ALPHA PUBA, Invalid Ql ap jed, nl.Tlsuco 9 z son. supply of product to be sprayed and which thus allows the shutdown of one or more sprayers, without it being necessary to stop the set

of the installation.

  Preferably, the cleaning agent entry of the block

  according to the invention comprises an anti-tamper

  return, and its output is provided with a closing valve.

  According to an advantageous embodiment of the

  according to the present invention, its agent circuit

  includes, from upstream to downstream, a tank of

  a pump, the one or more spray blocks mounted in

  parallel, and a recovery tray.

  On the other hand, its circulation circuit of the product to be sprayed can comprise, from upstream to downstream, a product reservoir, a pump, the spray units mounted in series, and a return line to the product reservoir.

  which is provided with a throttle for adjusting the pressure

in the circuit in question.

  In addition, this circuit may include a channel

  the return of the product to be sprayed which is connected immediately downstream of the pump specified above, which includes a control valve and a purge valve,

  and which returns to the reservoir of product to be sprayed.

  Finally, this circuit can also include a

  computer controlled pressure control.

  As has been said above, the installation according to the present invention is intended to be mounted on

  a spreader-spreader, and preferably, this machine

  takes a transversely extending spray boom

  between its wheels, and two additional spray bars

  mounted beyond its rear wheels in relation to its direction of progression. Thus, these wheels do not pass on the coating that has just been made, which avoids damaging it.

  The following description, which does not present

  no limiting character, will allow to understand

  how the present invention can be put into practice.

  It must be read in conjunction with the attached drawings, among-

  which: - Figure 1 shows a sectional view of a spray block according to the present invention; and: - Figure 2 shows schematically the entire installation in which is mounted the block

of spray of Figure 1.

  In what follows, it will be assumed that the block of

  Figure 1 is in its normal position.

  use male during a vertical spray down, which gives full meaning & expressions like

"horizontal" or "superior".

  As can be seen in Figure 1, the spray block

  embodiment according to the invention, generally designated by the reference numeral 1, comprises a body 2 coated with a thermal insulation shell diagrammatically shown at 3 and through which a horizontal channel 4 of large section passes between an inlet 4a and an outlet 4b . The channel 4 is intended to be inserted on a loop described below in detail in which circulates the sub-layer product to be sprayed. A vertical passage 5 extends. down from channel 4 and its opening can be closed by an axial needle 6

  whose vertical movements are controlled by rotation.

  manual or remote control of a valve 7 integral with an axial threaded rod 8 screwed into the top of the body 1 and at the lower end of which is mounted the

needle 6.

  According to a variant avoiding the use of a

  circulation of the product to be sprayed, the horizontal channel

  zontal 4 could be removed, as well as the needle 6 and its control valve 7, and the underlayment product to be sprayed would be injected directly into 9 at the top of the

body 1.

  The vertical channel 5 is extended downwards by an axial chamber 10 of larger diameter which can be closed at its apex by a valve 11 in the form of a ball

  pushed towards its seat 12 by a compression spring 13.

  The lower end of the latter rests on an axial passage bushing 14 which is screwed into the chamber 10 from the bottom and which has a transverse slot 15 at its lower end. It is clear that screwing a

  such socket 14, often called "nipple", thanks to a

  nevis penetrating its slot 15, reduces the length available for the spring 13 and, therefore, of

  adjust the return force acting on the ball 11.

  At its lower part, the chamber 10 contains a filter 16 and is closed by the threaded sleeve 17. a conventional flat jet sprayer 18 which is screwed

in its lower part.

  An inlet 19 of cleaning solvent brought under pressure opens in the lower part of the chamber, at the height of the filter 16, with the interposition of a check valve comprising a ball 20 applied on its seat by a compression spring 21. In its extension, on the other side of the vertical chamber 10,

  extends a solvent outlet 22 provided with a valve 23.

  A plurality of such spray blocks 1 can

  be mounted, thanks to fasteners 24, on a spreader-

  unrepresented finisher and, preferably, they are

  spray-on undercoat and solvent-based

  cleaning with a schematic

  Figure 2 to which we will refer now.

  The underlayment product to be sprayed is contained in a tank 30 provided with a heat insulation 31 and a heating tunnel 32. The flame which heats the latter is supplied with gas through heating / piloting valves 33,

  and the combustion products escape to the upper part of the

  tank 30 through a register 34.

  schematically represented in 35 allows the regulation

  the temperature of the product to be sprayed which is sent into the feed circuit 36 of the blocks of

2 6617214

  spraying 1, through a filter 39, by an emulsion pump 37 short-circuited by a non-return valve 38. The circuit 36 supplies in series the spray blocks 1

  and it returns at 36 'to the top of tank 30.

  For cleaning the filters 16 contained in the

  spray blocks 1 (Figure 1), the latter are

  in parallel on a circuit 40 which connects a reservoir 41 to a recovery tank 42 via a pump

  43 driven by an engine M and short-circuited by a

anti-return pet 44.

  This installation is completed by a second return line of the product to be sprayed 45 which is connected immediately downstream of the pump 37, which comprises a control valve 46 and a three-way purge valve.

  47, and returning at 45 'to the top of tank 30.

  In addition, the main circuit of the product to be sprayed

  ser, 36, comprises, downstream of the spray blocks 1, an adjustable throttle 49 controlled by a regulator 50.

  throttling allows the establishment of the spray pressure

  36. The pressure regulation takes into account the number of Jets put into

  the amount of product that one wishes to spray

  unit of surface and speed of the gear used. A computer can provide this regulation by integrating many other factors, such as the nature of the product to be sprayed or its temperature. The realization of such mechanisms is within the reach of specialists in the field and it will not be described here in more detail. The adjustable throttle 49 is short-circuited by

  a valve 48, ensuring the stirring of the product to pul-

  check and stop spraying.

  The operating mode of this installation is

  the following: the product to be sprayed

  see 30 is brought to the desired temperature, the regulator 35 prohibiting start-up as long as this temperature

7 26 1721 4

  is not reached. The mixing valve 48 being in position

  When open, the pump 37, which sends the product to be sprayed into the circuit 36 and through the blocks 1, is launched.

  11 (Figure 1) prevent its penetration into the chamber.

  10, and, accordingly, its spraying, as long as its pressure in the circuit 36 is less than a predetermined pressure corresponding to the setting of the springs 13 to

means of sockets 14.

  The spraying phase is caused by closing the valve 48. At this moment, thanks to rolling braking exerted by the adjustable throttle 49, the pressure in the circuit 36 increases up to the value determined by the regulator 50, which results in Spraying by the jets 18. On the other hand, it is possible to deactivate one or more sprayers by closing manually or automatically the needle or 6 corresponding to the

average of faucets 7.

  The general stop of the spraying is carried out in

  returning the valve 48 to the open brewing position.

  At the end of a spraying phase, it is pos-

  sible to purge the system by rotating the pump

37 back.

  If need be, and when, for example, one of the

  sprayers of the installation is clogged, and, systematically

  before and / or after a prolonged stop, cleaning is carried out by opening the solvent outlet valve 23 on each spray body 1 concerned (FIG. 1) and

  by starting the motor N of the pump 43 (Figure 2).

  The latter sends through the circuit 40 the solvent contained in the tank 41 against the valves 20 of the spray bodies 1 concerned, the valves 11 of the latter (Figure 1), for their part, avoiding penetration

  solvent in the circuit of the product to be sprayed.

Claims (14)

- CLAIMS -   1. Installation for the spraying of road surfacing products, of the kind comprising at least one block of   sprayer comprising a lower chamber which is   in its upper part in product & spray and that   5. is equipped at its base with an appropriate sprayer, which is   in that said chamber (10) comprises an inlet (19) and an outlet (22) of cleaning agent which are   connected to a circuit (40) for this work agent.   pouring said chamber (10) under a predetermined pressure.   2. Installation according to claim 1, characterized in that said cleaning agent is an organic solvent. 3. Installation according to claim 1, characterized in that said cleaning agent is steam   of water produced by an instantaneous generator.   4. Installation according to any one of the claims   1 to 3, characterized in that the chamber (10) of the spray block (1) comprises at its upper part, but downstream from its supply of product to   spray, a valve (11) which separates it from this   when the pressure of the product to be sprayed is   above a predetermined value.   5. Installation according to claim 4, characterized in that said valve is constituted by a ball   (11) which is pushed back to its seat (12), and to. the SUPPLY TERMINAL   spraying product, by a compressor spring.   sion (13) whose return force is adjustable.   6. Installation according to claim 5, characterized in that the end of said compression spring (13) opposite said ball (11) rests on a socket 26 17214   Threaded thread (14) (15> which is screwed to the   wanted in the bottom of said chamber (10).   7. Installation according to any one of the claims   1 to 6, characterized in that the chamber (10) of the spray block (1) comprises at its upper part a tap (6, 7) manual or remotely controlled which allows the   close to its supply of sprayed product. riser.   8. Installation according to any one of the claims   1 to 7, characterized in that said cleaning agent inlet (19) comprises a non-return valve (20, 21).   9. Installation according to any one of the claims   1 to 8, characterized by the fact that said cleaning agent outlet (22) comprises a closing valve (23).   10. Installation according to any one of the claims   1, 2 and 4 to 9, characterized by the fact that   baked cleaning agent comprises, from upstream to downstream, a solvent tank (41), a pump <43), the block or blocks   spraying devices (1) connected in parallel and a recycling container peration (42).   11. Installation according to any one of the claims   1 to 10, characterized in that said circuit (36) for circulating the product to be sprayed comprises, from upstream to downstream, a product reservoir (30), a pump (37), or the spray blocks ( 1) connected in series, and a return line to the product reservoir (30), which is provided with a throttle for adjusting the pressure in said circuit (36).   12. Installation according to claim 11, characterized in that said circuit (36) for circulating the product to be sprayed comprises a conduit (45) for returning the product to be sprayed which is connected immediately downstream of said pump (37), which includes a control valve 261.7214   (46), as well as a purge valve (47)> and which returns to the   reservoir (30> of product to be sprayed.   13. Installation according to any one of the claims   11il and 12, characterized in that said circuit (36) for circulating the product to be sprayed comprises a   pressure control (47, 49) controlled by computer.   14. Installation according to any one of the claims   tions 1 & 13, characterized by the fact that it   on a spreader-spreader that includes a spray boom   extending transversely between its wheels, and two spray bars mounted beyond its wheels   back to its direction of progression.