FR2706919A1 - Head and boom for spraying binder, such as bitumen, onto a roadway - Google Patents
Head and boom for spraying binder, such as bitumen, onto a roadway Download PDFInfo
- Publication number
- FR2706919A1 FR2706919A1 FR9307944A FR9307944A FR2706919A1 FR 2706919 A1 FR2706919 A1 FR 2706919A1 FR 9307944 A FR9307944 A FR 9307944A FR 9307944 A FR9307944 A FR 9307944A FR 2706919 A1 FR2706919 A1 FR 2706919A1
- Authority
- FR
- France
- Prior art keywords
- piston
- binder
- head
- needle
- projection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- E01C19/12—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 distributing granular or liquid materials
- E01C19/16—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 distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
- E01C19/17—Application by spraying or throwing
- E01C19/176—Spraying or throwing elements, e.g. nozzles; Arrangement thereof or supporting structures therefor, e.g. spray-bars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
- B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
- B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
- B05B1/306—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the actuating means being a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
- B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
- B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
- B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
- B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
- B05B7/1272—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated actuated by gas involved in spraying, i.e. exiting the nozzle, e.g. as a spraying or jet shaping gas
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Nozzles (AREA)
Abstract
Description
TETE ET RAMPE DE PROJECTION DE LIANT,
TEL QUE DU BITUME, SUR UNE CHAUSSEE
La présente invention concerne une tête et une rampe de projection de liant, tel que du bitume, sur une chaussée.BINDER PROJECTION HEAD AND RAMP,
SUCH AS BITUMEN, ON A PAVEMENT
The present invention relates to a head and a binder projection ramp, such as bitumen, on a roadway.
On a déjà proposé des têtes de projection de liant qui comprennent un corps de vanne à l'intérieur duquel peut se déplacer un piston, lequel comporte une extrémité en forme de pointeau adaptée pour obturer sélectivement une ouverture du corps de vanne qui fait communiquer un caisson de distribution de liant avec un orifice de projection, ce dernier étant dans le prolongement de l'extrémité du piston en forme de pointeau. Binder projection heads have already been proposed which comprise a valve body inside which a piston can move, which has a needle-shaped end adapted to selectively close an opening in the valve body which communicates a box binder distribution with a projection orifice, the latter being in the extension of the end of the needle-shaped piston.
Une tête de ce type est décrite par exemple dans le document
WO-A-89 04399.A head of this type is described for example in the document
WO-A-89 04399.
Le document FR-A-2 664 918 se rapporte également à une telle tête, bien que dans les exemples décrits, l'orifice de projection ne soit pas dans le prolongement de l'extrémité en forme de pointeau. Document FR-A-2 664 918 also relates to such a head, although in the examples described, the projection orifice is not in the extension of the needle-shaped end.
Ces têtes sont susceptibles de former une rampe de projection lorsqu'elles sont juxtaposées. These heads are liable to form a projection ramp when they are juxtaposed.
Elles donnent généralement satisfaction dans des conditions normales d'utilisation, Cest-à-dire pour les débits de projection de liant assez élevés. They generally give satisfaction under normal conditions of use, that is to say for the fairly high binder projection rates.
Dans certaines conditions d'utilisation, il est nécessaire de déposer sur la chaussée un simple voile de liant, ce qui nécessite la mise en marche des têtes à de faibles débits d'écoulement. Une telle pulvérisation n'est en pratique pas réalisable car le liant s'écoule sous la forme d'un filet et non pas sous la forme d'un jet. De plus, à ces faibles débits, des problèmes de colmatage interviennent fréquemment. Under certain conditions of use, it is necessary to deposit on the roadway a simple veil of binder, which requires switching on the heads at low flow rates. Such spraying is in practice not feasible because the binder flows in the form of a net and not in the form of a jet. In addition, at these low flow rates, clogging problems frequently occur.
La présente invention a pour but de résoudre ces problèmes en proposant une tête de projection qui fonctionne de manière satisfaisante même à de petits débits d'écoulement de liant, en diffusant celui-ci sous la forme d'un jet. The object of the present invention is to solve these problems by proposing a spray head which functions satisfactorily even at small flow rates of binder flow, by diffusing the latter in the form of a jet.
Ce but est atteint, conformément à l'invention, par le fait que la tête de projection, du type évoqué plus haut, comporte des moyens d'amenée d'air comprimé au niveau de ltextrémité en forme de pointeau du piston et en direction dudit orifice. This object is achieved, in accordance with the invention, by the fact that the projection head, of the type mentioned above, comprises means for supplying compressed air at the point-shaped end of the piston and in the direction of said point. orifice.
Ainsi, le courant d'air généré à l'extrémité du pointeau provoque un effet de Venturi qui favorise l'écoulement du liant L'air sert non seulement de véhicule aux molécules de liant mais sert également de moyen de décolmatage de la tête. Thus, the air flow generated at the end of the needle causes a Venturi effect which promotes the flow of the binder. The air not only serves as a vehicle for the binder molecules but also serves as a means of unclogging the head.
Selon d'autres caractéristiques avantageuses mais non limitatives de cette tête
- les moyens d'amenée consistent en un conduit prévu à l'intérieur du piston
- le conduit s'étend selon l'axe longitudinal du piston
- l'extrémité débouchante du conduit au niveau du pointeau a une section oblongue de manière à générer un jet d'air plat
- le piston comporte des moyens de connexion à une source d'air comprime.According to other advantageous but non-limiting characteristics of this head
- The supply means consist of a conduit provided inside the piston
- the conduit extends along the longitudinal axis of the piston
- the open end of the conduit at the needle has an oblong section so as to generate a flat air jet
- The piston includes means for connection to a source of compressed air.
Par ailleurs, l'invention concerne également une rampe de projection de liant formée d'une juxtaposition de têtes conforme à l'une ou l'autre des caractéristiques énumérées ci-dessus. Furthermore, the invention also relates to a binder projection ramp formed by a juxtaposition of heads conforming to one or the other of the characteristics listed above.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre d'un mode de réalisation préférentiel. Cette description sera faite en référence aux dessins annexés dans lesquels
- la figure 1 est une vue de côté et en coupe d'une tête de projection comprenant une vanne montée sur un caisson de distribution de liant, en position d'écoulement de ce dernier ;
- la figure 2 est une vue partielle de la tête de la figure 1, en position de non écoulement de liant ;
- la figure 3 est une vue en bout de l'extrémité en forme de pointeau du piston.Other characteristics and advantages of the invention will appear on reading the detailed description which follows of a preferred embodiment. This description will be made with reference to the accompanying drawings in which
- Figure 1 is a side view in section of a projection head comprising a valve mounted on a binder distribution box, in the flow position of the latter;
- Figure 2 is a partial view of the head of Figure 1, in the position of non-flow of binder;
- Figure 3 is an end view of the needle-like end of the piston.
Aux figures 1 et 2, un caisson tubulaire 4, de distribution de liant, est représenté partiellement en coupe transversale. In Figures 1 and 2, a tubular box 4, binder distribution, is shown partially in cross section.
Le caisson 4 équipe un véhicule de distribution de liant (non représenté) et est disposé transversalement par rapport à la chaussée, perpendiculairement à la direction d'avance du véhicule. De façon connue, ce caisson est équipé d'une série de têtes identiques distributrices de liant, chacune pourvue d'une buse de pulvérisation, réparties côte-à-côte tout le long du caisson. The box 4 is fitted to a binder distribution vehicle (not shown) and is arranged transversely to the road, perpendicular to the direction of advance of the vehicle. In known manner, this box is equipped with a series of identical binder dispensing heads, each provided with a spray nozzle, distributed side by side along the box.
Les têtes, dont l'une est représentée à la figure 1, sont fixées à la base arrière du caisson. Elles sont composées essentiellement d'un corps de vanne 1, et d'un piston à double-effet 2. The heads, one of which is shown in Figure 1, are fixed to the rear base of the box. They are essentially composed of a valve body 1, and a double-acting piston 2.
Le corps de vanne 1 comprend, de manière usuelle, une partie principale cylindrique 12 qui délimite une chambre de pression 19 dans laquelle est guidé en translation le piston à double-effet 2. La tête du piston, désignée 21, est garnie d'un joint d'étanchéité torique 25. Sa tige 20 est guidée dans une partie cylindrique il du corps 1, de plus petit diamètre que la partie 12, cette partie 11 communiquant latéralement avec le caisson 4 par une ouverture 17. The valve body 1 usually comprises a main cylindrical part 12 which delimits a pressure chamber 19 in which the double-acting piston 2 is guided in translation. The head of the piston, designated 21, is provided with a O-ring seal 25. Its rod 20 is guided in a cylindrical part 11 of the body 1, of smaller diameter than the part 12, this part 11 communicating laterally with the box 4 through an opening 17.
Le fond de la partie 11 est percé d'une ouverture 10 contre laquelle l'extrémité 24, de forme tronconique, de la tige de piston 20 est susceptible de venir s'appliquer de façon à l'obturer. Cette extrémité 24 constitue donc un pointeau. L'ouverture 10 constitue une buse de projection. The bottom of the part 11 is pierced with an opening 10 against which the end 24, of frustoconical shape, of the piston rod 20 is capable of being applied so as to close it. This end 24 therefore constitutes a needle. The opening 10 constitutes a projection nozzle.
Un ressort de compression 3, qui est logé dans la chambre 19, prend appui par l'une de ses extrémités contre le fond opposé 18 du corps 1, et par l'autre contre la tête de piston 21, tendant ainsi à appliquer constamment le pointeau 24 contre l'ouverture 10, en position de fermeture de la vanne. A compression spring 3, which is housed in the chamber 19, bears by one of its ends against the opposite bottom 18 of the body 1, and by the other against the piston head 21, thus tending to constantly apply the needle 24 against the opening 10, in the valve closed position.
L'alésage de la partie Il dans lequel est guidée la tige du piston 20 est garni de bagues d'étanchéité 13, 14. The bore of part II in which the piston rod 20 is guided is provided with sealing rings 13, 14.
La tige de piston 20 se prolonge à l'arrière de la tête 21 par une première partie cylindrique 22 puis une seconde 23, de plus petit diamètre, qui ressort partiellement du corps de vanne par une ouverture étanche 180 et qui est coudée à angle droit à son extrémité. The piston rod 20 is extended behind the head 21 by a first cylindrical part 22 then a second 23, of smaller diameter, which partially emerges from the valve body by a sealed opening 180 and which is bent at right angles at its end.
Conformément à l'invention, le piston, dans ses parties 20 à 24 est traversé par un conduit cylindrique 200 qui débouche d'une part au niveau de l'extrémité 24 et d'autre part à l'extrémité libre de la partie cylindrique 23. Sur celle-ci est branché un tuyau 5. According to the invention, the piston, in its parts 20 to 24, is crossed by a cylindrical conduit 200 which opens on the one hand at the end 24 and on the other hand at the free end of the cylindrical part 23 A hose 5 is connected to this.
Le conduit s'étend selon l'axe longitudinal du piston. The conduit extends along the longitudinal axis of the piston.
Le tuyau 5 est branché sur une source d'air comprimé de façon à pouvoir alimenter sélectivement le conduit 200. The pipe 5 is connected to a source of compressed air so as to be able to selectively supply the pipe 200.
Du côté de Irextrémité 24, le conduit forme une ouverture plate et oblongue 240. On the side of the end 24, the duct forms a flat and oblong opening 240.
Des trous taraudés 15, 16 prévus dans la partie 12 respectivement en avant (côté caisson 4) et en arrière de la tête de piston 21 sont destinés au branchement de conduits d'air comprimé (non représentés), ainsi que cela est bien connu. Tapped holes 15, 16 provided in part 12 respectively in front (box side 4) and behind the piston head 21 are intended for the connection of compressed air conduits (not shown), as is well known.
En l'absence d'air comprimé de chaque côté de la tête 21 (les deux conduits se trouvant à la pression atmosphérique), le piston 3 assure automatiquement la fermeture de la vanne, ce qui prévient la distribution inopinée de liant en cas de défaillance accidentelle de la source d'air comprimé. In the absence of compressed air on each side of the head 21 (the two conduits being at atmospheric pressure), the piston 3 automatically closes the valve, which prevents the unexpected distribution of binder in the event of failure accidental source of compressed air.
Pour réaliser la distribution de liant, on fait arriver par le trou 15 de l'air comprimé dans la chambre 19, à l'avant de la tête de piston 21, sous une pression supérieure à la dureté du ressort 3, (alors que l'autre conduit est mis à la pression atmosphérique), ce qui fait reculer le piston 2 vers l'arrière. Le pointeau 24 libère par conséquent l'ouverture 10 tandis que, simultanément, l'ouverture 17 est libérée. Le liant qui occupe l'espace intérieur du caisson 4 est donc libre de s'échapper via le trou 17 (flèche h),
I'ouverture 10 réalisant la pulvérisation en jet du liant sur la chaussée. Ce jet, représenté en traits interrompus, est référencé J à la figure 1.To carry out the distribution of binder, compressed air is supplied through the hole 15 in the chamber 19, at the front of the piston head 21, under a pressure greater than the hardness of the spring 3, (while the 'other conduit is put at atmospheric pressure), which causes the piston 2 to move backwards. The needle 24 therefore releases the opening 10 while, simultaneously, the opening 17 is released. The binder which occupies the interior space of the box 4 is therefore free to escape via the hole 17 (arrow h),
The opening 10 carrying out the spraying of the binder on the pavement. This jet, shown in broken lines, is referenced J in FIG. 1.
Si le débit de liant est suffisamment élevé sa diffusion au travers de l'ouverture 10 se fait facilement et sans problème. Dans ce cas, Iralimentation en air comprimé du conduit 200 est coupée. If the binder flow rate is high enough its diffusion through the opening 10 is done easily and without problem. In this case, the compressed air supply to the conduit 200 is cut.
Pour cesser l'épandage de liant, la face avant de la tête de piston 21 est mise à la pression atmosphérique, tandis que de l'air comprimé est amené par le trou 16 du côté de sa face arrière. De manière bien connue, ceci se fait au moyen d'une valve à trois voies, apte à faire communiquer sélectivement l'une des deux voies d'entrée 15, 16 avec la source d'air comprimé, et l'autre avec la pression atmosphérique. To stop spreading the binder, the front face of the piston head 21 is brought to atmospheric pressure, while compressed air is supplied through the hole 16 on the side of its rear face. As is well known, this is done by means of a three-way valve, capable of selectively communicating one of the two inlet channels 15, 16 with the source of compressed air, and the other with the pressure. atmospheric.
Lorsque Iton souhaite distribuer du liant sous la forme d'un voile, c'est-à-dire à faible débit, par exemple de l'ordre de 300 g/m2, on procède de la même façon que décrit précédemment mais en faisant circuler de l'air comprimé AC (flèches, figure 1) au travers du conduit 200. When Iton wishes to distribute binder in the form of a veil, that is to say at low flow rate, for example of the order of 300 g / m2, the procedure is the same as described above but by circulating compressed air AC (arrows, Figure 1) through line 200.
Celui-ci diffuse au travers de Itouverture 240 sous la forme d'un jet plat.This diffuses through Itouverture 240 in the form of a flat jet.
Bien entendu, la position du piston 2 est réglée de façon à obtenir le débit souhaité.Of course, the position of the piston 2 is adjusted so as to obtain the desired flow rate.
Par effet Venturi, le courant d'air ainsi créé favorise l'écoulement de liant, lequel est mis en suspension dans l'air. L'air agit donc comme véhicule mais également comme moyen de décolmatage. By the Venturi effect, the air flow thus created promotes the flow of binder, which is suspended in the air. Air therefore acts as a vehicle but also as a means of unclogging.
De préférence, le pilotage des arrivées d'air comprimé au niveau des ouvertures 15 et 16 est géré à l'aide de moyens appropriés de type connu, de telle sorte qu'une rampe de pulvérisation comprenant plusieurs têtes conformes à l'invention permet un épandage variable d'une extrémité à l'autre de la rampe, dans la mesure où les têtes distribuent du liant à des débits différents. Preferably, the control of the compressed air inlets at the openings 15 and 16 is managed using appropriate means of known type, so that a spraying boom comprising several heads in accordance with the invention allows a variable spreading from one end to the other of the boom, insofar as the heads distribute binder at different rates.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9307944A FR2706919A1 (en) | 1993-06-24 | 1993-06-24 | Head and boom for spraying binder, such as bitumen, onto a roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9307944A FR2706919A1 (en) | 1993-06-24 | 1993-06-24 | Head and boom for spraying binder, such as bitumen, onto a roadway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2706919A1 true FR2706919A1 (en) | 1994-12-30 |
| FR2706919B3 FR2706919B3 (en) | 1995-09-08 |
Family
ID=9448705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9307944A Granted FR2706919A1 (en) | 1993-06-24 | 1993-06-24 | Head and boom for spraying binder, such as bitumen, onto a roadway |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2706919A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006030365A1 (en) * | 2004-09-17 | 2006-03-23 | Huzar Power Sp. Z O. O. | Working - fluid injector for a piston steam engine |
| CN101979148A (en) * | 2010-11-02 | 2011-02-23 | 陕西长大实业有限公司 | Asphalt spray nozzle |
| CN109235200A (en) * | 2018-10-19 | 2019-01-18 | 广东华起建设工程有限公司 | A kind of venturi effect heated bitumen nozzle assembly and synchronous spread heated bitumen paver |
| WO2020119867A1 (en) * | 2018-12-10 | 2020-06-18 | Lübbers Anlagen- und Umwelttechnik GmbH | High-pressure valve for an atomizing nozzle, and method for rinsing a high-pressure valve |
-
1993
- 1993-06-24 FR FR9307944A patent/FR2706919A1/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006030365A1 (en) * | 2004-09-17 | 2006-03-23 | Huzar Power Sp. Z O. O. | Working - fluid injector for a piston steam engine |
| CN101979148A (en) * | 2010-11-02 | 2011-02-23 | 陕西长大实业有限公司 | Asphalt spray nozzle |
| CN101979148B (en) * | 2010-11-02 | 2015-08-26 | 陕西中土重工机械有限公司 | A kind of Asphalt-distributing spray head |
| CN109235200A (en) * | 2018-10-19 | 2019-01-18 | 广东华起建设工程有限公司 | A kind of venturi effect heated bitumen nozzle assembly and synchronous spread heated bitumen paver |
| CN109235200B (en) * | 2018-10-19 | 2024-04-02 | 广东华起建设工程有限公司 | Venturi effect hot asphalt nozzle assembly and synchronous spraying hot asphalt paver |
| WO2020119867A1 (en) * | 2018-12-10 | 2020-06-18 | Lübbers Anlagen- und Umwelttechnik GmbH | High-pressure valve for an atomizing nozzle, and method for rinsing a high-pressure valve |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2706919B3 (en) | 1995-09-08 |
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