EP0496052B1 - Device to spray a fluid bonding agent, especially bitumen - Google Patents

Device to spray a fluid bonding agent, especially bitumen Download PDF

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Publication number
EP0496052B1
EP0496052B1 EP91119672A EP91119672A EP0496052B1 EP 0496052 B1 EP0496052 B1 EP 0496052B1 EP 91119672 A EP91119672 A EP 91119672A EP 91119672 A EP91119672 A EP 91119672A EP 0496052 B1 EP0496052 B1 EP 0496052B1
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EP
European Patent Office
Prior art keywords
control
opening
openings
control element
casing
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.)
Expired - Lifetime
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EP91119672A
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German (de)
French (fr)
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EP0496052A1 (en
Inventor
Joachim Wesner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Breining Maschinen- & Fahrzeugbau U Co GmbH
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Robert Breining Maschinen- & Fahrzeugbau U Co GmbH
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Publication of EP0496052A1 publication Critical patent/EP0496052A1/en
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Publication of EP0496052B1 publication Critical patent/EP0496052B1/en
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    • 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

Definitions

  • the invention relates to a device for spraying liquid binder, in particular bitumen, of the type mentioned in the preamble of claim 1.
  • Known devices for spraying out liquid binder, in particular bitumen, are used in spraying devices which are used as distributors e.g. have an internally hollow spray bar which is fed under pressure with the liquid binder, the spray bar for each spray device containing its outlet opening which is either closed or opened at this point for spraying.
  • spraying devices of this type e.g. the spray devices arranged in rows on the spray bar, each spray device being provided with a working cylinder for actuating the closure member.
  • each individual spraying device is provided with an associated control device which controls the working cylinder in different positions.
  • a device of the type mentioned at the outset (FR-A-2 407 751) is known for spraying out liquid binders serves.
  • the device has a distributor which is connected to a binder source and contains outlet openings for the binder.
  • the device also has a closure member which closes or releases the respective outlet opening and can be actuated by an actuating device.
  • the closure member is contained in a housing which contains openings which, on the one hand, are connected to the interior of the distributor and, on the other hand, can be connected to the outlet opening depending on the respective position of the closure member.
  • the liquid binder to be sprayed out for example bitumen, to be sprayed onto the surface of a road or the like is at a relatively high level within the distributor Pressure, for example in the order of about 2 to 2.5 bar.
  • Pressure losses occur which increase with the length of the distance to be covered.
  • Pressure losses compared to normal operating pressure can be relatively large and cannot be manageable, so that difficulties usually arise when applying the liquid binder.
  • An increase in the operating pressure to counter these difficulties is out of the question; because the binder already exits at too high a pressure inside the distributor under the system pressure, namely in the form of a fog, as a result of which the binder is blown away and there are also impaired visibility. Above all, however, this results in an unacceptable environmental impact.
  • the invention has for its object to provide a device of the type mentioned in the preamble of claim 1, which requires a change in the spray quantity and / or the spray pressure per individual spray device and thus for the entire device a variable transverse distribution in adaptation to the transverse nature of the splashing surface, especially street.
  • the spray pressure and the spray quantity of the binder to be sprayed out of the outlet opening can thus be controlled in each individual spraying device of a spraying device in accordance with the respective requirement.
  • the control element of each device is adjusted in the control housing, depending on the required spray quantity and spray pressure, into the respectively assigned position, in which respectively assigned control openings in the control housing are blocked or released.
  • the spray pressure and the spray quantity per spray device can be changed simply and reliably, so that with a spray device which has a large number of individual spray devices of the type mentioned, a dimensionally transverse distribution of the binder to be sprayed out in terms of quantity and pressure in adaptation to the transverse properties the surface to be sprayed, e.g. street.
  • the spray pressure can thus be adjusted to different sizes in a particularly simple manner, as can the spray quantity.
  • the change in the spray pressure and the spray quantity can take place digitally, ie batchwise, or analogously, ie continuously and continuously.
  • a spray device 10 which is used for spraying and spraying a liquid binder, for example bitumen, onto surfaces, for example onto the surfaces of streets.
  • a liquid binder for example bitumen
  • Such spray devices are generally known, for which reference is made to DE-U-89 15 041.
  • Such spray devices 10 are, for example, hung on a truck and pulled across the road at an approximately constant speed.
  • the spraying device 10 has one or more distributors 11, in particular spray bars, which are, for example, tubular and whose interior 12 is fed with the liquid binder, in particular bitumen, from a source (not shown) via invisible nozzles, the binder being under pressure is fed.
  • the spraying device 10 has individual spraying devices 13 which are placed at intervals from one another along the longitudinal extent of the distributor 11.
  • Each spray device 13 is designed as a spray valve, which e.g. is either open and then allows the liquid binder to exit or is closed instead.
  • Each spray device 13 has an outlet opening 14 on the distributor 11, which can be closed or released by means of a closure member 16.
  • An actuating rod 17 engages on the closure member 16 and is aligned coaxially therewith.
  • the spray device 13 also includes a pressure medium-operated working cylinder 18, which is formed from a cylindrical housing 19 with a cylinder space therein and a piston located therein. The working cylinder 18 is arranged coaxially to the actuating rod 17 and engages the latter to actuate it and thus to actuate the closure member 16.
  • the spraying device has a control device, which is associated with the working cylinder 18 and is not shown here, which is placed on top of the working cylinder 18, for example, and one of the means for actuating the closure member 16 Chamber located on both sides of the piston of the working cylinder 18 can be acted upon with pressure medium.
  • the working cylinder 18 thus forms an actuating device for the actuating rod 17 and thus for the closure member 16.
  • a special feature of the spray device 13 according to the first exemplary embodiment is that the closure member 16 is designed as a control member 19 and is contained in a special control housing 20.
  • the control housing 20 contains control openings 21 and 22 which can be controlled by the control member 19 and which on the one hand are connected to the interior 12 of the distributor 11 and which on the other hand can be connected to the outlet opening 14 depending on the respective position of the control member 19.
  • the control member 19 is designed as an axially displaceable control piston, which e.g. is cylindrical.
  • the control member 19 has an annular groove 23 which forms control surfaces 24 and 25 with the flanks delimiting the annular groove and with the circumferential surfaces adjoining it on both sides, which control the control openings 21, 22.
  • the control housing 20 has a sleeve 26 which in its wall 27 has through openings 28 and 29 which are spaced apart from one another in the axial direction and form the control openings 21 and 22, respectively.
  • these through openings 28, 29 are covered and closed by the latter, for example by its control surfaces 24, 25, or can be released instead, namely when the annular groove 23 is in overlap with one through opening 28 or the next one Through opening 29 is.
  • the control openings 21, 22, in particular through openings 28 and 29, have differently sized opening cross sections.
  • the opening cross section of the through opening 28 is larger than that of the through opening 29.
  • the Through openings 28, 29 are, for example, bores in a simple manner, which thus have different diameters.
  • the arrangement is selected such that either the control opening 21 with the larger opening cross-section can be optionally released by the control member 19, the other control opening 22 remaining closed by means of the control surface 25, or that instead the next control opening 22 with a smaller opening cross-section can be released , in which case the other control opening 21 is covered and closed by the control surface 24.
  • control member 19 can selectively first open the one control opening 21 and then, after a further displacement path, in addition to the control opening 21, the next following control opening 22 as well, thus here no "OR circuit” but an "AND circuit” instead.
  • the control housing 20 has a space 30 or channel or the like which is in permanent communication with the annular groove 23 of the control member 19 and which can also be connected to the outlet opening 14.
  • the space 30 is formed by a housing wall part 31 of the control housing 20 which surrounds the control member 19 on a circumferential side at a radial distance.
  • the latter extends on the side of the control member 19, which is preferably approximately diametrically opposite that part of the housing wall in which the control openings 21, 22, in particular through openings 28, 29, are contained and on which the control member 19 with its outer peripheral surface on the inside is covered or Release of the control openings 21, 22 is present.
  • This arrangement is achieved in a simple manner, for example, in that the control housing 20 with respect to the Control member 19 is arranged eccentrically.
  • the space, channel or the like, which establishes the connection between the annular groove 23 and the outlet opening 14, is made of an inner longitudinal groove e.g. formed within the inner peripheral surface of the control housing 20, in which case the control housing 20 can be designed as a cylinder housing coaxial with the control member 19, within which the control member 19 is slidably received and guided, the outer peripheral surface of the control member 19 then being connected to the inner peripheral surface of the cylindrical control housing all around in contact and sliding contact.
  • the control member 19 can also have a space, channel or the like connected to its annular groove 23, e.g. a hole, an outer longitudinal groove or the like. have, this space, channel or the like. then connects the annular groove 23 to the outlet opening 14 in the release position.
  • control housing 20 is held upright within the distributor 11, for example screwed into a corresponding threaded bore 33 of the distributor 11 with a threaded shoulder 32.
  • the control housing 20 with its threaded shoulder 32 can be screwed into an intermediate sleeve, which in turn is held in a bore in the distributor 11.
  • the control housing 20 contains the associated outlet opening 14, which is located in a part integral with the control housing 20 or instead in a separate part that can be screwed into the control housing 20.
  • the outlet opening 14 is arranged at an axial distance from the first control opening 21 located above it, in particular through opening 28.
  • the outlet opening 14 is located coaxially with the control member 19.
  • the outlet opening 14 can be permanently open and thus the control member 19 also ends with its lower end at a distance above the outlet opening 14 in the closed position shown in FIG. 1, in which both control openings 21 and 22 are closed, so that there is a continuous passage between the space 30 and the outlet opening 14.
  • the control member 19 is additionally provided with a closing body 34, which is preferably aligned coaxially thereto.
  • the outlet opening 14 can be closed by means of the closing body 34 in the closed position of the control member 19 shown in FIG. 1.
  • the closing body 34 can be lifted off the outlet opening 14, thereby releasing it.
  • the closing body 34 here is an integral part of the control member 19. Instead, it can also be used as an independent element on the control member 19, e.g. be adjustable.
  • control element 19 through which the control openings 21 and 22 can be controlled, that both the spray quantity and the spray pressure of the binding agent which is under pressure in the interior 12 of the distributor 11 and can be sprayed out can be controlled.
  • the opening cross section of the control openings 21 and 22 is of different sizes and is in each case smaller than that of the outlet opening 14.
  • the working cylinder 18 of the actuating device described can be controlled, for example, in three positions of the control member 19.
  • the first position is shown in FIG. 1. It is the end position which closes the outlet opening 14 by means of the closing body 34, in which the two control openings 21 and 22 are covered and closed at the same time by the control surface 25 above the annular groove 23 of the control member 19. This means that no binding agent is under pressure in the interior 12, pass through the control openings 21, 22 into the space 30. Since the closing body 34 also sits in the position closing the outlet opening 14 as additional security, even if there are any small leakage currents, should they ever occur, no binding agent can nevertheless emerge via the outlet opening 14.
  • the working cylinder 18 is actuated, which then pulls the control member 19 upward in FIG. 1 via the actuating rod 17, the closing body 34 opening the outlet opening 34.
  • the movement of the control member 19 takes place in an operating position in which the annular groove 23 is at the level of the control opening 21, in particular through opening 28, and has this connection, while the other control opening 22 is covered by the control surface 25 and is therefore closed.
  • pressurized binder in the interior 12 can now pass through the open control opening 21 into the annular space 23 and from there into the space 30 and be sprayed out from there through the outlet opening 14.
  • the control opening 21, in particular through opening 28, represents a control orifice via which the relatively high pressure prevailing in the interior 12 of the distributor 11 is reduced to a lower pressure which then prevails in the space 30 and corresponds to the ejection pressure through the outlet opening 14.
  • the control member 19 in FIG. 1 is raised even further by means of the working cylinder 18 until the annular groove 23 is at the level of the control opening 22 while the other control opening 21 then from the control surface 24 of the control member 19th covered and thus closed. Then, in the interior 12, liquid binder under pressure passes through the smaller control opening 22 through the annular groove 23 into the space 30 and through the outlet opening 14. Because of the smaller control opening 21 in relation to the larger control opening 22, there is a further reduction in the injection pressure and also the spray volume. If the spraying is to be stopped instead, the control member 19 is adjusted again into the closed position shown in FIG. 1 by means of the working cylinder 18.
  • the spraying device 13 thus allows the spray quantity and the spray pressure of the binder to be sprayed out to be controlled in a simple manner.
  • the control housing 20 is provided with a filter device 35, e.g. B. a perforated plate, a mesh or the like. Provided, which is arranged in front of the inlet 11 connected to the control openings 21, 22 and filters any dirt particles located in the interior 12.
  • the filter device 35 is replaceable so that it can be cleaned.
  • Fig. 1 shows that in each case spray nozzles 36 are arranged in the outlet openings 14 of the distributor 11, each of which, for. B. are screwed into the control housing 20 from below.
  • the control housing 20 is interchangeable with another control housing with differently sized and / or differently arranged control openings, so that one can quickly take into account the respective needs with regard to varying spray quantity and varying spray pressure.
  • the control housing 20 has, at least in the area of the control openings 21, 22, an adjustable and / or replaceable diaphragm located above it, e.g. B. a rotationally adjustable and / or axially displaceable sleeve, which in turn contains control openings and through which the control openings 21, 22nd of the control housing 20 are controllable and thus changeable.
  • the sleeve thus forms an orifice for the control housing, in particular its control openings 21, 22, so that this orifice in turn enables the spray quantity and the spray pressure to be adjusted in accordance with the requirements. It is understood that such an aperture, for. B.
  • sleeve with at least one adjustment part from the interior 12 of the distributor 11 can be guided to the outside, so that the sleeve can be adjusted from the outside and thus the work values with regard to the spray quantity and spray pressure of the control housing 20 with respect to the control openings 21, 22 can be changed.
  • control openings 21, 22 which are controllable by the control element 19 are provided which are arranged at a distance from one another
  • control openings z. B channels, slots, slots or the like.
  • z. B. a control opening z. B. be formed by an approximately axially parallel elongated hole in the wall 27, which depending on the axial position of the control member 19 is more or less covered or released by its control surfaces. Widening or narrowing, slot-like openings in the wall 27 are also possible in the axial direction.
  • slots can also be included in the wall 27 of the control housing 20, the z. B. following in the circumferential direction or a helix or in a similar manner obliquely.
  • a control of longitudinal slots and / or circumferential slots by turning the control member 19 instead of an axial displacement is also within the scope of the invention.
  • the control housing 120 is cylindrical.
  • the cylindrical control member 119 is slidably received and guided within the cylindrical control housing 120, the outer circumferential surface of the control member 119 being in abutting and sliding contact with the inner circumferential surface of the cylindrical control housing 120 all around.
  • z. B. on one side contain a plurality of control openings 121, 122 arranged one above the other, which can have different or equal opening cross sections.
  • the control member 119 is cylindrical throughout, with z. B. releasable and a special closing body 134 is attached.
  • the control openings 121, 122 are controlled by the peripheral surface of the control member 119 or by its lower end edge 137 as a control surface.
  • control member 119 In order to first release the lower control opening 121 and to connect it to the space 130 and to the outlet opening 114, the control member 119 is shifted upward in FIG. 3 until its lower end edge 137 is above the control opening 121 but still below the next control opening 122.
  • the control opening 122 is thus covered and closed over the peripheral surface of the control member 119, while the control opening 121 located underneath is opened and opened by the peripheral surface of the control member 119.
  • the liquid bitumen can now pass through this control opening 121 into the space 130 and be sprayed out via the outlet opening 114, specifically with an injection quantity and an injection pressure which is predetermined by the opening cross section of the control opening 121.
  • a slot 138 is shown on the left in FIG. 3 as a control opening, where it is contained in the wall of the control housing 120.
  • This variant allows a constant displacement of the control member 119 in FIG. 3 upwards, so that a larger cross section of the slot 138 is continuously released for the passage of the binder.
  • This variant thus enables a stepless control of the spray quantity and the spray pressure by stepless displacement of the control member 119 relative to the slot 138.
  • the slot 138 which here z. B.
  • control member 119 is arranged approximately axially parallel, in the circumferential direction or along a helix or similarly inclined, so that with axial displacement of the control member an even more sensitive adjustment of the spray quantity and the injection pressure can be made with a relatively small adjustment path of the control member 119.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Catching Or Destruction (AREA)
  • Nozzles (AREA)

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Ausspritzen von flüssigem Bindemittel, insbesondere Bitumen, der im Oberbegriff des Anspruch 1 genannten Art.The invention relates to a device for spraying liquid binder, in particular bitumen, of the type mentioned in the preamble of claim 1.

Bekannte Vorrichtungen (DE-U-89 15 041) zum Ausspritzen von flüssigem Bindemittel, insbesondere Bitumen, werden bei Spritzeinrichtungen eingesetzt, die als Verteiler z.B. einen innen hohlen Spritzbalken aufweisen, der unter Druck mit dem flüssigen Bindemittel gespeist wird, wobei der Spritzbalken je Spritzvorrichtung deren Austrittsöffnung enthält, die entweder verschlossen oder zum Ausspritzen an dieser Stelle geöffnet wird. Bei Spritzeinrichtungen dieser Art sind z.B. die Spritzvorrichtungen in Reihen am Spritzbalken angeordnet, wobei jede Spritzvorrichtung mit einem Arbeitszylinder zur Betätigung des Verschlußgliedes versehen ist. Ferner ist jede einzelne Spritzvorrichtung mit einer zugeordneten Steuereinrichtung versehen, die den Arbeitszylinder auf verschiedene Stellungen ansteuert.Known devices (DE-U-89 15 041) for spraying out liquid binder, in particular bitumen, are used in spraying devices which are used as distributors e.g. have an internally hollow spray bar which is fed under pressure with the liquid binder, the spray bar for each spray device containing its outlet opening which is either closed or opened at this point for spraying. In spraying devices of this type, e.g. the spray devices arranged in rows on the spray bar, each spray device being provided with a working cylinder for actuating the closure member. Furthermore, each individual spraying device is provided with an associated control device which controls the working cylinder in different positions.

Es ist eine Vorrichtung der eingangs genannten Art bekannt (FR-A-2 407 751), die zum Ausspritzen von flüssigem Bindemittel dient. Die Vorrichtung weist einen Verteiler auf, der mit einer Bindemittelquelle verbunden ist und Austrittsöffnungen für das Bindemittel enthält. Die Vorrichtung weist ferner ein die jeweilige Austrittsöffnung verschließendes oder freigebendes Verschlußglied auf, das von einer Betätigungseinrichtung betätigbar ist. Hierbei ist das Verschlußglied in einem Gehäuse enthalten, das Öffnungen enthält, die einerseits mit dem Inneren des Verteilers in Verbindung stehen und andererseits in Abhängigkeit von der jeweiligen Stellung des Verschlußgliedes mit der Austrittsöffnung verbindbar sind.A device of the type mentioned at the outset (FR-A-2 407 751) is known for spraying out liquid binders serves. The device has a distributor which is connected to a binder source and contains outlet openings for the binder. The device also has a closure member which closes or releases the respective outlet opening and can be actuated by an actuating device. Here, the closure member is contained in a housing which contains openings which, on the one hand, are connected to the interior of the distributor and, on the other hand, can be connected to the outlet opening depending on the respective position of the closure member.

Das auszuspritzende flüssige Bindemittel, z.B. Bitumen, das auf die Oberfläche einer Straße od. dgl. aufzuspritzen ist, steht innerhalb des Verteilers unter einem relativ hohen Druck, z.B. in der Größenordnung von z.B. ca. 2 bis 2,5 bar. Beim Hindurchtritt des Bindemittels durch den Verteiler treten Druckverluste auf, die mit der Länge des zurückzulegenden Weges ansteigen. Druckverluste gegenüber dem normalen Betriebsdruck können relativ groß werden und sind nicht überschaubar, so daß sich beim Aufbringen des flüssigen Bindemittels meist Schwierigkeiten ergeben. Eine Erhöhung des Betriebsdruckes, um diesen Schwierigkeiten zu begegnen, kommt nicht in Betracht; denn das Bindemittel tritt schon unter dem Systemdruck im Inneren des Verteilers mit zu hohem Druck aus, und zwar nebelförmig, wodurch das Bindemittel verweht wird und sich darüber hinaus auch Sichtbeeinträchtigungen ergeben. Vorallem aber ergibt sich daraus eine unzuträgliche Umweltbelastung. Man hat deshalb schon den Spritzdruck reduzierende Einrichtungen in Form von Abdeckplatten mit kleineren Durchlaßöffnungen vorgeschlagen, die wie Blenden wirken. Diese Lösungen befriedigen jedoch nicht, z.B. deswegen nicht, weil dadurch der Spritzdruck und die Spritzmenge je Austrittsöffnung fest vorgegeben und nicht z.B. in Anpassung an das Straßenprofil bedarfsweise veränderbar sind. Bekanntlich hat man keinen gleichförmigen Verlauf über die Straßenbreite, sondern beispielsweise Spurrillen. Im Bereich der Spurrillen muß beim Ausspritzen des flüssigen Bindemittels weniger Medium ausgespritzt werden als in Nachbarbereichen, die ebenflächig verlaufen.The liquid binder to be sprayed out, for example bitumen, to be sprayed onto the surface of a road or the like is at a relatively high level within the distributor Pressure, for example in the order of about 2 to 2.5 bar. When the binder passes through the distributor, pressure losses occur which increase with the length of the distance to be covered. Pressure losses compared to normal operating pressure can be relatively large and cannot be manageable, so that difficulties usually arise when applying the liquid binder. An increase in the operating pressure to counter these difficulties is out of the question; because the binder already exits at too high a pressure inside the distributor under the system pressure, namely in the form of a fog, as a result of which the binder is blown away and there are also impaired visibility. Above all, however, this results in an unacceptable environmental impact. Devices for reducing the spray pressure have therefore already been proposed in the form of cover plates with smaller passage openings which act like diaphragms. However, these solutions are unsatisfactory, for example because the spray pressure and the spray amount per outlet opening are fixed and cannot be changed, for example, to adapt to the road profile. As is well known, you do not have a uniform course across the street width, but, for example, ruts. In the area of the ruts, when the liquid binder is sprayed out, less medium has to be sprayed out than in neighboring areas which run flat.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der im Oberbegriff des Anspruchs 1 genannten Art zu schaffen, die eine bedarfsweise Veränderung der Spritzmenge und/oder des Spritzdrucks je einzelner Spritzvorrichtung und damit für die gesamte Einrichtung eine veränderbare Querverteilung in Anpassung an die Querbeschaffenheit der zu bespritzenden Oberfläche, insbesondere Straße, ermöglicht.The invention has for its object to provide a device of the type mentioned in the preamble of claim 1, which requires a change in the spray quantity and / or the spray pressure per individual spray device and thus for the entire device a variable transverse distribution in adaptation to the transverse nature of the splashing surface, especially street.

Die Aufgabe ist bei einer Vorrichtung der eingangs genannten Art gemäß der Erfindung durch die Merkmale im Kennzeichnungsteil des Anspruchs 1 gelöst. Weitere vorteilhafte Erfindungsmerkmale dazu ergeben sich aus den Ansprüchen 2 bis 28.The object is achieved in a device of the type mentioned according to the invention by the features in the characterizing part of claim 1. Further advantageous features of the invention result from claims 2 to 28.

Gemäß der Erfindung ist somit bei jeder einzelnen Spritzvorrichtung einer Spritzeinrichtung entsprechend dem jeweiligen Bedarf der Spritzdruck und die Spritzmenge des aus der Austrittsöffnung auszuspritzenden Bindemittels steuerbar. Das Steuerglied jeder Vorrichtung wird hierzu im Steuergehäuse je nach dem gewünschten Bedarf an Spritzmenge und Spritzdruck in die jeweils zugeordnete Stellung verstellt, in der jeweils zugeordnete Steueröffnungen im Steuergehäuse gesperrt bzw. freigegeben werden. Auf diese Weise ist einfach und zuverlässig eine bedarfsweise Änderung des Spritzdruckes und der Spritzmenge je Spritzvorrichtung möglich, so daß man bei einer Spritzeinrichtung, die eine Vielzahl einzelner Spritzvorrichtungen genannter Art aufweist, eine dimensionierte Querverteilung des auszuspritzenden Bindemittels hinsichtlich Menge und Druck in Anpassung an die Querbeschaffenheit der zu bespritzenden Oberfläche, z.B. Straße, vornehmen kann. Man kann also insbesondere auch solche Bereiche, die Spurrillen enthalten, durch dortige Steuerung der Spritzvorrichtungen berücksichtigen, wobei diese Spritzvorrichtungen im Bereich der Spurrillen dann z.B. auf kleinere Spritzmengen eingestellt werden, entsprechend dem jeweiligen Bedarf und dem Straßenprofil. Durch die Erfindung ist in besonders einfacher Weise somit der Spritzdruck auf verschiedene Größen verstellbar und ebenso auch die Spritzmenge. Die Veränderung des Spritzdruckes und der Spritzmenge kann dabei digital, d.h. absatzweise, oder aber analog, d.h. kontinuierlich und stufenlos erfolgen.According to the invention, the spray pressure and the spray quantity of the binder to be sprayed out of the outlet opening can thus be controlled in each individual spraying device of a spraying device in accordance with the respective requirement. For this purpose, the control element of each device is adjusted in the control housing, depending on the required spray quantity and spray pressure, into the respectively assigned position, in which respectively assigned control openings in the control housing are blocked or released. In this way, the spray pressure and the spray quantity per spray device can be changed simply and reliably, so that with a spray device which has a large number of individual spray devices of the type mentioned, a dimensionally transverse distribution of the binder to be sprayed out in terms of quantity and pressure in adaptation to the transverse properties the surface to be sprayed, e.g. street. It is therefore possible in particular to take account of those areas which contain track grooves by controlling the spraying devices there, these spraying devices in the area of the track grooves then being set, for example, to smaller spray quantities, in accordance with the respective requirement and the road profile. By means of the invention, the spray pressure can thus be adjusted to different sizes in a particularly simple manner, as can the spray quantity. The change in the spray pressure and the spray quantity can take place digitally, ie batchwise, or analogously, ie continuously and continuously.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung.Further details and advantages of the invention emerge from the following description.

Der vollständige Wortlaut der Ansprüche ist vorstehend allein zur Vermeidung unnötiger Wiederholungen nicht wiedergegeben, sondern statt dessen lediglich durch Nennung der Anspruchsnummern darauf Bezug genommen, wodurch jedoch alle diese Anspruchsmerkmale als an dieser Stelle ausdrücklich und erfindungswesentlich offenbart zu gelten haben. Dabei sind alle in der vorstehenden und folgenden Beschreibung erwähnten Merkmale sowie auch die allein aus der Zeichnung entnehmbaren Merkmale weitere Bestandteile der Erfindung, auch wenn sie nicht besonders hervorgehoben und insbesondere nicht in den Ansprüchen erwähnt sind.The full wording of the claims is not reproduced above solely in order to avoid unnecessary repetition, but instead is referred to only by mentioning the claim numbers, whereby all these features of the claim are to be regarded as being explicitly disclosed here and essential to the invention. All of the features mentioned in the above and the following description, as well as the features that can only be taken from the drawing, are further components of the invention, even if they are not particularly emphasized and in particular are not mentioned in the claims.

Die Erfindung ist nachfolgend anhand von in den Zeichnungen gezeigten Ausführungsbeispielen näher erläutert. Es zeigen:

Fig. 1
eine schematische, teilweise geschnittene Seitenansicht eines Teils einer Vorrichtung zum Ausspritzen von flüssigem Bitumen gemäß einem ersten Ausführungsbeispiel,
Fig. 2
einen schematischen Schnitt entlang der Linie II - II in Fig. 1,
Fig. 3
eine schematische, teilweise geschnittene Seitenansicht eines Teils einer Vorrichtung zum Ausspritzen gemäß einem zweiten Ausführungsbeispiel.
The invention is explained in more detail below with reference to exemplary embodiments shown in the drawings. Show it:
Fig. 1
2 shows a schematic, partially sectioned side view of part of a device for spraying liquid bitumen according to a first exemplary embodiment,
Fig. 2
2 shows a schematic section along the line II-II in FIG. 1,
Fig. 3
is a schematic, partially sectioned side view of part of a device for spraying according to a second embodiment.

In Fig. 1 ist der besseren Übersicht wegen nur ein Teil einer Spritzeinrichtung 10 gezeigt, die zum Ausspritzen und Aufspritzen eines flüssigen Bindemittels, z.B. von Bitumen, auf Oberflächen dient, z.B. auf die Oberflächen von Straßen. Derartige Spritzeinrichtungen sind generell bekannt, wozu auf DE-U-89 15 041 verwiesen wird. Derartige Spritzeinrichtungen 10 werden z.B. an einen Lastkraftwagen gehängt und mit etwa konstanter Geschwindigkeit über die Straße gezogen. Die Spritzeinrichtung 10 weist einen oder mehrere Verteiler 11, insbesondere Spritzbalken, auf, die z.B. rohrförmig sind und deren Innenraum 12 über nicht sichtbare Stutzen mit dem flüssigen Bindemittel, insbesondere Bitumen, von einer nicht weiter gezeigten Quelle her gespeist wird, wobei das Bindemittel unter Druck zugeführt wird.In FIG. 1, for the sake of a better overview, only part of a spray device 10 is shown, which is used for spraying and spraying a liquid binder, for example bitumen, onto surfaces, for example onto the surfaces of streets. Such spray devices are generally known, for which reference is made to DE-U-89 15 041. Such spray devices 10 are, for example, hung on a truck and pulled across the road at an approximately constant speed. The spraying device 10 has one or more distributors 11, in particular spray bars, which are, for example, tubular and whose interior 12 is fed with the liquid binder, in particular bitumen, from a source (not shown) via invisible nozzles, the binder being under pressure is fed.

Die Spritzeinrichtung 10 weist einzelne Spritzvorrichtungen 13 auf, die entlang der Längserstreckung des Verteilers 11 in Abständen voneinander plaziert sind. Jede Spritzvorrichtung 13 ist als Spritzventil ausgebildet, das z.B. entweder offen ist und dann den Austritt des flüssigen Bindemittels ermöglicht oder statt dessen geschlossen ist.The spraying device 10 has individual spraying devices 13 which are placed at intervals from one another along the longitudinal extent of the distributor 11. Each spray device 13 is designed as a spray valve, which e.g. is either open and then allows the liquid binder to exit or is closed instead.

Jede Spritzvorrichtung 13 hat am Verteiler 11 eine Austrittsöffnung 14, die mittels eines Verschlußgliedes 16 verschließbar bzw. freigebbar ist. Am Verschlußglied 16 greift eine Betätigungsstange 17 an, die dazu koaxial ausgerichtet ist. Zur Spritzvorrichtung 13 gehört ferner ein druckmittelbetriebener Arbeitszylinder 18, der aus einem zylindrischen Gehäuse 19 mit Zylinderraum darin und einem darin befindlichen Kolben gebildet ist. Der Arbeitszylinder 18 ist koaxial zur Betätigungsstange 17 angeordnet und greift an letzterer zu deren Betätigung und damit zur Betätigung des Verschlußgliedes 16 an. Außerdem weist die Spritzvorrichtung eine dem Arbeitszylinder 18 zugeordnete, hier nicht weiter gezeigte Steuereinrichtung auf, die z.B. auf den Arbeitszylinder 18 oben aufgesetzt ist und mittels der zur Betätigung des Verschlußgliedes 16 eine der beidseitig des Kolbens des Arbeitszylinders 18 befindliche Kammer mit Druckmittel beaufschlagbar ist. Der Arbeitszylinder 18 bildet also eine Betätigungseinrichtung für die Betätigungsstange 17 und damit für das Verschlußglied 16.Each spray device 13 has an outlet opening 14 on the distributor 11, which can be closed or released by means of a closure member 16. An actuating rod 17 engages on the closure member 16 and is aligned coaxially therewith. The spray device 13 also includes a pressure medium-operated working cylinder 18, which is formed from a cylindrical housing 19 with a cylinder space therein and a piston located therein. The working cylinder 18 is arranged coaxially to the actuating rod 17 and engages the latter to actuate it and thus to actuate the closure member 16. In addition, the spraying device has a control device, which is associated with the working cylinder 18 and is not shown here, which is placed on top of the working cylinder 18, for example, and one of the means for actuating the closure member 16 Chamber located on both sides of the piston of the working cylinder 18 can be acted upon with pressure medium. The working cylinder 18 thus forms an actuating device for the actuating rod 17 and thus for the closure member 16.

Eine Besonderheit der Spritzvorrichtung 13 gemäß dem ersten Ausführungsbeispiel liegt darin, daß das Verschlußglied 16 als Steuerglied 19 ausgebildet und in einem besonderen Steuergehäuse 20 enthalten ist. Das Steuergehäuse 20 enthält vom Steuerglied 19 steuerbare Steueröffnungen 21 und 22, die einerseits mit dem Innenraum 12 des Verteilers 11 in Verbindung stehen und die andererseits in Abhängigkeit von der jeweiligen Stellung des Steuergliedes 19 mit der Austrittsöffnung 14 verbindbar sind. Das Steuerglied 19 ist als axial verschiebbarer Steuerkolben ausgebildet, der z.B. zylindrisch ist. Das Steuerglied 19 weist eine Ringnut 23 auf, die mit den die Ringnut begrenzenden Flanken Steuerkanten und mit den beidseitig daran anschließenden Umfangsflächen Steuerflächen 24 und 25 bildet, die die Steueröffnungen 21, 22 steuern.A special feature of the spray device 13 according to the first exemplary embodiment is that the closure member 16 is designed as a control member 19 and is contained in a special control housing 20. The control housing 20 contains control openings 21 and 22 which can be controlled by the control member 19 and which on the one hand are connected to the interior 12 of the distributor 11 and which on the other hand can be connected to the outlet opening 14 depending on the respective position of the control member 19. The control member 19 is designed as an axially displaceable control piston, which e.g. is cylindrical. The control member 19 has an annular groove 23 which forms control surfaces 24 and 25 with the flanks delimiting the annular groove and with the circumferential surfaces adjoining it on both sides, which control the control openings 21, 22.

Das Steuergehäuse 20 weist eine Hülse 26 auf, die in ihrer Wandung 27 in axialer Richtung in Abstand voneinander angeordnete Durchgangsöffnungen 28 und 29 aufweist, die die Steueröffnungen 21 bzw. 22 bilden. Diese Durchgangsöffnungen 28, 29 sind je nach Stellung des Steuergliedes 19 von letzterem, und zwar z.B. von dessen Steuerflächen 24, 25, überdeckt und verschlossen oder statt dessen freigebbar, nämlich dann, wenn die Ringnut 23 in Überdeckung mit der einen Durchgangsöffnung 28 oder der nächstfolgenden Durchgangsöffnung 29 steht. Ersichtlich haben die Steueröffnungen 21, 22, insbesondere Durchgangsöffnungen 28 bzw. 29, unterschiedlich groß bemessene Öffnungsquerschnitte. So ist der Öffnungsquerschnitt der Durchgangsöffnung 28 größer als derjenige der Durchgangsöffnung 29. Bei den Durchgangsöffnungen 28, 29 handelt es sich z.B. in einfacher Weise um Bohrungen, die somit einen unterschiedlich großen Durchmesser haben. Beim gezeigten ersten Ausführungsbeispiel ist die Anordnung so gewählt, daß vom Steuerglied 19 wahlweise entweder die Steueröffnung 21 mit dem größeren Öffnungsquerschnitt freigebbar ist, wobei die andere Steueröffnung 22 mittels der Steuerfläche 25 verschlossen bleibt, oder daß statt dessen die nächstfolgende Steueröffnung 22 mit kleinerem Öffnungsquerschnitt freigebbar ist, wobei dann die andere Steueröffnung 21 von der Steuerfläche 24 überdeckt und verschlossen ist.The control housing 20 has a sleeve 26 which in its wall 27 has through openings 28 and 29 which are spaced apart from one another in the axial direction and form the control openings 21 and 22, respectively. Depending on the position of the control member 19, these through openings 28, 29 are covered and closed by the latter, for example by its control surfaces 24, 25, or can be released instead, namely when the annular groove 23 is in overlap with one through opening 28 or the next one Through opening 29 is. As can be seen, the control openings 21, 22, in particular through openings 28 and 29, have differently sized opening cross sections. Thus, the opening cross section of the through opening 28 is larger than that of the through opening 29. In the Through openings 28, 29 are, for example, bores in a simple manner, which thus have different diameters. In the first exemplary embodiment shown, the arrangement is selected such that either the control opening 21 with the larger opening cross-section can be optionally released by the control member 19, the other control opening 22 remaining closed by means of the control surface 25, or that instead the next control opening 22 with a smaller opening cross-section can be released , in which case the other control opening 21 is covered and closed by the control surface 24.

Bei einem anderen, nicht gezeigten Ausführungsbeispiel kann natürlich die Anordnung statt dessen auch so getroffen sein, daß vom Steuerglied 19 wahlweise zunächst die eine Steueröffnung 21 und anschließend daran nach einem weiteren Verschiebeweg zusätzlich zur Steueröffnung 21 auch noch die nächstfolgende Steueröffnung 22 freigebbar ist, somit also hier keine "Oder-Schaltung" sondern statt dessen eine "Und-Schaltung" vorliegt.In another embodiment, not shown, of course, the arrangement can of course also be made such that the control member 19 can selectively first open the one control opening 21 and then, after a further displacement path, in addition to the control opening 21, the next following control opening 22 as well, thus here no "OR circuit" but an "AND circuit" instead.

Das Steuergehäuse 20 weist einen mit der Ringnut 23 des Steuergliedes 19 in permanenter Verbindung stehenden Raum 30 oder Kanal od. dgl. auf, der auch mit der Austrittsöffnung 14 in Verbindung bringbar ist. Der Raum 30 ist durch einen das Steuerglied 19 auf einer Umfangsseite mit radialem Abstand umgebenden Gehäusewandungsteil 31 des Steuergehäuses 20 gebildet. Letzterer verläuft auf der Seite des Steuergliedes 19, die demjenigen Gehäusewandungsteil vorzugsweise etwa diametral gegenüberliegt, in dem die Steueröffnungen 21, 22, insbesondere Durchgangsöffnungen 28, 29, enthalten sind und an dem das Steuerglied 19 mit seiner äußeren Umfangsfläche auf der Innenseite unter Überdeckung bzw. Freigabe der Steueröffnungen 21, 22 anliegt. Diese Anordnung ist in einfacher Weise z.B. dadurch erreicht, daß das Steuergehäuse 20 in bezug auf das Steuerglied 19 exzentrisch angeordnet ist.The control housing 20 has a space 30 or channel or the like which is in permanent communication with the annular groove 23 of the control member 19 and which can also be connected to the outlet opening 14. The space 30 is formed by a housing wall part 31 of the control housing 20 which surrounds the control member 19 on a circumferential side at a radial distance. The latter extends on the side of the control member 19, which is preferably approximately diametrically opposite that part of the housing wall in which the control openings 21, 22, in particular through openings 28, 29, are contained and on which the control member 19 with its outer peripheral surface on the inside is covered or Release of the control openings 21, 22 is present. This arrangement is achieved in a simple manner, for example, in that the control housing 20 with respect to the Control member 19 is arranged eccentrically.

Bei einem anderen, nicht gezeigten Ausführungsbeispiel ist der Raum, Kanal od. dgl., der die Verbindung zwischen der Ringnut 23 und der Austrittsöffnung 14 herstellt, aus einer inneren Längsnut z.B. innerhalb der inneren Umfangsfläche des Steuergehäuses 20 gebildet, wobei dann das Steuergehäuse 20 als zum Steuerglied 19 koaxiales Zylindergehäuse ausgebildet sein kann, innerhalb dem das Steuerglied 19 verschiebbar aufgenommen und geführt ist, wobei die äußere Umfangsfläche des Steuergliedes 19 dann mit der inneren Umfangsfläche des zylindrischen Steuergehäuses ringsum in Anlage- und Gleitberührung steht. Alternativ dazu kann bei einem anderen, nicht gezeigten Ausführungsbeispiel statt dessen oder zusätzlich dazu auch das Steuerglied 19 einen mit seiner Ringnut 23 in Verbindung stehenden Raum, Kanal od. dgl., z.B. eine Bohrung, eine äußere Längsnut od.dgl. aufweisen, wobei dieser Raum, Kanal od.dgl. dann die Ringnut 23 mit der Austrittsöffnung 14 in Freigabestellung verbindet.In another embodiment, not shown, the space, channel or the like, which establishes the connection between the annular groove 23 and the outlet opening 14, is made of an inner longitudinal groove e.g. formed within the inner peripheral surface of the control housing 20, in which case the control housing 20 can be designed as a cylinder housing coaxial with the control member 19, within which the control member 19 is slidably received and guided, the outer peripheral surface of the control member 19 then being connected to the inner peripheral surface of the cylindrical control housing all around in contact and sliding contact. Alternatively, in another exemplary embodiment, not shown, instead or in addition to this, the control member 19 can also have a space, channel or the like connected to its annular groove 23, e.g. a hole, an outer longitudinal groove or the like. have, this space, channel or the like. then connects the annular groove 23 to the outlet opening 14 in the release position.

Wie Fig. 1 zeigt, ist das Steuergehäuse 20 innerhalb des Verteilers 11 aufrechtstehend gehalten, z.B. mit einem Gewindeabsatz 32 in eine entsprechende Gewindebohrung 33 des Verteilers 11 eingeschraubt. Statt dessen kann analog dem DE-U-89 15 041 das Steuergehäuse 20 mit seinem Gewindeabsatz 32 in eine Zwischenhülse einschraubbar sein, die ihrerseits in einer Bohrung im Verteiler 11 gehalten ist. Wie Fig. 1 zeigt, enthält das Steuergehäuse 20 die zugeordnete Austrittsöffnung 14, die sich in einem mit dem Steuergehäuse 20 einstückigen Teil oder statt dessen in einem separaten, in das Steuergehäuse 20 einschraubbaren Teil befindet. Die Austrittsöffnung 14 ist dabei in axialem Abstand von der darüber befindlichen ersten Steueröffnung 21, insbesondere Durchgangsöffnung 28, angeordnet. Die Austrittsöffnung 14 sitzt koaxial zum Steuerglied 19.As shown in FIG. 1, the control housing 20 is held upright within the distributor 11, for example screwed into a corresponding threaded bore 33 of the distributor 11 with a threaded shoulder 32. Instead, analogously to DE-U-89 15 041, the control housing 20 with its threaded shoulder 32 can be screwed into an intermediate sleeve, which in turn is held in a bore in the distributor 11. As shown in FIG. 1, the control housing 20 contains the associated outlet opening 14, which is located in a part integral with the control housing 20 or instead in a separate part that can be screwed into the control housing 20. The outlet opening 14 is arranged at an axial distance from the first control opening 21 located above it, in particular through opening 28. The outlet opening 14 is located coaxially with the control member 19.

Es versteht sich, daß prinzipiell die Austrittsöffnung 14 permanent geöffnet sein kann und somit das Steuerglied 19 auch in der in Fig. 1 gezeigten Schließstellung, in der beide Steueröffnungen 21 und 22 verschlossen sind, mit seinem unteren Ende in Abstand oberhalb der Austrittsöffnung 14 endet, so daß ein dauernder Durchgang zwischen dem Raum 30 und der Austrittsöffnung 14 vorliegt.It goes without saying that in principle the outlet opening 14 can be permanently open and thus the control member 19 also ends with its lower end at a distance above the outlet opening 14 in the closed position shown in FIG. 1, in which both control openings 21 and 22 are closed, so that there is a continuous passage between the space 30 and the outlet opening 14.

Beim gezeigten Ausführungsbeispiel in Fig. 1 ist jedoch das Steuerglied 19 zusätzlich noch mit einem Schließkörper 34 versehen, der vorzugsweise dazu koaxial ausgerichtet ist. Mittels des Schließkörpers 34 ist die Austrittsöffnung 14 in der in Fig. 1 gezeigten Schließstellung des Steuergliedes 19 verschließbar. Beim Öffnen, d.h. Verschieben des Steuergliedes 19 in Fig. 1 nach oben, ist zusammen mit dieser Verschiebung der Schließkörper 34 von der Austrittsöffnung 14 unter Freigabe dieser abhebbar. Der Schließkörper 34 ist hier einstückiger Bestandteil des Steuergliedes 19. Statt dessen kann er auch als eigenständiges Element am Steuerglied 19 z.B. einstellbar angebracht sein.In the exemplary embodiment shown in FIG. 1, however, the control member 19 is additionally provided with a closing body 34, which is preferably aligned coaxially thereto. The outlet opening 14 can be closed by means of the closing body 34 in the closed position of the control member 19 shown in FIG. 1. When opening, i.e. Moving the control member 19 upward in FIG. 1, together with this displacement, the closing body 34 can be lifted off the outlet opening 14, thereby releasing it. The closing body 34 here is an integral part of the control member 19. Instead, it can also be used as an independent element on the control member 19, e.g. be adjustable.

Ersichtlich ist mittels des Steuergliedes 19, durch das die Steueröffnungen 21 und 22 steuerbar sind, sowohl die Spritzmenge als auch der Spritzdruck des im Inneren 12 des Verteilers 11 unter Druck befindlichen und auszuspritzenden Bindemittels steuerbar. Dies ergibt sich daraus, daß der Öffnungsquerschnitt der Steueröffnungen 21 und 22 unterschiedlich groß und dabei jeweils kleiner als derjenige der Austrittsöffnung 14 ist.It can be seen by means of the control element 19, through which the control openings 21 and 22 can be controlled, that both the spray quantity and the spray pressure of the binding agent which is under pressure in the interior 12 of the distributor 11 and can be sprayed out can be controlled. This results from the fact that the opening cross section of the control openings 21 and 22 is of different sizes and is in each case smaller than that of the outlet opening 14.

Der Arbeitszylinder 18 der beschriebenen Betätigungseinrichtung ist z.B. auf drei Stellungen des Steuergliedes 19 steuerbar. Die erste Stellung zeigt Fig. 1. Es handelt sich um die die Austrittsöffnung 14 mittels des Schließkörpers 34 verschließende Endstellung, in der durch die Steuerfläche 25 oberhalb der Ringnut 23 des Steuergliedes 19 zugleich beide Steueröffnungen 21 und 22 flächig überdeckt und verschlossen sind. Dadurch kann kein Bindemittel, das sich im Innenraum 12 unter Druck stehend befindet, durch die Steueröffnungen 21, 22 hindurch in den Raum 30 gelangen. Da als zusätzliche Sicherheit auch der Schließkörper 34 in der die Austrittsöffnung 14 verschließenden Stellung sitzt, kann selbst bei etwaigen geringen Leckströmen, sollten sie je vorkommen, dennoch kein Bindemittel über die Austrittsöffnung 14 austreten.The working cylinder 18 of the actuating device described can be controlled, for example, in three positions of the control member 19. The first position is shown in FIG. 1. It is the end position which closes the outlet opening 14 by means of the closing body 34, in which the two control openings 21 and 22 are covered and closed at the same time by the control surface 25 above the annular groove 23 of the control member 19. This means that no binding agent is under pressure in the interior 12, pass through the control openings 21, 22 into the space 30. Since the closing body 34 also sits in the position closing the outlet opening 14 as additional security, even if there are any small leakage currents, should they ever occur, no binding agent can nevertheless emerge via the outlet opening 14.

Wird für das Ausspritzen von Bindemittel aus dem Innenraum 12 des Verteilers 11 eine Spritzmenge pro Zeiteinheit benötigt, die z. B. 100 % einer vorgegebenen Durchsatzmenge beträgt, so wird der Arbeitszylinder 18 angesteuert, der dann über die Betätigungsstange 17 das Steuerglied 19 in Fig. 1 nach oben zieht, wobei der Schließkörper 34 die Austrittsöffnung 34 freigibt. Die Bewegung des Steuergliedes 19 erfolgt dabei in eine Betriebsstellung, in der die Ringnut 23 auf Höhe der Steueröffnung 21, insbesondere Durchgangsöffnung 28,steht und mit dieser Verbindung hat, während die andere Steueröffnung 22 von der Steuerfläche 25 verdeckt und somit verschlossen ist. In dieser zweiten Stellung, die der ersten Betriebsstellung entspricht, kann nun im Innenraum 12 unter Druck stehendes Bindemittel durch die offene Steueröffnung 21 hindurch in den Ringraum 23 und von diesem in den Raum 30 gelangen und von dort durch die Austrittsöffnung 14 ausgespritzt werden. Die Steueröffnung 21, insbesondere Durchgangsöffnung 28,stellt dabei eine Steuerblende dar, über die der im Innenraum 12 des Verteilers 11 herrschende relativ hohe Druck auf einen geringeren Druck reduziert wird, der dann in dem Raum 30 herrscht und dem Ausspritzdruck durch die Austrittsöffnung 14 entspricht.Is required for the spraying of binder from the interior 12 of the distributor 11, a spray amount per unit of time, the z. B. is 100% of a predetermined throughput quantity, the working cylinder 18 is actuated, which then pulls the control member 19 upward in FIG. 1 via the actuating rod 17, the closing body 34 opening the outlet opening 34. The movement of the control member 19 takes place in an operating position in which the annular groove 23 is at the level of the control opening 21, in particular through opening 28, and has this connection, while the other control opening 22 is covered by the control surface 25 and is therefore closed. In this second position, which corresponds to the first operating position, pressurized binder in the interior 12 can now pass through the open control opening 21 into the annular space 23 and from there into the space 30 and be sprayed out from there through the outlet opening 14. The control opening 21, in particular through opening 28, represents a control orifice via which the relatively high pressure prevailing in the interior 12 of the distributor 11 is reduced to a lower pressure which then prevails in the space 30 and corresponds to the ejection pressure through the outlet opening 14.

Wird statt dessen eine geringere Spritzmenge gewünscht, z. B. in der Größenordnung von 70 % derjenigen, die durch die Steueröffnung 21 vorgegeben werden kann, so wird mittels des Arbeitszylinders 18 das Steuerglied 19 in Fig. 1 noch weiter angehoben, soweit, bis die Ringnut 23 auf Höhe der Steueröffnung 22 steht, während die andere Steueröffnung 21 dann von der Steuerfläche 24 des Steuergliedes 19 überdeckt und somit geschlossen ist. Dann gelangt im Innenraum 12 unter Druck stehendes flüssiges Bindemittel durch die kleinere Steueröffnung 22 hindurch über die Ringnut 23 in den Raum 30 und durch die Austrittsöffnung 14. Aufgrund der kleineren Steueröffnung 21 im Verhältnis zur größeren Steueröffnung 22 ergibt sich eine weitere Reduzierung des Spritzdruckes und außerdem der Spritzmenge. Soll statt dessen das Ausspritzen gestoppt werden, so wird das Steuerglied 19 mittels des Arbeitszylinders 18 wieder in die in Fig. 1 gezeigte Schließstellung verstellt.If a smaller spray quantity is desired instead, e.g. B. in the order of 70% of those that can be predetermined through the control opening 21, the control member 19 in FIG. 1 is raised even further by means of the working cylinder 18 until the annular groove 23 is at the level of the control opening 22 while the other control opening 21 then from the control surface 24 of the control member 19th covered and thus closed. Then, in the interior 12, liquid binder under pressure passes through the smaller control opening 22 through the annular groove 23 into the space 30 and through the outlet opening 14. Because of the smaller control opening 21 in relation to the larger control opening 22, there is a further reduction in the injection pressure and also the spray volume. If the spraying is to be stopped instead, the control member 19 is adjusted again into the closed position shown in FIG. 1 by means of the working cylinder 18.

Ersichtlich gestattet somit die Spritzvorrichtung 13 auf einfache Weise eine Steuerung der Spritzmenge und des Spritzdrucks des auszuspritzenden Bindemittels.Obviously, the spraying device 13 thus allows the spray quantity and the spray pressure of the binder to be sprayed out to be controlled in a simple manner.

Das Steuergehäuse 20 ist mit einer Filtervorrichtung 35, z. B. einem Lochblech, einem Maschengitter od.dgl., versehen, die vor dem mit dem Verteiler 11 in Verbindung stehenden Einlaß der Steueröffnungen 21, 22 angeordnet ist und etwaige im Innenraum 12 befindliche Schmutzpartikel abfiltert. Die Filtereinrichtung 35 ist auswechselbar, so daß sie gereinigt werden kann. Fig. 1 zeigt, daß in den Austrittsöffnungen 14 des Verteilers 11 jeweils Spritzdüsen 36 angeordnet sind, die jeweils z. B. in das Steuergehäuse 20 von unten her eingeschraubt sind.The control housing 20 is provided with a filter device 35, e.g. B. a perforated plate, a mesh or the like. Provided, which is arranged in front of the inlet 11 connected to the control openings 21, 22 and filters any dirt particles located in the interior 12. The filter device 35 is replaceable so that it can be cleaned. Fig. 1 shows that in each case spray nozzles 36 are arranged in the outlet openings 14 of the distributor 11, each of which, for. B. are screwed into the control housing 20 from below.

Das Steuergehäuse 20 ist gegen ein anderes Steuergehäuse mit davon verschieden großen und/oder verschieden angeordneten Steueröffnungen austauschbar, so daß man schnell den jeweiligen Bedürfnissen hinsichtlich variierender Spritzmenge und variierenden Spritzdruckes Rechnung tragen kann.The control housing 20 is interchangeable with another control housing with differently sized and / or differently arranged control openings, so that one can quickly take into account the respective needs with regard to varying spray quantity and varying spray pressure.

Bei einem nicht gezeigten Ausführungsbeispiel weist das Steuergehäuse 20 zumindest im Bereich der Steueröffnungen 21, 22 eine darüber befindliche verstellbare und/oder auswechselbare Blende auf, z. B. eine drehverstellbare und/oder axial verschiebbare Hülse, die ihrerseits Steueröffnungen enthält und über die die Steueröffnungen 21, 22 des Steuergehäuses 20 steuerbar und somit veränderbar sind. Die Hülse bildet somit eine Blende für das Steuergehäuse, insbesondere deren Steueröffnungen 21, 22, so daß mittels dieser Blende wiederum eine Verstellung der Spritzmenge und des Spritzdruckes entsprechend den Bedürfnissen möglich ist. Dabei versteht es sich, daß eine solche Blende, z. B. Hülse, mit zumindest einem Verstellteil aus dem Innenraum 12 des Verteilers 11 nach außen geführt sein kann, so daß man die Hülse von außen verstellen und damit die Arbeitswerte hinsichtlich Spritzmenge und Spritzdruck des Steuergehäuses 20 hinsichtlich der Steueröffnungen 21, 22 verändern kann.In one embodiment, not shown, the control housing 20 has, at least in the area of the control openings 21, 22, an adjustable and / or replaceable diaphragm located above it, e.g. B. a rotationally adjustable and / or axially displaceable sleeve, which in turn contains control openings and through which the control openings 21, 22nd of the control housing 20 are controllable and thus changeable. The sleeve thus forms an orifice for the control housing, in particular its control openings 21, 22, so that this orifice in turn enables the spray quantity and the spray pressure to be adjusted in accordance with the requirements. It is understood that such an aperture, for. B. sleeve, with at least one adjustment part from the interior 12 of the distributor 11 can be guided to the outside, so that the sleeve can be adjusted from the outside and thus the work values with regard to the spray quantity and spray pressure of the control housing 20 with respect to the control openings 21, 22 can be changed.

Auch wenn beim beschriebenen ersten Ausführungsbeispiel als vom Steuerglied 19 steuerbare Steueröffnungen 21, 22 solche vorgesehen sind, die in Abstand voneinander angeordnet sind, versteht es sich gleichwohl, daß statt dessen als Steueröffnungen z. B. auch Kanäle, Langlöcher, Schlitze od. dgl. innerhalb der Wandung 27 des Steuergehäuses 20 enthalten sein können. So kann z. B. eine Steueröffnung z. B. durch ein etwa achsparalleles Langloch in der Wandung 27 gebildet sein, das je nach Axialstellung des Steuergliedes 19 mehr oder weniger von dessen Steuerflächen überdeckt bzw. freigegeben wird. Auch in Axialrichtung sich verbreiternde bzw. sich verengende, langlochartige Durchbrüche in der Wandung 27 sind möglich. Statt dessen können auch Schlitze in der Wandung 27 des Steuergehäuses 20 enthalten sein, die z. B. in Umfangsrichtung oder einer Schraubenlinie folgend oder in ähnlicher Weise schräg verlaufen. Auch eine Steuerung von Längsschlitzen und/oder Umfangsschlitzen durch Drehbetätigung des Steuergliedes 19 statt einer Axialverschiebung liegt im Rahmen der Erfindung.Even if in the first exemplary embodiment described as control openings 21, 22 which are controllable by the control element 19 are provided which are arranged at a distance from one another, it goes without saying that instead of control openings z. B. channels, slots, slots or the like. Can be included within the wall 27 of the control housing 20. So z. B. a control opening z. B. be formed by an approximately axially parallel elongated hole in the wall 27, which depending on the axial position of the control member 19 is more or less covered or released by its control surfaces. Widening or narrowing, slot-like openings in the wall 27 are also possible in the axial direction. Instead, slots can also be included in the wall 27 of the control housing 20, the z. B. following in the circumferential direction or a helix or in a similar manner obliquely. A control of longitudinal slots and / or circumferential slots by turning the control member 19 instead of an axial displacement is also within the scope of the invention.

Bei dem in Fig. 3 gezeigten zweiten Ausführungsbeispiel sind für die Teile, die dem ersten Ausführungsbeispiel entsprechen, um 100 größere Bezugszeichen verwendet, so daß dadurch zu Vermeidung von Wiederholungen auf die Beschreibung des ersten Ausführungsbeispieles Bezug genommen ist.In the second exemplary embodiment shown in FIG. 3, 100 larger reference numerals are used for the parts corresponding to the first exemplary embodiment, so that reference is made to the description of the first exemplary embodiment in order to avoid repetition.

Beim zweiten Ausführungsbeispiel in Fig. 3 ist das Steuergehäuse 120 zylindrisch ausgebildet. Das zylindrische Steuerglied 119 ist innerhalb des zylindrischen Steuergehäuses 120 verschiebbar aufgenommen und geführt, wobei die äußere Umfangsfläche des Steuergliedes 119 mit der inneren Umfangsfläche des zylindrischen Steuergehäuses 120 ringsum in Anlage- und Gleitberührung steht. In der Wandung 127 des Steuergehäuses 120 sind z. B. auf einer Seite mehrere in Abstand übereinander angeordnete Steueröffnungen 121, 122 enthalten, die unterschiedliche oder gleich große Öffnungsquerschnitte haben können. Das Steuerglied 119 ist durchgehend zylindrisch, wobei an dessem unteren Ende z. B. lösbar und ein besonderer Schließkörper 134 angebracht ist. Die Steueröffnungen 121,122 werden von der Umfangsfläche des Steuergliedes 119 bzw. von dessen unterer Endkante 137 als Steuerfläche gesteuert. Zur Freigabe zunächst der unteren Steueröffnung 121 und Verbindung mit dem Raum 130 und mit der Austrittsöffnung 114 wird das Steuerglied 119 soweit in Fig. 3 nach oben verschoben, bis dessen untere Endkante 137 sich oberhalb der Steueröffnung 121 jedoch noch unterhalb der nächsten Steueröffnung 122 befindet. Damit ist über die Umfangsfläche des Steuergliedes 119 die Steueröffnung 122 überdeckt und verschlossen, während die darunter befindliche Steueröffnung 121 von der Umfangsfläche des Steuergliedes 119 freigegeben und geöffnet ist. Das flüssige Bitumen kann nun durch diese Steueröffnung 121 in den Raum 130 gelangen und über die Austrittsöffnung 114 ausgespritzt werden, und zwar mit einer Spritzmenge und einem Spritzdruck, der durch den Öffnungsquerschnitt der Steueröffnung 121 vorgegeben ist.In the second embodiment in Fig. 3, the control housing 120 is cylindrical. The cylindrical control member 119 is slidably received and guided within the cylindrical control housing 120, the outer circumferential surface of the control member 119 being in abutting and sliding contact with the inner circumferential surface of the cylindrical control housing 120 all around. In the wall 127 of the control housing 120 z. B. on one side contain a plurality of control openings 121, 122 arranged one above the other, which can have different or equal opening cross sections. The control member 119 is cylindrical throughout, with z. B. releasable and a special closing body 134 is attached. The control openings 121, 122 are controlled by the peripheral surface of the control member 119 or by its lower end edge 137 as a control surface. In order to first release the lower control opening 121 and to connect it to the space 130 and to the outlet opening 114, the control member 119 is shifted upward in FIG. 3 until its lower end edge 137 is above the control opening 121 but still below the next control opening 122. The control opening 122 is thus covered and closed over the peripheral surface of the control member 119, while the control opening 121 located underneath is opened and opened by the peripheral surface of the control member 119. The liquid bitumen can now pass through this control opening 121 into the space 130 and be sprayed out via the outlet opening 114, specifically with an injection quantity and an injection pressure which is predetermined by the opening cross section of the control opening 121.

Soll die Spritzmenge und der Spritzdruck verändert werden, so wird das Steuerglied 119 in Fig. 3 weiter nach oben verschoben, und zwar soweit, bis dessen untere Endkante 137 sich oberhalb der Steueröffnung 122 befindet. In dieser Stellung sind beide Steueröffnungen 121 und 122 freigegeben, so daß flüssiges Bindemittel nun über beide Steueröffnungen 121, 122 in den Raum 130 gelangen und ausgespritzt werden kann. Dadurch, daß nun die Öffnungsquerschnitte beider Steueröffnungen 121, 122 sich addieren, ergibt sich eine größere Spritzmenge und eine weniger starke Druckreduzierung.If the spray quantity and the spray pressure are to be changed, the control member 119 in FIG. 3 is shifted further upwards, namely until its lower end edge 137 is above the control opening 122. In this position, both control openings 121 and 122 are released, so that liquid binder can now enter the space 130 via both control openings 121, 122 and can be sprayed out. Because now the opening cross-sections of both Control openings 121, 122 add up, there is a larger spray quantity and a less severe pressure reduction.

Als weitere Variante ist in Fig. 3 links als Steueröffnung ein Schlitz 138 gezeigt, dort in der Wandung des Steuergehäuses 120 enthalten ist. Diese Variante erlaubt eine stetige Verschiebung des Steuerglieds 119 in Fig. 3 nach oben, so daß stetig ein größerer Querschnitt des Schlitzes 138 für den Durchlaß des Bindemittels freigegeben wird. Diese Variante ermöglicht somit eine stufenlose Steuerung der Spritzmenge und des Spritzdruckes durch stufenloses Verschiebung des Steuergliedes 119 relativ zum Schlitz 138. Es versteht sich, daß bei einem anderen, nicht gezeigten Ausführungsbeispiel der Schlitz 138, der hier z. B. etwa achsparallel angeordnet ist, in Umfangsrichtung oder längs einer Schraubenlinie oder ähnlich geneigt verläuft, so daß sich bei Axialverschiebung des Steuerglieds eine noch feinfühligere Verstellung der Spritzmenge und des Spritzdruckes bei relativ kleinem Verstellweg des Steuergliedes 119 vornehmen läßt.As a further variant, a slot 138 is shown on the left in FIG. 3 as a control opening, where it is contained in the wall of the control housing 120. This variant allows a constant displacement of the control member 119 in FIG. 3 upwards, so that a larger cross section of the slot 138 is continuously released for the passage of the binder. This variant thus enables a stepless control of the spray quantity and the spray pressure by stepless displacement of the control member 119 relative to the slot 138. It is understood that in another embodiment, not shown, the slot 138, which here z. B. is arranged approximately axially parallel, in the circumferential direction or along a helix or similarly inclined, so that with axial displacement of the control member an even more sensitive adjustment of the spray quantity and the injection pressure can be made with a relatively small adjustment path of the control member 119.

Claims (28)

  1. Device for spraying a fluid bonding agent, especially bitumen, with a distributor (11) connected to a bonding agent source, in particular a spray bar containing exit openings (14) for the bonding agent and a closing member (16) sealing or opening the respective exit opening (14), which is activated by an activating mechanism (18), whereby the closing member (16) is contained in a casing which has openings connected on one side to the inside (12) of the distributor (11) and connectable on the other side to the exit opening independently of the actual position of the closing member (16),
    characterized in that,
    the closing member (16) has the form of a control element (19; 119) and is contained in a control casing (20; 120) having control openings (21, 22; 121, 122; 138) which are controlled by the control element (19, 119).
  2. Device according to claim 1,
    characterized in that
    the control element (19; 119) has the form of an axially displaceable or rotationally adjustable control piston.
  3. Device according to claim 1 or 2,
    characterized in that
    the control casing (20; 120) has a sleeve (26) containing through openings (28, 29) as control openings (21, 22; 121, 122; 138) in its wall (27) arranged or passing through at a distance in a peripheral direction and/or in an axial direction, which are covered and sealed by the control element (19; 119) or can be opened depending on the position of the latter.
  4. Device according to claim 3,
    characterized in that
    the control openings (21, 22; 121, 122; 138) are large in size with respect to the cross section of their opening.
  5. Device according to one of claims 1 to 4,
    characterized in that
    selectively one control opening (21, 22; 121, 122; 138) or additionally or instead of this a second control opening spaced following at a distance therefrom can be opened or all control openings can be closed by the control element (19; 119).
  6. Device according to one of claims 1 to 5,
    characterized in that
    the control element (19; 119) has control surfaces (23, 24, 25; 137) controlling the control openings (21, 22, 121, 122; 138).
  7. Device according to claim 6,
    characterized in that
    the end of the control element (119) is formed as a control surface together with the end edge (137) there present.
  8. Device according to one of claims 1 to 7,
    characterized in that
    the control element (19) has an annular groove (23) which forms control edges and control surfaces (24, 25) on both sides thereof.
  9. Device according to one of claims 1 to 8,
    characterized in that
    the control element (19; 119), in particular the control piston is cylindrical in form.
  10. Device according to one of claims 1 to 9,
    characterized in that
    the control casing (120), in particular the sleeve is cylindrical in form.
  11. Device according to one of claims 1 to 10,
    characterized in that
    the cylindrical control element (19; 119) is displaceably received and guided inside the cylindrical control casing (120), in which the outer peripheral surface of the control element (19; 119) is in all round contact with the inner peripheral surface of the control casing (120) in location and sliding.
  12. Device according to one of claims 1 to 11,
    characterized in that
    the control casing (20) has a cavity (30) or channel linked to the annular groove (23) of the control element (19) which is also connected to the exit opening (14) or is connectable thereto.
  13. Device according to claim 12,
    characterized in that
    the cavity (30) or channel is formed by an inner longitudinal groove inside the inner peripheral surface of the control casing (20; 120).
  14. Device according to claim 12,
    characterized in that
    the cavity (30) or channel is formed by a casing wall part (31) of the control casing (20) surrounding the control element (19) on one peripheral side at a radial distance.
  15. Device according to claim 14,
    characterized in that
    the casing wall part (31) surrounding the control element (19) at a radial distance is on the side of the control element (19) which is roughly diametrically opposite to the casing wall part containing the control openings (21, 22) and against which the control element (19) bears on the inside when the control openings (21, 22) are covered or opened.
  16. Device according to claim 14 or 15,
    characterized in that
    the control casing (20) is arranged excentrically in relation to the control element (19).
  17. Device according to one of claims 8 to 11,
    characterized in that
    the control element (19) has a cavity or channel, e.g. a bore, an outer longitudinal groove or the like, connected to its annular groove (23) which is also connected to the exit opening (14).
  18. Device according to claims 1 to 17,
    characterized in that
    the control casing (20; 120) is supported upright inside the distributor (11).
  19. Device according to one of claims 1 to 18,
    characterized in that
    the control casing (20; 120) contains the allocated exit opening (14; 114).
  20. Device according to claim 19,
    characterized in that
    the exit opening (14; 114) is arranged spaced axially from the first control opening (21; 121).
  21. Device according to claim 19 or 20,
    characterized in that
    the exit opening (14; 114) is arranged coaxially to the control element (19; 119).
  22. Device according to one of claims 1 to 21,
    characterized in that
    the control element (19; 119) has a closing body (34; 134) coaxial thereto, by means of which the exit opening (14; 114) can be closed in the closed position of the control element (19; 119) and can be lifted on opening the exit opening (14; 114).
  23. Device according to one of claims 1 to 22,
    characterized in that
    the activating mechanism of the control element (19; 119) has an activating rod (17) engaging the latter and a working cylinder (18) driven by pressure means which is arranged coaxially to the activating rod (17) and engages therewith.
  24. Device according to one of claims 1 to 23,
    characterized in that
    the working cylinder (18) can be controlled at three positions of the control element (19; 119) of which the first position is the end position closing the exit opening (14; 114) and the second position is a operating position opening the exit opening (14; 114) and a control opening (21; 121) and the third position is an operating position opening the exit opening (14; 114) and either only the following second control opening (22) or instead of this the first control opening (21; 121) and additionally the following second control opening (22; 122).
  25. Device according to one of claims 1 to 24,
    characterized in that
    a filter device (35), e.g. a perforated sheet, a mesh filter or the like is arranged in front of the inlet of the control openings (21, 22; 121, 122; 138) connected to the distributor (11).
  26. Device according to one of claims 1 to 25,
    characterized in that
    spray nozzles (36) are arranged at the exit openings (14; 114) of the distributor (11), in particular e.g. are screwed into the control casing (20; 120).
  27. Device according to one of claims 1 to 26,
    characterized in that
    the control casing (20; 120) can be substituted by a different control casing with variously large and/or differently arranged control openings.
  28. Device according to one of claims 1 to 27,
    characterized in that
    the control casing (20; 120) has in the area of the control openings (21, 22; 121, 122; 138) at least one adjustable and/or exchangeable screen, e.g. a rotationally adjustable and/or axially displaceable sleeve positioned over it, which in turn contains control openings.
EP91119672A 1991-01-25 1991-11-19 Device to spray a fluid bonding agent, especially bitumen Expired - Lifetime EP0496052B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9100824U 1991-01-25
DE9100824U DE9100824U1 (en) 1991-01-25 1991-01-25 Device for spraying liquid binding agent, in particular bitumen

Publications (2)

Publication Number Publication Date
EP0496052A1 EP0496052A1 (en) 1992-07-29
EP0496052B1 true EP0496052B1 (en) 1995-04-05

Family

ID=6863652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119672A Expired - Lifetime EP0496052B1 (en) 1991-01-25 1991-11-19 Device to spray a fluid bonding agent, especially bitumen

Country Status (3)

Country Link
EP (1) EP0496052B1 (en)
DE (2) DE9100824U1 (en)
ES (1) ES2070398T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993020349A1 (en) * 1992-04-01 1993-10-14 Siemens Automotive L.P. Injector valve seat with recirculation trap
DE29508916U1 (en) * 1995-06-02 1996-10-02 hhs Leimauftrags-Systeme GmbH, 40885 Ratingen Dosing valve
JP3247849B2 (en) * 1997-02-24 2002-01-21 株式会社新潟鉄工所 Emulsion spraying apparatus and emulsion spraying method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326470A (en) * 1965-04-27 1967-06-20 Babcock & Wilcox Co Liquid atomizer
FR2407751A1 (en) * 1977-11-03 1979-06-01 Acmar Spray head for road surfacing or agricultural use - uses taper end of double acting cylinder rod acting against floating seat to shut off flow
US4378080A (en) * 1979-07-18 1983-03-29 Nolex Corporation Fluid velocity attenuating nozzle
EP0105311A1 (en) * 1982-04-02 1984-04-18 Eur-Control Usa Inc. Improved desuperheater
DE8915041U1 (en) * 1989-12-22 1990-03-01 Robert Breining Maschinen- & Fahrzeugbau GmbH u. Co, 7064 Remshalden Spray device, in particular spray valve

Also Published As

Publication number Publication date
ES2070398T3 (en) 1995-06-01
DE59105117D1 (en) 1995-05-11
EP0496052A1 (en) 1992-07-29
DE9100824U1 (en) 1991-04-18

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