EP0496052B1 - Vorrichtung zum Ausspritzen von flüssigem Bindemittel, insbesondere Bitumen - Google Patents
Vorrichtung zum Ausspritzen von flüssigem Bindemittel, insbesondere Bitumen Download PDFInfo
- 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
- Authority
- 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
Links
Images
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
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.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
- Catching Or Destruction (AREA)
- Nozzles (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9100824U | 1991-01-25 | ||
DE9100824U DE9100824U1 (de) | 1991-01-25 | 1991-01-25 | Vorrichtung zum Ausspritzen von flüssigem Bindemittel, insbesondere Bitumen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0496052A1 EP0496052A1 (de) | 1992-07-29 |
EP0496052B1 true EP0496052B1 (de) | 1995-04-05 |
Family
ID=6863652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91119672A Expired - Lifetime EP0496052B1 (de) | 1991-01-25 | 1991-11-19 | Vorrichtung zum Ausspritzen von flüssigem Bindemittel, insbesondere Bitumen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0496052B1 (es) |
DE (2) | DE9100824U1 (es) |
ES (1) | ES2070398T3 (es) |
Families Citing this family (3)
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 (de) * | 1995-06-02 | 1996-10-02 | hhs Leimauftrags-Systeme GmbH, 40885 Ratingen | Dosierventil |
JP3247849B2 (ja) * | 1997-02-24 | 2002-01-21 | 株式会社新潟鉄工所 | 乳剤散布装置及び乳剤散布方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3326470A (en) * | 1965-04-27 | 1967-06-20 | Babcock & Wilcox Co | Liquid atomizer |
FR2407751A1 (fr) * | 1977-11-03 | 1979-06-01 | Acmar | Distributeur diffuseur de liants routiers ou de tous autres liquides |
US4378080A (en) * | 1979-07-18 | 1983-03-29 | Nolex Corporation | Fluid velocity attenuating nozzle |
WO1983003365A1 (en) * | 1982-04-02 | 1983-10-13 | Eur Control Usa Inc | Improved desuperheater |
DE8915041U1 (de) * | 1989-12-22 | 1990-03-01 | Robert Breining Maschinen- & Fahrzeugbau GmbH u. Co, 7064 Remshalden | Spritzvorrichtung, insbesondere Spritzventil |
-
1991
- 1991-01-25 DE DE9100824U patent/DE9100824U1/de not_active Expired - Lifetime
- 1991-11-19 DE DE59105117T patent/DE59105117D1/de not_active Expired - Lifetime
- 1991-11-19 ES ES91119672T patent/ES2070398T3/es not_active Expired - Fee Related
- 1991-11-19 EP EP91119672A patent/EP0496052B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59105117D1 (de) | 1995-05-11 |
EP0496052A1 (de) | 1992-07-29 |
DE9100824U1 (de) | 1991-04-18 |
ES2070398T3 (es) | 1995-06-01 |
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