EP1280609A1 - Mischdüse mit verschiebbarer drossel und sprüheinheit - Google Patents
Mischdüse mit verschiebbarer drossel und sprüheinheitInfo
- Publication number
- EP1280609A1 EP1280609A1 EP01936015A EP01936015A EP1280609A1 EP 1280609 A1 EP1280609 A1 EP 1280609A1 EP 01936015 A EP01936015 A EP 01936015A EP 01936015 A EP01936015 A EP 01936015A EP 1280609 A1 EP1280609 A1 EP 1280609A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- mixing
- throttle body
- spray
- nozzles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
- B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
- B05B7/0425—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid without any source of compressed gas, e.g. the air being sucked by the pressurised liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
- B01F23/2323—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits
- B01F23/23231—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles by circulating the flow in guiding constructions or conduits being at least partially immersed in the liquid, e.g. in a closed circuit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
- B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
- B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
- B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
- B05B15/658—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits the spraying apparatus or its outlet axis being perpendicular to the flow conduit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/08—Fountains
- B05B17/085—Fountains designed to produce sheets or curtains of liquid, e.g. water walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
Definitions
- the invention relates to a mixing nozzle for fluid media, in particular water-air mixtures, with a liquid nozzle which opens into the interior of an outer nozzle body which has a longitudinally tapering zone at a distance from the liquid nozzle, within which a throttle body for swirling the fluid mixture is arranged.
- the invention further relates to a spray unit which is supplied with a fluid medium via a common supply line by means of a single pump.
- Mixing nozzles of the aforementioned type which are also referred to as foam jet nozzles, generate water fountains, several of these nozzles, which are combined to form a spray unit, used in so-called driving practice centers to simulate suddenly occurring variable obstacles lying transversely to the direction of travel.
- the water is supplied via the liquid nozzle by means of a pump and mixes with the air flowing in radially, this water-air mixture being swirled by a throttle body, so that an opaque fountain is formed as a result of the water jet being enriched with air bubbles.
- the width of the water hazard can only be graded in segments of around 1 m.
- the distance of the throttle body to the liquid nozzle outlet is fixed, so that only a constant obstacle height that cannot be changed during operation can be generated in accordance with the pump output or the water pressure that can be applied. If several mixing nozzles are arranged next to one another on a single distributor pipe, it is disadvantageous that even because of the pressure drop in the distributor pipe, water fountains of the same height cannot be generated. The height of the water fountain is namely inevitably larger in the mixing nozzles, which are arranged closest to the common pump.
- the liquid supply of these mixing nozzles should be closable as far as possible in order to prevent the ingress of dirt.
- the mixing nozzle according to claim 1 is proposed, which according to the invention is characterized in that the outlet of the liquid nozzle is designed as a valve seat for the throttle body which can be displaced longitudinally axially via a spindle.
- the throttle body serves here not only for swirling air-water mixtures, but also because of its longitudinal axial displaceability as a closure element and adjustable throttle element. So depending on the longitudinal axial position of the throttle body to the liquid nozzle outlet a more or less swirled liquid or. Air-water flow can be set.
- the longitudinal axial adjustability of the throttle body also allows the fluid flow rate to be finely regulated.
- the throttle body is preferably moved longitudinally axially by means of an electric motor.
- the drive spindle of the electric motor is connected to a non-rotatable sleeve, which is connected to the throttle body with the interposition of an elastic coupling via a connecting shaft.
- the elastic coupling prevents forces, in particular those which act on the throttle body in the longitudinal axial direction, from being transmitted to the drive spindle of the electric motor without damping.
- the damping generated by the clutch thus serves to protect the electric motor and increase the service life of this motor.
- a measuring sensor is connected to the electric motor, which provides information about the spindle rotation already made, which is directly proportional to the longitudinal axial displacement of the throttle body.
- the mixing nozzle has particular advantages when it is combined with a number of other nozzles to form a spray unit, which uses a single pump to convey a fluid medium a common supply line is supplied.
- the geometric shape of the spray unit can in principle be selected as desired, but the shape of a spray bar is preferably selected, on which several nozzles are arranged side by side in a row, which according to a further embodiment of the invention can be individually controlled or regulated.
- the spray bar can have a square tube, on or in which the mixing nozzle can be arranged in any number.
- each mixing nozzle can namely be regulated separately, so that a pressure drop can be compensated in a corresponding manner by changing the position of the throttle body, so that fountains of the same height can be set, for example. It is also possible to regulate the respective water-air-mixture fountain height per mixing nozzle so that a "water curtain" with an undulating or arbitrarily curved upper edge can be generated.
- any street width can be covered become. Since only a central, single pump located outside the supply line is required, its power supply is accordingly considerably simpler, but in particular it is to be made safer.
- Each mixing nozzle can be controlled separately, which also includes the possibility of opening only a part of the nozzles and closing the rest. Obstacles of any width can thus be created at different locations relative to the total width of the road.
- each nozzle that is possible according to the invention creates the advantage of simulating an obstacle that is variable both in terms of location and design. If you use a control with which nozzles are opened and closed one after the other, moving obstacles can also be simulated, to which the test subjects should react on corresponding auto test routes. Such simulations are important, for example, to simulate the movement of a child suddenly walking across the street.
- 1 is a conventional system of several spray units arranged side by side
- Fig. 2 shows a spray unit with a supply pump
- 5 shows a spray unit with several mixing nozzles according to the present invention
- 6 shows a cross section through a further mixing nozzle according to the invention
- Fig. 8 is a cross-sectional view of the spray unit according to
- channels 10 are arranged in a street, in which, according to the prior art, several spray units 11 are provided, which serve to simulate obstacles lying transversely to the direction of travel by means of water fountains.
- spray units 11 are required to cover the street width, each having six mixing nozzles in the case shown.
- Each of the individual spray units 11 is supplied with water via a pump 12.
- three spray units 11 lying next to one another are actuated in order to generate a water supply 13 from individual water fountains which is intended to represent an obstacle width b and an obstacle height h.
- spray units in the form of spray bars with a width of approximately 1 m and having five to six mixing nozzles are used regularly.
- each spray unit 11 thus covers a partial width a, so that several spray units and supply units required for this purpose are required to cover an entire street width B (see FIG. 1).
- the basic structure of a mixing nozzle 16 can be seen in FIG. 3.
- the water delivered via the outlet of a liquid nozzle 17 mixes with the radially inflowing air to form an air-water mixture which is swirled by the throttle body 18 and is ejected in the direction of arrow 19 (upward).
- the throttle body 18 is of spherical design and lies at a distance from the outlet of the liquid nozzle 12.
- manual adjustments are possible at most, and, if provided at all, only after opening the nozzle body. It is obvious that dirt, stones, leaves or similar contaminants can flow into the channels 10, which can in part penetrate into the lines 15 and 14 up to the pump and interfere with their operation.
- the outlet of the liquid nozzle is designed as a valve seat for the throttle body which can be displaced longitudinally axially via a spindle, which is explained in more detail below on the basis of exemplary embodiments.
- FIG. 4 shows a mixing nozzle 20 according to the invention, several of which are integrated in a square tube 21.
- Each of these mixing nozzles has a throttle body 1 which is adjustable axially axially and is conical on the side facing the liquid nozzle 2, so that the liquid nozzle 2 can be closed by means of the throttle body 1, the outlet of which is correspondingly designed as a valve seat for the conical throttle body part.
- the longitudinal axial adjustment of the throttle body 1 is possible by means of the connecting shaft 3, which with an elastic coupling 4 with a counter Twist secured sleeve 5 is connected to an internal thread.
- the sleeve 5 is coupled to the drive spindle 6 of the electric motor 7, by the rotation of which, depending on the direction of rotation, the sleeve 5 is moved forward or backward in accordance with the thread pitch.
- the motor 7 is equipped with an encoder 8.
- An adapter 9 is used to connect the power supply and the control lines.
- the water under pressure in the interior of the square tubes 21 passes through openings 22 provided in the interior 23 of the liquid nozzle to the outlet thereof, where it is mixed with the sucked-in air (see arrow 24) and is expelled via the mixing nozzle outlet 25.
- the flow rate and the pressure of the water-air mixture and thus also the achievable jet height of the mixing nozzle 20 can be varied.
- FIG. 5 shows the already mentioned square tube 21 with 48 mixing nozzles 20, which are arranged equidistant from one another.
- the square tube 21 extends as a spray bar essentially over the entire width B of the street or the trough 10 in which the spray bar is arranged.
- the square tube 21 is supplied with water via a single pump 27. Due to the separate controllability of each individual mixing nozzle, any obstacle widths c or obstacle heights d can be generated, as is shown in principle in FIG. 5.
- the water wall generated there from individual water jets 28, which are shown in dashed lines, can continue at any point and can also be generated for motion simulation.
- mixing nozzles 20 which are not intended to emit a water jet are closed by lowering the throttle body 1 onto the liquid nozzle outlet 2, which is designed as a corresponding valve seat.
- the mixing nozzle 29 shown in FIG. 6 is constructed similarly to the mixing nozzle according to FIG. 4, so that the same parts have been given the same reference numerals. However, this mixing nozzle has the following new features:
- the base 30 is designed in a conical shape so that water can drain off completely or the system can be completely emptied.
- a slot 31 is provided for the guide bush 32 and a coupling 33 with a driver 34.
- the throttle body 35 is spherical and in a closed position, i.e. shown lying on the valve seat.
- a cross-shaped guide plate 36 is provided at the nozzle outlet, which in connection with the spherical closure body results in an improved spray pattern.
- FIG. 7 shows a spray bar module 37 which has a width B of approximately 2 m in length and which is equipped with eight mixing nozzles 29 according to FIG. 6, which are arranged at an equidistant distance from one another.
- the existing pressure relief valve is numbered 38 and the control electronics 39.
- an adjustable suspension 40 of the beam 37 is also provided, with which an adaptation to the gradient of the road can be brought about.
- a frame 42 on which the spray bar 37 is suspended serves this purpose.
- the spray bar 37 is provided on the outside with a seal 43 which is fastened to a flange 44 and embedded in a recess in a concrete structure 45 which is shielded at the upper edge by a cover plate 41.
- the cover plate 41 which has been removed in the area 43 according to FIG. 9, covers the recess in the concrete plant 45 except for a narrow slot below which the mixing nozzles 29 (or 20) according to the invention are located.
- the advantage of the mixing nozzle or the spray unit according to the invention is immediately clear from a comparison with FIG. 1: While it is only possible to produce graduated obstacle widths by means of mixing nozzles 16 or spray units 11 known according to the prior art, the artificial obstacle widths can be adjusted using the Spray unit according to FIG. 5 or 7 to 9 can be set in finer stages. Since an individual regulation or control of the individual mixing nozzles is also possible during the fountain-like operation, the obstacles can be varied in the desired manner both in height and in width as well as with regard to the location and the course of time when the water pressure is present.
- the present invention also encompasses those embodiments in which no linear spray bar, but differently shaped spray units are used. These can be formed in a plane, for example in an S or Z shape, or also in space as a spiral, which means that fountains or similar water features can be individually controlled using only a single pump.
- the spray bar or nozzles can be set so that they spray only approx. 10 to 20 cm high, so that the spray bars embedded in a concrete plant can also be used to irrigate the road, for example to test aquaplaning. Behavior.
- An entire system can be assembled in a modular manner from a plurality of spray bars 37 arranged next to one another, for example in variations to a multiple of a width of 2 m, i.e. 4 m, 6 m, 8 m etc. road sections can be provided with a spray bar arrangement.
- the individual spray bars can be connected, for example, by a flange to form an overall bar.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nozzles (AREA)
- Special Spraying Apparatus (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10022073A DE10022073A1 (de) | 2000-05-06 | 2000-05-06 | Mischdüse und Sprüheinheit |
| DE10022073 | 2000-05-06 | ||
| PCT/DE2001/001642 WO2001085354A1 (de) | 2000-05-06 | 2001-04-28 | Mischdüse mit verschiebbarer drossel und sprüheinheit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1280609A1 true EP1280609A1 (de) | 2003-02-05 |
| EP1280609B1 EP1280609B1 (de) | 2004-01-02 |
Family
ID=7640988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01936015A Expired - Lifetime EP1280609B1 (de) | 2000-05-06 | 2001-04-28 | Mischdüse mit verschiebbarer drossel und sprüheinheit |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1280609B1 (de) |
| AT (1) | ATE257039T1 (de) |
| DE (2) | DE10022073A1 (de) |
| WO (1) | WO2001085354A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10247763A1 (de) | 2002-10-14 | 2004-06-03 | Robert Bosch Gmbh | Zerstäuberdüse |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1643967A (en) * | 1923-04-12 | 1927-10-04 | Sta Kleen Burner Company | Low-pressure oil burner |
| BE439980A (de) * | 1938-05-28 | |||
| US2259011A (en) * | 1939-05-24 | 1941-10-14 | William F Doyle | Atomizer for liquid fuels |
| US4836453A (en) * | 1988-02-22 | 1989-06-06 | Outboard Marine Corporation | Fuel injector with continuous air flow |
| DE4440666A1 (de) * | 1994-11-04 | 1996-05-09 | Bbj Servis Ggmbh Fuer Jugendhi | Zerstäubungsvorrichtung |
| DE29700463U1 (de) * | 1997-01-04 | 1997-05-22 | Gustav Schlick GmbH & Co, 96253 Untersiemau | Zerstäuber-Düsen-Anordnung |
-
2000
- 2000-05-06 DE DE10022073A patent/DE10022073A1/de not_active Withdrawn
-
2001
- 2001-04-28 WO PCT/DE2001/001642 patent/WO2001085354A1/de not_active Ceased
- 2001-04-28 EP EP01936015A patent/EP1280609B1/de not_active Expired - Lifetime
- 2001-04-28 DE DE50101270T patent/DE50101270D1/de not_active Expired - Lifetime
- 2001-04-28 AT AT01936015T patent/ATE257039T1/de not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0185354A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001085354A1 (de) | 2001-11-15 |
| DE50101270D1 (de) | 2004-02-05 |
| ATE257039T1 (de) | 2004-01-15 |
| DE10022073A1 (de) | 2001-11-08 |
| EP1280609B1 (de) | 2004-01-02 |
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