WO2005118960A1 - Dispositif d'epandage et dispositif d'humidification de la matiere d'epandage pour ce dernier - Google Patents

Dispositif d'epandage et dispositif d'humidification de la matiere d'epandage pour ce dernier Download PDF

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Publication number
WO2005118960A1
WO2005118960A1 PCT/EP2004/005784 EP2004005784W WO2005118960A1 WO 2005118960 A1 WO2005118960 A1 WO 2005118960A1 EP 2004005784 W EP2004005784 W EP 2004005784W WO 2005118960 A1 WO2005118960 A1 WO 2005118960A1
Authority
WO
WIPO (PCT)
Prior art keywords
openings
passage
hollow chamber
spreading
nozzle
Prior art date
Application number
PCT/EP2004/005784
Other languages
German (de)
English (en)
Inventor
Richard-Peter Seidl
Reinhold Otto Dankwart
Karl-Rudolf Schmidt
Original Assignee
Küpper-Weisser GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Küpper-Weisser GmbH filed Critical Küpper-Weisser GmbH
Priority to PCT/EP2004/005784 priority Critical patent/WO2005118960A1/fr
Publication of WO2005118960A1 publication Critical patent/WO2005118960A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H10/00—Improving gripping of ice-bound or other slippery traffic surfaces, e.g. using gritting or thawing materials ; Roadside storage of gritting or solid thawing materials; Permanently installed devices for applying gritting or thawing materials; Mobile apparatus specially adapted for treating wintry roads by applying liquid, semi-liquid or granular materials
    • E01H10/007—Mobile apparatus specially adapted for preparing or applying liquid or semi-liquid thawing material or spreading granular material on wintry roads

Definitions

  • the invention relates to a spreading device and in particular to a device for moistening spreading material for the spreading device.
  • a spreading device and in particular to a device for moistening spreading material for the spreading device.
  • the invention is described below in connection with the distribution of road salt in winter service use, it is not limited to this use.
  • Other types of spreading material which are mixed with moisture for the purpose of spreading, can advantageously be spread using the invention explained below.
  • Spreading salt to be spread is usually moistened before it is spread. It is assumed that when the de-icing salt is moistened, the thawing action of the salt begins more quickly and the flight properties of the de-icing salt are positively influenced. However, moistening the road salt long before spreading can lead to clumping of the road salt in the storage container, which would make spreading much more difficult. The moistening therefore takes place essentially only at the moment of the spreading process.
  • the de-icing salt and the brine used to moisten the de-icing salt are carried in separate containers on a winter service vehicle and are only mixed together at the time of the actual spreading, for example by deliberately feeding the two components separately to a rotating spreading disc in a limited area.
  • the brine is supplied by means of an overflow container at a central point of the spreading plate, while the road salt is directed against a baffle plate, from which it strikes the spreading plate with a radial component.
  • the salt and brine are mixed on the spreading disc.
  • the object of the present invention is therefore to show possibilities of how better wetting of the spreading material can be achieved.
  • the device according to the invention has a passage for the spreading material, to which the liquid for moistening the spreading material is supplied simultaneously from several sides.
  • openings in particular nozzles, are arranged around the passage in this, or in the wall thereof, which are connected to a liquid reservoir via at least one feed line and are supplied with the dampening liquid by the latter.
  • the liquid supplied via the feed line then flows through the openings or nozzles into the passage and mixes with it the litter st off flowing through the passage. In this way, uniform wetting of the spreading material can be achieved.
  • the device according to the invention is comparable to an annular nozzle.
  • the term “ring nozzle” is therefore also used below.
  • the spreading material is usually supplied from a spreading material container, a downpipe or a chute through which the spreading material is fed to the spreading plate following gravity.
  • the ring nozzle can advantageously be provided at any point between the spreading plate and the upper feed opening of the downpipe or the slide.
  • the downpipe does not necessarily have to be vertical, but can be wholly or partially inclined and form a slide.
  • An advantageous embodiment of the ring nozzle has at least one hollow chamber which surrounds the passage between the openings or nozzles and the liquid feed line. The liquid is then fed into the hollow chamber and can be distributed in the hollow chamber around the passage so that it flows through all openings or nozzles simultaneously and with the same pressure into the passage.
  • the liquid preferably flows into the passage in the radial direction, so that the individual jet streams meet one another in the center of the hollow chamber with sufficient jet pressure and the liquid is atomized and / or swirled accordingly.
  • This effect is at a maximum if two nozzles are arranged diametrically opposite one another, since the Liquid jets then meet vertically.
  • the radial alignment of the nozzles offers the advantage that the amount of scattering material is penetrated into the inside of the liquid as soon as it comes into contact with the liquid.
  • a particularly simple design provides that the openings or nozzles are designed as holes in a wall of the passage or in a wall of the hollow chamber surrounding the passage.
  • the jet width then essentially depends on the opening diameter, the number of openings over the circumference of the passage and the height of the liquid column in the hollow chamber.
  • the hollow chamber can also be pressurized, so that the jet width does not depend on the liquid column but on the pressure applied to the liquid from the outside.
  • a be ⁇ ferred embodiment provides the invention provides a grommet-like, extractragende in the passage hi ⁇ protuberance of the nozzle openings.
  • a plurality of groups of openings or nozzles are preferably arranged distributed around the passage and each form a nozzle ring.
  • the nozzle rings can be spaced apart in the direction of the spreading material. be standing, that is to be arranged one above the other, and / or can differ from one another in that the nozzles of one nozzle ring have a different diameter than the nozzles of another nozzle ring.
  • the spreading material flowing through the passage can be effectively and uniformly moistened by a suitable choice of the height distance and the nozzle diameter.
  • the diameter of the nozzles of the lowest nozzle ring is smaller than the diameter of the nozzles of one or more nozzle rings lying above it. Because of the smaller passage openings, the liquid level in the lower part of the hollow chamber initially rises relatively quickly, so that even with small spreading amounts and correspondingly small amounts of brine, a sufficiently high pressure is built up to inject the brine into the center of the ring nozzle. In particular, it is prevented that the brine only runs down the ring wall.
  • the liquid is preferably fed to the hollow chamber via two or more supply connection points arranged uniformly around the circumference of the hollow chamber, so that the hollow chamber fills with liquid as uniformly as possible and the liquid accordingly emerges from all nozzles of a nozzle ring with approximately the same jet pressure.
  • the supply connection points are preferably placed in such a way that the supplied liquid does not impinge directly on the nozzle outlet openings but preferably between the nozzles. This serves for the favorable distribution of the liquid within the ring, which is considered to be optimal if the liquid is introduced into the hollow chamber in a radial direction via the supply connection points, so that it impinges perpendicularly on the opposite hollow chamber wall between the nozzle openings provided there.
  • a baffle plate can be provided in front of the supply connection points.
  • FIG. 1 schematically shows a spreading device for winter service vehicles with an integrated spreading material moistening device according to an embodiment of the invention
  • FIG. 2 shows a scattering device moistening device according to an embodiment of the invention enlarged in further detail
  • Figure 3 shows the grit moistening device of Figure 2 in plan view.
  • the side view of a scattering device is shown schematically in cross section in FIG.
  • the spreading material is fed from a storage container (not shown) by means of a suitable conveyor, for example a conveyor belt or a screw conveyor, through a feed channel 1 to the upper end 2 of a down pipe 3.
  • a suitable conveyor for example a conveyor belt or a screw conveyor
  • the spreading material emerges and falls on a spreading material distributor in the form of a spreading plate 6 rotating about an axis of rotation 5, from which the spreading material is thrown off approximately in the horizontal direction by centrifugal force.
  • the downpipe 3 is telescopic in order to be able to adapt the device to different spreading vehicles.
  • the inclination of the downpipe can be greater or less than that shown in FIG. 1.
  • the use of a continuously vertical downpipe is not completely ruled out, although the slipping effect of a downpipe which is inclined at least in the lower part facilitates a precise feeding of the spreading material onto the spreading plate 6.
  • the moistening device can also be arranged under the lower end 4 of the downpipe 3 or at a location within the downpipe 3.
  • the moistening device 8 has a passage 12 delimited by a wall 13. It preferably comprises an annular hollow chamber 9, into which liquid or brine is introduced in the radial direction via two opposite feed lines 10. The brine then passes through nozzles 11 out of the hollow chamber 9 into the passage 7 .12 formed in this embodiment by the wall 13 of the annular hollow chamber in the direction of the single arrows.
  • the openings 11 in the wall 13 of the passage 12 for introducing the liquid into the passage 12, or the preferred nozzles, are formed by holes in the inner housing wall 13 of the hollow chamber 9.
  • the nozzle openings 11 are distributed at regular intervals around the inner housing wall 13 and in several planes. Each group of nozzles lying in one plane forms a nozzle ring.
  • the passage 12 shown in Figure 1 has three such superimposed nozzle rings, each with 8 nozzles per nozzle ring.
  • the flow pressure with which the liquid, in particular brine, is forced out of the hollow chamber 9 through the openings 11 essentially depends on the liquid column prevailing in the hollow chamber 9, which in turn depends on the amount of liquid supplied through the feed lines 10.
  • the nozzles 11 of the lower nozzle ring level inject approximately the same amount into the passage 12 as the nozzles of the nozzle ring levels above, the nozzles 11 of the lower nozzle ring level have a correspondingly smaller diameter, as a result of which the throttling effect of these nozzles increases.
  • the nozzles 11 of the nozzle rings shown in FIG. 1 lie vertically one above the other.
  • the nozzle rings could also be offset from one another by a certain angle relative to the direction of the scattering material passage for the purpose of more uniform moistening of the nozzle scattering material.
  • the moistening device 8 shown in FIG. 1 has three nozzle rings lying one above the other. Instead, however, only one or two or possibly more than three nozzle rings can also be provided.
  • a moistening device equipped with three nozzle rings and a hollow chamber 9 is shown in further detail in FIG. 2.
  • the hollow chamber 9 is in turn formed by two concentric hollow cylinders which are closed on both sides by cover rings 14, 15.
  • three nozzle rings were produced in a simple manner by means of a pulling tool, of which only the nozzles 11 shown in the illustration are shown, which protrude into the passage 12 like a spout.
  • the direction of flow of the scattering material through the passage 12 is indicated by a large arrow.
  • the nozzles 11 are oriented radially to the direction of flow of the scattering material, and two nozzles 11 of each nozzle ring are arranged diametrically opposite one another, so that the nozzles 11 occurring brine jets in the center of the passage 12 meet approximately perpendicularly.
  • FIG. 3 shows the moistening device 8 in a top view. Only two nozzle rings are shown in FIG. 3, which are offset from one another such that, when viewed from above, each nozzle of one nozzle ring lies exactly between two nozzles of the other nozzle ring. For better illustration of the different position of the nozzle rings, the two nozzle rings are shown differently in FIG. 3 and the brine jets emerging from the respective nozzles, namely once in solid lines and another time in broken lines.
  • the particular advantage of the radially oriented nozzle arrangement that points vertically towards one another is that a maximum swirling of the injected brine is achieved.
  • the nozzle rings in FIG. 3 each have eight nozzles evenly spaced from one another. Of course, more or fewer nozzles can be distributed around the circumference of the passage. However, with eight nozzles distributed over the circumference, a relatively uniform moistening of the spreading material could be achieved, in particular with a passage width of about 145 mm. The passage should not exceed a width of 200 mm and not less than 100 mm.
  • the nozzles 11 of the lower nozzle ring have a smaller passage diameter than the nozzles 11 of the upper nozzle ring.
  • Diameters between 1.5 mm and 10 mm are generally suitable. Good results have been obtained if the diameter of the nozzles of the upper nozzle ring was approximately twice as large as the diameter of the lower nozzle ring, in particular a diameter ratio of 6 mm to 3 mm. The diameter of the nozzles in between Nozzle ring does not necessarily have to be between these two values. Good results were also achieved, for example, if the nozzles of the middle nozzle ring had the same diameter of 6 mm as the nozzles of the upper nozzle ring. A distance between the nozzle ring center planes between 10 mm and 50 mm, in particular 15 mm, has proven to be suitable.
  • the liquid is fed to the passage 12 through two feed lines 10 in the radial direction, the two feed lines 10 being diametrically opposite one another.
  • further feed lines can also be provided, which are preferably distributed uniformly over the circumference of the passage 12.
  • the connection points of the feed lines 10 to the hollow chamber 9 of the moistening device 8 are chosen so that the supplied liquid splashes against the inner housing wall 13 of the hollow chamber 9 between two nozzles 11, so that it can be distributed evenly in the hollow chamber 9 and not immediately by one the nozzle emerges again.
  • the liquid is usually pumped into the hollow chamber 9 at a pressure of 2 bar and a delivery volume between 0 and 100 liters / min, but arrives there essentially without pressure. As already described, the liquid pressure in the hollow chamber 9 is determined solely by the prevailing liquid level.
  • the exemplary embodiment explained with reference to FIGS. 1 to 3 merely represents a suitable and particularly inexpensive variant for implementing the inventive idea.
  • the cross section of the passage 12 need not be circular.
  • it can also have a square or rectangular or oval cross section.
  • the wall 13 of the passage 12 can also have a constriction, so that the passage 12 is also nozzle-shaped.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Nozzles (AREA)

Abstract

L'invention concerne un dispositif d'épandage destiné à des véhicules pour service d'hiver, présentant, afin d'améliorer l'humidification du sel à épandre, une buse annulaire (8) placée de préférence sur une extrémité supérieure (2) d'un tuyau de descente (3) menant à un plateau d'épandage (6). Cette buse annulaire (8) présente des ouvertures (11) qui sont réparties de manière uniforme à sa périphérie et par l'intermédiaire desquelles la matière d'épandage traversant un passage central (12) de la buse annulaire (8) est humidifiée, radialement de l'extérieur, au moyen d'une solution saline.
PCT/EP2004/005784 2004-05-28 2004-05-28 Dispositif d'epandage et dispositif d'humidification de la matiere d'epandage pour ce dernier WO2005118960A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/005784 WO2005118960A1 (fr) 2004-05-28 2004-05-28 Dispositif d'epandage et dispositif d'humidification de la matiere d'epandage pour ce dernier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/005784 WO2005118960A1 (fr) 2004-05-28 2004-05-28 Dispositif d'epandage et dispositif d'humidification de la matiere d'epandage pour ce dernier

Publications (1)

Publication Number Publication Date
WO2005118960A1 true WO2005118960A1 (fr) 2005-12-15

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1107749A (en) * 1965-04-12 1968-03-27 Kahlbacher Anton Device for spraying roadways
DE2656371A1 (de) * 1975-12-15 1977-06-16 Anton Kahlbacher Vorrichtung zum verteilen von, die griffigkeit von verkehrsflaechen erhoehendem material
DE3937675C2 (fr) 1989-11-13 1992-03-05 Kuepper-Weisser Gmbh, 7715 Braeunlingen, De
US5419654A (en) * 1992-09-25 1995-05-30 Kleiger; Scott P. Vehicle for road repair and the like
US5931393A (en) * 1992-04-10 1999-08-03 Iboco, Inc. Salt-sand spreader with liquid injector
DE10007926A1 (de) 2000-02-21 2001-09-06 Kuepper Weisser Gmbh Streuvorrichtung mit einem Zwischenbehälter zum Ausbringen von flüssigem Streugut

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1107749A (en) * 1965-04-12 1968-03-27 Kahlbacher Anton Device for spraying roadways
DE2656371A1 (de) * 1975-12-15 1977-06-16 Anton Kahlbacher Vorrichtung zum verteilen von, die griffigkeit von verkehrsflaechen erhoehendem material
DE3937675C2 (fr) 1989-11-13 1992-03-05 Kuepper-Weisser Gmbh, 7715 Braeunlingen, De
US5931393A (en) * 1992-04-10 1999-08-03 Iboco, Inc. Salt-sand spreader with liquid injector
US5419654A (en) * 1992-09-25 1995-05-30 Kleiger; Scott P. Vehicle for road repair and the like
DE10007926A1 (de) 2000-02-21 2001-09-06 Kuepper Weisser Gmbh Streuvorrichtung mit einem Zwischenbehälter zum Ausbringen von flüssigem Streugut

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