EP0675231A1 - Vorrichtung und Methode für streuen von aufgeschlämmtes Salz - Google Patents

Vorrichtung und Methode für streuen von aufgeschlämmtes Salz Download PDF

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Publication number
EP0675231A1
EP0675231A1 EP95850067A EP95850067A EP0675231A1 EP 0675231 A1 EP0675231 A1 EP 0675231A1 EP 95850067 A EP95850067 A EP 95850067A EP 95850067 A EP95850067 A EP 95850067A EP 0675231 A1 EP0675231 A1 EP 0675231A1
Authority
EP
European Patent Office
Prior art keywords
salt
rotors
water
tube
fans
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
Application number
EP95850067A
Other languages
English (en)
French (fr)
Other versions
EP0675231B1 (de
Inventor
Christer Friggeraker
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.)
Friggerakers Verkstader AB
Original Assignee
Friggerakers Verkstader AB
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 Friggerakers Verkstader AB filed Critical Friggerakers Verkstader AB
Publication of EP0675231A1 publication Critical patent/EP0675231A1/de
Application granted granted Critical
Publication of EP0675231B1 publication Critical patent/EP0675231B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 present invention relates to a method for spreading of salt slurry and a device for making such slurry.
  • Salt in various conditions is spread on the road lanes in order to dissolve ice and prevent skidding.
  • the salt can be in the form of solid or a more or less coarse-grained powder or dissolved or slurried in water. Saturated solutions of salt are only used on special occasions and use of dry salt or salt in slurries is more common. Salt slurries are generally more efficient than dry salt as it penetrates the surface faster and not like dry salt i.e. may be blown away from the road.
  • Salt slurries primarily means salt substantially comprising sodium chloride and/or other substances which are included in the designation road salt and which are mixed with an amount of water which is less than what is required to make all of the salt become dissolved.
  • the present invention relates to a new method for spreading of salt slurry.
  • the invention also concerns a device for use by the method for producing such slurry whereby it is produced in immediate connection with the spreading.
  • Figure 1 shows a complete equipment for producing and spreading of salt slurry using the method and device according to the invention.
  • Figure 2 shows part of the device of figure 1 more in detail.
  • Figures 3 and 4 show the device of the invention from the side and from above.
  • FIGS 5 and 6 show another embodiment of the invention from the side and from above.
  • the device shown in figure 1 comprises a container 12 for salt and a tank 13 for water or solution of salt.
  • Water and salt is delivered to a device enclosed in a tube 4, wherein the slurry is produced.
  • the tube 4 is essentially vertical which in practice means that it deviates not more than 25 o from a vertical line as by greater deviations there are problems with the conveyance of material through the tube.
  • the slurry falls down onto a spreader disc 15 from which it is spread over the road.
  • the complete device when used is intended to be placead on a suitable transportation vehicle.
  • Salt and water are supplied to the tube 4 from the top by a feeding screw 11 for salt and a tube 9 for water having a spreader disc 10 at its end. Thereafter, salt and water fall down through the tube to a device comprising two rotors made as fans 1 and 2.
  • fans is a device which has several blades or wings 1 a-d, 2 a-d mounted to a shaft 2. The blades extend from the shaft all the way outwards close to the inside of the tube.
  • the denomination fan aims at the appearance of the device.
  • the rotating fan shall not cause a flow of air in the direction of the shaft 2.
  • the fans are driven by a motor 5, suitably a hydraulic motor, and are directed opposite each other, i.e. so arranged that the flow of air which results from the rotation is nil or very small.
  • the fans are mounted onto a common shaft 2.
  • the blades of the fans are immovably mounted to the shaft and thus always rotate at the same speed and at the same direction.
  • the blades of the fans comprise flat surfaces which are somewhat oblique relative to the shaft and arranged so that the upper fan 1 alone would cause a flow of air directed in opposite direction to the flow of air from the lower fan 2.
  • the fans rotate at high speed which means that the salt particles hit the blades of the fans and are broken thereby.
  • the speed of rotation is based upon a desire to obtain a specific maximum particle size. It has also been found that the water shall be supplied before the fans and pass through them together with the salt as problems will otherwise occur with particles of salt that adhere to and form lumps on the blades of the fans.
  • the so obtained slurry falls via a funnel or duct 6 onto a conventional spreader including a spreader disc 15 with several blades 7.
  • the spreader disc is mounted onto a shaft 8 which is driven by a motor that can be controlled to the desired rotational speed.
  • the fan device can be made in many different ways.
  • the device as shown in figures 3 and 4 has two sets of fan blades 1, 2 on a common shaft.
  • the blades of the fans may also be mounted onto two different concentric shafts which rotate in opposite directions where all of the blades are angled in the same direction.
  • Other possibilities are e.g. to have only one set of fan blades which can be flat with discs parallel to the shaft or having V-shape with the point of the V backwards in direction of rotation. It is essential that there is no or very little vertical air flow generated by the fan.
  • the speed of the rotors varies depending upon the other design features. However, there is a certain lowest speed at the outer ends of the blades close to the tube walls which is required and at a tube diameter of 200 mm the speed of rotation shall be not less than 1500 rpm, preferably about 2000 rpm.
  • FIG. 5 Another embodiment of the invention is shown in figures 5 and 6, wherein the blades of the fans have been substituted for by chain links 15, 16, 17, 18. In many cases this design further reduces the formation of lumps and adhering layers on the rotors. Nor do the chain links cause a vertical flow of air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Seasonings (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP95850067A 1994-03-28 1995-03-27 Verfahren und Vorrichtung zum Streuen von angefeuchtetem Salz Expired - Lifetime EP0675231B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9401054A SE9401054L (sv) 1994-03-28 1994-03-28 Sätt och anordning vid spridning av saltuppslamning
SE9401054 1994-03-28

Publications (2)

Publication Number Publication Date
EP0675231A1 true EP0675231A1 (de) 1995-10-04
EP0675231B1 EP0675231B1 (de) 1999-03-03

Family

ID=20393463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95850067A Expired - Lifetime EP0675231B1 (de) 1994-03-28 1995-03-27 Verfahren und Vorrichtung zum Streuen von angefeuchtetem Salz

Country Status (7)

Country Link
EP (1) EP0675231B1 (de)
AT (1) ATE177165T1 (de)
DE (1) DE69507973T2 (de)
DK (1) DK0675231T3 (de)
FI (1) FI109928B (de)
NO (1) NO304195B1 (de)
SE (1) SE9401054L (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10058073C2 (de) * 2000-11-23 2002-11-07 Schmidt Holding Gmbh Streugerät
DE20114202U1 (de) * 2001-08-30 2002-02-07 Lindner, Anton, 83131 Nußdorf Sprühkasten
DE10328913B3 (de) * 2003-06-26 2005-03-24 Schmidt Holding Gmbh Streugerät

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420451A (en) * 1964-08-25 1969-01-07 Anton Kahlbacher Device for spreading moist material on the ground
US4442979A (en) * 1980-09-19 1984-04-17 Kuepper Willy Spreader vehicle for solid and liquid thawing materials
DE3420694A1 (de) * 1984-06-02 1985-12-05 Max Pietsch KG GmbH & Co, 3014 Laatzen Streufahrzeug fuer den winterdienst
EP0427995A1 (de) * 1989-11-13 1991-05-22 Küpper-Weisser GmbH Streuvorrichtung zum Ausstreuen angefeuchteter Granulate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420451A (en) * 1964-08-25 1969-01-07 Anton Kahlbacher Device for spreading moist material on the ground
US4442979A (en) * 1980-09-19 1984-04-17 Kuepper Willy Spreader vehicle for solid and liquid thawing materials
DE3420694A1 (de) * 1984-06-02 1985-12-05 Max Pietsch KG GmbH & Co, 3014 Laatzen Streufahrzeug fuer den winterdienst
EP0427995A1 (de) * 1989-11-13 1991-05-22 Küpper-Weisser GmbH Streuvorrichtung zum Ausstreuen angefeuchteter Granulate

Also Published As

Publication number Publication date
FI109928B (fi) 2002-10-31
SE9401054D0 (sv) 1994-03-28
FI951437A0 (fi) 1995-03-27
FI951437A (fi) 1995-09-29
DE69507973T2 (de) 1999-09-16
SE501524C2 (sv) 1995-03-06
NO951177L (no) 1995-09-29
NO951177D0 (no) 1995-03-27
NO304195B1 (no) 1998-11-09
DK0675231T3 (da) 1999-10-04
SE9401054L (sv) 1995-03-06
EP0675231B1 (de) 1999-03-03
DE69507973D1 (de) 1999-04-08
ATE177165T1 (de) 1999-03-15

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