JP2007107376A - Winter service spraying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spraying apparatus used for a winter service spraying vehicle for spraying spreading grit such as road surface spreading salt moistened with brine (a ductile solution). <P>SOLUTION: This winter service spreading apparatus rotatingly spreads a mixture of the spreading grit S such as the spreading salt and the brine F by a spreading disk 6. The spreading grit S or the mixture is supplied in the discharge direction by a down pipe 3 and a mouth piece 4 downstream of the down pipe 3 to the spreading disk 6, and the discharge end 4c of the mouth piece is oriented radially outward in relation to the rotation axis 5 of the spreading disk 6. The discharge end 4c has an angle of inclination of between 20° and 60°, preferably approximately 35° to 40° in relation to the rotation axis 5. A rotary drive device for the spreading disk 6 has an electric motor A which is offset from the rotation axis 5 of the spreading disk 6 and a gear device 13 which is coupled to the rotation axis of the spreading disk. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a winter spraying service device used in a winter spraying service vehicle for spraying road surface salt moistened with brine (salt solution).

  A spreader of this kind is known, for example, from EP-A-1 433 902, and a spreader disk arranged so as to be able to rotate around a normally vertically oriented axis of rotation, Formed in a shape (but may be formed as a chute), it has a sliding surface that is used to convey the road surface salt from the road surface salt storage tank to the spreading disc. Here, the road surface salt drops onto the spreading disc by gravity through the mouthpiece downstream of the sliding surface. The mouthpiece is directed radially inward toward the center of the spreading disc where the road surface salt hits the central cone. As the spreading disc rotates, the road surface salt is discharged from the spreading disc basically in the horizontal direction, and is thus spread and spread on the road surface. For this purpose, the spreading disc has radially oriented discharge blades distributed over the entire periphery, these blades scoop up the supplied road surface salt and accelerate it towards the periphery of the spreading disc, and thus the road surface. Sprinkling salt is released radially from the spreading disc by centrifugal force.

  The cone surface often has deep, radially extending grooves that scoop and accelerate road surface salt in the same manner as the discharge blade. However, these deep grooves also have an unfavorable effect that the spray pattern of the road surface salt sprayed on the road surface varies correspondingly because the road surface salt is scooped up without being controlled. For this reason, a spreading disc is also used in which the central cone has a smooth surface. However, the salt that is slowed down from the smooth cone surface and falls onto the spreading disc is not necessarily evenly distributed.

  Accordingly, an object of the present invention is to improve a winter spraying service device with the main purpose of evenly supplying spraying grit (coarse grains) or, in particular, a mixture of spraying grit and brine to a spraying disk.

  The object is solved by a winter spraying service device having the features of the independent claim 1. The independent claims describe other preferred developments and embodiments of the invention.

  According to the present invention, the mouthpiece is such that the road surface salt falls from the same place onto the spreading disc by gravity, and the discharge end thereof faces away from the central area of the spreading disc rotating about the rotation axis. Has been placed. Thus, the spreading grid is supplied to the spreading disc in the discharge direction. Here, the discharge end of the mouthpiece is preferably arranged radially outward with respect to the rotation axis.

  Under these conditions, it is possible to eliminate that the spreading grit supplied to the spreading disc falls into the central area of the spreading disc where no centrifugal force acts or very little centrifugal force acts.

  Since the mouthpiece may be arranged in the rotation axis area of the spreading disc when the spreading grit is supplied in the direction of discharge of the spreading disc, the rotation drive of the spreading disc is preferably offset from the rotation axis. This is realized by an electric motor connected to the rotating shaft by a gear device. This creates a certain space for the mouthpiece in the center of the spreading disc.

  The discharge end of the mouthpiece is inclined at an angle of 20 ° to 60 °, particularly preferably 30 ° to 45 °, especially about 35 ° to 40 °, with respect to the rotation axis of the spreading disc. Thus, the spreading grit is slid over the inside surface of the mouthpiece and is directed to be concentrated so that this mixture is targeted and delivered to the spreading disc. The flat inclination angle of the discharge end of the mouthpiece is particularly important when driving at a corner. This is because, for example, in a conventional mouthpiece having a very steep inclination angle of, for example, 6 °, the spread grit is generally radially outward due to centrifugal force acting on the grit in the mouthpiece. If the mouthpiece has a flat tilt angle, but in a particularly preferred embodiment the mouthpiece has a concavely curved cross section, the spray grit resists the centrifugal force by gravity and the mouthpiece This is because the influence of the centrifugal force is remarkably low because of shifting back toward the center. Therefore, a relatively accurate supply of the mixture of spraying grit and brine to the spraying disk is possible even during cornering.

  If the spreading grit is not returned to the center of the runway by a flat inclined mouthpiece, this will have two consequences, both of which have a large influence on the spreading pattern realized on the road surface at the turn. On the one hand, the spreading grit is pressed radially outward in the vertical mouthpiece as described above and therefore hits a different spreading disc area compared to straight running. On the other hand, the spreading grit slides down the running surface in the form of a relatively wide band, which is usually oriented away from the axis of rotation of the spreading disc when running straight ahead. If the spreading grit band is pressed radially outwards against the inner wall of the vertical mouthpiece during turning, the spreading grit band is correspondingly directed radially with respect to the rotation axis of the spreading disc. As a result, the spread angle of the spread spread grit is reduced, thus narrowing the spread pattern. When viewed from above, when the spreading disc rotates clockwise, left turn will shift the spreading pattern to the left, and the right part of the spreading pattern will disappear due to the reduction of the spreading angle, and the remaining spreading pattern will be Dense than set by the device settings. On the other hand, when a right turn is performed, the spray pattern is shifted to the right side, and in this case, the right portion of the spray pattern disappears due to a decrease in the spray angle. Therefore, when a right turn is performed, the spray pattern is almost aligned to the right even if the spray density is increased, but the spray pattern reaches the left range originally set in the device. do not do. Therefore, it is important to take measures to keep the spray grit band that slides down the running surface at the center position even during cornering. A flatly tilted mouthpiece produces this result.

  The centralized and accurate supply of the mixture of spray grit and brine to the spray disk can be further optimized if at least part of the cross section of the mouthpiece tapers in the direction of the discharge end of the mouthpiece. However, good results can be achieved even if the cross section is constant.

  In a particularly preferred embodiment of the present invention, the inner surface of the mouthpiece extends in an arch shape when viewed in a cross section parallel to the sliding direction of the spreading grit, that is, a cross section coinciding with or parallel to the rotational axis.

  Even if the mouthpiece is facing the discharge direction with respect to the spreading disc, if it is desired that the spreading grit be scooped by the cone surface provided in the center of the spreading disc, the inside of the discharge end of the mouthpiece The side surface may be arranged to be inclined with respect to the horizontal plane to be larger than the cone surface of the spreading disc. However, it is also possible to place the mouthpiece so that the mixture of spray grit and brine does not hit the cone surface. In such cases, the cone surface may be omitted entirely if desired. In order to improve the flexibility in use, it is preferable that the inclination angle of the mouthpiece or its discharge end is adjustable. Particularly in this case, it is preferable to design the mouthpiece and the downspout / chute as independent elements. Alternatively, they can be designed together.

  One particular aspect of the present invention relates to an even supply of a mixture of spreading grit and brine to the spreading disc. The salt is often moistened during spraying for spraying on the road surface. It is considered that the anti-icing effect of the moistened road surface salt is realized more quickly, and the scattering characteristics of the road surface salt are favorably affected. However, if the road surface salt is moistened prior to its application, the road surface salt will condense in the containment tank, which greatly complicates the application. Therefore, wetting is usually done during the spraying process. For this reason, the road salt and the brine used to wet the road salt are contained in separate containers for winter service vehicles, and both materials are targeted to a precisely defined area of the rotating spreading disc. By supplying them separately, the mutual mixing is performed only when they are actually sprayed.

  German Patent 3,937,675 shows several alternatives that combine the supply of road salt and brine to the spreading disc, preferably to achieve ideal mixing. By specially designing the discharge blade of the spreading disc, it is intended to achieve an even and intensive wetting of the road surface salt on the spreading disc. In German Patent No. 10,007,926, the brine is fed to the central area of the spreading disc containing the overflow tank, while the road surface salt is directed to the impact surface and sprayed with radial component force from the same place. Collide with the disc. Mixing of glazed salt and brine takes place on a spreading disc. Starting from such prior art, DE-A-10,255,101 arranges a concentric nozzle at the upper end of the downpipe leading to the spreading disc in order to improve the wetting of the road surface salt spread. In this case, the concentric nozzles have holes that are evenly distributed throughout their perimeter, and the spreading grit that is conveyed through the central hole of the concentric nozzle can be It is wetted with brine from the outside by being sprayed with brine from the direction. This concentric nozzle is relatively expensive from a structural point of view, and does not always work properly at high speed corners. The level of brine in the chamber surrounding the concentric nozzles can sometimes be extremely tilted so that the brine can no longer be supplied to all holes in the concentric nozzles located at the periphery of the downpipe.

  Therefore, in a special development of the invention, in order to spread the mixture of sprayed grit and brine, in addition to the sprayed grit supply device for supplying the sprayed grit, if the rotation axis is oriented vertically, the inclination A liquid supply tube is provided at the upper end of the running surface formed by the downspout or chute so as to be effective for forming a liquid film on the running surface. In contrast to the concentric nozzles, the brine is preferably fed directly to the lower wall surface of the inclined downspout or inclined chute so that a liquid film is formed on the sliding surface. In this case, since there is no need to provide a ring chamber surrounding the vertical shaft, the discontinuity of the brine supply during cornering is eliminated. The formation of the liquid film on the downhill running surface is not affected by the centrifugal force acting on the brine during cornering. In particular, the centrifugal force acts in the same way on the liquid film and the supplied salt, that is, they are pushed in the same direction, so the mixing of salt and brine when sliding down the vertical running surface is fundamentally affected. Not receive. Testing has indeed shown that the salt and brine are very well mixed in this way. This mixing can be further improved by the measures described below.

  The road surface salt is preferably guided to the area of the sliding surface where the brine film has already been formed. It is particularly effective that the liquid supply tube and the spray grit supply device are arranged so that the flow of the spray grit supplied by gravity hits the liquid film formed on the sliding surface. Thus, the spreading grit falls onto the membrane and is transported by the membrane and simultaneously wetted in the process.

  In order to achieve simultaneous mixing of the spreading grit and brine while the spreading grit is sliding on the running surface, the angle of inclination of the running surface with respect to the rotation axis of the spreading disc is 5 ° to 40 °, preferably 10 °. It can be between 30 ° and 30 ° is particularly preferred. An inclination of about 20 ° seems to be suitable for most types of spreading grit.

  It is preferable to provide a long or short sliding surface depending on the vehicle height. Therefore, the length of the sliding surface may be changed within a range of 300 mm to 1500 mm.

  In order to form a smooth liquid film on the sliding surface, it is preferable that the end of the liquid supply tube is in direct proximity to the sliding surface so as to enable laminar brine discharge so that splashing does not occur. Since the supply tube end of the liquid supply tube forms an oblique angle and faces the sliding surface, the brine discharged from the tube end is only slightly turned when it hits the sliding surface.

  If the supply tube end of the liquid supply tube is arranged essentially parallel to the axis of rotation of the spreading disc (this is practical from a structural point of view), the downspout or chute sliding surface and the liquid supply The angle of inclination between the tube and the supply tube end is preferably at most 40 °. As described above, the sliding surface is preferably inclined with respect to the rotation axis at an angle of 5 ° to 40 °, particularly 10 ° to 30 °. The feeding is preferably performed at an angle of 45 ° or less relative to the sliding surface, for example 20 °.

  The end of the liquid supply tube has a discharge cross section oriented at least partially obliquely with respect to the direction of the supply tube. By this measure, the central axis at the end of the supply tube can be arranged closer to the sliding surface, and thus a smoother liquid film can be formed on the sliding surface. This obliquely oriented discharge cross-section is achieved by chamfering the end of the supply tube at a suitable angle, for example the 20 ° angle mentioned above, but for supplying brine between the supply tube and the sliding surface. Such chamfering must not take place over the entire diameter of the liquid supply tube, since sufficient passage must be left. The cross section of the remaining passage may be 5-30 mm, preferably 15-20 mm.

  The spray grit supply device for discharging the spray grit preferably on the brine membrane in the area below the liquid supply tube is preferably arranged opposite the running surface, as described above. Thus, any centrifugal force acts in the same way on the liquid film and the spray grit flowing out of the spray grit supply device, so that the spray grit hits the liquid film in any case.

  In a special embodiment, the spreading grit supply device comprises a supply pipe arch or a supply chute arch from which the spreading grit falls by gravity onto the running surface. This type of feed arch concentrates the flow of spreading grit in the direction of the liquid film on the running surface. For this purpose, the supply arch preferably extends in a plane parallel or parallel to the axis of rotation of the spreading disc and has a cross section which tapers in the direction of the sliding surface.

  Since the end of the supply arch is located directly below the spray grit supply device, the spray grit is, for example, apart from the spray grit supply amount adjustment valve that forms part of the spray grit supply device as seen from the function. It falls directly into the supply arch from the sprinkling grit supply device without interposing any other device. The spray grit input end of the supply arch is particularly steep and oriented substantially vertically, so that the spray grit conveyed by the spray grit supply device falls vertically into the supply arch by gravity.

  Depending on the type of spraying grit, a situation may occur in which a part of the spraying grid floats on the liquid film. In order to achieve an even mixing of spray grit and brine in such a case as well, in yet another particular embodiment, the mouthpiece at the bottom of the running surface is inclined in the opposite direction to the running surface, When the spraying grit that has finished sliding is dropped from the lower end of the sliding surface, it hits the inner surface of the mouthpiece and is arranged so as to be reversed from the same place to the discharge end of the mouthpiece. The spreading grit mixed with brine then falls onto the spreading disc from the discharge end of the mouthpiece. Due to this reversal of direction, the spreading grit and brine are intensively mixed again and subsequently fall together onto the spreading disc.

  The area where the mixture of spraying grit and brine falling from the sliding surface to the inner surface of the mouthpiece hits the inner surface is preferably 200 mm from the discharge end of the mouthpiece to achieve the desired concentration and final mixing. In particular at least 230 mm apart. Accordingly, the conceptual extension of the sliding surface intersects the inner surface of the mouthpiece at a location at least 200 mm or 230 mm away from the discharge end of the mouthpiece.

  The present invention is illustrated by the following single FIG.

  FIG. 1 shows a winter spray service device for spraying a mixture of road surface salt and brine. This device may be part of the winter service vehicle or may form part of the superstructure for the winter spray service that is loaded onto the truck. In any case, the spread grit S is conveyed from the spread grit storage tank (not shown) to the upper ends of the vertical unit 2, 3, 4 via the supply path 1 by a suitable conveying device such as a belt conveyor or a screw conveyor. The spreading grit is discharged at the lower end of the downspout unit (which may be formed in the form of a chute device) and falls onto the spreading grit spreading device in the form of a spreading disc 6 that rotates about the rotating shaft 5. The spray grit S is discharged from the same place in a substantially horizontal direction by centrifugal force. The vertical hoist 3 in the middle of the hoist units 2, 3 and 4 may be formed to be telescopic so that the apparatus can be adapted to various spraying vehicles. The length of the downspout 3 needs to be 300 mm to 1500 mm so that a sufficient sliding surface is provided for the spreading grit S and the liquid F or brine mixed with the spreading grit S as described below. Let's go.

  The inclination of the central downboard 3 may be larger or smaller than the inclination shown in FIG. The inclination angle of the spreading disc 6 with respect to the rotation axis 5 needs to be 5 ° to 40 °, preferably 10 ° to 30 °, particularly preferably about 20 °. This inclination angle affects the residence time of the spreading grit S on the sliding surface 7 of the vertical rod 3, and therefore the time used for mixing the spreading grit S and the brine F.

  Since the brine F is supplied directly to the sliding surface 7 at the upper end of the vertical shaft 3 so that a liquid film is formed on the sliding surface 7, the brine F flows down the sliding surface 7 in layers. This is achieved by a tubular liquid supply tube 8 in which the supply tube end 9 is formed in direct proximity to the sliding surface. The supply tube end 9 of the liquid supply tube 8 is opposed to the sliding surface 7 at an oblique angle. In the illustrated embodiment, the direction in which the supply tube is directed is substantially parallel to the rotation axis 5 of the spreading disc 6.

  In order to form the flow of brine F on the sliding surface 7 as a laminar flow from the beginning, the supply tube end 9 of the liquid supply tube 8 is chamfered on the side facing the sliding surface 7. This brings the brine into contact with the sliding surface 7 while it is still guided in the liquid supply tube, thus facilitating the formation of a laminar flow. The cross section of the remaining passage for the brine F between the sliding surface 7 and the supply tube 8 is approximately 15-20 mm, preferably at least 5-30 mm.

  Discharge flow rates of road surface salt S and brine F are automatically determined and preset and depend on the drive speed of the spray vehicle, and the spray width is preset by the rotational speed of the spray disk and the desired spray density. . The liquid supply tube 8 is thus connected via a pump P to a brine storage tank R through which brine F is sent from the same place to the vertical gutter 3.

  In addition to downspout 3, downspout units 2, 3 and 4 feature downspout arch 2 at the top of downspout 3 and mouthpiece 4 at the bottom of downspout 3, of which downspout arch 2 is desired This may be omitted, but this facilitates uniform mixing of the spray grit S and brine F in conjunction with the downspout 3 (or chute) and mouthpiece 4.

  The basic function of the downspout arch 2 is that a predetermined area of the sliding surface 7 located below the supply tube end 9 of the liquid supply tube 8, preferably an area where a layered liquid film is already formed on the sliding surface 7. It is to guide the spreading grit S. In particular, the discharge port of the downspout arch 2 is provided so that the inside of the downspout arch 2 is not splashed with brine and the spray grit S is hardened in the same place, or is hardly so. 2a is located below the supply tube end 9.

  A further special function of the downspout arch is that the spider unit 2, 3 and 4 as a whole (including the sprinkler disc 6) rotate the sprinkler disc 6 relative to the stationary supply path 1 of the sprinkler grit S by the swivel mechanism. Even when swiveling around the axis 5, the spreading grit S always hits the same area on the sliding surface 7 of the downspout 3. If the spray grit falls directly into the downpipe 3 from the supply channel 1, it will not be realized.

  Accordingly, the discharge end 2 a of the downspout arch 2 is disposed to face the sliding surface 7. The downspout arch 2 is parallel to the rotation axis 5 of the spreading disc 6, or preferably in a plane parallel to the axis, and the upper end of the downspreading grit S falls vertically into the downspout arch 2 by gravity. It is located on the lower side of the supply path 1.

  The longitudinal arch 2 is further tapered in the direction of the discharge end 2a. In other words, its diameter is correspondingly reduced and the curvature of the wall surface of the vertical arch 2 guiding the spreading grit S is correspondingly increased. In this way, the spreading grit S is concentrated and hits a predetermined area of the sliding surface 7 of the vertical shaft 3.

  In general, in this way, even in any situation, especially when turning at a corner, a uniform mixing of the spray grit S and the brine F can occur in the downpipe 3.

  The mixture of spray grit and brine is turned again by the mouthpiece 4 at the end of the downspout 3, in this case in particular in the direction opposite to the direction of the downspout. As with the downspout arch 2, the mouthpiece 4 correspondingly extends in a plane parallel to or preferably parallel to the rotation axis 5 of the spreading disc 6. The mouthpiece 4 may be formed as part of the downspout 3 (or chute), but is preferably formed as a separate element whose inclination can be adjusted in particular.

  The mixture of spray grit and brine hits the inner surface 4a of the mouthpiece 4 in an area 4b located at least 200 mm, preferably 230 mm or more away from the discharge end 4c of the mouthpiece 4. After reversing immediately upon hitting the area 4b, the presence of this distance causes the mixture of spray grit and brine to be mixed again, in particular centralized before falling onto the spray disc 6 from the discharge end 4c. .

  Accordingly, the inner side surface 4a of the mouthpiece 4 has an inclination angle of 20 ° to 60 °, preferably 30 ° to 45 °, particularly about 35 ° to 40 ° with respect to the rotation axis 5 at the discharge end 4c.

  The inner surface 4a of the mouthpiece 4 is also formed to form an arch, which in this embodiment tapers in the direction of the discharge end 4c. As with the downspout arch 2, this taper promotes concentration of the mixture of spray grit and brine. However, the cross section can be constant.

  The spreading disc 6 has a central cone surface 11 having a deep groove in this embodiment. In the illustrated embodiment, the inclination of the inner surface 4 a of the mouthpiece 4 with respect to the rotation axis 5 of the spreading disc 6 at the discharge end 4 c is different from the inclination of the cone surface 11. Even when facing away, the mixture of spray grit and brine discharged from the mouthpiece 4 is selected to be scooped by the cone surface 11. However, the basic function of the cone surface is only to keep the spreading grit away from the central area of the spreading disc when the spreading grit is guided onto the spreading disc from the outside in the radial direction, and therefore within the scope of the present invention. The cone surface 11 can be omitted. On the other hand, when the spreading grit is guided on the spreading disc from the inside in the radial direction, the mixture of spreading grit and brine is directly directed to the discharge direction of the spreading disc 6 by the mouthpiece 4 without the cone surface 11 interposed. It is preferably guided on the spreading blade 12. This is because the mixture of spray grit and brine is thereby supplied more accurately than if the mixture were mixed without control by the cone face 11.

  The drive device A of the spreading disc 6 is offset with respect to the rotating shaft 5 of the spreading disc 6 and is drivingly connected to the spreading disc by a gear device 13 which is a belt hoist or chain hoist in the exemplary embodiment shown. This may be, for example, a pinion gear or other type of gear.

It is a figure which shows the winter spraying service apparatus for spraying the mixture of a road surface spreading salt and a brine.

Claims (28)

If the rotating disc (6) is arranged so as to be able to rotate about the rotation axis (5), and the rotation axis (5) is oriented vertically, the spreading grit (S) is caused by gravity from the discharge end (4c). A downspout unit or chute unit (2, 3, 4) for supplying the spreading grit (S) to the spreading disc (6), including a mouthpiece (4) configured to fall on the spreading disc (6) A winter spraying service device having
The winter spraying service apparatus, wherein the discharge end (4c) faces away from the central area of the rotating shaft (5) of the spraying disk (6).   2. Device according to claim 1, characterized in that the discharge end (4c) faces radially outward with respect to the rotation axis (5) of the spreading disc (6).   The rotation drive device (A) of the spreading disc (6) includes an electric motor offset from the rotating shaft (5) of the spreading disc (6), and a gear device connected to the rotating shaft (5) of the spreading disc (6). 13). The device according to claim 1 or 2, characterized by comprising:   The discharge end (4c) has an inclination angle of 20 ° to 60 °, preferably 30 ° to 45 °, particularly preferably approximately 35 ° to 40 ° with respect to the rotation axis of the spreading disc (6). The apparatus according to any one of claims 1 to 3.   Device according to any one of the preceding claims, characterized in that the discharge end (4c) has a concavely curved cross section.   The cross section of the mouthpiece (4) tapers in the direction of the discharge end (4c) of the mouthpiece (4) in at least a part of the mouthpiece (4). The apparatus according to claim 1.   7. The mouthpiece (4) according to any one of claims 1 to 6, characterized in that it extends in a concave arch shape in a plane parallel to or parallel to the rotation axis (5) of the spreading disc (6). The device described in 1.   The spreading disc (6) has a central cone and the discharge end (4c) of the mouthpiece (4) is oriented perpendicular to the rotation axis (5) of the spreading disc (6) with respect to the cone surface (11). 8. The spreading grit (S) falling by gravity from the discharge end (4c) when being applied is arranged so as to hit the cone surface (11) of the spreading disc (6). The apparatus of any one of these.   When the axis of rotation (5) of the spreading disc (6) is oriented vertically, the mouthpiece (4) is from the cone surface (11) of the spreading disc (6) with respect to the horizontal plane at the discharge end (4c). The device according to claim 8, wherein the device is also greatly inclined.   Device according to any one of the preceding claims, characterized in that the angle of inclination of the discharge end (4c) is adjustable.   The vertical saddle unit, that is, the chute unit (2, 3, 4) has an upper end facing the direction opposite to the spreading disc (6) and the spreading disc (6) when the rotation axis (5) is oriented vertically. ), Characterized in that it has a sliding surface (7) of the spreading grit (S) inclined with respect to the axis of rotation (5), with a lower end to which the mouthpiece (4) is attached, The apparatus according to claim 1.   The spray grit supplying device (1, 2) for supplying the spray grit (S) to the sliding surface (7) is arranged at the upper end of the sliding surface (7), and the rotating shaft ( A liquid supply tube (8) for supplying brine (F), designed to form a liquid film on the sliding surface (7) when 5) is oriented vertically, has a sliding surface (7). 12. The device according to claim 11, characterized in that it is arranged at the upper end of ().   Said sliding surface (7) has an inclination angle of 5 ° to 40 °, preferably 10 ° to 30 °, particularly preferably about 20 ° with respect to the rotation axis (5) of the spreading disc (6). The apparatus of claim 12.   14. A device according to claim 12 or 13, characterized in that the sliding surface (7) has a length of 300 mm to 1500 mm.   15. Device according to any one of claims 12 to 14, characterized in that the end of the liquid supply tube (8) is in direct proximity to the sliding surface (7).   The supply tube end (9) of the liquid supply tube (8) is opposite the sliding surface (7) at an oblique angle, preferably at an angle of 45 ° or less with respect to the sliding surface. Item 15. The device according to Item 15.   17. A device according to claim 16, characterized in that the supply tube end (9) of the liquid supply tube (8) has a discharge cross section at least partly inclined with respect to the direction of the tube.   18. Device according to claim 16 or 17, characterized in that the supply tube end (9) is oriented essentially parallel to the axis of rotation (5) of the spreading disc (6).   19. A device according to any one of claims 12 to 18, characterized in that the spray grit supply device (2) has a spray grit discharge port (2a) arranged facing the sliding surface (7). .   The liquid supply tube (8) and the spray grit supply device (2) are spray grit supplied by gravity from the spray grit supply device (2) when the rotation axis of the spray disc (6) is oriented vertically. The device according to any one of claims 12 to 19, characterized in that it is arranged such that the flow of water hits a liquid film formed on the sliding surface (7).   Device according to any one of claims 11 to 19, characterized in that a pump (P) is arranged in the liquid supply tube (8).   22. A spray grit supply device according to any one of claims 12 to 21, characterized in that the spray grit (S) consists of a supply pipe arch or a supply chute arch (2) in which the spray grit (S) can fall on the sliding surface (7) by gravity. The apparatus according to item 1.   24. Device according to claim 23, characterized in that the supply arch (2) is located in a plane parallel or parallel to the axis of rotation (5) of the spreading disc (6).   24. Device according to claim 22 or 23, characterized in that the end of the supply arch (2) forming the spray grit supply device is located below the supply channel (1) of the spray grit supply device. .   The spreading grit (S) fed by the spreading grit feeding device is fed into the feeding arch (2) by gravity from the feeding path (1) when the rotation axis (5) of the spreading disc (6) is oriented vertically. 25. Device according to claim 24, characterized in that it can fall.   26. Device according to any one of claims 22 to 25, characterized in that the supply arch has a cross-section tapering in the direction of the sliding surface (7).   The mouthpiece (4) is inclined in a direction opposite to the direction of the sliding surface (7) with respect to the rotation axis (5) of the spreading disc (6), and the rotation axis (5) is oriented vertically. The sprayed grit that has finished sliding on the sliding surface (7) falls from the lower end of the sliding surface (7) onto the inner surface (4a) of the mouthpiece (4), and the discharge end (4c) of the mouthpiece (4). 27. Device according to any one of claims 11 to 26, characterized in that it is arranged so that it can be inverted towards).   The intersection of the notional extension of the sliding surface (7) and the inner surface (4a) of the mouthpiece (4) is at least 200 mm, preferably at least 230 mm away from the discharge end (4c) of the mouthpiece (4). 28. Device according to claim 27, characterized in that it is arranged.

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