DK149047B - APPARATUS FOR EXPOSURE OF CORNFORMED FRICTION MATERIALS ON TRAFFIC SURFACES - Google Patents

Description

149047 i

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an apparatus for sprinkling grain-shaped friction materials on trafficked surfaces, and which is provided with a plurality of spacer plates spaced apart with radial flush rails and having a baffle plate on a portion of their circumference. , as well as where the top plate is preferably covered by a sheath.

It is sought with such apparatus that all material supplied to the apparatus is spread as uniformly as possible over the surface in question.

However, it has been found that by using the prior art apparatus of the kind in question, cf. hereby e.g. in British Patents Nos. 1 160 010, Nos. 1 222 126, and Nos. 1 238 980, a portion of the material falls directly onto the surface in question and is thus not caused to participate in the spread. This defect is remedied by an apparatus known from German Gebrauchsmuster No. 1 902 798, which is equipped with two parallel drive shafts, one carrying one and the other two over 20 spaced discs, and where the plate on the first shaft engages partially in between the two plates on the second shaft, so that the plate on the first shaft can capture material falling from the top of the two plates on the second shaft, and the lower of these two plates can capture materials, falling from the plate on the first shaft so that all the material will participate in the spread.

However, the manufacture of this apparatus is costly, and the object of the invention is therefore to provide an apparatus which can be made considerably cheaper, and which, however, achieves an equally good spread and utilization of the material.

2 149047

This is achieved according to the invention by the fact that in an apparatus of the kind mentioned at the beginning, each spreading disc has a larger diameter than that immediately above this plate.

In this embodiment of the apparatus, material which is not thrown directly from an upper plate will fall onto the underlying plate and be incorporated into the spread by it.

In the embodiment of claim 10 according to claim 2, it is achieved that material falling from an upper plate is intercepted by the gutter on the lower plate in order to be thrown from the bottom thereof over the rim of the gutter, so that improved spreading thereof is achieved. trapped material.

The invention is explained in more detail below with reference to the drawing, in which 1 is a side view of an apparatus according to the invention; FIG. 2 is a side view of another embodiment of the apparatus, and FIG. 3 shows the apparatus of FIG. 2 from above.

From a supply shaft 11, in the direction indicated by arrow 12, material is dispensed for discharge to a first distributor plate 6 which is placed directly under a sheath 1. Nozzles 3 are provided under the sheath 1 for spraying the material with which the material is sprayed. 8 fan shaped. The distributor plate 6 rotates with a shaft 14 at a speed dependent on the speed of the load-bearing vehicle, the shaft 14 being connected in a manner to the motor of the vehicle. Also, fluid delivery is controlled depending on the run, so that the same amount of uniformly wetted material is still being sprinkled and a uniform flow is achieved on the roadway.

5 For rotation with the distributor plate 6 there is at least one additional distributor plate 6 'of larger diameter than the first. Hereby, during the rotation between the two distributor plates 6 and 6 ', an air flow is formed which contributes substantially to a uniform spread of the wetted material. This effect is further enhanced when the lower distributor plate 6 'has a central opening 9, so that air flows as shown by arrows 13 in FIG. First

Preferably, at least one of the two distributor plates has throw rails 4 and 5, respectively, thereby obtaining a very fine distribution both of the material and of the wetting fluid supplied. This effect can be further enhanced by the fact that, as shown in FIG. 2, the edge of the lower distributor plate is formed with a gutter 10 vaulted against the bottom concave 20, and that over the sheath 1 there are spray nozzles 2 whereby liquid is sprayed against the gutter. Liquid thrown backward from the gutter strikes the underside of the material and contributes to a uniform wetting.

Preferably, the distributor plates 6, 6 'are adjustable not only in height, ie. their distance from sheath 1, but also to each other, so that the most favorable efficiency can be obtained between the scattered material and the wetting intensity.

The material falling from the edge of the upper distributor plate 6 into the distributor plate below is ejected upon its rotation.

The scattering is sometimes desired to be limited to a certain angular range. Eg. it may be desirable to avoid the material being thrown against the vehicle. The apparatus according to the invention is therefore preferably provided with a baffle plate 7 which, as shown in the drawing, may be part of the sheath 1 and extends over 180 °. However, the baffle plate may also be arranged in other ways, e.g. on the rim of one or both of the distributor plates 6, 6 '. Furthermore, 10, e.g. With the help of hooks a baffle plate could be hung on the vehicle.

The use of the baffle plate causes an increase in the portion of the material falling downwardly from the edge of the distributor plate, so that the distributor plate (s) below is spreading more material and consequently a more uniform and even scattering is achieved.

The drawing does not show a third or further distributor plates, but their arrangement and function are similar to those described above.