DE148250C - CLASSIFICATION DEVICE IN WHICH THE GOOD IS DIVIDED BY PAIRS OF LYING NEXT TO EACH OTHER, INCLINED ROLLERS WITH ROTATING DIRECTIONS, SEEN FROM ABOVE - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

M 148250 CLASS Aa.

Directions of rotation is separated.

Patented in the German Empire on June 19, 1902.

With the aid of the device described below, batches of unequal large bodies can be divided into several grain sizes.

In a known manner, pairs of rollers are used in which the two inclined rollers arranged next to one another at a certain distance from one another seen above, turn away from each other and

ίο such a loose resting of the goods on the Effect rolling.

In a known device of this type, the rollers of the roller pair are arranged in such a way that the gap between the rolls increases gradually from the head end of the rolls, and that at the head end, d. H. upper end of the pair of rollers abandoned body mass when sliding over the rollers in several, the Width of the gap is broken down into corresponding classes at the various points. These However, the facility has the disadvantage that each coarser grain class before it is theirs Has reached the passage permitting point of the gap, only the one preceding this point narrower gap path, which allows the passage of finer grain classes, must go through. Through this the upper, narrower part of the gap is overloaded with grain and the finer grains are often carried away by the coarser ones, as a result of which the classification "becomes inaccurate and the rollers wear out more quickly. The latter is also the case with the known Drum screen device with several cylindrical ones mounted one behind the other on an axis or conical sieves observed.

The disadvantages mentioned are eliminated in the new device in that several pairs of rollers lying one above the other in this way to form a uniform classifying device be connected that the gap width of the individual roller pairs is constant, however decreases from top to bottom, so the gap width of the top pair of rollers is the largest. Everyone's diarrhea The pair of rollers is always fed to the pair of rollers below, while the assault of each couple represents a finished body class.

The drawing represents in Fig. Ι the side view, in

Fig. 2 is a partial plan view, in

Fig. 3 shows the partial front view of the device.

The four pairs of rollers 1, 1, 2.2, 3.3, 4.4 are mounted with their pins 0 0 in sleeves g of housings f which are rotatable about the shafts dd ¹ d ' ² d ^s. The bearings hh of the lower roll neck sit on the axles i i. The axes ii can be raised or lowered in a guide i ^{1 of} the stand α α ¹ and fixed by screws P and depending on who

Roll inclination can be adjusted. The rolling

- pair i, I is driven by the pulley ρ attached to the top shaft d and the movement through the gears rrr of the shafts d ¹ d- d ³ and the conical gear pairs ce on the roller pairs 2, 2, 3, 3, 4, 4 transferred. The material is fed to the top roller pair 1, 1 at m and, as far as it is not held back by 1, 1, passes as a diarrhea directly onto the roller pair 2, 2 below and from there to the roller pair 3, 3, etc., without first (as happens in the known drum sieve apparatus, which works according to the same principle, with drums arranged one below the other) to be caught by a guide surface leading the diarrhea to the upper end of the next lower pair of rollers.

This mode of operation has several other advantages in addition to being more simple. Because the diarrhea is distributed over the entire length of the pair of rollers below, further classification is facilitated, but more even wear of the rollers is achieved and a significantly lower gradient for the rollers and a lower height of the entire device are necessary. The overflow of the roller pairs is discharged through the channels qq. Around. To prevent the diarrhea from falling onto the gutters q at the lower end of the rollers , gutters k located behind these gutters are arranged at an angle to the gutters q.

Claims (1)

Patent claim: Classifying device in which the material is separated by pairs of adjacent, inclined rollers with, seen from above, opposite directions of rotation, marked by arranging several pairs of cylindrical, parallel bearings Rollers on top of each other with the gaps between the rollers narrowing downwards, with the one at the top of the top one Roller pair abandoned good is deposited on each roller pair a class. 1 sheet of drawings.