DE919758C - Method and device for sieving off viscous masses - Google Patents

Description

Method and device for sieving off viscous masses The invention concerns a vibrating sieve for sieving masses for the porcelain and clay industry, for the chemical and related industry, but also in general for all viscous or similar difficult to sieve, fine, liquid or pulpy masses.

As a rule, pot-like sieves are used, the bottom of which through the Sieve surface is formed. They have the peculiarity of becoming themselves after a relatively short time Time to add residue from the middle, so that the operation is proportionate often has to be interrupted to clean the sieve surfaces. The sieve residues that often consist of sharp grains, destroy the fine tissue prematurely.

An attempt to place the sieve surface vertically and you in the sieve plane Imposing vibrations led to the sieve being clogged soon and did not result in any sufficient solution.

The invention is based on the idea of sieving off viscous masses to set flat, vertically positioned screen surfaces in such vibrations that run both in the sieve plane and perpendicular to it, and concerns a sieve pot, in which several such sieve surfaces are connected next to one another. The sieve surfaces preferably form a regular polygon.

Are known vertically placed cylindrical sieves that, in horizontal Circular vibrations offset, can be used to sieve off viscous masses. towards you the new vibrating sieve has the advantage that the sieve fabric does not have to be maintained its shape on a perforated plate or the like. Must be supported, which the vibrations with special needs. As a result of the omission of the perforated plate, the passage cross-section is much larger than with cylindrical sieves.

With known rotating sieves, the vibrations of the sieve surfaces also inhibited by centrifugal force, with others being fixed cylindrical Seven additionally generated radial pressure forces can have a similarly obstructive effect.

On the other hand, the flat sieve surfaces can be unhindered with the new sieve bowl vibrate with inhibitions of this kind, and the screening is therefore immensely effective. The vibrations perpendicular to the sieve level cause self-cleaning, through which the sieve passage is kept free at all times.

The vibrations can be horizontal or vertical circular vibrations, elliptical or other vibrations composed of several components as long as they are only effective both in the plane of the sieve and perpendicular to it.

These vibrations are preferably transmitted to the entire sieve pot. The screen fabric can then be rigidly attached to this, preferably by means of a tensioning device that tensions the tissue like a drumhead.

The sieve residues collect on the closed bottom of the pot-like Strainer body. At this point, similar to a well-known sieve, a removable one becomes Arranged caisson, which allows the residues even during operation to remove. If necessary, several such caissons can be added to a sieve Exchange operation can be used.

The sieve box is preferably suspended in a rubber sleeve, which allows the execution of circular oscillations. It was found that the Effect is increased if care is taken that the distance between the pot-like sieve and the fixed inlet through suitable, in particular likewise elastic means is secured. This is best done through an appropriate one Approach of the rubber sleeve itself, so that no special spacers are required are.

In the drawing, an embodiment of the new screen is shown.

Fig. I shows a view of the screen with a partial section; Fig. 2 shows a plan view; Fig. 3 and q. represent details.

As can be seen from Fig.2, the pot-like screen body i is pentagonal educated. On four of its sides it carries a window 2, the one with a flat one Sieve covering 3 is equipped. The sieve area is so to speak in four Parts divided.

This has several advantages. Once the standard sieve web can be used make better use of it, as several, relatively small, rectangular sieve surfaces can be cut out are, further is only a relatively small one if a sieve surface is damaged Replacing the sieve field, while always the same with the previously used versions the entire sieve surface has to be renewed.

The tensioning of the relatively small planes that exist in the new sieve Sieve surfaces can be done effectively with simple means, and it will Overall, a large screen cross-section is obtained even with small individual screen areas.

The polygonal design of the screen body offers, among other things the advantage that the flat walls, so to speak, baffles for the circular Represent vibrations offset material, whereby a certain turbulence of the material to be screened takes place, which is conducive to rapid screening.

The individual screen mesh 3 are on an annular groove q. of the screen body and are placed in this by the rubber ring 5 when tightening the clamping ring 6 pressed in, causing them to stretch like an eardrum.

The caisson 7 is placed on the sieve body, which is closed at the bottom, with the help of the handle 8 at any time, including during operation, including the Sieve residues can be removed. The screen body is useful for this kept slightly conical. At the upper edge is the sieve pot through a rubber sleeve 1o elastically connected to the stationary ring ii. The rubber sleeve is through Pipe clamps 12 and 13 attached to parts i and i i and has an inner Extension i ¢ on, which the observance of a certain distance between them Sharing guaranteed.

The fixed ring i i carries the motor 15, which has an elastic Coupling 16 is a known unbalance disk not shown in detail in the drawing drives in the housing 17 and thus acts as a vibration exciter.

The motor could also sit on the screen body, and a or several magnets or other vibration exciters are used.

Instead of hanging, the strainer can also stand on elastic supports rest. It can also be funnel-shaped.

In the case of a sieve pot with only two opposing sieve surfaces also a circular oscillation or an elliptical oscillation in a vertical plane be expedient.

Claims (5)

PATENT CLAIMS: i. Vibrating sieve for sieving off viscous masses with im essentially vertical sieve surfaces, some of which are in the sieve surfaces and are partially set in oscillation at right angles to them, marked through a sieve pot with several level, vertical ones connected next to one another or almost vertical sieve surfaces, either alone or in conjunction with the Sieve pot can be made to vibrate. 2. vibrating screen according to claim i, characterized by a polygonal design Sieve pot with sieve surfaces on several sides. 3. vibrating screen according to claim z, characterized by a five-sided polygon as a sieve pot, the one on four sides with flat sieve surfaces is provided and carries the vibration exciter on the fifth side. q .. Vibrating screen according to one of claims i to 3, characterized in that the sieve pot with a elastic suspension, in particular elastic cuff; around the inlet cross-section is provided to the screen body. 5. vibrating screen according to claim i, characterized by the conical design of the screen pot. Addressed fonts:; German patent specifications No. 707 9z6, 830 31 1 German patent application p 5 i 1 68 VI b / 8o a D; U.S. Patent No. 2,5oo,965.