DE273387C

DE273387C -

Info

Publication number: DE273387C
Application number: DENDAT273387D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- M 273387 KLASSE 5Od. GRUPPE- M 273387 CLASS 5Od. GROUP

RAYMOND MUMFORD in TOTTON, England.RAYMOND MUMFORD in TOTTON, England.

Durch ein Zusatzgewicht belastete Wanderbürste für Schüttelsiebe.Traveling brush for vibrating sieves loaded by an additional weight.

Patentiert im Deutschen Reiche vom 15. Februar 1913 ab.Patented in the German Empire on February 15, 1913.

Die Erfindung bezieht sich auf durch ein Zusatzgewicht belastete Wanderbürsten für Siebe und ermöglicht im besondern die selbsttätige Wanderung einer solchen Bürste durch Schüttelsiebe, d. h. durch flache, in einer zur Wagerechten geneigten Ebene hin und her schwingende Siebe. Das der Erfindung zugrunde liegende Problem ist dadurch gelöst worden, daß das Belastungsgewicht erheblichThe invention relates to traveling brushes loaded by an additional weight for Sieves and enables in particular the automatic migration of such a brush through Vibrating sieves, d. H. back and forth through a flat plane inclined to the horizontal vibrating screens. The problem on which the invention is based is thereby solved been that the loading weight is significant

ίο schwerer (drei- bis sechsmal) ausgeführt wird als bei den Reinigungsbürsten der Plansichter.ίο harder (three to six times) than with the cleaning brushes of the plansifter.

Um dem Leser eine anschauliche VorstellungTo give the reader a clear idea

von der Erfindung zu geben, dürfte es angezeigt sein, den kinematischen Vorgängen im Plansichter und im Schüttelsieb in Verbindung mit ihren Einwirkungen auf die durch die Erschütterungen des Siebes allein angetriebene Wanderbürste eine kurze Betrachtung zu widmen. Es wird dabei auf die schematischen Darstellungen der Fig. 1 bis 3 Bezug genommen, in welchen Fig. ι ein oszillierendes Schüttelsieb in Seitenansicht und Schnitt zeigt,
Fig. 2 ein Grundriß zu Fig. 1 ist, und
Fig. 3 einen Plansichter in Ansicht zeigt.To give of the invention, it should be appropriate to dedicate a brief consideration to the kinematic processes in the plansifter and in the vibrating sieve in connection with their effects on the traveling brush driven solely by the vibrations of the sieve. Reference is made to the schematic representations of FIGS. 1 to 3, in which FIG. 1 shows an oscillating shaking screen in side view and section,
Fig. 2 is a plan view of Fig. 1, and
Fig. 3 shows a plan sifter in elevation.

Die Plansichter sind bekanntlich in wagerechter Ebene wirkende Siebe, die durch ein Exzenter angetrieben werden und eine rotierend rüttelnde Bewegung ausführen müssen. Sie können selbstverständlich nicht als einfach oszillierende Siebe eingerichtet sein, weil dann eine Beförderung des zu siebenden Gutes nicht stattfinden könnte, da die in entgegengesetzter Richtung wirkenden Beschleunigungen sich gegenseitig aufheben. Die Beförderung der Wanderbürste findet nun in solchen Plansichtern dadurch statt, daß die Bürste im Sieb seitlich hin und her geschwungen wird.The plansifters are known to be sieves that work horizontally through a Eccentric driven and have to perform a rotating shaking movement. Of course, they cannot be set up as simply oscillating sieves, because then a transport of the goods to be screened could not take place, since the opposite Direction acting accelerations cancel each other out. The carriage of the Traveling brush now takes place in such plansifters in that the brush is laterally placed in the sieve is swung back and forth.

Die oszillierenden Schüttelsiebe sind in geneigter Ebene angeordnet, eine Seitwärtsrüttelbewegung wie bei den Plansichtern fällt hier fort, vielmehr wird das Sieb ausschließlich in Richtung seiner Längsachse geschüttelt. Die Beförderung des Mahlgutes 0. dgl. findet hier durch die Wirkung der Schwerkraft im Verein mit der Schüttelbewegung des Siebes statt.The oscillating shaking screens are arranged in an inclined plane, a sideways shaking movement as with the plansifters, the screen is used exclusively in Shaken towards its longitudinal axis. The transport of the ground material 0. Like. Takes place here held by the action of gravity in conjunction with the shaking motion of the screen.

Auf Grund der Wesensverschiedenheit der Plansichter und der in geneigter Ebene oszillierenden Schüttelsiebe ist es nicht möglich, eine für einen Plansichter bestimmte Bürste .für ein oszillierendes Schüttelsieb zu verwenden. Denn wie bemerkt, wird die Wanderung der Bürste im Plansichter dadurch erreicht, daß die Bürste hin und her geschwungen wird, während im Gegensatz hierzu im oszillierenden Schüttelsieb die Wanderung der Bürste dadurch stattfindet, daß die Bürste auf der Siebbahn geradlinig abwärts oder aufwärts gestoßen wird, ohne daß die Bürste hierbei eine Seitwärtsschwingung wie bei den Plansichtern ausführt oder auszuführen braucht. Die Bewegung der Bürste findet dabei auf Grund der oszillierenden Schwingung des Siebes statt.Due to the difference in nature between the plan sifter and the one that oscillates in an inclined plane It is not possible to use a brush intended for a plansifter. For use an oscillating shaker. Because as noted, the hike becomes the Brush in the plansifter achieved by swinging the brush back and forth, while, in contrast, in the oscillating shaker sieve, the brush migrates through it takes place that the brush pushed straight down or up on the sieve path without causing the brush to swing sideways as with plan sifters executes or needs to execute. The movement of the brush takes place due to the oscillating vibration of the sieve instead.

Es ist bei den bekannten Wanderbürsten für Plansichter schon als vorteilhaft erkannt worden, sie an ihrem vorderen Teil zu belasten, jedoch darf diese Belastung nur eine verhältnismäßig sehr geringe sein. Andernfalls würde die Bürste entweder die Siebwandungen infolge des heftigen Hin- und Herrütteins bald beschädigen, oder andernfalls würde die BürsteIt has already been recognized as advantageous with the known traveling brushes for plansifters, to load them on their front part, but this load may only be proportionate be very low. Otherwise the brush would either damage the sieve walls as a result of violent shuffling to and fro soon damage, or otherwise the brush would

Claims

even soon be destroyed by the violent impacts against the sieve walls.

It has long been found to be a major deficiency that oscillating shaker sieves, that is, sieves that do not have the circular oscillation movement, due to the plan sifter known brushes could not be cleaned automatically. Inventor has now recognized that if the brush is heavily loaded, about three to six times as heavy as with the Plansifter brushes, the self-action of migration through the vibrating sieve is achieved.

If you let the brush be as light as

In the case of plansifters, the brush cannot migrate because then through the small mass of the same and the resistance of the brush hairs against the sieve mesh the brush would simply go along with the vibration of the sieve without any Relative shift would take place. This is especially the case when the brush is against the Effect of gravity must migrate upwards.

A brush according to the invention is shown in FIGS. 4 and 5 and in FIGS. 6 and 7 in FIG their application to vibrating sieves shown; 6 and 7 correspond to the representations according to Fig. Ι and 2 on an enlarged scale and slightly modified design.

In Fig. 7, the screen box is divided in the usual way, by an intermediate wall β into two parts. The partition wall does not quite reach the narrow sides of the box so that the brush can wander around the sieve box; the path of the brush is indicated by arrows. The brush itself consists of a flat frame α made of wood, leather, etc., which appropriately has the shape shown in FIGS. The frame α can be braced by one or more webs a ^1. Instead of the frame, you can also use an uninterrupted plate. The lower side of the brush can be provided with pegs or projections a ² , which rub directly on the floor of the sieve box and hold the actual brush frame at a certain distance from the floor. In certain cases, however, the device will also be designed to omit these spacer pins. These pins a ² can be made of wire, stiff bristles or the like. The surface of the brush is provided with bundles of bristles c at any point. Likewise, similar bundles of bristles can be attached to the lower part of the brush and to the sides of the same, so that the sieve itself and the other parts of the sieve box can be cleaned on all sides. If it appears desirable, the rear side of the brush can also be equipped with individual bundles of bristles in order to also be able to thoroughly clean the projecting metal sheets g of the box (FIG. 7).

The brush shown has only two sets of bristle bundles on its upper side, but the Brush in other places and with any number of bristle bundles.

The brush is inserted loosely on either side of the partition wall e of the sieve box d below the actual sieve, and indeed it is placed so that its narrower side is turned to the front when walking. The brush is preferably provided with the loading weight b in its front end.

When the sieve is put into operation, the brush moves gradually in a straight direction along one side of the sieve box forwards until it hits the narrow end of the sieve box, where it is inclined and executes movements similar to that of a circular shaking movement of the sieve box around the middle Bend the separating wall of the sieve box around and then walk up the other side of the dividing wall in the sieve box. In order to facilitate the wandering of the brush in the sieve box, the walls of the box can be covered with rubber, fur ο. Like. Be lined. In addition, as can be seen from FIG. 4, the rear corners of the brush can be provided with special plates f . The arrangement can also be made so that the rear corners of the brush are equipped with special bundles of bristles which rest against the side walls or against the central wall of the sieve box when the brush moves forward.

Pate ν T-A ν SPRU c η:

Moving brush for vibrating sieves loaded by an additional weight, i.e. for flat sieves swinging back and forth in a plane inclined to the horizontal, characterized in that the loading weight (b) is considerably heavier (three to six times) in order to enable automatic migration through the sieves than cleaning brushes for plansifters.

1 sheet of drawings.