DE735244C - Vibrating tube mill - Google Patents

Description

Rohrschwin-, mill object of the invention is a particularly effective one Vibratory tube mill, in which in a tube, the circular or approximately circular Performs oscillatory movements in the plane perpendicular to its axis, loosely in the longitudinal direction of the outer tube lying tubes and rods or sections of tubes and rods are nested in such a way that these inner parts against each other and circulate against the outer tube when this tube vibrates. Preferably such a movement type is possible if the differences between the Inside and outside diameters of two adjacent nested parts approximately-of the order of magnitude of the diameter of the circular ßahnkui-ve are. the The frequency when operating such mills is up to 50 Hertz. You can also have a number such outer tubes, each of which is provided with inserted grinding tubes, parallel or preferably bundle them in parallel and the whole system in such vibrations offset.

Rotating tube mills have already become known that are known as Grinding media several nested pieces of pipe and a fully cylindrical one in the middle Piece included. These tube mills, however, are not driven by vibration exciters driven, but with them the tubular grinding container rotates, and this has the effect of that the contents of this tube only have a grinding pressure equal to the total weight the pipe sections, etc. exercises. In the case of the vibratory mills according to the invention, however the force field becomes due to the extremely rapid mechanical vibrations that occur and thus the effect multiplied.

The structure of such a mill will be discussed schematically below with reference to the drawings. Fig. I shows a pipe t of any length, in practical guides about 1 to 1 In and, for example, 50 111111 1. W .., into which a second pipe 2, outside diameter, for example is inserted loosely. In this tube there is again a tube 3 at the front outside diameter 361m11, inside diameter 301n111, in this finally in round rod d. inserted with a diameter of 16111111. The outer tube i _is mounted so as to vibrate and can be excited in any known manner to form circular or approximately circular Schwingull-ell, the trajectories of which lie in a void plane perpendicular to the axis of the outer tube i.

If this system becomes circular Sellwilagull-en from about 3 to 61n111 orbit circle diameter fully excited at a frequency of 12 to 25 Hertz, see above begins (read whole inner, interlocked Rolirsystein extraordinarily to walk around briskly. The type of movements is shown schematically in Fig. 2, 2a and 1).

The stroboscopic observation shows that all rollers roll into one another and that corresponding to the accelerating rotating field, which is multiplied against the earth's acceleration, strong pressing pressures are generated. Since all tubes are in the same radial position in every phase, i.e. according to Fig.?, 2 a and 2b inliner the same; Have points of contact, the rolling movement is connected with freely selectable sliding movements. The over- bt, # surprising that this movement is completely regular without unregulated jumping back and forth. If dry, moist or wet ground material now falls into the spaces between the tubes or if the Malil-ut passes through these rattles, it is extraordinarily comminuted, especially since the shape and surface development between the outer and inner diameters are necessary for the shredding process large surface pressure is very cheap. It is often civilized to keep the cross-sections only partially filled with -Nallinahlung.

As Fig. 3 shows, the outer tube i is undivided along its entire length, while the inner tubes 2 and 3 and the rod a. useful in shorter sections, which do not all need to be equally latent, are divided. That way will a good arrangement of the purer talillic bodies on their whole body, even if they are uneven Distribution of the grist achieved.

It is also possible that during the crushing process the -r (@l ') pieces of the material to be ground are mainly in your pipe system outwards I @ gcn and the finer particles more inwards, so that the larger Parts on the outside mechanically machined through the circulation of the inner parts, also on the strongest part "-earth. The whole tube system is secured by a bolt 5, xl "r through the outer tube i is inserted, or held together by a stop or the like.

Fig-. shows the assembly of a vibrating mill from a large number of pipe systems of the type shown in Fig. 1 with elastic mounting 12 of the entire arrangement - a frame and, for example, a drive by a so-called cantilever do an axis 6 innlatifenden Hasse;.. the shaft 6 is fixedly supported in the common end walls of the parallel tube bundle, and the mass runs in a hollow cylinder S -um the crude combined in a bundle rystunie 9 to 9-1 # iverden characterized s s geineiii -; # iiii i11 pale phase excited.

In this device, for example, material to be ground is naP your pipe is pumped in and runs through urgent connecting pieces (Rolirkriinimer or pieces of hose) all pipes in sequence or when they are switched part of the pipes with parallel flows, then full your pipe goes to the mill finely ground to leave again. It interferes with the grinding mechanism. when the roller blinds are slightly inclined to the horizontal to allow the desired passage to promote.

In contrast to other vibratory mills with loosely poured 1Malil bodies, like hligeIn, the pipe-like 'Iahlräunia' or the 'lalilräuine of this' machine also be arranged upright, so that in this case the circular or approximately l @ reisförnii "e trajectory runs in a horizontal plane.

The circular vibrations can be generated in a known manner by three-phase actuators electromagnetic systems by means of oscillating magnet pairs crossed at right angles, by so-called cantilever chairs, by coupled masses, finally in areas the forced vibrations or be excited in resonance. In all of these In some cases, the mill is to be arranged or hung up in elastically oscillating floors. Finally, especially for lower speeds and larger orbital circles This full maybe 10 or 15 mm, also arranged inevitable eccentric drives The mill is divided into two parts according to a well-known construction can be divided, which oscillate in opposite directions, so that on this `` '' disruptive forces largely switched off. The pipe system can also be heated or coolable, and there can be sound-absorbing between and around the pipes Masses are attached and a wide variety of building materials are used. For example, it is recommended that the `surface of the pipes and hardening rods, such as autogenous. In the case of continuous mills of this type, any Provide the path through the pipes liquid or gas to be supplied or discharged.

Claims (1)

PATENT CLAIMS: i. Vibratory tube mill, the circular or approximate performs circular oscillating movements in a plane perpendicular to its axis, characterized in that in a tube used as a grinding housing or in a bundle such pipes lying loosely in the longitudinal direction of the outer pipe or pipes and rods or sections of tubes and rods nested inside one another are. z. Vibratory tube mill according to claim i, characterized in that the differences between the inner and outer diameters of two adjacent nested ones Parts are roughly of the order of magnitude of the diameter of the circular trajectory. 3. Vibrating mill according to claim i and z, characterized in that a larger one Number of tubes for conveying the grist flow one behind the other or partly in parallel to each other, partly lu @ n are connected to each other.