DE39066C - Ball mill with partition walls and conveyor stars - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The machine is mainly intended for grinding and mixing cement, can but can also be used with advantage in flour milling for grinding semolina or even for grinding.

The machine can always be used with advantage where dry substances are to be ground come that do not suffer from heat and do not become sticky.

It consists of a drum A, which is composed of two or more (in the drawing 5) compartments or chambers A ¹ A ¹ and rotates with the hollow axes A ^a A ^3. The inlet tube C is bolted to the two bearings B ^Λ with respect to the drop ^{tube C 1} , which at the same time carry the bearings for the shaft D , which runs through the drum A and in the hollow axes A ^{B of the} same, the inlet and outlet screws -Z ) ¹ resp. Z) ² carries.

The solid partition a'a ¹ between each two compartments A ¹ A ¹ is bent too conically after the failure (α ³ α ³ ), and in front of this hollow cone the conveyor star A ^{% is} attached, which conveys the ground material from one compartment to the other (Fig. 1).

The feed roller E is located above the inlet pipe C , and the feed of the ground material is regulated by the slide J? ¹ , adjustable by screw F and nut F ¹ (Fig. 3)

If the machine is used for pulverizing or grinding, so the different divisions ^ 4M ¹ by the hand holes A * "A ^, each of which has chamber of a, o filled with the necessary number of balls 0 ¹ o ^2, wherein one on zweckmäfsigsten Balls of different thicknesses used to achieve faster grinding.

Should the machine be used for polishing, e.g. B. from rice, no balls come Use, but the polishing is done by the constant rubbing of the grains to each other.

The body G is filled with the ground material to be crushed, which, when different substances come to be ground and mixed, has been superficially mixed in some way.

The drum is set in motion by the back gear H and drive H ^x (Fig. 1 and 2).

The worm shaft and the feed roller are driven by the same back gear. The screws run counter to the movement of the drum, since this is more advantageous in the opinion of the inventors, but can also run in the same direction as the drum and also firmly connected to it which makes the shaft completely unnecessary.

The screw D ¹ introduces the ground material in a coarsely ground or granular state into the first division, in which it is now immediately processed and smashed by the balls, which are constantly carried up by the wave-shaped jacket and then fall down again; the crushed material rises while the coarse material always sinks into the area of the balls, and as soon as the chamber is half or a little over half full, the uppermost grist penetrates into the narrow one

Paths λ ² λ ^{2 of} the conveyor star A ² , which are so narrow that they do not let any balls through, and now slides on the surface of the star wall which is too inclined after the failure into the next chamber; If this chamber is also filled to the required level, the same process is repeated, and so on, so that different degrees of delicacy predominate in each compartment.

When all the chambers are evenly filled, that which has been ground to powder in the last one Regrind introduced through the last star conveyor into the outfeed screw, the same drains through the drop pipe.

This ensures uninterrupted operation because there is so much coarse grist continuously supplied, is also continuously discharged again as a finely ground powder, and the The degree of delicacy depends partly on the number of departments present, on the other hand according to the amount of supply; So it is entirely up to the machine Operator, any desired degree of fineness of the grist to be ground to achieve.

Is it desirable to cool the machine in order to prevent the grist from heating up too much? prevent, an opening can be made on the inlet and outlet pipe, their the last, connected to a suction fan, causes the necessary cooling.

The arrangement of the feed roller E and the slide E ¹ is such that the feed ceases immediately when the apparatus is brought to a standstill, even if the slide is in its highest position.

This is achieved by the position of the slide, which, viewed from the inlet side, lies on this side of the feed roll center, so that when this roll comes to a standstill, in the slide opening forms an angle of repose that prevents the ground material from flowing in. This prevents clogging of the feed pipe and the screw.

The flap G ^! enables the slide ΪΓ 'to be positioned and a dust-tight seal, while larger lumps which have been carried along by the flap G ² and which are deposited in the pocket g can be removed.

^{The feed paths α 2} α ^{2 of} the conveyor stars A ² A ² are set in the direction of the radius in the drawing, but can also be arranged in a spiral to ensure that the material to be ground is picked up reliably.

In order to prevent the ground material from penetrating the bearings, the felt, hemp or soapstone packs bb ¹ cc ¹ are arranged; the openings (hand holes) A ^ A ^ for filling in the balls are sealed with felt or flannel and firmly screwed, so that the whole machine is completely dust-tight in all directions.

Claims (1)

Patent claim: A drum A divided into two or more chambers A ¹ A ¹ by partition walls a ¹ a ¹ , provided with inner conveyor stars A ¹ A ¹ , with channels a? a ² and inclined sliding surfaces, as well as feed and discharge screws Z) ¹ Z) ² for the gradual comminution of the ground material fed in by the action of balls ο o ^l o *. For this purpose ι sheet of drawings.