DE2313669A1 - SELF-CLEANING DISCONNECTING DRUM WITH DISC SET AND OPENINGS ARRANGED IN THE DISTRIBUTOR BASE, CONNECTING THE INDOOR SPACE WITH THE SEPARATING SPACE - Google Patents

Description

Self-cleaning ^ Separating drum with plate set and in the distributor base arranged openings connecting the inlet space with the separation space

The invention relates to a self-cleaning separating drum with a set of plates and arranged in the distributor foot, the Inlet space with the separating space connecting openings in which the inlet space via an annular gap between the distributor foot and piston valve in connection with the solids space of the drum stands.

Such a drum is for example from the German patent No. 1,297,036 known.

The coarser solids, which are already separating from the liquid in the inlet chamber, enter through the aforementioned annular gap the solids space outside the set of plates. These Automatic pre-separation is very advantageous because the one that slides from the inlet chamber directly into the solids chamber Solids do not pollute the set of plates. However, it is disadvantageous that part of the inflowing liquid mixture also passes through this annular gap enters the space outside the set of plates from which the specifically heavier liquid component flows to its drain. This flow is stronger, the larger the proportion of the specifically heavier component is. In the case of high throughput rates, it is therefore unavoidable to that due to the constant mixing with part of the incoming centrifugal liquid together with the specific heavier liquid component - even if a smaller part of the specifically lighter component is discharged. This is e.g. very disadvantageous when separating milk.

To rule out this mixing to a large extent, were separating drums older design designed so that when inserting the distributor, the distributor foot on an annular projection the drum base was guided until it was seated and

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formed a closed pre-separation chamber with the drum base. A closed chamber has the disadvantage that it is quickly filled with solids, especially when the riser channels are far outside and the centrifugal liquid contains large amounts of solids. Such a separating drum is shown, for example, in the German patent specification No. 36β 213.

It is also known the pre-separation chamber and the solids space to connect the drum through continuously open channels of smaller cross-section, which are distributed evenly over the circumference enforce the distributor base. On the one hand, this achieves that the solids separating from the liquid as it enters the solids space during operation trespass while on the other hand compared to one permanently open annular gap the liquid flow is reduced. A drum of this type is shown, for example, in the German patent specification No. 416 528.

The invention is based on the object of designing a self-cleaning separating drum of the type specified at the outset in such a way that that the pre-separation chamber formed by the distributor base and the piston valve is closed during the centrifugal periods and during the solid discharge is open.

The invention is characterized by a valve plate attached to the piston slide and one outside on the distributor base the protrusion provided through it, which interacts with the axial movements of the piston slide causes the pre-separation chamber to open and close with the cylindrical outer surface of the valve disk.

When the drum according to the invention is in operation, the pre-separation chamber is also emptied with each surge of solids. A sufficient seal is achieved by the sedimentation in the chamber Solids. Since there is an absolute seal on this chamber does not arrive, special seals can be dispensed with.

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In the drawing is an embodiment of the invention shown.

The piston valve 1 is when filling the closing chamber 2 brought into the closed position shown with a control fluid and when draining the control fluid from this Chamber in its open position under the pressure of the drum filling postponed. In the open position it gives the annular gap 3 for the discharge of the separated from the liquid Solids free.

The distributor k is provided with a conical distributor foot 5. Openings 6 in the distributor base connect the inlet space 7 with the separation chamber 8. Between the lower end of the distributor base 5 and the piston slide 1 there is a permanently open annular gap 9.

According to the invention, a valve plate 10 is attached to the piston slide 1, the cylindrical outer surface of which cooperates with a projection 11 provided on the distributor base 5, which is screwed into the distributor base at a greater distance from the axis of rotation than the openings 6. In the closed position of the piston slide 1, the pre-separation chamber 12 is closed with respect to the solids space 13 outside the plate set Ik and, in the open position, is connected to it by an annular gap formed at 15.

With the inventive design of the drum on the one hand prevents part of the inflowing liquid mixture from flowing into space 13 during the spinning periods, from which the specifically heavier liquid component flows through channels 16, while on the other hand through the periodic Opening the pre-separation chamber 12 eliminates the overfilling of solids.

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Claims (1)

PATENTAN'S PUBLIC Self-cleaning separating drum with a set of plates and openings in the distributor base connecting the inlet chamber with the separating chamber, in which the inlet chamber is connected to the solids chamber of the drum via an annular gap between the distributor base and the piston slide, characterized by a valve disk (1O) attached to the piston slide (i) ) and provided on the distributor base (5) outside the passing through it orifices (6) projection (ii), which causes at the axial movement of the spool in cooperation with the cylindrical outer surface of the valve plate to open and close the preseparation chamber (i2). 409841/0028