EP1848540B2 - Separator drum - Google Patents

Abstract

A separator drum for a separator having a vertical rotational axis. The separator drum includes an upper drum section, a lower drum section, and a screw connection formed between the upper end lower drum sections without a locking ring. The upper drum section is screwed into the lower drum section or the lower drum section is screwed into the upper drum section. A portion of the upper drum section adjacent the screw connection engages behind a portion of the lower drum section adjacent the screw connection in a manner of a clamping device.

Description

The invention relates to a separator drum.

For separators with vertical axis of rotation i.allg. along the machine axis through an inlet pipe and this downstream radial distribution channels the product feed into the centrifugal drum, where the product in a plate stack of i.allg. arranged close to each other, relatively spaced, conical (separation) plates enters. At the separation plate heavier solids i.allg. at the bottom and migrate to the outer periphery of the Tellerpakts, whereas the liquid flows inward (two-phase liquid-solid separation). Solids are often discharged through nozzles or via solids discharge openings with upstream piston slide.

The drum with a vertical axis of rotation generally has a drum base and a drum top or lid part, which are screwed together by means of a separate locking ring. Such a construction is for example from the DE 35 11 422 or the DE 39 36 165 A1 known. A direct insertion of the drum base in the drum shell - see for example the US 2,369,222 or the EP 0 312 233 B1 can lead to undefined running conditions, as the drum parts due to the currently common high speeds of up to 10,000 revolutions per minute in operation too much, which in turn can lead to the loss of an exact guidance of the parts to each other. This also applies to the idea of a direct screw connection between a drum base and a lid. Constructions of this kind show the centrifuge of the EP 0309 478 B1 and the generic separator of US 1,356,274 ,

Nevertheless, a functional direct connection between the drum top (also called drum lid) and the drum base, which does not require a centering ring and is fully functional even at higher speeds, would be of great interest.

The solution of the above problem is the object of the invention.

The invention solves this problem by the subject matter of claim 1.

This construction has many striking advantages.

The locking ring as a separate part is saved. Thus, the solution is inexpensive.

The design of the threaded area reliably prevents the ingress of dirt.

The clamping counteracts the centrifugal force-induced widening, in particular of the lower drum part, and ensures centering and guiding of the supporting drum parts relative to one another.

Advantageous embodiments can be found in the dependent claims.

A the drum part outside engaging behind or einklammerder centering ring is made of PCT / SE / 00249 but does not disclose the idea of direct clamping combined with a screw connection.

Preferably, the adjacent surfaces in the region of the clamping surfaces of the drum shell and the drum base are formed conical or cylindrical.

In this embodiment, piston valves and / or other emptying systems can be used without difficulty despite the simplified connection between the drum base and the drum shell.

The drum base can be made easier because it no longer requires a support point for the drum lid. Further, based on the outer diameter of the drum, the outer diameter of the drum seal can be increased. This results in a better utilization of the drum interior.

Fig.1

eine Schnittansicht durch den Verbindungsbereich zwischen dem Ober- und dem Trommelunterteil einer ersten erfindungsgemäßen Separatortrommel; und

Fig.2

eine Schnittansicht durch den Verbindungsbereich zwischen dem Ober- und dem Trommelunterteil einer zweiten erfindungsgemäßen Separatortrommel.

The invention will be described in more detail by means of embodiments with reference to the drawing with reference to embodiments. It shows:

Fig.1

a sectional view through the connecting region between the upper and the lower drum part of a first separator drum according to the invention; and

Fig.2

a sectional view through the connection region between the upper and the lower drum part of a second Separator drum according to the invention.

Fig. 1 shows the connection region between the drum shell 1 and the drum base 2 of a separator drum 3 according to the invention with a vertical axis of rotation (not visible here).

The drum shell 1 and the drum base 2 are each conical and go in the region of their largest diameter each in a on the outer circumference (drum shell) or on the outer circumference and inner circumference cylindrical portion 4, 5 via.

In particular, the drum base 2 has an axially slightly longer cylindrical portion 5, in which a piston valve 6 is guided axially displaceably with a peripheral seal 7. The spool 6 is used to release Feststoffaustragsöffhungen 8 in the drum base 2 and to close.

Fig. 1 shows the opened state of the solids discharge openings. 8

In the closed state of the solids discharge openings 8 (not shown here) the piston valve 6 is located with an upper annular surface 9 on a lower collar 10 of the drum shell or on a ring seal 11 in the collar 10 at.

The outer cylindrical and inner conical portion 4 of the drum shell 1 is dimensioned such that it engages in the cylindrical portion 5 of the drum base 2 axially.

On the outer circumference of the cylindrical portion 4 of the drum shell 1 and on the inner circumference of the cylindrical portion 5 of the drum base 2, an external thread or internal thread 12,13 are respectively formed, so that the drum shell 1 is screwed into the drum base 2.

On the upper edge of the cylindrical portion 5 of the drum base 2 is located on the outermost circumference of the drum base 2 above the screwing a radially outwardly projecting annular collar 14 of the drum shell 1 on. This annular collar 14 has in the outermost region in turn at least one axially downwardly extending projection 15, which comprises an axially above the Verschraubungsbereiches projecting annular collar 16 on the drum base 2 outside. The projection 15 may also be formed as a circumferential annular collar or comprise a plurality of sections or areas which are arranged circumferentially distributed on the drum shell 1 (not visible here).

In the axial direction is after Fig. 1 limited by the investment of the two parts in the cone 17a, 17b, the penetration depth

In this way, in each case a direct, closure ring-free screw connection between the drum base 2 and the drum shell 1 is realized while nevertheless effectively prevented in a likewise simple manner that problems occur due to the expansion of the drum base 2 during the rotation during operation in the region of the screw connection.

It is essential in the construction of the Fig. 1 and 2 in each case, that the projection 15 - whether annularly or partially circumferentially distributed - the drum base 2, preferably the upper annular collar 16, engages behind in the manner of a clamping.

To Fig. 1 are the approach 15 and the annular collar 16 in their facing surfaces 17 a, b formed conically, which limits the penetration depth, while Fig. 2 In this area, axially extending cylindrical surfaces 18, 19 are formed.

Both variants have their advantages, wherein the conical surfaces 17a, b realize a particularly tight rear grip, since these conical surfaces accumulate on each other when expanding.

Usually, the drum base 2 and the drum shell 1 are bolted together on the closure ring. Since this is just saved here and on the other hand on the drum top a sufficient surface for applying a corresponding (not shown) screwing tool is present, it is expedient to provide the drum shell 3 directly to a further development means for attaching such a tool. Fig. 2 discloses as such means a bore 20 in the drum shell 1. In this bore 20 and possibly one or more further holes can be fastened together by means of corresponding bolts the tool (eg a kind of handle, not shown here) for screwing the two drum parts. In operation, the bore may be closed by a bolt, for example, which is then released for attaching and securing the tool.

reference numeral

Drum shell

1

Drum base

2

separator

3

section

4, 5

spool

6

peripheral seal

7

solids discharge

8th

ring surface

9

Federation

10

ring seal

11

External thread or internal thread

12.13

collar

14

approach

15

collar

16

surfaces

17, 18, 19

drilling

20

Claims (6)

1. Separator drum (3) for a separator with a vertical axis of rotation,

   a) with a drum upper part (1) and

   b) a drum lower part (2),

   c) wherein a screw connection or a thread is formed between the drum upper part (1) and the drum lower part (2),

   d) wherein the drum upper part is screwed directly into the drum lower part without a locking ring, and

   e) wherein the drum part situated internally in the region of the screw connection clamps or engages behind the external drum part on the outside in the region of a clamping element,

   f) wherein the drum upper part is conical on its outside and inside and merges in its lower region into a portion (4) which is cylindrical at least on its outer periphery,

   g) wherein the drum lower part is conical on its outside and inside and merges in its upper region into a portion (5) which is cylindrical on its outside and inside,

   h) wherein the drum upper part (1) has a lower projection (15) which engages on the outside behind an upper annular collar (16) on the drum lower part (2) to form the clamping element,

   i) wherein an external thread (12) is formed on the outer periphery of the cylindrical portion (4) of the drum upper part (1) and an internal thread (13) is formed on the inner periphery of a cylindrical portion (5) of the drum lower part (2), with the result that the drum upper part is screwed into the drum lower part, wherein the projection (15) and the annular collar (16) are situated above the screw connection region.
2. Separator drum according to Claim 1, characterized in that the surfaces of the drum upper part (1) and of the drum lower part (2) which bear against one another in the region of the clamping element are conical.
3. Separator drum according to Claim 1, characterized in that the surfaces of the drum upper part (1) and of the drum lower part (2) which bear against one another in the region of the clamping element are cylindrical.
4. Separator drum according to one of the preceding claims, characterized in that the projection (15) and the annular collar (16) are conical or cylindrical in the region of their mutually facing surfaces (16, 17; 18, 19).
5. Separator drum according to one of the preceding claims, characterized in that a piston valve (6) is guided in an axially displaceable manner in the cylindrical portion (5) of the drum lower part (2) and serves to open and to close solids discharge openings (8) in the drum lower part (2).
6. Separator drum according to one of the preceding claims, characterized in that means for applying or attaching a tool for screwing the drum upper part (1) to the drum lower part (2) are formed on the drum upper part (1).

Images