DE1079490B - Valve for filling milk and other foaming liquids - Google Patents

Description

GERMAN

The invention relates to valves for filling milk or other foaming liquids in vessels or transport containers, in particular in metal cans.

Such a valve consists of a valve housing with a liquid inlet and a downwardly directed one Liquid outlet with one of several superimposed fine-meshed sieves existing sieve package is provided and has a valve seat above the same, which is provided with a from the outside controllable valve body cooperates.

A major disadvantage of the filling valves used so far is the following: After closing the The valve leaves a lot of milk in the rather large space between the sieve pack or a filter and the valve seat with valve body back and gradually runs out, whereby the parts below the valve get dirty. These disadvantages occur particularly when the valve device moves sideways, as in the case where the cleaned cans are advanced by a conveyor belt.

It has therefore already been proposed to attach several sets of gauze to the mouth of the valve housing to arrange existing sieves, which are provided with rectangular, mutually offset openings. The liquid remaining above the sieves after the shut-off device is closed should pass through a between the shut-off valve and the sieves created vacuum are prevented from flowing away. This requires however, a careful and expensive sealing of the outlet piece. There is also wear and tear the gauze strainers cannot be avoided, which necessitates frequent replacement of these parts.

In the case of stationary valve devices, attempts have also been made to reduce the contamination by dripping Prevent milk through drip trays underneath the valve. These drip trays have a drain line to lateral collection containers. However, this device is not satisfactory because the dripping Milk is sprayed or splashed on the drip tray, apart from the fact that such drip trays for laterally movable valve devices that are used to fill milk into jugs on moving conveyor belts Find use, cannot be used.

The object of the invention is to create a filling valve that allows the liquid to drip off out of the valve after closing makes impossible, so that those located below the filling valve Parts cannot be contaminated, regardless of whether a drip tray is present or not and regardless of whether the filling valve can be moved laterally or not. In addition, the spraying and

and other foaming agents

liquids

Applicant:

Gustav Ivar Fredrikson,
Tuledet, Vadstena (Sweden)

Representative: Dr.-Ing. H. Dabringhaus, patent attorney,
Düsseldorf 1, Charlottenstr. 58

Gustav Ivar Fredrikson, Tuledet, Vadstena (Sweden), ¹ S has been named as the inventor

spraying can be prevented by the fact that the

ao generation of a concentrated jet of the liquid delivered from the sieve is secured.

According to the invention, the sieves are arranged directly under the valve seat and in the middle by means of Spacer rings kept at a distance from one another, at least the underside of the screen pack being convex is trained. This feature both reduces the weight of the liquid column, which remains between the sieve group and the valve seat with valve body after closing the valve, as well as the effect of the cohesive forces and the surface tension of the liquid is increased, which remains in the sieve pack or in the sieve mesh. This actually gives you a non-dripping one Valve.

In the practical embodiment, the valve seat extends as an annular flange over the expedient convex upper side of the sieve package, the valve body with its outer circumference cooperates with the inner edge of the flange representing the valve seat. The valve body is included ring-shaped and acts with its inner circumference with a central control spindle provided further valve seat together, wherein the control spindle is guided in the sieves and one

4-5 has driver for lifting the valve body from the valve seat in the outlet. Through this expedient Execution, in particular due to the convex shape of the two surfaces of the screen pack, is the liquid jet is concentrated in a conical shape, which prevents splashing.

In the drawing, an embodiment of a valve according to the invention is shown, namely shows

1 shows a vertical center section,

9Ο9 76Ϊ / 55

Fig. 2 is a horizontal section along line H-II of Fig. 1, and

FIG. 3 shows a horizontal section along line IH-III of FIG. 1.

The upper end of the cylindrical housing 2 is closed by a screw cap 4 with a sealing ring 5. The inlet 3 for the milk is provided on one side of the housing, but it is also in the Lid 4 can be installed. At the lower end of the housing is the outlet 6, which is through a annular, as a valve seat? trained flange is formed. The sieve pack 8 is immediately below of the valve seat arranged. This sieve package consists of a fairly large number of close-meshed individual ones Sieves 9 made of wire mesh or the like. Are made. The mesh size of these screens 9 can, for example 1.4 mm. Fourteen individual sieves are provided in the illustration. Every single sieve has one Central opening, and all sieves together are mounted with spacer rings 10 on a Hülseil, which over two arms 12 are connected to a ring 13. The spacer rings 10 are in the middle part of the sieves small spaces are formed, and the upper and lower surfaces of the screen pack 8 are convex in shape. The sieves 9 touch on the circumference and are together with the ring 13 by means of a fastening sleeve 14 on the lower part of the housing 2 with a bayonet lock (Bolt 15 and groove 16) clamped (see Fig. 2).

A control spindle 17 leads through the bore of the Sleeve 11. The lower end of the control spindle 17 is connected to one arm of a two-armed lever 18, which is mounted with its shaft journal 19 on the housing (not shown). The top of the Control spindle 17 carries a ring 20 for guidance in the housing. Part of its length above the Valve seat 7, the control spindle carries the valve body 21. The valve body is disc-shaped and has a central bore with the cross-shaped segment 22 enough passage cross-section for the Releases milk.

In the embodiment shown, the disc-shaped valve body consists of a metal ring which is encased in an elastic material, for example rubber. The rubber part has both a downwardly directed flange 21 a, which seals on the circumference against the valve seat, and an upwardly directed flange 21 δ, which seals against a further valve seat 23. This valve seat 23 is designed as a shoulder on the control spindle 17. The cross-shaped segment 22 is connected directly to the shoulder 23 at the top, while at the lower end it carries a driver 24 through which the valve body 21 can be lifted. This driver can be a wire bracket or a fork (see Fig. 3).

When the control spindle 17 is lifted by the control lever 18, the shoulder 23 is first lifted from the sealing seat 21 &, whereby the central flow opening becomes free. The valve body is then raised by the driver 24, the sealing seat formed by the flange 21 α being opened and the flow around the valve body being free. When the control spindle 17 is moved downwards by the control lever 18, the passage around the valve body closes first and then the central passage through the cross piece.

Because the valve seat is directly above the sieve package 8 is arranged and because between valve

body 21 and sieve pack 8 is only a small distance, the volume and in the closed valve position the weight of the liquid column that remains between the sieve pack 8 and the valve body 21 is very high be low. In addition, because of the large number of individual sieves 9, which means in their middle Spacer rings 10 are kept at a distance from one another and because of the large number of meshes of the individual Sieve the cohesive force and surface tension of the liquid greater than the weight of the said Column of liquid. The risk of milk dripping off and overflowing is also eliminated when the valve housing moves sideways or is exposed to acceleration or deceleration forces will.

As already mentioned, because of the spacer rings 10, the individual sieves 9 form a convex center in their center upper and lower surface of the sieve pack 8. This peculiarity means that the milk flow is increased when it passes through be stronger through the sieve pack in the middle part, while the compression of the sieve discs on the circumference counteracts the milk flow. As a result, the milk stream gets through the valve when filling has a conical shape, and the downwardly directed conical milk jet has a smooth, uniform one Surface. This prevents foam formation as well as spraying and splattering during filling.

Claims (3)

Patent claims: 1. Valve for filling milk or other foaming liquids into vessels, consisting of of a valve housing with a liquid inlet and a downwardly directed liquid outlet, which with one of several superimposed fine-meshed sieves existing sieve package is provided and one above the same has lying valve seat which cooperates with a valve body controllable from the outside, characterized in that the sieves (9) are arranged directly below the valve seat (7) and in the middle by means of spacer rings (10) are kept at a distance from one another, at least the underside of the sieve pack (8) is convex. 2. Valve according to claim 1, characterized in that the valve seat (7) is an annular Flange in over the suitably convex upper side of the screen pack (8) extends, wherein the valve body (21) with its outer periphery with the inner edge of the Valve seat (7) representing flange interacts. . 3. Valve according to claims 1 and 2, characterized in that the valve body (21) is annular is formed and with its inner circumference with one on a central control spindle (17) provided further valve seat (23) cooperates, the control spindle (17) in the sieves (9) is guided and a driver (24) for lifting the valve body (21) from the Has valve seat (7) in the outlet. Considered publications:
German Patent Nos. 322522, 958 623;
British Patent No. 278 099. 1 sheet of drawings © 909769/55 5. «&