DE20106217U1 - Two-way valve - Google Patents

Description

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BERENDT,'LEYHT& HERING

Patent Attorneys · European Patent and Trademark Attorneys

Dr. rer. nat. Dipl.-Chem. Thomas Berendt Dr.-Ing. Hans Leyh
Dipl.-Ing. Hartmut Hering

Innere Wiener Strasse 20
D-81667 Munich

Telephone: (089) 4 48 43 49
Facsimile / Fax: (089) 4 48 43 84 E-mail: H.Hering@IDpat.DE

MU-143-GM

GEMÜ Gebrüder Müller Apparatebau GmbH & Co. KG

Fritz-Müller-Strasse 6-8

D-74665 Ingelfingen

Straight-through valve

55 β 5?

Straight-through valve

Description

The innovation concerns a through-valve, in particular for liquid and gaseous media, with a valve housing, a valve element, an inlet connection and an outlet connection.

Known valves of this type have an inlet connection and a separate outlet connection, and corresponding lines, i.e. an inlet line and a drain line, are connected to the two connections.

This design is structurally complex and requires a lot of space.
The innovation is therefore based on the task of designing a valve of the above-mentioned type in a structurally simple and more compact manner, while reducing the space required for the valve.

According to the innovation, this is achieved by the inlet connection and the outlet connection being designed in the form of a double pipe.

Preferably, the two pipes are concentric in the connection area of the valve.

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Advantageously, the valve element, which is designed as a membrane, for example, seals the inner tube, the transition from the inner to the outer tube and the entire medium-carrying space of the valve to the outside.

An example embodiment of the innovation is explained using the drawing, in which

Fig. 1 shows in section the valve according to the innovation in the closed position,

Fig. 2 shows the valve according to Figure 1 in the open position,

Fig. 3 shows another embodiment of the valve in the closed position.

The valve 10 according to Figure 1 generally has a housing 12 which is formed from an upper housing part 14 and a lower housing part 16. The two housing parts 14 and 16 are firmly connected to one another by means of a union nut 18, but other types of connection are also possible, for example a clamp closure or a bayonet closure.

A pressure piece 20 is installed in the housing 12 so as to be movable axially along the central axis of the valve. A valve element in the form of a membrane 22 is connected to the pressure piece 20, with a central, unspecified pin of the membrane being received in a central bore of the pressure piece 20, also unspecified.

The membrane 22 is coupled, for example, via a bayonet connection 26 to a spindle 24 which has an external thread 28 which cooperates with a corresponding internal thread of the upper housing part 14.

The spindle 24 extends outward through the upper housing part 14, and on its outer end, which may be in the form of a square 30 or

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The handwheel 32 is arranged on the spindle 24 via the square 30 and is connected in a rotationally fixed manner to the spindle 24.

By turning the handwheel 32, the spindle 24 and with it the pressure piece 20 and the diaphragm 22 can be moved axially up and down, whereby the valve can be opened and closed.

Figure 1 shows the valve in the closed state, with the flow direction indicated by an arrow P1.

Figure 2 shows the valve in the open position, with the flow direction indicated by the arrows P2.

As can be seen from the drawing, the valve can be operated in both flow directions P1 and P2.

The inlet connection and the outlet connection of the valve 10 (which are reversible as described above) are designed in the form of a double tube which is formed from an outer tube 34 and an inner tube 36. The outer tube 34 is firmly connected to the housing base 16, for example welded thereto.

The inner tube 36, which runs concentrically to the outer tube 34 in the connection area of the valve, penetrates the outer tube 34 in a bent area 46 of the latter and is firmly connected, for example welded, to the outer tube 34 along the penetration line.

At its valve-side end, the inner tube 26 is connected to a tubular nozzle 38, for example welded to it, which is formed in one piece with the housing lower part 16 and is connected to it via radial webs 48

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The housing base 16, the webs 48 and the tubular nozzle 38 thus form a single component.

The nozzle 38 has an end face facing the diaphragm 22, which forms the shut-off edge 40, i.e. the valve seat.

In Figure 1, the valve is closed, i.e. the membrane 22 is pressed tightly against the shut-off edge 40 by the pressure piece 20. This blocks the connection from the inner tube 36 to the outer tube 34. The membrane 22 is clamped between the lower housing part 16 and the upper housing part 14 along its outer edge 44.

If the valve is now opened by turning the handwheel 33, the medium flows, depending on the inflow direction, from the inner pipe 36 to the outer pipe 34 or, as Figure 2 shows, from the outer pipe 34 around the shut-off edge 40 into the inner pipe 36.

Since the membrane 22 is clamped sealingly between the housing parts 14 and 16 along its outer edge 44, the entire space of the valve carrying the medium is sealed to the outside in the open position according to Figure 2.

In the closed valve position according to Figure 1, the inner tube 36 is also blocked against the valve chamber and the transition from the inner tube 36 to the outer tube 34.

In the embodiment of the valve according to the innovation shown in Figure 3, as in the embodiments according to Figures 1 and 2, the outer tube 34 is welded to the lower housing part 16. The inner tube 36, however, together with the webs 48 and a cylindrical head part 50, forms a single component, the head part 50 lying radially between the upper housing part 14 and the lower housing part 16 and is pressed axially by the latter via a shoulder 66 against the membrane 22 and against the upper housing part 14.

A seal, for example an O-ring 52 or 54, is installed between the upper housing part 14 and the head part 50 and also between the latter and the lower housing part 16.

In the embodiment according to Figure 3, the inner tube 36 is not welded to the outer tube 34 at the point of passage, but is only pushed through the latter. However, as Figure 3 shows, the section 56 of the inner tube 36 which projects beyond the outer tube 34 is enclosed by a cylindrical sleeve 58 which in turn is connected, for example welded, to the outer tube 34 along its contact edge 60.

A seal, for example an O-ring 62, is installed between the sleeve 58 and the inner tube 36 in the region of the front end of the sleeve 58.

When assembling or disassembling the valve according to Figure 3, the inner tube 36 can therefore be pulled axially out of the outer tube 34 with the upper housing part 14 removed or pushed into it during assembly, whereupon the upper housing part 14 is then placed on and connected to the lower housing part 16.

The free end of the sleeve 58 is provided with an external thread 64, onto which a cap (not shown) can be screwed when the inner tube 36 is pulled out, thus closing the opening of the sleeve 58.

The double pipe design of the new valve offers technical and economic advantages. The valve can be manufactured from commercially available pipe parts (fittings) in a welded construction. This means that different nominal widths can be combined with one another. It enables a small, compact design, particularly in series installation, and it has a high KV value. Another advantage is that it can be used in both flow directions.

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The shut-off device can conveniently be a membrane made of PTFE, FPM, EPDM, metal or other materials.

Due to the design principle, the valve can be directly integrated into plant piping systems. It can also be completely emptied very easily and can therefore be used with particular advantage in the organic sector.

The valve can be operated manually, but also by means of a pneumatic, electric motor or electromagnetic drive.

Claims (4)

1. A through-valve, particularly for liquid, gaseous, neutral and aggressive media, with a valve housing, a valve element, an inlet connection and an outlet connection, characterized in that the inlet connection and the outlet connection are designed in the form of a double pipe ( 34 , 36 ). 2. Valve according to claim 1, characterized in that the two tubes ( 34 , 36 ) are arranged concentrically in the connection area of the valve ( 10 ). 3. Valve according to claim 1 or 2, characterized in that the inner tube ( 36 ), the transition from the inner to the outer tube ( 34 ) and the entire medium-conducting space of the valve ( 10 ) can be sealed to the outside by the valve element designed, for example, as a membrane ( 22 ). 4. Valve according to one of the preceding claims, characterized in that the inner tube ( 36 ) is firmly connected at its valve-side end face to a tubular nozzle ( 38 ), the end face of which facing the membrane ( 22 ) forms a shut-off edge ( 40 ).