WO2005040668A2

WO2005040668A2 - Valve

Info

Publication number: WO2005040668A2
Application number: PCT/EP2004/011701
Authority: WO
Inventors: Kurt Wiederkehr
Original assignee: Kurt Wiederkehr
Priority date: 2003-10-22
Filing date: 2004-10-18
Publication date: 2005-05-06
Also published as: WO2005040668A3

Abstract

The invention relates to a valve to be placed on a container, especially on a bottle in which pressure has built up. Said valve comprises a valve housing (1) in which at least one valve seat (23, 24) is provided. A valve seat (23, 24) which is independent of the pressure inside the bottle is located between a plunger (28) and the content of the bottle in a manner so as to be linked with the plunger (28). An accumulator (39) whose force can be varied presses against the other end of the plunger (28). The plunger (28) slides in a cylinder compartment (27) in the valve housing (1), said compartment being closed by a spring housing (34) that comprises an axial stepped bore (35) in which particularly the accumulator (39) whose force can be varied is received. Said accumulator (39) encircles an intermediate piece (36) as the helical spring and is supported on a head (37) of the intermediate piece (36) and on the plunger (28). A plunger compartment (26) upstream of the plunger (28) communicates with an outlet via a bore (42) in the intermediate piece (36), said outlet (51) being provided with a check valve (43).

Description

Valve

The present invention relates to a valve for placing on a container, in particular a bottle, in which a pressure is built up, with a valve housing in which at least one valve seat is provided, with a valve seat independent of the bottle pressure between a piston and the bottle contents Connection is located with the piston, on the other hand, a force accumulator variable in its force presses, and the piston slides in a cylinder space in the valve housing, which is closed by a spring housing which has an axial stepped bore, in which in particular the force changeable energy accumulator is included, the energy accumulator encompassing an intermediate piece as a helical spring and supported on the one hand on a head of the intermediate piece and on the other hand on the piston, with a piston space in front of the Piston communicates with an outlet via a bore in the adapter.

State of the art

In many cases in the private and industrial sector, pressure cylinders made of steel or aluminum are used, which are filled with gases for a specific need. These gases are under a gas pressure of up to 300 bar in the bottle, for example.

As an example, reference is made to the use of these bottles in the beverage industry. For many drinks, a CO2 bottle is used to add CO2 to the drink.

Another essential application is in beverage packaging as protection of the filled beverage until consumption. The addition of a compressed gas prevents the growth of microorganisms.

The same applies to medical gases, for example for the additional oxygen supply to humans. Here, too, the oxygen is delivered in gas bottles under very high pressure. In the inhaler, however, the gas must only have a significantly lower pressure.

As the gas in the bottles, as mentioned above, is under very high pressure, the extraction of the gas still requires expensive reducing systems with flow meters and manometers.

A valve of the type mentioned above is known from DE 101 12 962 A. task

The present invention has for its object to further improve the valve of the type mentioned above, so that it can also be operated with a low opening pressure.

Solution of the task

To solve this problem, the outlet is occupied by a check valve.

The arrangement of this check valve has the advantage that only an extraordinarily low opening pressure of 0.05 kg and below is necessary to open the valve. It is only necessary to overcome the force of the spring, which holds the check valve in the closed position. The pressure at which the piston is located can then already escape.

Next, the non-return valve cone applies pressure to the intermediate piece and thus also the energy accumulator, which in turn presses on the piston, so that the valve seat can be opened towards the bottle contents. Only now does the medium in the bottle flow into the piston chamber, through the piston and through the axial bore in the intermediate piece and through the check valve through the outlet.

According to the present invention, the opening pressure depends exclusively on the pressures of the energy stores, and no longer on the contents of the bottle. This is an essential advantage of the invention.

In a preferred embodiment, for which protection is also sought independently, the coil spring, via which the piston is pressurized, should be adjustable. This is done for the sake of simplicity

Move the spring housing towards the valve housing. For example. is it conceivable that the spring housing can be screwed into a thread of the valve housing. If the spring housing plunges deeper into the valve housing, the pressure on the coil spring and thus on the piston is increased. The position of the spring housing relative to the valve housing is determined by means of a locking bolt.

figure description

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; in its single figure, this shows a longitudinal section through a valve according to the invention for placement on a container.

The valve R according to the invention has a valve housing 1 which, for example, can be screwed into a bottle neck via an external thread 2. An O-ring 3 is provided for sealing against the bottle neck, not shown.

In the valve housing 1 there is a device for filling the container. This device has a filling connection 4, which is closed with a stopper 5. A channel 6 leads from the filling connection 4 to a check valve 7. This check valve 7 has a housing 8 which is screwed into the valve housing 1. In the housing 8 there is a valve body 9 in which an O-ring 10 is provided. The O-ring 10 forms, together with an edge of a recess 11, a valve seat, the recess 11 being connected to the channel 6.

At the other end of the O-ring 10, the valve body 9 is supported against a helical spring 12 which presses the O-ring 10 against the edge of the recess 11 and thus effects the valve seat.

Holes 13 are also provided in the valve body 9, through which the filling medium can flow into the bottle (not shown in any more detail), as indicated by the arrow 14.

In addition to the check valve 7 there is a guide housing 15 which is also inserted into the valve housing 1. This guide housing 15 has a step recess 16 which has openings 17 to the inside of the bottle. These openings 17 are covered by a filter ring 18.

In the step recess 16 there is a plunger 19 which is surrounded by an O-ring 20. On the O-ring 20 is a ring 21 against which a coil spring 22 is supported.

On the other hand, the coil spring 22 engages under a valve cone 23 which is seated in a bore opening 24 of a conical bore 25. This conical bore 25 communicates with a piston chamber 26 in a cylinder chamber 27. A piston 28 slides in the cylinder space 27, supported on the circumferential side by an O-ring 29.

From the valve cone 23, a pressure piece 30 protrudes into the piston 28, which is connected to the valve cone 23 via a plunger 31. This pressure piece 30 closes an oblique bore 32 which can communicate with a relief bore 33. The relief bore 33 is located in a spring housing 34 which is screwed into the valve housing 1 and closes off the cylinder space 27.

A stepped bore 35 is provided in the spring housing 34, which axially penetrates the spring housing 34. Through this stepped bore 35, the oblique bore 32 can communicate with the relief bore 33.

In the stepped bore 35 there is an intermediate piece 36 which bears with a head 37 of an inner shoulder 38 of the stepped bore 35. On the other hand, the inner shoulder 38 presses on the head 37 a helical spring 39 which surrounds the intermediate piece 36 and on the other hand is supported against the piston 28. The helical spring 39 also includes an annular wall 40 which projects from the piston 28 and forms an annular space 41. The intermediate piece 36 slides in the annular space 41, an axial bore 42 leading from the annular space 41 through the intermediate piece 36 to a check valve 43. For this purpose, a check valve cone 45 is located in a valve chamber 44, which is supported towards the intermediate piece 36 via a compression spring 46. It is supported by an O-ring 52 opposite an outlet 51.

The annular space 41 is connected to the piston space 26 by a further oblique bore 49.

The operation of the present valve according to the invention is as follows:

In the normal state, a bottle is filled via the filling connection 4 and the check valve 7 with a medium which is under a predetermined pressure in the bottle. A back pressure specified via the coil spring 39 is to be constantly output over the entire range of the bottle pressure. However, this pressure can be adjusted by rotating the spring housing 34 in the thread 55 in the valve housing 1. When the desired pressure on the spring 39 has been reached, the spring housing is fixed by means of a drive bolt 56, which is only indicated by dashed lines.

The valve cone 23 is under the pressure of the helical spring 22, so that the cylinder pressure does not have an effect here and the control system is stable against the back pressure. The O-ring 20 has the same size as the valve seat 24/23, so that the force that acts on the valve seat by the admission pressure is compensated.

If the outlet 51 is to be opened, the check valve 43 is actuated, for which purpose only a very low pressure of 0.05 kg and below is necessary, since only the pressure prevailing in the system in the piston chamber 26 is constructed. This can escape through openings 53 in the valve cone 45 and the outlet 51.

The valve cone 45 now presses on the intermediate piece 36 and tensions the coil spring 39, which acts on the piston 28. The piston 28 presses on the pressure cone 30 and the tappet 31 on the valve cone 23, so that gas can flow into the piston chamber 26 through the openings 17 via the valve seat 23/24 and the bore 25.

The gas continues to flow through the oblique bore 49 into the annular space 41, through the axial bore 42 and from there through the check valve 43 from the outlet 51.

If the internal pressure is too high, sufficient pressure is built up under the piston 28, which counteracts the force of the prestressed spring 39, so that the opening on the valve seat 23/24 is reduced. As a result, the pressure on the piston 28 decreases again, so that the force of the coil spring 39 predominates again and the valve seat 23/24 is opened again. As a result, the control system is balanced. Only when the check valve 43 closes the outlet 51 is the valve seat 23/24 finally closed.

The safety valve seat, which is formed by the pressure piece 30 and the oblique bore 32, is also important in the present case. If, for example, the valve cone 23 and / or the valve seat 23/24 is leaking, the gas flows under the piston 28, which moves against the helical spring 39. Characterized the pressure piece 30 is lifted from the plunger 31 so that leakage gas can flow out through a bore 54 in the pressure piece 30 and the oblique bore 32 into the stepped bore 35 of the spring housing 34 and via the relief bore 33.

Claims

Patent claims

1. Valve for placing on a container, in particular on a bottle, in which a pressure is built up, with a valve housing (1) in which at least one valve seat (23, 24) is provided, with a valve seat (23 , 24) is located between a piston (28) and the contents of the bottle in connection with the piston (28), on the other hand, a force accumulator (39) with variable force is pressed on the piston (28) and the piston (28) in a cylinder space (27) slides in the valve housing (1), which is closed by a spring housing (34) which has an axial stepped bore (35), in which in particular the force accumulator (39), whose force can be changed, is accommodated, the force accumulator (39 ) surrounds an intermediate piece (36) as a helical spring and is supported on the one hand on a head (37) of the intermediate piece (36) and on the other hand on the piston (28), a piston chamber (26) in front of the piston (28) via a bore (42 ) in the intermediate piece 836) is connected to an outlet,

characterized,

that the outlet (51) is occupied by a check valve (43).

2.. Valve for placing on a container, in particular on a bottle, in which a pressure is built up, with a valve housing (1) in which at least one valve seat (23, 24) is provided, with a valve seat (23, 24 ) is located between a piston (28) and the contents of the bottle in connection with the piston (28), on the other hand a force accumulator (39) whose force can be changed presses on the piston (28), and the piston (28) in a cylinder space (27 ) slides in the valve housing (1), which is closed by a spring housing (34)

BPSW'GUNGS;? 0PIE is, which has an axial stepped bore (35), in which in particular the force accumulator (39) which is variable in its force is accommodated, the energy accumulator (39) as a helical spring encompassing an intermediate piece (36) and on the one hand on a head (37) of the Intermediate piece (36) and on the other hand supported on the piston (28), a piston chamber (26) in front of the piston (28) being connected to an outlet via a bore (42) in the intermediate piece 836), characterized in that the spring housing (34) for adjusting the force of the coil spring (39) relative to the valve housing is movable.

3. Valve according to claim 2, characterized in that the spring housing (34) meshes with an external thread, an internal thread (55) in the valve housing (1) and, if necessary, can be fixed in a specific position by a locking bolt (56).

4. Valve according to one of claims 1 to 3, characterized in that in the valve chamber (44) a compression spring (46) is supported against a check valve plug (45) which on the one hand closes the outlet (51) and on the other hand the intermediate piece (36) pressurized.

5. Valve according to at least one of claims 1 to 4, characterized in that the intermediate piece (36) slides sealed in an annular space (41) which is formed by an annular wall (40) projecting from the piston (28).