DE29520377U1 - Gas mixer for mixing two or more gases with simultaneous pressure control, pressure reduction and empty shutdown - Google Patents

Description

QUADiS GMBH

Kartunger Str. 24
76547 Sinzheim, DE

Gas mixer for mixing two or more gases with simultaneous pressure control, pressure reduction and

Idle shutdown

The invention relates to a gas mixer for mixing two or more gases with simultaneous pressure control, reduction and emptying. The gas mixer according to the invention is preferably used when dispensing carbonated beverages.

The invention is based on the task of continuously mixing two or more gases with simultaneous pressure control, whereby the mixing ratio must not change or be able to be manipulated by the operator. Furthermore, the gas mixer must be switched off when one gas is empty.

To solve the problem, a gas mixer according to the characterizing part of claim 1 is proposed. The gas mixer according to the invention produces a mixture that cannot be changed by the operator, with the mixing taking place via standardized orifices in which a fixed mixing ratio is set via the ratio of the orifice holes of the two gas phases to one another.

The empty shutdown is accomplished via a membrane and valve system in the manner according to claim 2, that the low-pressure side gas phase keeps the higher-pressure side at its level.

,la in the drawings will be explained in more detail using the example of preferred embodiments of the gas mixer according to the invention.

In the drawings

Fig. 1

a longitudinal section through a gas mixer according to the invention.

Fig.2

shows a section along the line A-A of Fig. 1.

Fig. 3

shows a basic section through a device for pre-pressure reduction and empty shutdown for the gas mixer according to Figures 1 and 2.

As can be seen from Figures 1 and 2, the gas mixer for mixing two or more gases essentially consists of a housing body 1 as a middle part for the pressure control and mixing chambers and a lower part 2 for the valves and the gas channels.

Two gas connections 3, 3' are provided in the lower part 2, through which the pressure-reduced gases can be supplied. The gas connections lead to two valves 4, 4 ^{' each} with guide pins 5, 5', which are connected to the low-pressure channels 6, only one of which is visible in Fig. 1. The low-pressure channels 6 of the individual gas phases open under the mixing orifices 7 of the respective gas. The mixing orifices 7 are standardized orifices in which a fixed mixing ratio is set via the ratio of the orifice holes of the two gas phases to one another.

Above the mixing orifices 7, mixed gas chambers 8 are provided, the connecting bores 9 leading to the intermediate pressure control chambers 10.

The intermediate pressure regulating chambers 10 and 10' in Fig. 2 are further delimited by membranes 12, 12', on the lower sides of which pressure plates are arranged which are connected to the guide pins 5 and 5 ^' , respectively.

On the top of the membrane 12, 12' there is a slide 13 which is connected via a compression spring to a spring plate 15 which can be moved up and down by a handwheel 17 which penetrates the upper cover plate 16. This makes it possible to adjust the pressure on the slide 13 and thus on the membrane 12, 12'.

By adjusting the handwheel 17, the pressure spring 14 is given a certain preload so that a mixed gas pressure of a corresponding size is regulated. If gas is removed via the mixed gas outlet, the pressure in the intermediate pressure control chamber 9 drops and the pressure spring opens the guide pins 5, 5' of the individual gas phases simultaneously via the two membranes 12, 12' until the set pressure is again present in the mixing orifices 7, in the connecting holes 9 and in the intermediate pressure control chambers 10.

To reduce the pre-pressure and shut off the empty tank, the two outlets 18, 19 of the device according to Fig. 3 are connected to the gas inlets 3, 3'. The pressure reduction device according to Fig. 3 consists of two control chambers 21, 22 arranged in a housing 20, which are delimited by a membrane 23, 24. The control chamber 21 is connected on the high-pressure side via an inlet 25, for example for a CCV gas. The chamber 21 is also connected to the outlet valve 26, which is actuated by the membrane 23, 24 and in turn leads to the outlet 19.

The second high-pressure side inlet 27, for example for an N2 gas, is connected to a valve 28 which is controlled by the membrane 23, 24 in the first control chamber 21. The valve 28 leads to the chamber 22 and to the outlet 18.

The pressure reducer works as follows. If, for example, there is a pressure of 200 bar at the high-pressure connection N2 and a pressure of 60 bar at the high-pressure part CO2, the pressure of 200 bar is regulated to the level of 60 bar for the CO2. In this case, there is a pressure of 60 bar above the membrane 24 of the valve 28 for the N ₂ , whereby the said valve 28 is opened by N ₂ until the pressure below the membrane is the same as above the membrane in the control chamber 21. As a result, the two gases flow at the same pressure into the second, mirror-image pressure regulator, consisting of membrane 24, valve 26 and intermediate chamber 22. The gases flow until the N ₂ pressure falls below 60 bar. From this point on, the falling N ₂ pressure takes over the constant release of the CO 2 in such a way that the N 2 pressure opens via the membrane 23, 24 of the CO 2 valve 26 until the same pressure prevails under the membrane 23, 24 and both gases flow out at the same pressure. This continues until one of the gases is empty. Then an empty shutdown occurs, ie the valve of the other gas is closed.

Claims (1)

QUADLS GMBH PROTECTION CLAIMS Gas mixer for mixing two or more gases with simultaneous pressure regulation, characterized by two gas connections (3, 3 ¹ ) arranged in a housing, which are connected via two valves (4, 4') with spring-loaded guide pins (5, 5 ¹ ) to low-pressure channels (6) of the individual gas phases, which open under the mixing orifices (7) of the respective gas, which have holes corresponding to the mixing ratios, wherein mixing chambers (8) are arranged above the mixing orifices (7), which are connected via connecting holes (9) to at least one, preferably two intermediate pressure control chambers (10, 10'), which are delimited by at least one, preferably two membranes (12, 12'), on one side of which the guide pins (5, 5') for the inlet valves (4, 4') rest and on the other side of which a slide (13) with a compression spring (14) rests, the preload of which is controlled via a handwheel (17) is adjustable. Gas mixer according to claim 1, characterized in that for pressure reduction and emptying the gas connections (3, ³¹ ) are connected to the outlets (18, 19) of two chambers (21, 22), each separated by a membrane (24), the membrane (24) of the first chamber (21) being connected to a valve (28) which controls the supply of gas to the second chamber (22) and the membrane (24) of the second chamber (22) being connected to a valve (26) which controls the supply of gas from the first chamber (21) to the outlet (19).