WO2009101188A1

WO2009101188A1 - Blending valve and device for treating liquids

Info

Publication number: WO2009101188A1
Application number: PCT/EP2009/051731
Authority: WO
Inventors: Jochen Zöller
Original assignee: Brita Gmbh
Priority date: 2008-02-14
Filing date: 2009-02-13
Publication date: 2009-08-20
Also published as: DE102008001635A1; WO2009101188A9

Abstract

A blending valve is described comprising at least one inlet channel 10a, b and at least two outlet channels 20a, b and comprising a control member 30 for adjusting flow cross sectional areas. The control member 30 comprises a control means 40, 50 between the inlet channel 10a, b and each outlet channel 20a, b, wherein the control means 40, 50 are coupled together such that when the control member is adjusted the total of the flow cross sectional areas A, B is constant. Also described is a device for treating water using such a blending valve.

Description

Blending valve and device for the treatment of

liquids

The invention relates to a Verschneideventil with at least one input channel and at least two output channels and with an actuator for adjusting flow cross sections. The invention also relates to a device for the treatment of liquids using such Verschneideventils.

Intersection valves are used where fluids are subject to treatment, e.g. a filtration, and where there is a need to add a portion of the untreated liquid to the treated liquid, or where Teüströme the water should be treated differently. In particular, in the filtration of water, which may have different water hardness, it is desirable to adjust the proportion of waste so that a certain water hardness is achieved.

Pressure-driven water filters are used in particular in the catering industry to supply, for example, coffee machines. It is necessary that the water is supplied to the coffee machine with a certain pressure. It must therefore be ensured that the water pressure at the consumer remains constant when the proportion of waste is changed.

From DE 196 48 405 A1 a filter device with a Verschneideeinrichtung is known, which is shown schematically in Fig. 1 and which is connected to a container 60 having the filter material. There is a supply line 80 and a drain line 84 and a supply line and the drain line connecting bypass line 82 is provided, in which a metering valve 70 is arranged. The supply line 80 and the drain line 84 are over Connecting lines 90, 92 connected to the container 60. The metering valve 70 allows a specifically adjustable Verschneid tion of filtered and unfiltered water in the drain line 84, where the two liquid streams are brought together.

When the metering valve 70 is closed, the entire raw water supplied flows through the container 60. As soon as the metering valve 70 is opened, while maintaining the flow cross-section in the first connecting line 90, an additional portion of unfiltered water is added to the filtered water supplied via the second connecting line 92, with the result that that changes the water pressure behind the filter device and thus in front of the consumer, for example in front of the coffee machine. This means that the pressure drop Δ _P between the two drawn in lines 80 and 84 measuring points changed.

It is therefore necessary to take additional measures if the pressure drop should be kept constant.

From DE 199 58 648 A1 a water filter device is known, which has a filter head, in which a separating device is provided for dividing the raw water into two partial streams. Each partial flow passes through a different filter section.

The diversion of a partial flow of the raw water flow supplied is possible via a valve, wherein the ratio of main flow to partial flow is arbitrary selectable. It is envisaged that both the total amount of water flowing through the filter and the amount of the individual partial flows or the ratio of partial flow to main flow to one another are detected. For this purpose, volumetric flow meters in the form of cell or vane wheels are arranged in the filter head. Also in this device, the Pressure conditions at the outlet when changing the proportion of waste influence.

It is therefore an object of the invention to provide a blending valve that allows a pressure-independent intersection. It is also an object of the invention to provide a device for the treatment of water, wherein the pressure drop across the device is not changed when changing the proportion of waste.

This object is achieved with a blending valve having at least one input channel and at least two output channels and with an actuator for adjusting flow cross sections, wherein the steep member between the input channel and each output channel each having an adjusting means for adjusting each of a flow cross-section and wherein the adjusting means are coupled together in that the sum of the flow cross sections is constant when adjusting the actuator.

It has been found that a pressure-independent intersection can be achieved if the sum of the flow cross-sections during the adjustment of the Verschnittanteiis and thus when adjusting the blending valve remains constant.

The blending valve may have a plurality of input channels and a plurality of output channels, which are interconnected via the Steliorgan and the associated actuating means. Pressure changes do not occur in an adjustment of the Steliorgans the Verschneideventils if the sum of the flow cross sections, in particular of all output channels is kept constant.

Preferred are two embodiments. The first embodiment of the intersecting valve provides an input channel and two output channels. The inflowing liquid is divided within the blending valve into two sub-streams, which must pass through the two actuating means of the actuator.

The second embodiment of the blending valve provides for two input channels and two output channels. The input channels and any upstream flow divider are preferably designed so that each 50% of the total flow rate are introduced via each input channel in the blending valve.

Each input channel is connected via its own means with one output channel each.

The slipping means preferably cooperates with the inlet opening of the outlet channel. This embodiment of the Verschneideventiis is particularly suitable for the first embodiment described above.

A second embodiment provides that the adjusting means preferably cooperates with the outlet opening of the inlet channel. This embodiment is particularly suitable for use in the second embodiment of the Verschneideventils.

Preferably, the adjusting means are arranged in opposite directions. The adjusting means may for example be identical, but they should be arranged in opposite directions to keep the sum of the flow cross sections constant. The adjusting means are designed and arranged such that when an adjusting means reduces the relevant flow cross-section, the other slipping means increases the relevant other flow cross-section by the same amount. The adjusting means is preferably a collar. The adjusting ring can have a different width along its circumference. The corresponding opening section of the input channel or of the output channel is thus enlarged or reduced via the corresponding adjusting ring section.

According to a further embodiment, instead of a different width adjusting ring and a collar with a slot can be used, which has a different width along the circumference of the ring.

Both the width of the adjusting ring and the width of the slot can change continuously or stepwise.

So that the actuating means can be adjusted by the same amount when operating the Verschneideventils, preferably, a coupling means is provided, on which the adjusting means are arranged.

According to a first embodiment, the coupling means may be a connecting bolt. At such connecting bolts, the adjusting rings can be plugged and rotatably arranged or molded, for example.

According to a further embodiment it is provided that the coupling means comprises gears. The gears are each associated with an adjusting means, in particular a setting ring, and are preferably located in a common plane. This makes it possible that the gears mesh with each other, which can be done directly or indirectly. When using z. B. bevel gears can be realized any applications of actuators and orientations of channels.

The device for treating liquids comprises a container having a treatment material and a connection device, which comprises a first connection line for the supply of liquid, a second connection line for the discharge of treated liquid and a bypass line and a blending valve. The blending valve is arranged at the branching point of the first connecting line and bypass line and when adjusting the Verschneideventiis this changes the flow cross sections to the bypass line and the first connecting line such that the sum of the flow cross sections remains constant.

In this device, a prescribed blending valve is used.

The flow cross sections can be set at the input or the inputs and / or outputs of the Verschneideventils.

The bypass line, which begins at the blending valve, can either be passed outside of the container or passed through the container. In the second case, the bypass line may also comprise another treatment material or to a chamber, for. B. lead in the container in which z. B. is another treatment material.

For this purpose, the container of the device preferably has two chambers, wherein the one chamber z. B. a filter material F _1st and wherein the second chamber to which the bypass line leads either does not contain any filter material or has another filter material F ₂ . In this embodiment, the two partial streams are preferably combined within the device, in particular within the container and discharged together via the second connecting line.

According to a further embodiment, the at least two chambers are fluidly connected in series. This opens up the possibility that one of the chambers is flowed through by both partial flows, while the other chamber is only flowed through by a partial flow. This embodiment can then be used, for example, if the filtered water is to be subjected to an aftertreatment, whereby the unfiltered water, which is passed through the bypass line, to be exposed to this treatment. The downstream chamber is thus flowed through by both partial streams.

Exemplary embodiments of the invention are explained in more detail below with reference to the figures. Show it:

Fig. 1 is a schematic representation of an apparatus for

Treatment of liquids according to the prior art,

2a, b, c three embodiments of a treatment device with a blending valve according to the invention in a schematic representation,

3 shows a section through such a blending valve according to a first embodiment, 4 shows a section through such a blending valve according to a second embodiment,

Fig. 5 is a partial section through such a Verschneideventil according to a third embodiment and

Fig. 6 is a diagram for illustrating the pressure drop in a change of the waste portion.

In Fig. 2a, a device for the treatment of liquids is shown, which comprises a container 60 with treatment material, for. B. filter material includes. The container 60 is supplied from a feed line 80 via the blending valve 1 and the first connecting line 90 untreated liquid. The treated liquid is supplied via the second connecting line 92 to a drain line 84. Between the blending valve 1 and the drain line 84, the bypass line 82 is provided. The connection of the lines 82, 84 and 92 via a T-connection 86th

The blending valve 1 is thus at the branching point between the supply line 80, the first connecting line 90 and the Bypassieitung 82. According to the lines 80, 82 and 90, this blending valve 1, an input channel 10a and two output channels 20a, b, as exemplified in the Fig. 3 is shown in section.

In Fig. 2a, two pressure measuring points in the Zulaufieitung 80 and in the discharge line 84 are provided. The pressure drop Δ _P is determined between these two measuring points.

FIG. 2b shows a further embodiment, which differs from the embodiment shown in FIG. 2a in that in that the feed intake 80 branches, so that the drafting valve 1 has two input channels 10a, b and two output channels 20a, b.

A blending valve 1 according to this embodiment is exemplified in FIG. 4. Another embodiment, which also has two input channels 10a, b and two output channels 20a, b, is shown in FIG. 5.

FIG. 2c shows a further embodiment of the device, which differs from that in FIG. 2a in that the container 60 has two chambers 62 and 64 in which different treatment materials are located. The

Connecting line 90 opens into the chamber 62, which contains a filter material.

The bypass line 82 is passed through the container 60 of the filter device to the second chamber 64, which contains another treatment material, such as e.g. Activated carbon has.

A portion of the chamber 64 is fluidly connected downstream of the chamber 62, so that the liquid flowing through the chamber 62 can additionally be subjected to further treatment in the chamber 64 after the filtering process. The unfiltered water brought about via the bypass line is likewise exposed to the treatment by the activated carbon. Both partial flows are thus merged in the chamber 64.ln the second connection line 92, which thus also forms the drain line 84, the mixture of two partial streams is discharged together.

The blending valve 1 according to FIG. 2a can also be connected to such a device according to FIG. 2c. In Fig. 3, a blending valve 1 is shown, which has a Ventiikörper 2, in which an input channel 10a and two output channels 20a, b are arranged. The input channel 10a is connected to the two output channels 20a, b via an actuator 30, which has adjusting means 40 and 50. The adjusting means 40 and 50 are designed as first and second adjusting ring 42, 52 and arranged in front of the inlet openings 22a, b of the two output channels 20a, b. At the output port 12a of the input channel is no Steliring, so that the incoming raw water can flow freely into the receiving chamber 31 of the actuator 30.

The two adjusting rings 42, 52 are arranged on a coupling means 34 in the form of a connecting bolt 36. The first adjusting ring 42 may be an integral part of the connecting bolt 36, while the second adjusting ring 52 is preferably attached to the connecting bolt and rotatably connected thereto. Upwards, the connecting pin 36 terminates in an actuating portion 32, which is formed as a hexagon socket, on which a corresponding key for adjusting the actuator 30 can be recognized. The actuator 30 is held mitteis a closure element 3. Below the closure element 3, a seal 5 for sealing the Verbindungsboizens 36 opposite the Ventiikörper 2 is provided.

Each skirt 42, 52 has a non-profiled and a profiled face. The first stop ring 42 has an unprofiled upper end face 44 and a profiled lower end face 46 provided with steps 47. This gives the first skirt 42 a varying width over its circumference, allowing the cross section A of the entrance opening 22a of the exit channel 20a to increase or decrease depending on the rotational position of the adjusting ring. In the same way, the second skirt 52 is formed. The lower end face 56 of the second adjusting ring 52 is unprofiled and the upper end face 54 is profiled and executed with steps 57. The operation of the second Steürings 52 upon rotation of the slipper 30 corresponds to that of the first adjusting ring 42, but with the difference that when the first collar increasingly closes the inlet opening 22a of the output channel 20a, the lower second skirt increases the inlet opening 22b of the output channel 20b opens. The flow cross-section B of the inlet opening 22b is reduced. Overall, it is achieved that the sum of the flow cross sections A and B of the inlet openings 22a, b of the outlet channels 2Oa ₁ b remains constant.

FIG. 4 shows a further embodiment in which two input channels 10a and 10b are arranged in the valve body 2. Further, two output channels 20a, 20b are provided, which are arranged at right angles to each other. Between the input channels 10a, b and the output channels 20a, b, in turn, a clapper 30 is arranged, which also has a connecting pin 36 as a coupling means 34, an actuating portion 32 and two slants 40 and 50. In the embodiment shown here, the adjusting means, which are also designed as adjusting rings 42, 52, each have a slot 48, 58th

The slit width changes continuously along the circumference. Here, the two collars or the contactors of the two adjusting rings are arranged such that upon rotation of the actuator 30 of the output port 12a facing portion of the slot 48 widens, while the output port 12b facing portion of the slot 58 is reduced. As a result, the constant maintenance of the sum of the flow cross sections A and B is achieved. The water flowing into the stirrups 42, 52 flows in each case down from the space between the collars and the connecting boge 36 and passes from there into the respective associated output channels 20a, 20b.

FIG. 5 shows a further embodiment which likewise has two input channels 10a, b and two output channels 20a, b. As adjusting means 40, 50 are located between the input and output channels each adjusting rings 42, 52, the z. B. may correspond to the embodiments shown in Fig. 3 and Fig. 4, respectively. At the top of the collars 34 gears 38a, b are arranged as coupling means. The gears 38a, b are in a common plane and interlock. When the slender is rotated on the operating portion 32, the adjusting ring 42 is moved. By coupling to the associated gear 38a, the second gear 38b is rotated in opposite directions, which in turn is connected to the second adjusting ring 52. In this way, the second adjusting ring 52 is rotated in opposite directions to the first Steliring 42, so that a constant arrangement of the sum of the flow cross-sections A, B is achieved with a corresponding arrangement of the ring width and the shooter.

A measurement of the pressure drop according to the illustrations in FIGS. 2a and 2b using the blending valve 1 according to the invention, as shown in FIG. 6, shows that the pressure drop .DELTA.p is constant as a function of the proportion of waste. In the prior art according to the embodiment of FIG. 1 results in a falling straight line (shown in dashed lines). LIST OF REFERENCE NUMBERS

1 blending valve

2 valve body

3 closure element 5 seal

10a, b input channel

12a, b exit opening

20a, b output channel

22a, b entrance opening

30 actuator

31 receiving chamber

32 operating section

33 bolts

34 coupling agent

36 connecting bolts

38 a, b gearwheel

40 First actuating means

42 First collar

44 Upper face

46 Lower face

47 level

48 slot

50 Second actuating means

52 second collar

54 Upper face

56 Lower face

57 level 58 slot

60 containers

62 chamber

64 chamber

70 metering valve

80 supply line

82 bypass line

84 drain line

86 T connection

90 First connection cable

92 Second connecting cable

A flow cross section

B flow cross section

Claims

claims

1. blending valve with at least one inlet channel (10a, b) and with at least two outlet channels (20a, b) and with an actuator (30) for setting flow cross sections,

wherein the actuator (30) between the input channel (10a, b) and each output channel (20a, b) each have an adjusting means (40, 50) for adjusting a respective flow cross-section (A, B), and

wherein the adjusting means (40, 50) are coupled to each other such that when adjusting the actuator (30), the sum of the flow cross-sections (A, B) is constant.

2. blending valve according to claim 1, characterized in that an input channel (10 a) and two output channels (20 a, b) are provided.

3. blending valve according to claim 1, characterized in that two input channels (10a, b) and two output channels (20a, b) are provided.

4. blending valve according to one of claims 1 to 3, characterized in that the adjusting means (40, 50) with the inlet opening (22 a, b) of the output channel (20 a, b) cooperates.

5. blending valve according to one of claims 1 to 3, characterized in that the adjusting means (40, 50) with the output port (12a, b) of the inlet channel (10a, b) cooperates.

6. Verschneideveπtil according to one of claims 1 to 5, characterized in that the slipping means (40, 50) are arranged in opposite directions.

7. blending valve according to one of claims 1 to 6, characterized in that the Stellmitte] (40, 50) is a collar (42, 52).

8. blending valve according to claim 7, characterized in that the adjusting ring (42, 52) along its circumference has a different width.

9. blending valve according to one of claims 7 or 8, characterized in that the adjusting ring (42, 52) has a contactor, which has a different width along the circumference of the ring.

10. blending valve according to one of claims 8 or 9, characterized in that the width of the adjusting ring (42, 52) or the slot (48, 58) changes continuously or stepwise.

11. blending valve according to one of claims 1 to 10, characterized in that the control center! (40, 50) are arranged on a coupling means (34).

12. blending valve according to claim 11, characterized in that the coupling means (34) is a connecting pin (36).

13. blending valve according to claim 11, characterized in that the coupling means (34) gears (38 a, b).

14.Verschneideventil according to claim 13, characterized in that the gears (38 a, b) engage directly or indirectly in one another.

15. Device for the treatment of liquids with a treatment material having container (60), with a first connecting line (90) for the supply of liquid, a second connecting line (92) for the discharge of treated liquid, a bypass line (82) and with a Blending valve (1), characterized in that the blending valve (1) is arranged at the branch point of the first connecting line (90) and bypass line (82) and

that when adjusting the Verschneideventils (1) this, the flow cross sections (A, B) to the bypass line and to the first connecting line (90) changed such that the sum of the flow cross sections A, B remains constant.

16. The apparatus according to claim 15, characterized in that the Verschneideventil (1) at least one input channel (10 a, b) and at least two output channels (20 a, b) and an actuator (30) for adjusting flow cross-sections, wherein the Steliorgan (30 ) between the input channel (10a, b) and the output channel (20a, b) each have an adjusting means (40, 50) for adjusting a respective flow cross-section (A ₁ B) and wherein the adjusting means (40, 50) are coupled together such that when adjusting the steep member (30), the sum of the flow cross-sections (A, B) is constant.

17. The apparatus of claim 15 or 16, characterized in that the bypass line (82) outside of the container (60) is passed.

18. The apparatus of claim 15 or 16, characterized in that the bypass line (82) through the container (60) is guided.

19. Device according to one of claims 15 to 18, characterized in that the container (60) has at least two chambers (62, 64) with different treatment material, wherein a chamber (64) to the bypass line (82) is connected.

20. The apparatus according to claim 19, characterized in that the at least two chambers (62, 64) are fluidically connected in series.