VALVE-ACTUATING DEVICE AND METHOD OF SWITCHING OVER A VALVE ARRANGEMENT

Abstract

In the case of a valve-actuating device (1) having a first valve (3) and a second valve (38), it is provided to form, on the first valve (3), a pressure chamber (14), which can be filled with a pressure from a first inflow (16) via a filling opening (15), wherein the first valve (3) separates the first inflow (16), in a closed position, from a first outflow (19), and wherein the pressure chamber (14) can be emptied into the first outflow (19) via an outflow opening (18), and the outflow opening (18) can be opened and closed by a closure element which can be activated by an operating element (2).

Claims

1. A valve-actuating device (1) comprising an operating element (2) and a valve arrangement (41), which is actuatable by the operating element (2), the valve arrangement (41) includes a first valve (3), by which a first inflow (16), in a closed position, can be separated from a first outflow (19) and, in an open position, is connectable to the first outflow (19), and a second valve (38), by which a second inflow (42), in a closed position, is separated from a second outflow (39) and, in an open position, is connectable to the second outflow (39), a switchover device (43), which is actuatable by the operating element (2), is designed to transfer in opposite directions the first valve (3) from the closed position into the open position and the second valve (38) from the open position into the closed position, and vice versa, at least the first valve (3) includes a pressure chamber (14), which is connected to the first inflow (16) via a filling opening (15) and is connectable to the first outflow (19) via an outflow opening (18), the pressure chamber (14) act on a valve element (20) of the first valve (3), said valve element separating the first outflow (19) from the first inflow (16), and the outflow opening (18) is openable and closeable by a closure element (21) which is in operative connection with the operating element (2).

2. The valve-actuating device (1) as claimed in claim 1, wherein the valve element (20) of the first valve (3) is fitted on an elastic membrane (24), which includes a filling opening (15) of the pressure chamber (14) of the first valve (3).

3. The valve-actuating device (1) as claimed in claim 1, wherein the outflow opening (18) of the first valve (3) is larger than the filling opening (15) of the first valve (3).

4. The valve-actuating device (1) as claimed in claim 1, wherein the pressure chamber is a first pressure chamber (14) and the second valve has a second pressure chamber (40), which is connected to the second inflow (42) via a filling opening (15) and is connectable to the second outflow (39) via an outflow opening (18), the second pressure chamber (40) acts on a valve element (20) of the second valve (38), said valve element separating the second outflow (39) from the second inflow (42), and wherein the outflow opening (18) is openable and closeable by a closure element (44) which is in operative connection with the operating element (2).

5. The valve-actuating device (1) as claimed in claim 4, wherein the valve element (20) of the second valve (38) is fitted on an elastic membrane (24), which includes a filling opening (15) of the second pressure chamber (40).

6. The valve-actuating device (1) as claimed in claim 4, wherein the outflow opening (18) of the second valve (38) is larger than the filling opening (15) of the second valve (38).

7. The valve-actuating device (1) as claimed in claim 4, wherein the first inflow (16) and the second inflow (42) are connected to one another or routed separately from one another.

8. The valve-actuating device (1) as claimed in claim 4, wherein the first pressure chamber (14) is sealed in relation to the second pressure chamber (40) by a seal (22) which butts against the closure element (21, 44), or is arranged between two closure elements (21, 44).

9. The valve-actuating device (1) as claimed in claim 4, wherein a control element (4) is in operative connection with the operating element (2), the valve arrangement (41) is actuated by a distal end (5) of the control element (4).

10. The valve-actuating device (1) as claimed claim 9, wherein the control element (4) is arranged, at least in part, in the first or the second outflow (39), the closure element (21, 44) is formed on the control element (4), or the control element (4) is arranged, at least in part, in the first or the second outflow (39) and the closure element (21, 44) is formed on the control element (4).

11. The valve-actuating device (1) as claimed in claim 9, wherein a compensating device (6) is arranged in an operative connection between the control element (4), which actuates the valve arrangement (41), and the operating element (2), said compensating device having a push rod (8), guided in a movable manner in a mount (7), and allowing the operating element (2) to move relative to the control element (4).

12. The valve-actuating device (1) as claimed in claim 1, wherein the operating element (2) is subjected to the action of an operating-element restoring spring (27), which is supported on a housing part (47), and the operating-element restoring spring (27) develops a greater force than a restoring element (9) of a compensating device (6).

13. The valve-actuating device (1) as claimed in claim 1, wherein the operating element (2) is connected to a bi-stable adjustment mechanism (31).

14. The valve-actuating device (1) as claimed in claim 1, wherein the operating element (2) is designed in the form of a manual operating element or is coupled, in the form of a motor-adjustable operating element (2), to a drive (48).

15. The valve-actuating device (1) as claimed in claim 4, wherein the closure element (21, 44) is adjustable between a first position, in which the valve element (20) of the first valve (3) is pushed into a valve seat (26) of the first valve (3), and a second position, in which the valve element (20) of the second valve (38) is pushed into a valve seat (26) of the second valve (38).

16. The valve-actuating device (1) as claimed in claim 4, wherein the switchover device (43) is arranged, in spatial terms, between the first valve (3) and the second valve (38).

17. The valve-actuating device (1) as claimed in claim 4, wherein at least one of the valve elements (20) or membranes (24) of the first valve (3) and of the second valve (38) are at least one of arranged or designed with point symmetry or mirror symmetry in relation to one another in each case.

18. The valve-actuating device (1) as claimed in claim 4, wherein a control element (4) is guided in a movable manner through the valve element (20) of the first valve (3) or of the second valve (38)

19. A method of switching over a valve arrangement (41), wherein the valve arrangement (41) has a first valve (3), with a first pressure chamber (14), and a second valve (38), wherein the first pressure chamber (14) is connected to a first inflow (16) of the first valve (3) via a filling opening (15) and is connectable to a first outflow (19) of the first valve (3) via an outflow opening (18), the method comprising in the first instance closing the outflow opening (18) of the first valve (3), and therefore a pressure built up in the first pressure chamber (14) closes the first valve (3), and the second valve (38) is open, and wherein, upon closure of the second valve (38), the outflow opening (18) of the first valve (3) is opened, and therefore the pressure built up in the first pressure chamber (14) decreases, releasing the first valve (3).

20. The method as claimed in claim 19, wherein the second valve (38) has a second pressure chamber (40), which is connected to a second inflow (42) of the second valve (38) via a filling opening (15) and is connectable to a second outflow (39) of the second valve (38) via an outflow opening (18), the method further comprising, upon closure of the second valve (38), closing the outflow opening (18) of the second valve (38) at about the same time as the outflow opening (18) of the first valve (3) is opened, and therefore a pressure which builds up in the second pressure chamber (40) closes the second valve (38).

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0029] The invention will now be explained in more detail with reference to advantageous exemplary embodiments, although it is not limited to these exemplary embodiments. Further exemplary embodiments can be gathered by combining the features of one or more claims with one another and/or with one or more features of the exemplary embodiments.

[0030] In the drawings:

[0031] FIG. 1 shows a longitudinal section through a valve-actuating device according to the invention, wherein an operating element is arranged in a lower rest position, in which an outflow opening of a first valve is closed and a second outflow opening of a second valve is open,

[0032] FIG. 2 shows the valve-actuating arrangement according to FIG. 1 in an intermediate position of a switchover operation, in which the two outflow openings are open,

[0033] FIG. 3 shows the valve-actuating device according to FIG. 1, wherein an operating element is arranged in an upper rest position, in which the outflow opening of the first valve is open and the second outflow opening of the second valve is closed,

[0034] FIG. 4 shows a further valve-actuating device according to the invention, in the case of which an actuating element is coupled to a drive, in a first switching position, and

[0035] FIG. 5 shows the valve-actuating device according to FIG. 4 in a second switching position.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] FIGS. 1 to 3 show different switching states or switching positions of a valve-actuating device designated as a whole by 1, and will therefore be described together hereinbelow.

[0037] The valve-actuating device 1 has an operating element 2—in this case designed, by way of example, in the form of a manual operating element—by which a valve arrangement 41 can be actuated.

[0038] The valve arrangement 41 here has a first valve 3, which can be opened and closed.

[0039] FIGS. 1 and 2 here show the first valve 3 in the closed state, that is to say in the closed position, whereas FIG. 3 illustrates said first valve 3 in the open state, that is to say the open position.

[0040] By use of the first valve 3, a first inflow 16 can therefore be separated from a first outflow 19 and connected to the first outflow 19.

[0041] The valve arrangement 41 also has a second valve 38, by which a second inflow 42 can be separated from a second outflow 39 when the second valve 38 is closed. The closed position of said second valve 38 is shown in FIGS. 2 and 3.

[0042] The second inflow 42 can be connected to the second outflow 39 by the second valve 38 being transferred into its open position, as FIG. 1 shows.

[0043] A switchover device 43, which will be described in more detail hereinbelow, can thus be used to switch over the valve arrangement 41 between a state according to FIG. 1, in which the first valve 3 is closed and the second valve 38 is open, and a state according to FIG. 3, in which the first valve is open and the second valve 38 is closed.

[0044] The switchover device 43 thus provides for transfer in opposite directions of the first valve 3 from the closed position into the open position and of the second valve 38 from the open position into the closed position, and vice versa.

[0045] The first valve 3 has a pressure chamber 14, which is connected to the first inflow 16 via a filling opening 15.

[0046] This means that a pressure which is present in the inflow 16 can be transferred into the pressure chamber 14 of the first valve 3 via the filling opening 15.

[0047] The first valve 3 also has formed on it an outflow opening 18, via which the pressure chamber 14 can be connected to the first outflow 19, as will be explained in yet more detail hereinbelow.

[0048] The first valve 3 also has a valve element 20, by which the outflow 19 can be closed in relation to the first inflow 16.

[0049] This valve element 20 can be subjected to the action of an internal pressure in the pressure chamber 14 of the first valve 3, in order to separate off the first inflow 16.

[0050] The outflow opening 18 of the first valve 3 can be closed and opened or released by a closure element 21. The closure element 21 here is in operative connection with the operating element 2, and therefore the outflow opening 18 can be closed or released by way of suitable actuation of the operating element 2.

[0051] The first valve 3 also has an elastic membrane 24, which is mounted between a first housing part 23 and a second or further housing part 25. The valve element 20 of the first valve 3 is fitted on the membrane 24. An internal pressure in the pressure chamber 14 therefore moves the valve element 20 in the direction of a valve seat 26 of the first valve 3 or away from the same. Since the internal pressure in the pressure chamber 14 displaces the membrane 24, the position of the first valve can therefore be controlled by pressure in the pressure chamber 14 being altered.

[0052] The already mentioned filling opening 15 is formed on the valve element 20 and therefore the filling opening 15 is moved along with the membrane 24. A cleaning pin 17 penetrates the filling opening 15 without closing it. The movement for opening and closing the first valve 3 causes the cleaning pin 17 to clean the filling opening 15, and so the latter cannot clog up.

[0053] The cleaning pin 17 here is seated on a spring 45, which is secured on the valve element 20.

[0054] Since the outflow opening 18 in the valve element 20 of the first valve 3 has a larger cross-sectional surface area than the filling opening 15 of the first valve 3, there is a reduction in internal pressure in the pressure chamber 14 as soon as the outflow opening 18 is opened by the closure element 21.

[0055] On the other hand, the first valve 3 will close as soon as the operating element 2 activates the closure element 21 to close the outflow opening 18. This is because a water pressure at the inflow 16 will then result, via the filling opening 15, in a buildup of pressure in the pressure chamber 14. This buildup of pressure will ensure that the valve element 20 is pushed into the valve seat 26. This closes the first valve 3.

[0056] As soon as the closure element 21 is removed from the outflow opening 18 by actuation of the operating element 2, the pressure in the pressure chamber 14 decreases and, as result of the water pressure in the first inflow 16, the valve element 20 with the membrane 24 is detached from the valve seat 26, the first valve 3 thus opening.

[0057] The second valve 38 has, in the same way, a second pressure chamber 40, which is likewise connected to a second inflow 42 via a filling opening 15. In an analogous manner, it is also the case that the second valve 38 has an outflow opening 18, via which the second pressure chamber 40 can be emptied into a second outflow 39. The outflow opening 18 here is designed in the form of an annular gap, which is formed between the valve element 20 and the second valve 38 and the control element 4 guided through the valve element 20.

[0058] The functioning of the second valve 38 is analogous to the functioning of the first valve 3, for which reason components and functional units which are the same or identical in functional and/or design terms for the two valves 3, 38 are designated by the same reference signs and are not described separately. What has been said in relation to the first valve 3 therefore applies correspondingly to the second valve 38.

[0059] Here too, therefore, the distal end 5 of the control element 4 has formed on it a closure element 44, which can open and close the outflow opening 18 of the second valve 38 in order to make it possible optionally to decrease or build up an internal pressure in the second pressure chamber 40. When the pressure in the second pressure chamber 40 has been built up, the second valve 38 is closed, since the associated valve element 20 is then pushed into the valve seat 26 of the second outflow 39. When the outflow opening 18 of the second valve 38 is open, in contrast, an internal pressure in the second pressure chamber 40 is decreased, and therefore a water pressure in the second inflow 42 moves the valve element 20 away from said valve seat 26. The second valve 38 is thus opened.

[0060] The closure element 21 of the first valve 3 and the closure element 44 of the second valve 38 are connected rigidly to one another and are formed at the distal end 5 of the control element 4. It is also possible for the closure elements 21, 44 to be designed in the form of a joint closure element.

[0061] In the case of the valve-actuating device 1 of FIGS. 1 to 3, the first inflow 16 and the second inflow 42 are connected to one another to form a joint inflow for the two valves 3, 38.

[0062] A changeover between the position according to FIG. 1 and the position according to FIG. 3 can thus achieve switchover from the joint inflow to one of the two outflows 19, 39.

[0063] The switchover device 43 here is arranged between the first valve 3 and the second valve 38.

[0064] A seal 22 here seals the first pressure chamber 14 in relation to the second pressure chamber 40.

[0065] Overall, the second valve 38 is identical to the first valve 3 and, in particular, is designed with point symmetry in relation to a center point of the seal 22, which is designed in the form of an O ring.

[0066] The operative connection between the operating element 2 and the switchover device 43 is established by the rod-like control element 4 which has already been mentioned.

[0067] Starting from its distal end 5, at which the closure elements 21 and 44 are formed, the control element 4 is guided through the valve element 20 of the second valve 38. The valve element 20 of the second valve 38 here is mounted in a displaceable manner on said control element 4, and therefore a movement of the control element 4 is isolated from a movement of the valve element 20 of the second valve 38.

[0068] After it has passed through the valve element 20 of the second valve 38, the control element 4 runs in the second outflow 39 and exits from the second outflow 39 through a further seal 46.

[0069] At its proximal end 10, the control element 4 is coupled to a compensating device 6.

[0070] The compensating device 6 is located in the operative connection between the operating element 2 and the control element 4 and ensures that the operating element 2 is not obstructed by the closure element 21 stopping against the valve element 20 of the first valve 3. For this purpose, the compensating device 6 has a push rod 8, which is arranged in a mount 7 such that it can be displaced in relation to a restoring force of a restoring element 9.

[0071] It can be seen in FIGS. 1 to 3 that the mount 7 is formed in a non-displaceable manner at the proximal end 10 of the control element 4, that the restoring element 9 is arranged in the mount 7, and that the push rod 8 is fixed on the operating element 2.

[0072] In the case of further exemplary embodiments, the compensating device 6 may also be realized by the push rod 8 being formed at the proximal end 10 of the control element 4, while the mount 7 is fixed to the operating element 2 and can be moved along therewith by being coupled rigidly thereto.

[0073] In the case of further exemplary embodiments, and in particular when the push rod 8 is formed on the control element 4, the restoring element 9 may be formed outside the mount 7. In particular it is possible here for the restoring element 9, that is to say the helical spring illustrated, to be positioned on the control element 4, so as to be supported by the housing part 47.

[0074] The operating element 2, in addition, is subjected to the action of an operating-element restoring spring 27, which is supported at least indirectly on the housing part 47.

[0075] The restoring force of said operating-element restoring spring 27 is greater than the restoring force of the restoring element 9.

[0076] The operating-element restoring spring 27 is designed in the form of a helical spring and engages around the compensating device 6 and parts of the control element 4, in particular the proximal end 10 of the latter.

[0077] The operating element 2 is provided with a bi-stable adjustment mechanism 31 (not illustrated in any further detail). This bi-stable adjustment mechanism 31 is designed in a manner known per se in the form of a push/push locking mechanism, for example of a ballpoint-pen mechanism or of a cardioid mechanism. The bi-stable adjustment mechanism 31 thus makes it possible for a changeover between the switching position according to FIG. 1 and the switching position according to FIG. 3 and back to be achievable by pressure being applied to the operating element 2 along the longitudinal axis 12 of the valve-actuating device 1.

[0078] It should also be mentioned that the push rod 8 can be removed from the mount 7 via a push-rod removal opening 13, which in FIG. 1 is formed above the section plane illustrated, in order for the compensating device 6 to be dismounted or conversely, by virtue of the push rod 8 being introduced, mounted.

[0079] During operation of the valve-actuation device 1, the switchover of the valve arrangement 41 is achieved in that in the first instance, for example in the switching state according to FIG. 1, the first pressure chamber 14 is connected to the joint inflow 16, 42 via the already described filling opening 15 of the first valve 3, wherein in the first instance the outflow opening 18 of the first valve 3 is closed. The pressure imparted from the joint inflow 16, 42 in the first pressure chamber 14 closes the first valve 3 in the manner described. In contrast, in the switching position according to FIG. 1, the second valve 38 is open, since the action of the outflow opening 18 being opened empties the second pressure chamber 40 via the outflow opening 18 of the second valve 38.

[0080] For the purpose of closing the second valve 38, then, the outflow opening 18 of the second valve 38 is closed in that, by virtue of pressure being applied to the operating element 2 and of the following return movement by way of the operating-element restoring spring 27, the upper closure element 44 closes the outflow opening 18 of the second valve 38 and, at the same time, releases the outflow opening 18 of the first valve 3.

[0081] This then gives rise to a pressure building up in the second pressure chamber 40, as result of which the valve element 20 of the second valve 38 is pushed into the valve seat 26 at the second outflow 39. This closes the second valve 38.

[0082] This therefore gives rise briefly to a transition position according to FIG. 2. FIG. 2 therefore shows clearly that the changeover from the second outflow 39 to the first outflow 19 takes place in two steps which proceed more or less at the same time or independently of one another: on the one hand, the second outflow 39 is closed; on the other hand, the first outflow 19 is opened.

[0083] At the same time, in FIG. 2, the pressure in the first pressure chamber 14 is decreased via the outflow opening 18 of the first valve 3, and therefore the valve element 20 with the membrane 24 of the first valve 3 is pushed out of the valve seat 26 at the first outflow 19 as result of the pressure in the inflow 16. This opens the first valve 3, and therefore the situation according to FIG. 3 is present at the end of the switchover operation.

[0084] FIG. 4 and FIG. 5 show a further valve-actuating device 1 according to the invention. Components and functional units which are the same or identical in design and/or functional terms to components or functional units of the exemplary embodiment above are illustrated in a corresponding manner and/or are designated by the same reference signs and are not described separately again. What has been said in relation to FIGS. 1 to 3 thus applies correspondingly to FIG. 4 and FIG. 5.

[0085] FIG. 4 shows the valve-actuating device 1 in a switching position in which the first valve 3 is closed and the second valve 38 is open. In FIG. 5, in contrast, the first valve 3 is open and the second valve 38 is closed.

[0086] The exemplary embodiment according to FIGS. 4 and 5 differs from the exemplary embodiment according to FIGS. 1 to 3 in that the operating element 2 (not illustrated in any further detail) is coupled to a drive 48, and therefore the control element 4 is motor-adjustable. The operating element 2 may be, for example, an actuator of the drive 48 which is known per se.

[0087] Beneath the drive 48, the valve arrangement 1 is designed in a manner corresponding to FIGS. 1 to 3, and therefore repetition will be avoided by referring to what has been said in relation to said figures.

[0088] In the case of the valve-actuating device 1 having a first valve 3 and a second valve 38, the invention thus proposes to form, on the first valve 3, a pressure chamber 14, which can be filled with a pressure from a first inflow 16 via a filling opening 15, wherein the first valve 3 separates the first inflow 16, in a closed position, from a first outflow 19, and wherein the pressure chamber 14 can be emptied into the first outflow 19 via an outflow opening 18, and the outflow opening 18 can be opened and closed by a closure element 21 which can be activated by an operating element 2.

LIST OF REFERENCE SIGNS

[0089] 1 Valve-actuating device

[0090] 2 Operating element

[0091] 3 (First) valve

[0092] 4 Control element

[0093] 5 Distal end

[0094] 6 Compensating device

[0095] 7 Mount

[0096] 8 Push rod

[0097] 9 Restoring element

[0098] 10 Proximal end

[0099] 12 Longitudinal axis

[0100] 13 Push-rod removal opening

[0101] 14 (First) pressure chamber

[0102] 15 Filling opening

[0103] 16 (First) inflow

[0104] 17 Cleaning pin

[0105] 18 Outflow opening

[0106] 19 (First) outflow

[0107] 20 Valve element

[0108] 21 (First) closure element

[0109] 22 Seal

[0110] 23 Housing part

[0111] 24 Membrane

[0112] 25 Further housing part

[0113] 26 Valve seat

[0114] 27 Operating-element restoring spring

[0115] 31 Bi-stable adjustment mechanism

[0116] 38 (Second) valve

[0117] 39 (Second) outflow

[0118] 40 (Second) pressure chamber

[0119] 41 Valve arrangement

[0120] 42 (Second) inflow

[0121] 43 Switchover device

[0122] 44 (Second) closure element

[0123] 45 Spring

[0124] 46 Further seal

[0125] 47 Housing part

[0126] 48 Drive