FILLING DEVICE

Abstract

A filling device for filling containers with liquid product includes a valve that is arranged in a product channel thereof. The valve comprises a valve element that is arranged in the product channel and a valve seat that surrounds the valve element to form the valve. The valve element and valve seat can be adjusted relative to each other. Length-adjustable connectors connect the valve seat to the product channel on both sides of the valve seat.

Claims

1. An apparatus comprising a filling device for filling containers with liquid product, wherein said filling device comprises a product supply and a product channel connected to said product supply, wherein said product channel opens into a dispensing opening, wherein said filling device further comprises a valve that is arranged in said product channel, wherein said valve is a filling-and-regulating valve, wherein said filling device further comprises a flowmeter that is arranged either upstream or downstream of said valve, wherein said filling device further comprises a gas barrier is arranged in a region of said dispensing opening, and wherein said valve comprises a valve element that is arranged in said product channel and a valve seat that surrounds said valve element to form said valve, wherein an adjustment setting of said valve element and said valve seat relative to each other is controllable, wherein said valve seat is adjustable along an axial direction of said product channel, wherein said filling device further comprises connectors that connect said valve seat to said product channel, wherein said connectors are length-adjustable, and wherein said connectors are arranged on both sides of said valve seat.

2. The apparatus of claim 1, wherein a pair of folding bellows forms said connectors, wherein said pair of folding bellows forms part of a wall of said product channel.

3. The apparatus of claim 2, wherein said pair of folding bellows comprises polytetrafluoroethylene.

4. The apparatus of claim 2, wherein a wall element forms both said pair of folding bellows and said valve seat and wherein said wall element is an integrated flexible wall element.

5. The apparatus of claim 1, wherein said valve has a controllable cross-sectional area.

6. The apparatus of claim 1, wherein said flow meter comprises a magnetically inductive flow meter (28).

7. The apparatus of claim 6, wherein said flowmeter surrounds said product channel.

8. The apparatus of claim 1, further comprising a valve rod, wherein said valve rod holds said valve element in said product channel.

9. The apparatus of claim 8, wherein said valve rod is secured in said product space.

10. The apparatus of claim 1, further comprising a valve cone, wherein said valve cone forms said valve element.

11. The apparatus of claim 1, wherein said axial adjustment of said valve in said product channel is controllable.

12. The apparatus of claim 11, wherein said filling device further comprises a spring and a rest stop, wherein said spring pre-tensions said valve seat against said rest stop.

13. The apparatus of claim 1, further comprising a filling machine, wherein said filling device is one of a plurality of filling devices on said filling machine.

14. The apparatus of to claim 13, wherein said filling machine comprises a link control arrangement for actuating an actuator of each filling device.

15. The apparatus of claim 14, wherein said flowmeter is configured to provide an output signal and wherein deflection of one of said valve seat and valve element is controlled as a function of said output signal.

16. The apparatus of claim 2, wherein said folding bellows are coated with polytetrafluoroethylene.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The invention is now described, for example, on the basis of the schematic drawings. These show:

[0024] FIG. 1 shows a partially sectional view of a first embodiment of a filling device that has an axially-adjustable valve element;

[0025] FIG. 2 shows a view similar to that shown in to FIG. 1 of a second embodiment of a filling device that has an axially-adjustable valve seat;

[0026] FIG. 3 shows a view similar to that shown in FIG. 1 of a third embodiment according to that shown in FIG. 2 with an integrated configured folding bellows element and a valve seat;

[0027] FIG. 4 shows a view similar to that shown in FIG. 1 of a fourth embodiment according to that shown in FIG. 3 that has a valve element that is positioned differently;

[0028] FIG. 5 shows a view similar to that shown in FIG. 1 of a fifth embodiment according to FIG. 3 with a valve element held in the mouth of the product channel in a position in accordance with that shown in FIG. 4; and

[0029] FIG. 6 shows a further embodiment, in which, for a filling device like that shown in FIG. 5, a different arrangement of the flow meter is provided.

[0030] In all the figures, elements that are identical or of the same function are provided with the same reference numbers.

DETAILED DESCRIPTION

[0031] FIG. 1 shows a first filling device 10 that includes a product-supply channel 14 that opens up into a cylindrical product space 16 to form a product supply 12. A first folding bellows element 20, a valve seat 22, a second folding bellows element 24, and a cylindrical lower product-channel section 26 define a product channel 18 that extends downward from the product space 16. A magnetically inductive flow meter (MID) 28 has been integrated into the lower product channel section 26.

[0032] The lower product-channel section 26 ends in a dispensing opening 30. A gas barrier 32 at the dispensing opening 30 prevents ambient air from entering the product channel 18 via the dispensing opening 30.

[0033] At the center of the product channel 18 is a valve rod 34. An actuator element 36, hereafter referred to as simply an actuator 36, actuates the valve rod 34 so that it moves in the axial direction.

[0034] A valve element 38 held at the end of the valve rod 34 forms a counter-rotating double cone. In the illustrated embodiment, the valve element 38 is formed by two frustoconical structures joined at their bases. The valve element 38 interacts with the valve seat 22 to form a filling-and-regulating valve 39, hereafter referred to as the valve 39.

[0035] A spring 40 holds the valve seat 22 under preliminary tension by means of a spring against an annular stop 42. In the illustrated embodiment, the stop 42 lies on the lower product channel section 26 and the spring 40 is a helical pressure spring.

[0036] The actuator 36 controls the flow aperture of the valve 39. It does so by controlling the axial extent of the deflection. Doing so controls the cross-sectional area of the valve's annular opening.

[0037] When the valve 39 closes, the valve element 38 moves upwards and eventually reaches the valve seat 22. In response, valve seat 22 deflects slightly against the force of the pressure spring 40. This promotes a gentle closing of the valve 39, which in turn saves wear on the interacting sealing surfaces at the valve seat 22 and at the valve element 38. This gentle closure also reduces turbulence in the product. This, in turn, reduces the precipitation rate.

[0038] Hydrostatic pressure of the product in the product space 16 causes the product to flow downwards through the product channel 18, through the dispensing opening 32, and into a container 44, e.g. a bottle. The flowmeter 28 measures how much product has flowed into the bottle and sends an appropriate signal to a controller. When this amount corresponds to a reference value, the controller causes the actuator to actuate the valve rod 34. The filling device thus provides a simple way to fill a container 44 with a particular volume.

[0039] A second filling device 50, shown FIG. 2 differs from that shown in FIG. 1 because the valve rod 34 and the valve element 38 connect to the product supply 12. In this embodiment, a valve-seat adjuster 52 adjusts the axial position of the valve seat 22. Together, the valve element 38 and the valve seat 22 form a filling-and-regulating valve 54. In one embodiment, the valve element 38 is below the valve seat 22, as shown in FIG. 2. However, in another embodiment, an otherwise identical valve element 38a it above the valve seat 22, as shown by the dotted line in FIG. 2. These embodiments differ only in the direction in which the actuator 36 moves.

[0040] In some embodiments, a link element of a filling machine controls the valve seat adjuster 52 in FIG. 2. Such a filling machine includes plural filling devices of the type described herein.

[0041] In other embodiments, a magnetically-inductive flow meter 28 provides a signal to be used for actuating the valve seat adjuster 52. This permits regulating the filling quantity at each individual filling process to be at a predetermined reference value, or in the alternative, to regulate the filling quantity over a period of time so that it conforms to a predetermined reference value.

[0042] In a third filling device 60, shown in FIG. 3, an integrated wall element 62 forms the first folding bellows element 20, the valve seat 22, and the second folding bellows element 24. In this embodiment, the valve seat 22 is a polymer ring that is formed on an actuation arm that has a ring-shaped cut-out opening.

[0043] A fourth filling device 70, shown in FIG. 4, is largely identical to the third filling device 60 in FIG. 3 except that the valve element 38 is above rather than below the valve seat 22 in much the same way that the valve element 38a was above the valve seat 22 in FIG. 2.

[0044] FIG. 5 shows a fifth filling device 80 that differs from the fourth filling device 40 by no longer having the valve rod 34 and the valve element 38 secured to the upper side of the product space 16. Instead, a spoked-wheel holder 82 secures the valve rod 34 and the valve element 38 to an inlet of the product space 16 at the product channel 18. This results in a product space 16 that can more easily be kept hygienic.

[0045] Finally, FIG. 6 shows a sixth filling device 90 that differs from the fifth filling device 80 by having a flow meter 28 be arranged immediately beneath the product space 16 and above the valve element 38 rather than beneath this valve element 38, as was the case in the fifth filling device 80.

[0046] The invention is not restricted to the embodiments described herein. Other embodiments are within the scope of the appended claims.