Multifunctional filling valve
11702332 · 2023-07-18
Assignee
Inventors
- Valentin Becher (Neutraubling, DE)
- Benedikt HENGL (Neutraubling, DE)
- Josef Doblinger (Neutraubling, DE)
- Anton Huber (Neutraubling, DE)
- Hubert Auer (Neutraubling, DE)
- Stefan Poeschl (Neutraubling, DE)
Cpc classification
B67C3/026
PERFORMING OPERATIONS; TRANSPORTING
B67C2003/268
PERFORMING OPERATIONS; TRANSPORTING
International classification
Abstract
A filling valve for filling a container with a filling product, e.g., a beverage in a beverage filling system, includes a valve base body. The valve base body includes an outlet configured to discharge the filling product into the container; a swirl chamber configured to receive the filling product and is able to be brought into a fluidic connection with the outlet; and a main inlet, which feeds into the swirl chamber and is configured to introduce at least one main component of the filling product into the swirl chamber such that the filling product is swirled in the swirl chamber, whereby after exiting from the outlet the filling product flows downwardly in a spiral movement in the container. The swirl chamber has an annular shape, the cross-sectional contour thereof having a rounded shape, substantially without corner points, in the direction of extent and perpendicular to the direction of extent.
Claims
1. A filling valve for filling a container with a filling product comprising: a valve base body, which comprises: an outlet configured to discharge the filling product into the container; a swirl chamber configured to receive the filling product and to be brought into a fluidic connection with the outlet; and a main inlet that feeds into the swirl chamber and is configured to introduce at least one component of the filling product into the swirl chamber such that the filling product is swirled in the swirl chamber, wherein the swirl chamber has an annular shape and a circular cross-section; and a valve cone, wherein the valve cone comprises a deformable material and/or is configured to be adjustable, and the swirl chamber extends substantially axially symmetrically about the valve cone.
2. The filling valve of claim 1, wherein the main inlet opens tangentially into the swirl chamber.
3. The filling valve of claim 1, wherein in a region of an opening of the swirl chamber, the main inlet has a cross-section that is substantially the same shape and diameter as the cross-section of the swirl chamber.
4. The filling valve of claim 1, wherein the outlet has an annular shape and the swirl chamber tapers towards the outlet.
5. The filling valve of claim 1, wherein the valve cone is configured to control flow of the filling product through the outlet in an axially displaceable manner.
6. The filling valve of claim 1, wherein the valve base body further comprises a valve seat, wherein the valve cone and the valve seat are configured such that the valve cone is in contact with the valve seat for sealing the outlet in a shut-off position.
7. The filling valve of claim 1, wherein the valve cone comprises a conical outlet that tapers towards the outlet and extends at least partially into the swirl chamber.
8. The filling valve of claim 1, wherein: the valve base body further comprises one or more secondary inlets, and (i) the secondary inlets open into the swirl chamber and are correspondingly configured to introduce one or more additional components of the filling product into the swirl chamber, or (ii) the secondary inlets are coupled by apertures in or to a valve housing.
9. The filling valve of claim 1, wherein the valve base body further comprises a valve housing, which forms at least part of a wall defining the swirl chamber and the outlet.
10. The filling valve of claim 9, wherein: the valve base body further comprises a membrane made of a second deformable material that forms part of a wall defining the swirl chamber, and (i) the membrane comprises an annular clamping portion that is configured to fasten the membrane to the valve housing, or (ii) the membrane is connected to the valve cone.
11. The filling valve of claim 10, wherein the valve housing comprises one or more interfaces on an outer face remote from the swirl chamber that are configured to connect a line or a metering valve to the valve housing.
12. The filling valve of claim 1, wherein the valve base body further comprises a gas duct that penetrates the valve cone in an axial direction.
13. The filling valve of claim 1, wherein the filling valve further comprises a valve cone drive that is mechanically connected to a connecting portion of the valve cone and is configured to actuate the valve cone.
14. The filling valve of claim 13, wherein the filling valve further comprises: a valve central part that is connected to the valve base body; and a valve head part that is connected to the valve central part, wherein the valve central part comprises the valve cone drive.
15. The filling valve of claim 14, wherein the valve head part comprises one or more supply connections that are in fluidic communication with a gas duct and that provide an inlet and/or outlet for a gas.
16. The filling valve of claim 15, wherein the valve head part comprises one or more gas valve interfaces configured to connect a respective gas valve.
17. The filling valve of claim 1, further comprising a rod-shaped level probe configured to be inserted through a gas duct and to protrude in an inserted state into the container to detect a filling level of the filling product in the container.
18. A filling valve for filling a container with a filling product comprising: a valve base body, which comprises: an outlet configured to discharge the filling product into the container; a swirl chamber configured to receive the filling product and to be brought into a fluidic connection with the outlet; and a main inlet that feeds into the swirl chamber and is configured to introduce at least one component of the filling product into the swirl chamber such that the filling product is swirled in the swirl chamber, wherein the swirl chamber comprises an annular duct and/or has a shape of a torus; and a valve cone, wherein the valve cone comprises a deformable material and/or is configured to be adjustable, and the swirl chamber extends substantially axially symmetrically about the valve cone.
Description
BRIEF DESCRIPTION OF THE FIGURES
(1) Further embodiments of the invention are described in more detail by the following description of the figures.
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DETAILED DESCRIPTION
(16) Exemplary embodiments are described hereinafter with reference to the figures. In this case, elements which are the same, similar or similar-acting are provided with identical reference numerals in the figures and a repeated description of these elements is dispensed with in some cases in order to avoid redundancies.
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(18) The valve base body 10 has a swirl chamber 11 designed as an annular duct and/or torus. The valve base body 10 also has a main inlet 12, not visible in the perspective view in
(19) In the lower region of the valve base body 10 the swirl chamber 11 tapers toward an annular outlet 13 from which the filling product exits during the filling process and runs into a container placed below the valve base body 10 (not shown in
(20) It should be mentioned that the spatial terms such as “under”, “below”, “over”, “above”, etc. refer to the installed position of the filling valve 1 which is clearly determined by the direction of gravity. Moreover, by the annular outlet 13 the filling valve 1 and/or the valve base body 10 thereof has a clearly defined axial direction which in the installed state coincides at least substantially with the direction of gravity.
(21) By the tangential supply of filling product from the main inlet 12 into the swirl chamber 11 this filling product is swirled, whereby the filling product is forced outwardly due to centrifugal force and after exiting the valve base body 10 is pushed outwardly and flows downwardly on the container wall. The tapering and/or constriction of the swirl chamber 11 to the outlet 13 firstly leads to a uniform, well-defined swirl across the periphery and secondly is a significant determining factor for the flow rate. Thus if the degree of tapering, in particular the dimension of the annular gap at the outlet 13, is adjustable, an integrated flow control may be implemented, optionally including the shut-off thereof, or the maximum size of the pieces in the filling product may be altered.
(22) The aforementioned flow control may be implemented as follows: according to the exemplary embodiment of
(23) The lateral, i.e. tangential, main inlet 12 feeding into the swirl chamber 11 also provides space above the swirl chamber 11, in addition to the aforementioned technical effects. The space is unobstructed and may be used for mounting a membrane 17 which seals the swirl chamber 11 in the upper region. The membrane 17 has a circular outer contour which is connected directly or indirectly via a fastening means to the valve housing 15. The membrane 17 is fastened radially internally to the valve cone 14. The membrane 17 is produced from a flexible material, for example Teflon, whereby it is able to follow the axial movement of the valve cone 14 and at the same time ensures a hygienic seal of the swirl chamber 11. The symmetry of the membrane 17 additionally permits an embodiment with a high load cycle as is generally required for filling valves.
(24) The valve base body 10 also has a gas duct 18 which centrally penetrates the valve cone 14 in the axial direction. The gas duct 18, for example, is a return gas duct in order to divert any gas such as pressurized gas, which is displaced during the filling process out of the container. The gas duct 18, however, may also have a multi-duct construction, for example a pipe-in-pipe construction in order to provide separate supply and exhaust gas paths.
(25) The valve cone 14 terminates substantially directly below a throttle point, i.e. the narrowest point of the annular gap forming the outlet 13, whereby a defined change from a single-phase separated flow to a wall film flow is implemented in the container. Thus a well-defined uniform separation edge of the liquid is formed and namely at the point with the greatest flow rate. In an exemplary embodiment, the valve seat 16, i.e. the shut-off point, is located in the immediate vicinity of the separation edge, whereby the surfaces which could lead to dripping are minimized.
(26) The valve cone 14 is generally produced from Teflon, whereby the outflow behaviour is improved due to the low surface energy. If the valve housing 15 is additionally produced from stainless steel, a full seal may be ensured by such a material pairing, even in the case of high pressure differences.
(27) Apart from the valve cone 14, the valve base body 10 requires neither swirl bodies, such as for example guide blades or swirl ducts, nor additional flow guides and thus is very hygienic and tolerant relative to different solid/liquid mixtures which contain, for example, fruit pieces, slurry, fruit fibres or the like. Moreover, the size of the pieces in the flow is barely restricted due to the lack of swirl bodies. For filling large pieces, for example having volumes of 5×5×5 mm or more, the valve cone travel during the filling process may be increased in a flexible manner.
(28) The valve base body 10 is particularly suitable for the aforementioned wall filling in which the filling product runs downwardly in a spiral-shaped manner on the container wall. However, a filling valve 1 provided with the valve base body 10 may also be used as an open-jet valve. In this case, the valve base body 10 may be used as a hygienic control valve, by said control valve being installed in a corresponding filling product line with an adjoining steadying section and optionally a gas barrier at the outlet. If required, the swirl may be removed through a radial, instead of a tangential, main inlet 12.
(29) The valve base body 10 permits a thorough flushing out of the valve interior, in particular the swirl chamber 11 and the outlet 13 adjoining thereto in the filling direction, with a minimal quantity of flushing fluid, due to the high turbulence which may be achieved in the swirl chamber 11 and a relatively small surface area. For this reason, the valve base body 10 is particularly suitable for a frequent change of filling product, for example including the container, in particular of components to be metered-in. Due to the particularly effective capacity for flushing out, the valve base body 10 may also be used in aseptic filling machines.
(30) The integration of the control and shut-off function in the valve base body 10 permits a reduction in the number of components and a simplification of the product path. This leads to fewer pressure losses and contributes to a more careful product handling and reduced foam formation during the filling process.
(31) The compact design of the valve base body 10 additionally permits a hygienic integration of the valve cone drive and optionally further control functions in the valve head, i.e. above the swirl chamber 11, for example an integration of gas valves for prestressing the containers, return gas lines, depressurizing lines, solenoid valves for further separate control functions in the region of the filling valve 1, such as lifting and lowering the valve, metering-in components, etc. Similarly, for example, a control circuit board for implementing non-central control architectures may be installed in the valve head.
(32) Since the filling valve 1 with the valve base body 10 is able to be extended in a modular manner and is also able to be used both for wall filling and for open-jet filling and/or for products to be filled at atmospheric pressure, the plurality of variants of filling valve for different uses is reduced. Thus the effort in terms of care and maintenance and the number of machine variants are reduced. Filling systems which are provided with filling valves 1 of the type described herein are able to be used universally. A wide variety of different beverages, container formats and materials (PET, glass, can, still, carbonated, etc.) may be filled thereby.
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(34) Thus the valve base body 10 has two further inlets which are denoted herein as the first and second secondary inlets 12a, 12b. The number of two secondary inlets is only by way of example and may be varied according to the purpose of the application.
(35) The secondary inlets 12a, 12b permit the supply of further components, which are also denoted herein as additional component(s), directly into the swirl chamber 11. In order to be able to meter the quantities of additional components, the secondary inlets 12a, 12b are provided in each case with a metering valve 19a, 19b. The metering valve 19b is not visible in the perspective view of
(36) Through the secondary inlets 12a, 12b the mixing-in of additional components takes place directly in the swirl chamber 11, whereby an effective capacity for flushing out the valve base body 10 is ensured and any potential migration of flavourings is minimized. Due to the integration of the supply of metered components into the valve housing 15, no hoses or additional lines are required. In this manner, the valve base body 10 is particularly suitable for an instant change of product.
(37) The valve base body 10 is in many respects of modular construction and thus may be functionally extended and adapted in a simple manner. Thus in
(38) A material pairing of Teflon for the valve cone 14 and for the membrane 17 may be present in some embodiments. The flexibility of the membrane and the nature of the material assist a filling of the filling product by swirling, even with very small filling streams. Additionally, an unintended local maximum flow at the start of a filling process, before a uniform flow is set with swirling, is counteracted. In combination with a valve cone 14 made of Teflon which optimizes the outflow behaviour due to low surface energy, therefore, a uniform, steady and uninterrupted filling may be implemented with short filling times.
(39) Since the clamping portion 17a and the connecting portion 14a have defined, for example standardized, dimensions, different membranes 17 and/or valve cones 14 with different flow properties and filling properties may be used without the entire valve base body 10 having to be redesigned. The remaining valve base body 10, in particular the valve housing 15, may be a fixed, standardized component, whilst the valve properties are easily variable by the structural unit consisting of the valve cone 14 and membrane 17. In this manner, for example, the size of the swirl chamber 11, the shape of the valve cone 14, in particular the outlet contour 14b thereof, the prestressing position and the prestressing force of the valve cone 14 may be modified by the membrane 17, and the like, in a simple manner and adapted to the desired application environment.
(40) In a similar manner, the valve base body 10, in particular the valve housing 15, may also be designed in a modular manner. Thus
(41) The valve housing 15 is shown in
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(43) Returning to
(44) The tangential main inlet 12, set forth above, permits the upper face of the valve base body 10 to be unobstructed such that one or more modular valve components may be attached. Thus
(45) The valve central part 20 is fastened via an interface to the valve housing 15 of the valve base body 10. In the exemplary embodiment of
(46) According to this exemplary embodiment, the gas duct 18 provides separate gas paths via a pipe-in-pipe construction. The separation of the gas paths may be assisted at the interface between the valve central part 20 and the valve head part 30 by means of a membrane which is typically made of Teflon, so that these components may be connected in the valve head part 30 to the connections and/or interfaces described hereinafter.
(47) The valve cone drive 21 is received in a cylindrical housing 22 which is designed for fastening to the valve base body 10 and to this end has one or more well-defined, typically standardized, interfaces. The housing 22 is shown separately in
(48) The valve head part 30, which is shown separately in
(49) The valve head part 30 is fastened to the valve central part 20 via the valve carrier plate 31. In this case, the valve head part 30, in particular the valve carrier plate 31 thereof, may be designed to be connected directly to the valve base body 10.
(50) In the present exemplary embodiment, the valve head part 30 has a plurality of gas valve interfaces 32, 33 and 34, for example three thereof, which are designed for connecting gas valves 40, 41, 42 (see
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(56) A further feature of the flexibilization set forth herein of the filling valve 1 relates to the handling thereof in relation to the container 100 to be filled.
(57) According to
(58) The filling valve 1 is able to be provided with a level probe 60 as shown in
(59) The filling valve 1 set forth herein is particularly suitable for use in filling systems which are designed for flexible metering and instant product change by displacement to the rear. The filling product in this case is mixed together from a plurality of components, a main component such as water and at least one additional component such as syrup, directly in the swirl chamber 11 of the filling valve 1. In this case during the filling process, the additional components of the filling product are introduced via any potential metering valves 19a, 19b into the swirl chamber 11 and passed together into the container 100 to be filled. By introducing the additional components into the swirl chamber 11 the main component which was previously supplied through the main inlet 12 is displaced to the rear. The displaced volume of the main component is determined by means of a flowmeter and thus also the volume of the metered-in component(s) is known and controllable. During the subsequent filling of the filling product into the container 100, the main component together with the metered-in component is thoroughly flushed out of the filling valve 1 into the container 100, wherein at the same time the total filling quantity may be determined by the same flowmeter. During the next filling cycle, the filling quantities and also the metered component quantities may be determined again. Thus a highly flexible filling of customized beverages is possible, substantially without changeover times.
(60) If applicable, all of the individual features which are shown in the exemplary embodiments may be combined together and/or replaced without departing from the scope of the invention.