Valve attachment, filling device, filling assembly, and method for filling a container with liquid and draining said container of liquid

Abstract

The present invention relates to a valve attachment (2) for filling at least one container (1, 1′) with a liquid and draining the at least one container of said liquid, which valve attachment can be tightly attached to the container (1, 1′) by means of a bottom side. The valve attachment (2) has a first and a second valve (5, 6), which each have an annular valve seat (7, 8) and each have an annular closing part (9, 10) corresponding thereto, wherein the closing parts (9, 10) are aligned with each other and are designed to surround a specified tubular element (3) in such a way that an annular gap (7′, 8′) is formed. The first valve seat (7) is stationary and the second valve seat (8) can be moved in a valve longitudinal direction. The closing parts (9, 10) are arranged on a common carrier (11) that can be moved along the valve longitudinal axis. The valve attachment (2) has at least three construction units that are separate from each other, wherein a first construction unit (21′), which is arranged at an end of the valve attachment (2) facing the container (1, 1′) to be filled, comprises a first housing part (21) and the valve seat (7) for the valve (5), which valve seat is comprised by the first housing part. The second construction unit (22′), which is arranged at an end of the valve attachment (2) facing away from the container (1, 1′) to be filled, comprises a second housing part (22) and the valve seat (8) for the valve (6). The third construction unit (23′) comprises the closing parts (9, 10) and the carrier (11). The construction units (21′, 22′, 23′) can be moved in relation to each other in the direction of the valve longitudinal axis. The invention further relates to a filling device that uses the valve attachment (2) according to the invention, a filling assembly, and a filling method and a draining method in which the device according to the invention is used.

Claims

1. A valve attachment for filling and draining a container with a liquid, the valve attachment comprising: a first housing part and a second housing part; a first valve comprising a first annular valve seat arranged in the first housing part and further comprising a first annular closure part matching the first annular valve seat; a second valve comprising a second annular valve seat arranged in the second housing part and further comprising a second annular closure part matching the second annular valve seat; the first and second annular closure parts aligned with each other along a longitudinal valve axis of the valve attachment and configured to surround a tubular element so as to form a first annular gap and a second annular gap, respectively, relative to the tubular element; the first annular valve seat fixedly secured within the valve attachment; the second annular valve seat slidable relative to the longitudinal valve axis; a common support slidable along the longitudinal valve axis, wherein the first and second annular closure parts are arranged on the common support; wherein the first housing part and the first annular valve seat form a first structural unit that is arranged at a first end of the valve attachment facing the container to be filled or drained, wherein the first end is configured to be attached seal-tightly to the container; wherein the second housing part and the second annular valve seat form a second structural unit that is arranged at a second end of the valve attachment facing away from the container to be filled or drained; wherein the first and second annular closure parts and the common support form a third structural unit; wherein the first, second, and third structural units are separate from each other and are movable relative to each other in the direction of the longitudinal valve axis.

2. The valve attachment according to claim 1, wherein the first and second annular closure parts and the common support are arranged so as to be non-slidable relative to each other or are monolithically embodied.

3. The valve attachment according to claim 1, further comprising a holding section arranged on the second structural unit, wherein the holding section is configured to hold the tubular element concentrically in passages of the first and second annular closure parts.

4. The valve attachment according to claim 3, wherein the holding section comprises a lower section, fixed relative to the second structural unit and provided with a through opening for the tubular element, and further comprises an upper section, connected detachably to the lower section and provided with a bore for the tubular element, wherein the through opening is aligned with the passages of the first and second annular closure parts, and wherein the holding section comprises a clamping body seated in the through opening and supported by a spring relative to the upper section.

5. The valve attachment according to claim 1, wherein the first and second valves are conical valves.

6. The valve attachment according to claim 1, wherein at least one of the first valve and the second valve is concentrically surrounded relative to the tubular element by an annular space in which a medium can be stored.

7. The valve attachment according to claim 1, wherein the first annular closure part is sealed relative to the first structural unit by a first sealing bellows that follows a movement of the first annular closure part relative to the first structural unit, and wherein the second annular closure part is sealed relative to the second structural unit by a second sealing bellows that follows a movement of the second annular closure part relative to the second structural unit.

8. A filling or draining device for filling a container or for draining a liquid from a container, the device comprising: a tubular element in the form of a pipe; a balloon body; a valve attachment comprising: a first housing part and a second housing part; a first valve comprising a first annular valve seat arranged in the first housing part and further comprising a first annular closure part matching the first annular valve seat; a second valve comprising a second annular valve seat arranged in the second housing part and further comprising a second annular closure part matching the second annular valve seat; the first and second annular closure parts aligned with each other along a longitudinal valve axis of the valve attachment and configured to surround the pipe so as to form a first annular gap and a second annular gap, respectively, relative to the pipe; the first annular valve seat fixedly secured within the valve attachment; the second annular valve seat slidable relative to the longitudinal valve axis; a common support slidable along the longitudinal valve axis, wherein the first and second annular closure parts are arranged on the common support; wherein the first housing part and the first annular valve seat form a first structural unit that is arranged at a first end of the valve attachment facing the container to be filled, wherein the first end is configured to be attached seal-tightly to the container; wherein the second housing part and the second annular valve seat form a second structural unit that is arranged at a second end of the valve attachment facing away from the container to be filled, wherein the first and second annular closure parts and the common support form a third structural unit; wherein the first, second, and third structural units are separate from each other and are movable relative to each other in the direction of the longitudinal valve axis, a holding section arranged on the second structural unit and configured to hold the pipe concentrically in passages of the first and second annular closure parts; the holding section comprising a lower section, fixed relative to the second structural unit and provided with a through opening for the pipe, and further comprising an upper section, connected detachably to the lower section, wherein the through opening is aligned with the passages of the first and second annular closure parts; wherein the pipe is arranged on the upper section of the holding section and extends, concentrically positioned, through the through opening of the lower section of the holding section and farther through the passages of the first and second annular closure parts; wherein the pipe is configured to project into a position close to a bottom of the container in an arrangement of use of the filling or draining device; wherein the balloon body comprises a closed end pulled over a free end of the pipe, wherein the balloon body extends through the valve attachment up to the holding section and comprises an upper end secured at the holding section.

9. The device according to claim 8, wherein the balloon body is secured in the through opening fluid-tightly by a clamping body that is supported by a spring against the upper section of the holding section, wherein a clamping pressure of the clamping body is higher than a fluid pressure.

10. The device according to claim 9, wherein the balloon body, the pipe, and the upper section of the holding section together form a detachable unit that is detachable from the valve attachment, wherein the upper section comprises a bore in which the pipe is received, and wherein the pipe extends through the bore upwardly and is received non-detachably in a fastening socket configured to be detachably coupled with a fluid source.

11. The device according to claim 9, wherein the through opening comprises an inner side with a cone tapering in a direction toward the second housing part, wherein the clamping body clamps the upper end of the balloon body relative to the cone, wherein the clamping body is a clamping ball or a clamping cone.

12. The device according to claim 9, wherein the balloon body is a hose of thermoplastic elastomeric hose material closed at a first end by an end member, preferably a cylindrical end member, preferably a cylindrical PE end member, inserted into the hose at the first end and welded to the hose material, wherein the hose comprises one or more longitudinal webs and/or one or more longitudinal grooves along a length of the hose.

13. The device according to claim 9, wherein the balloon body is formed of a non-elastomeric material and has a first lower end that is not open, wherein the balloon body comprises one or more longitudinal webs and/or one or more longitudinal grooves along a length of the balloon body.

14. The device according to claim 9, wherein the balloon body comprises a hose-shaped section comprising an inner diameter corresponding to an outer diameter of the pipe, wherein the hose-shaped section is pulled without play over the pipe, and further comprises a section that is configured to unfold to a shape so as to contact in an unfolded state an inner wall of the container.

15. A filling assembly for filling a container with a liquid or for draining a liquid from a container, the filling assembly comprising a device according to claim 8 and further comprising a fluid volume compensator, wherein the valve attachment of said device is arranged fluid-tightly on the fluid volume compensator and the fluid volume compensator is arranged fluid-tightly on the container.

16. A filling method for a container employing a device according to claim 8, the filling method comprising the steps of: fluid-tightly arranging a container with a fill opening on the first end of the valve attachment; inserting the pipe with the balloon body pulled over the pipe into the container; moving upwardly the second structural unit to lift the second annular closure part off the second annular valve seat and to open the second valve; expanding the balloon body by flowing an expansion medium into the balloon body and displacing fluid contained in the container by the expanding balloon body, wherein the fluid escapes through the open second valve; moving upwardly by the same travel the first structural unit and the third structural unit to lift the first annular closure part off the first annular valve seat and to open the first valve while closing the second valve; flowing filling fluid into the container via the first valve through the annular gap of the first valve; displacing the expansion medium from the balloon body by the inflowing filling fluid until the balloon body is completely contracted; lifting the valve attachment from the container and pulling the pipe and the balloon body out of the container.

17. The filling method according to claim 16, further comprising: connecting a fluid volume compensator seal-tightly to the first end of the valve attachment and connecting the fill opening of the container seal-tightly to the fluid volume compensator opposite the valve attachment; filling a compensation volume of the fluid volume compensator with the filling fluid; when pulling out the pipe and the balloon body, allowing flow of the filling fluid contained in the compensation volume out of the fluid volume compensator into the container to compensate a displacement volume of the pipe and the balloon body.

18. A draining method for a container employing a device according to claim 8, the method comprising: fluid-tightly arranging a container filled with a filling fluid with a fill opening at the first end of the valve attachment; inserting the pipe with the balloon body pulled over the pipe into the container; moving the second structural unit and the third structural unit upwardly by the same travel to lift the first annular closure part off the first annular valve seat and open the first valve; expanding the balloon body by flowing an expansion medium into the balloon body and displacing the filling fluid out of the container, the filling fluid escaping through the annular gap of the open first valve; moving downwardly the third structural unit to place the first annular closure part on the first annular valve seat and close the first valve and to lift the second annular closure part off the second annular valve seat and open the second valve; allowing the expansion medium to escape from the balloon body via the second valve to contract the balloon body and compensate pressure.

19. The draining method according to claim 18, further comprising: connecting a fluid volume compensator seal-tightly to the first end of the valve attachment and connecting the fill opening of the container seal-tightly to the fluid volume compensator opposite the valve attachment; wherein, when expanding the balloon body, a compensation volume of the fluid volume compensator is filled with the filling fluid to be drained, and the balloon body is then allowed o expand into the compensation volume so that the filling fluid to be drained is displaced completely out of the fluid volume compensator.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further embodiments as well as some of the advantages which are associated with these and further embodiments will become apparent and easily understood by the following detailed description with reference to the attached drawings. Articles or parts thereof which are substantially identical or similar can be provided with the same reference characters. The Figures are only a schematic illustration of an embodiment of the invention. It is shown in:

(2) FIG. 1a a section view of the valve attachment in closed state;

(3) FIG. 1b an illustration corresponding to that in FIG. 1a wherein the valve for air is open;

(4) FIG. 1c an illustration in accordance with those of FIGS. 1a and 1b, wherein the valve for the air is closed and the valve for the liquid is open;

(5) FIGS. 2a to 2d the method sequence for filling a bottle; FIGS. 3a to 3d the method sequence for draining a bottle;

(6) FIG. 4 a longitudinal section view of a filling device with volume compensator;

(7) FIG. 5 a device schematic in the state prior to filling the container;

(8) FIG. 6 a device schematic in the state after filling the container.

DESCRIPTION OF PREFERRED EMBODIMENTS

(9) The filling or draining device according to the invention, whose basic principle is illustrated in FIGS. 1a to 1c, will can be employed for filling as well as for draining a container. Draining can be, for example, necessary when a transfer is required in connection with bottle fermentation. Filling can mean any filling of liquid into a container such as a bottle but also in principle other containers. In the illustrated Figures a bottle 1 is illustrated.

(10) The filling or draining device according to the invention is placed in FIGS. 2a to 2d seal-tightly onto the bottle 1 (as is also shown in FIGS. 3a to 3d).

(11) The filling or draining device comprises a valve attachment 2 and a pipe extended therethrough with a balloon-like body 4 pulled over it. In this context, the pipe 3 is projecting at the bottom out of the valve attachment 2. The valve attachment 2 is designed such that it the with its bottom is seal-tightly seated on the bottle 1 (see FIGS. 2a-d and FIGS. 3a-d) when the latter is directly filled or on a volume compensator 1′ (see FIG. 4) when the bottle is “indirectly” filled. At an upper end area of the pipe 3, the balloon-like body 4 is connected fluid-tightly with the pipe 3. Here, a ball 163 is connected with the pipe 3 or pushed onto the pipe 3 wherein the balloon-like body 4 is pulled over the ball 163. The ball 163 is seated in this context in a through opening 161′ and the balloon-like body 4 is clamped between the ball 163 and the upper rim of the through opening 161′.

(12) The balloon-like body 4 can be a hose that is formed of a thermoplastic elastomeric material, for example, a TPE extrudate, that is closed off at its lower end (i.e., the end that is provided for positioning in the container to be filled or drained). Closure can be realized by means of an end member, for example, a PE end member, that can be welded to the hose material. A cylindrical end member is advantageous because it can be inserted without problem into the hose end and welded therewith. The hose in its non-expanded shape has an inner diameter that corresponds to the outer diameter of the pipe 3. Its material properties with regard to wall thickness and elasticity are selected such that the hose expanded by inflation assumes a balloon shape which fills out the interior volume of the container to be filled or of the bottle to be filled and optionally the upstream pressure compensator (see FIG. 4). An extruded hose is particularly suitable when longitudinally extending webs or grooves are provided on the outer side of the balloon-like body 4 because they can be produced essentially without additional costs. The grooves or webs are provided, as explained above, in order to provide flow channels and to enable in this way a complete drainage of a container without formation of “liquid bubbles” or “gas bubbles” between balloon-like body 4 and container wall.

(13) It is however also possible that the balloon-like body 3 is a simple balloon that is closed off at the end, i.e., is not open. The balloon-like body 4 can be a body that is not open at its lower end and is formed of a non-elastomeric material. The latter has a hose-like section that has unchangeably an inner diameter that corresponds to the outer diameter of the corresponding given pipe 3 and therefore surrounds the latter in a flush arrangement, and it has a section that can be unfolded that is like a pocket that can be unfolded and has a shape that corresponds to the inner shape of the container. This section can be of a very strong, thin-walled material and is located during the filling or draining process in the interior of the container. As in the case of the hose, on the outer side of the non-open balloon-like body longitudinal webs are present which extend from the lower end of the non-open body up to the upper one of the two valves or past it.

(14) Upon expansion of the balloon-like body 4, the latter does not only line the container completely but also the interior of the valve attachment 2, i.e., the balloon-like body 4 contacts inwardly the through bore of the support 11 or of the closure parts 9, 10 and the valve seats 7, 8. Accordingly, the valve attachment 2 can also be freed completely from ambient air prior to filling so that here also the filling fluid does not come into contact with ambient air.

(15) The valve attachment 2 that in principle can also be used in filling devices other than the one according to the invention shows in FIGS. 1a to c but also in FIG. 5 a first valve 5 and a second valve 6 with a respective annular valve seat 7, 8 as well as, corresponding thereto, an annular closure part 9, 10. The first valve seat 7 is fixed relative to a container to be filled and the second valve seat 8 is slidable in relation to a longitudinal valve axis. The two closure parts 9, 10 are aligned with each other and surround the pipe (3) with formation of a respective annular gap 8′, 9′. The closure parts 9, 10 of the two valves 5, 6 are arranged on a common support 11 which is movable along the longitudinal valve axis wherein the unit of the closure parts 9, 10 and of the support are referred to as third structural unit 23′. The valve seat 7 of the lower valve 5 and the correlated housing part 21 are referred to as “first structural unit 21′”. The second structural unit 22′ refers to the valve seat 8 of the upper valve 6 and its correlated housing part 22.

(16) The structural units 21′, 22′, 23′ can be moved relative to each other along the longitudinal valve axis in order to open valves 5, 6 individually or both valves 5, 6.

(17) The movement sequence for opening the upper valve 6, which here is the air valve, is illustrated in FIG. 1b. For this purpose, the second structural unit 22′ that comprises the component with the valve seat 8 of the upper valve 6 and the second (upper) housing part 22 is moved in the direction illustrated by arrows along the longitudinal valve axis so that the valve seat 8 lifts off the closure part 10 and an opening cross-section becomes available so that the valve is open. In this state, ambient air but also any other gaseous or liquid medium can flow in or out through the annular gap 8′ that is located between the valve seat 8 and the outer wall surface of the balloon-like body 4. The ambient air is supplied to or discharged from the valve 6 via the bore 14 and the annular space 12 adjoining it. The bore 14 and the annular space 12 are sealed relative to the support 11 by a sealing bellows 24 so that no ambient air or other fluid can escape. This is in particular important when the filling or draining process is carried out with high differential pressures. The movement of the second structural unit in the direction of the longitudinal valve axis is illustrated in this context by the spacing b that corresponds to the spacing of the first housing part 21 from the second housing part 22 in the closed state of FIG. 1a.

(18) The movement sequence for opening the lower valve 5 since here the liquid valve is located is illustrated in FIG. 1c. In this context, the second structural unit 22′, comprising the component with the valve seat 8 and the second (upper) housing part 22, and the third component unit 23′, comprising the closure parts 9, 10 and the support 11, are displaced by the same amount in the direction indicated by the arrows along the longitudinal valves axis so that the closure part 9 of the lower valve 5 is lifted off its valve seat 7 and the valve is opened. The upper valve 6 (here air valve) remains closed. Accordingly, flow through the valve 5 in/from the annular space 12 and the bore 15 is possible. At the bottom a sealing action of the annular space 12 surrounding the valve seat 7 relative to the support 11 by means of a sealing bellows 24 is also present so that the slide surfaces of the support 11 relative to the housing part 21 or relative to the component that comprises the valve seat 7 cannot come into contact with the filling fluid and cannot be contaminated and no germ hot spots can form.

(19) The function when filling the container 1 with a liquid 13 is as follows (FIGS. 2a to 2d):

(20) First, the attachment 2 is placed from above onto the empty container 1 in the form of a bottle and the pipe 3 together with the balloon-like body 4 pulled over it is inserted so that the attachment 2 with its bottom is resting seal-tightly on the upper bottle neck (FIGS. 2a and 2b). Now the air valve (second upper valve 6) of the valve attachment 2, as disclosed in FIG. 1b, is opened. Subsequently, the balloon-like body 4 is inflated with an expansion medium (in particular sterile compressed air) in such a way that this balloon-like body 4 fills out the entire interior of the container 1 (FIG. 2c). The supply of expansion medium is realized in this context by means of the pipe 3. Instead of filling the balloon, it is also possible to evacuate the container in order to “pull” the balloon against the inner wall surface.

(21) In that the balloon-like body 4 fills out the entire interior of the container 1, the air contained therein must escape. For this purpose (as illustrated in FIG. 1b) the second valve 6 is opened. The displaced air is then discharged upon inflating the balloon-like body 4 via the annular space 12 and the bore 14. In order for all of the air to escape from the container 1 during gradual inflation of the balloon-like body 4 so that no “air bags” are formed, the surface of this balloon-like body 4 is preferably profiled in longitudinal direction, i.e., comprises webs or grooves.

(22) Subsequently, the liquid 13 can be supplied to the container 1. For this purpose, the upper second valve 6 is closed again and the lower first valve 5 is opened wherein the sequence for opening the lower valve 5 is described in regard to FIG. 1c. Via bore 15 and the annular space 12 the filling fluid 13 is supplied to the lower first valve 5 and flows finally through the annular gap 9′ between the wall surface of the balloon-like body 4 and the valve seat 7 into the container 1. The filled container 1 is illustrated in FIG. 2d.

(23) Subsequently, the filling device with its attachment 2, the pipe 3, and the balloon-like body 4 can be pulled out again.

(24) The function for draining the container 1 filled with a liquid 13 is as follows (FIGS. 3a to 3d):

(25) Here also, first the attachment 2 with its bottom is placed seal-tightly onto the opening of the container 1 and is inserted with its pipe 3 and the balloon-like body 4 into the container 1 filled with a liquid 13.

(26) First, the lower first valve 5 which is the liquid valve is then opened as disclosed in FIG. 1c. Subsequently, the balloon-like body 4 is inflated with an expansion medium which is supplied through the pipe 3. By the pressure on the liquid 13 which is contained in the container 1, this liquid 13 is forced out through the lower first valve 5. In this context, the liquid 13 flows first through the annular space 12 and flows then out via the bore 15. In FIG. 3c it is illustrated that the balloon-like body 4 completely fills out the container 1 and all liquid 13 has thus been pressed out. In order for all liquid 13 to flow out of the container 1, the surface of the balloon-like body 4 is preferably profiled, in particular profiled in longitudinal direction.

(27) Subsequently, the expansion medium is again discharged from the balloon-like body 4 so that the latter returns into its initial state (FIG. 3d). However, during contraction of the balloon-like body 4, the upper second valve 6 which is here an air valve must be opened so that ambient air or any other gas can flow into the bottle in order to produce pressure compensation. The movement sequence of the valve attachment 2 for opening the upper second valve 6 is disclosed in connection with FIG. 1b.

(28) The valve attachment 2 can be placed either directly onto a bottle or onto a similar container 1 that is to be filled (see FIGS. 2a-d, FIGS. 3a-d) or “indirectly” via a volume compensator 1′ which is essentially also a “container to be filled”. This is illustrated in FIG. 4. The volume compensator 1′ is lined by the balloon-like body and is filled and emptied with the method.

(29) In FIG. 4, the balloon-like body 4 (see, for example, FIG. 5 and FIG. 6) is however not shown. The latter is pulled over the pipe 3 from the side which is facing the container to be filled and extends to an upper end area of the pipe 3, i.e., an area facing away from the container. Here a clamping ball 163 is provided by means of which the balloon-like body is sealed fluid-tightly relative to the pipe 3. For guiding the pipe 3 in axial direction, a holding section 2 is provided which is arranged at the upper end of the second structural unit 22′, more precisely on the component that comprises the valve seat 8 of the second valve 6.

(30) The holding section 16 is comprised in this context of two individual parts, a lower section 161 which is fixedly secured relative to the second structural unit 22′ and a removable upper section 162 which comprises a receiving bore 162′ in which the pipe is supported with little radial play. The lower fixedly secured section 161, on the other hand, has a through opening 161′ through which the pipe 3 is guided wherein the pipe 3 has a considerable radial play therein. The clamping body 163 is resting on the upper rim of this through opening 161′. It is provided to clamp the balloon-like body between the clamping body and the through opening. In order for the balloon-like body not to be damaged by clamping forces that are too great upon clamping, a spring 164 is provided which is supported with one end on the removable section 162 of the holding section 16 and with the other end on the clamping body 163; in this way, the clamping force is limited. With the illustrated construction, a simple exchangeability of the balloon-like body can be achieved. For exchange, first the detachable section 162 is separated from the fixedly secured section 161 of the holding section so that the spring 164 is relieved and a balloon-like body which is secured between spring 164 and through opening is released from its clamping action. The balloon-like body in the contracted state can be pulled out of the valve attachment together with the upper section 162 of the holding section 16, the pipe 3, and the clamping body 163. Subsequently, a new balloon-like body can be mounted in that the latter is pulled over the pipe 3 and the clamping body 163. The installation is realized in reverse sequence—replacement of a damaged balloon is thus easily possible.

(31) Advantageously, the balloon-like body has such a length that it extends across the entire length of the pipe 3, through the fluid volume compensator 1′, the valve attachment 2, and past it. Upon expansion of the balloon-like body not only the container to be filled/drained is lined but also the interior of the valve attachment 2 and of the volume compensator 1′ so that sterile filling is enabled.

(32) The volume compensator 1′ receives the filling quantity that is displaced out of the container, usually a bottle 1, that is to be actually filled or to be drained, by the pipe 3 required for filling together with the balloon-like body 4 when both together are inserted into it. Accordingly, this liquid quantity received in the volume compensator 1′ will flow down after pulling out the pipe 3 together with balloon-like body 4.

(33) In FIG. 5, a schematic of a device is illustrated in which the filling or draining device according to the invention is used. The illustrated state is the state shortly before beginning the filling process. The balloon-like body 4 is expanded here and lines the bottle 1, the volume compensator 1′ as well as the valve attachment 2. In order for liquid to flow into the bottle 1, the second structural unit 22′, comprised of second housing part 22 and the component with the valve seat 8, and the third structural unit 23′, comprised of the support 11 and the closure parts 9, 10 are moved upwardly in order to open the lower valve 5 (see FIG. 1c); this is illustrated by the arrows. In this context, it is provided that the liquid quantity to be filled in is first pre-metered by a pre-metering device 30 that comprises a piston 3β′ and then pressed in by means of it. In order to prevent that return flow occurs upon pressing stroke of the piston 30′, a check valve 30″ is provided. Moreover, the line for the expansion medium 40 can be seen that is connected gas-tightly with the upper detachable part 162 of the holding section 16. Through this line 40, the expansion medium is discharged out of the balloon-like body 4 proportional to the filling quantity as soon as the filling process is started. The expansion medium can be pure compressed air.

(34) In order to allow in this expanded end state inflow and outflow of fluid (air or liquid) into or out of the container along the length of the now balloon-like body (for short “balloon”) in the container, the hose has at its outer side at least one, better two or even better several more, longitudinal webs whose cross-section profile can be almost arbitrary; it is only important that the longitudinal webs when the expanded hose assumes the balloon shape is supported on the container wall and a flow gap is formed from the bottom of the container upward. Upon manufacture of the hose as an extrudate, it is in particular suitable to produce the webs simply continuously. These webs have a length that extends from a lower end of the hose, which will come to rest at the bottom of the lower container to be filled, up to at least the section of the hose which is ending at the upper edge of the second valve. Accordingly, the length of the hose must be at least so long that its non-expanded section extends from the clamping action in the holding section through the valve attachment and father through optionally the fluid volume compensator and finally into a second one which is actually to be filled so that the expanded section reaches the bottom of this container.

(35) In this context, reference is being had expressly to patent application DE 10 2012 021 775 A1 and its disclosure is incorporated herein, which discloses a distance adaptation device for such filling devices which are filled with the balloon/rod principle.

(36) In FIG. 6 the state after completed filling (or before the beginning of drainage) is illustrated. The second structural unit 22′ and the third structural unit 23′ are in their rest position, i.e., the first valve 5 and the second valve 6 (see FIG. 1a to FIG. 1c) are closed. The bottle 1 is full and the balloon-like body 4 is contracted. However, the balloon-like body 4 and the pipe 3 displace a volume within the bottle 1 so that the filling level will drop when pulling them out of the bottle 1. In order to compensate this “loss”, in the volume compensator 1′ a compensation volume is made available that is matched to the dimensions of the pipe 3 and the inserted balloon-like body 4 and can flow down when pulling out the pipe 3.

LIST OF REFERENCE CHARACTERS

(37) 1 container 1′ volume compensator 2 attachment 3 pipe 4 balloon-like body 5 first valve 6 second valve 7 valve seat (first valve 5) 7′ annular gap of the first valve 8 valve seat (second valve 6) 8′ annular gap of the second valve 9 closure part (first valve 5) 10 closure part (second valve 6) 11 support 12 annular space 13 liquid 14 bore (second valve 6) 15 bore (first valve 5) 16 holding section 161 fixedly secured lower section of the holding section 161′ through opening 162 detachably connected upper section of the holding section 162′ receiving bore 163 clamping body 164 spring 21 first housing part 21′ first structural unit 22 second housing part 22′ second structural unit 23′ third structural unit