EP0682640A1 - Double valve - Google Patents
Double valveInfo
- Publication number
- EP0682640A1 EP0682640A1 EP95906832A EP95906832A EP0682640A1 EP 0682640 A1 EP0682640 A1 EP 0682640A1 EP 95906832 A EP95906832 A EP 95906832A EP 95906832 A EP95906832 A EP 95906832A EP 0682640 A1 EP0682640 A1 EP 0682640A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- ring
- pressure
- container
- double
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D1/00—Apparatus or devices for dispensing beverages on draught
- B67D1/08—Details
- B67D1/0829—Keg connection means
- B67D1/0831—Keg connection means combined with valves
- B67D1/0832—Keg connection means combined with valves with two valves disposed concentrically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D1/00—Apparatus or devices for dispensing beverages on draught
- B67D1/08—Details
- B67D1/0829—Keg connection means
- B67D1/0841—Details
- B67D1/0845—Security means
Definitions
- the invention relates to a double valve for a container of the type being used for distributing a liquid, e.g. beer, stored in the container under pressure of a gas, e.g. C0 2 , whereby the valve defines an axis and comprises a central liquid passage; a ring formed gas passage placed around the liquid passage; an elastomere valve ring placed in the gas passage and axially movable serving the purpose of closing the passage, under influence of the gas pressure and the spring force from a pressure spring, by being pressed into tight engagement with a seat in the valve; an opening formed in the valve ring and forming the mouth of the liquid passage; and a valve plug being axially movable and placed in the liquid passage serving the purpose of closing said mouth by, under influence of stress from the valve plug and the spring force from a pressure spring, being pressed into tight engagement with a seat formed in the opening of the valve ring.
- a gas e.g. C0 2
- Such containers are used especially for beer, cola and similar popular beverages.
- the numbers being in circulation are very high and the containers will often be situated in restaurants or similar establishments where many people will come and go.
- the containers are normally without any danger to the surroundings.
- the working pressure is only a few bars, and the containers are dimensioned on the large side to be able to resist this pressure. If a container, however, is exposed to intense heat, which for instance might be the case when a building is burning, the pressure in the container might be so high, that the container will explode whereby persons, who might be nearby, could be hit and be seriously injured.
- the double valves which are mounted on the containers, have a construction which entails that the valves, without being dismounted, can be cleaned efficiently and safely in the same process as the container.
- the construction entails, however, at the same time, that the higher the pressure in the container rises, the tighter the valve will close.
- valve ring has at least one area which is so much weaker than the adjoining areas, that the weaker area is deformed so much when the valve is in a closed condition under influence of the stress of the valve plug and the gas pressure, that the seat of the valve ring relieves the tight engagement with the valve plug in or at the weaker area, when the pressure in the container exceeds a pressure, chosen beforehand, larger than the normal working pressure in the container.
- valve On the outside the valve looks like a conventional double valve and it can be cleaned just as easily to an optimum extend. In daily use the valve is also working in precisely the same way, but if the pressure in the container now exceeds the normal, the hidden qualities of the valve will at a certain time come into operation. This moment occurs when the pressure in the valve has rised to said predetermined higher pressure than the working pressure. The valve is then leaking at the valve ring, whereby the gas starts to flow out through the leakage arosen. The pressure in the container now cannot, in all essentials, rise any more. In this condition the valve has automatically transformed itself into an efficiently working security valve.
- valve ring is therefore adapted in such a way that it will leak at a pressure level which on one hand is higher than the normally existing working pressures, and on the other hand is at a safe distance from the explosion limit.
- a container which is mounted with such a double valve will then be secured from explosion if it, for instance, should be exposed to intense heat, and without any influence on the function of the container when under normal operating conditions.
- the valve In order to impart the elastomere valve ring with sufficient stability, so that the valve can be closed safely in daily use, it can be supplied with an inserted reinforcement ring which e.g. can be of metal or plastic.
- the weaker areas which will cause the valve ring to leak at an overpressure too high, can then be provided by forming on the reinforcement ring an inwards turning collar and let the outline of the opening, which is limited by the collar, deviate from a full circle.
- the areas in the valve ring, where the radial distance of the collar from the valve axis is larger, will then become weaker in relation to the areas where the radial distance of the collar from the valve axis is smaller.
- the outline of the collar opening has mainly form of a circle interrupted by a number of incisions being formed in the collar with equidistant distances along the periphery.
- the weaker areas are formed at the incision and can optimum be adjusted to the purpose in dependence of the widnes and depth of the incisions. Since there are many incisions there will at the same time be formed a great blow-off area for the gas when the elastomere material gives in for an overpressure, whereby a high rate of security is created to the effect that the pressure will not rise further.
- the plug When the diameter of the circle outline, which is limited by the collar material between the incisions, is smaller than the inner diameter of the plug, the plug will then ac overpressure, where the elastomere material of the valve ring gives in, be stopped at areas which are regularly distributed along the opening of the collar of the reinforcement ring. Thereby the collar will provide an efficient security against the plug being shooted out into the room.
- the plug is controlled retained in position in the valve by the many areas with smaller diameters than the outwards diameter of the plug, and can consequently not get out edgeways at the areas with larger diameters.
- the weaker areas in the elastomere material of the valve ring can conveniently be weakened by dimensioning the incisions with an adequate big widnes and depth. If the joined area of the incisions, however, is too big, it can have a negative effect on the stability 'of the valve ring under normal working conditions and reduce the ability of the collar to stop and retain the plug from being shooted out by overpressure.
- edges turning towards the plug in the incisions of the collar can have such a sharpness that the edges cut into the elastomere material by overpressure, but not by normal working pressure.
- overpressure the elastomere material at the incisions will then be cut into pieces, and the size of the widnes and depth of these can consequently be reduced adequately.
- the function of the double valve as security valve depends on how the weaker areas of the valve ring are being arranged.
- the function can be adapted to the purpose by an adequate forming of the outline in the opening of the collar.
- the character of the stress acting on the valve ring by overpressure is furthermore of significant importance to the security function of the valve ring.
- This stress is due to the gas pressure, which partly influences directly on the valve ring, and partly indirectly via the valve plug.
- the force, whereby the plug acts on the valve ring is increased.
- the plug is squeezing itself into the opening of the valve ring and thereby presses the elastomere material in this latter up and outwards with great force, so that the material probably will be forced out through the incisions of the collar and opens for outflow of gas, thereby relieving the overpressure.
- the elastomere material can have a very high elasticity so that the material is not broken at the weaker areas but just gives in to the stress and returns to its original shape when the overpressure is relieved.
- the valve plug can in this connection mainly be formed as a spherical segment which is connected with a underlying abutting ring for the pressure spring with narrow legs in a construction which entails that most of the edge of the spherical segment is free.
- the spherical segment then will act as a sort of punch being able, by overpressure, to stamp out some of the elastomere material of the valve ring if this material is rather stiff and has a small elongation.
- RECTIFIEDSHEET Fig. 1 shows an axial section through a double valve according to the invention
- Fig. 2 is a side view in a larger scale of a valve plug for the double valve shown in 'fig. I,
- Fig. 3 is the same, taken after the line III-III,
- Fig. 4 is a view in a larger scale of a reinforcement ring for a valve ring for the double valve shown in fig. 1,
- Fig. 5 is the same, taken after the line V-V in fig. 1, and
- Fig. 6a-c show three successive steps in which the double valve by overpressure is turned into a security valve.
- Fig. 1 shows a double valve which is generally designated by the reference numeral 1.
- This double valve is more or less a well-known type and therefore only roughly described here.
- the double valve is by a thread assembly 2 screwed into a neck ring 3 on a container 4 which can only be seen in fragment .
- the container might typically be a transportable container for a beverage, as e.g. beer or cola, to be kept under pressure by a gas, e.g. C0 2 •
- a gas e.g. C0 2 •
- the pressure will under normal working conditions only be of a few bars .
- valve there is a central liquid passage 5 and around this a ring-formed gas passage 6. Both passages can be closed by an axially displaceable elastomere valve ring 7, which closes the gas passage by means of the gas pressure and a first pressure spring 8 being pressed tight up against a seat 9 in the valve at the mouth of the gas passage.
- the valve ring itself forms with its opening 10 the mouth of the liquid passage 5 which again can be closed off by an axially displaceable valve plug 11, which by the gas pressure and a
- RECTIFIEDSHEET second pressure spring 12 is pressed tight up against a seat 13 in the mouth of the valve ring.
- valve When the container is to be used the valve is mounted by a special coupling head (hot shown) which can open both the gas passage and the liquid passage. The inside of the container is then connected to a pressure gas source keeping the pressure in the container on the working pressure requested.
- the gas is among other things working as a driving gas which by opening of a drain cock (not shown) connected to the liquid passage, is driving the liquid out to the consumption place.
- Fig. 2 and 3 show the valve plug 11 with the left and the right side of the figures turning 90 degrees in relation to each other.
- the plug is builded up by a spherical segment 14 which with two narrow, but adequately strong legs 15, are
- RECTIFIEDSHEET connected to an abutting ring 16, which serves as support to the second pressure spring 12 (fig.l) .
- the ring is in the shown embodiment closed, but can also be partially open.
- Fig. 4 and 5 show a reinforcement ring 19 for inserting into the elastomere valve ring 7 for stiffening and stabilisation of this latter.
- the reinforcement ring has a mandrel 20 which follows the shape of the valve ring. At the top the mandrel emerges into an inside turning collar 21 which limits a circular opening 22 with eight uniformly distributed incisions 23 of a mainly rectangular shape.
- the reinforcement ring is, by the way, in the shape of a sheet with a comparatively thin wall thickness and it is made from a strong and stiff material as e.g. steel.
- the diameter of the opening is a little smaller than the outer diameter of the segment 14, and the distance from the centre of the circle to the bottom of an incision is larger than half the outer diameter of the spherical segment. Furthermore, each incision has a widnes of between 1,0% and 4,0%, preferably between 1,5% and 3,5% and especially between 2,0% and 3,0% of the circle length of the opening.
- Fig. 6a-c now show how the security device is operating when the pressure in the container exceeds a certain limit, normally called the overpressure permitted.
- valve plug 11 In fig. 6a the valve plug 11 with its spherical segment 14 is resting on the valve ring 7's seat 13.
- the position can be the normal closed position, but can also be the start position at
- the elastomere material is rather stiff and has a relatively small elongation.
- the spherical segment will then be acting as a punch tool stamping with its sharp edge 18 the material 24 out of the remaining part of the valve ring.
- the material, which is totally or partly released, will at the same time be shot up through the inwards turning reinforcement collar 21' s incisions 23 which advantageously can have sharp edges 25 cutting like knives the released material into a type of strips which are easily being able to pass the incisions.
- Fig 6c shows the final position of the security device where the valve plug 11 has been stopped by the collar 21 of the
- the double valve according to the invention will under normal conditions work as a conventional double valve. From outside it also appears as such and it can just as easily be cleaned up to the high hygienic standard which is required for containers for beverages .
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK023594A DK172394B1 (en) | 1994-02-25 | 1994-02-25 | double valve |
DK235/94 | 1994-02-25 | ||
PCT/DK1995/000084 WO1995023112A1 (en) | 1994-02-25 | 1995-02-24 | Double valve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0682640A1 true EP0682640A1 (en) | 1995-11-22 |
EP0682640B1 EP0682640B1 (en) | 1997-12-10 |
Family
ID=8091262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95906832A Expired - Lifetime EP0682640B1 (en) | 1994-02-25 | 1995-02-24 | Double valve |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0682640B1 (en) |
AT (1) | ATE161002T1 (en) |
AU (1) | AU1755195A (en) |
CZ (1) | CZ287474B6 (en) |
DE (1) | DE69501181T2 (en) |
DK (1) | DK172394B1 (en) |
ES (1) | ES2110831T3 (en) |
PL (1) | PL177836B1 (en) |
WO (1) | WO1995023112A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5882856A (en) * | 1995-06-07 | 1999-03-16 | Genzyme Corporation | Universal primer sequence for multiplex DNA amplification |
NL1010768C2 (en) | 1998-12-09 | 2000-06-13 | Dispense Systems International | Shut-off valve. |
EP3950571A4 (en) * | 2019-03-26 | 2023-01-11 | Knyazev, Sergey Vladimirovich | Fitting for a pet keg |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2364560A (en) * | 2000-07-10 | 2002-01-30 | Andrew John Thompson | Combination seal for a double valve |
NL1025630C2 (en) * | 2004-03-03 | 2005-09-07 | Dispense Systems Internat B V | Tapping rod. |
EP2826745A1 (en) | 2013-07-19 | 2015-01-21 | Micro Matic A/S | Overpressure valve of a spear tube valve |
WO2020198217A1 (en) | 2019-03-27 | 2020-10-01 | Newco 4 LLC | Device for providing a disposable bag in keg or other container |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1549733A (en) * | 1976-03-24 | 1979-08-08 | Micro Matic Bror Kruuse As | Self-closing extractor fittings for containers |
US4142658A (en) * | 1976-08-20 | 1979-03-06 | Gkn Sankey Limited | Closure unit for beer kegs |
US4159102A (en) * | 1977-09-28 | 1979-06-26 | Draft Systems, Inc. | Locking mechanism for coupler and valve assembly |
US4509663A (en) * | 1982-03-29 | 1985-04-09 | Draft Systems, Inc. | Locking mechanism and valve assembly |
US4612952A (en) * | 1985-02-25 | 1986-09-23 | Draft Systems, Inc. | Valve assembly and coupler therefor |
NL192449C (en) * | 1986-01-21 | 1997-08-04 | Vsh Fabrieken Bv | Tapping head for mounting on a tapping rod assembly of a vessel using a sealing ring. |
DE4303461C1 (en) * | 1993-02-06 | 1994-04-14 | Joachim Mogler | Tap head for keg fitting - comprises ring seal and slide guide contg. guide track for pushing tap head on to edge of plate of keg fitting |
-
1994
- 1994-02-25 DK DK023594A patent/DK172394B1/en not_active IP Right Cessation
-
1995
- 1995-02-24 AU AU17551/95A patent/AU1755195A/en not_active Abandoned
- 1995-02-24 EP EP95906832A patent/EP0682640B1/en not_active Expired - Lifetime
- 1995-02-24 CZ CZ19952752A patent/CZ287474B6/en not_active IP Right Cessation
- 1995-02-24 DE DE69501181T patent/DE69501181T2/en not_active Expired - Fee Related
- 1995-02-24 ES ES95906832T patent/ES2110831T3/en not_active Expired - Lifetime
- 1995-02-24 AT AT95906832T patent/ATE161002T1/en not_active IP Right Cessation
- 1995-02-24 WO PCT/DK1995/000084 patent/WO1995023112A1/en active IP Right Grant
- 1995-02-24 PL PL95310972A patent/PL177836B1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9523112A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5882856A (en) * | 1995-06-07 | 1999-03-16 | Genzyme Corporation | Universal primer sequence for multiplex DNA amplification |
NL1010768C2 (en) | 1998-12-09 | 2000-06-13 | Dispense Systems International | Shut-off valve. |
EP3950571A4 (en) * | 2019-03-26 | 2023-01-11 | Knyazev, Sergey Vladimirovich | Fitting for a pet keg |
Also Published As
Publication number | Publication date |
---|---|
DK23594A (en) | 1995-08-26 |
DK172394B1 (en) | 1998-05-18 |
ATE161002T1 (en) | 1997-12-15 |
DE69501181T2 (en) | 1998-04-09 |
PL310972A1 (en) | 1996-01-22 |
DE69501181D1 (en) | 1998-01-22 |
WO1995023112A1 (en) | 1995-08-31 |
AU1755195A (en) | 1995-09-11 |
PL177836B1 (en) | 2000-01-31 |
EP0682640B1 (en) | 1997-12-10 |
CZ275295A3 (en) | 1996-03-13 |
CZ287474B6 (en) | 2000-12-13 |
ES2110831T3 (en) | 1998-02-16 |
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