WO1994001228A1 - Vorrichtung zur reinigung von rohrleitungen - Google Patents
Vorrichtung zur reinigung von rohrleitungen Download PDFInfo
- Publication number
- WO1994001228A1 WO1994001228A1 PCT/EP1993/001600 EP9301600W WO9401228A1 WO 1994001228 A1 WO1994001228 A1 WO 1994001228A1 EP 9301600 W EP9301600 W EP 9301600W WO 9401228 A1 WO9401228 A1 WO 9401228A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- sealing
- locking part
- control surface
- sealing part
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0323—Arrangements specially designed for simultaneous and parallel cleaning of a plurality of conduits
Definitions
- the invention relates to a device for cleaning pipelines, in particular dispensing lines, with an automatically operating four-way switching valve with a housing, which has an inlet connection and an outlet connection for a cleaning liquid, two pipe connections and a socket for receiving a displaceable by the pressure of the cleaning liquid Ren piston with two valve openings provided in a control surface, wherein a valve stub is inserted in the inlet connection.
- a pipe to be cleaned for example a beer line
- the cleaning liquid such as lye, acid, rinse water and disinfectant solution
- the cleaning liquid is transferred to the four-way switch valve via the in the Inlet connection supplied valve stub fed.
- the cleaning liquid first flows through a valve opening into a channel opening into one end face of the piston and from there into a beer line and further through the other beer line into the other channel and the second valve opening back into the drain connection.
- Cleaning bodies designed as sponges are taken along. As soon as they hit the piston of the changeover valve and close the channel mouth there, the piston is moved and the direction of flow is reversed.
- valve stub when the valve stub is inserted into the inlet connection, it is not always reliably achieved that the valve stub sits on the control surface on the piston in a sealing manner, but on the other hand unhindered Back and forth movement of the piston is ensured. For example, if the valve neck is screwed too far into the inlet connection, the reciprocating movement of the piston is inhibited or excluded.
- valve stub If, on the other hand, the valve stub is not screwed in far enough into the inlet connection, the valve stub does not sit sealingly on the control surface of the piston, and depending on the position of the valve openings, at least some of the cleaning fluid flows in an uncontrolled manner and bypassing the one to be cleaned Pipes for drain connection.
- DE-OS 39 01 829 it is known to provide a firmly screwed-in and secured by a lock nut valve spigot on the inside with a slide spigot which moves radially outwards when an overpressure occurs and thereby releases openings of a relief path in the valve spigot.
- the slide connector has a bead with a pressure application surface which can be acted upon by the pressure of the cleaning fluid and which is larger than the outwardly directed end faces of the slide connector.
- a non-generic cleaning device is known in which a valve slide can be pushed back and forth between two operating positions.
- valve stub has an outer locking part and a sealing part arranged movably therein, which carries a pressure engaging surface which is enlarged compared to the end face and which can be acted upon by the pressure of the cleaning liquid, so that the sealing part has a axially acting force can be pressed with its end face against the control surface.
- the sealing part is pressed under the influence of the pressure of the cleaning liquid with its end face against the control surface on the piston, where it lies sealingly but does not impair the movement of the piston.
- the pressurized cleaning liquid which is necessary anyway to operate the device according to the invention, not only performs the cleaning function and the switching function, but also effects the positional adjustment of the sealing part of the valve stub.
- a higher pressure of the cleaning liquid which requires a higher sealing force, automatically ensures a stronger contact pressure between the end face and the control surface and, at the same time, a higher switching force. Overall, however, relatively lower forces are sufficient.
- the pressure of the water pipe or a low pump output are therefore sufficient to operate the device according to the invention.
- the sealing part fulfills its functions regardless of the installation position of the valve stub by being movably arranged in the locking part. In the simplest case, no additional elements need be provided to generate the axial force. In some cases, however, it is advantageous to additionally load the sealing part with a spring and / or with elastic sealing elements that are under tension. Such sealing elements also seal the gap between the sealing part and a bore in the interior of the locking part.
- the sealing part is essentially cylindrical, has a circumferential bead at its end arranged in the locking part and is arranged in a correspondingly stepped bore of the locking part.
- the bead can serve as a contact surface for the spring generating the axial force or the sealing element.
- the bead can form the stop for the maximum possible axial movement of the sealing part and come to rest on a shoulder of the stepped bore of the locking part.
- the bead can also take on a further function: the sealing part can also be sealed against the locking part via it.
- it has a circumferential annular groove in which, for example, an O-ring is arranged. This embodiment is particularly considered when a spring or the cleaning fluid generates the axial force.
- the locking part carries a sealing ring and further outside an external thread for fastening to the inlet connection, and that the bore section receiving the bead ends in the middle of the external thread.
- the sealing ring seals the locking part against the inlet connection. There is sufficient space in the bore section of the locking part that receives the bead for receiving the bead.
- the locking part has proven to be advantageous for the locking part to have an outer stop for fixing its installation position in the inlet connection. Up to this outer stop, the locking part can be easily screwed into the inlet connection. The resulting installation position in the inlet connection is sufficiently stable to withstand the pressure of the cleaning liquid. On the other hand, the installation position is determined such that the sealing part can reach the control surface on the piston under the influence of the axial force of the spring or the sealing elements or the cleaning liquid.
- the locking part has an inner stop as a further contact surface for the sealing elements or the spring which generate the axial force.
- This stop can be configured, for example, as a ring fastened in the bore of the locking part, which is fastened with the aid of a snap ring. But it is also conceivable that in the
- Bore of the locking part of a flange is arranged as a contact surface. It has also proven useful that the flow channel tapers conically at the inlet of the sealing part. Because of this cone inlet, there are less losses. Furthermore, the noise of the flowing cleaning fluid is reduced.
- the end face of the sealing part is provided with an elastic sliding layer. This improves the tightness of the control surface and the smooth running of the piston.
- the use of the elastic sliding layer is possible because the pressure conditions on the end face are defined.
- the elastic sliding layer has a lip which projects into the flow cross section.
- a force which can be used for pressure and which is effective alone or in conjunction with other forces is generated on the lip.
- FIG. 1 shows a side view of a device according to the invention for cleaning pipelines, partly in section
- FIG. 2 shows a first alternative embodiment of the valve neck of the device according to the invention
- FIG 3 shows a second alternative embodiment of the valve neck of the device according to the invention.
- a device 1 for cleaning pipes has an automatically working in a housing 2 Four-way switch valve 3 on.
- An inlet connection 4 and an outlet connection 5 for a cleaning liquid and two pipe connections 6 are arranged on the housing 2.
- the housing 2 has a bushing 7 for receiving a piston 8 which can be displaced perpendicularly to the plane of the drawing and which in turn has two valve openings 10 in a control surface 9.
- a valve stub 11 is inserted into the inlet connection 4 and extends up to the control surface 9 of the piston 8.
- the valve stub 11 has an outer locking part 12 and a sealing part 13 movably arranged therein, which is pressed with its end face 14 against the control surface 9 of the piston 8 by an axially acting force. In the embodiment shown in FIG. 1, the axial force is generated by the pressure of a cleaning fluid flowing through the valve stub 11.
- the locking part 12 is connected via an external thread 15 to the inlet connection 4. It is sealed against the inlet connection 4 with the aid of a sealing ring 16. A water connection, not shown, is screwed onto another thread 17, for example. To determine the installation length of the locking part 12 in the inlet connection 4, it has an outer stop 18. In the interior of the locking part 12, the essentially cylindrical sealing part 13 is arranged axially movable in a stepped bore 19. With its end face 14, it sits sealingly on the control face 9 of the piston 8 of the four-way changeover valve 3, without impeding the reciprocation of the piston 8 to reverse the direction of flow of the cleaning liquid.
- the sealing part 13 At its end opposite the end face 14, the sealing part 13 has a circumferential bead 20, the bore portion 21 of the bore 19 of the locking part 12 receiving the bead in the area of the external thread. the 15 lies.
- the bulge 20 forms a pressure application area on the sealing part 13 for the cleaning liquid which is enlarged compared to the end face 14. It is sealed with an O-ring 22 against the bore 19.
- sealing part 33 loaded by elastic, energized sealing elements 35. These produce, optionally together with the pressure of the cleaning liquid acting on the bead 34, the axial force which presses the sealing part 33 against the control surface of the piston of a device according to the invention for cleaning pipelines, which is not shown in FIG. 2.
- the sealing elements 35 are mounted between a bead 34 arranged on the essentially cylindrical sealing part 33 and a circumferential ring 36 forming an inner stop in the bore section 38 of the locking part 32.
- the ring 36 is fixed with the aid of a snap ring 37.
- the locking part 32 is constructed essentially in accordance with the embodiment shown in FIG.
- the sealing member 43 of the valve stub 41 is loaded by a spring 44.
- This spring 44 together with the pressure of the cleaning liquid acting on the bead 46, generates the axial force which the sealing part 43 presses against a control surface (not shown in more detail)
- the sealing part 43 is essentially cylindrical and, in the middle of its length, has a bead 46 which is sealed against the locking part 42 by a sealing ring 47. A pressed one
- Support ring 49 lies against a step 50 of the bore 48. Its front surface serves as a contact surface for the spring 44, while the end face 51 of the bead 46 forms the other contact surface.
- the locking part 42 is constructed in accordance with the embodiments in FIGS. 1 and 2.
- the end face 40 is provided in FIG. 2 with a sliding layer 52 and the end face 45 in FIG. 3 with a sliding layer 53.
- the sliding layer consists of an elastic material, such as soft rubber or soft PVC, it compensates for small differences between the end face and the control face and reduces the friction between these faces.
- the sliding layer can be applied by dipping, glued on or attached in some other way.
- the sliding layer has an inwardly projecting lip 54 which, in addition to the force of the spring 44 and the pressure acting on the bead 46 under the influence of the flow, produces part of the pressing force for the end face 45.
- the sealing part 43 can also be provided with an outer flange at the inlet end and in this way the pressure force generated by the water pressure can be increased.
- a cone 55 at the inlet improves the flow conditions.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
- Cleaning In General (AREA)
- Devices For Dispensing Beverages (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93914700A EP0602216A1 (de) | 1992-07-01 | 1993-06-23 | Vorrichtung zur reinigung von rohrleitungen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4221577.3 | 1992-07-01 | ||
DE4221577A DE4221577C2 (de) | 1992-07-01 | 1992-07-01 | Vorrichtung zur Reinigung von Rohrleitungen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994001228A1 true WO1994001228A1 (de) | 1994-01-20 |
Family
ID=6462229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1993/001600 WO1994001228A1 (de) | 1992-07-01 | 1993-06-23 | Vorrichtung zur reinigung von rohrleitungen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0602216A1 (de) |
DE (1) | DE4221577C2 (de) |
WO (1) | WO1994001228A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0351664A2 (de) * | 1988-07-21 | 1990-01-24 | Friedrich Bersch | Vorrichtung zur Reinigung von Rohrleitungen, inbesondere Schankleitungen |
EP0379882A2 (de) * | 1989-01-23 | 1990-08-01 | Friedrich Bersch | Vorrichtung zum Reinigen von Rohrleitungen |
DE3928194A1 (de) * | 1989-08-25 | 1991-02-28 | Breitwisch Josef & Co | Vierwege-umschaltventil fuer eine vorrichtung zur reinigung von rohrleitungen |
EP0437733A1 (de) * | 1989-12-23 | 1991-07-24 | Rudolf Till | Vorrichtung zum Reinigen und Entleeren von Flüssigkeitsleitungen, insbesondere Getränkeleitungen in Zapfanlagen |
-
1992
- 1992-07-01 DE DE4221577A patent/DE4221577C2/de not_active Expired - Fee Related
-
1993
- 1993-06-23 WO PCT/EP1993/001600 patent/WO1994001228A1/de not_active Application Discontinuation
- 1993-06-23 EP EP93914700A patent/EP0602216A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0351664A2 (de) * | 1988-07-21 | 1990-01-24 | Friedrich Bersch | Vorrichtung zur Reinigung von Rohrleitungen, inbesondere Schankleitungen |
EP0379882A2 (de) * | 1989-01-23 | 1990-08-01 | Friedrich Bersch | Vorrichtung zum Reinigen von Rohrleitungen |
DE3928194A1 (de) * | 1989-08-25 | 1991-02-28 | Breitwisch Josef & Co | Vierwege-umschaltventil fuer eine vorrichtung zur reinigung von rohrleitungen |
EP0437733A1 (de) * | 1989-12-23 | 1991-07-24 | Rudolf Till | Vorrichtung zum Reinigen und Entleeren von Flüssigkeitsleitungen, insbesondere Getränkeleitungen in Zapfanlagen |
Also Published As
Publication number | Publication date |
---|---|
EP0602216A1 (de) | 1994-06-22 |
DE4221577C2 (de) | 1995-04-13 |
DE4221577A1 (de) | 1994-01-05 |
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