EP1793176A2 - Disjoncteur hydraulique avec étanchéité renforcée - Google Patents
Disjoncteur hydraulique avec étanchéité renforcée Download PDFInfo
- Publication number
- EP1793176A2 EP1793176A2 EP20060120358 EP06120358A EP1793176A2 EP 1793176 A2 EP1793176 A2 EP 1793176A2 EP 20060120358 EP20060120358 EP 20060120358 EP 06120358 A EP06120358 A EP 06120358A EP 1793176 A2 EP1793176 A2 EP 1793176A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- valve body
- downstream
- drain valve
- cavity
- 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
- 238000007789 sealing Methods 0.000 title description 7
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims description 18
- 239000012530 fluid Substances 0.000 claims description 10
- 239000011796 hollow space material Substances 0.000 abstract 2
- 239000003651 drinking water Substances 0.000 description 8
- 235000020188 drinking water Nutrition 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 208000031872 Body Remains Diseases 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1083—Filling valves or arrangements for filling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2559—Self-controlled branched flow systems
- Y10T137/2574—Bypass or relief controlled by main line fluid condition
- Y10T137/2605—Pressure responsive
- Y10T137/2617—Bypass or relief valve biased open
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/3149—Back flow prevention by vacuum breaking [e.g., anti-siphon devices]
- Y10T137/3185—Air vent in liquid flow line
- Y10T137/3294—Valved
- Y10T137/3331—With co-acting valve in liquid flow path
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7838—Plural
- Y10T137/7841—One valve carries head and seat for second valve
Definitions
- the invention relates to a system separator for physically separating an upstream liquid system from a downstream liquid system by means of a drain valve depending on the pressure drop between upstream and downstream liquid system, with an upstream backflow preventer, a downstream backflow preventer and a piston designed as a discharge valve body, which is arranged between the fluid flow between the backflow preventer wherein upstream of the upstream backflow preventer an inlet pressure of the upstream liquid system, between the drain valve body and the downstream backflow preventer a mean pressure in a medium pressure space and downstream of the downstream backflow preventer an outlet pressure of the downstream liquid system, and wherein on the drain valve body the pressure difference between inlet pressure and mean pressure Counteracts the closing direction of a force acting in the opening direction on the discharge valve body loading spring, wherein the discharge valve body on the downstream side has an effective for the medium pressure pressure surface, which is smaller than the effective pressure for the input pressure surface, whereby a cavity is formed by the Ablouventil stresses, and the cavity communicates with the medium-pressure space.
- the upstream fluid system may be a drinking water system.
- the downstream fluid system may e.g. to be a heating system. It is essential to prevent contaminated water from the heating system from flowing back into the drinking water system when the heating system is being refilled or refilled, for example by the pressure in the drinking water system collapsing for some reason. There are so-called.
- Backflow preventer These are spring-loaded valves which allow fluid flow in only one direction, namely from the upstream to the downstream system. However, such backflow preventers can become leaky. Therefore, e.g. For drinking water and heating water, a separation of the liquid systems alone by backflow preventer not allowed. There must be a physical separation of the fluid systems so that in case of failure between the systems a connection to a drain and to the atmosphere is made.
- System or pipe dividers include an upstream backflow preventer connected to the upstream liquid system and a downstream backflow preventer connected to the downstream system. Between the backflow preventers is disposed a pressure controlled dump valve which establishes a passage from the upstream liquid system to the downstream liquid system when there is a sufficient pressure differential between the two liquid systems so that the liquid can safely flow only from the upstream to the downstream liquid system. If this pressure drop does not exist, the drain valve establishes a connection of the space between the backflow preventer with the atmosphere and a drain.
- the drain valve is a displaceable in a fitting housing piston.
- This piston has a central passage and at its downstream end face an annular valve seat, which comes to a valve-tight ring seal axially to the plant.
- the passage then establishes an atmosphere-closed connection between the upstream and downstream fluid systems.
- the upstream backflow preventer sits in the passage.
- the piston of the drain valve is first pressed against the action of the spring acting thereon in its operating position by the input pressure in the drinking water system, in which he the connection to Atmosphere and interrupts the process and establishes a connection between drinking water system and heating system. Then, the upstream and downstream backflow preventers are pressed. It streams drinking water to the heating system and fill it up or down. The heating system is then filled to an outlet pressure that is below the inlet pressure. In normal operation, the difference between inlet pressure and outlet pressure is determined by the pressure drop across the backflow preventers, that is, by the strength of the return valve springs.
- the intermediate pressure is in accordance with the pressure drop across the upstream backflow preventer and the pressure drop across the upstream backflow preventer.
- the pressure difference between the inlet pressure and the mean pressure must be greater than a limit determined by the loading spring of the valve body of the drain valve.
- a seat seal is arranged in the valve seat of the drain valve. This is acted on the one hand by the medium pressure. On the other hand, with the drain valve closed, the force of the drain valve body acts on the seal. If this force is not large enough, there is a risk of insufficient gasket.
- the force of the discharge valve body acting on the seal corresponds to the force exerted by the upstream liquid system minus the force exerted on the discharge valve body in the medium pressure space and the constant spring force of the spring acting on the discharge valve.
- the effective areas of the discharge valve are changed with unchanged pressure conditions in the inlet and in the medium-pressure space, the respective forces also change.
- the seat diameter of the valve seat of the drain valve so a greater sealing force can be achieved.
- the force acting in the closing direction force is so high at high pressures that the valve does not open.
- a system separator in which a stepped piston is guided as a drain valve body in a two-part housing.
- the stepped piston forms with a seat edge and an annular valve seat a drain valve.
- the valve seat has a smaller diameter than the input-side outer diameter of the stepped piston.
- the formed between the piston outer side and the housing, hollow annular space is limited on the side of the medium-pressure space with a housing-fixed, clamped between the input-side and output-side housing, annular housing partition.
- the hollow annulus is hydraulically connected to the medium-pressure chamber.
- the loading spring acting on the bleed valve body is disposed around the outside of the stepped piston.
- the housing partition wall forms the spring abutment. This arrangement is complex and bulky.
- the object is achieved in that a movable in the direction of movement of the Ablassventil stresses sliding seat is provided in the cavity, which is opposite the Ablassventiligen movable up to a housing fixed stop, which is arranged in the flow direction in front of the valve seat of the drain valve.
- the drain valve As the inlet pressure increases, the drain valve is first closed. Subsequently, the backflow preventer opens. Then prevails in the medium pressure chamber compared to the prevailing atmospheric pressure increased pressure. Via the connection between the cavity and the medium-pressure space, an increased pressure is built up in the cavity. This pressure acts on the movable sliding seat. The sliding seat is moved in the direction of the valve seat to the stop fixed to the housing. Conversely, the pressure in the cavity between the sliding seat, the housing and the drain valve body also acts "from the back" on the protruding part of the drain valve body. The effective area for the medium pressure is not reduced in this way despite smaller valve seat. Thus, the balance of forces on the drain valve body remains the same with reduced valve seat size. However, the sealing force is greater because the seal has a smaller area. Accordingly, the contact pressure and the quality of the seal increases.
- the outlet-side diameter of the discharge valve body is smaller than the inlet-side diameter
- the sliding seat is formed by an annular sleeve, which is movably guided in the cavity formed by the difference in diameter between the drain valve body and housing.
- the discharge valve body thus forms a cavity between the housing and the piston between the inlet-side, thicker end and the outlet-side end. In this cavity, the sleeve can move.
- the housing-fixed stop can be formed by an annular step inside the housing. At medium pressure in the cavity, the sleeve is pressed against the stop. The housing then absorbs part of the pressure. In this way, a particularly compact arrangement is achieved.
- the annular sleeve has an L-shaped cross-section, one leg of which comes to rest with the inside when exposed to medium pressure on the stop.
- a channel may be provided for connecting the interior of the discharge valve body with the cavity, which is formed in the region between the housing, the drain valve body and the sliding seat.
- This channel can be made, for example, by a simple bore or annulus with lands.
- the channel of the cavity may initially extend radially inwardly and then in the axial direction downstream of the medium-pressure space.
- a first seal is provided, which is arranged in an annular groove on the outside in the drain valve body in the region of larger diameter and a second seal, which is arranged in the cavity between the channel and the movable sliding seat.
- the backflow preventer, the drain valve body, the loading spring, the housing and the sliding seat are arranged coaxially.
- 10 denotes a tubular fitting housing.
- the fitting housing 10 has an inlet 12 and at the opposite end an outlet 14.
- a cylindrical chamber 16 is formed in the fitting housing 10.
- a piston-shaped valve body 18 is guided in the chamber 16.
- Ablas 20 From the chamber 16 is a Ablas 20, which has a connected to the atmosphere outlet pipe 22.
- valve body 18 is sealingly guided in the cylindrical chamber 16 on its lateral surface 24 with a seal 26. At its downstream end face 28, the valve body 18 forms an annular valve seat 30. The valve seat 30 abuts a seat seal 32 in the downstream end position shown in FIG. With the lateral surface 30 of the valve body 18 covers the Ablas 20. This is a drain valve 34th
- the valve body 18 has a central passage 36. On the valve body 18, an inwardly projecting, annular disk-shaped edge 38 is formed at the upstream end. In the passage 36 sits an upstream backflow preventer 40. In the housing 42 of the backflow preventer sits a valve seat 44. The valve seat 44 cooperates with a valve closing body 46.
- the valve closing body 46 has a head 48 and a shaft 50.
- the shaft 50 is guided in an opening 61 of the housing 42.
- the shaft 50 is surrounded by a coil spring 52.
- the coil spring 52 is guided with one end 54 in an annular groove 56 in the housing 42 and abuts the head 48 with the other end 58.
- a coil spring 60 is supported on a shoulder 62 on the inside of the fitting housing 10 and abuts upstream on the downstream, rear side of the valve body 18. As a result, the valve body 18 of the discharge valve is loaded by the spring 60. The spring 60 ensures that the drain valve is always open without further forces.
- a backflow preventer 64 is seated in the fitting housing.
- the backflow preventer 64 is basically similar in structure to the upstream backflow preventer 40 and therefore not described in detail. Both backflow preventers 40 and 64 open only in the direction from the inlet pressure to the outlet pressure. Between the valve body 18 and the downstream backflow preventer 64, a medium-pressure space 66 is formed.
- the coil spring 52 of the backflow preventer 40 is stronger than the coil spring 60 acting on the valve body 18. Therefore, the backflow preventer 40 opens only when the valve body 18 is moved to its downstream end position by the pressure difference between inlet pressure and the mean pressure prevailing in the medium-pressure space. In this way, when the passage to the outlet port with respect to the outlet 14 and the atmosphere is completed, the backflow preventer is pressed by the water pressure.
- the heating system is filled to an outlet pressure slightly below the inlet pressure.
- the drain valve body 18 is shown in detail with the drain valve open.
- the upstream backflow preventer 40 is closed.
- the spring 60 is relaxed. In this state, the drain valve body is in a stopper position at a distance from the seat seal 32.
- the discharge valve body 18 has a diameter on the input side, which is designated by "D” in FIG.
- the diameter corresponds to the inner diameter of the tubular fitting housing 10.
- the drain valve body 18 further forms an annular step 70, so that the downstream side has a smaller diameter. This smaller diameter is designated by “d” in FIG.
- the inlet pressure thus acts on a surface which is determined by the diameter D.
- an annular cavity 74 is formed between the discharge valve body and the inside of the fitting housing 10.
- a sliding seat 76 is guided.
- the sliding seat 76 has an L-shaped cross-section with legs 78 and 80.
- the sliding seat 76 is movably guided in the axial direction.
- a sealing ring 82 is provided in the cavity 74. Via a channel 82, the cavity 74 is hydraulically connected to the medium-pressure chamber.
- a seal 88 is provided between the step 70 and the slide seat 76.
- the medium pressure prevailing in the medium-pressure chamber 66 is also present in the cavity 74.
- the mean pressure corresponds to the atmospheric pressure.
- the bleed valve 34 is closed, the medium pressure increases with increasing inlet pressure. This situation is shown in FIG.
- the sliding seat 76 moves to the right in the illustration.
- valve seat seal 32 has a reduced diameter. Since the forces on the valve body remain unchanged under unchanged pressure conditions, the contact pressure on the seat seal 32 but larger. This increases the sealing force.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Check Valves (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06120358T PL1793176T3 (pl) | 2005-10-11 | 2006-09-08 | Izolator przepływu zwrotnego o wzmocnionej sile uszczelniającej |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510049110 DE102005049110B4 (de) | 2005-10-11 | 2005-10-11 | Dichtkraftverstärkter Rohrtrenner |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1793176A2 true EP1793176A2 (fr) | 2007-06-06 |
EP1793176A3 EP1793176A3 (fr) | 2008-12-24 |
EP1793176B1 EP1793176B1 (fr) | 2012-12-19 |
Family
ID=37698305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20060120358 Active EP1793176B1 (fr) | 2005-10-11 | 2006-09-08 | Disjoncteur hydraulique avec étanchéité renforcée |
Country Status (7)
Country | Link |
---|---|
US (1) | US7575016B2 (fr) |
EP (1) | EP1793176B1 (fr) |
AU (1) | AU2006222658B2 (fr) |
DE (1) | DE102005049110B4 (fr) |
ES (1) | ES2400579T3 (fr) |
PL (1) | PL1793176T3 (fr) |
ZA (1) | ZA200608089B (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007005215B3 (de) * | 2007-01-29 | 2008-06-19 | Hans Sasserath & Co Kg | Systemtrenner |
DE102008023921A1 (de) | 2007-05-16 | 2009-02-12 | Desch, Kurt Michael, Dipl.-Ing. (FH) | Absicherung gegen Rücksaugen von Badewannenwasser und Bodenzufluß mit Niveautrennung des zulaufenden Mischwassers und des ablaufenden Wannenwassers |
DE102008023894A1 (de) | 2007-09-25 | 2009-04-02 | Desch, Kurt Michael, Dipl.-Ing. (FH) | Badewannen-Bodenzufluss mit Niveautrennung des zulaufenden Mischwassers und des ablaufenden Wannenwassers, gegen Rücksaugen abgesichert mit einer externen, handelsüblichen Sicherungseinrichtung, die mindestens 150 mm über dem oberen Wannenrand ist |
US9504214B1 (en) * | 2014-10-06 | 2016-11-29 | Bryan L. Towsley | Anti-siphon valve with freeze protection |
CA3101925A1 (fr) * | 2018-05-30 | 2019-12-05 | Giacomini S.P.A. | Dispositif de non-retour a zone de pression reduite |
CN109268334A (zh) * | 2018-11-20 | 2019-01-25 | 台州巨力工具有限公司 | 一种用于液压工具的单向阀及液压工具 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0088861A2 (fr) | 1982-03-15 | 1983-09-21 | Lang Apparatebau Gmbh | Soupape anti-retour spécialement pour des conduites d'eau potable |
DE202005008021U1 (de) | 2005-05-21 | 2005-07-21 | Vollmer, Rudolf | Systemtrenner |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4013088A (en) * | 1975-05-19 | 1977-03-22 | Braukmann Armaturen Ag | Valve structure |
US4284097A (en) * | 1978-03-28 | 1981-08-18 | Amtrol Inc. | In line back flow preventer |
US5228470A (en) * | 1992-01-22 | 1993-07-20 | A. W. Cash Valve Manufacturing Corporation | Self draining hose connection dual check valve back flow preventer |
DE19854951C2 (de) * | 1998-11-27 | 2001-11-15 | Rudolf Vollmer | Systemtrenner |
DE19902574C1 (de) * | 1999-01-22 | 2000-10-05 | Rudolf Vollmer | Systemtrenner |
PL359448A1 (en) * | 2002-04-03 | 2003-10-06 | Hans Sasserath & Co Kg | Set of isolating valves for water supply system |
DE10214747A1 (de) * | 2002-04-03 | 2003-10-16 | Sasserath & Co Kg H | Ventilanordnung für einen Rohrtrenner |
DE20305410U1 (de) * | 2003-04-03 | 2003-07-10 | Gruenbeck Josef Wasseraufb | Systemtrenner |
-
2005
- 2005-10-11 DE DE200510049110 patent/DE102005049110B4/de active Active
-
2006
- 2006-09-08 EP EP20060120358 patent/EP1793176B1/fr active Active
- 2006-09-08 PL PL06120358T patent/PL1793176T3/pl unknown
- 2006-09-08 ES ES06120358T patent/ES2400579T3/es active Active
- 2006-09-22 AU AU2006222658A patent/AU2006222658B2/en not_active Ceased
- 2006-09-28 ZA ZA200608089A patent/ZA200608089B/xx unknown
- 2006-10-10 US US11/546,466 patent/US7575016B2/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0088861A2 (fr) | 1982-03-15 | 1983-09-21 | Lang Apparatebau Gmbh | Soupape anti-retour spécialement pour des conduites d'eau potable |
DE202005008021U1 (de) | 2005-05-21 | 2005-07-21 | Vollmer, Rudolf | Systemtrenner |
Also Published As
Publication number | Publication date |
---|---|
US20070079873A1 (en) | 2007-04-12 |
EP1793176B1 (fr) | 2012-12-19 |
AU2006222658B2 (en) | 2011-03-17 |
DE102005049110A1 (de) | 2007-04-19 |
ZA200608089B (en) | 2007-12-27 |
EP1793176A3 (fr) | 2008-12-24 |
US7575016B2 (en) | 2009-08-18 |
ES2400579T3 (es) | 2013-04-10 |
PL1793176T3 (pl) | 2013-04-30 |
AU2006222658A1 (en) | 2007-04-26 |
DE102005049110B4 (de) | 2007-05-31 |
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