EP4043652A1 - Interrupteur de conduite et système de rinçage en étant équipé - Google Patents

Interrupteur de conduite et système de rinçage en étant équipé Download PDF

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Publication number
EP4043652A1
EP4043652A1 EP21157024.7A EP21157024A EP4043652A1 EP 4043652 A1 EP4043652 A1 EP 4043652A1 EP 21157024 A EP21157024 A EP 21157024A EP 4043652 A1 EP4043652 A1 EP 4043652A1
Authority
EP
European Patent Office
Prior art keywords
pipe
outlet
ventilation
section
line
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.)
Pending
Application number
EP21157024.7A
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German (de)
English (en)
Inventor
Erfindernennung liegt noch nicht vor Die
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LAUFEN KERAMIK HOLDING
Keramik Holding AG Laufen
Original Assignee
LAUFEN KERAMIK HOLDING
Keramik Holding AG Laufen
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LAUFEN KERAMIK HOLDING, Keramik Holding AG Laufen filed Critical LAUFEN KERAMIK HOLDING
Priority to EP21157024.7A priority Critical patent/EP4043652A1/fr
Publication of EP4043652A1 publication Critical patent/EP4043652A1/fr
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/102—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using an air gap device
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve

Definitions

  • the present invention relates to a pipe interrupter and a flushing system equipped with a pipe interrupter.
  • An important safety criterion in the drinking water installation is the avoidance of flows against the normal flow direction in the pipe network.
  • Contaminated water could flow back into the drinking water supply network from containers (bathtub, toilet cistern, swimming pool).
  • back pressure the pressure in a part of the system is higher than in the supply network.
  • back suction if a partial vacuum occurs in a system part. This can be caused, for example, by a burst pipe, activation of pressure boosting and fire extinguishing pumps, etc.
  • the European standard EN 1717 therefore prescribes the installation of safety devices for drinking water installations, which are intended to prevent undesired backflow.
  • safety devices are pipe separators, pipe interrupters, pipe aerators and backflow preventers.
  • the present invention deals exclusively with the so-called pipe interrupters, such as are typically used in shower and toilet installations.
  • a pipe interrupter is a (relatively short) piece of pipe with a permanent side opening that is designed in such a way that drinking water flowing through the piece of pipe does not escape through this opening as far as possible. As soon as overpressure occurs in the part of the line downstream from the pipe interrupter or underpressure occurs in the upstream drinking water installation, the overpressure is reduced or the underpressure is compensated for via this opening.
  • Pipe interrupters are usually only traversed by drinking water when a tap is opened. If there is a suck-back effect in the drinking water pipe, for example due to a burst pipe, the resulting negative pressure is reliably released from the interior of the pipe interrupter via the openings in the pipe interrupter, which serve as a connection to the atmosphere. It is not possible to suck in non-potable water, for example dirty toilet water, via the pipe interrupter.
  • Pipe interrupters are primarily used for individual protection, with each extraction point and each device that could pose a risk or damage to the drinking water being individually protected.
  • the object of the present invention is to create a pipe interrupter of the generic type which can be used in more modern flushing installations.
  • the pipe interrupter should work purely in terms of fluid mechanics.
  • the pipe interrupter ensures maximum resistance to water attempting to flow out through the ventilation duct, while at the same time providing a sufficiently low resistance to air flow from the outside to the inside.
  • the lowest possible pressure or energy loss of the water flowing through the pipe interrupter is achieved.
  • This invention relates to a pipe interrupter as specified by the features of the independent claim. Further advantageous aspects of the pipe interrupter according to the invention result from the features of the dependent patent claims.
  • the pipe interrupter has a pipe with an inlet and an outlet. At least one ventilation line with an inner orifice and an outer orifice is arranged between the inlet and the outlet.
  • the ventilation line connects the interior of the pipe with the exterior of the pipe and is designed in such a way that water flowing through the pipe does not escape through the ventilation line.
  • the tube has an inlet section that continuously narrows on the inside, pointing away from the inlet, and an outlet section that widens continuously on the inside, pointing toward the outlet, and a transition section arranged between the inlet section and the outlet section.
  • the inner opening of the at least one ventilation line is arranged in this transition section.
  • the Venturi-like design of the pipe interrupter causes the static pressure of the water flowing through the pipe to be greatly reduced in the area of the transition section, but then increased again in the outlet section. Because of the greatly reduced static pressure of the water in the transition section, the arrangement of the outlet opening of the aeration line is optimal in this area and prevents water from escaping laterally through the aeration line.
  • the design of the pipe interrupter creates a maximum pressure drop for water attempting to flow through the vent ducts from the inside to the outside, while at the same time ensuring a sufficiently low resistance to the flow of air through the vent duct from the outside to the inside.
  • a guide surface is preferably arranged in the transition section in front of the inner outlet opening of the at least one aeration line, which guides water flowing through the pipe away from the outlet opening. This prevents water from entering the ventilation line directly.
  • the guide surface is arranged in the interior of the pipe interrupter and radially inward in front of the inner orifice.
  • the guide surface is arched.
  • the guide surface is curved inward, for example concave in shape. This is particularly favorable in terms of flow technology.
  • the guide surface is preferably connected to the tube in the transition section, for example molded onto it, welded onto it or produced directly together with the tube.
  • the at least one aeration line preferably extends in the longitudinal direction of the pipe.
  • the at least one aeration line can be straight or helical.
  • the at least one ventilation line is preferably arranged straight in the longitudinal direction of the pipe interrupter. This is particularly simple in terms of manufacturing technology.
  • a helical configuration of a ventilation line allows the ventilation line to be longer and can thus prevent water from escaping through the ventilation line to an even greater extent.
  • the at least one aeration line extends from the inside to the outside, that is to say downstream, in the direction of the outlet of the pipe. This leads to a compact construction of the pipe interrupter.
  • the at least one ventilation line extends from the inside to the outside, that is to say upstream, in the direction of the inlet of the pipe. This counteracts the leakage of water through the ventilation line.
  • the inner opening of the at least one aeration line is preferably directed radially inwards.
  • the outer opening of the at least one aeration line is preferably directed radially outwards.
  • a protective shield preventing the ingress of dirt is preferably arranged on the outside of the pipe in the area of the outer outlet opening of the at least one ventilation line.
  • the baffle covers the outer orifice but is spaced therefrom to allow air to flow through.
  • the tube preferably has two or more ventilation lines, each with an inner opening and an outer opening.
  • the inner openings of the two or more aeration lines are mutually offset in the transition section in the circumferential direction of the pipe. As a result, particularly effective ventilation can be achieved.
  • Guide surfaces are preferably arranged in the transition section in front of the inner outlet openings of the two or more aeration lines, which direct water flowing through the pipe away from the outlet openings. This prevents water from entering the ventilation lines directly.
  • all guide surfaces are arched. All guide surfaces are preferably curved inwards, for example in a concave shape. The curvature of the guide surfaces is advantageous in terms of flow technology.
  • the guide surfaces are preferably designed and arranged at a distance from one another in such a way that water flowing through the pipe in regions between the guide surfaces is not diverted away from the inner wall of the pipe. This facilitates flow reattachment to the inner wall of the outlet section downstream of the vanes.
  • the invention also relates to a flushing system having a sink and a flushing line for connecting the sink to a drinking water supply network.
  • the flushing line has a vertical section and a pipe interrupter according to the invention is arranged in this vertical section.
  • the 1 illustrates the flushing system according to the invention using the example of a toilet flushing system.
  • the flushing system comprises a flushing basin S designed here as a toilet bowl, which can be connected or, in practical use, is connected to a drinking water supply network W via a flushing line having three sections La, Lb and Lc.
  • a valve V is located in the first line section La, and a pipe interrupter R according to the invention is inserted into the second line section Lb.
  • the third line section Lc leads to the sink S.
  • the second line section Lb runs vertically in practical use, and thus the pipe interrupter R is also oriented vertically in practical use.
  • the pipe interrupter R comprises a continuous pipe 100 with a longitudinal axis A, which has an inlet 110 and an outlet 120 at its two longitudinal ends.
  • the two end regions of the pipe 100 are externally provided with a thread 111 and 121, respectively, which serve to connect the pipe 100 to supply and discharge lines, not shown here.
  • the pipe interrupter R is arranged vertically, with the pipe 100 being traversed by flushing water in the direction of the arrow 101 from top to bottom.
  • a connection of the pipe interrupter R using a thread is useful. In doing so, as in 2 shown, two external threads, but also two internal threads, or an external thread and an internal thread can be provided. Other types of connection are also possible, for example hose connections, welding or gluing.
  • the sectional view of 3 shows the internal design of the pipe interrupter R according to 2 .
  • the tube 100 In its interior, the tube 100 has an inlet section 130 that continuously narrows away from the inlet 110 and an outlet section 140 that continuously widens on the inside in the direction of the outlet 120 .
  • a transition section 150 which forms the narrowest point in the pipe 100 , is arranged between the inlet section 130 and the outlet section 140 .
  • the transition section 150 has a substantially constant flow cross section,
  • the inlet section 130, the transition section 150 and the outlet section 140 of the pipe 100 together form a Venturi geometry which causes the flushing water flowing through the pipe 100 to first be accelerated and then, after passing the transition section 150, to be decelerated again.
  • the static pressure of the flushing water is greatly reduced and then increased again after passing through the transition section 150 .
  • the static pressure in the flushing water is thus converted into the dynamic pressure of the flow and then a corresponding conversion back takes place.
  • the inlet section 130 is shaped such that the pressure in the transition section 150 is at or below the ambient atmospheric pressure outside the pipe interrupter.
  • the pipe interrupter R is equipped here with, for example, four ventilation lines 160, two of which are in the sectional drawing Fig.3 you can see.
  • the Ventilation ducts are formed in the wall of the tube 100 and each have an inner orifice 161 and an outer orifice 162 .
  • the ventilation lines 160 run in the wall of the pipe 100 straight in the longitudinal direction of the pipe 100.
  • the outer outlet openings 162 are located downstream, i.e. closer to the outlet 120 than the inner outlet openings 161.
  • the inner outlet openings 161 open out radially into the transition section 150.
  • the outer orifices open radially below the transition section 150 into the outer space of the pipe 100.
  • the aeration lines 160 with their inner and outer orifices 161 and 162 are arranged at a distance from one another in the circumferential direction of the pipe 100.
  • the (here four) ventilation lines 160 connect the interior of the pipe 100 with the surrounding exterior of the pipe 100. They are used to supply air to the interior of the pipe interrupter in the event that the pipe system in which the pipe interrupter R is arranged in practical use, a negative pressure occurs. Air can enter the pipe 100 through the ventilation lines 160, as a result of which potentially contaminated flushing water is prevented from being sucked back upwards through the pipe interrupter and back into the drinking water supply network.
  • the arrangement of the inner openings 161 of the aeration lines 160 in the transition section 150 is optimal because at this point the static pressure of the rinsing water is greatly reduced and as a result no rinsing water escapes laterally through the aeration lines during the rinsing process.
  • curved guide surfaces 170 are preferably arranged in the transition section 150 in front of the inner orifice openings 161 . These cover the inner outlet openings 161 and direct the flushing water flowing through locally, ie in the area of the inner outlet openings 161 away from the inner wall of the transition section 150 .
  • the baffles 170 are optimized in terms of arrangement, shape and size so that they effectively keep the flushing water flowing through away from the inner outlet openings 161, but at the same time represent only a minimal disruption point for the actual ventilation.
  • the inwardly curved design of the guide surfaces 170 contributes to this.
  • the individual guide surfaces are spaced from each other on the inside of the pipe, preferably completely in the transition area.
  • a peripheral collar-shaped protective screen 180 is arranged on the outside of the pipe, which covers the outer openings 162 of the ventilation lines 160 .
  • the protective screen is open at the bottom.
  • the formation and arrangement of the guide surfaces 170 and the protective screen 180 is clearer from the perspective view of the 4 to recognize.
  • the figure 5 shows a detailed section of the pipe interrupter in a transparent representation.
  • the aeration lines 160 with the inner and outer outlet openings 161 and 162, respectively, and the baffles 170 can also be seen more clearly here.
  • top and bottom views of the Figures 6 and 7 in the direction of the axis of the pipe also clarify the structure of the pipe interrupter. while showing 6 the view from above in the flushing water flow direction in the pipe interrupter R and the 7 the view from below against the flushing water flow direction into the pipe interrupter R.
  • FIGS Figures 8 and 9 a second exemplary embodiment of the pipe interrupter according to the invention is shown. It differs from the embodiment of Figures 2 to 7 essentially due to the shape and arrangement of the ventilation ducts, all other components are similar or identical and have the same reference numbers as in FIGS Figures 2 to 7 designated.
  • the tube 100 comprises an inlet 110 and an outlet 120.
  • the tube comprises in its interior an inlet section 130 which narrows continuously downwards, an outlet section 140 which widens continuously downwards and an outlet section 140 arranged between these two sections transition section 150 with a substantially constant flow cross section.
  • the transition section 150 is designed to be somewhat longer axially than in the first exemplary embodiment of the pipe interrupter.
  • the pipe 100 comprises, here for example three, aeration lines 260 which run helically in the pipe wall in the region of the transition section 150 .
  • Each of the three ventilation lines 260 has an inner orifice 261 and an outer orifice 262 .
  • the inner orifice openings 261 open radially inwardly into the transition section 150.
  • the outer orifice openings 262 open out radially outwardly into the area surrounding the tube 100.
  • the outer orifice openings 262 are located axially above the inner orifice openings 261, so that the ventilation lines 260 flow from the inside outwards upstream, i.e. against the direction of flow of the flushing water in the pipe 100 towards the inlet 110 of the pipe 100.
  • the ventilation lines 260 with their inner and outer openings 261, 262 are arranged at a distance from one another in the circumferential direction of the pipe 100.
  • curved guide surfaces 170 Arranged in the region of the inner openings 261 of the ventilation lines 260 are curved guide surfaces 170 which cover the inner openings 261 and prevent flushing water from penetrating directly into the ventilation lines 260 .
  • the ventilation lines 260 connect the interior of the pipe 100 to the surrounding exterior of the pipe 100 and serve to supply air in the event that a negative pressure occurs in the line system in which the pipe interrupter R is arranged in practical use. Air can enter the pipe 100 through the aeration lines 260, as a result of which potentially contaminated flushing water is prevented from being sucked back into the drinking water supply network.
  • the tube 100 In its interior, the tube 100 has an inlet section 130 that continuously narrows away from the inlet 110 and an elongated outlet section 140 that continuously widens on the inside in the direction of the outlet 120 .
  • a transition section 150 which forms the narrowest point in the pipe 100 , is arranged between the inlet section 130 and the outlet section 140 .
  • the transition section 150 has an essentially constant flow cross section.
  • the pipe interrupter R has four ventilation lines 160, two of which in the sectional drawing of Fig.10 you can see.
  • the ventilation ducts are formed in the wall of the pipe 100 and, in their lower part, project laterally beyond the periphery of the substantially cylindrical shape of the pipe interrupter.
  • the ventilation lines 160 each have an inner opening 161 and an outer opening 162 .
  • the outer orifices 162 are located downstream, ie closer to the outlet 120 than the inner orifices 161.
  • the aeration lines 160 are straight and initially run downwards in the wall of the tube 100 and laterally outwards.
  • the inner outlet openings 161 open radially into the transition section 150.
  • the outer outlet openings open out below the transition section 150, directed downwards, into the outer space of the tube 100.
  • the angling of the ventilation lines 160 from the longitudinal axis includes, for example, an angle of approximately 5 degrees to 30 degrees , preferably between 5 degrees and 15 degrees.
  • the ventilation lines 160 with their inner and outer openings 161 and 162 are arranged at a distance from one another in the circumferential direction of the pipe 100 .
  • the four ventilation lines 160 connect the interior of the pipe 100 with the surrounding exterior of the pipe 100.
  • inwardly curved guide surfaces 170 are arranged in the transition section 150 in front of the inner orifice openings 161 . These cover the inner openings 161 and guide the flushing water flowing through locally, ie in the Area of the inner orifice openings 161 away from the inner wall of the transition section 150 .
  • the baffles 170 are in turn optimized in terms of arrangement, shape and size so that they effectively keep the flushing water flowing through away from the inner outlet openings 161, but at the same time represent only a minimal disruption point for the actual ventilation.
  • the individual guide surfaces are arranged at a distance from one another on the inside of the tube, preferably completely in the transition area.
  • the ventilation lines 160 running downwards and outwards with the outer openings 162 pointing downwards simultaneously form individual protective screens 181 with their lower ends, which prevent dirt from penetrating into the ventilation lines from the outside.
  • the pipe interrupter In normal operation, the pipe interrupter according to the invention conducts flushing water with minimal losses from the drinking water line to a connected sink, for example a toilet bowl, or other consumer.
  • the pipe interrupter creates a maximum pressure drop for flush water trying to flow through the vent lines from the inside to the outside, while ensuring a sufficiently low resistance to the flow of air from the outside to the inside.
  • the pipe interrupter according to the invention can be equipped with only a single aeration line or with several, in particular three or four, aeration lines.
  • the pipe interrupter according to the invention is not only used in toilet flushing systems, but also, for example, in shower installations or devices which, for example, are connected to a Drinking water line can be connected, can be used. The scope of protection is therefore defined by the following claims.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sink And Installation For Waste Water (AREA)
EP21157024.7A 2021-02-15 2021-02-15 Interrupteur de conduite et système de rinçage en étant équipé Pending EP4043652A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21157024.7A EP4043652A1 (fr) 2021-02-15 2021-02-15 Interrupteur de conduite et système de rinçage en étant équipé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21157024.7A EP4043652A1 (fr) 2021-02-15 2021-02-15 Interrupteur de conduite et système de rinçage en étant équipé

Publications (1)

Publication Number Publication Date
EP4043652A1 true EP4043652A1 (fr) 2022-08-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21157024.7A Pending EP4043652A1 (fr) 2021-02-15 2021-02-15 Interrupteur de conduite et système de rinçage en étant équipé

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EP (1) EP4043652A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151200A (en) * 1934-11-26 1939-03-21 Goodrie Cylent Flush Valve Co Fixed vacuum breaker for flush valves
US3455324A (en) * 1965-04-14 1969-07-15 Susten Anstalt Apparatus for preventing return-flow of liquid from a receptacle supplied under pressure by a supply network back into the latter
FR2457934A1 (fr) * 1979-05-29 1980-12-26 Piet Etablissements P Dispositif de disconnection a pression atmospherique pour appareil de distribution d'eau
DE29615925U1 (de) * 1996-09-13 1996-10-24 Stiebel Eltron Gmbh & Co Kg, 37603 Holzminden Warmwasserbereiter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2151200A (en) * 1934-11-26 1939-03-21 Goodrie Cylent Flush Valve Co Fixed vacuum breaker for flush valves
US3455324A (en) * 1965-04-14 1969-07-15 Susten Anstalt Apparatus for preventing return-flow of liquid from a receptacle supplied under pressure by a supply network back into the latter
FR2457934A1 (fr) * 1979-05-29 1980-12-26 Piet Etablissements P Dispositif de disconnection a pression atmospherique pour appareil de distribution d'eau
DE29615925U1 (de) * 1996-09-13 1996-10-24 Stiebel Eltron Gmbh & Co Kg, 37603 Holzminden Warmwasserbereiter

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