EP1444406A1 - Element sanitaire a incorporer - Google Patents

Element sanitaire a incorporer

Info

Publication number
EP1444406A1
EP1444406A1 EP02803031A EP02803031A EP1444406A1 EP 1444406 A1 EP1444406 A1 EP 1444406A1 EP 02803031 A EP02803031 A EP 02803031A EP 02803031 A EP02803031 A EP 02803031A EP 1444406 A1 EP1444406 A1 EP 1444406A1
Authority
EP
European Patent Office
Prior art keywords
outer housing
backflow preventer
closure piece
sealing lip
lip
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.)
Withdrawn
Application number
EP02803031A
Other languages
German (de)
English (en)
Inventor
Martin Fangmeier
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.)
Neoperl GmbH
Original Assignee
Neoperl GmbH
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 Neoperl GmbH filed Critical Neoperl GmbH
Publication of EP1444406A1 publication Critical patent/EP1444406A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/06—Check valves with guided rigid valve members with guided stems
    • F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K25/00—Details relating to contact between valve members and seats
    • 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]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7922—Spring biased
    • Y10T137/7929—Spring coaxial with valve

Definitions

  • the invention relates to a sanitary installation part with an outer housing, which can be inserted into a fluid line and carries at least one circumferential seal on its housing outer circumference, which seals between the outer housing and the fluid line.
  • a backflow preventer which has a closure piece which is guided in the outer housing of this backflow preventer against the flow direction against a valve seat.
  • an O-ring made of elastic material is inserted in a groove on the closure piece.
  • the outer housing of the known backflow preventer carries a further O-ring made of elastic material, which is to seal between the outer housing and the adjacent fluid line.
  • non-return valves are used in sanitary water pipes, special approvals are required which certify that these components have a food-safe quality, for example. Since many elastomers contain a high proportion of plasticizers per se, there is only a limited selection of elastomers available for producing the O-ring used in the known backflow preventer. In addition, the manufacture of such non-return valves also requires by using several components made of different materials, additional effort.
  • the built-in part according to the invention has an outer housing that can be inserted into a fluid line, on the housing outer periphery of which at least one circumferential seal is integrally formed, which is used for linear and / or flat sealing between the outer housing and the fluid line.
  • This seal makes an additional O-Rmg made of elastic material unnecessary. By saving such an O-ring, the outlay associated with the production and, if appropriate, also the approval of such an installation part can be considerably reduced, in particular if the seal is also made from the material also used for the outer housing.
  • At least one seal is designed as a lip seal. Additionally or instead, it can be advantageous if at least one seal is designed as a sealing ring molded onto the outer housing. In order to achieve a resilient seal between the outer housing and the fluid line even at high fluid pressures, it is advantageous if several lip seals and / or sealing rings are integrally formed on the outer housing, which can be arranged at a sufficient distance from one another in the intended flow direction.
  • seal (s) are provided in the upstream end region or in a central region of the outer housing.
  • the outer housing has a barrel-shaped or bulbous outer contour in at least one partial area. It can be advantageous if the largest outer circumference of the bulbous outer housing is arranged approximately in the center, based on the longitudinal extent of the housing, and / or if at least one sealing ring, preferably at least two sealing rings, is provided in the region of the largest outer periphery of the bulbous outer housing.
  • a further solution according to the invention of the task mentioned at the outset, of its own protection worthy of protection, which relates to a built-in part designed as a sanitary backflow preventer, provides that at least one circumferential sealing lip is integrally formed on the inner casing surface of the outer casing or on the closure piece, which protrudes with its free lip end in this way that in the closed position of the non-return valve, the lip end of the closure piece or sealingly applied to the inner casing surface of the outer casing.
  • This backflow preventer according to the invention whose outer housing and closure piece are made as plastic injection molded parts from a thermoplastic or similar engineering plastic, has at least one sealing lip which is integrally formed on the inner casing surface of the outer housing or on the closure piece. Since this at least one sealing lip is designed as an integral part of the outer housing or the closure piece, it can also be produced from the same material. Such a sealing lip, which in the closed position of the backflow preventer sealingly acts on the closure piece or the inner casing surface, also makes an additional O-ring made of elastic material unnecessary. By saving this O-ring, the effort associated with the manufacture and, if appropriate, also the approval of such a backflow preventer can be considerably reduced.
  • a sleeve-shaped housing section with a central throughflow opening is provided in the outer housing, the sleeve-shaped housing section at least in its sleeve end protruding into the housing interior and forming the valve seat. rich has a frusto-conical outer circumference and when the lip end of the at least one sealing lip formed on the closure piece seals the frustoconical outer circumference of the sleeve-shaped housing section in the closed position of the non-return valve.
  • the sealing lip is slightly spread apart and does not compress in the outer circumference when it runs onto the frustoconical outer circumference of the sleeve-shaped housing section, which could otherwise lead to fold formation in the region of the sealing lip and thus to undesired leaks.
  • the free lip end region is applied linearly to the at least one sealing lip around the closure piece or the inner lateral surface of the outer housing in the closed position of the check valve.
  • an embodiment according to the invention provides that the at least one sealing lip tapers conically in cross section in its free lip end region.
  • a particularly good seal of the valve seat can be achieved if the at least one sealing lip is oriented approximately parallel to the longitudinal axis of the backflow preventer in its longitudinal extent. It is particularly advantageous if the portion of the closure piece acted upon by the sealing lip is designed as an inclined surface oriented in the flow direction from the inside to the outside. In particular through the combination of these features, the at least one sealing lip lies diagonally to the lateral surface of the closure piece, close to the latter.
  • the Backflow preventer has at least one effective stop in the closed position for the closure piece.
  • annular circumferential portion of the inner casing surface of the outer casing is provided as a stop.
  • the sleeve end region of the sleeve-shaped housing section in the outer housing of the non-return valve, which forms a valve seat, can serve as a stop.
  • an additional seal can be achieved if the inner casing outer surface of the outer casing, which serves as a stop and serves as a stop, is complementary to the part area of the closure piece opposite in the closed position.
  • a preferred embodiment according to the invention provides that the at least one sealing lip and the at least one stop are arranged in such a way that the sealing lip acts on the closure piece before the stop becomes effective.
  • the at least one sealing lip is designed to be flexible at least in its free lip end region.
  • the closing and resetting movements of this sealing lip which is flexible at least in one area, counteracts calcification of the non-return valve at least in this area.
  • sealing lip In order to achieve a self-reinforcing sealing effect of the sealing lip, it can be advantageous if at least one sealing lip is acted upon by the reverse flow and can be pressed against the closure piece.
  • a high fatigue strength of the backflow preventer can be favored if the outer housing is made of a plastic, preferably a construction plastic.
  • a preferred embodiment according to the invention provides that the outer housing is made from a thermoplastic.
  • Fig. 1 shows a backflow preventer, which has a circumferential sealing lip on the inner casing surface of the outer housing, which sealingly acts on the closure piece in the closed position of the backflow preventer
  • Fig. 2 shows a backflow preventer, also shown in a longitudinal section, which here has a circumferential sealing lip on the front face of its closure piece, which cooperates with the frustoconical sleeve end region of a sleeve-shaped and valve seat-forming housing section of the outer housing.
  • FIG. 1 two different versions 1, 10 of a check valve are shown in a longitudinal section. While the embodiment shown in the left half of FIG. 1 documents the state of the art in terms of its internal structure, an embodiment of the non-return valve 10 according to the invention is shown in the right half of FIG.
  • the backflow preventer 1, 10 shown in Fig. 1 are intended for insertion in a sanitary water pipe. They have a valve 2, which is arranged in a sleeve-shaped outer housing 3.
  • the valve 2 of the backflow preventer 1, 10 has a closure piece 4, which is displaceably guided against a valve seat 6 in the outer housing 3 by the restoring force of a compression spring 5 against the flow direction Pf1.
  • the valve seat 6 is formed by a partial area of the inner casing surface of the outer casing 3.
  • the known backflow preventer 1 has an O-ring made of elastic material, which is inserted into a groove 18 on the closure piece 4. Since many elastomers are not suitable for drinking water due to the high proportion of plasticizers, there is at most only a limited selection of elastomers available for the production of such O-rings in various areas of application. Since the elastic material rial of O-Rmge 7 tends to stick to the valve seat 6, especially after a corresponding contact pressure, the previously known backflow preventer 1 does not have a uniform response when opening and closing. In addition, the known backflow preventer 1 are subject to increased wear in the area of the O-ring 7.
  • the backflow preventer 10 therefore has an encircling sealing lip 8 instead of an O-ring 7, which is integrally formed in the area of the valve seat 6 on the inner casing surface of the outer casing 3.
  • This sealing lip 8 projects with its free lip end 9 into the interior of the housing in such a way that it acts sealingly on the closure piece 4 in the closed position of the non-return valve 10.
  • the sealing lip 8 is formed here as a pointed lip and tapers conically in cross section at its free lip end region. This tapering configuration of the sealing lip 8 ensures that the sealing lip 8 of the closure piece, in the closed position of the non-return valve 10, acts linearly around its free lip end region.
  • the sealing lip 8 which is oriented approximately axially parallel to the longitudinal axis 11 of the non-return valve 10, acts on the closure piece 4 in a partial region 12, which is designed as an inclined surface arranged in the flow direction Pf1 from the inside to the outside.
  • the backflow preventer 10 has a stop 13, which is formed here by an annular peripheral region of the inner casing surface of the outer casing 3.
  • the portion of the casing surface serving as a stop 13 is complementary to the portion of the closure piece 4 opposite in the closed position. Since the stop 13 acts on the inclined surface 12 of the closure piece 4 in the closed position of the check valve 10, an additional seal can be achieved in this area of the check valve 10.
  • the sealing lip 8 is arranged in the flow direction Pf1 in front of the stop 13 such that the sealing lip 8 acts on the closure piece 4 before the stop 13 becomes effective.
  • the sealing lip 8 is designed to be flexible only in its free lip end region. The closing and restoring movements of the resilient part of the sealing lip 8 effectively counteracts calcification of the non-return valve 10 in this area.
  • the sealing lip 8 protrudes freely into the interior of the housing in such a way that it is acted upon by a reverse flow and pressed against the closure piece 4.
  • the valve 2 of the backflow preventer 10 thus has a self-reinforcing sealing function.
  • sealing lip 8 of the backflow preventer 10 is formed as an integral part of the outer housing 3, it can also be produced from the same material.
  • the outer housing 3 with the sealing lip 8 formed thereon and the closure piece 4 are made of the same material.
  • the components 3, 4 of the backflow preventer 10 are made from a technical thermoplastic or similar construction plastic, generally referred to here as a thermoplastic.
  • the embodiments shown here provide that at least the outside of the backflow preventer is also on the outside a seal is made of the same material and is formed in one piece.
  • the backflow preventer 10 according to the invention can be produced with little effort from only a few components, preferably of the same material, for example the outer housing and the closure piece can be produced in the simplest way as plastic injection molded parts.
  • FIG. 2 shows another embodiment of the backflow preventer 10 according to the invention.
  • the backflow preventer shown in Fig. 2 has on the inflow-side end of its closure piece 4 a circumferential and in longitudinal Direction of the backflow preventer 10 protruding sealing lip 8.
  • the sealing lip 8 lies linearly and closely against the inner casing surface of the outer casing 3.
  • a sleeve-shaped housing section 14 is provided in the outer housing 3, which has a truncated cone-shaped outer circumference in its sleeve end region projecting into the housing interior and forming the valve seat.
  • the sealing lip 8 runs onto the truncated cone-shaped housing section 14 during the closing movement of the backflow preventer 10, the sealing lip 8, which is flexible at least in its free lip end region, is slightly expanded and not compressed on the outer circumference, which otherwise leads to wrinkling in the region of the sealing lip 8 and thus to undesirable leaks could result.
  • the sealing lip 8 of the backflow preventer 10 shown in FIG. 2 is also oriented approximately axially parallel to the longitudinal axis of the backflow preventer 10 in its longitudinal extent and tapers to the cross section in a conical shape in its free lip end region.
  • the front end of the frustoconical housing section 14 forming the valve seat acts as a stop for the closure piece 4 which is effective in the closed position.
  • the front end of the housing section 14 cooperates with a ring shoulder 15 oriented approximately at right angles to the longitudinal axis of the backflow preventer 10, which is provided on the outer edge of the inflow-side front end of the closure piece 4 and carries the sealing lip 8.
  • the sealing lip 8 and the end of the housing section 14 acting as a stop for the closure piece 4 are arranged such that the sealing lip 8 Closure piece 4 is applied before the front end of the housing section 14 abuts the ring shoulder 15 of the closure piece 4.
  • the backflow preventer 10 shown in FIG. 2 otherwise corresponds to the embodiment shown in FIG. 1. Even in the case of the non-return valve shown in FIG. 2, an O-ring made of elastic material can be dispensed with in the region of the valve seat, which considerably reduces the effort associated with the production and also the approval of such a non-return valve.
  • the sanitary installation parts 1, 10 shown here can also be sealed in the area lying between their outer housing 3 and the fluid line without an additional separate O-ring made of elastic material.
  • the sanitary built-in parts 1, 10, which are designed here as a backflow preventer, have circumferential seals 20, 21, which are integrally formed on the outer circumference of the housing. These seals 20, 21, which are designed as molded parts of the outer housing 3, are made of the same material as the outer housing 3.
  • the seals 20, 21 of the backflow preventer are arranged at a slight distance from one another in the inflow direction Pf1 and are each provided here for a linear seal between the outer housing 3 and the fluid line.
  • the seals of the non-return valve 10 are designed as lip seals 20 which are arranged in the upstream end area of the non-return valve. While the upstream end of the Back seal preventing upper sealing lip 20 is oriented obliquely against the inflow direction Pf1, the sealing lips 20 following in the inflow direction Pf1 are oriented approximately radially.
  • the backflow preventer 1 shown in FIG. 1 has a plurality of seals 21 in the central region of its longitudinal extent, which are integrally formed on the outer housing 3 as circumferential sealing rings 21.
  • the backflow preventer 1 has a bulbous outer contour in this central region, the largest outer diameter of which is preferably approximately equal to or larger than the inner diameter of the liquid line in the line section intended for receiving the backflow preventer.
  • the seals 20, 21 of the backflow preventer 1, 10 make an additional O-ring made of elastic material on the outer housing 3 unnecessary.
  • the effort associated with the production and, if appropriate, also the approval of such an installation part can be considerably reduced, in particular if the seals 20, 21 are also made from the material also used for the outer housing 3.
  • the molded seals 20, 21 can be provided on the outer housing and / or the seals described here on the valve 2.
  • the seals 20, 21 molded onto the outer housing 3 are concerned, they can not only be fitted to a non-return valve, but also be provided on a flow rate regulator, a jet regulator or another sanitary installation part which can be inserted with its outer housing 3 into a sanitary water or fluid line.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Check Valves (AREA)

Abstract

Elément sanitaire à incorporer (1, 10) comportant un boîtier externe (3) qui peut être installé dans une conduite de fluide et qui comporte sur sa périphérie externe au moins un joint d'étanchéité (20, 21) périphérique assurant l'étanchéité entre le boîtier externe (3) et la conduite de fluide. Selon la présente invention, pour pouvoir éviter le recours à des joints toriques supplémentaires en matière élastique, le joint d'étanchéité (20, 21) prévu pour assurer une étanchéité linéaire et / ou en forme de plan est fabriqué dans la même matière que le boîtier externe et formé d'un seul tenant avec la périphérie externe du boîtier et sur cette dernière. Selon un autre mode de réalisation de la présente invention concernant un élément à incorporer conçu en tant qu'inhibiteur de reflux, au moins une lèvre d'étanchéité (8) périphérique est formée d'un seul tenant avec la paroi interne du boîtier externe (3) ou l'élément de fermeture (4) et sur ladite paroi ou ledit élément, et constituée de la même matière que ladite paroi ou ledit élément. Cette lèvre d'étanchéité (8) fait saillie au niveau de son extrémité libre de manière telle que lorsque l'inhibiteur de reflux (10) est fermé, l'extrémité de la lèvre exerce une action d'étanchéité sur l'élément de fermeture (4) ou sur la paroi interne du boîtier externe (3).
EP02803031A 2001-11-17 2002-11-15 Element sanitaire a incorporer Withdrawn EP1444406A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20118810U DE20118810U1 (de) 2001-11-17 2001-11-17 Rückflußverhinderer
DE20118810U 2001-11-17
PCT/EP2002/012827 WO2003042461A1 (fr) 2001-11-17 2002-11-15 Element sanitaire a incorporer

Publications (1)

Publication Number Publication Date
EP1444406A1 true EP1444406A1 (fr) 2004-08-11

Family

ID=7964167

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02803031A Withdrawn EP1444406A1 (fr) 2001-11-17 2002-11-15 Element sanitaire a incorporer

Country Status (4)

Country Link
US (2) US20040261861A1 (fr)
EP (1) EP1444406A1 (fr)
DE (1) DE20118810U1 (fr)
WO (1) WO2003042461A1 (fr)

Families Citing this family (11)

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Publication number Priority date Publication date Assignee Title
US20070193633A1 (en) * 2006-02-17 2007-08-23 Conbraco Industries, Inc. Self-contained check valve module
DE102010062173A1 (de) * 2010-11-30 2012-05-31 Robert Bosch Gmbh Ventil, insbesondere Auslassventil einer hydraulischen Kolbenpumpe
DE102011120628A1 (de) * 2011-12-09 2013-06-13 Illinois Tool Works Inc. Rückschlagventil
JP6280704B2 (ja) * 2013-07-23 2018-02-14 Ｋｙｂ株式会社 制御バルブ
CN104832655B (zh) * 2014-02-12 2019-06-11 浙江盾安禾田金属有限公司 一种空调用截止阀
FR3074554B1 (fr) * 2017-12-05 2020-08-14 Safran Aircraft Engines Clapet de circuit hydraulique a perte de charge constante
DE102018111811A1 (de) * 2018-05-16 2019-11-21 Otto Egelhof Gmbh & Co. Kg Rückschlagventil, insbesondere für einen Kälte- oder Wärmekreislauf
EP3633111A1 (fr) * 2018-10-02 2020-04-08 Vonroll Infratec (Investment) AG Clapet antiretour, raccord pour tuyau flexible pour une bouche d'eau et bouche d'eau
DE102019120227A1 (de) * 2019-07-26 2020-08-06 Schaeffler Technologies AG & Co. KG Ventil und Vorrichtung zur Regelung von Drücken eines Strömungsmittels mit dem Ventil sowie Vorrichtung zur Sicherung des Ventils in dem Getriebebauteil
DE102021118227A1 (de) 2021-07-14 2023-01-19 Neoperl Gmbh Rückflussverhinderer
IT202200002909A1 (it) * 2022-02-16 2023-08-16 Rubinetterie Ritmonio S R L Valvola di sicurezza per riscaldatori d’acqua, in particolare valvola contro sovra-pressioni per scaldabagni

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Also Published As

Publication number Publication date
WO2003042461A1 (fr) 2003-05-22
DE20118810U1 (de) 2003-04-03
US20040261861A1 (en) 2004-12-30
US20060102235A1 (en) 2006-05-18

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