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EP0183909A2 - Tube disconnector, especially for drinking-water conduit pipes - Google Patents

Tube disconnector, especially for drinking-water conduit pipes Download PDF

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Publication number
EP0183909A2
EP0183909A2 EP85109013A EP85109013A EP0183909A2 EP 0183909 A2 EP0183909 A2 EP 0183909A2 EP 85109013 A EP85109013 A EP 85109013A EP 85109013 A EP85109013 A EP 85109013A EP 0183909 A2 EP0183909 A2 EP 0183909A2
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
tube
inlet
outlet
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
Application number
EP85109013A
Other languages
German (de)
French (fr)
Other versions
EP0183909A3 (en
EP0183909B1 (en
Inventor
Heinrich W. Kiesewetter
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.)
Ecolab Engineering GmbH
Original Assignee
Lang Apparatebau 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 Lang Apparatebau GmbH filed Critical Lang Apparatebau GmbH
Priority to AT85109013T priority Critical patent/ATE37058T1/en
Publication of EP0183909A2 publication Critical patent/EP0183909A2/en
Publication of EP0183909A3 publication Critical patent/EP0183909A3/en
Application granted granted Critical
Publication of EP0183909B1 publication Critical patent/EP0183909B1/en
Expired legal-status Critical Current

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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
    • E03C1/102—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
    • E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
    • 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 invention relates to a pipe separator to be installed, in particular, in drinking water pipes, with an inlet cylinder located one behind the other in the flow direction, a leakage-separating separation point and outlet cylinder, and with a piston separating pipe, which is axially displaceable in the inlet cylinder and has a piston flange that can be acted upon on the inlet water side Contrary to the action of a return spring, the pressure of the inlet water must be shifted to a flow position bridging the separation point, in which the inlet valve and a non-return valve on the outlet side open.
  • Pipe separators of the above type are known, for example from the D E-GM 82 07 222. They are used wherever there is a risk that water enriched or otherwise contaminated with harmful substances can get back into the feed water supply line network by sucking back or pushing back. Sucking back is understood to mean a backflow due to a drop in the supply pressure without an increase in pressure on the outlet side, and a backflow due to an increase in pressure on the outlet or outlet side with the supply pressure remaining essentially constant.
  • the known pipe separators In order to be able to prevent both of the above-mentioned reflux possibilities, the known pipe separators must in any case be provided with an upstream shut-off valve, which must also be controlled as a function of the liquid pressure occurring in the outflow or process water side, for which purpose the known pipe separators are quite complex hydraulic or electromagnetic control is necessary.
  • the invention is therefore based on the object of improving and perfecting a pipe separator of the type in question in such a way that it effectively protects the drinking water supply line against backflow of the process water caused by suction or backpressures, but without the cumbersome hydraulic or electromagnetic control of an upstream shut-off valve is sufficient.
  • This object is achieved in that the piston separating tube has at its outlet end a further piston flange to be acted on on the outlet water side, is to be closed by the check valve and has a radial breakthrough between its two piston flanges, which in the flow position of the piston separating tube to be closed on the cylinder housing side, but in the disconnected position is to be connected to the separating point of the cylinder housing.
  • the check valve advantageously consists of a valve body which is slidably seated on a valve rod attached to the outlet-side end of the piston separating tube and which is to be pressed by a compression spring against the outlet-side end of the piston separating tube forming the valve seat.
  • the check valve which is present anyway in such a pipe separator and serves as a backflow preventer, is simultaneously used to correspondingly enlarge the discharge-side loading area of the piston separating pipe, namely in that this non-return valve closes the piston separating pipe on the rear side when the back pressure occurs and thus additionally in accordance with its effective loading area on the Displacement of the piston separation tube in its separation position contributes to the pressure rise occurring on the outlet side.
  • the piston flanges at both ends of the piston separating tube can be provided with ring seals which bear against the inner wall of the cylinder housing. However, they can also be equipped with flexible membranes which are clamped on the circumference of the cylinder housing.
  • the pipe separator shown in FIG. 1 is provided in a known manner with an inlet cylinder 2 having an inlet connection 1, a drainage point 3 draining off water, an outlet cylinder 5 having an outlet connection 4 and a piston separating pipe 6 which is axially displaceably guided in the inlet cylinder 2 and which has a piston flange 7 on the inlet side with an annular seal 7 'and can be moved under the pressure of the inlet water against the action of the return spring 8 in the flow position shown in Fig. 1.
  • the inlet cylinder 2 and the outlet cylinder 5 are combined via screw connection flanges 2 ', 5' to form a common cylinder housing, which has a constriction 9 reaching towards the piston separating tube 6 behind the separating point 3 and the window 2 '' opposite the latter.
  • a constriction 9 reaching towards the piston separating tube 6 behind the separating point 3 and the window 2 '' opposite the latter.
  • two ring seals 10 which, in the flow position of the piston separating tube 6 shown, bear against the latter on both sides of its radial opening 6 '.
  • In the constriction 9 there are also longitudinal axially extending ventilation channels 11 for the chamber 5 ′′, which are sealed by the ring seals 13 present in the connection separating surface 12.
  • inlet valve 14 which consists of the valve rod 15, which is fastened in a spoke-like manner in the inlet connection 1, and the valve body 16, which is sealed and slidably mounted thereon, the sealing end face 16 'of which cooperates with the valve seat surface 6 "present on the inlet-side end of the piston separating pipe 6 Sliding seal rings in the valve body 16 are denoted by 16 ".
  • the valve rod 15 is provided with a hollow channel 15 'which can be connected to the inlet pressure chamber 17 through the transverse bore 15" and which at the other end comes out of the valve rod 15 at the end
  • a hollow channel 15 ' which can be connected to the inlet pressure chamber 17 through the transverse bore 15" and which at the other end comes out of the valve rod 15 at the end
  • the return spring 8 is supported on the one hand on the piston flange 7 and on the other hand on the constriction 9.
  • the piston separating tube 6 is provided with a radial opening 6 ', specifically in the form of a plurality of windows located between the connecting ribs 6'''.
  • the piston separating tube 6 is provided with a further piston flange 18, which is guided on its circumference with a ring seal 18 ′ present here on the inner wall of the outlet cylinder 5 in a sealingly sliding manner. This piston flange 18 is acted upon by the water pressure prevailing in the outlet chamber 19.
  • the piston separating tube 6 is here provided with a valve rod 20, which in turn is attached to it in a spoke-like manner, and a valve body 21 which is slidably mounted thereon and which acts under the action of the compression spring 22 arranged around the valve rod 20, which presses the valve body 21 against its valve seat surface 6 IV , which is present at the end of the piston separating tube tries to press.
  • the valve body 21, like the valve body 16, is provided with seals 21 ′′, via which it is sealingly guided on the valve rod 20.
  • the valve parts 20 to 22 described above form the check valve located on the outlet side.
  • the piston flange 7 In the flow position of the pipe separator shown in FIG. 1, the piston flange 7 is held in its stop position on the inner flange 2 ′′ ′′ and thus the piston separating pipe 6 in its flow position shifted to the far right by the water pressure prevailing in the inlet chamber 14.
  • the drinking water flowing in via the inlet connection 1 flows past the inlet valve body 16, which in its illustrated stop position is held on the limit stop 15 '''seated on the valve rod 15'.
  • the tap water flows through the axial bore 6 V of the piston separating tube 6.
  • the inlet water flows exclusively through the piston separating pipe 6, at the end of which the check valve body 21, depending on the flow rate or flow rate, acts against the action of the Compression spring 22 pushes into the open position and thus finally over the drain chambers 19 get into the drain port 4.
  • the check valve body 21 is against the valve seat surface 6 IV on the piston separating tube 6 pressed, which is thereby blocked for the water return.
  • the piston separating tube 6 is shifted to the left into its separating position, in which the radial openings 6 'come to lie at the level of the separating point 3 or the viewing window 2''and thus the desired separating position between the inlet and outlet side is reached.
  • the piston separating tube 6 hits the inlet valve body 16 with its front valve seat surface 6 ′′ and shifts it accordingly to the left.
  • the water present in the inlet-side chamber 17 can escape via the hollow channel 15 'in the direction of the separation point 3, at least until the valve body 16 has covered the transverse bore 15''in the valve rod 15.
  • the pipe separator is in the disconnected position.
  • the pipe separator shown in Fig. 2 is of basically the same nature as that shown in Fig. 1.
  • the matching parts are provided with the same reference numerals.
  • the difference here is that the pipe separator housing consists of a stepped, essentially cylindrical middle part 23 and two funnel-shaped housing end parts 24, 25 arranged at both ends thereof. Between these end parts and the central part 23, a piston membrane 26 or 27 is clamped on its circumference.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Check Valves (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

1. Tubular isolator, particularly for drinking water pipes, comprising an inlet cylinder (2), drainage connection point and outlet cylinder (5), arranged one after the other in the through-flow direction, and also comprising an isolating plunger (6) which is guided for axial displacement in the inlet cylinder (2), which has a pressure-responsive piston flange (7) at the water-inlet end thereof, which is closable by an inlet valve (14) at its inlet end in its isolating setting, and which is displaceable into a through-flow setting bridging the drainage connection point under the pressure of the supply water overcoming the action of a restoring spring (8), wherein the inlet valve (14) and also a check valve (21) provided at the outlet end of the plunger are open in the through-flow setting of the plunger, characterised in that the isolating plunger (6) is provided at its outlet-side end with a further piston flange (18) responsive to pressure at the outlet side thereof, the plunger can be closed by the check valve (21), and between its two piston flanges (7, 18) the plunger has a radial opening (6') which in the through-flow setting of the isolating plunger (6) is closed off circumferentially, but which in the isolating setting is connected to the drainage connection point of the cylinder housing (2).

Description

Die Erfindung bezieht sich auf einen insbesondere in Trinkwasserleitungen einzubauenden Rohrtrenner mit in Durchströmungsrichtung jeweils hintereinanderliegendem Zulaufzylinder, leckwasserableitender Trennstelle und Ablaufzylinder sowie mit einem im Zulaufzylinder axial verschieblich geführten, einen zulaufwasserseitig beaufschlagbaren Kolbenflansch aufweisenden Kolbentrennrohr, das in seiner Trennstellung zulaufseitig durch ein Zulaufventil verschließbar und unter dem Druck des Zulaufwassers entgegen der Wirkung einer Rückstellfeder in eine die Trennstelle überbrückende Durchflustellung zu verschieben ist, in der das Zulaufventil wie auch ein ablaufseitig vorhandenes Rückschlagventil öffnen.The invention relates to a pipe separator to be installed, in particular, in drinking water pipes, with an inlet cylinder located one behind the other in the flow direction, a leakage-separating separation point and outlet cylinder, and with a piston separating pipe, which is axially displaceable in the inlet cylinder and has a piston flange that can be acted upon on the inlet water side Contrary to the action of a return spring, the pressure of the inlet water must be shifted to a flow position bridging the separation point, in which the inlet valve and a non-return valve on the outlet side open.

Rohrtrenner obiger Art sind bekannt, z.B. durch das DE-GM 82 07 222. Sie werden überall dort eingesetzt, wo die Gefahr besteht, das mit gesundheitsschädlichen Stoffen angereichtertes oder sonstwie verunreinigtes Wasser durch Rücksaugen oder Rückdrücken in das Speisewasser-Versorgungsleitungsnetz gelangen kann. Dabei wird unter Rücksaugen ein Rückfluß durch Abfall des Versorgungsdruckes ohne ablaufseitige Druckerhöhung und unter Rückdrücken ein Rückfluß durch Druckerhöhung auf der Ab- bzw. Auslaufseite bei im wesentlichen konstant bleibendem Versorgungsdruck verstanden. Um beide der vorerwähnten Rückflußmöglichkeiten verhindern zu können, müssen die bekannten Rohrtrenner in jedem Falle mit einem vorgeschalteten Absperrventil versehen werden, das auch in Abhängigkeit von dem in der Ablauf- bzw. Brauchswasserseite auftretenden Flüssigkeitsdruck gesteuert werden muß, wozu bei den bekannten Rohrtrennern eine recht aufwendige hydraulische oder elektromagnetische Steuerung notwendig ist.Pipe separators of the above type are known, for example from the D E-GM 82 07 222. They are used wherever there is a risk that water enriched or otherwise contaminated with harmful substances can get back into the feed water supply line network by sucking back or pushing back. Sucking back is understood to mean a backflow due to a drop in the supply pressure without an increase in pressure on the outlet side, and a backflow due to an increase in pressure on the outlet or outlet side with the supply pressure remaining essentially constant. In order to be able to prevent both of the above-mentioned reflux possibilities, the known pipe separators must in any case be provided with an upstream shut-off valve, which must also be controlled as a function of the liquid pressure occurring in the outflow or process water side, for which purpose the known pipe separators are quite complex hydraulic or electromagnetic control is necessary.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Rohrtrenner der in Rede stehenden Gattung dahingehend zu verbessern und zu vervollkommnen, daß er die Trinkwasserzüleitung wirksam gegen durch Rücksog oder Rückdrücke bedingten Rückfluß des Brauchwassers schützt, dabei aber ohne die dazu bisher für notwendig gehaltene umständliche hydraulische oder elektromagnetische Steuerung eines vorgeschalteten Absperrventils auskommt. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Kolbentrennrohr an seinem ablaufseitigen Ende einen weiteren, ablaufwasserseitig zu beaufschlagenden Kolbenflansch aufweist, durch das Rückschlagventil zu verschließen ist und zwischen seinen beiden Kolbenflanschen einen radialen Durchbruch besitzt, der in der Durchflußstellung des Kolbentrennrohres zylindergehäuseseitig zu verschließen, dagegen in der Trennstellung mit der Trennstelle des Zylindergehäuses zu verbinden ist. Auf diese Weise kommt man zu einem Rohrtrenner, dessen unter Wirkung einer Rückstellfeder stehendes Kolbentrennrohr nicht nur vom Zulaufwasserdruck, sondern auch vom Ablaufwasserdruck beaufschlagbar ist und daher bei entsprechendem Druckanstieg in der Ablauf- bzw. Brauchwasserseite das Kolbentrennrohr entgegen seiner zulaufseitigen Wasserdruckbeaufschlagung mit Unterstützung der Rückstellfeder auch in seine Trennstellung zu verschieben vermag, in der die Ablaufseite von der Zulaufseite wirksam getrennt wird. Für die vorbeschriebene Funktion bedarf es grundsätzlich keines besonderen vorgeschalteten Absperrventils und jedenfalls auch keiner zusätzlichen hydraulischen oder elektromagnetischen Steuerung.The invention is therefore based on the object of improving and perfecting a pipe separator of the type in question in such a way that it effectively protects the drinking water supply line against backflow of the process water caused by suction or backpressures, but without the cumbersome hydraulic or electromagnetic control of an upstream shut-off valve is sufficient. This object is achieved in that the piston separating tube has at its outlet end a further piston flange to be acted on on the outlet water side, is to be closed by the check valve and has a radial breakthrough between its two piston flanges, which in the flow position of the piston separating tube to be closed on the cylinder housing side, but in the disconnected position is to be connected to the separating point of the cylinder housing. In this way, a pipe separator is obtained, the piston separating pipe of which acts under the action of a return spring and can be acted upon not only by the inlet water pressure, but also by the outlet water pressure, and therefore, with a corresponding increase in pressure in the outlet or process water side, the piston separating pipe, contrary to its inlet-side water pressure, with the support of the return spring is able to move into its disconnected position, in which the outlet side is effectively separated from the inlet side. For the function described above, there is generally no need for a special upstream shut-off valve and, in any case, no additional hydraulic or electromagnetic control.

Das Rückschlagventil besteht vorteilhaft aus einem auf einer am ablaufseitigen Ende des Kolbentrennrohres befestigten Ventilstange gleitverschieblich sitzenden Ventilkörper, der durch eine Druckfeder gegen das den Ventilsitz bildende ablaufseitige Ende des Kolbentrennrohres zu drücken ist. Hierdurch wird das bei einem solchen Rohrtrenner ohnehin vorhandene, als Rückflußverhinderer diendende Rückschlagventil zugleich dazu benutzt, um die ablaufseitige Beaufschlagungsfläche des Kolbentrennrohres entsprechend zu vergrößern, dadurch nämlich, daß dieses Rückschlagventil bei auftretendem Rückdruck das Kolbentrennrohr rückseitig verschließt und somit entsprechend seiner wirksamen Beaufschlagungsfläche zusätzlich an der Verschiebung des Kolbentrennrohres in seine Trennstellung durch den auftretenden ablaufseitigen Druckanstieg mitwirkt.The check valve advantageously consists of a valve body which is slidably seated on a valve rod attached to the outlet-side end of the piston separating tube and which is to be pressed by a compression spring against the outlet-side end of the piston separating tube forming the valve seat. As a result, the check valve, which is present anyway in such a pipe separator and serves as a backflow preventer, is simultaneously used to correspondingly enlarge the discharge-side loading area of the piston separating pipe, namely in that this non-return valve closes the piston separating pipe on the rear side when the back pressure occurs and thus additionally in accordance with its effective loading area on the Displacement of the piston separation tube in its separation position contributes to the pressure rise occurring on the outlet side.

Die beidendig am Kolbentrennrohr vorhandenen Kolbenflansche können mit an der Zylindergehäuseinnenwandung anliegenden Ringdichtungen versehen sein. Sie können aber auch mit flexiblen Membranen ausgerüstet sein, die an ihrem Umfang am Zylindergehäuse eingespannt sind.The piston flanges at both ends of the piston separating tube can be provided with ring seals which bear against the inner wall of the cylinder housing. However, they can also be equipped with flexible membranes which are clamped on the circumference of the cylinder housing.

Weitere Merkmale und Vorteile der Erfindung werden anhand zweier in der Zeichnung dargestellter Ausführungsbeispiele beschrieben. Dabei zeigt

  • Fig. 1 eine erste Ausführungsform des Rohrtrenners in axialem Längsschnitt, mit hälftig geschnittenem Kolbentrennrohr, und
  • Fig. 2 eine zweite Ausführungsform, ebenfalls in axialem Längsschnitt.
Further features and advantages of the invention are described with reference to two exemplary embodiments shown in the drawing. It shows
  • Fig. 1 shows a first embodiment of the pipe separator in axial longitudinal section, with a half-cut piston separation tube, and
  • Fig. 2 shows a second embodiment, also in axial longitudinal section.

Der in Fig. 1 abgebildete Rohrtrenner ist in bekannter Weise mit einem einen Zulaufstutzen 1 aufweisenden Zulaufzylinder 2, einer leckwasserableitenden Trennstelle 3, einem einen Ablaufstutzen 4 aufweisenden Ablaufzylinder 5 und einem im Zulaufzylinder 2 axial verschieblich geführten Kolbentrennrohr 6 versehen, das einen zulaufseitig gelegenen Kolbenflansch 7 mit einer Ringdichtung 7' aufweist und unter dem Druck des Zulaufwassers entgegen der Wirkung der Rückstellfeder 8 in die in Fig. 1 dargestellte Durchflußstellung verschoben werden kann.The pipe separator shown in FIG. 1 is provided in a known manner with an inlet cylinder 2 having an inlet connection 1, a drainage point 3 draining off water, an outlet cylinder 5 having an outlet connection 4 and a piston separating pipe 6 which is axially displaceably guided in the inlet cylinder 2 and which has a piston flange 7 on the inlet side with an annular seal 7 'and can be moved under the pressure of the inlet water against the action of the return spring 8 in the flow position shown in Fig. 1.

Der Zulaufzylinder 2 und der Ablaufzylinder 5 sind über Schraubverbindungsflansche 2', 5' zu einem gemeinsamen Zylindergehäuse vereinigt, das hinter der leckwasserableitenden Trennstelle 3 und dem letzterer gegenüberliegenden Sichtfenster 2'' eine zum Kolbentrennrohr 6 heranreichende Einschnürung 9 aufweist. In dieser befinden sich zwei Ringdichtungen 10, die in der dargestellten Durchflußstellung des Kolbentrennrohres 6 an letzterem beidseitig seines radialen Durchbruchs 6' anliegen. In der Einschnürung 9 liegen weiterhin längs axial verlaufende Belüftungskanäle 11 für die Kammer 5'', die durch die in der Verbindungstrennfläche 12 vorhandenen Ringdichtungen 13 abgedichtet sind.The inlet cylinder 2 and the outlet cylinder 5 are combined via screw connection flanges 2 ', 5' to form a common cylinder housing, which has a constriction 9 reaching towards the piston separating tube 6 behind the separating point 3 and the window 2 '' opposite the latter. In this be there are two ring seals 10 which, in the flow position of the piston separating tube 6 shown, bear against the latter on both sides of its radial opening 6 '. In the constriction 9 there are also longitudinal axially extending ventilation channels 11 for the chamber 5 ″, which are sealed by the ring seals 13 present in the connection separating surface 12.

Vor dem Kolbentrennrohr 6 befindet sich das Zulaufventil 14, das aus der im Zulaufstutzen 1 speichenartig befestigten Ventilstange 15 und dem darauf abgedichtet gleitverschieblich lagernden Ventilkörper 16 besteht, dessen abdichtende Stirnfläche 16' mit der am zulaufseitigen Ende des Kolbentrennrohres 6 vorhandenen Ventilsitzfläche 6" zusammenwirkt. Die Gleitdichtungsringe im Ventilkörper 16 sind mit 16'' bezeichnet. Die Ventilstange 15 ist mit einem Hohlkanal 15' versehen, der durch die Querbohrung 15'' mit der Zulauf-Beaufschlagungskammer 17 in Verbindung stehen kann und der an seinem anderen Ende stirnseitig aus der Ventilstange 15 frei ausmündet. Im Zulaufzylinder 2 ist noch ein Innenflansch 2''' vorhanden, an dem der Kolbenflansch 7 in der dargestellten Durchflußstellung des Kolbentrennrohres 6 anliegt. Die Rückstellfeder 8 stützt sich einerseits am Kolbenflansch 7 und andererseits an der Einschnürung 9 ab.In front of the piston separating pipe 6 there is the inlet valve 14, which consists of the valve rod 15, which is fastened in a spoke-like manner in the inlet connection 1, and the valve body 16, which is sealed and slidably mounted thereon, the sealing end face 16 'of which cooperates with the valve seat surface 6 "present on the inlet-side end of the piston separating pipe 6 Sliding seal rings in the valve body 16 are denoted by 16 ". The valve rod 15 is provided with a hollow channel 15 'which can be connected to the inlet pressure chamber 17 through the transverse bore 15" and which at the other end comes out of the valve rod 15 at the end In the feed cylinder 2 there is also an inner flange 2 ″ ″ against which the piston flange 7 rests in the flow position of the piston separating tube 6. The return spring 8 is supported on the one hand on the piston flange 7 and on the other hand on the constriction 9.

Das Kolbentrennrohr 6 ist, wie schon erwähnt, mit einem radialen Durchbruch 6' versehen, und zwar in Gestalt mehrerer zwischen den Verbindungsrippen 6''' gelegener Fenster. An seinem ablaufseitigen Ende ist das Kolbentrennrohr 6 mit einem weiteren Kolbenflansch 18 versehen, der an seinem Umfang mit einer hier vorhandenen Ringdichtung 18' an der Innenwandung des Ablaufzylinders 5 abdichtend gleitverschieblicht geführt ist. Dieser Kolbenflansch 18 wird von dem in der Ablaufkammer 19 herrschenden Wasserdruck beaufschlagt. Weiterhin ist das Kolbentrennrohr 6 hier mit einer wiederum speichenartig an ihm befestigten Ventilstange 20 und einem darauf gleitverschieblich gelagerten Ventilkörper 21 versehen, der unter Wirkung der um die Ventilstange 20 herum angeordneten Druckfeder 22 steht, die den Ventilkörper 21 gegen seine am Kolbentrennrohrende vorhandene Ventilsitzfläche 6IV zu drücken sucht. Der Ventilkörper 21 ist ebenso wie der Ventilkörper 16 mit Dichtungen 21'' versehen, über die er abdichtend auf der Ventilstange 20 geführt ist. Die vorbeschriebenen Ventilteile 20 bis 22 bilden das ablaufseitig gelegene Rückschlagventil.As already mentioned, the piston separating tube 6 is provided with a radial opening 6 ', specifically in the form of a plurality of windows located between the connecting ribs 6'''. At its outlet-side end, the piston separating tube 6 is provided with a further piston flange 18, which is guided on its circumference with a ring seal 18 ′ present here on the inner wall of the outlet cylinder 5 in a sealingly sliding manner. This piston flange 18 is acted upon by the water pressure prevailing in the outlet chamber 19. Furthermore, the piston separating tube 6 is here provided with a valve rod 20, which in turn is attached to it in a spoke-like manner, and a valve body 21 which is slidably mounted thereon and which acts under the action of the compression spring 22 arranged around the valve rod 20, which presses the valve body 21 against its valve seat surface 6 IV , which is present at the end of the piston separating tube tries to press. The valve body 21, like the valve body 16, is provided with seals 21 ″, via which it is sealingly guided on the valve rod 20. The valve parts 20 to 22 described above form the check valve located on the outlet side.

In der in Fig. 1 dargestellten Durchflußstellung des Rohrtrenners werden durch den in der Zulaufkammer 14 herrschenden Wasserdruck der Kolbenflansch 7 in seiner Anschlagstellung am Innenflansch 2''' und damit das Kolbentrennrohr 6 in seiner weitest nach rechts verschobenen Durchflußposition gehalten. Das über den Zulaufstutzen 1 zuströmende Trinkwasser fließt an dem Zulaufventilkörper 16 vorbei, der in seiner dargestellten Anschlagstellung an dem auf der Ventilstange 15' sitzenden Begrenzungsanschlag 15''' gehalten wird. Weiterhin fließt das Leitungswasser durch die Axialbohrung 6V des Kolbentrennrohres 6 hindurch. Da der Radialdurchbrüche 6' des Kolbentrennrohres durch die beidseitig davon vorhandenen Ringdichtungen 10 in der Gehäuse-Einschnürung 9 abgedichtet sind, fließt das Zulaufwasser ausschließlich durch das Kolbentrennrohr 6 hindurch, an dessen Ende es den Rückschlagventilkörper 21 je nach Strömungsgeschwindigkeit bzw. Durchlaufmenge gegen die Wirkung der Druckfeder 22 in Offenstellung schiebt und somit schließlich über die Ablaufkammern 19 in den Ablaufstutzen 4 gelangt. Sobald es aber wasserablaufseitig und damit auch in der Ablaufkammer 19 zu einem hinreichenden Druckanstieg kommt, sei es durch Unterbrechen der ablaufseitigen Wasserentnahme oder aus anderen Gründen, beispielsweise durch plötzlich auftretende Pumpenrückdrücke od. dgl., wird der Rückschlagventilkörper 21 gegen die Ventilsitzfläche 6IV am Kolbentrennrohr 6 gedrückt, das dadurch für den Wasserrücklauf gesperrt wird. Sodann wird durch die Beaufschlagung des Ventilkörpers 21 wie auch des Kolbenflansches 18 das Kolbentrennrohr 6 nach links in seine Trennstellung verschoben, in der die radialen Durchbrüche 6' in Höhe der Trennstelle 3 bzw. des Sichtfensters 2'' zu liegen kommen und somit die gewünschte Trennstellung zwischen Zu- und Ablaufseite erreicht wird. Bei der vorerwähnten Verschiebebewegung des Kolbentrennrohres 6 trifft letzteres mit seiner stirnseitigen Ventilsitzfläche 6'' auf den Zulaufventilkörper 16 und verschiebt diesen entsprechend nach links. Das in der zulaufseitigen Kammer 17 vorhandene Wasser kann über den Hohlkanal 15' in Richtung zur Trennstelle 3 entweichen, jedenfalls so lange, bis der Ventilkörper 16 die Querbohrung 15'' in der Ventilstange 15 abgedeckt hat. Der Rohrtrenner befindet sich in Trennstellung. Wird sodann wieder Wasser ablaufseitig entnommen, kommt es zu entsprechendem Druckabfall in der ablaufseitigen Beaufschlagungskammer 19, wodurch das Kolbentrennrohr 6 unter dem Einfluß des in der Zulaufkammer 17 herrschenden Versorgungsdruckes wieder in seine in Fig. 1 dargestellte Durchflußstellung gelangen kann.In the flow position of the pipe separator shown in FIG. 1, the piston flange 7 is held in its stop position on the inner flange 2 ″ ″ and thus the piston separating pipe 6 in its flow position shifted to the far right by the water pressure prevailing in the inlet chamber 14. The drinking water flowing in via the inlet connection 1 flows past the inlet valve body 16, which in its illustrated stop position is held on the limit stop 15 '''seated on the valve rod 15'. Furthermore, the tap water flows through the axial bore 6 V of the piston separating tube 6. Since the radial openings 6 'of the piston separating pipe are sealed by the ring seals 10 present on both sides thereof in the housing constriction 9, the inlet water flows exclusively through the piston separating pipe 6, at the end of which the check valve body 21, depending on the flow rate or flow rate, acts against the action of the Compression spring 22 pushes into the open position and thus finally over the drain chambers 19 get into the drain port 4. However, as soon as there is a sufficient pressure rise on the water outlet side and thus also in the outlet chamber 19, be it by interrupting the water outlet on the outlet side or for other reasons, for example due to suddenly occurring pump backpressures or the like, the check valve body 21 is against the valve seat surface 6 IV on the piston separating tube 6 pressed, which is thereby blocked for the water return. Then, by acting on the valve body 21 as well as the piston flange 18, the piston separating tube 6 is shifted to the left into its separating position, in which the radial openings 6 'come to lie at the level of the separating point 3 or the viewing window 2''and thus the desired separating position between the inlet and outlet side is reached. During the aforementioned displacement movement of the piston separating tube 6, the latter hits the inlet valve body 16 with its front valve seat surface 6 ″ and shifts it accordingly to the left. The water present in the inlet-side chamber 17 can escape via the hollow channel 15 'in the direction of the separation point 3, at least until the valve body 16 has covered the transverse bore 15''in the valve rod 15. The pipe separator is in the disconnected position. If water is then removed again on the outlet side, there is a corresponding drop in pressure in the outlet-side loading chamber 19, as a result of which the piston separating tube 6 can return to its flow position shown in FIG. 1 under the influence of the supply pressure prevailing in the inlet chamber 17.

Der in Fig. 2 dargestellte Rohrtrenner ist von grundsätzlich gleicher Beschaffenheit wie der in Fig. 1 abgebildete. Die dabei jeweils übereinstimmenden Teile sind mit den gleichen Bezugszeichen versehen. Unterschiedlich ist hier, daß das Rohrtrenner-Gehäuse aus einem abgestuften, im wesentlichen zylindrischen Mittelteil 23 sowie zwei beidendig davon angeordneten, sich trichterförmig verengenden Gehäuseendteilen 24, 25 besteht. Zwischen diesen Endteilen und dem Mittelteil 23 ist jeweils eine Kolbenmembran 26 bzw. 27 an ihrem Umfang eingespannt. Diese Membranen 26, 27 bilden zusammen mit den an den Enden des Kolbentrennrohres 6 vorhandenen Ringflanschen 26', 26'' bzw. 27', 27'' die von den in den Arbeitskammern 17 bzw. 19 auftretenden Wasserdrücken zu beaufschlagenden Kolbenflansche, die für die entsprechende Verschiebung des Kolbentrennrohres 6 in seine Durchfluß- oder Trennstellung sorgen. Außer den beiden O-Ringen 10 als Dichtringe sind hier noch die beiden Führungs- bzw. Gleitringe 10' im zylindrischen Mittelteil 23 gelagert. Die Funktion dieses Rohrtrenners stimmt mit dem in Fig. 1 dargestellten Rohrtrenner voll überein.The pipe separator shown in Fig. 2 is of basically the same nature as that shown in Fig. 1. The matching parts are provided with the same reference numerals. The difference here is that the pipe separator housing consists of a stepped, essentially cylindrical middle part 23 and two funnel-shaped housing end parts 24, 25 arranged at both ends thereof. Between these end parts and the central part 23, a piston membrane 26 or 27 is clamped on its circumference. These membranes 26, 27 together with the ring flanges 26 ', 26''and27', 27 '' present at the ends of the piston separating tube 6 form the piston flanges to be acted upon by the water pressures occurring in the working chambers 17 and 19, respectively, which are suitable for the provide appropriate displacement of the piston separating tube 6 in its flow or separation position. In addition to the two O-rings 10 as sealing rings, the two guide or slide rings 10 'are also supported in the cylindrical middle part 23. The function of this pipe separator fully corresponds to the pipe separator shown in Fig. 1.

Claims (9)

1. Rohrtrenner, insbesondere für Trinkwasserleitungen, mit in Durchströmungsrichtung jeweils hintereinanderliegendem Zulaufzylinder, leckwasserableitender Trennstelle und Ablaufzylinder sowie mit einem im Zulaufzylinder axial verschieblich geführten, einen zulaufwasserseitig beaufschlagbaren Kolbenflansch aufweisenden Kolbentrennrohr, das in seiner Trennstellung zulaufseitig durch ein Zulaufventil verschließbar und unter dem Druck des Zulaufwassers entgegen der Wirkung einer Rückstellfeder in eine die Trennstelle überbrückende Durchflußstellung zu verschieben ist, in der das Zulaufventil wie auch ein ablaufseitig vorhandenes Rückschlagventil öffnen, dadurch gekennzeichnet, daß das Kolbentrennrohr (6) an seinem ablaufseitigen Ende einen weiteren, ablaufwasserseitig zu beaufschlagenden Kolbenflansch (18) aufweist, durch das Rückschlagventil (21) zu verschließen ist und zwischen seinen beiden Kolbenflanschen (7, 18) einen radialen Durchbruch (6') besitzt, der in der Durchflußstellung des Kolbentrennrohres (6) zylindergehäuseseitig zu verschließen, dagegen in der Trennstellung mit der Trennstelle (3) des Zylindergehäuses (2) zu verbinden ist.1. tube separator, particularly for drinking water pipes, with one behind the other lying in the flow direction of the feed cylinder, leckwasserableitender separation point and outlet cylinder, and with an axially displaceably guided in the feed cylinder, a feed water side can be acted upon plunger flange having piston separator tube of the inlet side can be closed in its release position by a feed valve and under the pressure Z is to be shifted ulaufwassers against the action of a return spring in a separation point bridging flow position in which the intake valve open as well as a drain side existing non-return valve, characterized in that the piston separator tube (6) has a further, at its outlet-side end, proceeding on the water side to be acted upon piston flange ( 18) has to be closed by the check valve (21) and has a radial opening (6 ') between its two piston flanges (7, 18), which in the flow position de s Close the piston separating tube (6) on the cylinder housing side, but in the disconnected position it must be connected to the separating point (3) of the cylinder housing (2). 2. Rohrtrenner nach Anspruch 1, dadurch gekennzeichnet, daß das Rückschlagventil aus einem auf einer am ablaufseitigen Ende des Kolbentrennrohres (6) befestigten Ventilstange (20) gleitverschieblich sitzenden Ventilkörper (21) besteht, der durch eine Druckfeder (22) gegen das den Ventilsitz (6IV) bildende ablaufseitige Ende des Kolbentrennrohres (6) zu drücken ist.2. Pipe separator according to claim 1, characterized in that the check valve consists of one on the outlet end of the piston separating tube (6) attached valve rod (20) there is sliding valve body (21) which is to be pressed by a compression spring (22) against the outlet end of the piston separating tube (6) forming the valve seat (6 IV ). 3. Rohrtrenner nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Zulaufzylinder (2) und der Ablaufzylinder (5) zu einem gemeinsamen Zylindergehäuse vereinigt sind, das hinter der leckwasserableitenden Trennstelle (3) eine zum Kolbentrennrohr (6) heranreichende Einschnürung (9) aufweist, in der sich in entsprechendem axialem Abstand zwei Ringdichtungen (10) befinden, die in der Durchflußstellung des Kolbentrennrohres (6) am letzterem beidseitig seinesr radialen Durchbruchs (6') anliegen.3. Pipe separator according to claim 1 or 2, characterized in that the inlet cylinder (2) and the outlet cylinder (5) are combined to form a common cylinder housing, the constriction (9) reaching towards the piston separating pipe (6) behind the leakage-water-separating separation point (3). in which there are two ring seals (10) at an appropriate axial distance, which in the flow position of the piston separating tube (6) rest on the latter on both sides of its radial opening (6 '). 4. Rohrtrenner nach Anspruch 3, dadurch gekennzeichnet, daß im Zulaufzylinder (2) die Rückstellfeder (8) für das Kolbentrennrohr (6) untergebracht ist, die sich einerseits am zulaufwasserseitig beaufschlagbaren Kolbenflansch (7) und andererseits an der Gehäuseeinschnürung (9) abstützt.4. Pipe separator according to claim 3, characterized in that in the feed cylinder (2) the return spring (8) for the piston separating tube (6) is housed, which is supported on the one hand on the inlet water side piston flange (7) and on the other hand on the housing constriction (9). 5. Rohrtrenner nach Anspruch 3, dadurch gekennzeichnet, daß der im Ablaufzylinder (5) zwischen dessen Einschnürung (9) und dem ablaufwasserseitig beaufschlagbaren Kolbenflansch (18) des Kolbentrennrohres (6) vorhandene Raum (5'') mit Belüftungsöffnungen (11) versehen ist.5. Pipe separator according to claim 3, characterized in that in the discharge cylinder (5) between its constriction (9) and the discharge side of the piston flange (18) of the piston separating tube (6) existing space (5 '') is provided with ventilation openings (11) . 6. Rohrtrenner nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die beidendig am Kolbentrennrohr (6) vorhandenen Kolbenflansche (7, 18) mit an der Zylindergehäuseinnenwandung anliegenden Ringdichtungen (7', 18') versehen sind.6. Pipe separator according to one of claims 1 to 5, characterized in that the piston flanges (7, 18) provided at both ends on the piston separating tube (6) are provided with ring seals (7 ', 18') which bear against the inner wall of the cylinder housing. 7. Rohrtrenner nach einem der Ansprüche 1 bis 5, ddadurch gekennzeichnet, daß die an den beiden Enden des Kolbentrennrohres (6) vorhandenen Kolbenflansche (26', 26'' bzw. 27', 27'') mit flexiblen Membranen (26 bzw. 27) versehen sind, die an ihrem Umfang am Zylindergehäuse (23, 24 bzw. 25) eingespannt sind.7. tube separator according to any one of claims 1 to 5, ddadurch in that the existing on the both ends of the piston separator tube (6) piston flanges (26 ', 26''and27', 27 '') with flexible membranes (26 or . 27) are provided, which are clamped on their circumference on the cylinder housing (23, 24 or 25). 8. Rohrtrenner nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Gehäuse des Rohrtrenners (6) aus zwei abgedichtet miteinander verbundenen Zylindergehäusehälften besteht, deren zulaufseitig gelegene den mit der leckwasserableitenden Trennstelle (3) versehenen Zulaufzylinder (2) und dessen ablaufseitige den Ab-laufzylinder (5) bildet.8. Pipe separator according to one of claims 1 to 5, characterized in that the housing of the pipe separator (6) consists of two sealed cylinder housing halves, the inlet side of which is provided with the leakage-water-separating separation point (3) provided inlet cylinder (2) and its outlet side the A b-cylinder (5) forms. 9. Rohrtrenner nach Anspruch 7, dadurch gekennzeichnet, daß das Gehäuse des Rohrtrenners aus einem abgestuften, im wesentlichen zylindrischen Mittelteil (23) sowie zwei beidendig davon angeordneten, trichterförmig sich verengenden Gehäuseendteilen (24, 25) besteht, zwischen denen die Kolbenmembranen (26, 27) eingespannt sind, wobei das zylindrische Mittelteil (23) die leckwasserableitende Trennstelle (9) sowie je zwei am Kolbentrennrohr (6) anliegende Dichtringe (10) und Führungsringe (10') wobei die Dichtringe (10) mehr zur Mitte hin, die Führungsringe (10') dagegen weiter außen liegen.9. tube separator as claimed in claim 7 characterized in that the casing of the pipe disconnector from a stepped, substantially cylindrical central part on both ends arranged (23) and two of which funnel-shaped narrowing Gehäuseendteilen (24, 25), between which the piston membranes (26 , 27) are clamped, with the cylindrical middle part (23) the leakage-separating separation point (9) and two sealing rings (10) and piston rings (10) and guide rings (10 '), the sealing rings (10) being more towards the center Guide rings (10 '), however, are further out.
EP85109013A 1984-12-05 1985-07-19 Tube disconnector, especially for drinking-water conduit pipes Expired EP0183909B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85109013T ATE37058T1 (en) 1984-12-05 1985-07-19 PIPE SEPARATOR, ESPECIALLY FOR DRINKING WATER LINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3444300 1984-12-05
DE19843444300 DE3444300A1 (en) 1984-12-05 1984-12-05 PIPE DISCONNECTOR, IN PARTICULAR FOR DRINKING WATER PIPES

Publications (3)

Publication Number Publication Date
EP0183909A2 true EP0183909A2 (en) 1986-06-11
EP0183909A3 EP0183909A3 (en) 1987-03-11
EP0183909B1 EP0183909B1 (en) 1988-09-07

Family

ID=6251935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109013A Expired EP0183909B1 (en) 1984-12-05 1985-07-19 Tube disconnector, especially for drinking-water conduit pipes

Country Status (3)

Country Link
EP (1) EP0183909B1 (en)
AT (1) ATE37058T1 (en)
DE (2) DE3444300A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2205385A (en) * 1987-05-15 1988-12-07 Oil Control Spa Improvements in a load holding and control valve, in particular for hydraulic circuits with either open or closed centre directional control valve
EP1422351A1 (en) * 2002-11-22 2004-05-26 Rudolf Vollmer Backflow preventer
EP1350896A3 (en) * 2002-04-03 2004-12-29 Hans Sasserath & Co Kg Valve arrangement for a back flow preventer
US7059340B2 (en) 2002-04-03 2006-06-13 Hans Sasserath & Co Kg Valve assembly for pipe disconnectors

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088861A2 (en) * 1982-03-15 1983-09-21 Lang Apparatebau Gmbh Back flow preventer, especially for water supply conduits
EP0109919A2 (en) * 1982-10-25 1984-05-30 Beckers, Ernst Device for temporarily disconnecting the flow in a tube, especially in a fresh water pipe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088861A2 (en) * 1982-03-15 1983-09-21 Lang Apparatebau Gmbh Back flow preventer, especially for water supply conduits
EP0109919A2 (en) * 1982-10-25 1984-05-30 Beckers, Ernst Device for temporarily disconnecting the flow in a tube, especially in a fresh water pipe

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2205385A (en) * 1987-05-15 1988-12-07 Oil Control Spa Improvements in a load holding and control valve, in particular for hydraulic circuits with either open or closed centre directional control valve
GB2205385B (en) * 1987-05-15 1991-03-27 Oil Control Spa Improvements in a load holding and control valve,in particular for hydraulic circuits with either open or closed centre directional control valve.
EP1350896A3 (en) * 2002-04-03 2004-12-29 Hans Sasserath & Co Kg Valve arrangement for a back flow preventer
US7059340B2 (en) 2002-04-03 2006-06-13 Hans Sasserath & Co Kg Valve assembly for pipe disconnectors
EP1422351A1 (en) * 2002-11-22 2004-05-26 Rudolf Vollmer Backflow preventer

Also Published As

Publication number Publication date
ATE37058T1 (en) 1988-09-15
EP0183909A3 (en) 1987-03-11
DE3564838D1 (en) 1988-10-13
DE3444300A1 (en) 1986-06-05
EP0183909B1 (en) 1988-09-07

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