EP0183909A2 - Déconnecteur de tuyaux, en particulier pour conduites d'eau potable - Google Patents

Déconnecteur de tuyaux, en particulier pour conduites d'eau potable 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)
English (en)
Other versions
EP0183909A3 (en
EP0183909B1 (fr
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/de
Publication of EP0183909A2 publication Critical patent/EP0183909A2/fr
Publication of EP0183909A3 publication Critical patent/EP0183909A3/de
Application granted granted Critical
Publication of EP0183909B1 publication Critical patent/EP0183909B1/fr
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)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
EP85109013A 1984-12-05 1985-07-19 Déconnecteur de tuyaux, en particulier pour conduites d'eau potable Expired EP0183909B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85109013T ATE37058T1 (de) 1984-12-05 1985-07-19 Rohrtrenner, insbesondere fuer trinkwasserleitungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843444300 DE3444300A1 (de) 1984-12-05 1984-12-05 Rohrtrenner, insbesondere fuer trinkwasserleitungen
DE3444300 1984-12-05

Publications (3)

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

Family

ID=6251935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109013A Expired EP0183909B1 (fr) 1984-12-05 1985-07-19 Déconnecteur de tuyaux, en particulier pour conduites d'eau potable

Country Status (3)

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

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 (fr) * 2002-11-22 2004-05-26 Rudolf Vollmer Dispositif anti-retour
EP1350896A3 (fr) * 2002-04-03 2004-12-29 Hans Sasserath & Co Kg Arrangement de soupapes pour un disjoncteur hydraulique
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 (fr) * 1982-03-15 1983-09-21 Lang Apparatebau Gmbh Soupape anti-retour spécialement pour des conduites d'eau potable
EP0109919A2 (fr) * 1982-10-25 1984-05-30 Beckers, Ernst Dispositif pour disconnecter temporairement l'écoulement dans un tuyau, spécialement dans un tuyau d'eau potable

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088861A2 (fr) * 1982-03-15 1983-09-21 Lang Apparatebau Gmbh Soupape anti-retour spécialement pour des conduites d'eau potable
EP0109919A2 (fr) * 1982-10-25 1984-05-30 Beckers, Ernst Dispositif pour disconnecter temporairement l'écoulement dans un tuyau, spécialement dans un tuyau d'eau potable

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 (fr) * 2002-04-03 2004-12-29 Hans Sasserath & Co Kg Arrangement de soupapes pour un disjoncteur hydraulique
US7059340B2 (en) 2002-04-03 2006-06-13 Hans Sasserath & Co Kg Valve assembly for pipe disconnectors
EP1422351A1 (fr) * 2002-11-22 2004-05-26 Rudolf Vollmer Dispositif anti-retour

Also Published As

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

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