EP0573980A1 - Soupape d'arrête à trois voies notamment pour systèmes de distribution sanitaires - Google Patents

Soupape d'arrête à trois voies notamment pour systèmes de distribution sanitaires Download PDF

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Publication number
EP0573980A1
EP0573980A1 EP93109287A EP93109287A EP0573980A1 EP 0573980 A1 EP0573980 A1 EP 0573980A1 EP 93109287 A EP93109287 A EP 93109287A EP 93109287 A EP93109287 A EP 93109287A EP 0573980 A1 EP0573980 A1 EP 0573980A1
Authority
EP
European Patent Office
Prior art keywords
valve
cutoff unit
shutter
inlet
chamber
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Withdrawn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
EP93109287A
Other languages
German (de)
English (en)
Inventor
Renato Galetti
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.)
BRANDONI S.P.A.
Original Assignee
BRANDONI SpA
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 BRANDONI SpA filed Critical BRANDONI SpA
Publication of EP0573980A1 publication Critical patent/EP0573980A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/077—Arrangement of backflow preventing devices
    • 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
    • E03C1/106—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using two or more check valves
    • 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 three-way cutoff unit particularly for sanitary-water distribution systems.
  • a cutoff unit is a safety valve meant to avoid the return of water into the public potable-water distribution system, when the pressure in this system is temporarily lower than the pressure in the possibly contaminated (private) system.
  • French Patent No. 2544832 relates to a valve body with one-way elements having an arrangement which can be defined as classic, with a membrane which is arranged above the middle chamber and which forms an upper half-chamber connected to the water system upstream of the inlet one-way valve.
  • Said valve is a typical example of typical construction, which has sensitivity problems in detecting the pressure differential.
  • European Patent No. 0084754 provides for a hollow stem which constitutes an air venting opening which can facilitate the emptying of the middle chamber, i.e. to make it quicker by facilitating the flow of air into the middle chamber.
  • German Patent No. 431407 has a particularly complicated valve structure, but substantially remains a classic structure with a solid and monolithic stem.
  • U.S. Patent No. 3906987 eliminates the actuation membrane, but provides for a venting piston which acts if a pressure differential lower than the preset value is detected; said piston is arranged on the upstream one-way valve to open the discharge valve.
  • a principal object of the present invention is to eliminate or substantially reduce the drawbacks described above by providing a three-way cutoff unit particularly for sanitary-water distribution systems which considerably increases the sensitivity of said cutoff unit to pressure changes, even to instantaneous ones.
  • Another object of the present invention is to provide a cutoff unit which allows simple and rapid access to the valves for their maintenance.
  • a further object of the present invention is to provide a highly reliable cutoff unit which is relatively easy to manufacture and at competitive costs.
  • a three-way cutoff unit particularly for sanitary-water distribution systems, comprising: a valve body connectable to a water pipe and forming a central chamber delimited by a directional inlet valve, which is arranged at a fluid inlet, and by a directional outlet valve, which is arranged at a fluid outlet; and a shutter element provided within said chamber for engaging a discharge hole so as to close it tightly, said shutter element being connected to a membrane which is arranged within, and sealingly divides, a cavity which is superimposed on said central chamber, forming a control chamber which is connected to said inlet by a duct, said shutter being elastically loaded by a contrast spring, and said shutter being internally provided with a control element for controlling a smaller port having a smaller cross-section than the discharge hole.
  • a three-way cutoff unit particularly for sanitary-water distribution systems comprises a valve body, generally designated by the reference numeral 1, which can be interposed on a water pipe and which forms a central chamber 2 delimited by a directional inlet valve, generally designated by the reference numeral 3, which is connected to a potable water inlet 4, and by a directional outlet valve, generally designated by the reference numeral 5, which is arranged on a potable water distribution outlet 6.
  • a shutter element is provided within the chamber 1, acts on a discharge hole 8 so as to close it tightly, and is connected to a membrane 9 which is arranged within, and sealingly divides, a cavity 10 superimposed on and connected to the central chamber.
  • the membrane 9 forms a control chamber 10a, which is connected to the inlet 4 by means of a duct 11; a first threaded seat 12 for accommodating a pressure gauge is formed on the duct 11.
  • the shutter is elastically loaded by a contrast spring 13.
  • Another pressure gauge can be arranged within a second threaded seat 14 located on the distribution outlet 6.
  • the shutter 7 is internally provided with a control element for controlling a smaller port 15 having a smaller cross-section than the discharge hole 8.
  • the shutter element 7 comprises a sheath 16, having an elongated longitudinal extension, being sealingly inserted in the central chamber 1 and sealingly entering the cavity 10, and a valve 17 for closing the discharge hole 8.
  • the control element comprising a stem 18 connected to the closure valve 17, is inserted in the sheath 16.
  • the sheath 16 selectively controls the opening and closure of the smaller port 15 formed within the closure valve 17. Connection is obtained by means of a pin 21 which, by means of slots 23, enters and is connected to a portion 20 which controls the port 15 by means of a point 19.
  • the smaller port 15 is connected to the central chamber 2, when it is open, for water discharge, by means of an opening 24 formed in the valve 17.
  • the sheath 16 is fixed to the membrane 9 by means of a pair of disks 25 and 26 and of an annular presser 27.
  • the disks 25 and 26 are arranged respectively upstream and downstream of the membrane 9, and the contrast spring 13 engages against the disk 26, abutting with its other end against the end wall of a cylindrical portion 10b of the cavity 10.
  • the stem 18 protrudes from the valve body 1 on the side opposite to the discharge port 8 within an element 28 for compensating the hydrostatic load of the closure valve.
  • the discharge hole 8 is formed in a wall 29 of the valve body 1 which can be fully removed from said valve body in order to allow access to the central chamber 2 and to the directional inlet and outlet valves 3 and 5.
  • the wall 29 is fixed to the remaining part of the valve body 1 by means of screws 46.
  • Each directional valve 3 (5) has a conical element 30 (31) which is rigidly coupled to a shaft 32 (33) which is slidingly arranged within a hollow conical body 34 (35) having a flanged end 36 (37) against which a cylindrical spring 38 (39) abuts; the other end of said spring 38 (39) engages against an internal face of the conical element 30 (31). Said conical element 30 (31) slides freely and engages against an annular raised portion 40 (41) to close the inlet 4 or the outlet 6 respectively.
  • the hollow conical body 34 (35) is fixed to the valve body 1 by means of a respective flange 42 (43) the respective fixing screws 44 (45) whereof can be accessed from the opening of the removable wall 29.
  • the spring 13 moves until it reaches its maximum stroke; by means of the stem, said spring moves the valve 17 into its open position (figure 3), fully opening the discharge hole 8 and thus allowing the water present in the central chamber 2 to discharge.
  • the one-way valves 3 and 5 are in closed position.
  • the spring 13 would immediately open the valve 17, thus preventing any possible contamination of the upstream potable water with water which has already flowed into the distribution system.
  • the wall 29 allows, by means of its removal, direct intervention inside the central chamber 2, furthermore allowing rapid replacement of both the shutter element 7 and the valves 3 and 5, the respective fixing screws 44 and 45 whereof, as previously mentioned, directly face the opening left by the wall 29.
  • inlet 4 and the distribution outlet 6 on elements which are associated with the valve body; in this manner it is possible to vary the diameters and dimensions of the connections without modifying the valve body.
  • the materials employed, as well as the dimensions, may be any according to the requirements.

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)
  • Devices For Dispensing Beverages (AREA)
  • Safety Valves (AREA)
EP93109287A 1992-06-12 1993-06-09 Soupape d'arrête à trois voies notamment pour systèmes de distribution sanitaires Withdrawn EP0573980A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI921459 1992-06-12
ITMI921459A IT1258989B (it) 1992-06-12 1992-06-12 Disconnettore a tre vie particolarmente per impianti di distribuzione di acqua sanitaria

Publications (1)

Publication Number Publication Date
EP0573980A1 true EP0573980A1 (fr) 1993-12-15

Family

ID=11363509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93109287A Withdrawn EP0573980A1 (fr) 1992-06-12 1993-06-09 Soupape d'arrête à trois voies notamment pour systèmes de distribution sanitaires

Country Status (2)

Country Link
EP (1) EP0573980A1 (fr)
IT (1) IT1258989B (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1577370A (en) * 1925-05-25 1926-03-16 Frederick A Schossow Flushing valve
US3192782A (en) * 1961-11-02 1965-07-06 Robertshaw Controls Co Flexible seal
FR2544832A1 (fr) * 1983-04-22 1984-10-26 Bayard Sa Ets Dispositif anti-retour pour reseau d'alimentation en eau
EP0084754B1 (fr) * 1982-01-26 1985-09-25 SOCLA SA Société dite Disconnecteur pour des canalisations hydrauliques
EP0339104A1 (fr) * 1988-04-26 1989-11-02 Honeywell-Braukmann GmbH Robinetterie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1577370A (en) * 1925-05-25 1926-03-16 Frederick A Schossow Flushing valve
US3192782A (en) * 1961-11-02 1965-07-06 Robertshaw Controls Co Flexible seal
EP0084754B1 (fr) * 1982-01-26 1985-09-25 SOCLA SA Société dite Disconnecteur pour des canalisations hydrauliques
FR2544832A1 (fr) * 1983-04-22 1984-10-26 Bayard Sa Ets Dispositif anti-retour pour reseau d'alimentation en eau
EP0339104A1 (fr) * 1988-04-26 1989-11-02 Honeywell-Braukmann GmbH Robinetterie

Also Published As

Publication number Publication date
ITMI921459A0 (it) 1992-06-12
ITMI921459A1 (it) 1993-12-12
IT1258989B (it) 1996-03-11

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