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EP0709527A1 - Dispositif de prévention de retour d'encoulement - Google Patents

Dispositif de prévention de retour d'encoulement Download PDF

Info

Publication number
EP0709527A1
EP0709527A1 EP94117162A EP94117162A EP0709527A1 EP 0709527 A1 EP0709527 A1 EP 0709527A1 EP 94117162 A EP94117162 A EP 94117162A EP 94117162 A EP94117162 A EP 94117162A EP 0709527 A1 EP0709527 A1 EP 0709527A1
Authority
EP
European Patent Office
Prior art keywords
prevention device
backflow prevention
closure body
spring
seal
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
EP94117162A
Other languages
German (de)
English (en)
Other versions
EP0709527B1 (fr
Inventor
Jürgen Dipl.Ing. Jürgen Bälz Controls GmbH Bälz
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.)
JUERGEN BAELZ CONTROLS GmbH
Original Assignee
JUERGEN BAELZ CONTROLS 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 JUERGEN BAELZ CONTROLS GmbH filed Critical JUERGEN BAELZ CONTROLS GmbH
Priority to DE59409895T priority Critical patent/DE59409895D1/de
Priority to EP19940117162 priority patent/EP0709527B1/fr
Publication of EP0709527A1 publication Critical patent/EP0709527A1/fr
Application granted granted Critical
Publication of EP0709527B1 publication Critical patent/EP0709527B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E03C1/106—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 invention relates to a backflow prevention device.
  • Backflow prevention devices are used for liquid and gaseous media in order to prevent the medium flowing through the safety device from getting out of the device back to the entrance and from there back into the supply network.
  • known devices are provided with two non-return valves arranged one behind the other in a common housing, which have different closing springs and can be overcome with sufficient supply pressure of the flow medium.
  • the invention has for its object to reduce the size of the chamber located between the two check valves in the longitudinal direction of the device. This is achieved in that the two seats for the relief valve and the inlet-side backflow preventer are arranged radially concentrically on the same component, and the guide means for the relief valve and the inlet-side backflow preventer are located between the seats of the component within the chamber. Furthermore, the actuating means for the relief valve is placed in the area in front of the non-return valve on the inlet side and is preferably provided with a spring-elastic sealing element, in that the sealing element simultaneously acts as a spring in the opening direction of the relief valve.
  • the common setpoint spring for the inlet-side backflow preventer and relief valve is also placed as a tension spring in the inflow area of the device.
  • the seat of the outlet-side backflow preventer is equal or larger with respect to its outer diameter than the outer diameter of the cone of the inlet-side backflow preventer.
  • the cylindrical casing (1) has the stepped bores (2, 3) on both sides, which have different lengths. In the area of the offset bores (2, 3) there are opposite bores (4) with respect to the center line of the housing shell (1). Furthermore, the jacket (1) has the circular opening (41) in the region of the stepped bore (2). In the area of the stepped hole (3), the threaded part (5), the holes (4), the input part (6) is connected to the jacket (1). In the area of the stepped hole (2), the holes (4), the middle part (8), the outlet part (7) are connected to the jacket (1) by means of threaded screws (5). The thread of the screws (5) seals in the threaded holes of the parts (6, 7, 8).
  • the middle part (8) has the stepped through hole (32, 33), which has an enlarged diameter (42) in the middle part (8) and a 45 ° bevel (43) at the beginning of the hole (32).
  • the groove (30) for receiving the square seal (31) is located in the area of the slope (43).
  • the output part (7) abuts with the central part (8) while enclosing the square seal (34) and has the bore (44), which is slightly larger than the inside diameter of the square seal (34).
  • the bore (44) widens in the central part of the output part (7) and supports the hub (37) via the webs (36), which is provided with a through bore (45).
  • the cone (38) is guided in the through bore (45) with its shaft (39) so as to be longitudinally displaceable and is under the spring preload of a spring (40).
  • the cone (38) has a 45 ° bevel (46) on which the square sealing element (34) can seal.
  • the input part (6) is provided with a stepped through hole (11, 12) and has the stepped part (15, 16) in the outer region.
  • the resilient seal (35) is tightly welded to the stepped area (15) of the input part (6).
  • the resilient seal (35) in the area (18) of the closure body (17) is also tightly welded.
  • the through hole (23) of the closure body (17) merges into the 45 ° bevel (20) and has the outside diameter radially opposite the bevel (20) which is also 45 ° bevel (25).
  • the closure body (17) is guided in the stepped bore (32) over the webs (21) arranged between the bevels (20, 25) and can be sealed with its bevel (25) against the square sealing element (31).
  • This certain increase in pressure is predetermined by the spring forces (28, 35) and the two active surfaces on the one hand of the resilient seal (35) and on the other hand of the cone (24) with the outer diameter of the square seal (19).
  • Fig. 3 shows the operation of the device when a predetermined pressure difference between the inlet (13) and outlet (47) is exceeded.

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)
  • Safety Valves (AREA)
EP19940117162 1994-10-31 1994-10-31 Dispositif de prévention de retour d'encoulement Expired - Lifetime EP0709527B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59409895T DE59409895D1 (de) 1994-10-31 1994-10-31 Rückflussverhinderungseinrichtung
EP19940117162 EP0709527B1 (fr) 1994-10-31 1994-10-31 Dispositif de prévention de retour d'encoulement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19940117162 EP0709527B1 (fr) 1994-10-31 1994-10-31 Dispositif de prévention de retour d'encoulement

Publications (2)

Publication Number Publication Date
EP0709527A1 true EP0709527A1 (fr) 1996-05-01
EP0709527B1 EP0709527B1 (fr) 2001-10-04

Family

ID=8216427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940117162 Expired - Lifetime EP0709527B1 (fr) 1994-10-31 1994-10-31 Dispositif de prévention de retour d'encoulement

Country Status (2)

Country Link
EP (1) EP0709527B1 (fr)
DE (1) DE59409895D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014100172U1 (de) * 2014-01-16 2015-04-20 Viega Gmbh & Co. Kg Sicherungsvorrichtung zum Schutz einer Trinkwasser-Installation gegen Rückfließen von gebrauchtem oder verunreinigtem Wasser
CN107366795A (zh) * 2017-06-21 2017-11-21 合肥助航生态农业科技有限公司 一种恒压灌溉管道

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2414893A1 (de) * 1974-03-28 1975-10-02 Braukmann Armaturen Ventil
DE3616589A1 (de) * 1986-05-16 1987-11-19 Baelz Juergen Controls Rueckflussverhinderungseinrichtung, insbesondere in trinkwasserleitungen
WO1989011611A1 (fr) * 1988-05-18 1989-11-30 Valvtec Pty Ltd Clapet antirefouleur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2414893A1 (de) * 1974-03-28 1975-10-02 Braukmann Armaturen Ventil
DE3616589A1 (de) * 1986-05-16 1987-11-19 Baelz Juergen Controls Rueckflussverhinderungseinrichtung, insbesondere in trinkwasserleitungen
WO1989011611A1 (fr) * 1988-05-18 1989-11-30 Valvtec Pty Ltd Clapet antirefouleur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014100172U1 (de) * 2014-01-16 2015-04-20 Viega Gmbh & Co. Kg Sicherungsvorrichtung zum Schutz einer Trinkwasser-Installation gegen Rückfließen von gebrauchtem oder verunreinigtem Wasser
DE102014119719B4 (de) 2014-01-16 2024-06-06 Viega Technology Gmbh & Co. Kg Sicherungsvorrichtung zum Schutz einer Trinkwasser-Installation gegen Rückfließen von gebrauchtem oder verunreinigtem Wasser
CN107366795A (zh) * 2017-06-21 2017-11-21 合肥助航生态农业科技有限公司 一种恒压灌溉管道

Also Published As

Publication number Publication date
EP0709527B1 (fr) 2001-10-04
DE59409895D1 (de) 2001-11-08

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