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EP0069234A1 - Dispositif pour protéger des canalisations d'eau potable contre le reflux d'eaux usées - Google Patents

Dispositif pour protéger des canalisations d'eau potable contre le reflux d'eaux usées Download PDF

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Publication number
EP0069234A1
EP0069234A1 EP82104912A EP82104912A EP0069234A1 EP 0069234 A1 EP0069234 A1 EP 0069234A1 EP 82104912 A EP82104912 A EP 82104912A EP 82104912 A EP82104912 A EP 82104912A EP 0069234 A1 EP0069234 A1 EP 0069234A1
Authority
EP
European Patent Office
Prior art keywords
valve
piston
shut
line
valve body
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
EP82104912A
Other languages
German (de)
English (en)
Other versions
EP0069234B1 (fr
Inventor
Alfred Waletzko
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 AT82104912T priority Critical patent/ATE9367T1/de
Publication of EP0069234A1 publication Critical patent/EP0069234A1/fr
Application granted granted Critical
Publication of EP0069234B1 publication Critical patent/EP0069234B1/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
    • E03C1/104—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 device for protecting drinking water pipes against backflow of process water, with a shut-off valve installed in the drinking water supply line in front of a hydraulic pipe separator and controlling it, the valve body of which can be adjusted by means of a piston arrangement which can be acted upon from two sides, the actuation side of which faces away from the valve body can be optionally selected via a control valve is to be connected to the drinking water supply line or a discharge line leading to the outside, while the other supply side can also be exposed to the water inlet pressure, and a further discharge line branches off between the shut-off valve and the pipe separator, which is open when the shut-off valve is closed and closed when the shut-off valve is open.
  • piston arrangement consists of two pistons connected in series in separate cylinders, each with a piston rod firmly connected to them.
  • One of these two piston rods carries at its outer end the valve body of the shut-off valve and is drilled centrally so that the underside of the associated piston is constantly acted upon by the water inflow pressure.
  • the other piston rod lies between the two pistons and serves as a slide valve for the relief line located between the shut-off valve and the pipe separator, which can thereby be opened or blocked.
  • This previously known double piston arrangement is still structurally very complex.
  • the invention has for its object to improve and improve the known device of the type in question in such a way that the piston arrangement actuating the shut-off valve is of an even simpler design and has greater operational and switching reliability.
  • This object is achieved based on the generic device according to the invention in that the piston assembly consists of a double-acting single piston with the valve body carrying piston rod, the piston rod facing the piston rod via a switching valve in opposition to the other piston side to connect either with the drinking water supply line and a relief line is.
  • the control as well as the switching valve can be controlled or actuated both electromechanically and fundamentally hydraulically, and also by manual actuation.
  • electromagnetic control it is advantageous, as is known, from an electrical device arranged behind the pipe separator in the pressurized water line tromagnetic flow rate made use of, which switches the control valve designed as an electromagnetic three-way valve, which is assigned to the piston application side facing away from the valve body.
  • an electromagnetic two-way valve is expediently used for the switching valve built into the common line section leading to the outside atmosphere, which is to be opened and closed by the flow monitor in opposition to the three-way valve.
  • valve control For manual operation of the valve control, it is advisable to combine the control valve assigned to the piston side facing away from the valve body and the switching valve assigned to the other piston side to form a common, manually operated slide valve.
  • the manually operated slide of the slide valve is under the action of a spring that tries to hold it in its extended switching position, while it is in its other, retracted switching position is to be locked in the manner of a bayonet lock.
  • the manually operated slide valve which combines the control and switching valve can also be designed such that it has a pressurized water supply line branching off the fresh water supply line on the one hand and a discharge line leading to the outside alternately with one and the other
  • the piston side can be connected, the relief line branching off between the shut-off valve and the pipe separator being permanently connected to the piston side facing the piston rod.
  • the piston side facing the piston rod and the valve body carried by it can also be connected directly to the pressurized water line for the purpose of opening the shut-off valve.
  • the device shown in Fig. 1 for protecting drinking water pipes against backflow of process water essentially consists of the shut-off valve 2 built into the drinking water supply line 1 and the downstream hydraulic pipe separator 3 controlled by the latter and a flow monitor (not shown) installed in the process water side 4 thereof.
  • the pipe separator 3 is of a known type. It essentially consists of the piston separating tube 6 which is longitudinally displaceable in the cylinder 5, the valve body 7 projecting therein, the fixedly arranged valve body 7, the return springs (not shown in more detail) which try to press the piston separating tube 6 into the retracted separation position shown, and the backflow preventer 9 arranged in the discharge port 8.
  • the drinking water supply line is completely separated at point 10, so that a backflow from the process water side 4 into the drinking water supply line 1 is not possible.
  • the separation point 10 is surrounded by a collecting funnel 12 provided with a drain line 11.
  • shut-off valve 2 If the shut-off valve 2 is opened, as will be described in more detail below, then the building up water pressure in front of the piston separating tube 6, that the latter is displaced axially. After the piston separating tube 6 has been sealingly inserted into the outlet connection 8 and thus has made a tight connection between the inlet and outlet, the upper end of the piston separating tube 6 slides off from the valve body 7 so that the water can flow through, the backflow preventer 9 being compressed its return spring 13 is moved into the flow position.
  • the valve body 14 of the shut-off valve 2 is fastened to the lower end of a piston rod 15 which belongs to the piston 16, which is designed as a double piston and is axially displaceably guided in the cylinder 17.
  • the side 16 'of the piston facing away from the valve body 14 or the corresponding half of the working chamber is optionally connected via the supply line b and a three-way valve 18 with the pressurized water supply line 19 branching off from the drinking water supply line 1 upstream of the shut-off valve 2 or its orifice connection a or with the outlet funnel 12 leading discharge line c to connect.
  • the other piston side 16 ′′ or the corresponding working chamber half is in constant communication via the cylinder housing bore d with the relief line e branching off between the shut-off valve 2 and the pipe separator 3. Both lines d, e open into a common line section f, in which a switching valve 20 is installed.
  • Both the three-way valve 18 and the switching valve 20 can be actuated electromagnetically by the flow monitor (not shown) installed in the service water side 4.
  • This flow monitor is designed in such a way that it responds to the smallest amount of water on the domestic water side 4, namely the Elektromag netvalve 18, 20 acted so that the housing bore b located above the piston 16 is connected to the discharge line c leading to the outside while simultaneously shutting off the pressurized water supply line a, while the valve 20 closes the discharge line f, so that the holes d and e follow are cordoned off from the outside.
  • valve body 14 This causes the valve body 14 to rise under the influence of the water inlet pressure, the water inlet pressure after lifting the valve body 14 from the valve seat communicating via the bores e and d also the piston underside 16 ", so that the piston 16 and the valve body 14 finally
  • the piston separating tube 6 is moved into its flow-through position, in which the free end of the piston tube 6 moves into the outlet connection 8 and thus the domestic water side 4 is supplied with drinking water, and if there is no water withdrawal on the domestic water side 4, it occurs a corresponding increase in pressure which ensures that the flow switch is responsive, then 18 and 20 acts on the valves in phase opposition sense.
  • the cylinder housing hole e is connected to the pressurized water supply line a and the e nt lastungs effetively c locked open while the two-way electromagnetic valve 20, so that the knockout lben 16 shut down and the shut-off valve 2 can be closed, while the open, leading line e and f displaces the water from the space between the shut-off valve and the pipe separator and thus gives the piston separating pipe 6 the possibility under the action of its compression springs in retract the separation position shown in Fig. 1.
  • FIG. 1 If the device shown in FIG. 1 is not to be adjusted electromagnetically but manually by a flow monitor, then the valves 18 and 20 become the ones to be operated by hand shown in FIGS. 2 and 3 Slide valve summarized.
  • This slide valve has a valve housing 21 with the connections a to f for the lines or connections correspondingly named in FIG. 1.
  • the valve spool 22 which is axially displaceable in the valve housing 21 is provided with four sealing rings 23 arranged coaxially one behind the other and is under the action of a compression spring 24 which attempts to hold the spool 22 in the switching position shown in FIG. 2.
  • This switch position corresponds to the disconnected position of the pipe separator 3 shown in FIG. 1.
  • the lines a, b are connected to one another, while the line c is shut off.
  • the lines d, e and f are connected to one another, so that the underside of the piston 16 "is connected to the outside atmosphere.
  • the shut-off valve 2 is closed. If the piston separating tube 6 is to be brought into its flow position, the slide 22 is moved into the position shown in FIG 3 shifted position in which it can be latched in the manner of a bayonet-type lock in the correspondingly configured mouth 21 'of the housing 21 by means of the hand knob 25.
  • the pressurized water which acts on the piston separating tube 6 and is initially prevented by the valve body 7 from continuing to flow pushes the piston separating tube 6 into the outlet connection 8, whereupon the piston separating tube 6 then lifts off the valve body 7 and thus releases the water flow.
  • valve slide 26 can be locked in its two end positions in this case as well.
  • the manual control valves shown in FIGS. 2 to 5 can also be operated electromagnetically, if necessary, and can be controlled, for example, by a suitably designed flow monitor in the process water side.
  • the valve spool 22 or 26 can also be controlled hydraulically from the process water side, whereby it is only necessary to ensure that the process water must not come into contact with the fresh water on the supply side.

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)
  • Fluid-Driven Valves (AREA)
  • Multiple-Way Valves (AREA)
  • Magnetically Actuated Valves (AREA)
  • Check Valves (AREA)
EP82104912A 1981-07-03 1982-06-04 Dispositif pour protéger des canalisations d'eau potable contre le reflux d'eaux usées Expired EP0069234B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82104912T ATE9367T1 (de) 1981-07-03 1982-06-04 Vorrichtung zum schutz von trinkwasserleitungen gegen rueckfliessendes brauchwasser.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813126212 DE3126212A1 (de) 1981-07-03 1981-07-03 Vorrichtung zum schutz von trinkwasserleitungen gegen rueckfliessendes brauchwasser
DE3126212 1981-07-03

Publications (2)

Publication Number Publication Date
EP0069234A1 true EP0069234A1 (fr) 1983-01-12
EP0069234B1 EP0069234B1 (fr) 1984-09-12

Family

ID=6135990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104912A Expired EP0069234B1 (fr) 1981-07-03 1982-06-04 Dispositif pour protéger des canalisations d'eau potable contre le reflux d'eaux usées

Country Status (3)

Country Link
EP (1) EP0069234B1 (fr)
AT (1) ATE9367T1 (fr)
DE (1) DE3126212A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189499A1 (fr) * 1985-01-30 1986-08-06 Honeywell-Braukmann GmbH Déconnecteur de tuyau
EP0195398A3 (fr) * 1985-03-19 1987-05-06 Honeywell-Braukmann GmbH Combinaison de clapets
CN107597685A (zh) * 2017-10-23 2018-01-19 广州轻机机械设备有限公司 集中供应原液型清洗分站

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102642063B (zh) * 2012-05-21 2014-05-07 蒋海翔 便携式气体钎焊焊枪的减压阀组件

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2747941A1 (de) * 1977-10-26 1979-05-10 Waletzko Alfred Apparatebau Vorrichtung zum schutz von trinkwasserleitungen gegen rueckfliessendes brauchwasser
DE2849825A1 (de) * 1978-11-17 1980-05-29 Waletzko Alfred Apparatebau Trinkwasser-durchflussarmatur mit in die trinkwasserversorgungsleitung eingebautem durchflusswaechter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000430C2 (de) * 1980-01-08 1986-05-07 Lang Apparatebau GmbH, 8227 Siegsdorf Trinkwasser-Durchflußarmatur mit Durchflußwächter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2747941A1 (de) * 1977-10-26 1979-05-10 Waletzko Alfred Apparatebau Vorrichtung zum schutz von trinkwasserleitungen gegen rueckfliessendes brauchwasser
DE2849825A1 (de) * 1978-11-17 1980-05-29 Waletzko Alfred Apparatebau Trinkwasser-durchflussarmatur mit in die trinkwasserversorgungsleitung eingebautem durchflusswaechter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0189499A1 (fr) * 1985-01-30 1986-08-06 Honeywell-Braukmann GmbH Déconnecteur de tuyau
EP0195398A3 (fr) * 1985-03-19 1987-05-06 Honeywell-Braukmann GmbH Combinaison de clapets
CN107597685A (zh) * 2017-10-23 2018-01-19 广州轻机机械设备有限公司 集中供应原液型清洗分站

Also Published As

Publication number Publication date
ATE9367T1 (de) 1984-09-15
DE3126212C2 (fr) 1990-06-21
DE3126212A1 (de) 1983-01-20
EP0069234B1 (fr) 1984-09-12

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