EP0069234B1 - Vorrichtung zum Schutz von Trinkwasserleitungen gegen rückfliessendes Brauchwasser - Google Patents

Vorrichtung zum Schutz von Trinkwasserleitungen gegen rückfliessendes Brauchwasser Download PDF

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Publication number
EP0069234B1
EP0069234B1 EP82104912A EP82104912A EP0069234B1 EP 0069234 B1 EP0069234 B1 EP 0069234B1 EP 82104912 A EP82104912 A EP 82104912A EP 82104912 A EP82104912 A EP 82104912A EP 0069234 B1 EP0069234 B1 EP 0069234B1
Authority
EP
European Patent Office
Prior art keywords
valve
piston
conduit
water
drinking
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.)
Expired
Application number
EP82104912A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0069234A1 (de
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/de
Application granted granted Critical
Publication of EP0069234B1 publication Critical patent/EP0069234B1/de
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 flowing back domestic 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.
  • the piston arrangement which allows the valve body of the shut-off valve to be adjusted 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 the valve body of the shut-off valve at its outer end and is pierced centrally so that the water piston pressure is constantly applied to the underside of the associated piston.
  • 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.
  • the piston arrangement consists of a double piston which can be acted upon with the piston rod carrying the valve body, the piston side facing the piston rod optionally being connected to the drinking water supply line and a relief line via a switching valve in opposition to the other piston side is.
  • the control as well as the switching valve can be controlled or actuated both electromechanically and fundamentally hydraulically as well as by manual actuation.
  • an electromagnetic flow monitor which is arranged behind the pipe separator in the pressurized water line and which switches the control valve which is in the form of an electromagnetic three-way valve and 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 push-pull 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 can 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 the one and the other
  • the piston side can be connected, the relief line branching 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 separating position shown, and the backflow preventer 9 arranged in the outlet connection 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.
  • the shut-off valve 2 is opened, as will be described in more detail below, the water pressure which builds up in front of the piston separating tube 6 causes the latter to be axially displaced.
  • the piston separating tube 6 has been sealed into the outlet connection 8 and has thus established a tight connection between the inlet and outlet, the upper end of the piston separating tube 6 slides off 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 guided axially displaceably in the cylinder 17.
  • the side 16 'of the piston facing away from the valve body 14 or the corresponding working chamber half is optionally 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 discharge funnel 12 leading relief 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 even with the slightest water withdrawal on the process water side 4, namely it acts on the solenoid valves 18, 20 in such a way that the housing bore b located above the piston 16 with the discharge line c leading to the outside while simultaneously shutting off the pressurized water supply line a is connected while the valve 20 closes the relief line f, so that the bores d and e are blocked 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 itself via the bores e and d to the piston underside 16 ", so that finally the piston 16 and the valve body 14
  • 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 pressure increase, which ensures that the flow monitor responds, which then acts on the valves 18 and 20 in a push-pull direction.
  • the cylinder housing bore e is connected to the pressurized water supply line a and the relief line c is blocked, while the electromagnetic two-way valve 20 opens, so that the piston 16 can be shut down and the shut-off valve 2 can be closed, while the open line e and f leading to the outside displaces the water from the space between the shut-off valve and the pipe separator and thus the piston separating tube 6 is given the possibility of returning to the separating position shown in FIG. 1 under the action of its compression springs.
  • FIG. 1 If the device shown in FIG. 1 is not to be adjusted electromagnetically by a flow monitor, but rather manually, the valves 18 and 20 are combined to form the manually operated slide valve shown in FIGS. 2 and 3.
  • 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 slide 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 tries to hold the slide 22 in the switching position shown in FIG. 2.
  • This switching 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 piston underside 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 designed mouth 21'd of the housing 21. It can be seen that in this position the connection a to the pressurized water supply side is blocked, whereas the bores b and c are connected to each other so that the piston top 16 'is connected to the outside atmosphere.
  • the bores d and e are blocked from the relief bore f, so that after lifting the valve body 14 pressurized water via the bores e and d to the piston bottom 16 " or can get into the associated working chamber, whereby the piston 16 effectively in its upper end position ung driven and thus the valve body 14 is fully lifted.
  • the pressurized water which initially acts on the piston separating pipe 6 and is prevented by the valve body 7 from continuing to flow pushes the piston separating pipe 6 into the outlet connection 8, whereupon the piston separating pipe 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.
  • 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 flow monitor on the service water side that is appropriately designed.
  • the valve slide 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)
  • Check Valves (AREA)
  • Magnetically Actuated Valves (AREA)
EP82104912A 1981-07-03 1982-06-04 Vorrichtung zum Schutz von Trinkwasserleitungen gegen rückfliessendes Brauchwasser Expired EP0069234B1 (de)

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
DE3126212 1981-07-03
DE19813126212 DE3126212A1 (de) 1981-07-03 1981-07-03 Vorrichtung zum schutz von trinkwasserleitungen gegen rueckfliessendes brauchwasser

Publications (2)

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

Family

ID=6135990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104912A Expired EP0069234B1 (de) 1981-07-03 1982-06-04 Vorrichtung zum Schutz von Trinkwasserleitungen gegen rückfliessendes Brauchwasser

Country Status (3)

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EP (1) EP0069234B1 (enrdf_load_html_response)
AT (1) ATE9367T1 (enrdf_load_html_response)
DE (1) DE3126212A1 (enrdf_load_html_response)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3560188D1 (en) * 1985-01-30 1987-06-25 Honeywell Braukmann Gmbh Tube disconnector
DE8508064U1 (de) * 1985-03-19 1985-04-25 Honeywell-Braukmann GmbH, 6950 Mosbach Ventilkombination
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
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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000430A1 (de) * 1980-01-08 1981-07-09 Alfred Waletzko Apparatebau, 5820 Gevelsberg Trinkwasser-durchflussarmatur mit durchflusswaechter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2747941C2 (de) * 1977-10-26 1985-02-14 Lang Apparatebau GmbH, 8227 Siegsdorf Vorrichtung zum Schutz von Trinkwasserleitungen gegen rückfließendes Brauchwasser
DE2849825C2 (de) * 1978-11-17 1984-05-10 Lang Apparatebau GmbH, 8227 Siegsdorf Trinkwasser-Durchflußarmatur mit in eine Trinkwasserversorgungsleitung eingebautem Durchflußwächter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000430A1 (de) * 1980-01-08 1981-07-09 Alfred Waletzko Apparatebau, 5820 Gevelsberg Trinkwasser-durchflussarmatur mit durchflusswaechter

Also Published As

Publication number Publication date
DE3126212A1 (de) 1983-01-20
EP0069234A1 (de) 1983-01-12
DE3126212C2 (enrdf_load_html_response) 1990-06-21
ATE9367T1 (de) 1984-09-15

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