EP0463702A1 - Hydrant mit Rückschlagventil - Google Patents

Hydrant mit Rückschlagventil Download PDF

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Publication number
EP0463702A1
EP0463702A1 EP91201621A EP91201621A EP0463702A1 EP 0463702 A1 EP0463702 A1 EP 0463702A1 EP 91201621 A EP91201621 A EP 91201621A EP 91201621 A EP91201621 A EP 91201621A EP 0463702 A1 EP0463702 A1 EP 0463702A1
Authority
EP
European Patent Office
Prior art keywords
valve
fire hydrant
standpipe
passage
check valve
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
EP91201621A
Other languages
English (en)
French (fr)
Other versions
EP0463702B1 (de
Inventor
Henricus Matheus Cornelia Van Diessen
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.)
RMI HOLLAND BV
Original Assignee
RMI HOLLAND BV
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 RMI HOLLAND BV filed Critical RMI HOLLAND BV
Publication of EP0463702A1 publication Critical patent/EP0463702A1/de
Application granted granted Critical
Publication of EP0463702B1 publication Critical patent/EP0463702B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E03B9/00—Methods or installations for drawing-off water
    • E03B9/02—Hydrants; Arrangements of valves therein; Keys for hydrants
    • E03B9/16—Devices for retaining foreign matter, e.g. sand
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B9/00—Methods or installations for drawing-off water
    • E03B9/02—Hydrants; Arrangements of valves therein; Keys for hydrants

Definitions

  • the invention relates to a fire hydrant comprising a standpipe with closable top outlet and with an underside in communication with a pressure pipe for water or the like, a valve seat arranged in the standpipe and at the underside thereof, a main valve, a valve stem carried upward through the standpipe and control means arranged above the standpipe for moving the valve stem up or down in order to release the main valve and to respectively lift from and press it against the seat.
  • Fire hydrants of the type described in the preamble are typically arranged in the ground and connect to an underground pipe system.
  • the danger that occurs here is that dirt collects in the standpipe if the fire hydrant is not used.
  • liquid from the pressure pipe system will first be pressed upward into the standpipe and compress the air in the standpipe. After the flow in the water has stopped, the dirt carried upward will sink downward and can enter the mains network via the open valve and thus pollute the water, which involves a danger to public health if this water is used as drinking water.
  • the invention has for its object to obviate the above stated drawback and provides to this end a fire hydrant which is distinguished in that a freely movable check valve is arranged and guided in the passage of the standpipe between valve seat and pressure pipe.
  • check valve Due to use of the check valve under the main valve it is possible for water to flow into the standpipe from the pressure pipe.
  • the check valve will immediately close the passage in the standpipe in pressureless or vacuum circumstances in said pressure line. When there is no flow the check valve will always fall into the closed position as a result of its own weight whereby the passage between standpipe and pressure pipe will also be closed. This prevents street dirt or other contaminants entering the pressure pipe.
  • check valve according to the invention is provided with an upper surface being parallel to the bottom of the main valve, said check valve being provided with guide pins protruding into the passage.
  • An upright guiding of the check valve is herewith ensured and resonating of the valve, which can cause water hammer pressure, is prevented.
  • the check valve is the main valve, whereas the valve stem is provided with a pressure member.
  • three guide pins are arranged which are slidable along the inner wall of the passage.
  • the main valve is covered with a jacket of elastic material.
  • the main valve can be guided in ridges or cams arranged in the standpipe in order to keep the guiding of the main valve purely axial, which contributes to better guiding of the check valve and thereby to preventing the resonance phenomenon with the "loose" check valve.
  • the invention finally proposes to connect the main valve to the valve stem or said pressure member via a universal joint.
  • the standpipe which is provided at its top end with a closable passageway 2.
  • a coupling 3 is arranged on the passageway 2 for connecting a counter coupling which is attached to a hose or the like.
  • the passageway 2 is closed off by means of a cover 4.
  • the standpipe 1 is provided on the underside with a passage 5 and a connecting flange 6 which can be fixed by means of bolts 7 onto a flange 8 of a pressure pipe (not shown) of a mains network.
  • Extending on the top of the passage 5 is an annular horizontal head end surface 9 which serves as seat for a main valve 10 to be pressed thereon.
  • the main valve 10 is coupled via a control rod or valve stem 11 to a control mechanism arranged outside the standpipe 1 at the top side adjacent to the passageway 2.
  • the control mechanism has a support 12 wherein a threaded rod 13 is rotatably mounted at 14.
  • the threaded rod 13 is provided at the top end with a coupling pin 15, whereon a bush 16 with square head can be mounted with clamping fit.
  • the threaded rod 13 co-acts with a nut 17 which is received non-rotatably in the top end of the valve stem 11.
  • the valve stem is provided at the top end 18 with an axial blind bore for receiving the bottom end of the threaded rod 13.
  • the per se known operating method of the valve stem 11 provides for lifting of the valve 10 from and the pressing thereof onto the seat 9 by setting the threaded rod 13 into rotation with a suitable hand tool. This rotation ensures an up and downward movement of the nut 17 and therefore of the valve stem 11 with the main valve 10 coupled thereto.
  • the standpipe 1 can be filled with water from the mains network on the underside of the flange 8 by lifting the valve 10, and otherwise closed off therefrom by replacing the valve 10 on the seat 9. Any water present in the standpipe 1 can be discharged via a dewatering opening 19, so that no danger of freezing can occur. It is noted that when the valve 10 is lifted the dewatering opening 19 is enclosed by the side thereof, see fig. 3, 4, so that when the fire hydrant is used there are no losses due to leakage.
  • check valve 20 Arranged according to the invention under the main valve 10 is a check valve 20 which is embodied here as a disc-shaped body with three of four guide pins 21 along the periphery on the bottom surface thereof. These guide pins lie flat against the inner wall of the passage 5.
  • the peripheral edge of the disc-shaped check valve 20 widens towards the top, in other words, is slightly conical and connects to an annular, upwardly widening surface of the passage 5, which surface connects to the head end surface 9 which serves as seat for the main valve 10.
  • Recessed into the peripheral surface 22 of the check valve 20 is a groove wherein an O-ring 23 is received. This O-ring rests in the position according to fig. 1 against the annular surface of the passage 5.
  • the main valve 10 consists of a core of rigid material that is covered with a jacket of elastic material 25. It is noted that the core of the main valve is embodied on the underside with an outwardly protruding radial flange 26 which protrudes over the seat 9.
  • the core initially extends in a cylindrical part which extends upward over a determined height such that in co-action with the adjacent jacket 25 the opening of the discharge channel 19 debouching into the standpipe 1 is closed off if the valve lies in the position according to fig. 3, 4.
  • the core extends further in a frusto-conical portion wherein a blind bore 27 is received.
  • the blind bore has at a determined height above the bottom thereof an annular channel 28 that serves to receive an annular ring 29.
  • the valve stem 11 is provided on the underside with a narrowed portion 30 likewise provided with an annular channel 31 wherein the annular ring 29 fits.
  • the bottom end of the narrowed portion 30 is rounded off and can press on the bottom of the blind bore 27 when the valve stem is mounted in the valve 10 as shown in fig. 1.
  • the covering of elastic material 25 can be provided on the shoulder between the transition of the valve stem to the narrowed portion 30 with an integrally moulded O-ring 32 in order to seal the blind bore 27 against the water standing in the standpipe 1.
  • this O-ring 32 also functions to orient the valve body 10 axially relative to the centre line of the valve stem 11.
  • ridges 33 are cast on the inside of the standpipe 1, the contact surface of these ridges with the valve 10 being machined.
  • the ridges 33 are arranged as shown in a widened part of the standpipe 1, necessary to realize sufficient passage for the water to be carried through.
  • the bottom surface of the valve 10, in particular the covering 25, has an annular ridge 35, which co-acts with an annular groove 36 recessed in the upper surface of the check valve 20.
  • Said ridge and groove act like centering means in order to retain the free-movable check valve in the center of the main valve.
  • Other embodiments are possible.
  • the user can raise the main valve 10 by turning the threaded rod 13 in the correct direction, whereby the valve stem 11 is moved upward taking with it the valve 10. If there is pressure in the mains network on the underside of the check valve 20, this valve is immediately moved upward and, if there is sufficient pressure, will remain lying against the main valve 10.
  • the water flow is such that all the dirt which could possibly have collected in the standpipe 1 can be carried along with the water flow via the outlet opening 2 of the standpipe 1. This position is shown in fig. 4.
  • the fire hydrant can be closed again by carrying the valve stem 11 downward by turning the threaded rod 13 in opposing direction, whereby the main valve 10 is pressed with its bottom surface onto the top surface of the check valve 20 until the edge of the main valve rests on the seat 9.
  • the guiding of the main valve 10 is ensured because of the ridges 33 so that the bottom surface remains precisely parallel to the top surface of the check valve 20.
  • valve stem 11 Owing to the universal joint between valve stem 11 and valve body 10 a setting of the valve on the seat is possible without problem. It is further noted here that the pressure force of the valve stem 11 can be transmitted directly onto the valve body 10 by the contact between the bottom end of the valve stem and the bottom of the blind bore in the valve.
  • Fig. 5 shows an alternative embodiment of the valve guiding for the check valve 20.
  • the valve body thereof is embodied for this purpose with a central pin 40 which is received in a bush 41 which is connected to the wall of the passage 5 via radially directed arms 42.
  • the pin 40 can therefore ensure an upright guiding of the check valve 20 in accordance with the pins 21 of the foregoing embodiment.
  • Fig. 6 shows an alternative embodiment of the check valve 25. This one is actually the main valve.
  • the sealing is obtained by means of a O-ring being in the upper surface of the passage 5.
  • the valve stem is provided with a pressure member 47, which urges the peripheral zone 48 of the main check valve 45 downwardly against the O-ring. In lifting the pressure member 47 the main check valve 45 will be released. Acting as check valve the valve body will immediately fall down on the upper surface when the fluid flow is nill or under pressure in the pressure line is existing, owing to the guiding, here formed by a pin 40 and bush 41, in the passage 5.
  • valve body Acting as a main valve the valve body will be pressed down upon the upper surface by means of the pressure member.
  • De centering of the valve body with respect to the pressure member 47 is here obtained by means of a number of ridges 49, which will come into contact with the lower conical surface of the pressure member.
  • the invention is not limited to the embodiment described above.

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)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Lift Valve (AREA)
  • Details Of Valves (AREA)
EP19910201621 1990-06-22 1991-06-24 Hydrant mit Rückschlagventil Expired - Lifetime EP0463702B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9001434A NL9001434A (nl) 1990-06-22 1990-06-22 Brandkraan met terugslagklep.
NL9001434 1990-06-22

Publications (2)

Publication Number Publication Date
EP0463702A1 true EP0463702A1 (de) 1992-01-02
EP0463702B1 EP0463702B1 (de) 1994-09-28

Family

ID=19857299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910201621 Expired - Lifetime EP0463702B1 (de) 1990-06-22 1991-06-24 Hydrant mit Rückschlagventil

Country Status (3)

Country Link
EP (1) EP0463702B1 (de)
DE (1) DE69104275T2 (de)
NL (1) NL9001434A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6868860B2 (en) 2002-12-04 2005-03-22 Davidson Hydrant Technologies, Inc. Fire hydrant with second valve
US7240688B2 (en) 2002-12-04 2007-07-10 Davidson Hydrant Technologies, Inc. Retrofitting a fire hydrant with secondary valve
US7278442B2 (en) 2004-09-01 2007-10-09 Darryll Arthur Douglas Holland Vented port-cap for fire hydrant
US7428910B2 (en) 2002-12-04 2008-09-30 Davidson Hydrant Technologies, Inc. Breathable fire hydrant rod
US7575017B2 (en) 2006-10-06 2009-08-18 Davidson Hydrant Technologies, Inc. Wet barrel fire hydrant system with second valve
CH700378A1 (de) * 2009-02-11 2010-08-13 E Hawle Armaturenwerke Gmbh Ventil für einen Hydranten.
US7775231B2 (en) 2002-12-04 2010-08-17 Davidson Hydrant Technologies, Inc. Retrofitting a fire hydrant with a replacement hydrant body containing a secondary valve
CN102587456A (zh) * 2012-03-26 2012-07-18 华东交通大学 两级调压多功能型室外消火栓
EP3470586A1 (de) * 2017-10-16 2019-04-17 vonRoll infratec (investment) ag Absperrorgan eines hydranten, hydrant und hauptventilsitz

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008014423B4 (de) 2008-03-14 2011-03-17 Avk Mittelmann Armaturen Gmbh Hydrant

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE468926C (de) * 1928-11-26 Joseph Menge Mit einem Abschluss- und Rueckschlagventil ausgeruestete Abtrittspuelvorrichtung mit Windkessel
US2515770A (en) * 1947-05-17 1950-07-18 Gronberg John Henric Paulus Fire hydrant
US3035609A (en) * 1958-01-02 1962-05-22 Phillips Petroleum Co Fluid handling structure
US3043329A (en) * 1959-04-24 1962-07-10 Wendell Coffee Irrigation valve
FR2237016A1 (en) * 1973-07-09 1975-02-07 Pont A Mousson Automatic water sprinkler unit - is for horticultural purposes having a non return valve to catch debris
EP0113913A1 (de) * 1982-12-24 1984-07-25 Bopp & Reuther Aktiengesellschaft Unter- oder Überflurhydrant
US4489746A (en) * 1982-05-28 1984-12-25 Mueller Co. Backflow preventer apparatus
DE3435778A1 (de) * 1984-09-28 1986-04-10 Mittelmann & Co Armaturenwerk, 5603 Wülfrath Hydrant, insbesondere unterflurhydrant

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE468926C (de) * 1928-11-26 Joseph Menge Mit einem Abschluss- und Rueckschlagventil ausgeruestete Abtrittspuelvorrichtung mit Windkessel
US2515770A (en) * 1947-05-17 1950-07-18 Gronberg John Henric Paulus Fire hydrant
US3035609A (en) * 1958-01-02 1962-05-22 Phillips Petroleum Co Fluid handling structure
US3043329A (en) * 1959-04-24 1962-07-10 Wendell Coffee Irrigation valve
FR2237016A1 (en) * 1973-07-09 1975-02-07 Pont A Mousson Automatic water sprinkler unit - is for horticultural purposes having a non return valve to catch debris
US4489746A (en) * 1982-05-28 1984-12-25 Mueller Co. Backflow preventer apparatus
EP0113913A1 (de) * 1982-12-24 1984-07-25 Bopp & Reuther Aktiengesellschaft Unter- oder Überflurhydrant
DE3435778A1 (de) * 1984-09-28 1986-04-10 Mittelmann & Co Armaturenwerk, 5603 Wülfrath Hydrant, insbesondere unterflurhydrant

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7775231B2 (en) 2002-12-04 2010-08-17 Davidson Hydrant Technologies, Inc. Retrofitting a fire hydrant with a replacement hydrant body containing a secondary valve
US7055544B2 (en) 2002-12-04 2006-06-06 Davidson Hydrant Technologies, Inc. Fire hydrant with a second valve
US7174911B2 (en) 2002-12-04 2007-02-13 Davidson Hydrant Technologies, Inc. Fire hydrant with second valve
US7240688B2 (en) 2002-12-04 2007-07-10 Davidson Hydrant Technologies, Inc. Retrofitting a fire hydrant with secondary valve
US7428910B2 (en) 2002-12-04 2008-09-30 Davidson Hydrant Technologies, Inc. Breathable fire hydrant rod
US6868860B2 (en) 2002-12-04 2005-03-22 Davidson Hydrant Technologies, Inc. Fire hydrant with second valve
US7278442B2 (en) 2004-09-01 2007-10-09 Darryll Arthur Douglas Holland Vented port-cap for fire hydrant
US7575017B2 (en) 2006-10-06 2009-08-18 Davidson Hydrant Technologies, Inc. Wet barrel fire hydrant system with second valve
CH700378A1 (de) * 2009-02-11 2010-08-13 E Hawle Armaturenwerke Gmbh Ventil für einen Hydranten.
CN102587456A (zh) * 2012-03-26 2012-07-18 华东交通大学 两级调压多功能型室外消火栓
EP3470586A1 (de) * 2017-10-16 2019-04-17 vonRoll infratec (investment) ag Absperrorgan eines hydranten, hydrant und hauptventilsitz
WO2019076590A1 (de) * 2017-10-16 2019-04-25 Vonroll Infratec (Investment) Ag Absperrorgan eines hydranten, hydrant und hauptventilsitz
RU2742834C1 (ru) * 2017-10-16 2021-02-11 Фонролл Инфратек (Инвестмент) Аг Запорный орган гидранта, гидрант и седло основного клапана
EP3470586B1 (de) 2017-10-16 2021-05-12 vonRoll infratec (investment) ag Absperrorgan zur verwendung in einem hydranten, hydrant und hauptventilsitz

Also Published As

Publication number Publication date
NL9001434A (nl) 1992-01-16
DE69104275T2 (de) 1995-02-16
DE69104275D1 (de) 1994-11-03
EP0463702B1 (de) 1994-09-28

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