WO1996006308A1 - Vanne - Google Patents

Vanne Download PDF

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Publication number
WO1996006308A1
WO1996006308A1 PCT/GB1995/001993 GB9501993W WO9606308A1 WO 1996006308 A1 WO1996006308 A1 WO 1996006308A1 GB 9501993 W GB9501993 W GB 9501993W WO 9606308 A1 WO9606308 A1 WO 9606308A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
fluid
inlet
piston
valve according
Prior art date
Application number
PCT/GB1995/001993
Other languages
English (en)
Inventor
Graham Downey
Paul Richard Ali
Original Assignee
Euro Innovations Limited
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
Priority claimed from GB9416992A external-priority patent/GB9416992D0/en
Application filed by Euro Innovations Limited filed Critical Euro Innovations Limited
Priority to AU32635/95A priority Critical patent/AU3263595A/en
Publication of WO1996006308A1 publication Critical patent/WO1996006308A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1083—Filling valves or arrangements for filling

Definitions

  • the present invention relates to valves and more particularly, though not exclusively, to valves suitable for use in domestic boiler water circuits.
  • Contamination of the tap circuit by water from the radiator circuit can result in discolouration or perhaps the spread of diseases.
  • a valve comprising an inlet and an outlet and a path of fluid communication between the inlet and outlet, means for selectively allowing fluid to flow along the path of fluid communication and means for preventing fluid from flowing along the path of fluid communication, and an opening from the valve to atmosphere, whereby when fluid is prevented from flowing along the path of fluid communication an atmosphere gap is created between the inlet and the outlet and when fluid is prevented from flowing along the path of fluid communication neither the inlet nor the outlet is in fluid communication with the opening to atmosphere.
  • the term "atmosphere” means the ambient atmosphere around the valve. By creating in a "closed” configuration (no fluid flow) of the valve an atmosphere gap between the inlet and the outlet, they are effectively disconnected.
  • the valve is adapted such that the gap between the inlet and outlet drains substantially completely of liquid in at least one orientation with the valve in its closed configuration.
  • the valve is biased towards the position in which fluid is prevented from flowing along the path of fluid communication between the inlet and the outlet.
  • the valve comprises a piston through which water flows from the inlet towards the outlet.
  • the piston moves to generate the atmosphere gap.
  • the means for selectively allowing fluid to flow may comprise a piston in a tube, the piston comprising the path of fluid communication between the inlet and the outlet, the piston comprising an entry port and an exit port in fluid communication with the inlet and outlet only in an "open” configuration and an opening in the piston which in a "closed” configuration is open to atmosphere.
  • the piston is biassed towards its "closed” configuration in which fluid is prevented from flowing.
  • a non-return valve is provided between the inlet and the outlet.
  • means are provided for biassing the non-return valve to is closed position.
  • the non-return valve is located in the piston.
  • the means for selectively allowing fluid to flow comprises a sealing means biassed towards a sealing position, which sealing means can be moved to a position in which fluid can flow.
  • movement of the sealing means to the position in which fluid can flow is caused by movement of the piston.
  • the second sealing means is biassed towards a position in which fluid cannot flow.
  • the fluid will be a liquid, usually water.
  • the movement of the valve between the fluid flow and the fluid flow prevention positions can be manually controlled.
  • a fail-safe mechanism is provided to prevent movement of the piston when the inlet is not under pressure.
  • the fail-safe mechanism comprises a one-way valve coupled to an insert within a shaped slot.
  • valve is suitable for use with a pressurised water system.
  • system is a heating system.
  • means are provided for moving the valve between its open and closed configurations and control means for operating the moving means.
  • a solenoid a motor or a main pressure pilot system, operable to operate the valve.
  • valve suitable for use with a combination boiler according to any one or more of the preceding paragraphs.
  • the invention includes a combination boiler incorporating a valve according to the preceding paragraph.
  • a boiler comprising means to supply water to a water circuit and a pressure monitor, whereby when the pressure in the water circuit falls below a predetermined amount, water is supplied to the water circuit.
  • the boiler is a domestic boiler.
  • the water circuit is a heating circuit.
  • the means to supply water comprises a valve according to any preceding paragraph.
  • valve according to and as part of the present invention is significantly easier to operate than prior apparatus for use with filling loops and, in particular does not require a skilled operator.
  • Figure 1 is a schematic water circuit diagram including a valve according to the present invention.
  • Figure 2 is a schematic illustration of a valve in accordance with the present invention.
  • Figure 3 is an enlarged partly sectional illustration of part of the valve shown in Figure 2 in a "closed" configuration.
  • Figure 4 is a view of the valve shown in Figure 3 in an "open" configura ion.
  • Figure 5 is an enlarged sectional view of a valve of a second embodiment of the present invention in an "open" configuration.
  • Figure 6 is a view of the valve shown in Figure 5 in a "closed" configura ion.
  • Figure 7 is an enlarged schematic sectional view of an arrangement that can be used in conjunction with the present invention.
  • Figure 8 is an enlarged schematic illustration of the slot shown in Figure 7.
  • Figure 9 is a cross-sectional illustration of a third embodiment of the present invention in its "closed" configuration.
  • Figure 10 is an end elevation of the valve shown in Figure 9.
  • Figure 11 is a plan view of the piston body of the valve shown in Figures 9 and 10.
  • Figure 12 is a cross-sectional illustration of the third embodiment of the present invention in its "open" configuration.
  • Figure 13 is a schematic perspective illustration of a fourth embodiment of the present invention.
  • Figure 14 is a cross-sectional illustration of the fourth embodiment of the present invention in a "closed" configuration.
  • Figure 15 is a cross-sectional end elevation of the valve shown in Figures 13 and 14.
  • a cold water source typically at 90 pounds per square inch, coupled by a flexible hose 3 to an input line 5 to a boiler 7.
  • the boiler will typically operate at 30 pounds per square inch.
  • a valve 6 in accordance with the present invention.
  • valve 6 Between the inlet 2 and outlet 4 is the valve 6.
  • the valve 6 comprises an open-ended generally hollow cylindrical outer tube 8 having two cut away portions 9.
  • the first piston 10 comprises a generally cylindrical body 14 through which there is a bore 16 from an entry port 42 to a chamber 25.
  • the piston 10 can slide within the tube 8, but is sealed against fluid flow by two O-rings 18. Between the body 14 and the tube 8 is an annular gap 19 bounded by the body 14, tube 8 and O-rings 18.
  • the body 14 of the piston 10 comprises a cylindrical first hollow portion 20 and a cylindrical second hollow portion 22 of reduced diameter relative to the first portion 20.
  • the first portion 20 extends outwardly from the end of the tube 8 to form a button 24 ( Figure 2) .
  • a circular sealing washer 26 mounted on a cylindrical rod 28 on the longitudinal axis of the tube 8 such that there extends from one side of the washer 26 a spigot 30 through a hole
  • a limiting bolt 38 Projecting through the tube 8 is a limiting bolt 38 which projects into a groove 40 in the piston 10.
  • the bore 16 extends from its port 42 through the first portion 20 of the piston 10 to the hollow interior of the reduced diameter second portion 22 forming a path of fluid communication therebetween.
  • water cannot pass beyond the second portion 22 because the washer 26 seals the only exit.
  • a second sealing washer 50 Adjacent to and spaced from the piston 10, on the other side of the cut away portions 9, is a second sealing washer 50 also mounted on a cylindrical rod 52 substantially on the longitudinal axis of the tube 8. On the rod 52 is a biasing spring 54 which acts against a plate 56 at the washer end of the rod 52 and against a reaction plate 58 at the other end. The rod 52 in this case ends at the surface of the washer 50.
  • the washer 50 can seal chamber 60 against sealing plate 62 in which there is a circular hole having a diameter greater than the diameter of the cylindrical rod 52. From the chamber 60, there is a bore 64 to the outlet 4.
  • the chamber 60 is formed in a block 66 within the tube 8, the block 66 having a cylindrical recessed portion 68 defined by shoulders 70.
  • the washer 26 can move against the bias of spring 32 within the chamber 25 in a direction substantially parallel to the longitudinal axis of the tube 8.
  • the washer 50 can move within its chamber 60 against spring 54 in the same direction.
  • water can flow from the inlet 2 through the bore 16 to the chamber 25.
  • the reaction plate 34 has an internal diameter greater than the external diameter of the rod 28 allowing the water to flow into the chamber 25.
  • the plate 34 can include a plurality of holes therethrough. Water cannot escape from the chamber 25 because the spring 32 biases the washer 26 against the end of the second portion 22. The sealing of the washer 26 is enhanced by the water pressure. Water can also flow around the annular gap 19, but cannot pass the O-rings 18.
  • the valve 6 can be moved from its "closed” configuration shown in Figure 2 to its "open” configuration shown in Figure 3 by depression of the button 24.
  • the springs 32, 54 are balanced such that as the rod 28 is driven towards the rod 52, the two washers 26, 50 are forced away from their sealing surfaces which, in the case of the washer 26 is the end of the second portion 22 and, in the case of the washer 50, is the sealing plate 62.
  • water can flow from the inlet 2 through the bore 16 into the chamber 25, passed the washer 26 (which has been forced away from the end 33 of the second portion 22) . Since the recessed portion 68 has been sealed by O-ring 39, the water can only pass into the chamber 60 (to which access can now be gained as the washer 50 has been forced back away from plate 62 by the rod 28) . Water flows from the chamber 60 through bore 64 to the outlet 4. Accordingly, in the "open” configuration water can flow from the inlet 2 to the outlet 4.
  • entry port 42 can be replaced by a slot in the piston 10.
  • a valve 100 comprising a cylindrical outer tube 102 in which there is located an opening 104 to atmosphere.
  • a hollow piston 106 (the interior of which is marked by dashed lines in Figures 5 and 6) . Access to the interior of the piston 106 can be gained through entry port 108 and exit port 110.
  • the piston 106 includes an opening 112. On either side of the entry port 108 are O-rings 114. On either side of the opening 112 are O-rings 116. On either side of the exit port 110 are O-rings 118. Also provided is O-ring 120 intermediate the O-rings 114 and 116.
  • water can flow from inlet 122 to outlet 124 via the piston 106 as explained below.
  • Water enters into the inlet 122 and enters the interior of the piston 106 via entry port 108.
  • the water flows through the interior of the piston 106 to egress through exit port 110 out through outlet 124.
  • O-rings 114 and 118 In this position, water is constrained to follow this route by the presence of O-rings 114 and 118.
  • the O-rings 116 on either side of the opening 112 prevent water from flowing out of the opening 112.
  • a biassing spring 126 and the end of the tube 102 forces the piston 106 towards its "closed” configuration shown in Figure 6.
  • the entry port 108 and exit port 110 are misaligned from the inlet 122 and outlet 124 respectively. Therefore, water from the inlet 122 can enter the tube 102, but cannot pass the O-rings 114 and 120. Similarly, water from the outlet 124 cannot pass 0- rings 114.
  • the openings 104 (and the but 102) and 112 (and the piston 106) are, in this configuration, aligned allowing water between the inlet and the outlet to drain from the valve 100 thus creating an atmosphere gap between the inlet and the outlet as required.
  • the O-ring 120 prevents water passing from the inlet 122 through the opening 104.
  • the piston 106 can be moved by button 128 projecting from the end of tube 108.
  • This second embodiment of the present invention has the advantage of simplicity and ease of manufacture.
  • the atmosphere gap provided by opening 104 can be connected to the pressure relief valve (not shown) in the boiler allowing the water to be expelled conveniently.
  • a cold water inlet 150 within which there is a one way valve 152 having a stem 154 connected to a disc 156.
  • the cold water inlet 150 is coupled to a valve 158 of the type described to above in relation to the first and second embodiments of the present invention.
  • piston 160 includes a slot 162 into which the disc 156 projects.
  • the valve 152 is sprung biassed by a spring (not shown) towards its closed position.
  • the slot 162 in the piston 160 is shown in more detail.
  • the slot comprises an outer layer having an elongate portion 164 connected to a circular portion 166 underneath which there is an elongate elliptical slot (shown by dashed lines 168) having a width substantially similar to that of the diameter of the circular portion 166.
  • the one way valve 152 When the water inlet 150 is under pressure, the one way valve 152 is opened forcing the disc 156 upwardly towards the piston 160 into the elongate elliptical part of the slot 162. In this position the piston can move freely as described above in relation to the first and second embodiments, the disc 156 moving along the elongate elliptical portion 168 of the slot 162, the stem 154 moving along the elongate portion 164.
  • the one way valve 152 closes lowering the disc 156 so that it lies substantially within the circular portion 166 of slot 162. In this position the piston 160 cannot be moved because the disc 156 is trapped within the circular portion 166 as shown in Figure 7.
  • FIG. 9 there is shown a third embodiment of the present invention in a closed configuration.
  • valve 202 suitable for coupling to a domestic cold water supply in-line with a combination boiler.
  • the valve 202 has a water inlet 204 and a water outlet 206.
  • the valve 202 comprises an open-ended generally hollow cylindrical outer tube 208 from which depends a vent tube 210.
  • a vent tube 210 In the tube 208, opposite the vent tube 210 is a cutaway vent slot 212 which extends around nearly half of the tube 208.
  • a piston 214 is slidable within the tube 208.
  • the piston 214 comprises a generally cylindrical body 216 through which there is a generally L-shaped bore 218, one end of which, in the open configuration (see Figure 12) , lies over the inlet 204.
  • the other end of bore 218 opens into an internal chamber 220 within which is mounted a non ⁇ return valve 222.
  • Adjacent the chamber 220 is an annular circumferential groove 224, which groove 224 is in fluid communication with bore 218 by hole 225 ( Figure 11) .
  • Two circular outlets 226 are provided from chamber 220 to outlet 206.
  • O-rings 228-238 are provided in annular grooves along the exterior of the piston 214.
  • O-rings 228 and 230 are located on either side of the opening of the bore 218.
  • O- rings 232 and 234 lie intermediate O-ring 230 and the annular groove 224.
  • O-rings 236 and 238 are located on either side of the outlets 226.
  • a reduced diameter portion 240 At the end of the piston 214 distant from chamber 220 is a reduced diameter portion 240 forming offset shoulders 242, 244.
  • the reduced diameter portion 240 includes a bore 246.
  • a flange 248 projects from the reduced diameter portion 240 to form a shoulder 250 opposing shoulder 244.
  • the internal chamber 220 has an enlarged diameter portion 252 forming an annular shoulder 254 for mounting and locating the non-return valve 222 as shown in Figure 10.
  • the non-return valve 222 comprises a plug 256 seated by O-ring 258 in a plug receiving narrowing portion of chamber 220.
  • a plunger 260 extends from the plug 256.
  • the mounting member 262 for the non-return valve 222 is generally T-shaped in cross-section with a leg 264 comprising a hollow circular cylindrical tube extending to a circular (in end elevation) head 266 which engages in the enlarged diameter portion 252 of chamber 220.
  • the plunger 260 extends into leg 264.
  • the plunger 260 is biassed towards its closed configuration (shown in Figure 9) by helical spring 268.
  • a rod 270 journaled in the piston 214 From the other end of the piston 214 extends a rod 270 journaled in the piston 214.
  • the rod 270 extends out of the tube 208 through a closure plate 271.
  • a button 272 is attached to the end of the rod 270 projecting from tube 208 by means of a screw 274 and washer 276.
  • a lock nut 278 lies between the closure plate 271 and button 272.
  • a helical spring 280 which biasses the button 272 away from the tube 208.
  • a screw 282 projects through the tube 208 adjacent the closure plate 271.
  • the button 272 is biassed outwardly by spring 280 towards its closed configuration, and its travel in that direction is limited by shoulder 244 abutting screw 282.
  • valve 202 is shown in its open configuration, but with the non-return valve 222 still engaged.
  • the valve 202 is transferred from its closed configuration
  • the valve can be made to move to its closed configuratio (ie the button retracts) at an outlet pressure of about 1.5 bar.
  • the non-return closes as the water pressure from the inlet is shut off as the valve moves to its closed configuration.
  • the system therefore, automatically shuts off the water supply when the heating system to be filled is full.
  • the piston 214 end size and spring 280 strength can be varied to achieve different pressure cut-offs. (The second embodiment of the present invention, described above, can operate in a similar fashion) .
  • inlet 204 and bore 218 In the open configuration the junction between inlet 204 and bore 218 is sealed by O-rings 228 and 230. Water can flow into groove 224 through hole 225, but is sealed from further egress by O-rings 234 and 236.
  • the bore 218 ceases to be aligned with inlet 204 stopping the flow of water therethrough.
  • water in the bore 21'8 can drain therethrough to ensure an air gap develops between the inlet 204 and outlet 206. Residual pressure in the water in the bore 218 can cause it to spray out from the vents 210, 212.
  • the button 272 can be screwed inwardly to tension the spring 280 thus allowing the pressure at which the valve 202 switches itself off to be adjusted.
  • a fourth embodiment of the present invention is shown in which a substantial 20mm air gap is obtained between the inlet and outlet.
  • the fourth embodiment is similar to the third so it will only be described briefly.
  • the fourth embodiment there is a two part piston 302, 304 connected by an intermediate rod 306 about which there is a plastic ring 308.
  • two drain holes 310 are provided from the interior to the exterior of the piston part 302.
  • An '0' -ring 312 fitted inside first outer body 314 prevents leakage from the holes 310 in the 'closed' configuration shown.
  • button 316 is depressed and holes 310 are forced across to the second outer body 318 after which the inlet 320 of first piston part 302 aligns with supply inlet 322 to transfer fluid across the air gap 324.
  • an optional drip tray 326 is also shown in Figure 13.
  • each embodiment of the present invention will drain liquid from the air gap between inlet and outlet.
  • a gauze filter may be provided on the inlet and outlet to protect, in particular the O-rings from contaminants.
  • the valve of the present invention may, in effect, be automated by providing a pressure sensor in the water boiler 7 coupled to the valve 6. When the water pressure in the boiler 7 falls below a predetermined setting the valve 6 can be opened to supply water until a desired pressure is achieved.
  • the valve 6 can be activated by a solenoid instead of a button for automation.
  • valves of the embodiments described herein can be used as a retro-fit accessory or be installed as a built-in component in a combi-boiler. It will be appreciated that various features of the first to fourth embodiments may be combined and/or substituted.
  • a non-return valve can be located prior to the valve described herein in the water system.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

La présente invention concerne une vanne (6, 100) caractérisée par une entrée (42, 108), une sortie (100) et une voie de passage assurant la communication de fluide entre l'entrée et la sortie. Cette vanne comporte un organe autorisant l'écoulement sélectif du fluide par la voie de passage, un organe bloquant l'écoulement du fluide par la voie de passage, et un orifice (9, 104) de mise à l'atmosphère de la vanne. Lorsque l'écoulement du fluide par la voie de passage est bloqué, une bulle atmosphérique se crée entre l'entrée et la sortie.
PCT/GB1995/001993 1994-08-23 1995-08-22 Vanne WO1996006308A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU32635/95A AU3263595A (en) 1994-08-23 1995-08-22 A valve

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9416992A GB9416992D0 (en) 1994-08-23 1994-08-23 A valve
GB9416992.7 1994-08-23
GBGB9509665.7A GB9509665D0 (en) 1994-08-23 1995-05-12 A valve
GB9509665.7 1995-05-12

Publications (1)

Publication Number Publication Date
WO1996006308A1 true WO1996006308A1 (fr) 1996-02-29

Family

ID=26305502

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1995/001993 WO1996006308A1 (fr) 1994-08-23 1995-08-22 Vanne

Country Status (2)

Country Link
AU (1) AU3263595A (fr)
WO (1) WO1996006308A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0801272A2 (fr) * 1996-04-12 1997-10-15 Joh. Vaillant GmbH u. Co. Dispositif de remplissage pour chauffe-eau
WO1997045680A1 (fr) 1996-05-25 1997-12-04 Euro Innovations Limited Ameliorations relatives a un clapet
GB2514637A (en) * 2013-05-29 2014-12-03 Alco Corp Water filling device with air gap forming unit
GB2527621A (en) * 2014-06-25 2015-12-30 Christopher Jepp A filling device for a pressurised heating circuit
WO2016092279A1 (fr) * 2014-12-08 2016-06-16 Christopher Jepp Dispositif de remplissage pour circuit de chauffage sous pression
IT201900006475A1 (it) 2019-05-02 2020-11-02 Andrea Rigamonti Dispositivo di riempimento

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182058A1 (fr) * 1984-10-25 1986-05-28 Comap Robinet à dispositif anti-retour pour le remplissage d'une enceinte fermée
DE3826034A1 (de) * 1988-07-30 1990-02-01 Lang Apparatebau Gmbh Rueckflussverhinderer fuer fluessigkeits-druckleitungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182058A1 (fr) * 1984-10-25 1986-05-28 Comap Robinet à dispositif anti-retour pour le remplissage d'une enceinte fermée
DE3826034A1 (de) * 1988-07-30 1990-02-01 Lang Apparatebau Gmbh Rueckflussverhinderer fuer fluessigkeits-druckleitungen

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0801272A2 (fr) * 1996-04-12 1997-10-15 Joh. Vaillant GmbH u. Co. Dispositif de remplissage pour chauffe-eau
EP0801272A3 (fr) * 1996-04-12 1998-10-14 Joh. Vaillant GmbH u. Co. Dispositif de remplissage pour chauffe-eau
WO1997045680A1 (fr) 1996-05-25 1997-12-04 Euro Innovations Limited Ameliorations relatives a un clapet
GB2514637A (en) * 2013-05-29 2014-12-03 Alco Corp Water filling device with air gap forming unit
GB2514637B (en) * 2013-05-29 2016-03-09 Alco Corp Water filling device with air gap forming unit
GB2527621A (en) * 2014-06-25 2015-12-30 Christopher Jepp A filling device for a pressurised heating circuit
GB2527621B (en) * 2014-06-25 2017-04-19 Jepp Christopher A filling loop device for a pressurised heating circuit
WO2016092279A1 (fr) * 2014-12-08 2016-06-16 Christopher Jepp Dispositif de remplissage pour circuit de chauffage sous pression
US10883644B2 (en) 2014-12-08 2021-01-05 Christopher Jepp Filling device for a pressurised heating circuit
IT201900006475A1 (it) 2019-05-02 2020-11-02 Andrea Rigamonti Dispositivo di riempimento

Also Published As

Publication number Publication date
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