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WO2025133289A1 - Système de réduction de pression de conduite maîtresse et procédé de régulation de pression dans des réseaux d'eau - Google Patents

Système de réduction de pression de conduite maîtresse et procédé de régulation de pression dans des réseaux d'eau Download PDF

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Publication number
WO2025133289A1
WO2025133289A1 PCT/EP2024/088158 EP2024088158W WO2025133289A1 WO 2025133289 A1 WO2025133289 A1 WO 2025133289A1 EP 2024088158 W EP2024088158 W EP 2024088158W WO 2025133289 A1 WO2025133289 A1 WO 2025133289A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
flow
water
pressure reducing
reducing 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.)
Pending
Application number
PCT/EP2024/088158
Other languages
English (en)
Inventor
David Brian Taylor
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.)
Polymer Technologies Ltd
Original Assignee
Polymer Technologies Ltd
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 Polymer Technologies Ltd filed Critical Polymer Technologies Ltd
Publication of WO2025133289A1 publication Critical patent/WO2025133289A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/202—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means actuated by an electric motor
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/02—Public or like main pipe systems
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/075—Arrangement of devices for control of pressure or flow rate
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
    • G05D16/206—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged for the control of a plurality of diverging pressures from a single pressure
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/003—Arrangement for testing of watertightness of water supply conduits
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/072—Arrangement of flowmeters

Definitions

  • DMAs Local area networks
  • DMAs may typically comprise approximately 800 - 1500 properties/users and therefore the PRV controls the flow of water to these properties/users.
  • WO 2021/089986 and WO 2022/233420 describe improved pressure reducing valves where the valve is biased to a closed position by a spring.
  • the compression in the spring is adjusted by a controllable motor device which in turn adjusts the pressure of fluid exiting the valve.
  • WO 03/057998 describes spring-biased secondary pilot valves for use in PRV’s controlling water pressures in local area networks (for example pilot control valves and differential control valves).
  • An object of the present invention is to provide an improved flow-controlled pressure reducing valve which overcomes and alleviates the problems in known pressure reducing valves that have been described above.
  • a pressure reducing valve comprising:
  • valve body having an interior comprising a fluid-flow chamber through which fluid can pass
  • valve element which is moveable between a closed position, in which the valve element prevents fluid from passing through the chamber, and one or more open positions wherein fluid may flow from the inlet, through the chamber, and out through the outlet, and
  • a substantially incompressible connector connected at a first end to the valve element and at a second end to a controllable motor drive for moving the valve element.
  • the pressure reducing valve may form part of a flow-controlled pressure reducing valve system (FCPRVS), which, in addition to the PRV itself, may comprise one or more of the following components, as described in further detail below:
  • the invention may therefore provide a Supervisory Control and Data Acquisition (SCADA) system that is a computer-based system that monitors and controls the PRVs described herein to provide real-time control of water main pressure reducing valves and systems.
  • SCADA Supervisory Control and Data Acquisition
  • the inlet and outlet of the chamber typically take the form of or comprise one or more orifices (the “inlet orifice(s)” and the “outlet orifice(s)”).
  • the term orifice refers to openings which are in fluid communication with the chamber and receive fluid from an upstream input source of the valve or direct fluid to the downstream water or fluid supply distribution network.
  • the valve element may be a covering element which covers the inlet orifice.
  • the valve element may be a blocking element, which blocks the inlet orifice.
  • the valve element restricts or prevents some or all fluid from entering the chamber at all by preventing fluid from passing through the inlet orifice.
  • the valve element may restrict or prevent fluid from passing through the chamber by covering or blocking the outlet orifice.
  • the valve element may take the form of a plate which covers or obscures the inlet or outlet of the chamber to prevent or restrict the flow of fluid through the chamber.
  • the valve element may take the form of an obturator which is inserted into the inlet or outlet orifice to prevent or restrict fluid flow through the chamber.
  • the valve element is moveable between a closed position and one or more open positions.
  • the one or more open positions typically restrict flow to a differing extent to thereby control the pressure of the water at the outlet of the pressure reducing valve.
  • the one or more open positions may differ by the distance between the valve element and the orifice.
  • One of the one or more open positions is a “fully” open position where flow of water through the orifice is not reduced (at least to any significant extent) by the presence of the valve element.
  • the valve element may be moveable between an open position and a closed position in a number of discrete steps, or it may be capable of continuous movement between open and closed positions.
  • valve element is connected to the controllable motor drive by a “substantially incompressible” connector/actuator.
  • a “substantially incompressible” connector/actuator It will be appreciated that all materials may be compressible or extendible to some degree.
  • the term “substantially incompressible” is not intended to exclude generally rigid connectors that do not compress to a significant extent, but nevertheless may be formed of materials which can be compressed (e.g., upon application of a very large force to cause a very small change in length). Instead, the term “substantially incompressible” is intended to exclude connectors that are compressible to a significant extent, such as springs.
  • the term “substantially incompressible” may mean that the connector is compressible by 5% or less, typically 2% or less, for example 1% or less or 0.5% or less of its length.
  • the extent of compression may be measured when a compressive force of 10kN or more (for example 30kN) is applied to the connector for a period of 2 minutes or shorter, for example 1 minute or shorter or 30 seconds or shorter.
  • the connector is also substantially inextensible (i.e. when in use in the pressure reducing valve of the invention).
  • substantially inextensible is intended to exclude connectors that may be extended to a significant extent, but nevertheless it is noted that all materials may be, to some extent, extendable (provided sufficient force is applied).
  • the term “substantially inextensible” may mean that the connector is extendable by 5% or less, typically 2% or less, for example 1% or less or 0.5% or less of its length. In some instances, the extent of extension may be measured when an extensive force of 10kN or more (for example 30kN) is applied to the connector for a period of 2 minutes or shorter, for example 1 minute or shorter or 30 seconds or shorter.
  • the valve element may be connected directly to the end of the connector, such that there is a direct relationship between movement of the connector and movement of the valve element.
  • the valve element may be directly coupled to the controllable motor drive via one or more incompressible and/or inextensible connector(s).
  • the valve element may be connected indirectly to the end of the connector, via one or more incompressible and/or inextensible linkers, again such that there is a direct relationship between movement of the connector and movement of the valve element.
  • the term “connector” refers to the entire assembly such that a first end of the connector is connected to the controllable motor drive and the second end is connected to the valve element.
  • the term “connector” refers to the entire assembly linking I in between the valve element and controllable motor drive.
  • the connector may be linear in shape, such that it has its first and second ends at opposing ends along the length of the connector.
  • direct relationship typically means that there is a linear (e.g. a directly proportional) relationship between movement of the connector and movement of the valve element.
  • Embodiments of the invention that employ a rod or shaft as the connector give rise to a direct relationship between movement of the connector and movement of the valve element.
  • the connector may be a rod or shaft which is at one end connected to the valve element and at the other end connected to the controllable motor drive to provide a direct relationship between movement of the controllable motor drive and the valve element.
  • the motor drive, connector and valve element may act linearly within the same plane such that the motor drive causes linear movement of the connector, which in turn effects linear motion of the valve element.
  • Establishing a direct linear relationship between movement of the connector and movement of the valve element prevents undesirable lateral (i.e., side-to-side) movements of the valve element and connector, ensuring accurate control over the position and movement of the valve element.
  • the connector may be formed from a metal material, preferably one such as stainless steel which is corrosion resistant, or from a suitably tough plastics material (for example engineering plastics such as polyamides, polyesters, and polyacetals, e.g., polyoxymethylene), or from a combination of metal and plastics materials.
  • the connector comprises a spring
  • This direct relationship between the connector and the valve element overcomes the problems discussed above with conventional valves at low demands, as it is no longer necessary for the inlet or upstream water pressure in the valve to displace the spring from the “valve- closed” position before water can flow through the valve.
  • the valve element is therefore directly controlled by the controller irrespective of pressures on the diaphragm, piston or plunger, etc.
  • Movement of the connector by the controllable motor drive may directly control the distance between the valve element and the inlet.
  • movement of the connector by the controllable motor drive may directly control the distance between the valve element and the outlet.
  • the connector may provide a force of 3kN or greater to move the valve element.
  • the connector may provide a force of 5kN or greater, typically 10kN or greater or 15kN or greater, preferably 30kN or greater.
  • the inlet typically takes the form of a fluid supply orifice into the flow chamber.
  • the valve element may prevent fluid from passing through the fluid supply orifice by being inserted into the orifice or by covering the orifice. It will be appreciated that the valve element may be partially opened (i.e. , the orifice may be partially unblocked or partially uncovered) to allow fluid to pass through the orifice at a reduced pressure, compared to when the valve is fully open (i.e., the orifice is fully unblocked or uncovered).
  • the valve element is connected to a diaphragm, either by being directly attached to the diaphragm or by being connected via a rod or other non-extendable/non- compressible linker.
  • the diaphragm may partition the valve body interior to give the fluidflow chamber on the one side and a dry chamber on the other side.
  • the controllable motor drive is typically provided in or above the dry chamber such that it does not come into contact with fluid in the flow chamber during use.
  • the valve element may attach (directly or via an incompressible linker) to a piston.
  • the piston may be arranged for reciprocating movement in a cylinder formed or mounted within the body.
  • the use of a piston arrangement limits the movement of the valve element to longitudinal movement (i.e., towards and away from the inlet orifice, perpendicular to the orifice). Undesirable lateral (i.e., side-to-side) movements are prevented by the piston cylinder.
  • the cylinder may be a formation integrally formed with the body, or it may be formed separately and secured inside the body, for example by mechanical fastenings, interference fit, welding, adhesive, and combinations thereof.
  • the cylinder may be formed from a metal material, preferably one such as stainless steel which is corrosion resistant, or from a suitably tough plastics material (for example engineering plastics such as polyamides, polyesters, and polyacetals, e.g., polyoxymethylene), or from a combination of metal and plastics materials.
  • a metal material preferably one such as stainless steel which is corrosion resistant
  • a suitably tough plastics material for example engineering plastics such as polyamides, polyesters, and polyacetals, e.g., polyoxymethylene
  • the cylinder and piston may partition the valve body interior to give the fluid-flow chamber on one side and a dry chamber on the other side (in the same way as the diaphragm described above).
  • the controllable motor drive is typically provided in or above the dry chamber such that it does not come into contact with fluid in the flow chamber during use.
  • the piston may likewise be formed from a metal material, preferably one such as stainless steel which is corrosion resistant, or from a suitably tough plastics material, or from a combination of metal and plastics materials.
  • both the piston and the cylinder may be formed from a metal material selected from stainless steel and aluminium (or an alloy thereof).
  • the piston and cylinder are typically of circular cross section.
  • a fluid-tight seal is provided between the piston and the cylinder.
  • the seal is typically provided by means of a sealing ring extending around the piston.
  • the sealing ring may be formed from a suitable elastomeric sealing material, for example a synthetic rubber material such as neoprene, nitrile rubber or butyl rubber and may take the form of one or more O- rings.
  • the O-rings may have a conventional circular cross-section, or they may have a noncircular cross-section provide that the cross-section shape does not hinder movement of the piston.
  • the sealing rings e.g.
  • O-rings may be formed from a suitable metal material or from a combination of a metal material and an elastomeric sealing material, or from a combination of an elastomeric sealing material and a non-elastomeric polymeric material such as polytetrafluoroethylene (PTFE). Suitable materials for use in forming sealing rings are well known to the skilled person.
  • the seals e.g., O-rings
  • the length of the cylinder is selected to ensure that a desired range of movement of the piston can be accommodated without the piston being expelled from the cylinder by unexpectedly high fluid pressures.
  • the side of the piston facing the fluid supply inlet orifice acts as a valve element and can be moved towards the orifice to restrict or prevent the flow of fluid into the fluid-flow chamber.
  • the piston is advantageously mounted on a guide rod which is received in a guide channel in the orifice, thereby ensuring that the piston is correctly centred and moves along a reciprocating path.
  • a separate valve element may be mounted on the piston, for example on a mounting rod or shaft extending axially from the piston.
  • the connector may be attached to a linkage connecting a plunger on the one end and the controllable motor drive on the other.
  • the plunger may be arranged for reciprocating movement in a cylinder formed or mounted within the body. The use of a plunger arrangement limits the movement of the valve element to longitudinal movement (i.e. towards and away from the outlet or inlet orifices and perpendicular to the orifice).
  • the cylinder may be a formation integrally formed within the body, or it may be formed separately and secured inside the body, for example by mechanical fastenings, interference fit, welding, adhesive, and combinations thereof.
  • the cylinder may be formed from a metal material, preferably one such as stainless steel which is corrosion resistant, or from a suitably tough plastics material (for example engineering plastics such as polyamides, polyesters, and polyacetals, e.g., polyoxymethylene), or from a combination of metal and plastics materials.
  • the cylinder and plunger may partition the valve body interior to give the fluid-flow chamber on the one side and a dry chamber on the other side (in the same way as the diaphragm described above).
  • the plunger is typically placed inside the cylinder to separate the dry chamber from the flow chamber.
  • the controllable motor drive is typically provided outside the valve body such that it does not come into contact with water in the flow chamber during use.
  • Longitudinal movement of the plunger may be effected by pivoting lever arms.
  • the lever arms are mounted on a shaft or shafts passing through the body and cylinder and may be driven by the controllable motor drive.
  • the lever arms convert rotational motion of the shaft into a linear motion of the plunger and consequently, the valve element.
  • Suitable seals are mounted on the shafts to prevent the passage of water from the flow chamber.
  • the plunger may likewise be formed from metal material, preferably one such as stainless steel which is corrosion resistant, or from a suitably tough plastics material, or from a combination of metal and plastics materials.
  • the length of the cylinder is selected to ensure that a desired range of movement of the plunger can be accommodated without the plunger being expelled from the cylinder.
  • the side of the plunger facing the fluid outlet orifice acts as a valve element and is biased towards the orifice to restrict or prevent the flow of fluid out of the fluid-flow chamber.
  • the plunger is advantageously connected with an connector which is in turn connected to a lever arm ensuring that the plunger is correctly centred and moves along a reciprocating path.
  • the body may have an interior void partitioned by the diaphragm or cylinder into a fluid-flow chamber on one side of the diaphragm/cylinder and a dry chamber on the other side of the diaphragm/cylinder, wherein the fluid-flow chamber is provided with the fluid supply orifice into the chamber and a fluid outlet.
  • dry chamber it is meant that the interior of the chamber does not come into contact with the fluid passing through the valve.
  • both chambers on either side of the diaphragm in the PRV are “wet” chambers, i.e., are exposed to the fluid (in that case water) passing through the valve.
  • the PRVs of the invention are described for use when the fluid is water in a water mains network and for reducing the pressure of water from the mains to suitable pressures for downstream pipe networks. Accordingly, the pressure reducing valves are generally larger in capacity than other valves (that may be present in other water mains pressure reducing valves), such as pilot valves and differential control valves.
  • the inlet to the chamber may take the form of or comprise a fluid supply orifice.
  • the fluid supply orifice may be circular in shape and may have a diameter of 20mm or greater, for example 20mm or greater, preferably 50mm or greater, such as 80mm or greater, 200mm or greater or 500mm or greater.
  • the fluid supply orifice may have a cross-sectional area of from about 300mm 2 to about 95000mm 2 , more usually from about 1000mm 2 to about 50000mm 2 , and more typically from about 2000mm 2 to about 32000mm 2 .
  • the chamber may have a volume of 50cm 3 or greater, for example 500cm 3 or greater, preferably 1750cm 3 or greater, such as 5000cm 3 or greater.
  • controllable motor drive may be coupled to the valve element through a rotational mechanism, whereby rotary motion is converted into linear motion via the connector.
  • valve element may be connected to the controllable motor drive through a cam mechanism that translates rotary motion from the motor drive into linear motion of the valve element.
  • cam mechanism constitutes the “connector” in this embodiment as it refers to the entire assembly linking I in between the valve element and controllable motor drive.
  • the cam mechanism may comprise a cam in combination with a cam follower, wherein the cam is coupled to the controllable motor drive and the cam follower is coupled to the valve element.
  • the cam and the cam follower form the connector.
  • the cam may be designed with a specific contoured surface (profile) to impart a predetermined type of motion to a cam follower. Examples of cam profiles include eccentric, circular, or irregular profiles, each capable of generating distinct linear motion; for instance, an eccentric cam profile can produce sinusoidal linear motion.
  • the cam follower may contact the cam surface and convert the rotary motion of the cam, driven by the controllable motor drive, into linear motion.
  • the follower moves in a manner dictated by the cam's geometry and as the cam follower moves, the valve element opens or closes accordingly, regulating the flow of water.
  • the cam may be coupled to the controllable motor drive via a camshaft, wherein the camshaft’s rotational speed determines the rotational speed of the cam.
  • movement of the valve element which controls the flow of water from the high-pressure mains to the downstream/lower pressure distribution network is controlled directly by the controllable motor drive.
  • the valves of the invention are therefore advantageous in that they are of a simpler construction and do not require the presence of pilot or other control valves with all the associated pipework, fixed orifices, filters, and isolating valves etc.
  • the pressure reducing valve (PRV) of the invention does not have a hydraulic control mechanism comprising a pilot valve, and in particular does not comprise a hydraulic control mechanism comprising a pilot valve and optionally a differential control valve (DCV) connected in a bypass pipe to the PRV.
  • the pressure reducing valves of the invention may form part of a flow-controlled pressure reducing valve system (FCPRVS).
  • FCPRVS may include a pressure reducing valve (as described herein) and further comprises an electronic data store held within or being in communication with a controller.
  • the data store contains data defining a relationship between fluid flow rate and output pressure into a downstream pipe network to maintain a desired pressure at a critical remote location to which the FCPRVS is connected.
  • Leaks within a water distribution network can be reduced by reducing the pressure of water being supplied to the network. It is preferable, however, that the water pressure at critical points is maintained by the FCPRVS at minimum predetermined levels. Therefore, the FCPRVS of the present invention can be controlled in response to the water pressure measured by a pressure sensors at one or more critical points remote from the FCPRVS to avoid unnecessary/undesired over-pressurisation of the network, which in turn reduces leakages in the network being supplied. It will also be appreciated that by reducing overpressurisation of the system, the overall water consumption by consumers can also be decreased. Although some uses of water (e.g.
  • references to a critical point of a network include references to users at the critical point, for example users at the critical locations or users located at the top of a hill.
  • the controller continuously adjusts the motor drive in response to flow data collected from a flow meter. This enables “real time” regulation of the motor drive according to the measured flow rate and the established relationship between fluid flow and pressure. Additionally, the actuation system may log flow data for performance monitoring, enabling ongoing analysis and comparisons to ensure optimal system operation and reliability.
  • FCPRVS flow-controlled pressure reducing valve system
  • a controller and an electronic data store held within or being in communication with the controller the data store containing data defining a relationship between fluid flow rate and fluid pressure in a downstream pipe network to which the pressure reducing valve is connected wherein the controller is arranged to receive flow data from the flow meter and to control the motor drive for withdrawal or advancement of the valve element in accordance with the flow rate measured by the flow meter and the relationship between fluid flow and output fluid pressure.
  • a desired downstream fluid pressure e.g. at a remote user
  • controllable motor drive is a servo motor drive.
  • the controller can be adapted for calculation of the controllable motor drive action and thus the position of the valve element in accordance with a relationship between flow and pressure losses in a network downstream of an FCPRVS and therefore the required outlet pressure of the FCPRVS that is required to maintain a required pressure at a critical point in the network.
  • the calculation can be based on the pressure to be achieved in terms of the controllable motor drive positioning of the valve element.
  • it can be adapted for controllable motor drive action in accordance with a lookup table of downstream pressure and flow rate which can be stored in the controller.
  • the lookup table can include values of pressure to be achieved, but it preferably can also include valve element positions and/or required movements of the substantially incompressible connector in order to achieve a desired valve position.
  • the lookup table provides the output pressure required to maintain the desired pressure at the critical point.
  • the controller can be programmed, or instructed by a remote control centre, to vary the flow rate so as to ensure that the minimum water pressure provided to a remote user in the network (i.e. the user at which there is the greatest pressure drop) is within the range from 0.5 Bar to 3 Bar. More usually, the controller is programmed, or instructed by a remote control centre, to vary the flow rate so as to ensure that the minimum water pressure provided to a remote user in the network is within the range from 1 Bar to 2 Bar, typically 0.6 Bar to 1.5 Bar, more typically 0.7 Bar to 1.2 Bar. In one embodiment, the minimum water pressure provided to a remote user in the network is approximately 1 Bar.
  • the pressure reducing valve is preferably a valve for controlling the flow of water to a local area network or a district metered area (DMA).
  • the pressure reducing valve may therefore be connected at its upstream end to a high-pressure mains (e.g. pressures of 6 bar or greater, for example, pressures of 10 bar or greater, 15 bar or greater or even 20 bar or greater) and at its downstream end to a network of distribution pipes forming a district metered area.
  • a high-pressure mains e.g. pressures of 6 bar or greater, for example, pressures of 10 bar or greater, 15 bar or greater or even 20 bar or greater
  • the FCPRVS apparatus of the invention may be connected to a remote-control facility. Any or all of the flow meter, pressure sensors and controller may be connected to the remotecontrol facility for example by wired or wireless communication. In one embodiment, only the controller is connected to the remote-control facility, although it will be appreciated that data from the flow meter and pressure sensors may be transmitted to the remote-control facility via the controller. In another, and preferred, embodiment, the controller is connected to the remote-control facility.
  • FCPRVS Whilst the FCPRVS is intended to function without the need for specific user input, by connecting the FCPRVS of the invention to a remote-control facility, it is possible for local control of the FCPRVS to be overridden remotely (e.g. manually), for various operational reasons, such as the detection of abnormally high or low flows of water in the network that are indicative of a major leak, for example a burst pipe or arising from maintenance work or changes made for network management purposes.
  • the controller may be programmed to send alarm signals to the remote-control facility if water flows exceed or fall below a certain threshold level, which may be indicative of a major leak upstream or downstream of the FCPRVS or other unusual demand such as irrigation, fire attendance etc.
  • the invention provides a fluid pressure reducing valve apparatus comprising a pressure reducing valve (e.g. as described herein), a controllable motor drive, a flow meter and controller as defined herein, wherein the fluid pressure reducing valve apparatus is linked (e.g. wirelessly) to a remote control facility, from which remote control facility, the operation of the apparatus can be remotely controlled.
  • a pressure reducing valve e.g. as described herein
  • a controllable motor drive e.g. as described herein
  • a flow meter and controller as defined herein
  • a local network will typically form part of a larger network in which a plurality of lower pressure local networks are each connected to a high pressure main by the FCPRVS’s of the invention.
  • FCPRVS typically installed into a water distribution network underground and so may need to be protected from damage from water in the ground surrounding elements/components of the FCPRVS.
  • the FCPRVS may comprise a casing which may enclose the controller, the modems (for transmission and receipt of data) and batteries.
  • the controller, modems and/or batteries may be provided in a separate casing to the PRV, provided that the controller, modems and/or batteries are linked (wired or wirelessly) to the PRV.
  • the casing is typically waterproof to ensure that the components contained within are not affected or damaged by water.
  • a water distribution network control unit comprising: a) a pressure reducing valve, as described herein; b) an electronic controller in electronic communication with a transmitter and a receiver and the controllable motor drive of the pressure reducing valve; and c) a casing for housing at least part of the pressure reducing valve, the electronic controller, transmitter and receiver.
  • the electronic controller, transmitter and/or receiver are typically electrically powered.
  • the control unit may also comprise a battery (e.g. a rechargeable battery) housed within the casing and/or a mini-water turbine electricity generator.
  • the electronic controller is typically programmed with software to control the output pressure of the pressure reducing valve in real-time by advancement or withdrawal of the incompressible connector so that it can be increased or decreased according to a Flow/Pressure profile, which is calculated to ensure a minimum desired pressure at a critical location.
  • the software may also be capable of raising alarms in the event of unexpected changes in flow rates and pressure levels, either upstream or downstream of the pressure reducing valve.
  • the controller may raise an alarm and allow pressure and flow rates to change in the event of an unusual or unexpected change in demand for water. Such an event may be a fire downstream of the PRV, where an increase amount of water is required.
  • the electronic controller is in electronic communication with a transmitter and a receiver to allow the pressure reducing valve to be fully controlled from a remote control facility and/or a mobile control device (such as a laptop, tablet or mobile telephone).
  • a mobile control device such as a laptop, tablet or mobile telephone.
  • the electronic controller may contain a data store which maintains a lookup table or control formulae derived from the calculated Flow/Pressure relationship for real-time advancement/withdrawal of the incompressible connector. It may be possible for the controller to be reprogrammable (manually or automatically) in the event of changes to the downstream water network (e.g. the development of new housing estates or factories).
  • the casing is typically waterproof to ensure that the components of the water distribution network control unit contained within are not affected or damaged by underground water.
  • the casing may be formed from a corrosion-resistant metal (such as stainless steel) or a suitable plastics material. Parts of the casing are typically provided with appropriate seals to form a waterproof encasing.
  • waterproof may refer to the ability to withstand the ingress of water when submerged in 50cm or more, for example 1 m or more or 2m or more of water for a period of 30 minutes or longer, for example 1 hour or longer or 2 hours or longer.
  • the pressure reducing valve and/or a casing within which the pressure-reducing valve is at least partially housed can be provided with one or more security devices for detecting and/or preventing unauthorised access to the valve and/or casing.
  • the security devices can be, for example, selected from sensors, switches, electronic security tags and cameras.
  • the security devices are preferably in communication with (e.g. by cabling or wirelessly), either directly or through the electronic controller, to a remote control facility so that unwanted interference can be notified to an operator of a water distribution network.
  • the security device(s) can take the form of one or more switches or security tags that are triggered by the opening or partial or complete removal of the casing. The triggering of the switch(es) by the opening/removal of the casing may initiate a warning to the remote control facility to indicate that the casing has been tampered with.
  • Communications signals sent between the electronic controller, a remote control facility and any security devices present are preferably encrypted to prevent hacking and control over the network being acquired by unauthorised parties.
  • a generator which can generate electricity as a result of the flow of fluid through the unit.
  • the generator may be in line (or in series) with the FCPRVS, and the generator may be upstream or downstream of the valve, such that fluid passing through the valve can be used to generate electricity by the generator.
  • the FCPRVS may be provided with a bypass conduit, in which the generator may be located.
  • the bypass conduit may be connected and in fluid communication at its upstream end with the source of high-pressure water (i.e. , upstream of the valve element in the pressure reducing valve) and the other end in communication with the low-pressure side of the valve.
  • Figure 6 is a schematic view of a local water supply network showing a water main having an FCPRVS and a local network comprising a plurality of user connections and leaks downstream of the FCPRVS.
  • the valve element (109) is arranged opposite the orifice (105).
  • the valve element (109) may form part of the lower plate (112) or may be separately provided on guide rod (114) extending from the lower diaphragm plate (112).
  • the guide rod (114) extends down from the valve element (109) into a guide (116) in the inlet orifice (105).
  • the guide rod (114) extends through the valve element (109), the diaphragm (110) and the diaphragm plates (111,112).
  • the guide rod (114) carries a nut (117) bearing on a washer (118) and the upper diaphragm plate (111).
  • the guide rod (114) is formed to be a clamping facility to hold the upper and lower diaphragm plates (111 and 112) along with the valve element (109) fixed in relation to each other.
  • the arrangement centres, clamps and seals the diaphragm in a fluid tight manner around the guide rod (114).
  • the arrangement also keeps valve element (109) centred over the inlet orifice (105).
  • a solid, inextensible, and incompressible drive connector (119) is secured to and extends from the upper diaphragm plate (111) through the dry control chamber (103a) and is attached to the end of a drive tube (125) of a servo motor (126).
  • the drive tube is housed in a fixed tube of the servo motor.
  • a lead screw is journaled for axial alignment in the drive tube within the fixed tube.
  • a motor and gearbox are arranged to drive the lead screw.
  • a nut, preferably a recirculating ball nut, is fast with the remote end of the drive tube (125), with the latter keyed to the fixed tube against rotation.
  • the drive connector (119) can be advanced or retracted to directly move the valve element (109) towards or away from the orifice (105), by rotation of the motor and lead screw.
  • An O-ring (not shown) formed from a suitable elastomeric sealing material such as neoprene or a nitrile rubber is mounted in a circumferential groove around the piston element (210) and forms a seal with the cylinder (211) preventing the leakage of water between the fluidflow chamber (203) and dry control chamber (203a).
  • a suitable elastomeric sealing material such as neoprene or a nitrile rubber
  • one or more metal piston rings may be used instead of the elastomeric O-ring.
  • the control chamber (203a) is a dry chamber, and the water does not flow into this space.
  • a solid, inextensible, and incompressible drive connector (219) is secured to and extends from the piston (210) through the dry control chamber (203a) and is attached to the end of a drive tube (225) of a servo motor (226).
  • the drive tube is housed in a fixed tube of the servo motor (226).
  • a lead screw is journaled for axial alignment in the drive tube within the fixed tube.
  • a motor and gearbox are arranged to drive the lead screw.
  • a nut, preferably a recirculating ball nut, is fast with the remote end of the drive tube (225), with the latter keyed to be a fixed tube against rotation.
  • the drive connector (219) can be advanced or retracted to directly move the valve element (209) towards or away from the orifice (205), by rotation of the motor and lead screw.
  • Figure 8 represents a typical flow pattern in a network being supplied through a conventional or fixed output pressure reducing valve. It will be appreciated that this flow pattern is only representative and actual flow patterns may be different depending on the nature of water use downstream of the PRV. It can, however, be seen that maximum flow only occurs for short periods of time or portions of a daily cycle. The flow or demand is shown in a solid line and the corresponding pressure feeding the downstream network is shown in the broken line. It can be seen that, most of the time, the network is over pressurised (i.e. the pressure is much greater than the “legal” or “recommended/desired” minimum pressure required to be provided for all users). This over pressurisation increases the rate of flow from the leaks (137) regardless of the rate of water demand by the users (138).
  • Figures 4 and 5 show the FCPRVS including a casing in situ in a water mains pipeline from two different angles.
  • components of the FCPRVS are encased within a casing. Wiring is omitted from these figures for the sake of clarity.
  • the casing is partially cut away to show the components inside the casing.
  • the components in Figures 4 and 5 are described with reference to the PRV shown in Figure 1.
  • the FCPRVS shown in Figures 4 and 5 could instead comprise a PRV as described in Figures 2 and 3.
  • the casing (400) is formed from two circular end plates (401, 402) and a cylindrical side wall (404). Circular support plates (406, 410) are also provided, which are dimensioned to fit within the cylindrical wall (404).
  • the support plates (406, 410) are held together and spaced apart by four vertical support rods (408).
  • the ends of the support rods (408) are provided with threaded ends.
  • Each end of the support rod (408) passes through a hole in each of the support plates (406, 410) and is secured to the support plates (406, 410) by means of nuts (409), which engage with the threaded ends of the support rods (408).
  • the end plates (401 , 402) are provided with O-ring seals, which form an IP68 standard waterproof seal with the circular wall (404) to form a sealed unit which houses the components of the FCPRVS.
  • Lower support plate (410) and lower end plate (401) are each provided with a central hole through which the end of the drive tube (125) remote from the valve may pass in order to engage with and be driven by the servo motor (126).
  • the lower end plate (401) is secured to the top of the body of the PRV (100) by a series of nuts and bolts, with a seal placed between the end plate (401) and the PRV (100) to form a watertight seal between the casing (400) and the PRV (100).
  • the casing (400) is typically designed to IP68 specification to withstand being submerged at a depth of up to 2m and for two hours or more.
  • the casing (400), more specifically the end plates (401, 402) and side wall (404), may be formed a metal suitably treated to be corrosion-resistant, stainless steel or a suitable plastics material.
  • the casing (400) may be secured to the body of the PRV (100) by a bolt (430) or other similar means, where required with suitable O-rings and/or a non-setting material such as a mastic, silicone (e.g. silicone grease) or other paste.
  • the casing is also provided with a tamper detector which is connected to the controller and can trigger an alarm in the event that the casing is opened by an unauthorised person.
  • a generator (420) may also be provided which can be in-line or in a bypass tube and driven by the flow of water preferably from the high-pressure mains water (106).
  • the electrical outputs of the generator (420) are connected to the battery (412) through the controller (134) to enable charging of the battery. This enables the apparatus to be powered without the need for connection to an external power supply.
  • the generator (420) for charging the battery (412) may be in a bypass (422) between the upstream pipework (106) and the downstream pipework (108).
  • the generator may alternatively (or additionally) be connected in-line between tappings in the inlet (104,204,304) and the outlet (107,207, 307) sides of the body (102, 202, 302) of the pressure reducing valve (101,201 ,301).
  • An electronically controlled valve (424) is provided within the bypass line containing the generator (420) which is controlled by the controller (134) to turn on and off the supply of water to the generator (420). This can ensure that the battery (412) is not overcharged.
  • the pressure reducing valve apparatus of the invention may be in communication with a remote-control facility (139) to enable information regarding the performance of the FCPRVS (e.g., flow rates, water pressures, connector position and other management information) to be monitored remotely.
  • a remote-control facility e.g., mobile or wireless communication means are being used and, accordingly, mobile modems may be used. These enable information to be transmitted from the remote point and received wirelessly by the controller as well as providing communications with a remote-control facility (139)
  • a cable connects the modem inside the casing to a point outside the casing.
  • This connecting point may be a bolt attached to the casing with a point of cable connection, e.g. threaded, provided both inside and outside the casing.
  • a further cable connects the casing to, for example, a manhole cover or a suitable metallic structure, which can also act as an antenna for wireless connection to the control room and/or the remote pressure sensor.
  • the antenna may be dipole, monopole or an array.
  • the casing may have a direct wired cable connection to the remote control room.
  • FIG. 10 is a table showing the records.
  • Figure 11 is the graphical representation of this table. Due to leakage, there is never zero flow rate even if there is no demand from any users (138) in the downstream network (108). Flow and output pressure readings can be made during periods of higher and lower flows while adjusting the pressure reducing valve, so as to provide the predetermined pressure at the critical location.
  • a Flow/Pressure Profile for the pipe network (108).
  • This profile can be used to predict the output pressure of the FCPRVS (by reference to flow rate) and will also indicate an unexpected increase or decrease in flow rate into the network or DMA.
  • This data is stored in the controller and can be used to determine the Pressure Flow Profile downstream of the FCPRVs or simply a lookup table for pressures required at particular flow rates in order to maintain a desired pressure at a critical point downstream of the FCPRVS.
  • the controller can then control the servo motor (126, 226, 326) to adjust the position of drive connector (119, 219, 315) and thus the valve element (109, 209, 309) to give the desired output pressure of the FCPRVS.
  • the area of the valve member is much smaller than the area of the diaphragm and so the forces acting on the valve member were higher as, just prior to closing, the forces exerted on the diaphragm were transferred and were now acting on the smaller valve member area only.
  • the force in the spring however was still that required to move the diaphragm and therefore the valve member to the closed position.
  • the force exerted by the spring to overcome the force acting on the underside of the diaphragm, because of the upstream pressure was now acting on the valve member which had a much smaller surface area than the diaphragm and therefore was higher than that required to close the valve.
  • the drive connector had to be withdrawn more than would be necessary to cause the valve to close in order to allow the valve to open again.
  • the spring in the pressure reducing valves of the prior art has been removed and replaced with a fixed length drive connector (119).
  • the fixed and substantially incompressible and inextensible drive connector does not respond to the fluctuating pressure in the same way as the spring.
  • the effect of the dynamic pressure changes which caused fluttering of the diaphragm were removed and fluctuating pressure were not simply passed to the downstream.
  • the potential for sudden closing of the valve at very low flows such as at night was removed as the diaphragm was always held in a fixed position as determined by the Flow Pressure relationship for the network.
  • the drive connectors (119, 219) of the FCPRVS act against the force exerted by the diaphragm (110) or the piston (210), which is subject to the pressure in the inlet (104, 204) to be regulated. Movement of the drive connector (119, 219) moves the valve element (109, 209) by the same amount thus causing a change in the output pressure of the FCPRVS.
  • the drive connector (315) of the pressure reducing valve acts against the force exerted on the valve element (309) of the plunger (311) which is subject to the pressure in the inlet (304). Movement of the drive connector (315) moves the piston (311) and valve element (309) causing a change in the output pressure of the FCPRVS.
  • the controller can be provided with a memory adapted to record a map of pressure and flow as opposed to merely memorising the movement of the drive connector and use this as a look-up table for the pressure to which an FCPRVS should regulate the downstream pressure as a function of measured flow.
  • the Flow/Pressure Profile characteristics of different local area networks (108) or a DMA will vary according to several variables including such things as the length of pipework, type of pipe material, the condition of the pipes, the number of users, the number of leaks in the network and the location of the most remote user etc. Therefore, when setting up the apparatus of the invention, an initial step is to establish a Flow/Pressure Profile relationship for the network and, in particular, to establish the output pressure of the FCPRVS into the network that is necessary to maintain a desired water pressure at the critical location (136) at all times during any twenty four hour period.
  • the flow rates and water pressures are measured by the flow meter (132, 232, 332) and pressure sensors (133, 233, 333) and the water pressure at the critical location (136) is measured by the remote pressure sensor (135).
  • the output pressure of the FCPRVS is adjusted as necessary using the positioning of the valve element (109, 209, 309) to change the output pressure of the FCPRVS as required so that a desired pressure at the critical location (136) is maintained.
  • the pressure and flow data are communicated from the flow meter and pressure sensors to the controller and the software establishes the Flow/Pressure Profile relationship between the flow rate and the output pressure as described above. This relationship can be updated from time to time if desired because of any network changes that may occur.
  • the controlling factor in the algorithm shown in Figure 13 is the remote pressure P R .
  • P R is the desired pressure at the critical location.
  • P D is the downstream pressure of the FCPRVS at the flow rate F D to give P R .
  • F N is an instantaneous flow rate.
  • P N is the downstream pressure at a flow rate F N .
  • P RN is the remote pressure at the flow rate F N .
  • T p is the time frequency for measuring F N , P N and P RN .
  • a predetermined allowable tolerance is set for the difference between P RN and P R . This tolerance can be a percentage difference of measured pressure or a fixed amount, for example 0.1 bar. This tolerance is entered into the software when the FCPRVS is being installed.
  • the desired remote pressure P R and the time period T p for adjusting downstream pressure P N are determined by the network management team.
  • the software stores the flow rate F D and the corresponding output pressure P D that gives the desired remote pressure P R .
  • F N , P N and P RN are recorded.
  • P R and P RN are compared. If P RN is higher than P R , the controller instructs the servo motor to drive the valve element towards the inlet orifice by a small (but preset) amount and vice versa if P RN is lower than P R . In this way the downstream pressure P N is changed. This is repeated and continues until the difference between P RN and P R is within the preset tolerance that has been determined by the management team. All measurements are recorded with a time stamp.
  • the time stamp includes the day, date and actual time.
  • the software can be used to generate the Flow Pressure Profile using either a linear relationship or a polynomial relationship.
  • the type of relationship to be used is determined by the network management team.
  • the software can generate either relationship formula. This relationship can be set as a general daily Flow Pressure relationship for the pipe network (108) or it can be established for each day of the week.
  • FCPRVS Flow/Pressure Relationship to be used for the control of an FCPRVS
  • the data collected is for same network of pipes connected to (i) a conventional PRV and (ii) to a flow controlled PRV fitted with a flow meter at the same time on consecutive weekdays.
  • the network of pipes being monitored is an existing local area network for a defined local water supply area.
  • the flow and corresponding pressure measurements are shown for both types of installations. It is noted that there are considerable savings 21.54% of the water supplied or 27.54% of the water consumed during this period when the FCPRVS was in operation. This saving will result because with the reduced pressure actual consumption will be reduced and very importantly as leakage is reduced because excess pressure has been removed from the downstream network.
  • Figure 11 is a graphical representation of data in the table in Figure 10.
  • the graphs in Figure 12 show the Flow Pressure Profile for this network.
  • Figure 12a shows the relationship calculated as a Linear relationship
  • Figure 12b shows the relationship calculated as a Polynomial Relationship for the same data set.
  • the equations shown on the graph are used by the software to calculate the output pressure of the pressure reducing valve that is required to maintain P R at the flow rate measured by the flow meter.
  • the software than instructs the servo motor to move to the appropriate position and so adjust the output pressure of the pressure regulation valve.
  • the software can establish both types of relationship.
  • the polynomial relationship is calculated to the 6 th order in the example which is considered by the inventor to be adequate for the purposes of the invention however this order can be changed if considered necessary.
  • the type of relationship to be used will be determined by the network management team.
  • the R 2 value for both equations is very similar indicating that both styles of relationship give a similar output pressure for the same flow rate.
  • the R 2 value is an indication of how well the data fits the calculated relationship. The closer R 2 approaches 1 the better the fit between the data and the calculated relationship. As more data is gathered the fit of the calculated data will be improved and the R 2 value will move nearer 1.
  • the R 2 value obtained with this data set is considered by the inventor to be adequate for the purposes for which the invention will be used.
  • the flow rate F N is the controlling factor in the algorithm shown in Figure 14.
  • F N is a flow rate.
  • P N is the downstream pressure from the FCPRVS at the flow rate F N .
  • P RN is the remote pressure at the flow rate F N .
  • P c is a calculated downstream pressure of the FCPRVS at F N using the selected form of Flow Pressure Profile formula.
  • a predetermined allowable tolerance is set for the difference between P N and P c and between P RN and P R . These tolerances can be a percentage difference of measured pressure or a fixed amount, for example 0.1 bar. These tolerances are entered into the software when the FCPRVS is being installed.
  • the flow rate F N and the corresponding downstream pressures P N and P RN are recorded.
  • P N is higher than P c the controller instructs the servo motor to drive the valve element towards the inlet orifice and vice versa if P N is lower than P c . In this way the downstream pressure of the FCPRVS is changed. P N and P c are compared again, and the procedure repeated until the difference between P N and P c is within the preset tolerance.
  • P RN can be checked and compared with P R at regular intervals as determined by the network management team however, the software can be programmed to instruct the controller to make appropriate adjustments to the position of the valve element if P RN falls outside a predetermined tolerance.
  • the software can also compare F N with the data recorded at the same time on the same days previously recorded. An acceptable maximum percentage change for F N is determined by the management team. If the percentage change is outside the range determined an alarm is raised at the control room so that the management team can take any actions that they feel may be appropriate.
  • control parameters can be changed accordingly and the Flow Pressure Profile recalculated, and automatic normal running can be resumed with the new profile.
  • flow changes may follow redesign of the network, developments in the network such as new housing or factories being built etc all of which may require recalculation of the Flow Pressure Profile.
  • FCPRVS 100,200, 300
  • the controller is programmed to respond and raise alarms, if necessary, should unexpected changes occur.
  • pressure reducing valves are typically set up so that the water pressure measured immediately downstream of the pressure reducing valve is the minimum water pressure required to give a predefined pressure at critical location (136), at maximum flow which only occurs for short periods of time.
  • the network is over- pressured for much of the time with the result that, inter alia, water losses through leakage are greatly increased.
  • This problem is avoided using the FCPRVS of the present invention.
  • the advantages of the FCPRVS the present invention compared to conventional pressure reducing valves set up to provide a constant water pressure are illustrated by the graphs shown in Figure 11.
  • the table in Figure 10 indicates savings of 21.54% of water supplied in the time period analysed, which corresponds to water saving as a percentage of the water used by a conventional PRV (e.g. (65100L - 51075L) / 65100L x 100).
  • this figure may be expressed as a percentage based on the total water used by the PRV of the invention as 27.46% (i.e. (65100L - 51075L) / 51075L x 100) - this is the figure named “water consumed” in Figure 10.
  • Aims of this invention are to:
  • the management team can then quickly ascertain if the change is a result of extra demand from for example changes in the network layout due to operational changes or a factory washout, a farm irrigation scheme starts up, demand from a fire department attending a fire etc or indicative of a pipe failure etc. In this way sudden bursts or increases in leakage are quickly identified and maintenance teams dispatched more quickly to carry out repairs.
  • the data gathered can also be used to develop more accurately placed maintenance of networks and pipe replacements schedules.
  • the controller (134) is linked to a Main or Remote-Control Facility (139), from which the networks can be controlled remotely if desired.
  • the Remote-Control facility (139) can be linked to a plurality of local networks as shown in Figure 7 all being supplied by a high-pressure Primary or secondary main (140), each of the local networks being provided with a pressure reducing valve apparatus of the invention.
  • the flow meters and pressure sensors in each local network can be linked to the Remote-Control Facility (139) and alarm signals generated in the Remote- Control Facility if abnormal flow rates (e.g., indicative of a mains failure or major leaks such as burst pipe) are detected.
  • abnormal flow rates e.g., indicative of a mains failure or major leaks such as burst pipe
  • controllers 134, 234,334
  • remote control of the downstream pressures for measured flow rates encountered can be achieved, and changes made where required for operational purposes.
  • the software can be programmed to prioritise the response of the FCPRV and monitor the outcomes of the pressure changes that are made.
  • FCPRVS installations can also be placed at strategic points in the trunk main (140), as shown for example in Figure 7.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

L'invention définit un système de réduction de pression de conduit maîtresse comprenant : • une vanne comprenant un corps de vanne dont l'intérieur comporte une chambre d'écoulement de fluide à travers laquelle un liquide peut passer, une entrée dans la chambre et une sortie de la chambre, un élément de vanne, qui est mobile entre une position fermée dans laquelle l'élément de vanne empêche le liquide de passer à travers la chambre et une ou plusieurs positions ouvertes dans lesquelles le liquide peut s'écouler de l'entrée, à travers la chambre et hors de la sortie, ainsi qu'un connecteur sensiblement incompressible relié au niveau d'une première extrémité à l'élément de vanne et au niveau d'une seconde extrémité à un entraînement de moteur pouvant être commandé; • un débitmètre • un dispositif de commande agencé de façon à recevoir des données d'écoulement provenant du débitmètre et à commander l'entraînement du moteur en vue du retrait ou de l'avancée de l'élément de vanne en fonction du débit mesuré par le débitmètre et de la relation entre l'écoulement de fluide et la pression de fluide. L'invention définit également un procédé de régulation de la pression d'eau dans un réseau local.
PCT/EP2024/088158 2023-12-22 2024-12-20 Système de réduction de pression de conduite maîtresse et procédé de régulation de pression dans des réseaux d'eau Pending WO2025133289A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23219769 2023-12-22
EP23219769.9 2023-12-22

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WO2025133289A1 true WO2025133289A1 (fr) 2025-06-26

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003057998A2 (fr) 2002-01-08 2003-07-17 Optimus Water Technologies Ltd. Systeme d'amenee d'eau
EP1398686A2 (fr) * 2002-09-12 2004-03-17 HP High Pressure SRL Ensemble de valve de régulation de pression
WO2021089986A1 (fr) 2019-11-04 2021-05-14 David Taylor Soupape de réduction de pression de liquide
WO2022233420A1 (fr) 2021-05-06 2022-11-10 Polymer Technologies Limited Soupape de réduction de pression de liquide
US11519814B2 (en) * 2019-02-15 2022-12-06 Fb Global Plumbing Group Llc Fluid usage monitoring and control system
WO2022268955A1 (fr) * 2021-06-23 2022-12-29 Braathen Thor F Armoire à eau

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003057998A2 (fr) 2002-01-08 2003-07-17 Optimus Water Technologies Ltd. Systeme d'amenee d'eau
EP1398686A2 (fr) * 2002-09-12 2004-03-17 HP High Pressure SRL Ensemble de valve de régulation de pression
US11519814B2 (en) * 2019-02-15 2022-12-06 Fb Global Plumbing Group Llc Fluid usage monitoring and control system
WO2021089986A1 (fr) 2019-11-04 2021-05-14 David Taylor Soupape de réduction de pression de liquide
WO2022233420A1 (fr) 2021-05-06 2022-11-10 Polymer Technologies Limited Soupape de réduction de pression de liquide
WO2022268955A1 (fr) * 2021-06-23 2022-12-29 Braathen Thor F Armoire à eau

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CANYON HYDRO: "Utility grade Pico hydro", 2 September 2016 (2016-09-02), XP093133279, Retrieved from the Internet <URL:https://soarhydro.com/downloads/CANYON_M300-System.pdf> [retrieved on 20240220] *

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