Improved valve assembly

Abstract

Valve assembly (1) for fluid, comprising a valve body (2) having a fixed opening (20) defined therein, and a closure (5) actuated so as to be movable relative to the fixed opening (20) between at least one open condition, in which the closure (5) defines at least one passage (2 ') for fluid flow through the valve assembly (1), and a closed condition, in which the closure (5) blocks fluid flow through the valve assembly (1). The valve assembly (1) is characterized in that it further comprises:-at least one first pressure tap (9 ') defined and / or mounted on the closing member (5) such that when the closing member (5) is in the at least one open state, the at least one first pressure tap (9') defines a total pressure tap; -at least one second pressure tap (9 '') defined and / or mounted on the closure (5) and configured to define a static pressure tap; -a measuring device (17) operatively connected to the first pressure tap (9 ') and to the second pressure tap (9' ') and configured to detect and / or determine at least one quantity for calculating the velocity and / or flow (Q) of the fluid through the valve assembly (1); and characterized in that the second pressure tap (9 ") comprises a Venturi tube (40) configured to increase the speed and to reduce the pressure of the fluid entering the second pressure tap (9"), thereby reducing the static pressure (Ps) of the fluid.

Description

Technical Field

[0001] This invention relates to an improved valve assembly. Preferably, but not limitingly, the valve assembly according to the invention can be installed in a device for distributing fluids, particularly for gases or liquids (e.g., water). More preferably, the valve assembly according to the invention can be installed in a device for distributing fluids to end users, for example for distributing gases present and circulating inside pipelines (e.g., pipelines in a natural gas distribution network or other gases produced in a decentralized manner, such as biomethane or hydrogen).

[0002] Therefore, the present invention has an advantageous use in the technical field of the production and sale of fluid (particularly gas or liquid (e.g., water)) distribution equipment and apparatus, and is advantageously applicable to networks for the transport and distribution of gases (particularly natural gas, or hydrogen and / or hydrogen / natural gas mixtures, or other gases produced in a dispersed manner, such as biomethane) or liquids (particularly water). Background Technology

[0003] Historically, flow meters were not installed in gas distribution networks because these networks lacked data connectivity, requiring operators to physically go to the site to obtain measurements—an expensive, inconvenient, and frequently repetitive task.

[0004] However, in current gas distribution networks (which also apply to water or other liquids), it is necessary to know the gas flow rates through each unit in the network (e.g., in the final pressure reduction unit (also known as the "GRF") that reduces gas pressure to the end user) in order to subsequently distribute the gas optimally among the units within the network itself. In particular, digital monitoring of the gas flow rates through each unit in the distribution network is required to allow network administrators to remotely monitor and balance (if not in real time) the gas flow between the units within the network itself.

[0005] In this context, if the geometry of the existing distribution network does not allow for the installation of flow meters (especially due to space constraints), it is inevitable and undesirable to completely change the geometry of the network itself; and if there is no possibility of even changing it (for example, when considering an underground distribution network, the surrounding concrete structure restricts its geometry), then the installation of flow meters must be abandoned.

[0006] In addition, it should be considered that inserting dedicated flow meters in distribution networks, especially in newly built networks, can lead to undesirable increases in construction and installation costs.

[0007] Furthermore, known flow meters typically installed in transmission networks are not only expensive, but also provide excessive levels of legal metering accuracy (especially relative to the flow measurement requirements of the distributed transmission network). Moreover, known flow meters often require long upstream and downstream straight pipe sections for installation, which are not always available in distributed networks.

[0008] Patent WO2014189395 describes a flow measurement system in which an additional dedicated component, a calibration measuring disc conforming to ISO 5167, is introduced inside the rotating ball shut-off element of a ball valve. This calibration disc generates a corresponding pressure differential between upstream and downstream as the flow rate changes. Therefore, a known correlation exists between flow rate and pressure differential for each measuring disc, allowing flow rate to be inferred by measuring the pressure differential. However, the solution in WO2014189395 is not particularly satisfactory because it only applies to ball valves and not to other types of valves (such as butterfly valves). Furthermore, the measuring disc inevitably reduces and / or obstructs the gas passage cross-section through the valve, effectively limiting the maximum capacity of the valve's nominal diameter and thus also limiting the maximum capacity of the piping on which the valve is installed. Summary of the Invention

[0009] The object of this invention is to provide a valve assembly that allows at least some of the aforementioned drawbacks of conventional solutions to be overcome.

[0010] Another object of the present invention is to provide a valve assembly that allows the shut-off and / or regulation of fluid flowing through it, and simultaneously allows the measurement of the velocity and / or flow rate of the fluid flowing through it.

[0011] Another object of the present invention is to provide a valve assembly that can be installed in an existing network without requiring additional space or changes to the geometry of the network itself.

[0012] Another object of the present invention is to provide a valve assembly that can be installed in any section of a fluid distribution network, particularly in the final pressure reducing unit.

[0013] Another object of the present invention is to provide a valve assembly that avoids the need to modify the geometry of the network on which it is installed.

[0014] Another object of the present invention is to provide a valve assembly that can also function as a measuring instrument in a transmission network.

[0015] Another object of the present invention is to provide a valve assembly that meets all regulatory requirements relating to this subject.

[0016] Another object of the present invention is to provide a valve assembly that is structurally and functionally completely reliable.

[0017] Another object of the present invention is to provide a valve assembly that is an improvement and / or replacement of a conventional valve assembly.

[0018] Another object of the present invention is to provide a valve assembly that has a high standard of safety and operability.

[0019] Another object of the present invention is to provide a valve assembly that can be manufactured simply, quickly and at a relatively low cost.

[0020] Another object of the present invention is to provide a valve assembly that has alternative characteristics in terms of structure and function to conventional valve assemblies.

[0021] Another object of the present invention is to provide a method for measuring the flow rate and / or velocity of a fluid (such as a gas or liquid (e.g., water)) flowing in a device (preferably in a device for dispensing the fluid).

[0022] According to the present invention, all the objectives mentioned herein (whether considered individually or in any combination) and other objectives that will become clear from the following description are achieved by the valve assembly as defined in claim 1. Attached Figure Description

[0023] The invention is further illustrated below with reference to the accompanying drawings and some preferred embodiments thereof (provided for purely illustrative and non-limiting purposes), wherein:

[0024] Figure 1 A perspective view of a fluid distribution device on which at least one valve assembly of the present invention is mounted is shown.

[0025] Figure 2A A perspective view of a first embodiment of a valve assembly according to the present invention is shown, the valve assembly being installed in a pipe and having the shut-off element open;

[0026] Figure 2B Showing Figure 2A A magnified perspective view of the valve assembly, showing the fluid flow pressure tap;

[0027] Figure 2C Showing Figure 2A Perspective view of the valve assembly;

[0028] Figure 3A A perspective view of a second embodiment of a valve assembly according to the present invention is shown, the valve assembly being installed in a pipe and having the shut-off element open;

[0029] Figure 3B Showing Figure 3A A magnified perspective view of the valve assembly, showing the fluid flow pressure tap;

[0030] Figure 3CShowing Figure 3A Perspective view of the valve assembly;

[0031] Figure 4 A front view of the valve assembly according to the invention in its closed state is shown;

[0032] Figure 5 The front view of the valve assembly according to the invention in the open state is shown;

[0033] Figure 6 A cross-sectional front view of the valve assembly according to the invention is shown, some of the components of which are shown schematically;

[0034] Figure 7A A perspective view of a third embodiment of a valve assembly according to the present invention is shown, the valve assembly being in a closed-off open state;

[0035] Figure 7B Showing Figure 7A Front view of the valve assembly with the shut-off element open; and

[0036] Figure 7C Showing Figure 7A Front view of the valve assembly with the shut-off element closed.

[0037] Figure 7D Showing with Figure 7C Same view, but without the unit having first and second port elements.

[0038] Figure 7E The diagram shows the result obtained from a cross-sectional plane along a cell parallel to the Y-axis and passing through the cell where the first and second port elements are located. Figure 7C A view of the valve assembly shown. Detailed Implementation

[0039] The present invention relates to a valve assembly, which is generally identified by reference numeral 1 in the accompanying drawings.

[0040] Advantageously, the valve assembly 1 according to the invention is suitable for use and installation in gas transport and distribution networks, particularly in distribution networks for natural gas or other gases produced in a decentralized manner (such as biomethane or hydrogen). The valve assembly in question can be advantageously used in distribution and / or transport networks, as well as for fluid distribution equipment, for example, particularly for final pressure reducing units (GRFs).

[0041] The valve assembly according to the invention can be advantageously used to cut off and / or change the flow of any fluid, whether it is a liquid (such as water) or a gas (such as natural gas or other gases produced in a dispersed manner (such as biomethane or hydrogen)), or even a multiphase fluid.

[0042] Preferably, as described above, the valve assembly 1 according to the invention is particularly, but not limited to, suitable for use and installation in a distribution device 100, particularly at the final pressure reducing unit (GRF) provided in a gas distribution network.

[0043] Conveniently, valve assembly 1 has two ports / channels, namely, inlet port 3 and outlet port 4.

[0044] Conveniently, the valve assembly 1 according to the invention cuts off and / or regulates / partially opens the fluid flow through the valve itself.

[0045] Specifically, the valve assembly 1 includes a valve body 2, which defines a fixed opening 20 and houses a shut-off element 5 (i.e., a moving part of the valve assembly 1) that acts on the fixed opening 20. Specifically, the shut-off element 5 is movable relative to the fixed opening 20 to block fluid flow or to define at least one channel 2' to allow and / or regulate / partially open the fluid flow through the valve assembly 1.

[0046] Conveniently, in a possible and preferred embodiment, valve assembly 1 may include a shut-off valve, wherein the shut-off element 5 is movable relative to a fixed opening between a (single / individual) open state (preferably maximum / fully open) and a closed state to allow fluid flow or cessation, respectively and uniquely. Conveniently, valve assembly 1 may therefore include a two-position valve (on / off), and preferably a safety valve.

[0047] Conveniently, in a possible and preferred embodiment, the valve assembly 1 may include a regulating valve, wherein the shut-off element 5 is movable relative to the fixed opening 20 between a closed state and a plurality of different open states (particularly including a maximum open state and at least one intermediate open state), thereby defining different regions for the channel cross-section 2' and changing the fluid flow through the valve itself in a controlled manner.

[0048] Conveniently, valve assembly 1 can be associated with a fluid inlet (e.g., defined by an upstream pipe segment T1) and a fluid outlet (e.g., defined by a downstream pipe segment T2). Conveniently, the inlet port 3 of valve assembly 1 is intended to be in fluid communication with the upstream pipe segment T1, while the outlet port 4 of valve assembly 1 is intended to be in fluid communication with the downstream pipe segment T2.

[0049] Preferably, mechanical connection devices for the upstream pipe segment T1 and the downstream pipe segment T2 can be provided on the valve body 2, such as the flange portion 29 of the downstream pipe segment T2.

[0050] Conveniently, the connection between the valve body 2 of the valve assembly 1 and the upstream portion T1 and the downstream portion T2 is waterproof to prevent fluid leakage to the outside.

[0051] Preferably, the valve body 2 has an annular shape (made of one or more components) and internally defines a channel 2'. Preferably, the valve body 2 is made of metal. Preferably, the valve body 2 may include a valve seat internally and at a fixed opening 20, preferably including a gasket, etc., which serves as a seat for the shut-off element 5 and ensures a fluid seal when in contact with the shut-off element 5.

[0052] Conveniently, the fixed opening 20 of the valve body 2 (where the closing element 5 acts) is orthogonal to the X-axis corresponding to the direction of fluid flow through the fixed opening. Conveniently, the X-axis has a direction corresponding to and consistent with the direction of fluid flow through the valve assembly 1, and in particular the fixed opening 20. Preferably, the X-axis may correspond to or be parallel to the longitudinal extension axis of the pipe sections immediately upstream T1 and immediately downstream T2 intended to be connected to the inlet and outlet of the valve assembly 1, respectively.

[0053] Preferably, the fixed opening 20 has a substantially circular cross-section. Preferably, the fixed opening 20 extends along the X-axis between the inlet port 3 and the outlet port 4 and faces the port. Preferably, the fixed opening 20, the inlet port 3, and the outlet port 4 are aligned with each other along the X-axis.

[0054] Conveniently, the shut-off element 5 housed inside the valve body 2 is operatively connected to an actuator (not shown) via at least one transmission component (preferably defined by the valve stem 10), the actuator being configured to cause the shut-off element 5 to move between at least one open state (where the shut-off element 5 allows fluid to flow through the at least one channel 2') and a closed state (where the shut-off element 5 blocks / intercepts the flow of fluid through the valve assembly 1).

[0055] Conveniently, the valve stem 10 transmits motion from the actuator to the closing element. Conveniently, the transmitted motion can be rotational to cause rotation of the closing element 5, or linear translational to cause translation of the closing element 5.

[0056] Preferably, the closing element 5 includes at least one rotatable body 8, and in particular, the body 8 is rotatable relative to the fixed opening 20 of the valve body 2. In particular, the body 8 is rotatable, and in particular, it is rotatable about a rotation axis Y orthogonal to the X-axis.

[0057] In a possible and preferred embodiment, the body 8 has a generally disc-shaped configuration and is provided with a first surface 8' and a second surface 8'", and is rotatable about a rotation axis Y, which passes through the disc-shaped body in a diametrical direction and is orthogonal to the X-axis. In this case, the valve assembly 1 conveniently includes a butterfly shut-off element.

[0058] Preferably, the shut-off element 5 is integral with the valve stem 10, which is mounted on the valve body 2 for movement relative to the latter, preferably for rotation about the Y-axis relative to the valve body 2. Conveniently, the valve stem 10 passes diametrically through the shut-off element 5 and is rotatably engaged at its end at a fixed opening 20 on the valve body 2. Conveniently, the valve stem 10 is operatively associated with an actuating device configured to cause rotation of the valve stem 10, and thus cause the shut-off element 5, integral with the valve stem 10, to rotate about the Y-axis corresponding to the longitudinal extension axis of the valve stem itself.

[0059] It should be understood that the body 8 of the closing element 5 may have other shapes based on knowledge available to those skilled in the art, such as being basically spherical, mushroom-shaped or conical.

[0060] The valve assembly 1 further includes at least one first pressure tap 9' and at least one second pressure tap 9'", the at least one first pressure tap 9' being defined and / or mounted on the shut-off element 5, and the at least one second pressure tap 9' being defined and / or mounted on the shut-off element 5.

[0061] Conveniently, the valve assembly 1 includes a fluid connection device 16 between the first pressure tap 9', the second pressure tap 9'” and the measuring device 17, as described in more detail below.

[0062] Advantageously, the connection device 16 includes at least one fluid circuit 13 formed inside the shut-off member 5 and / or the valve body 2 and / or the transmission component (preferably defined by the valve stem 10). Preferably, the fluid circuit 13 includes one or more conduits 13' formed inside the shut-off member 5 and / or the valve stem 10 and / or the valve body 2.

[0063] Conveniently, the first pressure tap 9' defines a total pressure tap, while the second pressure tap 9' defines a static pressure tap. Preferably, the first pressure tap 9' and the second pressure tap 9' (both mounted and / or defined on the closure 5) define the total pressure tap and static pressure tap of the Pitot tube, respectively.

[0064] Conveniently, the first pressure tap 9' is installed and / or defined in a region on the closure 5, which is in a stagnant zone when the closure itself is open. Conveniently, the second pressure tap 9" is installed and / or defined in a region on the closure 5 that is different from the region of the first pressure tap 9', and in this region, the flow field streamlines of the fluid are not altered by the presence of the pressure tap.

[0065] The first pressure tap 9' and the second pressure tap 9" are configured such that the shaft V1 extending orthogonally from the first pressure tap 9' has a different / non-coincident direction from the shaft V2 extending orthogonally from the second pressure tap 9" and a different orientation, or a coincident / parallel direction.

[0066] In particular, in one possible embodiment (see...) Figure 2B Shaftes V1 and V2 are parallel to each other and have opposite orientations. In particular, in another possible embodiment (see...), Figure 3B ), where axes V1 and V2 are perpendicular to each other.

[0067] Preferably, the first pressure tap 9' is mounted and / or defined on the closure 5 so that, in the open state of the closure, and preferably in its maximum and / or single open state, the first pressure tap 9' is open and faces the flow direction of the fluid through the fixed opening 20, thereby substantially intercepting the flow of the inlet fluid from the front.

[0068] Preferably, the first pressure tap 9' is mounted and / or defined on the closure member 5 so that, in the open state of the closure member, the axis V1 extending orthogonally from the first pressure tap 9' is substantially parallel but oriented opposite to the X-axis, which passes orthogonally through the fixed opening 20 in an orientation corresponding to the orientation of the fluid advancing through the valve assembly 1.

[0069] As previously described, the second pressure tap 9” is defined and / or mounted on the closing member 5 so that, in the same open state of the closing member, the shaft V2 extending orthogonally from the second pressure tap 9” defines an angle of approximately 90°-180° with the shaft V1 extending orthogonally from the first pressure tap 9’. Conveniently, in one possible embodiment (see...) Figures 2A-2C The shaft V2, extending orthogonally from the second pressure tap 9', is arranged at an angle of 180° relative to the shaft V1, which extends orthogonally from the first pressure tap 9'. Conveniently, in another possible embodiment (see...) Figures 3A-3C The shaft V2, which extends orthogonally from the second pressure tap 9”, is arranged at an angle of 90° relative to the shaft V1, which extends orthogonally from the first pressure tap 9’.

[0070] Preferably, the pressure taps 9', 9" are mounted and / or defined on the same side 8' of the closure 5; however, they may be suitably mounted and / or defined on different or opposite sides of the closure 5.

[0071] Preferably, the pressure taps 9' and 9" overlap each other along the direction / axis Y.

[0072] Advantageously, the closing element 5 can be in this closed state about the rotation axis Y (see...). Figure 4(where the first face 8' and the second face 8” are substantially transverse to the X-axis) and the open state (see Figure 5 (where the first face 8' and the second face 8” are substantially parallel to the X-axis) move between.

[0073] Advantageously, in one possible embodiment, a first pressure tap 9' and / or a second pressure tap 9" are formed in corresponding port elements 6' or 6" which are mechanically associated with the closure 5 and are preferably mounted on the closure 5.

[0074] Preferably, the first pressure tap 9' includes a first port element 6' mechanically mounted on the shut-off member 5, and the first port element 6' is in fluid communication with a fluid circuit 13, which is at least partially formed inside the shut-off member 5.

[0075] Preferably, the second pressure tap 9” includes a second port element 6” mechanically mounted on the closure 5, and the second port element 6” is in fluid communication with the fluid circuit 13, which is at least partially formed inside the closure 5.

[0076] Preferably, each port element 6' or 6" includes an "L"-shaped tubular portion 11, one end of which is open to define the first pressure tap 9' or the second pressure tap 9" and the other end is mechanically associated with the closure 5. Preferably, more specifically, the tubular portion 11 includes a first portion extending from the first face 8' (i.e., perpendicular to the axis V1 or V2) and a second portion extending parallel to the first face 8' (i.e., parallel to the axis V1 or V2), the second portion terminating at the corresponding pressure tap 9' or 9".

[0077] More specifically, in a preferred embodiment (see...) Figures 2A-2C The system provides a first port element 6' and a second port element 6'. The first port element 6' defines a first pressure tap 9' at its free end, and the second port element 6' defines a second pressure tap 9' at its free end.

[0078] Advantageously, in one possible embodiment, the first pressure tap 9' and / or the second pressure tap 9" are defined by corresponding holes 23 formed on the closure 5. Preferably, in the case of a disc-shaped closure 5, the hole is formed on one surface of the disc.

[0079] More specifically, in a possible and preferred embodiment (see...) Figures 3A-3C The closure 5 provides a first port element 6', which defines a first pressure tap 9' at its free end, while a second pressure tap 9' is defined by a hole 23 formed directly on the closure 5 body.

[0080] Preferably, in one possible embodiment, the valve assembly 1 includes a single unit 50, which includes a first port element 6' and a second port element 6'. Preferably, such a unit 50 may be defined by a single component that can be mounted on the shut-off member 5.

[0081] Preferably, in one possible embodiment, the first pressure tap 9' and the second pressure tap 9" are configured such that the shaft V1 extending orthogonally from the first pressure tap 9' has a direction parallel to and the same orientation as the shaft V2 extending orthogonally from the second pressure tap 9" . Conveniently, both pressure taps 9' and 9" can be opened by facing upstream of the valve assembly 1.

[0082] Preferably, the second pressure tap 9” includes a venturi tube 40 configured to increase velocity and reduce the pressure of the fluid entering the second pressure tap 9”, thereby reducing the static pressure P of the fluid. s .

[0083] In another possible and preferred embodiment of the valve assembly (see...) Figures 7A-7E The second port element 6” of the second pressure tap 9” includes a venturi tube 40. Preferably, the venturi tube 40 is located at the inlet of the second port element 6”. In particular, the second port element 6” of the second pressure tap 9” includes at least one portion configured as a venturi tube 40 to locally increase the fluid velocity entering the tap and reduce the corresponding pressure (i.e., static pressure P). s Preferably, the linear venturi tube 40 of the second port element 6” may have a cross-section that decreases / narrows starting from the inlet 41 of the second port element 6”. More specifically, the cross-section at the inlet 41 of the second mounting element 6” is wider and then narrows / decreases to increase the fluid velocity.

[0084] This is advantageous because it allows for an increase in the total pressure P of the fluid. T (corresponding to the fluid pressure drawn at the first pressure tap 9') and the static pressure of the fluid (P) s The pressure difference (i.e., dynamic pressure "dP") between the pressure tap (corresponding to the fluid pressure drawn at the second pressure tap 9") and the pressure tap 9”. Specifically, the Venturi tube 40 at the second pressure tap 9” allows for a reduction in the static pressure (i.e., static pressure P) at that tap. s This increases the pressure difference (i.e., dynamic pressure "dP"), thereby improving the accuracy of calculating the velocity and / or flow rate (Q) of the fluid passing through the valve assembly.

[0085] Preferably, the linear venturi tube 40 sequentially includes a wider first inlet section 41, a narrower / converging second / intermediate section 42, and a wider / divergent third / outlet section 43 (see...). Figure 7CPreferably, the linear venturi tube 40 is open at both ends, and particularly, the third / outlet section 43 is open at its free end. Specifically, when the shut-off element is in the open state, the inlet 41 of the linear venturi tube 40 is in fluid communication with the fluid inlet upstream of the valve assembly, while the third / outlet section is in fluid communication with the fluid outlet downstream of the valve assembly.

[0086] Preferably, the first port element 6' is open at one end for fluid to enter its interior, and then the first port element 6' is configured to communicate only with the first inlet channel 45 of the fluid loop 13 formed inside the closure 5.

[0087] Preferably, the second port element 6” is open at both ends so that incoming fluid can flow through it, and between the opposite ends of the second port element 6”, and more preferably downstream of the linear venturi tube 40, there is a channel for fluid communication with the second inlet channel 46 of the fluid circuit 13 formed inside the closure member 5.

[0088] Preferably, the second port element 6”, including the venturi tube 40, is integrally defined with the first port element 6' so as to be mounted together on the same closure 5, more preferably on the first surface 8' of the body 8 of the closure 5. Preferably, the first port element 6' and the second mounting element 6” overlap each other along the direction / axis Y.

[0089] Furthermore, according to the present invention, the valve assembly 1 includes a measuring device 17 operatively connected to the first pressure tap 9' and the second pressure tap 9'', and configured to detect and / or determine at least one amount for calculating the velocity and / or flow rate Q of the fluid passing through the valve assembly 1.

[0090] Conveniently, the measuring device 17 is configured to detect and / or determine at least one of the following quantities:

[0091] -The total pressure of the fluid "P" T "and the static pressure of the fluid "P" s The total pressure of the fluid, "P". T "The static pressure of the fluid corresponding to the pressure drawn from the first pressure tap 9' is P." s "Corresponding to the pressure of the fluid drawn at the second pressure tap 9", and / or

[0092] - The dynamic pressure "dP" of a fluid, which is the total pressure "P" of that fluid. T (corresponding to the pressure of the fluid drawn at the first pressure tap 9') and the static pressure of the fluid "P" s The differential pressure between (corresponding to the pressure of the fluid drawn at the second pressure tap 9") and / or

[0093] - The flow rate "q" of the fluid originates from the pressure difference between the total pressure and the static pressure, and in particular, it corresponds to the flow rate of the fluid flowing in the bypass circuit, which receives the fluid flow drawn from the first pressure tap 9' and reintroduced into the second pressure tap 9", thereby providing a signal representing the flow rate "q" of the flow originating from the pressure difference between the first and second pressure taps.

[0094] Conveniently, the valve assembly 1 includes a fluid connection device 16 between the first pressure tap 9', the second pressure tap 9" and the measuring device 17.

[0095] Advantageously, the connection device 16 includes at least one fluid circuit 13 formed inside the shut-off member 5 and / or the valve body 2 and / or the transmission component (preferably defined by the valve stem 10). Preferably, the fluid circuit 13 includes one or more conduits 13' formed inside the shut-off member 5 and / or the valve stem 10 and / or the valve body 2.

[0096] Advantageously, the fluid circuit 13 connects each pressure tap 9' or 9" to a corresponding pressure sensor and / or differential pressure sensor.

[0097] Advantageously, at least one conduit 13' and 13'" is provided inside the valve stem 10, which extends along the rotation axis Y, is mechanically connected to the shut-off member 5, and is rotatable about the rotation axis Y. The at least one conduit 13' and 13'" fluidly communicate the first and second pressure taps 9' and 9'" with the measuring device 17.

[0098] Preferably, the valve stem 10 is provided with two different conduits 13' and 13" which are in fluid communication with the first pressure tap 9' and the second pressure tap 9" respectively. Preferably, the two conduits 13' and 13" are in fluid communication with ports 6' and 6" (if provided) or with orifice 23 respectively.

[0099] See attached Figure 6 The valve assembly 1 also includes a fixing structure 19 associated with the valve body 2. The fixing structure 19 includes a sleeve 14 in which the valve stem 10 is rotatably housed, the valve stem 10 being integrally rotated and linked with the closing element 5.

[0100] In this way, the valve assembly 1 of the present invention, in addition to having the function of cutting off and / or regulating fluid flow, also allows for the detection and measurement of the velocity and / or flow rate Q of the fluid passing through the valve assembly (described in detail below), and this function is essentially achieved within the overall size of the valve assembly itself, thereby avoiding the need to install additional sensors (such as dedicated flow meters) outside the valve assembly 1.

[0101] Therefore, valve assembly 1 can be used in existing and operating distribution equipment to replace existing valve assemblies without changing the geometry of the equipment and without additional space requirements, thereby allowing for the detection of the fluid's velocity and / or flow rate Q in addition to the function of cutting off and / or regulating fluid flow.

[0102] Conveniently, the measuring device 17 includes at least one pressure sensor, which is operatively connected, and in particular fluidly connected, to the first pressure tap 9' and the second pressure tap 9'.

[0103] Preferably, a first pressure sensor may be provided, which is operatively connected to a first pressure tap 9' to provide a signal representing the total pressure of the fluid.

[0104] Preferably, a second pressure sensor may be provided, which is operatively connected to the second pressure tap 9”, thereby providing a signal representing the hydrostatic pressure of the fluid.

[0105] Preferably, a differential pressure sensor may be provided, which is operatively connected to the first 9' and the second pressure tap 9', thereby providing a signal representing the dynamic pressure, i.e., the fluid pressure difference between the first and second pressure taps.

[0106] Preferably, the at least one pressure sensor is configured to generate a corresponding electrical signal at its output terminal, the electrical signal representing the fluid pressure extracted at the first pressure tap 9' and the second pressure tap 9" and / or the difference between them.

[0107] Preferably, the at least one pressure sensor includes a flow meter (e.g., a flow meter) operatively mounted on a bypass circuit that receives flow taken from the first pressure tap 9' and reintroduced into the second pressure tap 9'", thereby providing a signal of flow rate "q" representing the flow originating from the pressure difference between the first and second pressure taps.

[0108] Preferably, at least one sensor of the measuring device 17 is mounted outside the valve body 2, but it can also be mounted on the valve body 2.

[0109] The valve assembly 1 also includes an electronic processing unit 7, which is electrically connected to the measuring device 17 via a wired or wireless means, and configured to determine the velocity and / or flow rate Q of the fluid passing through the unit valve based on a quantity detected and / or determined by the measuring device 17. Specifically, the processing unit 7 is electrically connected to the at least one sensor and configured to receive from it a pressure value P representing the corresponding pressure value. T P sElectrical signals of dP and / or flow rate q. Preferably, the processing unit 7 is configured to determine the velocity and / or flow rate Q of the fluid (preferably circulating in a bypass loop) based on the pressure values ​​at the first pressure tap 9' and the second pressure tap 9" and / or directly based on their difference and / or based on the flow rate q of the fluid (preferably circulating in a bypass loop) originating from the pressure difference at the first pressure tap 9' and the second pressure tap 9".

[0110] Thus, valve assembly 1 is also suitable for determining the velocity and / or flow rate Q of the fluid passing through the valve, quickly, easily, and without requiring further sizing.

[0111] Preferably, the measuring device 17 and the electronic processing unit 7 are mounted on the same electronic board 18. Conveniently, in one possible embodiment, the measuring device 17 can be mounted on the valve body 2 and connected to the electronic processing unit 7 via wired or wireless means.

[0112] Conveniently, the electronic processing unit 7 can be installed on or near the valve body 2, or it can be provided at a remote location relative to the valve body 2.

[0113] Conveniently, the processing electronics unit 7 includes a microprocessor, a microcontroller, or a computer / processor. Advantageously, the electronics unit 7 can be externally mounted on the valve body 2, or it can be externally mounted and spaced apart from the valve body 2.

[0114] Conveniently, the same electronic unit that serves as the electronic processing unit 7 can also be configured to command the opening or closing movement of the closing element 5, or a separate and dedicated electronic unit can be provided for commanding the closing element.

[0115] Advantageously, the electronic processing unit 7 includes at least one computing module programmed to receive and process electrical signals from the pressure sensor to calculate the value of the velocity and / or flow rate Q of the fluid passing through the valve assembly 1.

[0116] Conveniently, the electronic processing unit 7 (and in particular its calculation module) is configured to base its calculations on the total pressure value P measured at the first pressure tap 9'. T The static pressure value P measured at the second pressure tap 9” s The electronic processing unit 7 (and particularly its calculation module) is configured to calculate the velocity and / or flow rate Q of the fluid flowing through at least one channel 2' of the valve assembly 1. Preferably, the electronic processing unit 7 (and particularly its calculation module) is configured to calculate the velocity and / or flow rate Q of the fluid flowing through channel 2' of the valve assembly 1 based on the difference dP between the total pressure measured at the first pressure tap 9' and the static pressure measured at the second pressure tap 9'".

[0117] Specifically, the calculation module determines the fluid velocity according to the following formula:

[0118]

[0119] Among them, P T The total pressure P is detected based on the contents extracted through the first pressure tap 9'. s The static pressure detected is based on the content extracted through the second pressure tap 9”, where ρ is the density of the fluid flowing through the valve body 1. Based on the fluid velocity value, the calculation module advantageously determines the flow rate value Q by multiplying this velocity value by the area of ​​the at least one channel 2’ through which the fluid flows. Conveniently, this method of indirectly calculating the velocity and / or flow rate Q from the total pressure and static pressure of the fluid utilizes a principle known per se as the “Pitot tube”.

[0120] Conveniently, the electronic processing unit 7 (and in particular its calculation module) is configured to calculate the value of the velocity and / or flow rate Q of the fluid flowing through the channel 2' of the valve assembly 1 based on the fluid flow rate q derived from the pressure difference between the first and second pressure taps (the fluid circulates in a bypass loop that receives the flow taken from the first pressure tap 9' and then reintroduced into the second pressure tap 9').

[0121] Advantageously, the electronic processing unit 7 also includes at least one communication module that receives the speed and / or flow value Q and sends it to an external device, or even a remote device, for monitoring and / or control purposes.

[0122] Preferably, the valve assembly 1 may include a sensor (not shown) for detecting and determining the density of fluid flowing through the valve. Preferably, such a density sensor may be mounted on the valve assembly 1, for example, it may be externally mounted on the shut-off element 5 and / or inside the fluid circuit 13 and / or in the first 6' and / or the second port element 6".

[0123] Preferably, the valve assembly 1 may include a further sensor (not shown) for detecting and determining the temperature of the fluid flowing through the valve. Preferably, such a temperature sensor may be mounted on the valve assembly 1, for example, it may be externally mounted on the shut-off element 5 and / or inside the fluid circuit 13 and / or in the first 6' and / or the second port element 6".

[0124] Preferably, the density sensor and / or the further temperature sensor are electrically connected to the measuring device 17 and / or the electronic processing unit 7 so as to simultaneously consider the fluid density and / or temperature when calculating the velocity and / or flow rate (Q) of the fluid passing through the valve assembly. Advantageously, this allows for the calculation of the fluid velocity and / or flow rate (Q) under reference thermodynamic conditions.

[0125] In another possible embodiment, the density sensor and / or the further temperature sensor are mounted outside the valve assembly 1, for example on the upstream pipe section T1 and / or the downstream pipe section T2, and they are electrically connected to the electronic processing unit 7 so as to simultaneously take into account the density and / or temperature of the fluid when calculating the velocity and / or flow rate (Q) of the fluid passing through the valve assembly.

[0126] Preferably, the valve assembly 1 includes a display module (not shown in the figures) (e.g., a display) for displaying measured and / or calculated values.

[0127] Preferably, the valve assembly 1 includes a storage module (not shown in the figures) for storing the detected and / or calculated measurements.

[0128] Advantageously, valve assembly 1 includes a transmission or transceiver module (not shown in the figures), preferably of wireless type, for remotely transmitting measured and / or calculated values.

[0129] Advantageously, the valve assembly 1 includes at least one power source for supplying power to the various components of the unit itself, and / or may include a power supply device for electrically connecting to an external power source for use with the components.

[0130] Conveniently, no valve disc (especially no calibration measuring disc) or other components are set or installed inside or on the closing element (5).

[0131] The present invention also relates to a fluid distribution device 100 comprising at least one valve assembly 1 having the type described to date in its basic and / or optional features. All the features described above regarding the valve assembly 1 should also be understood to refer to the distribution device 100 comprising at least one valve assembly 1.

[0132] Conveniently, the device 100 includes at least one distribution line 101, which includes a conduit through which fluid flows, particularly a combustible gas, but it may also be a liquid, such as water.

[0133] A distribution line 101 extends between an inlet section 102 and an outlet section 103, wherein at least one valve assembly 1 is preferably inserted. Preferably, the fluid entering the inlet section 102 is a high-pressure or medium-pressure fluid, and the fluid leaving the outlet section 103 is a low-pressure fluid, or in any case, its pressure is lower than the inlet pressure. For this purpose, the device 100 preferably includes at least one pressure reducing device 106 inserted between the inlet section 102 and the outlet section 103 for shutting off the line 101.

[0134] According to the preferred embodiment shown in the accompanying drawings, the distribution line 101 includes two parallel branches 105, 105' in which fluid flows. This allows the distribution equipment to be operated, for example during maintenance, by blocking one branch at a time without interrupting the fluid supply to downstream users.

[0135] Preferably, the device 100 includes at least one pressure reducing device 106 for each branch 105, 105', and advantageously, each branch 105, 105' is configured with at least two devices 106.

[0136] Conveniently, the device 100 also includes at least one filter 107, which is positioned to cut off the pipeline 101, and the device 100 preferably includes two filters 107, each filter 107 being positioned to cut off a corresponding branch 105, 105', and preferably arranged adjacent to the inlet section 102.

[0137] Preferably, the device 100 includes at least one valve assembly 1 of the type described above. Advantageously, the device 100 may include at least one valve assembly 1 positioned to cut off each branch 105, 105'. Advantageously, the device may include at least two valve assemblies 1, each valve assembly 1 positioned to cut off the corresponding branch 105, 105' near the inlet and / or outlet of that branch.

[0138] According to the appendix Figure 1 In the embodiment shown, the device includes four valve assemblies 1, wherein two valve assemblies 1 are positioned to cut off a first branch 105, and two valve assemblies 1 are arranged to cut off a second branch 105'. Advantageously, two valve assemblies are positioned to cut off the respective branches 105, 105' near the inlet of the branch, and two valve assemblies are positioned to cut off the respective branches 105, 105' near the outlet of the branch.

[0139] Preferably, the valve assembly 1 according to the invention can be used to replace conventional butterfly valves provided in gas distribution networks (especially in final pressure reducing units).

[0140] The present invention also relates to a method for measuring the velocity and / or flow rate Q of a fluid flowing in a device (preferably in a device for dispensing the fluid), characterized by using a valve assembly 1 as described above.

[0141] It can be clearly seen from the above that the valve assembly 1 according to the invention is particularly advantageous because:

[0142] - It allows for the measurement of fluid velocity and / or flow rate Q, while also allowing for the cutoff and / or regulation of fluid flow;

[0143] - It can be installed in any section of the gas distribution network, especially in the final pressure reduction unit;

[0144] - It has a small space footprint;

[0145] - This avoids the need to modify the assigned network geometry for its installation.

[0146] Specifically, unlike the solution in patent WO2014189395 (where only the static pressure upstream and downstream of a calibration measuring disc that can be specifically inserted into the ball valve's shut-off element is measured), the solution according to this invention provides a first pressure tap defining a total pressure tap, in addition to a second pressure tap defining a static pressure tap. Advantageously, furthermore, in the solution according to this invention, the pressure taps are directly mounted and / or defined on the shut-off element, and particularly, unlike the solution in WO2014189395, this invention avoids the installation and use of a dedicated component (i.e., a calibration measuring disc) that is mounted on the shut-off element and inevitably and undesirably reduces and / or obstructs the fluid passage cross-section through the valve, thereby limiting the maximum capacity of the valve and the mounting piping of the valve, and restricting its application to ball valves.

[0147] The present invention has been described and illustrated in some of its preferred embodiments, but it should be understood that implementation-level changes may be made in practice without departing from the scope of protection of this industrial invention patent.

Claims

1. A valve assembly (1) for fluid, comprising a valve body (2) and a shut-off element (5), the valve body (2) defining a fixed opening (20), the shut-off element (5) being actuated to be movable relative to the fixed opening (20) between at least one open state and a closed state, the shut-off element (5) defining at least one channel (2') for fluid to flow through the valve assembly (1) in the open state, and the shut-off element (5) blocking fluid flow through the valve assembly (1) in the closed state, the valve assembly (1) being characterized in that: the valve assembly (1) further comprises: - At least one first pressure tap (9'), the at least one first pressure tap (9') defining and / or mounted on the closing member (5) such that when the closing member (5) is in the at least one open state, the at least one first pressure tap (9') defines a total pressure tap. - At least one second pressure tap (9”), said at least one second pressure tap (9”) defining and / or mounted on the closure (5) and configured to define a static pressure tap, - Measuring device (17), which is operatively connected to the first pressure tap (9') and the second pressure tap (9") and configured to detect and / or determine at least one amount for calculating the velocity and / or flow rate (Q) of the fluid passing through the valve assembly (1), Furthermore, it is characterized in that: the second pressure tap (9”) includes a venturi tube (40), the venturi tube (40) being configured to increase velocity and reduce the pressure of the fluid entering the second pressure tap (9”), thereby reducing the static pressure (P) of the fluid. s ).

2. The valve assembly according to claim 1, characterized in that: The measuring device (17) is configured to detect and / or determine at least one of the following quantities: -The total pressure of the fluid (P) T ) and the static pressure (P) of the fluid s ), and / or - The pressure difference (dP) between the total pressure and the static pressure, and / or - The flow rate (Q) of the fluid originating from the pressure difference between the total pressure and the static pressure.

3. The valve assembly (1) according to one or more of the preceding claims, characterized in that: - The first pressure tap (9') includes a first port element (6') mechanically mounted on the closure (5) and in fluid communication with a fluid circuit (13), the fluid circuit (13) being at least partially formed inside the closure (5), and - The second pressure tap (9”) includes a second port element (6”) mechanically mounted on the closure (5) and in fluid communication with the fluid circuit (13), the fluid circuit (13) being at least partially formed inside the closure (5). Furthermore, the second port element (6”) is characterized in that: the second port element (6”) includes a venturi tube (40) configured to increase velocity and reduce the pressure of the fluid entering the second pressure tap (9”), thereby reducing the static pressure (P) of the fluid. s ).

4. The valve assembly (1) according to the preceding claim, characterized in that: The second port element (6”) is open at both ends, allowing incoming fluid to pass through the second port element (6”), and a channel is provided between the opposite ends of the second port element (6”) and downstream of the linear venturi tube (40) for fluid communication with a second inlet channel (46) of the fluid circuit (13) formed inside the closure (5).

5. The valve assembly (1) according to claim 3 or 4, characterized in that: The second port element (6”) including the venturi tube (40) is integrally defined with the first port element (6’) so that the second port element (6”) and the first port element (6’) are mounted together on the closure (5).

6. The valve assembly (1) according to one or more of the preceding claims, characterized in that: The valve assembly (1) includes a sensor for detecting and determining the density of fluid flowing through the valve, the sensor being electrically connected to the measuring device (17) and / or the electronic processing unit (7) to simultaneously take into account the density of the fluid detected and determined by the sensor when calculating the velocity and / or flow rate (Q) of the fluid passing through the valve assembly (1).

7. The valve assembly (1) according to one or more of the preceding claims, characterized in that: The valve assembly (1) includes a further sensor for detecting and determining the temperature of the fluid flowing through the valve, the further sensor being electrically connected to a measuring device (17) and / or an electronic processing unit (7) to simultaneously take into account the temperature of the fluid detected and determined by the further sensor when calculating the velocity and / or flow rate (Q) of the fluid passing through the valve assembly (1).

8. The valve assembly (1) according to one or more of the preceding claims, characterized in that: The first pressure tap (9') and the second pressure tap (9') are configured such that the shaft V1 extending orthogonally from the first pressure tap (9') has the same direction and orientation as the shaft V2 extending orthogonally from the second pressure tap (9').

9. The valve assembly (1) according to one or more of the preceding claims, characterized in that: The second port element (6”) including the linear venturi tube (40) is made as a single piece with the first port element (6’) so that they can be mounted together on the same closure (5).

10. The valve assembly (1) according to one or more of the preceding claims, characterized in that: The venturi tube (40) is located at the entrance of the second port element (6”).

11. The valve assembly (1) according to one or more of the preceding claims, characterized in that: The Venturi tube (40) is open at its end.

12. The valve assembly (1) according to one or more of the preceding claims, characterized in that: - The first port element (6') is configured to be in fluid communication only with the first inlet channel (45) of the fluid circuit (13), which is at least partially formed inside the closure element (5). - The second port element (6”) is open at both ends, allowing incoming fluid to pass through the second port element (6”), and a channel is provided between the opposite ends of the second port element (6”) for fluid communication with a second inlet channel (46) of a fluid circuit (13) at least partially formed inside the closure (5).

13. The valve assembly (1) according to one or more of the preceding claims, characterized in that: The Venturi tube (40) comprises, in sequence, a wider first inlet section (41), a converging second intermediate section (42), and a diverging third outlet section (43). - In the open state of the shut-off member (5), the first inlet section (41) of the venturi tube (40) is in fluid communication with the fluid inlet located upstream of the valve assembly (1), while the third outlet section (43) is in fluid communication with the fluid outlet located downstream of the valve assembly (1).

14. A fluid dispensing device, comprising: - At least one distribution line (101) extending between an input section (102) and an output section (103); And characterized in that: the fluid distribution device includes at least one valve assembly (1) according to one or more of the preceding claims, the valve assembly (1) being positioned to cut off the at least one distribution line (101).

15. A method for measuring the velocity and / or flow rate (Q) of a fluid flowing in a device, preferably in a distribution device for said fluid, characterized in that: Use the valve assembly (1) as described in one or more of claims 1 to 13.

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