Intelligent control valve structure based on ultrasonic gas meter

Abstract

The application discloses an intelligent control valve structure based on an ultrasonic gas meter, relates to the technical field of valves, and comprises a buffer section and a valve body section, the buffer section is connected with a measurement section, the valve body section is connected with the buffer section, a valve core is arranged in the valve body section and drives the valve core to act through a driver, and air inlets and outlets of the buffer section are respectively located on left and right sides of the valve body section. A flow channel is arranged in the valve body section, a buffer channel is in a communication state with the flow channel, and the valve core is located in the flow channel to control on-off of the flow channel. The control valve is cooperated with a variable volume cavity through a controllable buffer piece of the buffer section, and is supplemented with electromagnetic driving and air pressure regulation, so that gradual throttling and transient energy absorption of a valve opening and closing process are realized, so that transient disturbance and long-term indication deviation of ultrasonic metering caused by valve action are obviously reduced without obviously increasing pressure loss or leakage risk, and metering stability, action controllability and system safety are improved.

Description

Technical Field

[0001] This application relates to the field of valve technology, specifically to a smart control valve structure for ultrasonic gas meters. Background Technology

[0002] Ultrasonic gas meters calculate flow velocity and convert it into volume by measuring the time difference between the forward and reverse propagation of ultrasonic waves in a gas. They offer advantages such as having no moving parts and high long-term stability. To achieve remote gas shut-off and safety linkage, gas systems often incorporate control valves (solenoid valves, electric ball valves, etc.) on the metering pipeline. Traditionally, valves are often connected directly in parallel or series on the pipeline as single switching elements, or placed in upstream or downstream pipelines outside the measuring section. To meet on-site maintenance, space, and safety requirements, various implementation methods have emerged, including built-in valves, external valves, multi-channel parallel valve assemblies, and valve drive and control strategies with position feedback.

[0003] Ultrasonic metering is highly sensitive to flow field uniformity, turbulence intensity, echo interference, and transient pressure waves. Rapid valve opening and closing, branch redistribution, or sudden changes in valve body geometry can cause local turbulence, pulsation, and pressure transients, resulting in time difference measurement noise, zero drift, and low flow indication errors, which affect metering accuracy and billing fairness.

[0004] Announcement No. CN119197674A discloses an anti-turbulence valve and an ultrasonic gas meter employing the same valve. The anti-turbulence valve includes a valve body with a bent, extended flow path formed within it. This flow path connects to an inlet and an outlet. Gas entering through the inlet is buffered and rectified within the flow path before exiting through the outlet. A piston is installed within the flow path, which can be actuated by a drive unit to open or close the flow path. The ultrasonic gas meter includes a housing containing a metering module and the anti-turbulence valve. This design is reasonable, provides good anti-turbulence rectification, and improves measurement accuracy.

[0005] The main problems with existing technologies are: Flow field disturbances can lead to measurement errors. Turbulence, eccentric flow, and echoes generated near the measurement section by valves or branch pipes can change the ultrasonic propagation path and directly cause indication deviations.

[0006] Transient pressure waves and pulsations, rapid shutdowns, or asymmetrical switching of multiple channels can generate transient pressure waves (similar to the water hammer effect) and flow pulsations, leading to short-term signal loss or severe time difference fluctuations. Summary of the Invention

[0007] In view of this, the embodiments of this application aim to provide a smart control valve structure for ultrasonic gas meters, which reduces the transient disturbance and long-term indication deviation of ultrasonic metering caused by valve opening and closing without significantly increasing the system pressure loss and leakage risk.

[0008] To achieve the above objectives, the first aspect of this application provides: a smart control valve structure for an ultrasonic gas meter, including a buffer section and a valve body section, wherein the buffer section is connected to a measuring section, the valve body section is connected to the buffer section, and a valve core is provided inside the valve body section and driven to move by a driver.

[0009] The buffer section adopts a semi-enclosed connection to the valve body section, so that the air inlet and outlet of the buffer channel formed inside the buffer section are located on both sides of the valve body section, which can increase the bending radius of the gas flow path inside the buffer section, reduce the local resistance coefficient and secondary flow, thereby reducing the impact of turbulence and echo on ultrasonic measurement.

[0010] In some embodiments, the air inlet and outlet of the buffer section are located on the left and right sides of the valve body section, respectively. For example, the air inlet of the buffer section is located on the left side of one side of the valve body section, and the air outlet of the buffer section is located on the right side of the other side of the valve body section, further increasing the bending radius within a limited installation space.

[0011] In some embodiments, a flow channel is provided inside the valve body section, and the buffer channel is in communication with the flow channel. The valve core is located inside the flow channel to control the flow channel's on / off state. The valve core can be a quarter-turn ball core or a slide valve core, used to realize the on / off state or throttling of the main flow path. The valve body section and the buffer section are fixed by a semi-enclosed connector, and a sealing ring is provided at the connection to ensure low leakage.

[0012] In some embodiments, a buffer element is provided inside the buffer section and configured to switch between an open state and a closed state. When the buffer element is in the open state, it fits against the inner wall of the buffer section and does not affect the flow of gas. When the buffer element is in the closed state, it seals the buffer channel.

[0013] In some embodiments, the buffer also has a buffer state, in which the buffer channel is in a partially closed state and can produce a certain amount of deformation under the action of gas pressure.

[0014] In some embodiments, the buffer section is provided with at least a buffer member section with a trapezoidal cross section, and the buffer member is installed on the long side. The buffer member includes at least one buffer sheet, which is provided along a first direction and can be tilted in a second direction. A recess that matches the shape of the buffer sheet is provided on the inner side of the buffer channel. When the buffer sheet is in the open state, it enters the recess, and the outer wall and the inner wall of the buffer channel are in the same plane.

[0015] In some embodiments, the first direction intersects with the second direction, and a buffer angle α is formed between the buffer sheet and the first direction. The buffer angle α is set between 0° and 48°. When the buffer sheet is at 48°, it is in a closed state, and when the buffer sheet is at 0°, it is in an open state.

[0016] In some embodiments, a magnetic plate is embedded in the side of the buffer sheet away from the buffer channel, and a first control element is provided in the buffer channel to cooperate with the magnetic plate. By controlling the magnetic plate, the buffer angle α of the buffer sheet can be adjusted between 0° and 48° to decelerate the gas flow.

[0017] In some embodiments, the first control element includes at least a first electromagnet and a second electromagnet. Both the first electromagnet and the second electromagnet are embedded in the buffer channel and cooperate with the magnetic plate. When the first electromagnet is powered on, it attracts the magnetic plate, causing the buffer sheet to enter the recess and be positioned along a first direction. When the second electromagnet is powered on, it attracts the magnetic plate, causing the buffer sheet to tilt and swing in a second direction.

[0018] In some embodiments, the trapezoidal cross-section causes a relative increase in flow velocity at the short side. The tilting of the long-side buffer reduces the effective channel and guides the flow towards the short side, thereby lowering the Reynolds number in the main flow region and weakening large-scale eddies. As the buffer transitions from a parallel to a tilted state, the channel area gradually decreases, resulting in gradual throttling and energy absorption.

[0019] In some embodiments, the buffer sheet is made of an elastic material. The tiltable and deformable buffer sheet absorbs transient kinetic energy and slows down changes in flow velocity. It can reduce turbulence intensity and pressure pulsation when the valve is closed rapidly, thereby reducing disturbance at the ultrasonic metering end.

[0020] In some embodiments, the buffer sheet is installed on the inner long side of the buffer section. Normally, it fits the pit and does not affect the flow. During operation, it tilts at a set angle to enter the buffer state to gradually reduce the effective channel.

[0021] In some embodiments, a limiting structure is provided inside the buffer section. The limiting structure cooperates with the buffer sheet to ensure that the buffer sheet is always in an unfolded state when the buffer angle α is changed, thus preventing the buffer sheet from bending.

[0022] In some embodiments, the buffer channel and the limiting structure are integrally formed, and the buffer sheet is at least one side of the limiting structure, and the extension path of the limiting structure coincides with the swing path of the buffer sheet.

[0023] In some embodiments, a limiting structure is used to limit the buffer sheet, so that the buffer sheet is always in the unfolded state, ensuring that the buffer sheet can stably seal the buffer channel at 48°, and using magnetic force as the elastic drive of the buffer sheet, so that the buffer sheet can tilt controllably and absorb transient energy when the control valve is activated.

[0024] In another embodiment, the portion of the buffer channel where the buffer element is located can also be square, which can be designed by those skilled in the art.

[0025] In some embodiments, a cavity is formed inside the valve body section, and the flow channel is divided into a first channel and a second channel in the cavity. The first channel is connected to the buffer channel, the second channel is connected to the first channel, and the cavity is connected to the first channel and the second channel.

[0026] In some embodiments, the cavity is a variable volume cavity, which is connected to a buffer channel through a first channel. The second control element includes a diaphragm disposed at the connection between the cavity and the flow channel. The cavity and the flow channel are sealed with a support through the diaphragm and can be opened or closed in a controlled manner to achieve transient energy absorption or release. Under the support of the support, the diaphragm adheres to the inner wall of the cavity to seal the cavity.

[0027] In some embodiments, the support includes a mounting portion, a pressure plate, a spring, and an electromagnetic ring. The mounting portion is installed inside the cavity and connected to the inner wall of the cavity. The pressure plate is embedded inside the diaphragm. The spring is disposed between the pressure plate and the mounting portion, with both ends of the spring extending to the inner sides of the pressure plate and the mounting portion, respectively. Here, the mounting portion, pressure plate, spring, and diaphragm are coaxial.

[0028] In some embodiments, the diaphragm is attached to the inner wall of the cavity at an inclined surface, and the diaphragm is elastic, so that it is in stable contact with the inner wall of the cavity under the squeezing action of the pressure plate.

[0029] In some embodiments, a sealed cavity is formed between the diaphragm and the pressure plate. When the spring supports the pressure plate to make the diaphragm fit against the inner wall of the cavity, the cavity is squeezed. Under the action of the pressure inside the cavity, the diaphragm stably contacts the inner wall of the cavity.

[0030] In some embodiments, the electromagnetic ring is embedded inside the mounting portion or inside the cavity. After being energized, the electromagnetic ring can magnetically attract the pressure plate. At this time, the spring is compressed, and the cavity and the flow channel are in a connected state.

[0031] In some embodiments, a partition is provided inside the cavity to divide the cavity into an inner cavity and an outer cavity. A support member and a diaphragm are provided in the outer cavity. A sealing ring is sleeved on the outside of the partition and is made to make stable contact with the inner wall of the cavity. The cooperation between the partition and the sealing ring ensures the isolation stability between the inner cavity and the outer cavity.

[0032] In some embodiments, a slide is formed on the inner wall of the cavity, and the sealing ring is squeezed into the inner wall of the slide and comes into contact with the inner wall of the slide.

[0033] In some embodiments, an air pressure regulator is provided in the inner cavity. The air pressure regulator is installed on the outside of the valve body section. The air pressure in the inner cavity is adjusted by the air pressure regulator, thereby changing the position of the baffle. When the cavity needs to absorb some gas to avoid turbulence, the volume of the inner cavity can be reduced by changing the air pressure, so that the outer cavity can accommodate more gas.

[0034] The control valve of this application achieves gradual throttling and transient energy absorption during the valve opening and closing process through the coordinated action of a controllable buffer plate in the buffer section and a variable volume cavity, supplemented by electromagnetic drive and air pressure regulation. This significantly reduces the transient disturbance and long-term indication deviation of the ultrasonic metering caused by the valve action without significantly increasing the risk of pressure loss or leakage, thereby improving the metering stability, action controllability and system safety.

[0035] The buffer plate achieves gradual throttling and energy dissipation through controllable tilting and elastic deformation: under normal conditions, it fits the indentation without affecting the flow; during pre-buffering or valve closing, it gradually narrows the effective channel according to the set angle, absorbing transient kinetic energy and slowing down the change in flow velocity, thereby weakening turbulence, suppressing large-scale vortex and echo interference, and reducing the transient disturbance and indication fluctuation of ultrasonic metering caused by rapid valve action; the limiting structure and magnetic control drive ensure the reliability of buffer plate deployment, sealing and repeated action.

[0036] The cavity serves as a variable-volume energy storage and buffer unit, achieving controlled opening and closing through a diaphragm, spring-pressure plate, and electromagnetic ring: when the valve is closed, it absorbs excess gas energy and buffers pressure peaks; when the valve is opened, it releases energy according to a strategy to balance the flow field. External gas pressure regulation can change the initial volume and stiffness to adapt to the working conditions. The cooperation of the diaphragm, sealing ring, and slide ensures the sealing and stability of the cavity during energy absorption and release, thereby further reducing the impact of transient pressure waves on the metering module and improving the system's controllability.

[0037] Other features and advantages of this application will be set forth in the following description, and in part will be apparent from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0038] Figure 1 This is a structural diagram of the present application; Figure 2 This is a schematic diagram of the buffer section structure of this application; Figure 3 This is a partial structural diagram of the buffer section in this application; Figure 4 This is a plan view of the buffer structure of this application; Figure 5 This is a schematic diagram of the buffer sheet structure of this application; Figure 6 This is a schematic diagram of the valve body section structure of this application; Figure 7 This is a plan view of the flow channel structure in this application; Figure 8 This is a schematic diagram of the structure of the second control component in this application; Figure 9 This is a schematic diagram of the support structure of this application; Figure 10 This is a plan view of the support structure of this application; Figure 11 This is a schematic diagram of the diaphragm and sealing ring structure of this application.

[0039] In the diagram: 100 valve body section, 200 buffer section, 300 valve core, 400 flow channel, 500 buffer channel, 600 actuator; 10 Buffer component, 20 Cavity, 30 First control component, 40 Second control component; 111 Buffer plate, 112 Magnetic plate, 113 Limiting structure; 310 First electromagnet, 311 Second electromagnet; 410 Diaphragm, 411 Support component, 412 Partition plate, 413 Sealing ring, 414 Slide rail, 415 Pressure regulating component; 41 Mounting part, 42 Pressure plate, 43 Spring, 44 Electromagnetic ring. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0045] In existing technologies, ultrasonic gas meters calculate flow velocity and convert it into volume by measuring the time difference between the forward and reverse propagation of ultrasonic waves in a gas. This method has the advantages of having no moving parts and high long-term stability. To achieve remote gas shut-off and safety linkage, gas systems often install control valves (solenoid valves, electric ball valves, etc.) on the metering pipeline.

[0046] Ultrasonic metering is highly sensitive to flow field uniformity, turbulence intensity, echo interference, and transient pressure waves. Rapid valve opening and closing, branch redistribution, or sudden changes in valve body geometry can cause local turbulence, pulsation, and pressure transients, resulting in time difference measurement noise, zero drift, and low flow indication errors, which affect the accuracy of metering and the fairness of billing.

[0047] The control valve is usually integrated inside the ultrasonic gas valve, but because the control valve is close to the measuring section, the following issues arise: Flow field disturbances can lead to measurement errors. Turbulence, eccentric flow, and echoes generated near the measurement section by valves or branch pipes can change the ultrasonic propagation path and directly cause indication deviations.

[0048] Transient pressure waves and pulsations, rapid shutdowns, or asymmetrical switching of multiple channels can generate transient pressure waves (similar to the water hammer effect) and flow pulsations, leading to short-term signal loss or severe time difference fluctuations.

[0049] To address the aforementioned problems, this application provides an intelligent control valve structure for ultrasonic gas meters, see reference. Figure 1-11 As shown, it includes a buffer section 200 and a valve body section 100. The buffer section 200 is connected to the measuring section, and the valve body section 100 is connected to the buffer section 200. A valve core 300 is provided inside the valve body section 100 and is driven to move by the driver 600.

[0050] The buffer section 200 adopts a semi-enclosed connection to the valve body section 100, so that the air inlet and outlet of the buffer channel 500 formed inside the buffer section 200 are located on both sides of the valve body section 100, which can increase the bending radius of the gas flow path inside the buffer section 200, reduce the local resistance coefficient and secondary flow, thereby reducing the influence of turbulence and echo on ultrasonic measurement.

[0051] Furthermore, the air inlet and outlet of the buffer section 200 are located on the left and right sides of the valve body section 100, respectively. For example, the air inlet of the buffer section 200 is located on the left side of one side of the valve body section 100, and the air outlet of the buffer section 200 is located on the right side of the other side of the valve body section 100, further increasing the bending radius within the limited installation space.

[0052] The semi-enclosed buffer section 200 design increases the flow bending radius and reduces the local drag coefficient, thus improving the anti-turbulence effect without significantly increasing the system pressure loss or leakage risk.

[0053] The valve body section 100 is internally provided with a flow channel 400, see reference. Figure 6-7 As shown, the buffer channel 500 and the flow channel 400 are in a connected state, and the valve core 300 is located inside the flow channel 400 to control the flow channel 400. The valve core 300 can be a quarter-turn ball core or a slide valve type valve core 300, used to realize the opening and closing or throttling of the main flow path. The valve body section 100 and the buffer section 200 are fixed by a semi-enclosed connector, and a sealing ring is provided at the connection to ensure low leakage.

[0054] In some embodiments, see Figure 2-5 As shown, a buffer member 10 is provided inside the buffer section 200, and the buffer member 10 is configured to switch between an open state and a closed state. When the buffer member 10 is in the open state, it fits against the inner wall of the buffer section 200 and will not affect the flow of gas. When the buffer member 10 is in the closed state, it seals the buffer channel 500.

[0055] Furthermore, the buffer 10 also has a buffer state, in which the buffer channel 500 is in a partially closed state and can produce a certain amount of deformation under the action of gas pressure.

[0056] The buffer section 200 is provided with at least one buffer member 10, the cross section of which is trapezoidal, and the buffer member 10 is installed on the long side. The buffer member 10 includes at least one buffer piece 111. The buffer piece 111 is arranged along the first direction and can be tilted in the second direction. The inner side of the buffer channel 500 is provided with a recess that matches the shape of the buffer piece 111. When the buffer piece 111 is in the open state, it enters the recess, and its outer wall is in the same plane as the inner wall of the buffer channel 500.

[0057] The first direction intersects with the second direction, and the buffer plate 111 forms a buffer angle α with the first direction. The buffer angle α is set between 0° and 48°. When the buffer plate 111 is at 48°, it is in a closed state, and when the buffer plate 111 is at 0°, it is in an open state.

[0058] A magnetic plate 112 is embedded in the side of the buffer plate 111 away from the buffer channel 500, and a first control element 30 is provided in the buffer channel 500 to cooperate with the magnetic plate 112. By controlling the magnetic plate 112, the buffer angle α of the buffer plate 111 can be adjusted between 0° and 48° to decelerate the flow of gas.

[0059] In some embodiments, the first control element 30 includes at least a first electromagnet 310 and a second electromagnet 311. Both the first electromagnet 310 and the second electromagnet 311 are embedded in the buffer channel 500 and cooperate with the magnetic plate 112. When the first electromagnet 310 is powered on, it attracts the magnetic plate 112, causing the buffer piece 111 to enter the recess and be positioned along the first direction. When the second electromagnet 311 is powered on, it attracts the magnetic plate 112, causing the buffer piece 111 to tilt and swing in the second direction.

[0060] The trapezoidal cross-section causes a relative increase in flow velocity at the short side. When the long-side buffer plate 111 is tilted, it reduces the effective channel and guides the flow towards the short side, which can reduce the Reynolds number in the mainstream region and weaken large-scale eddies. As the buffer plate 111 transitions from a parallel state to an tilted state, the channel area gradually decreases, resulting in gradual throttling and energy absorption.

[0061] Among them, the buffer plate 111 is made of elastic material. The tiltable and deformable buffer plate 111 absorbs transient kinetic energy and delays the change in flow velocity. It can reduce the turbulence intensity and pressure pulsation when the valve is quickly closed, thereby reducing the disturbance at the ultrasonic metering end.

[0062] The buffer plate 111 is installed on the inner long side of the buffer section 200. Normally, it fits the pit and does not affect the flow. When in operation, it tilts at a set angle to enter the buffer state to gradually reduce the effective channel.

[0063] Since the buffer sheet 111 is made of elastic material, in order to prevent the buffer sheet 111 from bending and failing to fully fit the inner wall of the buffer channel 500, a limiting structure 113 is provided inside the buffer section 200. The limiting structure 113 cooperates with the buffer sheet 111 so that the buffer sheet 111 can always be in the unfolded state when the buffer angle α is changed, thus preventing the buffer sheet 111 from bending.

[0064] The buffer channel 500 is integrally formed with the limiting structure 113, and the buffer piece 111 is at least attached to one side of the limiting structure 113. The extension path of the limiting structure 113 coincides with the swing path of the buffer piece 111.

[0065] The buffer plate 111 is limited by the limiting structure 113, so that the buffer plate 111 is always in the unfolded state, ensuring that the buffer plate 111 can stably seal the buffer channel 500 at 48°. Furthermore, the magnetic force is used as the elastic drive of the buffer plate 111, so that the buffer plate 111 can be tilted controllably and absorb transient energy when the control valve is activated.

[0066] The buffer plate 111 is designed with a gradually converging channel area from opening to closing, which allows energy to be dissipated in a controllable manner, reduces the impact caused by valve shutdown, and protects the downstream metering module and pipeline structure.

[0067] In another embodiment, the portion of the buffer channel 500 where the buffer member 10 is located can also be square, which can be configured by those skilled in the art.

[0068] In some embodiments, see Figure 8-11 As shown, a cavity 20 is opened inside the valve body section 100. The flow channel 400 is divided into a first channel and a second channel at the cavity 20. The first channel is connected to the buffer channel 500, and the second channel is connected to the first channel. The cavity 20 is connected to the first channel and the second channel.

[0069] The cavity 20 is a variable volume cavity 20. The cavity 20 is connected to the buffer channel 500 through the first channel. The second control component 40 includes a diaphragm 410 disposed at the connection between the cavity 20 and the flow channel 400. The cavity 20 and the flow channel 400 are sealed with the support component 411 through the diaphragm 410 and can be opened or closed in a controlled manner to achieve transient energy absorption or release. Under the support of the support component 411, the diaphragm 410 adheres to the inner wall of the cavity 20 to seal the cavity 20.

[0070] The support member 411 includes a mounting part 41, a pressure plate 42, a spring 43, and an electromagnetic ring 44. The mounting part 41 is installed inside the cavity 20 and connected to the inner wall of the cavity 20. The pressure plate 42 is embedded inside the diaphragm 410. The spring 43 is disposed between the pressure plate 42 and the mounting part 41, and both ends of the spring 43 extend to the inner sides of the pressure plate 42 and the mounting part 41, respectively. Here, the mounting part 41, the pressure plate 42, the spring 43, and the diaphragm 410 are coaxial.

[0071] The diaphragm 410 is attached to the inner wall of the cavity 20 at an inclined surface, and the diaphragm 410 has elasticity, so it is in stable contact with the inner wall of the cavity 20 under the squeezing action of the pressure plate 42.

[0072] Furthermore, a sealed cavity is formed between the diaphragm 410 and the pressure plate 42. When the spring 43 supports the pressure plate 42 to make the diaphragm 410 adhere to the inner wall of the cavity 20, the cavity is squeezed. Under the action of the pressure inside the cavity, the diaphragm 410 stably contacts the inner wall of the cavity 20.

[0073] The flow field rectification of the buffer section 200 and the energy absorption of the cavity 20 reduce the interference of echoes, eccentric flows and large-scale vortices on the ultrasonic propagation path, which is conducive to maintaining long-term metrological stability and indication accuracy.

[0074] The electromagnetic ring 44 is embedded inside the mounting part 41 or inside the cavity 20. After being energized, the electromagnetic ring 44 can magnetically attract the pressure plate 42. At this time, the spring 43 is compressed, and the cavity 20 and the flow channel 400 are in a connected state.

[0075] The electromagnetically controlled buffer plate 111, the variable volume cavity 20 driven by the electromagnetic ring 44, and the external air pressure regulator 415 together constitute a programmable buffering and energy absorption strategy, which can adjust the pre-buffering angle, valve closing curve and cavity 20 volume according to the working conditions to optimize performance.

[0076] The cavity 20 is divided into an inner cavity and an outer cavity by a partition 412. The support 411 and the diaphragm 410 are located in the outer cavity. A sealing ring 413 is sleeved on the outside of the partition 412, and the sealing ring 413 is in stable contact with the inner wall of the cavity 20. The cooperation between the partition 412 and the sealing ring 413 ensures the isolation stability between the inner cavity and the outer cavity.

[0077] In this cavity 20, a slide 414 is formed on the inner wall, and the sealing ring 413 is squeezed into the inner wall of the slide 414 and comes into contact with the inner wall of the slide 414. The slide 414 can limit the sliding distance of the partition 412, and further, it can also prevent the partition 412 from flipping inside the cavity 20, causing the inner cavity and the outer cavity to communicate.

[0078] An air pressure regulator 415 is installed in the inner cavity. The air pressure regulator 415 is installed on the outside of the valve body section 100. The air pressure in the inner cavity is adjusted by the air pressure regulator 415, thereby changing the position of the baffle 412. When the cavity 20 needs to absorb some gas to avoid turbulence, the volume of the inner cavity can be reduced by changing the air pressure, so that the outer cavity can accommodate more gas.

[0079] The buffer plate 111 works in conjunction with the variable volume cavity 20 to achieve progressive throttling and energy absorption when the valve moves rapidly, significantly reducing transient pressure waves and turbulent pulsations, thereby reducing short-term fluctuations and signal loss in ultrasonic time difference measurements.

[0080] After receiving the valve closing command: Pre-buffering phase: First, trigger buffer plate 111 to switch to the predetermined buffer angle α (driven by electromagnet according to the curve), and wait for confirmation (50–200 ms).

[0081] Main valve soft shut-off: After the buffer plate 111 is confirmed to be in position, the valve core 300 closes according to the preset speed limit curve (e.g., linear or exponential deceleration curve), while the cavity 20 opens or remains open according to the strategy to absorb transient energy.

[0082] Playback and Reset: After the valve is closed, the cavity 20 is in a closed state. After the valve is opened again, the gas is released at a predetermined rate, and the buffer plate 111 is reset to the open state to restore normal metering.

[0083] The control logic of pre-buffering-main valve soft shutdown-replay reset enables the valve action to be executed in a controlled manner according to the time curve, which facilitates integration with the upper control system and achieves a smoother gas cut-off / re-gas process.

[0084] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein.

Claims

1. A smart control valve structure for an ultrasonic gas meter, characterized in that, include: Valve body section (100), with flow channel (400) formed inside; A valve core (300) is disposed within the valve body section (100) and is used to control the on / off state of the flow channel (400); A buffer section (200) is provided with a buffer channel (500), which is connected to the flow channel (400). A buffer element (10) is provided in the buffer channel (500). At least one cavity (20), wherein at least one of the cavities (20) is disposed inside the valve body section (100); The first control element (30) and the second control element (40) are respectively disposed inside the buffer section (200) and the valve body section (100) so that the buffer element (10) and the cavity (20) can switch between at least the open state and the closed state; When the buffer (10) is in the open state, the cavity (20) is in the closed state; when the buffer (10) is in the closed state, the cavity (20) is in the open state.

2. The intelligent control valve structure for an ultrasonic gas meter according to claim 1, characterized in that, The buffer (10) includes a buffer sheet (111) arranged along a first direction. When the buffer sheet (111) is arranged along the first direction, it is embedded in the inner wall of the buffer section (200). A magnetic plate (112) is embedded inside the buffer sheet (111). The first control member (30) cooperates with the magnetic plate (112) to enable the buffer sheet (111) to tilt from the first direction to the second direction. The buffer sheet (111) and the first direction form a buffer angle α, which is 0°-48°.

3. The intelligent control valve structure for an ultrasonic gas meter according to claim 2, characterized in that, The first control element (30) includes a first electromagnet (310) and a second electromagnet (311) embedded inside the buffer section (200). When the first electromagnet (310) magnetically attracts the magnetic plate (112), the buffer element (10) is embedded in the buffer section (200) and arranged in a first direction. When the second electromagnet (311) magnetically attracts the magnetic plate (112), the buffer element (10) is disengaged from the buffer channel (500) and tilts in a second direction.

4. The intelligent control valve structure for an ultrasonic gas meter according to claim 3, characterized in that, The buffer section (200) is provided with a limiting structure (113) inside. The limiting structure (113) cooperates with the buffer sheet (111), and the buffer sheet (111) is at least in contact with one side of the limiting structure (113) so that the buffer sheet (111) is always in the unfolded state.

5. The intelligent control valve structure for an ultrasonic gas meter according to claim 1, characterized in that, An actuator (600) is provided on the outside of the valve body. The actuator (600) is connected to the valve core (300). The valve core (300) controls the opening and closing of the flow channel (400) under the drive of the actuator (600).

6. The intelligent control valve structure for an ultrasonic gas meter according to claim 1, characterized in that, The cavity (20) is opened inside the valve body section (100) and communicates with the flow channel (400). The second control element (40) includes a diaphragm (410) disposed at the communication between the cavity (20) and the flow channel (400). When the diaphragm (410) is in the closed state, it seals the cavity (20). When the diaphragm (410) is in the open state, the cavity (20) communicates with the flow channel (400). The diaphragm (410) is provided with a support member (411) on its inner side, and the support member (411) supports the diaphragm (410) in a normally closed state.

7. The intelligent control valve structure for an ultrasonic gas meter according to claim 6, characterized in that, The support member (411) includes a mounting part (41), a pressure plate (42), a spring (43), and an electromagnetic ring (44). The pressure plate (42) is embedded inside the diaphragm (410), the mounting part (41) is connected to the inner wall of the cavity (20), and the spring (43) is embedded between the mounting part (41) and the pressure plate (42). The mounting part (41), pressure plate (42), diaphragm (410) and spring (43) are coaxially arranged. The electromagnetic ring (44) is embedded in the inner side of the mounting part (41) or inside the cavity (20). The electromagnetic ring (44) can magnetically attract the pressure plate (42) so that the cavity (20) is in an open state.

8. A smart control valve structure for an ultrasonic gas meter according to claim 6 or 7, characterized in that, A partition (412) is provided inside the cavity (20), and a sealing ring (413) is provided on the outside of the partition (412). The partition (412) is coaxial with the cavity (20) and can slide along part of the cavity (20) axially. The cavity (20) is provided with a slide (414), the sealing ring (413) is squeezed to contact the inner wall of the slide (414), and the slide (414) restricts the sliding distance of the partition (412).

9. The intelligent control valve structure for an ultrasonic gas meter according to claim 8, characterized in that, The valve body section (100) is equipped with a pressure regulating component (415), which is connected to the cavity (20) and changes the position of the pressure regulating diaphragm (412) inside the cavity (20).

10. The intelligent control valve structure for an ultrasonic gas meter according to claim 1, characterized in that, The air inlet and outlet of the buffer section (200) are respectively located on both sides of the valve body section (100), and the air outlet of the buffer section (200) is connected to the flow channel (400).

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