Flow-measurable half ball valve

Abstract

This invention provides a flow-measuring hemispherical valve, relating to the field of ball valve technology, comprising a valve body; a flow measurement unit including a calculation unit and a probe, wherein the probe has two opposing sides along the axial direction of the valve body; two non-communicating detection channels are provided inside the probe along the axial direction of the probe, with the ends of the two detection channels located on the two side surfaces; two pressure sensors are configured at one end of the probe extending out of the valve body, the pressure sensors being used to detect the fluid pressure in the two detection channels respectively; the calculation unit is used to obtain the detection values ​​of the two pressure sensors to calculate the fluid velocity V inside the valve body. The flow measurement probe is directly integrated into the valve plate inlet side of the hemispherical valve, realizing the integrated design of the valve and the flow measurement structure. At the same time, a differential pressure measurement principle is adopted, using the pressure difference between the opposing sides of the probe end to calculate the flow velocity, adapting to the flow channel characteristics inside the valve body; improving the stability of pressure difference detection.

Description

Technical Field

[0001] This invention relates to the field of ball valve technology, and more particularly to a flow-measuring hemispherical valve. Background Technology

[0002] In industrial and municipal pipeline transportation fields such as water supply and drainage, and sewage treatment, the cutoff, flow regulation, and flow metering of pipeline media are core operational requirements. Currently, the industry commonly uses a split configuration of valves and independent flow meters to achieve these functions. Commonly used independent flow meters include electromagnetic flow meters and ultrasonic flow meters. However, this traditional configuration and flow meter have many technical defects and application pain points in practical applications, as follows: 1. Poor media adaptability Electromagnetic flow meters experience a significant decrease in measurement stability when the medium contains air bubbles; ultrasonic flow meters are significantly affected by sediment and impurities in the water, and cannot be used normally when the liquid contains air bubbles. Both are unsuitable for metering complex media such as municipal sewage, sandy water, and gas-containing water.

[0003] 2. Limited range ratio The conventional range ratio of electromagnetic flowmeters to ultrasonic flowmeters is only 1:10, which cannot meet the accurate metering requirements in scenarios with large fluctuations in pipeline flow, and is not adaptable to low flow and variable flow conditions.

[0004] 3. Weak anti-interference ability Both types of flow meters are susceptible to external environmental interference, and vibration can severely affect their measurement stability, making them unsuitable for applications with significant pipeline vibration. Furthermore, electromagnetic flow meters must be kept away from electromagnetic radiation equipment such as motors and transformers; ultrasonic flow meters experience a significant decrease in measurement stability in high-noise environments, and their on-site installation faces numerous environmental limitations.

[0005] 4. High maintenance difficulty and cost While electromagnetic flow meters have a low failure rate, maintenance requires water outages and pipe disassembly, disrupting pipeline transport and impacting production and municipal operations. Ultrasonic flow meters, on the other hand, have a high failure rate and require frequent maintenance. Furthermore, maintenance of pipeline-installed ultrasonic flow meters also necessitates water outages, resulting in higher time and economic costs for subsequent maintenance.

[0006] In summary, existing pipeline media transportation and metering technologies suffer from inherent flaws in the separate design of valves and flow meters, as well as issues with the flow meters themselves regarding adaptability, installation, maintenance, and stability. This results in poor overall system economy, practicality, and adaptability. The industry urgently needs a device that can integrate media cutoff regulation with accurate flow metering. Summary of the Invention

[0007] The purpose of this invention is to solve the above-mentioned problems by providing a flow-measuring hemispherical valve.

[0008] To achieve the above objectives, the technical solution of the present invention is: a flow-measuring hemispherical valve, comprising: The valve body has a valve disc that rotates internally; The flow measurement unit includes a calculation unit and a probe disposed on the inlet side of the valve plate near the valve body. The axis of the probe is perpendicular to the axis of the valve body. Along the axial direction of the valve body, the end of the probe includes two opposing sides. Along the axial direction of the probe, two non-communicating detection channels are disposed inside the probe, and the ends of the two detection channels are disposed on the two side surfaces. Two pressure sensors are disposed at one end of the probe extending out of the valve body. The pressure sensors are used to detect the fluid pressure in the two detection channels respectively. The calculation unit is used to obtain the detection values ​​of the two pressure sensors to calculate the fluid velocity V in the valve body.

[0009] Furthermore, the flow measurement unit also includes a distribution valve body connected to the probe end, the distribution valve body having a distribution valve channel communicating with the two detection channels respectively, and the two pressure sensors being connected to the two distribution valve channels respectively.

[0010] Furthermore, it also includes a shut-off valve, the two ends of which are connected to two distribution valve channels respectively, and the shut-off valve can switch between shut-off and connected states.

[0011] Furthermore, the valve body is provided with a mounting base, the probe is integrally provided with a connector that connects to the mounting base, and the mounting base is provided with a columnar channel; It also includes a cleaning assembly, which includes a telescopic cylinder that engages with the columnar channel guide and a cleaning head disposed at the end of the telescopic cylinder, the cleaning head being sleeved outside the probe.

[0012] Furthermore, the connector is sealed to the end of the columnar channel, and the other end of the columnar channel is sealed with an end plug, which is sealed to the guide of the telescopic cylinder. The columnar channel has an opening at one end near the end plug, and the valve body also has a channel connecting the opening and the valve body outlet. It also includes an elastic element that provides the telescopic cylinder with movement toward the end plug, and there is an annular space between the outer circumferential surface of the telescopic cylinder and the cylindrical channel. A piston that guides and cooperates with the cylindrical channel is provided at the end of the telescopic cylinder away from the end plug.

[0013] Furthermore, a limiting surface is provided on the end face of the end plug, and the limiting surface has an initial position; When the piston comes into contact with the limit of the initial position, the first surface of the piston is located on the side of the port that is far away from the end plug. The first surface is the side of the piston that is far away from the end plug.

[0014] Furthermore, an annular elastic pad is provided on the end plug, and the outer peripheral surface of the elastic pad is spaced apart from the side wall of the columnar channel. It also includes a fluid medium supply unit, and the connector is provided with a branch line three that connects the fluid medium supply unit and the columnar channel, and a three-way switching valve is provided on the branch line three.

[0015] Furthermore, the limiting surface is the end face of the elastic pad, and the limiting surface has a second position when the elastic pad is compressed. When the piston contacts the elastic pad in the second position, at least a portion of the opening is located on the side of the first surface away from the end plug.

[0016] Furthermore, the distribution valve body is also equipped with two ports 2 that are respectively connected to the two distribution valve channels. The two ports 2 are respectively equipped with branch line 1 and branch line 2 that are connected to the flowing medium supply unit. Solenoid valves are installed on both branch line 1 and branch line 2.

[0017] Furthermore, when the piston abuts against the limiting surface, the cleaning head is in a state that surrounds the end of the probe.

[0018] Compared with existing technologies, the flow-measuring hemispherical valve disclosed in this invention has the following advantages: the flow measurement probe is directly integrated into the inlet side of the valve plate of the hemispherical valve, realizing the integrated design of the valve and the flow measurement structure. At the same time, it adopts the differential pressure measurement principle, using the pressure difference between the two opposite sides of the probe tip to calculate the flow velocity, adapting to the flow channel characteristics inside the valve body; improving the stability of pressure difference detection, and adapting to the flow velocity calculation of different media such as water, raw water, and sewage, effectively improving media adaptability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a flow-measuring hemispherical valve according to the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of a concealed drive device for a flow-measuring hemispherical valve according to the present invention. Figure 1 .

[0021] Figure 3 This is a side view of the concealed drive device, pressure sensor, and calculation display instrument for a flow-measuring hemispherical valve according to the present invention.

[0022] Figure 4 for Figure 3 The diagram shows a cross-sectional view of the present invention at point AA.

[0023] Figure 5 This is a schematic diagram of the structure of a concealed drive device for a flow-measuring hemispherical valve according to the present invention. Figure 2 .

[0024] Figure 6 for Figure 4 The diagram shows a partially enlarged structural schematic of point B in a flow-measuring hemispherical valve according to the present invention.

[0025] Figure 7 for Figure 6 The diagram shows a partially enlarged structural schematic of the present invention at point C.

[0026] Figure 8 This is a partial structural diagram of the cleaning component in the protective state of a flow-measurable hemispherical valve according to the present invention.

[0027] Figure 9 This is a partial structural diagram of the flow measurement unit in a flow-measurable hemispherical valve according to the present invention.

[0028] Figure 10 This is a cross-sectional view of the flow measurement unit in this invention.

[0029] Figure 11 This is a schematic diagram of the structure of the flow measurement unit and the cleaning head in this invention.

[0030] Figure 12 This is a cross-sectional view of the flow measurement unit and the cleaning head in this invention.

[0031] Figure 13 This is a schematic diagram of the structure in which the cleaning head and the probe are in a protected state in this invention.

[0032] Figure 14 for Figure 13 The diagram shows a cross-sectional view of the cleaning head and probe at the DD position in this invention.

[0033] Figure 15 This is a schematic diagram illustrating the working principle of the flow measurement unit in this invention.

[0034] Figure 16 This is a statistical table showing the usage and detection of various flow meters in scenarios where gas is present within the fluid.

[0035] In the diagram: 1. Valve body; 10. Inlet; 11. Outlet; 12. Valve stem; 13. Valve disc; 14. Mounting base; 15. Channel; 150. Port 1; 16. Drive unit; 2. Flow measurement unit; 20. Probe; 200. Detection channel; 201. Guide surface; 21. Distribution valve body; 210. Distribution valve passage; 211. Port 2; 22. Connecting valve body; 220. Connecting valve passage; 221. On / off valve; 222. Shut-off valve; 223. Liquid passage; 23. Clean 230. Cleaning Components; 230. Cleaning Head; 2300. Shovel Head; 2301. Flow Guide Ring Groove; 231. End Plug; 232. Telescopic Cylinder; 2320. Piston; 233. Compression Spring; 234. Elastic Pad; 24. Connector; 240. Through Hole; 25. Calculation Display Screen; 26. Pressure Sensor; 3. Flow Medium Supply Unit; 30. Branch 1; 300. Solenoid Valve 1; 31. Branch 2; 310. Solenoid Valve 2; 32. Branch 3; 320. Three-Way Switching Valve. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner, and therefore only show the components relevant to the invention.

[0037] refer to Figures 1 to 15 This application provides a flow-measuring hemispherical valve to address the problems of existing hemispherical valves and separate flow detection units, as well as the low adaptability of existing flow detection and measurement applications, inconvenient maintenance, and high maintenance costs. Example 1

[0038] refer to Figures 1 to 3 , Figure 15 This application provides a flow-measuring hemispherical valve, including a valve body 1 and a flow measurement unit 2. A valve disc 13, which is hemispherical in shape, is rotatably disposed within the valve body 1 and connected to a valve stem 12. The valve stem 12 is rotatably coupled to a preset rotating shaft of the valve body 1. A driving device 16 is disposed on the top of the valve body 1, and is drivingly connected to the valve stem 12 to drive the valve stem 12 to rotate around its own axis, thereby rotating the valve disc 13. This enables the opening and closing of the flow channel in the valve body 1 and the adjustment of its opening degree, meeting the basic requirements for pipeline medium cutoff and flow regulation. (Reference) Figure 1 , Figure 2 , Figure 9 The flow measurement unit 2 includes a probe 20 and a calculation display screen 25. The calculation display screen 25 integrates a calculation unit and displays the calculated value of the calculation unit. The axis of the probe 20 is perpendicular to the axis of the valve body 1. Along the axial direction of the valve body 1, the end of the probe 20 includes two opposing sides. In a specific embodiment, in this application, the end of the probe 20 is formed by beveling to form two inclined surfaces, i.e., sides, that make an acute angle with the axis. The angle between the inclined surfaces and the axis of the probe 20 is 30° to 45°.

[0039] Along the axial direction of probe 20, two non-communicating detection channels 200 are provided inside probe 20, with the ends of the two detection channels 200 located on both sides. Two pressure sensors 26 are configured at the end of probe 20 extending out of valve body 1. The pressure sensors 26 are used to detect the fluid pressure in the two detection channels 200 respectively. The calculation unit is used to obtain the detection values ​​of the two pressure sensors 26 to calculate the fluid velocity V in valve body 1. The velocity calculation formula is V=k·(2·△P / ρ)¹ / ², where k represents a proportionality constant. When the hemispherical valve is fully open, the value of k ranges from 0.15 to 0.2. △P = P1-P2, where P1 is the detection value of pressure sensor 26 on the upstream detection channel 200, P2 is the detection value of pressure sensor 26 on the downstream detection channel 200, and ρ... The density of the fluid inside valve body 1 is given by the above formula. The instantaneous flow velocity of the fluid inside valve body 1 can be calculated using the formula above. Based on the cross-section inside valve body 1, the flow rate of the fluid inside valve body 1 can be calculated, thereby achieving the detection effect.

[0040] This application integrates the flow measurement probe 20 directly into the inlet 10 side of the valve plate of a hemispherical valve, achieving an integrated design of the valve and the flow measurement structure. It employs a differential pressure measurement principle, calculating the flow velocity using the pressure difference between the two opposing sides of the probe 20's end, adapting to the flow channel characteristics inside the valve body 1. The structural design, with the probe 20's axis perpendicular to the valve body 1's axis and the detection channel 200 located on the opposing sides of the probe 20's end, accurately captures the pressure difference generated by fluid flow, ensuring accurate pressure detection. The two detection channels 200 are not interconnected, avoiding pressure signal crosstalk and improving the stability of pressure difference detection. This design is adaptable to the flow velocity calculation of different media such as water, raw water, and sewage, effectively improving media adaptability. It achieves the integration of media cutoff regulation and flow metering. (Reference) Figure 16 In practical use, when the water contains gas, its detection stability is higher than that of electromagnetic flow meters and ultrasonic flow meters. At the same time, the differential pressure measurement structure is far less affected by mud and air bubbles in the medium than electromagnetic and ultrasonic flow meters, which improves the adaptability to complex media, ensures the stability of flow measurement, and the integrated design does not require strict straight pipe section requirements, making it highly adaptable.

[0041] refer to Figure 1 , Figure 2 , Figure 6 , Figure 9 , Figure 10The flow measurement unit 2 also includes a distribution valve body 21 connected to the end of the probe 20. The distribution valve body 21 is also connected to a connecting valve body 22. The distribution valve body has a distribution valve channel 210 that communicates with the two detection channels 200 respectively. The connecting valve body 22 has a connecting valve channel 220 that communicates with the two distribution valve channels 210 respectively. The two pressure sensors 26 are fixed on the connecting valve channel 220. By setting the distribution valve body 21, when the probe 20 is directly connected to the pressure sensor 26, the connection through the distribution valve body 21 can avoid the problems of messy pipeline layout, inconvenient disassembly and maintenance, and easy leakage or unstable signal transmission at the connection point due to fluid impact and vibration. The distribution valve realizes the transfer connection between the detection channel 200 and the pressure sensor 26, and organizes the connection pipeline. As a transfer structure, the distribution valve has a one-to-one correspondence between its internal distribution valve channel 210 and the detection channel 200, and they are sealed and connected. This ensures the stable transmission of pressure signals from the detection channel 200 to the pressure sensor 26, avoiding pressure loss and crosstalk. At the same time, the pressure sensor 26 is integrated on the distribution valve, realizing the centralized arrangement of pressure detection components, which facilitates subsequent disassembly, calibration and maintenance. The pressure sensor 26 can be repaired and replaced without disassembling the probe 20 body.

[0042] For details, please refer to Figure 11 , Figure 12 A connecting valve body 22 is provided on the distribution valve body 21, and two connecting valve channels 220 are provided on the connecting valve body 220. Each connecting valve channel 220 is connected to a corresponding liquid channel 223. The two ends of the shut-off valve 222 are connected to the liquid channel 223. The shut-off valve 222 is an electromagnetic shut-off valve, which can be electrically controlled to switch between the shut-off and connected states, and the initial state is the shut-off state. Through the above configuration, the problem that water needs to be stopped and the fluid drained before operation can be carried out during the maintenance and calibration of the pressure sensor 26 and the distribution valve can be solved. The shut-off valve 222 realizes the on / off control of the two distribution valve channels 210, providing structural support for the online maintenance of the measurement unit. When the equipment is working normally, the shut-off valve 222 is in the shut-off state, and the two distribution valve channels 210 are independent of each other, ensuring the independence and accuracy of pressure detection. When the pressure sensor 26 and the distribution valve need to be inspected and calibrated, the shut-off valve 222 is switched to the connected state to keep the fluid pressure in the two distribution valve channels 210 balanced. At this time, calibration can be performed without stopping the water supply and without draining the fluid in the valve body 1 and the detection channel 200. Example

[0043] It is understandable that when used in environments with sewage or poor water quality, dirt can easily adhere to the exterior and sides of the probe 20, affecting detection stability. To facilitate maintenance of the flow measurement unit 2, this embodiment differs from Embodiment 1 in that... Figures 4 to 8 , Figures 11 to 14The valve body 1 is provided with a mounting base 14, and the probe 20 is integrally provided with a connector 24 that connects to the mounting base 14. The mounting base 14 is provided with a columnar channel.

[0044] It also includes a cleaning component 23, which comprises a telescopic cylinder 232 that engages with the guide column channel and a cleaning head 230 disposed at the end of the telescopic cylinder 232. The cleaning head 230 is sleeved on the outside of the probe 20. By setting up the cleaning component 23, the probe 20 can be cleaned online, ensuring the detection effect of the probe 20. The cooperation between the mounting base 14 and the connector 24 provides stable installation support for the probe 20, while the column channel provides movement guidance and installation space for the cleaning component 23. The telescopic cylinder 232 can reciprocate along the axial direction of the column channel, thereby driving the cleaning head 230 to move along the axial direction of the probe 20. Figure 7 The image shows the initial position of the cleaning head at 230. Figure 8 The cleaning head 230 shown is in the protective state. The movement of the telescopic cylinder 232 causes the cleaning head 230 to move, switching between the initial state and the protective state.

[0045] The cleaning head 230 is equipped with a conical shovel 2300 at its end. During movement, it can scrape away mud, sand, and impurities adhering to the surface of the probe 20, clearing and cleaning the inlet of the detection channel 200. The guiding design of the cleaning component 23 ensures the stability and accuracy of the cleaning action. Through the above configuration, the shovel 2300 can be driven to move and clean the probe 20 online in real time or periodically, effectively preventing mud, sand, and impurities from adhering and clogging the probe, ensuring the stability and continuity of pressure detection, and improving the adaptability of the equipment to complex media such as sewage and sandy water. The structural design of the cleaning component 23 eliminates the need to disassemble the probe 20, making the cleaning operation simple and not interfering with the normal operation of the equipment, further reducing the maintenance frequency and cost of the equipment.

[0046] Furthermore, as a specific implementation method, refer to Figure 4 , Figure 6 , Figure 7 The specific arrangement of the telescopic cylinder 232 and the cleaning head 230 is as follows: the connector 24 is fixedly connected to the end of the columnar channel through a flange, and a sealing fit is formed by setting a sealing gasket. The other end of the columnar channel is threaded and sealed with an end plug 231, which is annular and has a guide sealing fit with the telescopic cylinder 232. The end of the columnar channel near the end plug 231 is provided with an opening 150. The valve body 1 is also provided with a channel 15 connecting the opening 150 and the outlet 11 of the valve body 1. It also includes an elastic element that provides the telescopic cylinder 232 with movement towards the side near the end plug 231. There is an annular space between the outer circumference of the telescopic cylinder 232 and the columnar channel. The end of the telescopic cylinder 232 away from the end plug 231 is provided with a piston 2320 that has a guide fit with the columnar channel.

[0047] In a specific implementation, the elastic element is a compression spring 233 disposed between the connector 24 and the telescopic cylinder 232. Both ends of the compression spring 233 abut against the connector 24 and the telescopic cylinder 232. When the cleaning head 230 is in its initial and protective states, the compression spring 233 is in a compressed state. The cylindrical channel, end plug 231, and telescopic cylinder 232 are sealed together, as is the piston 2320 and the cylindrical channel. The valve body 1 outlet 11 communicates with the cylindrical channel and port 150. At the valve disc 13… When the valve is in the open state, the fluid flows through the valve body 1 at normal pressure. At this time, there is water pressure at the outlet 11 of the valve body 1. The interior of the valve body 1 and the columnar channel are connected through the channel 15. Since the fluid flowing inside the valve body 1 has a certain pressure, it is connected to the atmosphere at the end of the columnar channel away from the end plug 231. At this time, a pressure difference is generated on both sides of the piston 2320. Under the action of this pressure difference, the compression spring 233 is compressed, causing the cleaning head 230 to abut against the end plug 231. At this time, the cleaning head 230 is in a position where... Figure 7 The initial position shown indicates that when valve disc 13 is closed or the water pressure inside valve body 1 is low, the pressure at outlet 11 will decrease (because the fluid flows from inlet 10 to outlet 11, the fluid cannot replenish outlet 11 when valve disc 13 is closed, and the pressure at outlet 11 decreases after the fluid downstream of outlet 11 is depressurized). At this time, the elastic force of spring 233 pushes the telescopic cylinder 232 to move, thereby driving the cleaning head 230 to move to... Figure 8 The protective position shown indicates that during this process, the probe 20 is cleaned externally, and the valve body 1 remains closed, while the cleaning head 230 also remains in the protective position. Figure 8 At the position shown, when valve body 1 reopens and liquid pressure returns to outlet 11, cleaning head 230 returns to its original position. Figure 7 As shown, the cleaning head 230 and the telescopic cylinder 232 are threaded together.

[0048] By utilizing the above-mentioned configuration, the pressure change at outlet 11 when valve body 1 is opened or closed or when fluid pressure is low, a pressure difference is created on both sides of piston 2320. This difference, combined with compression spring 233, pushes telescopic cylinder 232 to move, thereby driving cleaning head 230 to complete the cleaning action. During the opening and closing of valve body 1, the cleaning head 230 can be automatically driven to clean probe 20 by utilizing the change in fluid pressure. This implementation method does not require additional electric or pneumatic drive device 16, saving equipment costs and energy consumption, and improving the intelligence and automation level of the equipment.

[0049] refer to Figure 8 When valve body 1 is closed, cleaning head 230 remains in Figure 8As shown in the protective position, the cleaning head 230 surrounds the head of the probe 20, which can isolate the head of the probe 20 from the external liquid flow. When dealing with sewage use environment, it can effectively reduce the probability of external dirt coming into contact with the head of the probe 20, and can achieve the effect of protecting the probe 20.

[0050] Further, refer to Figure 7 , Figure 8 An elastic pad 234 is provided on the end face of the end plug 231. The end face of the elastic pad 234 is a limiting surface. When the valve body 1 is in the closed state and the water pressure at the outlet 11 is released, the piston 2320 is pressed against the end face of the elastic pad 234 under the elastic force of the compression spring 233. At this time, the elastic pad 234 does not undergo elastic deformation or undergoes a slight elastic deformation (such as...). Figure 8 As shown in the figure, the limiting surface is in its initial state at this time.

[0051] refer to Figure 8 At this time, the first side of the piston 2320 is located on the side of the port 150 away from the end plug 231. The first side is the side of the piston 2320 away from the end plug 231, which prevents the port 150 from communicating with the outside and ensures that when the valve body 1 is opened again, the piston 2320 can drive the telescopic cylinder 232 to pull the cleaning head 230 back to the initial position. Example

[0052] Furthermore, it is understood that in the implementation of Embodiment 2, the cleaning component 23 can achieve automatic cleaning by relying on the opening and closing of the valve body 1 or the change in fluid pressure at the outlet 11 when the fluid supply pressure is low. However, in actual use, the opening and closing frequency of the valve body 1 is not high, and the phenomenon of high fluctuations in fluid pressure is also rare. Therefore, the cleaning component 23 cannot meet the cleaning requirements by relying solely on the above-mentioned cleaning method. In order to further improve the cleaning effect, refer to Figure 4 This embodiment discloses a flow-measurable hemispherical valve, which differs from Embodiment 2 in that an annular elastic pad 234 is provided on the end plug 231, and the outer peripheral surface of the elastic pad 234 is spaced from the side wall of the columnar channel. It also includes a fluid supply unit 3, and a branch 32 connecting the fluid supply unit 3 and the columnar channel is provided on the connector 24. A three-way switching valve 320 is provided on the branch 32.

[0053] For details, please refer to Figure 6 , Figure 9The connector 24 has a through hole 240. The flowing medium supply unit 3 supplies a flowing medium with a predetermined pressure P0, and this predetermined pressure P0 is greater than the fluid pressure P3 in the valve body 1; specifically, 3P3 ≥ P0 ≥ 1.5P3. The flowing medium can be air or clean water. The through hole 240 and the flowing medium supply unit 3 are connected through branch 32. A solenoid three-way valve is installed on branch 32. The solenoid three-way switching valve 320 is normally in a state where it is connected to the atmosphere and the through hole 240. After a predetermined working time, the switching valve can be controlled to switch between the connecting orifice 240 and the flowing medium supply unit 3. At this time, the flowing medium can flow into the columnar cavity and, together with the compression spring 233, push the piston 2320 to move, which in turn pushes the cleaning head 230 to move, achieving the cleaning effect. Furthermore, the three-way switching valve 320 can be switched 2-3 times at a predetermined frequency. When the orifice 240 is switched to connect to the atmosphere, the piston 2320 is driven back to its original position under the action of the hydraulic pressure inside the valve body 1. This process is repeated 2-3 times to ensure the cleaning effect.

[0054] Furthermore, it can be understood that when the fluid supply unit 3 connects to the through hole 240, the piston 2320 has the dual force of the compression spring 233 and the fluid medium, which can further compress the elastic pad 234 to cause greater deformation. This allows the fluid supply unit 3 to select an appropriate supply pressure, enabling the elastic pad 234 to undergo a certain amount of deformation. Specifically, the piston 2320 can move further towards the end plug 231, so that the first surface of the piston 2320 passes through the port 150, i.e., at least a portion of the port 150 is located on the side of the first surface away from the end plug 231. At this time, the fluid of the fluid supply unit 3 can flow through the channel 15 to the outlet 11 side, thereby enabling reverse flushing of the channel 15 to achieve a cleaning effect. In this embodiment, the fluid medium is preferably clean water.

[0055] Further, refer to Figure 9 , Figure 10 The distribution valve is also equipped with two ports 211 that are respectively connected to the two distribution valve channels 210. The two ports 211 are respectively equipped with branch 30 and branch 31 that are connected to the flowing medium supply unit 3. Solenoid valves are installed on both branch 30 and branch 31.

[0056] Specifically, solenoid valve 300 is installed on branch 1 30, solenoid valve 310 is installed on branch 2 31, and a connecting valve channel 220 corresponding to the distribution valve channel is installed on the connecting valve body 22. Pressure sensor 26 is installed on the connecting valve body 22 and is connected to the connecting valve channel 220. An on / off valve 221 is installed on the connecting valve channel 220. The on / off valve 221 is initially in the open state of the connecting valve channel 220. The on / off valve 221 is also a solenoid valve.

[0057] Solenoid valve 300 and solenoid valve 310 are initially closed. To further improve the cleaning effect, after a predetermined time, the two on / off valves 221 can be closed, and then solenoid valve 300 and solenoid valve 310 can be opened to backwash the detection channel 200.

[0058] Further, refer to Figure 7 , Figure 13 , Figure 14 The inner wall of the cleaning head 230 is provided with two flow guide grooves 2301 corresponding to the two detection channels 200. The flow guide grooves 2301 are semi-ring structures, with one end corresponding to one detection channel 200 and the other end corresponding to the side of the other detection channel 200. When the piston 2320 abuts against the limiting surface, the cleaning head 230 is in a state of surrounding the end of the probe 20. The end of the detection channel 200 is provided with a flow guide surface 201. The fluid flowing out of the detection channel 200 can flow into the corresponding flow guide groove 2301 after being guided by the flow guide surface 201. The flow guide surface 201 can be set at any position of the outlet 11 of the detection channel 200, as long as the predetermined effect can be achieved. Through the above setting, the cleaning unit can provide another cleaning operation mode, further improving the cleaning effect of the probe 20. The specific cleaning steps are as follows: Step 1: Control the three-way switching valve 320 to connect the through hole 240 and the flowing medium supply unit 3, so that the cleaning head 230 is in the state of surrounding the end of the probe 20. At this time, the guide ring groove 2301 corresponds to the outlet 11 of the detection channel 200. Step 2: Close the on / off valve 221 corresponding to solenoid valve 300, and then open solenoid valve 300. At this time, the fluid enters a distribution valve 210 through branch 30. (Refer to...) Figure 13 , Figure 14 After passing through a detection channel 200, the fluid flows out and is guided by the guide surface 201 into a guide ring groove 2301. It then flows through the guide ring groove 2301 to the other end of the guide ring groove 2301, and then flows out after being guided by the end face of the other end of the guide ring groove 2301. The outflowing fluid will impact the side of the other detection channel 200, thereby achieving the effect of flushing and cleaning the side.

[0059] Step 3: Control the opening and closing valve 221 corresponding to solenoid valve 2 310 to close, then control solenoid valve 2 310 to open, and then control solenoid valve 1 300 to close. At this time, the fluid can pass through another detection channel 200 and then be guided by the guide slope at the end of the other detection channel 200. Then the fluid is discharged and guided by another guide ring groove 2301 to flush the other side.

[0060] Step 4: Repeat steps 2 to 3 2-3 times, then control the three-way switching valve 320, the first solenoid valve, the second solenoid valve and the two on / off valves 221 back to their initial state, and the cleaning is finished; by using the above method, the water flow is guided by the guide ring groove 2301 to alternately flush the two sides, so as to achieve a better cleaning effect.

[0061] Furthermore, the three cleaning methods of the cleaning component 23 provided in this application can clean the probe 20 without disassembling it, making the process simple, convenient, and easy to maintain.

[0062] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A flow-measuring hemispherical valve, characterized in that, include: The valve body (1) has a valve disc (13) rotatably mounted inside. The flow measurement unit (2) includes a calculation unit and a probe (20) disposed on the side of the valve plate near the inlet (10) of the valve body (1). The axis of the probe (20) is perpendicular to the axis of the valve body (1). Along the axial direction of the valve body (1), the end of the probe (20) includes two opposing sides. Along the axial direction of the probe (20), two non-communicating detection channels (200) are disposed inside the probe (20), and the end portions of the two detection channels (200) are disposed on the two sides. Two pressure sensors (26) are disposed at one end of the probe (20) extending out of the valve body (1). The pressure sensors (26) are used to detect the fluid pressure in the two detection channels (200) respectively. The calculation unit is used to obtain the detection values ​​of the two pressure sensors (26) to calculate the fluid velocity V in the valve body (1).

2. The flow-measuring hemispherical valve according to claim 1, characterized in that, The flow measurement unit (2) also includes a distribution valve body (21) connected to the end of the probe (20). The distribution valve body (21) is provided with a distribution valve channel (210) that is connected to the two detection channels (200) respectively. The two pressure sensors (26) are connected to the two distribution valve channels (210) respectively.

3. A flow-measuring hemispherical valve according to claim 2, characterized in that, It also includes a shut-off valve (222), the two ends of which are connected to two distribution valve channels (210) respectively, and the shut-off valve (222) can switch between shut-off and connected states.

4. A flow-measuring hemispherical valve according to claim 1, characterized in that, The valve body (1) is provided with a mounting base (14), and the probe (20) is integrally provided with a connector (24) that connects to the mounting base (14). The mounting base (14) is provided with a columnar channel. It also includes a cleaning component (23), which includes a telescopic cylinder (232) that cooperates with the columnar channel guide and a cleaning head (230) disposed at the end of the telescopic cylinder (232), the cleaning head (230) being sleeved on the outside of the probe (20).

5. A flow-measuring hemispherical valve according to claim 4, characterized in that, The connector (24) is sealed to the end of the columnar channel, and the other end of the columnar channel is sealed with an end plug (231), which is guided and sealed to the telescopic cylinder (232). The columnar channel is provided with a port (150) at one end near the end plug (231), and the valve body (1) is also provided with a channel (15) connecting the port (150) and the outlet (11) of the valve body (1). It also includes an elastic element that provides the telescopic cylinder (232) to move toward the side closer to the end plug (231), and there is an annular space between the outer peripheral surface of the telescopic cylinder (232) and the columnar channel. A piston (2320) that cooperates with the columnar channel is provided at the end of the telescopic cylinder (232) away from the end plug (231).

6. A flow-measuring hemispherical valve according to claim 5, characterized in that, A limiting surface is provided on the end face of the end plug (231), and the limiting surface has an initial position; When the piston (2320) comes into contact with the limit of the initial position, the first surface of the piston (2320) is located on the side of the port (150) away from the end plug (231). The first surface is the side of the piston (2320) away from the end plug (231).

7. A flow-measuring hemispherical valve according to claim 6, characterized in that, The end plug (231) is provided with an annular elastic pad (234), and the outer peripheral surface of the elastic pad (234) is spaced from the side wall of the columnar channel. It also includes a fluid medium supply unit (3), and the connector (24) is provided with a branch three (32) that connects the fluid medium supply unit and the columnar channel, and a three-way switching valve (320) is provided on the branch three (32).

8. A flow-measuring hemispherical valve according to claim 7, characterized in that, The limiting surface is the end face of the elastic pad (234), and the limiting surface has a second position when the elastic pad (234) is compressed. When the piston (2320) contacts the elastic pad (234) in the second position, at least a portion of the port (150) is located on the side of the first surface away from the end plug (231).

9. A flow-measuring hemispherical valve according to claim 7 or 8, characterized in that, The distribution valve body (21) is also equipped with two ports (211) that are connected to the two distribution valve channels (210) respectively. Each of the two ports (211) is equipped with a branch that is connected to the flow medium supply unit (3), and each branch is equipped with a solenoid valve.

10. A flow-measuring hemispherical valve according to claim 7 or 8, characterized in that, When the piston (2320) abuts against the limiting surface, the cleaning head (230) is in a state that surrounds the end of the probe (20).

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