A flow regulating valve

Abstract

The present application relates to the field of flow regulating devices, and in particular to a flow regulating valve. The flow regulating valve comprises a valve body and a valve stem, wherein a circular channel is provided in the valve body, a valve core is rotatably connected in the circular channel, a connecting hole is provided in the middle of the valve core for mounting the valve stem, and the valve core comprises two valve discs which are arranged 180° rotationally symmetrically with the axis of rotation of the connecting hole as the center line. The positive surface of the valve disc is spherical and provided with a gradient groove, while the negative surface is a planar structure. Within different opening ranges, the area of ​​the medium flow channel formed by the gradient groove and the edge of the negative surface and the circular channel respectively changes in a specific pattern as the valve core opening changes. In addition, the valve stem is driven by a servo motor for precise control, and a fluid state monitoring device is detachably connected to the side of the valve body. The detection data is fed back to the control unit to further optimize the flow regulation accuracy. The present application achieves a flow regulation effect with high precision, stability and response speed.

Description

Technical Field

[0001] The present application relates to the field of flow regulating devices, and in particular to a flow regulating valve. Background Art

[0002] Flow control valves are widely used in various fields, including industrial production, municipal water supply, and the chemical industry, primarily for precisely controlling the flow of fluids within pipelines. Traditional flow control valves achieve flow control by manually or electrically adjusting the valve core position to change the fluid flow area. These devices play a vital role in practical applications, effectively ensuring process stability and safety, and improving resource utilization and production efficiency.

[0003] Existing flow control valves are mainly divided into linear characteristic control and equal percentage characteristic control according to their flow characteristics. Among them, the flow of the linear characteristic control valve is proportional to the position of the actuator, and the control accuracy is high; it performs better when processing low-viscosity fluids; the control effect is better in occasions with smaller flow rates, but when the actuator approaches the upper and lower limits, the flow control accuracy decreases, resulting in flow fluctuations; the percentage characteristic control valve has a wide flow control range and is suitable for production processes with large flow changes. When the actuator approaches the upper and lower limits, the flow control accuracy is higher, but for occasions with smaller flow rates, the flow control accuracy is relatively low, and the control accuracy is relatively inferior to the linear control valve.

[0004] It can be seen that the above-mentioned traditional flow control valves all have some shortcomings, especially when dealing with complex working conditions. Specifically, the flow control is not flexible enough, and it is impossible to achieve precise control of the flow at different flow rates, and it is difficult to respond to parameter changes in the system in real time. Summary of the Invention

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the present application provides a flow control valve that can simultaneously have the flow characteristic control capabilities of linear and equal percentage characteristics, meet the precise control of flow under different flow rates, and respond to parameter changes in the system in real time.

[0006] This application is achieved through the following technical solutions:

[0007] A flow regulating valve comprises a valve body and a valve stem, wherein a circular channel is provided in the valve body, a valve core adapted to the diameter of the circular channel is rotatably connected in the circular channel, a connecting hole for mounting the valve stem is provided in the middle of the valve core, and the valve core comprises two valve discs which are arranged 180° rotationally symmetrically with the rotation axis of the connecting hole as the center line; the positive surface of the valve disc is a spherical structure, the spherical structure is adapted to the circular channel, and a gradient groove is provided on the positive surface, and the negative surface located on the back of the positive surface of the valve disc is a planar structure; wherein, within a set valve core opening range, the area of ​​the medium flow channel formed by the gradient groove and the circular channel of the regulating valve body increases or decreases linearly as the valve core opening increases, and within another set valve core opening range, the area of ​​the medium flow channel formed by the edge of the negative surface of the valve disc and the circular channel of the regulating valve body increases or decreases percentage-wise as the valve core opening increases.

[0008] By adopting the above technical solution, the flow control valve can achieve precise flow control and efficient pressure management. Specifically, the valve core design makes the medium flow channel area show two different change patterns as the valve core opening changes, either linearly or as a percentage, ensuring smooth and precise flow regulation under different working conditions. The design of the gradient groove effectively improves the response speed and adjustment accuracy of the valve, especially when adjusted over a large range, it can still maintain good flow characteristics and stability. The positive side of the valve disc has a spherical structure and the negative side has a planar structure. This special design not only reduces flow resistance, but also enhances sealing performance and reduces the risk of leakage. The overall structure is compact, small in size, and light in weight, making it easy to install and maintain and suitable for various complex application environments.

[0009] Optionally, the flow control valve uses the state where the valve disc negative surface and the circular channel axis are arranged parallel to each other as the zero scale line of the valve core opening. When the valve core is rotated clockwise within a range of 90°, the medium flow channel area formed by the gradient groove and the circular channel of the regulating valve body decreases linearly with the increase of the valve core opening. When the valve core is rotated counterclockwise within a range of 90°, the medium flow channel area formed by the edge of the valve disc negative surface and the circular channel of the regulating valve body decreases in a percentage characteristic with the increase of the valve core opening.

[0010] By adopting the above technical solution, precise control of the flow control valve at different openings is achieved. Specifically, the state in which the valve disc's negative surface and the circular channel axis are arranged parallel to each other is the zero mark of the valve core opening, which can ensure that the control valve is in a normally open state. After obtaining the numerical value of the flow rate in the pipeline, it responds quickly to select the flow regulation method. Among them, when the valve core is rotated clockwise within a range of 90°, the medium flow channel area composed of the gradient groove and the circular channel decreases linearly with the increase of the valve core opening, ensuring the smoothness and predictability of the flow change; and when the valve core is rotated counterclockwise within a range of 90°, the medium flow channel area composed of the edge of the valve disc's negative surface and the circular channel decreases in percentage characteristics with the increase of the valve core opening, further improving the flexibility and response speed of the flow regulation. This design not only optimizes the working performance of the valve, but also improves the stability, reliability and response speed of the system.

[0011] Optionally, the bottom surface of the gradient groove is an arc-shaped structure, and the tangent plane of the arc-shaped structure close to the end of the rotation axis is arranged parallel to the plane structure of the negative surface; the side edge of the gradient groove is a trumpet-shaped structure, and the end of the side edge away from the rotation axis forms a closed sealing surface.

[0012] By adopting the above technical solution, the bottom surface of the gradient groove has an arc structure, which can further optimize the medium flow path, so that the medium can maintain a relatively uniform and stable flow velocity distribution under different valve core openings, thereby improving the flow regulation accuracy and stability. At the same time, this design also helps to reduce the occurrence of eddy currents and turbulence, reduce noise and vibration, and extend the service life of the valve; the side edge of the gradient groove has a trumpet-shaped structure, which can form a channel with a smoothly gradient flow area between the circular channel; the end of the side edge of the gradient groove away from the rotation axis forms a closed sealing surface, which can achieve complete closure of the flow pipeline.

[0013] Optionally, the valve stem is provided with rotational power by a driving device installed on the valve body to control the opening of the valve core.

[0014] By adopting the above technical solution, the valve stem is provided with rotational power by a drive device installed on the valve body, thereby precisely controlling the opening of the valve core. This design enables the valve to quickly respond to control system commands, improving flow regulation accuracy and stability. At the same time, this solution also simplifies the valve structure, reduces maintenance costs, and improves the reliability and service life of the system. Specifically, the drive device is a servo motor or a stepper motor. As a drive device, the servo motor or stepper motor can provide precise rotational power to achieve precise control of the valve core opening; this precise control makes flow regulation more flexible, can quickly respond to changes in demand under different working conditions, and improve the stability and reliability of the system; at the same time, the servo motor or stepper motor has good dynamic characteristics and high positioning accuracy, which helps to improve the intelligence level and automation level of the entire valve device, reduce human intervention, and reduce the difficulty of operation and maintenance costs.

[0015] Optionally, a fluid state monitoring device is detachably connected to the side of the valve body, and the fluid state monitoring device is electrically connected to the control unit of the flow control valve. The control unit receives data obtained by the fluid state monitoring device and controls the driving device according to the monitoring data to adjust the opening of the valve core.

[0016] By adopting this technical solution, the flow control valve can monitor the state of the fluid in the pipeline in real time, such as temperature, pressure, flow rate, and other parameters, and transmit this data to the control unit. The control unit automatically adjusts the operating state of the drive device based on the received data, thereby precisely controlling the opening of the valve core and achieving accurate regulation of the fluid flow in the pipeline. This not only improves the system's response speed and control accuracy, but also reduces the need for human intervention, improving the system's automation level and reliability. At the same time, this design enables the system to automatically switch between different operating conditions, further optimizing the system's performance and adaptability.

[0017] Optionally, the fluid state monitoring device is a pipeline flow meter.

[0018] By adopting the above technical solution, the fluid state monitoring device uses a pipeline flow meter to accurately monitor the flow rate changes of the fluid in the pipeline in real time. This allows the control system to precisely adjust the valve opening based on the actual flow data, thereby achieving more precise flow control and improving the system's response speed and stability.

[0019] Optionally, a temperature sensor is provided on the medium flow pipe of the pipeline flowmeter.

[0020] By adopting this technical solution, a temperature sensor is installed on the medium flow pipe of the pipeline flowmeter, which can monitor the temperature changes of the fluid in the pipe in real time, thereby providing more comprehensive information on the fluid status. This helps to improve the control accuracy and response speed of the system, ensuring that the opening of the flow control valve can be accurately adjusted under different operating conditions and achieving precise flow control. At the same time, the addition of the temperature sensor enables the system to automatically switch between winter and summer operating modes, reducing manual intervention and avoiding imbalance problems caused by seasonal changes.

[0021] Optionally, a pressure sensor is provided on the medium flow pipeline of the pipeline flowmeter.

[0022] By adopting this technical solution, a pressure sensor is installed on the medium flow pipe of the pipeline flowmeter, which can monitor pressure changes in the pipe in real time and transmit the data to the control unit. Combined with other parameters provided by the fluid state monitoring device, such as temperature and flow rate, the control unit can more accurately determine the current operating conditions, thereby precisely adjusting the valve opening and achieving precise control of the flow rate. At the same time, the introduction of the pressure sensor improves the system's response speed and stability, ensuring excellent flow regulation performance under different operating conditions.

[0023] Optionally, the valve body and the fluid state monitoring device are fixed by a flange connection; and a clamp-type connection disk is provided at one end of the valve body away from the fluid state monitoring device.

[0024] By adopting the above technical solution, the flange connection between the valve body and the fluid state monitoring device ensures the stability and sealing between the two, facilitates quick installation and maintenance, and improves the convenience of on-site operation. At the same time, this connection method can also effectively prevent fluid leakage and ensure the safe operation of the system; and the design of the clamp-type connecting plate makes the installation of the valve more convenient, reduces the number of required connectors, and reduces the installation cost. At the same time, the use of the clamp-type connecting plate can also effectively shorten the structural length, reduce material consumption, and further reduce costs.

[0025] Optionally, a flange connection plate is provided at one end of the pipeline flowmeter away from the valve body.

[0026] By adopting this technical solution, a flange connection plate is provided on the end of the pipeline flowmeter away from the valve body, allowing the flowmeter to be quickly and easily connected to other piping systems in a standardized manner, improving system installation efficiency and maintenance convenience. At the same time, this connection method ensures connection reliability and sealing, reducing the risk of leakage.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] The design of the valve core of the present application enables the medium flow channel area to increase / decrease linearly or in percentage as the opening changes, thereby improving the flexibility and stability of flow regulation and solving the problem of insufficient flow regulation in the prior art.

[0029] The present application combines a fluid state monitoring device and a control unit to monitor and provide feedback on various fluid parameters in the pipeline in real time, such as temperature and pressure, thereby achieving intelligent control and overcoming the defect that traditional flow control valves cannot effectively monitor and control multiple parameters;

[0030] This application adopts the structural design of flange connection plate and clamp-type connection plate, so that the flow meter can be easily and quickly connected to other piping systems in a standardized manner, improving the installation efficiency and maintenance convenience of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the three-dimensional structure of the flow control valve in Example 1;

[0032] Figure 2 1 is a front view structural diagram of the flow control valve in Example 1;

[0033] Figure 3 Schematic diagram of the three-dimensional structure of the valve core in Example 1;

[0034] Figure 4 Schematic diagram of the cross-sectional structure of the valve core in Example 1;

[0035] Figure 5 1 is a front view structural diagram of the valve core in the first embodiment;

[0036] Figure 6 This is a schematic diagram of the top view of the structure when the valve core opening is at the zero scale line state in the first embodiment;

[0037] Figure 7 This is a front view structural diagram of the valve core in the first embodiment when the valve core opening is at the zero scale line state;

[0038] Figure 8 This is a schematic top view of the structure of the valve core in the first embodiment when it rotates clockwise within a range of 90°;

[0039] Figure 9 This is a front view structural diagram of the valve core in the first embodiment rotating clockwise within a range of 90 degrees;

[0040] Figure 10 This is a schematic top view of the structure of the valve core in the first embodiment when it rotates counterclockwise within a range of 90°;

[0041] Figure 11 This is a front view structural diagram of the valve core in the first embodiment rotating counterclockwise within a range of 90 degrees;

[0042] Figure 12 It is a structural diagram of the flow control valve in Example 2;

[0043] Figure 13 Schematic diagram of the three-dimensional structure of the flow control valve in Example 3;

[0044] Figure 14 It is a schematic diagram of the top structure of the flow control valve in Example 3.

[0045] In the figure: 1. Valve body; 11. Wafer-type connecting plate; 12. Circular channel; 2. Valve stem; 3. Valve core; 31. Valve disc; 311. Male side; 3111. Gradient groove; 3112. Bottom surface; 3113. Side edge; 3114. Closed sealing surface; 312. Female side; 32. Connecting hole; 4. Driving device; 5. Pipeline flowmeter; 51. Flange connecting plate; 6. Temperature sensor; 7. Pressure sensor. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions of the various embodiments of the present application in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application. Example 1

[0047] Reference Figures 1 to 3 The embodiment of the present application discloses a flow control valve, including a valve body 1 and a valve stem 2, wherein the valve body 1 is provided with a circular channel 12, and a valve core 3 adapted to the diameter of the circular channel 12 is rotatably connected to the circular channel 12, and a connecting hole 32 for mounting the valve stem 2 is provided in the middle of the valve core 3, and the valve core 3 includes two valve discs 31 arranged 180° rotationally symmetrically with the rotation axis of the connecting hole 32 as the center line; the positive surface 311 of the valve disc 31 is a spherical structure, which is adapted to the circular channel 12, and on the positive surface 31 1 is provided with a gradual groove 3111, and the female surface 312 located on the back of the positive surface 311 of the valve disc 31 has a planar structure; within a set opening range of the valve core 3, the medium flow channel area formed by the gradual groove 3111 and the circular channel 12 of the regulating valve body 1 increases or decreases linearly as the opening of the valve core 3 increases, and within another set opening range of the valve core 3, the medium flow channel area formed by the edge of the negative surface 312 of the valve disc 31 and the circular channel 12 of the regulating valve body 1 increases or decreases percentage-wise as the opening of the valve core 3 increases.

[0048] Specifically, refer to Figures 3 to 5In the valve body 1, a valve core 3 is rotatably connected in the circular channel 12. The connecting hole 32 of the valve core 3 is used to install the valve stem 2. A hand wheel can be installed on the valve stem 2 to control the opening of the valve core 3. In order to ensure that the medium can maintain a relatively uniform and stable flow velocity distribution at different openings, thereby improving the flow regulation accuracy and stability, the bottom surface 3112 of the gradual groove 3111 is designed with an arc surface structure, and the tangent plane of the arc surface structure close to the end of the rotation axis is arranged parallel to the plane structure of the negative surface 312; the side edge 3113 of the gradual groove 3111 is a trumpet-shaped structure, which can form a smooth and gradual flow area between the circular channel 12. channel; and in order to achieve complete closure of the circulation pipeline, the end of the side edge 3113 of the gradient groove 3111 away from the rotation axis forms a closed sealing surface 3114; the design of the gradient groove 3111 enables the valve to achieve a linear flow characteristic change trend in small flow situations, has high sensitivity, and is suitable for precise control. At the same time, this design also helps to reduce the occurrence of eddy currents and turbulence, reduce noise and vibration, and extend the service life of the valve; and the negative surface 312 of the valve disc 31 is a planar structure design, which enables the valve to achieve a flow percentage characteristic change trend in large flow situations, showing a high flow regulation performance.

[0049] In actual application, in the initial state, refer to Figure 6-Figure 7 The flow control valve takes the state where the negative surface 312 of the valve disc 31 and the axis of the circular channel 12 are arranged in parallel as the zero mark of the valve core 3 opening to ensure that the regulating valve is in a normally open state and responds quickly after obtaining the value of the flow size in the pipeline; when the fluid in the valve body 1 is in a small flow state, refer to Figures 8 and 9 , the valve core 3 can be controlled to rotate clockwise within a range of 90°. In this state, the medium flow channel area formed by the gradual groove 3111 and the circular channel 12 of the regulating valve body 1 decreases linearly with the increase of the opening of the valve core 3; and when the valve body 1 is in a large flow state, refer to Figure 10-11 The valve core 3 can be controlled to rotate counterclockwise within a range of 90°. In this state, the medium flow channel area formed by the edge of the negative surface 312 of the valve disc 31 and the circular channel 12 of the regulating valve body 1 decreases in percentage as the opening of the valve core 3 increases, thereby achieving rapid response and precise control of the flow control valve at different openings.

[0050] The implementation principle of this embodiment is: the flow control valve can achieve precise flow control and efficient pressure management. Specifically, the design of the valve core 3 makes the medium flow channel area show two different change laws as the opening of the valve core 3 changes, namely linear characteristics or percentage characteristics, ensuring smooth and precise flow regulation under different working conditions. The design of the gradient groove 3111 effectively improves the response speed and adjustment accuracy of the valve, especially when adjusted over a large range, it can still maintain good flow characteristics and stability. The positive surface 311 of the valve disc 31 is a spherical structure, and the negative surface 312 is a planar structure. This special design not only reduces the flow resistance, but also enhances the sealing performance and reduces the risk of leakage. The overall structure is compact, small in size, light in weight, easy to install and maintain, and suitable for various complex application environments. Example 2

[0051] Reference Figure 12 The difference between this embodiment and the first embodiment is that the valve stem 2 is provided with rotational power by a driving device 4 installed on the valve body 1 to control the opening of the valve core 3. Specifically, the driving device 4 is a servo motor or a stepper motor. The servo motor or stepper motor as the driving device 4 can provide precise rotational power to achieve precise control of the opening of the valve core 3. This precise control makes the flow regulation more flexible, can quickly respond to changes in demand under different working conditions, and improve the stability and reliability of the system. At the same time, the servo motor or stepper motor has good dynamic characteristics and high positioning accuracy, which helps to improve the intelligence level and automation level of the entire valve device, reduce human intervention, and reduce the difficulty of operation and maintenance costs. In specific implementation, the servo motor or stepper motor is connected to the valve stem 2 through a reduction gearbox to ensure sufficient torque output to drive the rotation of the valve core 3. The selection of the reduction gearbox should take into account its transmission efficiency and service life. Commonly used materials include bronze, steel, etc.

[0052] The implementation principle of this embodiment is: by providing rotational power through the drive device 4, not only the cost of labor input is reduced, but also the opening of the valve core 3 can be controlled in real time and accurately. This design enables the valve to quickly respond to the control system instructions and improve the flow regulation accuracy and stability. At the same time, this solution also simplifies the valve structure, reduces maintenance costs, and improves the reliability and service life of the system. The use of stepper motors and servo motors enables the flow control valve to have higher positioning accuracy and stronger holding torque at low speeds, which is particularly suitable for applications that require frequent starting and stopping and precise positioning. Overall, this embodiment further simplifies the system structure, reduces costs, and enhances applicability while maintaining the original advantages. Example 3

[0053] Reference Figure 13-14The difference between this embodiment and the second embodiment is that a fluid state monitoring device is detachably connected to the side of the valve body 1, and the fluid state monitoring device is electrically connected to the control unit of the flow control valve. The control unit receives data obtained by the fluid state monitoring device and controls the driving device 4 according to the monitoring data to adjust the opening of the valve core 3; the fluid state monitoring device is a pipeline flow meter 5, which can be an ultrasonic type or an electromagnetic induction type to monitor the flow change of the fluid in real time and timely convert the flow control mode to achieve flow control accuracy and stability.

[0054] Reference Figure 14 A threaded seat can be welded on the medium circulation pipeline of the pipeline flowmeter 5 for installing a temperature sensor 6 to monitor the temperature changes of the fluid in real time and transmit the data to the control unit to ensure the stable operation of the system. At the same time, the addition of the temperature sensor 6 enables the system to automatically switch the operating mode between winter and summer, reducing manual intervention and avoiding imbalance problems caused by seasonal changes.

[0055] Reference Figure 14 A threaded seat can also be welded on the medium circulation pipeline of the pipeline flowmeter 5 for installing a pressure sensor 7, which is used to monitor the pressure changes of the fluid in real time and transmit the data to the control unit. Combined with other parameters provided by the fluid state monitoring device, the control unit can more accurately judge the current working conditions, thereby accurately adjusting the opening of the valve core 3 and achieving fine control of the flow rate.

[0056] Reference Figure 13-14 The valve body 1 is secured to the fluid condition monitoring device using a flange connection, which facilitates maintenance and replacement while ensuring a tight seal. A wafer-type connection plate 11 is provided on the end of the valve body 1 away from the fluid condition monitoring device, making installation of the entire device more convenient and quick, reducing installation time and costs.

[0057] It should be pointed out that the control unit of the flow control valve has added a wireless communication module, which enables the flow control valve to be remotely monitored and controlled. The wireless communication module is integrated inside the control unit and exchanges data with external devices through an antenna. Through the wireless communication module, users can remotely view the working status of the flow control valve, send control instructions, and realize remote monitoring and management.

[0058] The implementation principle of this embodiment is as follows: it can monitor the state of the fluid in the pipeline in real time, such as parameters such as temperature, pressure, and flow, and transmit this data to the control unit; the control unit automatically adjusts the operating state of the drive device 4 based on the received data, thereby accurately controlling the opening of the valve core 3 and achieving precise regulation of the fluid flow in the pipeline. This not only improves the system's response speed and control accuracy, but also reduces the need for human intervention, improving the system's automation level and reliability. At the same time, this design enables the system to automatically switch between different operating conditions, further optimizing the system's performance and adaptability. In terms of overall structure, this flow control valve has the advantages of compact structure, reliable performance, and simple operation, significantly improving the flexibility and accuracy of flow control.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present application.

Claims

1. A flow control valve, comprising a valve body (1) and a valve stem (2), characterized in that: The valve body (1) is provided with a circular channel (12), a valve core (3) adapted to the diameter of the circular channel (12) is rotatably connected to the circular channel (12), a connecting hole (32) for mounting the valve stem (2) is provided in the middle of the valve core (3), and the valve core (3) comprises two valve flaps (31) which are arranged 180° rotationally symmetrically with the rotation axis of the connecting hole (32) as the center line; the positive surface (311) of the valve flap (31) is a spherical structure, the spherical structure is adapted to the circular channel (12), and a gradient groove (3111) is provided on the positive surface (311), and the negative surface (312) located on the back of the positive surface (311) of the valve flap (31) is a planar structure; the bottom surface (3112) of the gradient groove (3111) is an arc structure, and the tangent plane of the arc structure close to the rotation axis end and the plane of the negative surface (312) are connected. The structure is arranged in parallel; the side edge (3113) of the gradual groove (3111) is a trumpet-shaped structure, and the end of the side edge (3113) away from the rotation axis forms a closed sealing surface (3114); wherein, the flow control valve takes the state where the inner surface (312) of the valve disc (31) and the axis of the circular channel (12) are arranged in parallel as the zero mark of the valve core (3) opening, and when the valve core (3) is rotated clockwise within a range of 90 degrees, the medium flow channel area formed by the gradual groove (3111) and the circular channel (12) of the regulating valve body (1) decreases linearly as the valve core (3) opening increases, and when the valve core (3) is rotated counterclockwise within a range of 90 degrees, the medium flow channel area formed by the edge of the inner surface (312) of the valve disc (31) and the circular channel (12) of the regulating valve body (1) decreases percentage-wise as the valve core (3) opening increases.

2. The flow control valve according to claim 1, characterized in that: The valve stem (2) is provided with rotational power by a driving device (4) mounted on the valve body (1), thereby controlling the opening of the valve core (3).

3. The flow control valve according to claim 2, characterized in that: A fluid state monitoring device is detachably connected to the side of the valve body (1), and the fluid state monitoring device is electrically connected to a control unit of the flow control valve. The control unit receives data obtained by the fluid state monitoring device and controls the driving device (4) according to the monitoring data to adjust the opening of the valve core (3).

4. The flow control valve according to claim 3, characterized in that: The fluid state monitoring device is a pipeline flow meter (5).

5. The flow control valve according to claim 4, characterized in that: A temperature sensor (6) is provided on the medium flow pipe of the pipeline flow meter (5).

6. The flow control valve according to claim 4, characterized in that: A pressure sensor (7) is provided on the medium flow pipeline of the pipeline flow meter (5).

7. The flow control valve according to claim 4, characterized in that: The valve body (1) and the fluid state monitoring device are fixed by a flange connection method; the end of the valve body (1) away from the fluid state monitoring device is provided with a clamping type connection disk (11).

8. The flow control valve according to claim 5, characterized in that: The pipeline flow meter (5) is provided with a flange connection plate (51) at one end away from the valve body (1).

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