Sectional type flow control device

Abstract

The utility model discloses a sectional type flow control device, which relates to the technical field of flow control and comprises a main channel, a sectional valve group, a driving mechanism and a plurality of branch channels communicated with the main channel. The branch channels are sequentially arranged in the axial direction of the main channel, and segmented regulation and control of fluid are achieved through the segmented valve set. The segmented valve set is composed of a plurality of independent sliding valve elements, and each sliding valve element is installed at an inlet of the corresponding branch channel and achieves synchronous or independent movement through a driving mechanism. The driving mechanism is connected with the sliding valve element through a transmission assembly and used for driving the sliding valve element to move in the axial direction of the branch channel so as to change the opening degree of the branch channel. According to the sectional type flow control device, through the design of the sectional valve group, the flow distribution proportion of each branch channel can be dynamically adjusted according to the actual working condition, the multi-section type flow requirement is met, and the flexibility of flow control is improved.

Description

Technical Field

[0001] This utility model relates to the field of flow control technology, specifically to a segmented flow control device. Background Technology

[0002] Flow control devices are commonly used in industrial automation and fluid control systems, primarily to regulate fluid flow and ensure its stability under various operating conditions. Current technologies often employ flow control devices based on single-channel structures or mechanical feedback mechanisms. When faced with dynamically changing or multi-stage flow demands, these devices frequently exhibit slow response times and limited adjustment ranges, making it difficult to fully meet the high precision and intelligent requirements of modern industry.

[0003] A search revealed a flow control device with publication number CN111936948B, published on July 23, 2024. This solution divides the fluid path into multiple branches and installs independent control valves on each branch to regulate the total flow. This design can increase the maximum controllable flow, but because multiple control valves need to work together, the overall system structure is relatively complex, and the design and maintenance of the control logic are challenging. Furthermore, this solution does not involve segmented automatic switching functionality, and cannot dynamically adjust the flow distribution ratio of each branch according to actual operating conditions, limiting its flexibility in intelligent control scenarios.

[0004] A search revealed a flow control device with publication number CN116185086B, published on March 29, 2024. This solution proposes a closed-loop control method based on cumulative flow prediction. By monitoring the relationship between valve opening and instantaneous flow, the valve is closed in advance to reduce errors. This method demonstrates high accuracy in quantitative liquid supply or filling scenarios, but it primarily optimizes for single flow control valves and lacks support for multi-segment flow switching, making it difficult to achieve adaptive adjustment within different flow ranges. Furthermore, its reliance on high-precision sensors and complex algorithms limits its adaptability to low-cost, low-power applications.

[0005] In summary, although existing technologies have made some progress in terms of flow control accuracy and range expansion, they still have certain limitations in segmented and adaptive adjustment. On the one hand, multi-channel collaborative control schemes are structurally and logically complex; on the other hand, control strategies based on cumulative flow prediction fail to fully cover multi-segment adjustment needs and lack support for dynamic switching modes under different operating conditions. Therefore, there is an urgent need for a new type of flow control device with a simple structure, rapid response, and segmented automatic adjustment capability to meet the demands of modern industry for efficient and intelligent flow control. Utility Model Content

[0006] This invention provides a segmented flow control device, aiming to overcome the shortcomings of existing flow control devices in terms of multi-segment adjustment, dynamic switching, and structural complexity. The specific solution is as follows:

[0007] A segmented flow control device includes a main channel, segmented valve groups, and a drive mechanism, and also includes multiple branch channels communicating with the main channel. The branch channels are arranged sequentially along the axial direction of the main channel, and the segmented flow control is achieved through the segmented valve groups. The segmented valve groups consist of multiple independent sliding valve cores, each of which is installed at the inlet of a corresponding branch channel and moves synchronously or independently through the drive mechanism. The drive mechanism is connected to the sliding valve cores through a transmission component and is used to drive the sliding valve cores to move along the axial direction of the branch channels to change the opening degree of the branch channels.

[0008] As a preferred embodiment of the segmented flow control device of this utility model, the top of the main channel is provided with a groove along its length, a slider is installed in the groove, and the slider is fixedly connected to the transmission component; the bottom of the slider is provided with a protrusion, which is embedded in the groove and slides in cooperation with the groove; the top of the slider is connected to the output end of the drive mechanism, and the drive mechanism drives the transmission component to move along the groove through the slider.

[0009] In a preferred embodiment of the segmented flow control device of this utility model, the transmission assembly includes multiple connecting rods, one end of each connecting rod is hinged to the slider, and the other end is hinged to the corresponding sliding valve core; the middle part of the connecting rod is rotatably connected to the outer wall of the main channel through a rotating shaft, and the rotation of the connecting rod is used to convert the linear motion of the slider into the axial displacement of the sliding valve core.

[0010] In a preferred embodiment of the segmented flow control device of this utility model, the outer wall of the sliding valve core is provided with a sealing ring, which is tightly fitted with the inner wall of the inlet of the branch channel; the tail of the sliding valve core is provided with a guide rod, which passes through the side wall of the branch channel and is slidably connected to the branch channel; the outer wall of the guide rod is provided with a spring, one end of which is fixedly connected to the outer wall of the branch channel, and the other end is fixedly connected to the tail of the sliding valve core, for applying a restoring force to the sliding valve core.

[0011] As a preferred embodiment of the segmented flow control device of this utility model, the driving mechanism includes a stepper motor and a lead screw. The output shaft of the stepper motor is fixedly connected to one end of the lead screw, and the other end of the lead screw is rotatably connected to the outer wall of the main channel through a bearing seat. The top of the slider is provided with a threaded hole, which is threadedly engaged with the lead screw. The stepper motor drives the slider to move along the slide groove through the lead screw.

[0012] As a preferred embodiment of the segmented flow control device of this utility model, the outer wall of the main channel is provided with a plurality of limiting blocks, which are evenly distributed along the length of the slide groove; the top of the limiting block is provided with a groove, and a ball is installed in the groove. The ball rolls in contact with the bottom of the slider to reduce the friction between the slider and the slide groove.

[0013] As a preferred embodiment of the segmented flow control device of this utility model, a diffuser is provided at the outlet of the branch channel. The inner wall of the diffuser is tapered to smoothly transition the flow direction of the fluid from the branch channel to the external environment. A baffle is provided at the outlet end of the diffuser. The baffle is rotatably connected to the outer wall of the diffuser by a hinge. The rotation of the baffle is used to adjust the outlet area of ​​the diffuser.

[0014] As a preferred embodiment of the segmented flow control device of this utility model, the outer wall of the baffle is provided with a tension spring, one end of which is fixedly connected to the baffle and the other end is fixedly connected to the outer wall of the diffuser, for applying a rebound force to the baffle; the bottom of the baffle is provided with a flange, which fits against the outlet end face of the diffuser to enhance the sealing performance when the baffle is closed.

[0015] As a preferred embodiment of the segmented flow control device of this utility model, the bottom of the main channel is provided with multiple detection ports, which are evenly distributed along the length of the main channel; a pressure sensor is installed in each detection port, and the probe of the pressure sensor is connected to the inner cavity of the main channel for real-time monitoring of pressure changes in the main channel.

[0016] As a preferred embodiment of the segmented flow control device of this utility model, the front end of the sliding valve core is provided with a conical head, the outer wall of the conical head is in contact with the inner wall of the branch channel inlet, which is used to reduce the turbulence of the fluid at the inlet of the branch channel; the rear end of the sliding valve core is provided with a buffer pad, which is in contact with the inner wall of the branch channel, which is used to absorb the impact force of the sliding valve core during the movement.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] This device, through its segmented valve group design, can dynamically adjust the flow distribution ratio of each branch channel according to actual working conditions, meet multi-segment flow requirements, and improve the flexibility of flow control.

[0019] This device converts the linear motion of the slider into the axial displacement of the sliding valve core through a transmission component, which simplifies the structure of the drive mechanism and reduces the complexity and maintenance cost of the system.

[0020] This device, through the design of the sealing ring and guide rod on the sliding valve core, ensures the sealing performance of the branch channel while improving the movement stability of the sliding valve core and reducing the risk of leakage due to wear.

[0021] This device, through the combined design of diffuser and baffle, enables a smooth transition when fluid flows out of the branch channel, and further optimizes the distribution characteristics of the outlet flow rate through the adjustment function of the baffle.

[0022] This device, through the installation of pressure sensors, can monitor pressure changes in the main channel in real time, providing accurate feedback information for flow control, thereby improving the accuracy and response speed of flow control.

[0023] The device reduces turbulence at the inlet of the branch channel by using a tapered head design at the front end of the sliding valve core, thus improving the smoothness of fluid flow. At the same time, the buffer pad design at the tail end reduces the impact force generated during the movement of the sliding valve core, extending the service life of the device.

[0024] In summary, this utility model achieves innovations in multi-segment regulation, dynamic switching, and structural simplification of flow control devices through the synergistic effect of components such as segmented valve groups, transmission components, and drive mechanisms. It solves the shortcomings of existing technologies and has high practical value and promising prospects for promotion. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of the segmented flow control device of this utility model.

[0027] Figure 2 This is a schematic diagram of the connection structure between the slider and the transmission component in this utility model.

[0028] Figure 3 This is a schematic diagram of the drive mechanism in this utility model.

[0029] Figure 4 This is a schematic diagram of the diffuser and baffle at the outlet of the branch channel in this utility model.

[0030] Figure 5 This is a partially enlarged schematic diagram of the sliding valve core in this utility model.

[0031] The attached figures are labeled as follows:

[0032] 1. Main channel; 2. Branch channel; 3. Segmented valve assembly; 4. Sliding valve core; 5. Drive mechanism; 6. Slide groove; 7. Slider; 8. Connecting rod; 9. Transmission assembly; 10. Sealing ring; 11. Guide rod; 12. Spring; 13. Stepper motor; 14. Lead screw; 15. Limit block; 16. Diffuser; 17. Baffle; 18. Pressure sensor. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0034] This utility model provides a segmented flow control device, the specific implementation of which is described in conjunction with the appendix. Figure 1 To be continued Figure 5 Please provide a detailed explanation. For example... Figure 1 As shown, the device includes a main channel 1, branch channels 2, segmented valve groups 3, and a drive mechanism 5. Multiple branch channels 2 are arranged axially along the main channel 1, and are sequentially arranged along the length of the main channel 1. Each branch channel 2 has an independent sliding valve core 4 at its inlet. These sliding valve cores 4 together constitute the segmented valve group 3. The sliding valve cores 4 are connected to the drive mechanism 5 via a transmission assembly 9, and the drive mechanism 5 achieves synchronous or independent movement of the sliding valve cores 4 through the transmission assembly 9.

[0035] A groove 6 is formed along the length of the top of the main channel 1, and a slider 7 is installed within the groove 6. The bottom of the slider 7 has a protrusion that fits into and slides within the groove 6. The top of the slider 7 is connected to the output end of the drive mechanism 5, and the drive mechanism 5 drives the transmission assembly 9 to move along the groove 6 via the slider 7. Figure 2 As shown, the transmission assembly 9 consists of multiple connecting rods 8. One end of each connecting rod 8 is hinged to the slider 7, and the other end is hinged to the corresponding sliding valve core 4. The middle part of the connecting rod 8 is rotatably connected to the outer wall of the main channel 1 via a rotating shaft. The rotation of the connecting rod 8 converts the linear motion of the slider 7 into the axial displacement of the sliding valve core 4. This structural design allows the sliding valve core 4 to precisely adjust the opening of the branch channel 2 according to actual needs, thereby achieving segmented flow control.

[0036] The specific structure of the drive mechanism 5 is as follows: Figure 3As shown, it includes a stepper motor 13 and a lead screw 14. The output shaft of the stepper motor 13 is fixedly connected to one end of the lead screw 14, and the other end of the lead screw 14 is rotatably connected to the outer wall of the main channel 1 through a bearing seat. The top of the slider 7 is provided with a threaded hole, which is threadedly engaged with the lead screw 14. The stepper motor 13 drives the slider 7 to move along the slide groove 6 through the lead screw 14. The rotational motion of the stepper motor 13 is converted into the linear motion of the slider 7 through the lead screw 14, thereby driving the transmission assembly 9 and the sliding valve core 4 to complete the corresponding actions. The outer wall of the main channel 1 is also provided with multiple limit blocks 15, which are evenly distributed along the length of the slide groove 6. The top of the limit block 15 is provided with a groove, and a ball is installed in the groove. The ball rolls in contact with the bottom of the slider 7 to reduce the friction between the slider 7 and the slide groove 6. This design not only improves the smoothness of the slider 7's movement but also extends the service life of the slide groove 6.

[0037] The specific structure of the sliding valve core 4 is as follows: Figure 5 As shown, the outer wall of the sliding valve core 4 is provided with a sealing ring 10, which fits tightly against the inner wall of the inlet of the branch channel 2 to ensure the sealing performance of the branch channel 2 in the closed state. A guide rod 11 is provided at the tail of the sliding valve core 4, which passes through the side wall of the branch channel 2 and is slidably connected to the branch channel 2. A spring 12 is provided on the outer wall of the guide rod 11, one end of which is fixedly connected to the outer wall of the branch channel 2, and the other end is fixedly connected to the tail of the sliding valve core 4, used to apply a reset force to the sliding valve core 4. When the sliding valve core 4 is subjected to external force, the spring 12 can provide a certain buffering effect, and simultaneously reset the sliding valve core 4 to its initial position after losing its driving force. A conical head is provided at the front end of the sliding valve core 4, and the outer wall of the conical head fits against the inner wall of the inlet of the branch channel 2 to reduce turbulence at the inlet of the branch channel 2. A buffer pad is provided at the tail of the sliding valve core 4, which contacts the inner wall of the branch channel 2 to reduce the impact force generated by the sliding valve core 4 during movement.

[0038] A diffuser 16 is provided at the outlet of branch channel 2. The specific structure of the diffuser 16 is as follows: Figure 4 As shown, the inner wall of diffuser 16 is tapered to smoothly transition the fluid flow direction from branch channel 2 to the external environment. A baffle 17 is provided at the outlet end of diffuser 16, which is rotatably connected to the outer wall of diffuser 16 via a hinge. The rotation of baffle 17 adjusts the outlet area of ​​diffuser 16. A tension spring is provided on the outer wall of baffle 17, with one end fixedly connected to baffle 17 and the other end fixedly connected to the outer wall of diffuser 16, to apply a restoring force to baffle 17. A flange is provided at the bottom of baffle 17, which fits against the outlet end face of diffuser 16 to enhance the sealing performance when baffle 17 is closed. By adjusting the angle of baffle 17, the flow distribution characteristics of the fluid after flowing out of branch channel 2 can be further optimized.

[0039] Multiple detection ports are located at the bottom of the main channel 1, evenly distributed along its length. Pressure sensors 18 are installed within each detection port, with their probes connected to the inner cavity of the main channel 1 for real-time monitoring of pressure changes. The pressure data collected by the pressure sensors 18 is fed back to the control system, which adjusts the operating state of the drive mechanism 5 based on the pressure changes, thereby achieving precise flow control. This design allows the device to dynamically adjust the flow distribution ratio according to operating conditions in practical applications, meeting multi-stage flow requirements.

[0040] The working principle of this invention is as follows: When flow rate adjustment is required, the control system sends a command to the stepper motor 13 according to actual needs. The stepper motor 13 drives the slider 7 to move along the slide groove 6 via the lead screw 14. The movement of the slider 7 is transmitted to the sliding valve core 4 through the transmission assembly 9. The sliding valve core 4 moves axially along the branch channel 2 to change the opening of the branch channel 2. Since the number of sliding valve cores 4 is the same as the number of branch channels 2, the flow rate of different branch channels 2 can be precisely controlled by independently or synchronously adjusting the position of each sliding valve core 4. When the fluid passes through the branch channel 2, the diffuser 16 smoothly transitions the flow direction of the fluid to the external environment, while the baffle 17 further optimizes the distribution characteristics of the outlet flow rate by adjusting the angle. The pressure sensor 18 monitors the pressure changes in the main channel 1 in real time and feeds the data back to the control system. The control system dynamically adjusts the working state of the drive mechanism 5 according to the pressure changes, thereby improving the accuracy and response speed of flow control.

[0041] The above embodiments illustrate the specific structure and operation process of the segmented flow control device of this utility model. Through the coordinated action of components such as the segmented valve group 3, the transmission component 9, and the drive mechanism 5, the device achieves innovations in multi-segment adjustment, dynamic switching, and structural simplification of the flow control device, solves the shortcomings of the prior art, and has high practical value and promotion prospects.

[0042] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0043] In the fluid transport system of a chemical plant, it is necessary to dynamically adjust the flow distribution ratio of different sections according to actual production needs. This scenario requires the flow control device to have segmented adjustment capabilities to adapt to changing process conditions. The segmented flow control device of this invention achieves precise flow regulation through the following steps.

[0044] First, when the control system receives a flow regulation command, the stepper motor 13 starts and drives the slider 7 to move along the slide groove 6 via the lead screw 14. The movement of the slider 7 is ensured to be smooth by the cooperation of the ball bearings and the limit block 15, while reducing the friction between the slide groove 6 and the slider 7, ensuring long-term operational reliability. The linear motion of the slider 7 is transmitted to the sliding valve core 4 through the transmission assembly 9, where one end of the connecting rod 8 is hinged to the slider 7 and the other end is connected to the sliding valve core 4, and the middle part of the connecting rod 8 is rotatably connected to the outer wall of the main channel 1 through a rotating shaft. This design converts the linear motion of the slider 7 into the axial displacement of the sliding valve core 4, thereby changing the opening of the branch channel 2. Since the number of sliding valve cores 4 is the same as that of the branch channels 2, the flow requirements of different sections can be met by independently or synchronously adjusting the position of each sliding valve core 4.

[0045] Secondly, the design of the diffuser 16 plays a crucial role when the fluid passes through branch channel 2. The inner wall of the diffuser 16 has a conical structure, which smoothly transitions the fluid from branch channel 2 to the external environment, reducing turbulence caused by abrupt changes in fluid direction. The baffle 17 is connected to the diffuser 16 via a hinge and maintains a certain rebound force under the action of a tension spring. When further optimization of the outlet flow distribution is required, the baffle 17 can be adjusted manually or automatically to change the outlet area of ​​the diffuser 16, thereby achieving precise control over the fluid flow distribution characteristics. The flange at the bottom of the baffle 17 fits tightly against the outlet end face of the diffuser 16, enhancing the sealing performance in the closed state and avoiding the risk of fluid leakage.

[0046] Furthermore, pressure changes within the main channel 1 are monitored in real time by a pressure sensor 18. The pressure sensor 18 is installed in a detection port at the bottom of the main channel 1, with its probe communicating with the inner cavity of the main channel 1. It accurately collects pressure data and feeds the information back to the control system. The control system dynamically adjusts the operating state of the stepper motor 13 based on pressure changes, thereby achieving adaptive flow regulation. For example, when the pressure within the main channel 1 increases, the control system sends a command to the stepper motor 13 to drive the slider 7 to move, thereby reducing the opening of part of the branch channel 2 to decrease the total flow rate; conversely, when the pressure decreases, the opening of the branch channel 2 is increased to increase the flow rate. This closed-loop control method significantly improves the accuracy and response speed of flow regulation.

[0047] During the movement of the sliding valve core 4, the cooperation between the guide rod 11 and the spring 12 plays a crucial role. The guide rod 11 penetrates the side wall of the branch channel 2 and is fixedly connected to the sliding valve core 4, ensuring the stability of the sliding valve core 4 during axial movement. One end of the spring 12 is fixedly connected to the outer wall of the branch channel 2, and the other end is connected to the tail of the sliding valve core 4, providing a restoring force for the sliding valve core 4. When the sliding valve core 4 loses its driving force, the spring 12 can automatically return it to its initial position. At the same time, the design of the buffer pad reduces the impact force generated when the sliding valve core 4 contacts the inner wall of the branch channel 2 during movement, extending the service life of the device.

[0048] Finally, the tapered head design at the front end of the sliding valve core 4 effectively reduces turbulence at the inlet of branch channel 2. The outer wall of the tapered head fits tightly against the inner wall of the inlet of branch channel 2, making the fluid flow more smoothly when entering branch channel 2. At the same time, the sealing ring 10 on the outer wall of the sliding valve core 4 fits tightly against the inner wall of the inlet of branch channel 2, ensuring good sealing performance of branch channel 2 in the closed state and avoiding flow loss due to leakage.

[0049] In summary, the segmented flow control device of this invention achieves segmented adjustment and dynamic switching of flow rate through the coordinated action of components such as slider 7, transmission assembly 9, and sliding valve core 4. In practical applications, this device can quickly adjust the flow distribution ratio of each branch channel 2 according to operating conditions, while optimizing the flow distribution characteristics of the fluid through the combined design of diffuser 16 and baffle 17. The introduction of pressure sensor 18 further improves the accuracy and response speed of flow control, making this device widely applicable in fluid control systems in chemical, pharmaceutical, and other fields.

[0050] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A segmented flow control device, comprising a main channel (1), a branch channel (2), a segmented valve group (3), and a drive mechanism (5), characterized in that: It also includes multiple branch channels (2) connected to the main channel (1), and the branch channels (2) are arranged sequentially along the axial direction of the main channel (1); The segmented valve group (3) consists of multiple independent sliding valve cores (4), each sliding valve core (4) being installed at the inlet of the corresponding branch channel (2); The drive mechanism (5) is connected to the sliding valve core (4) via the transmission assembly (9) and is used to drive the sliding valve core (4) to move axially along the branch channel (2) to change the opening degree of the branch channel (2).

2. The segmented flow control device according to claim 1, characterized in that, The top of the main channel (1) is provided with a groove (6) along its length, and a slider (7) is installed in the groove (6). The bottom of the slider (7) is provided with a protrusion, which is embedded in the slide groove (6) and slides in cooperation with the slide groove (6); The top of the slider (7) is connected to the output end of the drive mechanism (5), and the drive mechanism (5) drives the transmission component (9) to move along the slide groove (6) through the slider (7).

3. The segmented flow control device according to claim 2, characterized in that, The transmission assembly (9) includes multiple connecting rods (8), one end of each connecting rod (8) is hinged to the slider (7), and the other end is hinged to the corresponding sliding valve core (4); The middle part of the connecting rod (8) is rotatably connected to the outer wall of the main channel (1) through a rotating shaft. The rotation of the connecting rod (8) converts the linear motion of the slider (7) into the axial displacement of the sliding valve core (4).

4. The segmented flow control device according to claim 1, characterized in that, The outer wall of the sliding valve core (4) is provided with a sealing ring (10), and the sealing ring (10) is tightly fitted with the inner wall of the inlet of the branch channel (2); The tail of the sliding valve core (4) is provided with a guide rod (11), which passes through the side wall of the branch channel (2) and is slidably connected to the branch channel (2). The outer wall of the guide rod (11) is provided with a spring (12). One end of the spring (12) is fixedly connected to the outer wall of the branch channel (2), and the other end is fixedly connected to the tail of the sliding valve core (4).

5. A segmented flow control device according to claim 2, characterized in that, The drive mechanism (5) includes a stepper motor (13) and a lead screw (14). The output shaft of the stepper motor (13) is fixedly connected to one end of the lead screw (14), and the other end of the lead screw (14) is rotatably connected to the outer wall of the main channel (1) through a bearing seat. The top of the slider (7) is provided with a threaded hole, which is threadedly engaged with the lead screw (14). The stepper motor (13) drives the slider (7) to move along the slide groove (6) through the lead screw (14).

6. A segmented flow control device according to claim 2, characterized in that, The outer wall of the main channel (1) is provided with multiple limiting blocks (15), and the limiting blocks (15) are evenly distributed along the length direction of the slide groove (6); The top of the limiting block (15) is provided with a groove, and a ball is installed in the groove. The ball rolls in contact with the bottom of the slider (7).

7. A segmented flow control device according to claim 1, characterized in that, A diffuser (16) is provided at the outlet of the branch channel (2), and the inner wall of the diffuser (16) is designed in a conical shape. The diffuser (16) is provided with a baffle (17) at the outlet end, and the baffle (17) is rotatably connected to the outer wall of the diffuser (16) by a hinge.

8. A segmented flow control device according to claim 7, characterized in that, The outer wall of the baffle (17) is provided with a tension spring, one end of which is fixedly connected to the baffle (17) and the other end is fixedly connected to the outer wall of the diffuser (16); The bottom of the baffle (17) is provided with a flange, which is in contact with the outlet end face of the diffuser (16).

9. A segmented flow control device according to claim 1, characterized in that, The bottom of the main channel (1) is provided with multiple detection ports, which are evenly distributed along the length of the main channel (1); A pressure sensor (18) is installed inside the detection port, and the probe of the pressure sensor (18) is connected to the inner cavity of the main channel (1).

10. A segmented flow control device according to claim 1, characterized in that, The front end of the sliding valve core (4) is provided with a conical head, and the outer wall of the conical head is in contact with the inner wall of the inlet of the branch channel (2); The tail of the sliding valve core (4) is provided with a buffer pad, which contacts the inner wall of the branch channel (2).

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