Flow control system

Abstract

The utility model discloses a flow control system, relates to the technical field of automatic control, and mainly aims to realize stable and accurate flow control and guarantee the uniformity and accuracy of raw material supply so as to improve the consistency of product quality. According to the main technical scheme, the flow control system comprises a conveying main pipe and a plurality of conveying branch pipes, the conveying main pipe is used for communicating a raw material tank with the multiple conveying branch pipes, the multiple conveying branch pipes are arranged in parallel, and each conveying branch pipe is provided with a backflow pipe and a first pressure sensor; the return pipe is used for communicating the conveying branch pipe with the raw material tank, and a first regulating valve is arranged on the return pipe; the flow control system further comprises a control device, and the control device is respectively connected with the first pressure sensor and the first adjusting valve.

Description

Technical Field

[0001] The present application belongs to the field of automation control technology, and specifically relates to a flow control system. Background Art

[0002] Modern industrial production processes involve a large number of raw material transportation operations. Whether in the chemical, pharmaceutical, food processing, or other similar industries, accurate raw material transportation is crucial to ensuring product quality and production efficiency. Raw materials are typically stored in raw material tanks and need to be transported to various production links or processing equipment through a pipeline system. However, this process lacks effective flow feedback and control mechanisms. Any changes in pressure or flow at any link in the system can lead to instability of the entire transportation system, affecting production quality and even causing safety issues. Utility Model Content

[0003] In view of this, the present application provides a flow control system, the main purpose of which is to achieve stable and precise flow control, ensure the uniformity and accuracy of raw material supply, and thus improve the consistency of product quality.

[0004] To achieve the above objectives, this application mainly provides the following technical solutions:

[0005] The present application provides a flow control system, comprising:

[0006] A main delivery pipe and multiple branch delivery pipes, wherein the main delivery pipe is used to connect the raw material tank and the multiple branch delivery pipes, the multiple branch delivery pipes are arranged in parallel, and each branch delivery pipe is provided with a return pipe and a first pressure sensor, the return pipe is used to connect the delivery branch pipe and the raw material tank, and the return pipe is provided with a first regulating valve;

[0007] Wherein, the flow control system further includes a control device, and the control device is connected to the first pressure sensor and the first regulating valve respectively.

[0008] Optionally, the first pressure sensor is located on the downstream side of the connection point between the return pipe and the delivery branch pipe in the flow path direction.

[0009] Optionally, each of the delivery branches is further provided with a flow sensor and a second regulating valve, and both the flow sensor and the second regulating valve are connected to the control device.

[0010] Optionally, the flow sensor and the second regulating valve are located downstream of the first pressure sensor in the flow path direction.

[0011] Optionally, the flow sensor is located upstream of the second regulating valve in the flow path direction.

[0012] Optionally, the flow control system further includes a plurality of delivery pumps, and the plurality of delivery pumps are arranged on the plurality of delivery branches in a one-to-one correspondence.

[0013] Optionally, the flow control system further includes a plurality of nozzles, and the plurality of nozzles are arranged at the outlets of the plurality of delivery branches in a one-to-one correspondence.

[0014] Optionally, the flow control system further includes a plurality of pre-filling pipes, and the plurality of pre-filling pipes are connected to the plurality of nozzles in a one-to-one correspondence.

[0015] Optionally, the flow control system further includes a plurality of second pressure sensors, and the plurality of second pressure sensors are disposed at the ends of the plurality of delivery branches in a one-to-one correspondence.

[0016] Optionally, the flow control system further includes a plurality of sewage pipes, and the plurality of sewage pipes are connected to the ends of the plurality of delivery branches in a one-to-one correspondence.

[0017] By means of the above technical solution, this application has at least the following beneficial effects:

[0018] In the flow control system provided in the embodiments of the present application, a first pressure sensor is provided on each delivery branch, which can sense the pressure conditions within the delivery branch in real time. Since flow and pressure are closely related, the control device can accurately adjust the flow of each delivery branch by adjusting the first regulating valve on the return pipe based on the signal transmitted by the pressure sensor, so that each delivery branch can accurately supply raw materials according to production needs and meet the specific flow requirements of different production links. Whether it is a high-precision chemical reaction or a flow-sensitive food processing process, the accuracy of the flow can be ensured. Furthermore, the structure of multiple delivery branches in parallel is combined with the example of the return pipe and the regulating valve. When a delivery branch causes abnormal pressure due to external factors (such as sudden pressure changes in the equipment connected to it, partial blockage of the delivery branch, etc.), the flow of the delivery branch can be quickly adjusted through the return pipe and the first regulating valve. It can be understood that the above-mentioned local adjustment scheme can effectively prevent pressure fluctuations from propagating throughout the system, avoiding the problem of one delivery branch affecting the stable operation of other branches or even the entire delivery system, thereby ensuring the stability of the system under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a flow control system according to an optional embodiment of the present application.

[0020] The reference numerals indicate:

[0021] 1. Raw material tank; 2. Delivery main pipe; 3. Delivery branch pipe; 4. Return pipe; 5. First pressure sensor; 6. First regulating valve; 7. Control device; 8. Flow sensor; 9. Second regulating valve; 10. Delivery pump; 11. Nozzle; 12. Pre-filling pipe; 13. Second pressure sensor; 14. Drain pipe. DETAILED DESCRIPTION

[0022] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0024] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0025] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0026] See also Figure 1As shown, according to an embodiment of the present application, a flow control system is provided, including: a conveying main pipe 2 and multiple conveying branch pipes 3, the conveying main pipe 2 is used to connect the raw material tank 1 and the multiple conveying branch pipes 3, the multiple conveying branch pipes 3 are arranged in parallel, and each conveying branch pipe 3 is provided with a return pipe 4 and a first pressure sensor 5, the return pipe 4 is used to connect the conveying branch pipe 3 and the raw material tank 1, and the return pipe 4 is provided with a first regulating valve 6; wherein, the flow control system also includes a control device 7, and the control device 7 is respectively connected to the first pressure sensor 5 and the first regulating valve 6.

[0027] In this embodiment, a first pressure sensor 5 is provided on each delivery branch 3 to sense the pressure within the delivery branch 3 in real time. Since flow and pressure are closely related, the control device 7 can precisely adjust the flow rate of each delivery branch 3 by adjusting the first regulating valve 6 on the return pipe 4 based on the signal transmitted by the pressure sensor. This allows each delivery branch 3 to accurately supply raw materials according to production needs, meeting the specific flow requirements of different production links. Whether it is a high-precision chemical reaction or a flow-sensitive food processing step, the accuracy of the flow rate can be ensured. Furthermore, the structure of multiple delivery branches 3 connected in parallel, combined with the example of the return pipe 4 and the regulating valve, allows for the rapid adjustment of the flow rate of a delivery branch 3 due to external factors (such as sudden pressure changes in connected equipment, partial blockage of the delivery branch, etc.). The return pipe 4 and the first regulating valve 6 can be used to quickly adjust the flow rate of the delivery branch 3. It can be understood that this local adjustment scheme can effectively prevent pressure fluctuations from propagating throughout the entire system, preventing problems in one delivery branch from affecting the stable operation of other branches or even the entire delivery system, thereby ensuring the stability of the system under complex working conditions.

[0028] Here, the raw materials can be a variety of substances that need to be transported and flow-controlled in industrial production, including but not limited to liquid chemicals, food raw materials, pharmaceutical raw materials, etc. In this embodiment, the raw material is a pulp for preparing tobacco leaves, which has a certain viscosity and special physical and chemical properties. In this case, the flow control system is crucial to ensure that the pulp is accurately and stably transported to subsequent production links. Since the properties of the pulp may have a unique impact on the pressure of the pipeline, for example, the particulate components it contains may produce friction with the pipeline wall during the flow process, or exhibit different fluidity at different temperatures, thereby affecting the pressure change in the delivery branch 3. Therefore, in the delivery network composed of the delivery main pipe 2 and a plurality of parallel delivery branches 3, the feedback regulation mechanism of the return pipe 4, the first pressure sensor 5 and the first regulating valve 6 on the return pipe 4 provided on each delivery branch 3, which work in coordination is particularly critical. The pressure in the delivery branch pipe 3 containing the slurry is monitored in real time by the first pressure sensor 5, and the control device 7 controls the opening of the first regulating valve 6 on the return pipe 4 according to the pressure data, so as to accurately adjust the flow rate of the slurry, ensuring that each production link using the slurry can obtain a stable and appropriate flow of raw materials, thereby ensuring the smooth progress of the tobacco preparation process.

[0029] Among them, the conveying main pipe 2 is the main conveying channel of the entire system. One end of it is connected to the raw material tank 1, and the other end is connected to multiple conveying branches 3. It is used to lead the raw materials out of the raw material tank 1 and provide a basis for the subsequent conveying of raw materials to various conveying branches.

[0030] Among them, multiple delivery branch pipes 3 are independent of each other in the system and are simultaneously connected to the delivery main pipe 2. Each branch pipe can deliver raw materials to different production links or equipment.

[0031] Each branch pipe 3 is equipped with a return pipe 4, which connects the branch pipe 3 to the raw material tank 1, forming a loop. Its primary function is to return some of the raw material to the raw material tank 1 when flow regulation is required. For example, if the flow rate of a branch pipe 3 is too high, the return pipe 4 can be used to return the excess raw material to the raw material tank 1, thereby controlling the flow rate of that branch pipe 3.

[0032] The first pressure sensor 5 installed on the delivery branch pipe 3 monitors the pressure of the raw material flowing within the branch pipe in real time. Because flow rate and pressure are related in fluid mechanics, monitoring pressure can indirectly reveal flow conditions. For example, an increase in pressure may indicate an increasing flow rate, while a decrease in pressure may indicate a decrease in flow rate. This provides critical data for subsequent flow control.

[0033] The reflux pipe 4 is equipped with a first regulating valve 6, which is connected to a control device 7 and can adjust its opening according to commands from the control device 7. When the branch pipe flow needs to be adjusted, the control device 7 sends a signal to the first regulating valve 6 based on data from the pressure sensor, causing it to change its opening. To reduce the flow rate, the regulating valve opening can be increased to allow more material to flow back through the reflux pipe 4. To increase the flow rate, the valve opening can be decreased to reduce reflux.

[0034] The control device 7 is the core of the entire flow control system. It is connected to the first pressure sensor 5 and the first regulating valve 6, forming a closed-loop control system. The control device 7 continuously receives pressure data from the first pressure sensor 5 and analyzes and processes this data according to a pre-set algorithm or program. When the pressure data indicates that the flow rate deviates from the set value, the control device 7 promptly sends a control signal to the first regulating valve 6 to adjust its opening, thereby achieving precise control of the flow rate in the delivery branch pipe 3. This automatic control scheme ensures that the system can maintain a stable and accurate flow rate under various operating conditions.

[0035] Specifically, in practical applications, the control device 7, first pressure sensor 5, return pipe 4, and first regulating valve 6 together form a closed-loop, post-feedback regulation mechanism. After detecting pressure changes, the pressure sensor transmits this information to the control device 7. After computational analysis, the control device 7 issues a command to the first regulating valve 6. The regulating valve adjusts the flow rate in the delivery branch pipe 3 by changing the flow rate in the return pipe 4, which in turn causes a change in the branch pipe pressure. This new pressure change is again sensed by the pressure sensor, and this cycle repeats. Through this continuous feedback regulation, the system can quickly and accurately respond to flow fluctuations caused by various internal and external factors, consistently maintaining a stable flow rate in the delivery branch pipe 3 and meeting the strict raw material flow requirements of the production process. It should be noted that when the opening of the first regulating valve 6 increases, the resistance in the return pipe 4 decreases, allowing more raw material to flow back to the raw material tank 1 through the return pipe 4, thereby reducing the raw material flow from the delivery branch pipe 3 to the production equipment. Conversely, when the opening of the first regulating valve 6 decreases, the resistance in the return pipe 4 increases, reducing the amount of refluxed raw material and increasing the flow rate in the delivery branch pipe 3. This ensures that in the event of pressure fluctuations, the system can adjust the flow in a timely manner to maintain stable production.

[0036] In the above embodiment, see Figure 1 As shown, the first pressure sensor 5 is located on the downstream side of the connection point between the return pipe 4 and the delivery branch pipe 3 in the flow path direction.

[0037] In this embodiment, the first pressure sensor 5 is located downstream of the connection point between the return pipe 4 and the delivery branch pipe 3. This prevents the pressure measurement from being directly affected by the material reflow in the return pipe 4. It will be appreciated that in this location, the first pressure sensor 5 primarily senses the pressure generated by the forward flow of the material and is unaffected by complex pressure fluctuations that may occur during the reflow process (such as local negative pressure generated by the reflow or pressure changes caused by turbulence). This allows the sensor to provide a more accurate pressure signal for determining the actual delivery flow rate.

[0038] The flow direction for the delivery branch pipe 3 is the direction in which the raw material flows from the delivery main pipe 2 into the delivery branch pipe 3 and then flows along the branch pipe to the destination such as the connected production equipment.

[0039] The connection point between the return pipe 4 and the delivery branch pipe 3 is the position where the return pipe 4 connects to the delivery branch pipe 3 .

[0040] Specifically, in actual applications, when the raw material flows in the delivery branch pipe 3 , the raw material first passes through the connection point between the return pipe 4 and the delivery branch pipe 3 , and then reaches the position where the pressure sensor is located.

[0041] In some possible implementations disclosed in this application, see Figure 1 As shown, each delivery branch pipe 3 is further provided with a flow sensor 8 and a second regulating valve 9 , and both the flow sensor 8 and the second regulating valve 9 are connected to the control device 7 .

[0042] In this embodiment, flow sensors 8 are installed, allowing the system to directly measure the raw material flow rate in each delivery branch 3. Unlike relying solely on pressure sensors to indirectly infer flow rate, flow sensors 8 provide more direct and accurate flow rate data. Furthermore, flow sensors 8 are connected to control device 7, enabling real-time flow rate monitoring. Control device 7 can acquire flow rate data at any time and compare it with preset flow rate values. If flow rate deviates from the set range, immediate action can be taken to adjust the flow rate. This effectively prevents production problems caused by abnormal flow rates.

[0043] Flow sensor 8 is a device used to measure fluid flow in a pipeline. In this embodiment, flow sensor 8 is installed on each delivery branch pipe 3. Its primary function is to accurately obtain information on the flow rate of raw materials passing through that delivery branch pipe 3. Its operating principles can be based on a variety of physical phenomena. For example, a differential pressure flow sensor 8 calculates flow rate by using the pressure difference generated when a fluid flows through a throttling device. An electromagnetic flow sensor 8 determines flow rate based on Faraday's law of electromagnetic induction by measuring the induced electromotive force generated by the movement of a conductive liquid in a magnetic field.

[0044] The second regulating valve 9 is used to directly control the flow of raw materials through the delivery branch pipe 3. Specifically, by varying its opening, the second regulating valve 9 adjusts the cross-sectional area of ​​the raw materials flowing through the branch pipe, thereby varying the flow rate. It will be appreciated that, unlike the first regulating valve 6 located on the return pipe 4, the second regulating valve 9 directly operates on the delivery branch pipe 3 to control the flow of raw materials to the production equipment.

[0045] Flow sensor 8 and second regulating valve 9 are both connected to control device 7. In actual use, flow sensor 8 monitors the flow rate in branch pipe 3 in real time and transmits this information to control device 7. Based on the difference between the flow rate data and the set value, control device 7 issues a control instruction to second regulating valve 9. Second regulating valve 9 executes the instruction and adjusts its opening to change the flow rate. This process is a continuous, closed-loop, forward-feedback control process.

[0046] Specifically, the control device 7 continuously monitors and analyzes the data from the flow sensor 8, thereby achieving dynamic regulation of the flow rate. During the production process, various factors (such as changes in equipment status, fluctuations in raw material properties, etc.) may cause the flow rate to fluctuate continuously. The control device 7 uses this dynamic regulation mechanism to continuously adjust the second regulating valve 9 to ensure that the flow rate is always maintained near the set value. It should be noted that the above-mentioned forward feedback regulation mechanism effectively avoids the impact of excessive flow deviation on production by obtaining flow information in advance and adjusting the second regulating valve 9 in a timely manner, thereby improving production stability and product quality.

[0047] It should be noted that a single regulation mechanism may have limitations when controlling the flow of specialized fluids. In this embodiment, the flow control system, combining both forward and backward feedback mechanisms, can ensure flow accuracy under a wider range of operating conditions. Whether in specialized fluid delivery scenarios such as high-precision chemical reactions or flow-sensitive food processing, it can better meet the stringent requirements of production processes for raw material flow, ensuring smooth production. This makes the entire flow control system more intelligent and reliable, capable of handling complex and changing production environments. Specifically, the forward feedback mechanism directly controls flow based on accurate measurement data from flow sensor 8, while the backward feedback mechanism indirectly reflects and adjusts flow through a pressure sensor. The combination of these two mechanisms effectively controls flow under various flow variations, such as those directly caused by changes in raw material properties or pressure changes caused by external factors that affect flow. For example, if the raw material properties change slightly, flow sensor 8 can quickly detect the flow change, and control device 7 can adjust the flow through second regulating valve 9. If pressure fluctuations due to equipment failure occur simultaneously, the backward feedback mechanism composed of first pressure sensor 5 and first regulating valve 6 can also respond promptly to stabilize the flow.

[0048] In the above embodiment, see Figure 1As shown, the flow sensor 8 and the second regulating valve 9 are located on the downstream side of the first pressure sensor 5 in the flow path direction.

[0049] In this embodiment, placing the flow sensor 8 on the downstream side of the first pressure sensor 5 can ensure that the measured flow is the actual flow after passing the location of the pressure sensor, and can more accurately reflect the true state of the fluid flow after passing the pressure monitoring point.

[0050] In the above embodiment, see Figure 1 As shown, the flow sensor 8 is located upstream of the second regulating valve 9 in the flow path direction.

[0051] In this embodiment, the flow sensor 8 is located on the upstream side of the second regulating valve 9 and can measure the flow rate of the fluid before it enters the second regulating valve 9. In this way, the most original flow information can be obtained, avoiding the measurement error caused by the change of the flow rate by the second regulating valve 9. In an actual fluid conveying system, the change in the opening of the second regulating valve 9 will directly affect the flow rate downstream thereof, while the flow sensor 8 upstream thereof will not be disturbed by such adjustment action and provide more accurate flow data. For example, in the slurry transportation scenario for preparing tobacco leaves, the flow sensor 8 can accurately measure the flow size and changes of the slurry before it is adjusted by the second regulating valve 9.

[0052] The first pressure sensor 5, flow sensor 8, and second regulating valve 9 are arranged sequentially along the flow path. That is, when the raw material flows through the delivery branch pipe 3, it first passes through the first pressure sensor 5 before reaching the flow sensor 8 and second regulating valve 9.

[0053] In some possible implementations disclosed in this application, see Figure 1 As shown, the flow control system further includes a plurality of delivery pumps 10 , and the plurality of delivery pumps 10 are disposed on the plurality of delivery branches 3 in a one-to-one correspondence.

[0054] In this embodiment, an independent delivery pump 10 is provided on each delivery branch 3, which can provide a non-interfering power source for the fluid delivery of each delivery branch, so that the system can accurately adjust the output power of the corresponding delivery pump 10 according to the specific flow requirements of each delivery branch, ensuring that each delivery branch can obtain accurate flow supply, fundamentally avoiding flow errors caused by insufficient power or uneven power distribution.

[0055] The delivery pump 10 may be a screw pump. In practical applications, when the system includes three delivery branches, three delivery pumps 10 are provided, and each delivery pump 10 is responsible for providing power for one delivery branch.

[0056] In some possible implementations disclosed in this application, see Figure 1 As shown, the flow control system further includes a plurality of nozzles 11 , which are disposed at the outlets of the plurality of delivery branches 3 in a one-to-one correspondence.

[0057] In this embodiment, a nozzle 11 is installed at the outlet of the delivery branch pipe 3 to evenly disperse the delivered raw materials. For example, when slurry is delivered during tobacco production, when the slurry is sprayed through the nozzle 11, it is more evenly distributed in the target area. This ensures uniform coverage of the tobacco processing area, ensuring that the tobacco processing area receives the appropriate amount of slurry, thereby improving tobacco quality.

[0058] In some possible implementations disclosed in this application, see Figure 1 As shown, the flow control system further includes a plurality of pre-filling pipes 12 , and the plurality of pre-filling pipes 12 are connected to the plurality of nozzles 11 in a one-to-one correspondence.

[0059] In this embodiment, by providing the pre-filling pipe 12, the conveying main pipe 2 and the conveying branch pipe 3 can be pre-filled with raw materials before the system is started, preventing the raw materials from suddenly entering the empty pipe and causing large pressure fluctuations, reducing the difficulty of subsequent flow control, and thus creating favorable conditions for subsequent stable transportation.

[0060] Before the flow control system is activated, delivery pump 10 is turned on. This operation causes the raw material in raw material tank 1 to flow, and the raw material is then delivered to branch delivery pipe 3 via the main delivery pipe. During this continuous delivery process, pre-filling pipe 12, connected to nozzle 11 at the outlet of branch delivery pipe 3, is observed. When raw material flows out of pre-filling pipe 12, it can be determined that branch delivery pipe 3 is fully filled with raw material.

[0061] In some possible implementations disclosed in this application, see Figure 1 As shown, the flow control system further includes a plurality of second pressure sensors 13 , and the plurality of second pressure sensors 13 are disposed at the ends of the plurality of delivery branches 3 in a one-to-one correspondence.

[0062] In this embodiment, a second pressure sensor 13 is provided at the end of the delivery branch pipe 3 to accurately measure the pressure of the raw material as it leaves the delivery branch pipe 3 and enters the next processing link (such as the nozzle 11). This allows for obtaining pressure data closest to the actual point of use. For example, in a slurry conveying system for tobacco production, after long-distance transportation through the delivery branch pipe 3, the pressure of the slurry may decrease at the end due to pipeline friction and various resistances. The second pressure sensor 13 can accurately capture this end pressure, providing the system with precise pressure information.

[0063] When the system includes three delivery branch pipes 3 , three second pressure sensors 13 are correspondingly provided, and the three second pressure sensors 13 are respectively installed at the rear end of each delivery branch pipe 3 .

[0064] In some possible implementations disclosed in this application, see Figure 1 As shown, the flow control system further includes a plurality of sewage pipes 14 , which are connected to the ends of the plurality of delivery branches 3 in a one-to-one correspondence.

[0065] In this embodiment, the provision of a drain pipe 14 provides a direct channel for cleaning the branch delivery pipe 3. For example, during the tobacco production process, after a period of use, solid particles from the slurry may adhere to the pipe walls of the main delivery pipe 2 and branch delivery pipe 3. Through the drain pipe 14, cleaning fluid can be conveniently introduced into the main delivery pipe and branch delivery pipe 3 for a thorough cleaning. The cleaning fluid, which contains impurities, is then discharged from the drain pipe 14, effectively keeping the main delivery pipe and branch delivery pipe 3 clean.

[0066] Each delivery branch pipe 3 is equipped with a sewage pipe 14 connected thereto. In this embodiment, three delivery branch pipes 3 are provided, and a sewage pipe 14 is provided on each of the three delivery branch pipes 3 in a one-to-one correspondence.

[0067] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0068] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application. The above are merely preferred embodiments of the present application. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present application, and such improvements and variations shall also be considered within the scope of protection of the present application.

Claims

1. A flow control system, characterized in that: include: A main delivery pipe (2) and a plurality of branch delivery pipes (3), wherein the main delivery pipe (2) is used to connect the raw material tank (1) and the plurality of branch delivery pipes (3), the plurality of branch delivery pipes (3) are arranged in parallel, and each branch delivery pipe (3) is provided with a return pipe (4) and a first pressure sensor (5), the return pipe (4) is used to connect the branch delivery pipe (3) and the raw material tank (1), and the return pipe (4) is provided with a first regulating valve (6); The flow control system further comprises a control device (7), and the control device (7) is connected to the first pressure sensor (5) and the first regulating valve (6) respectively.

2. The flow control system according to claim 1, characterized in that: The first pressure sensor (5) is located on the downstream side of the connection point between the return pipe (4) and the delivery branch pipe (3) in the flow path direction.

3. The flow control system according to claim 1, characterized in that: Each of the delivery branch pipes (3) is also provided with a flow sensor (8) and a second regulating valve (9), and both the flow sensor (8) and the second regulating valve (9) are connected to the control device (7).

4. The flow control system according to claim 3, characterized in that: The flow sensor (8) and the second regulating valve (9) are located on the downstream side of the first pressure sensor (5) in the flow path direction.

5. The flow control system according to claim 3, characterized in that: The flow sensor (8) is located on the upstream side of the second regulating valve (9) in the flow path direction.

6. The flow control system according to claim 1, characterized in that: The flow control system further comprises a plurality of delivery pumps (10), and the plurality of delivery pumps (10) are arranged on the plurality of delivery branch pipes (3) in a one-to-one correspondence.

7. The flow control system according to claim 1, characterized in that: The flow control system further comprises a plurality of nozzles (11), and the plurality of nozzles (11) are arranged at the outlets of the plurality of delivery branch pipes (3) in a one-to-one correspondence.

8. The flow control system according to claim 7, characterized in that: The flow control system further comprises a plurality of pre-filling pipes (12), and the plurality of pre-filling pipes (12) are connected to the plurality of nozzles (11) in a one-to-one correspondence.

9. The flow control system according to claim 1, characterized in that: The flow control system further comprises a plurality of second pressure sensors (13), and the plurality of second pressure sensors (13) are arranged at the ends of the plurality of delivery branch pipes (3) in a one-to-one correspondence.

10. The flow control system according to claim 1, characterized in that: The flow control system further comprises a plurality of sewage pipes (14), and the plurality of sewage pipes (14) are connected to the ends of the plurality of delivery branch pipes (3) in a one-to-one correspondence.

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