A multi-channel high-precision flow regulating valve

Abstract

The present application discloses a multi-channel high-precision flow regulating valve. There are multiple regulating valves, and multiple regulating valves are combined to form multiple groups of regulating valve groups corresponding to the paper, and each regulating valve group is signal-connected to the control system; the regulating valve includes a valve body and a water storage cavity formed in the valve body. The regulating valve further includes a valve core disposed on the valve body. The valve core extends into the water storage cavity and communicates with the water storage cavity. The valve core can move relative to the water storage cavity to change the flow area of the medium; the control system includes a control component and a quality monitoring component. The quality monitoring component is used to obtain the dryness, thickness of the paper, and the medium distribution of the paper and transmit them to the control component. The control component is drivingly connected to the valve core. Among them, the control component can drive the valve core in the regulating valve to move to adjust the valve opening of the corresponding regulating valve, and the adjustment range of the valve opening is 0-100%. The movement of the valve core in the regulating valve changes the flow area of the medium, so that the medium data in the paper area corresponding to the regulating valve group meets the requirements.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and particularly relates to a multi-channel high-precision flow regulating valve. Background Art

[0002] In the paper-making industry, with the development of technology, while the output is increased, higher requirements also need to be achieved for the quality of finished paper. One of the key factors affecting the paper quality is the cross-direction quality of the paper product, that is, the dryness, moisture distribution and thickness of the paper. In the cross-direction quality control, a regulating valve is usually required to control the flow rate.

[0003] Currently, the regulating valves used in the paper-making industry usually adopt pneumatic control or solenoid valve switch control. The principle of pneumatic control is that a pneumatic proportional valve adjusts the size of the fluid flow through the change of air pressure. Due to its design principle and the differences in on-site pipelines, it is difficult to accurately adjust the valve opening. For the regulating valve, after being used for a period of time, the set opening is lower than a certain value (non-0%) and the valve does not act, and higher than a certain value (non-100%) and the valve is fully open, which cannot effectively complete the control target of the system. The solenoid valve switch control is that the solenoid valve controls the opening and closing of the valve, and there are only two states of opening and closing. The flow rate adjustment is carried out through several pre-installed nozzles with different apertures. There are several nozzles corresponding to several flow rates, and the accurate control of the cross-direction quality cannot be achieved. Summary of the Invention

[0004] In view of the above deficiencies, the present invention provides a multi-channel high-precision flow regulating valve, which can adjust the valve opening in the regulating valve through the data of the paper, and has a wide adjustment range, and can achieve the accurate control of the paper quality.

[0005] The present invention is achieved through the following technical solutions:

[0006] A multi-way high-precision flow regulating valve, the regulating valve has multiple regulating valves, the multiple regulating valves are combined to form multiple regulating valve groups corresponding to paper, and each regulating valve group is connected to the control system signal; the regulating valve includes a valve body and a water storage cavity formed in the valve body, the regulating valve also includes a valve core arranged in the valve body, the valve core extends into the water storage cavity and communicates with the water storage cavity, and the valve core can move relative to the water storage cavity to change the flow area of the medium; the control system includes a control component and a quality monitoring component, the quality monitoring component is used to obtain the paper dryness, thickness and medium distribution of the paper and transmit them to the control component, the control component is connected to the valve core in a transmission manner, wherein the control component can drive the valve core in the regulating valve to move to adjust the valve opening of the corresponding regulating valve, and the adjustment range of the valve opening is 0-100%. There are multiple regulating valves, and multiple regulating valve groups are formed, and the comprehensive coverage of the paper is achieved through the multiple regulating valve groups. At the same time, the valve core in the regulating valve changes the flow area of the medium by moving to adjust the amount of medium sprayed to the paper, so that the medium data in the paper area corresponding to the regulating valve group meets the requirements.

[0007] Furthermore, when the regulating valve changes the valve opening, the valve core has a set moving distance and an actual moving distance, and the difference between the set moving distance and the actual moving distance is less than 0.1% of the set moving distance. The adjusted valve core position is kept close to the set position, so that the ejected medium meets the needs of papermaking within a certain error range, so that the adjusted paper meets the required medium quantity of the paper. When the hysteresis of the regulating valve is too large, for example, a pneumatic regulating valve is used, the response time of the control component becomes longer, and the parameters cannot be accurately controlled when the valve core is adjusted.

[0008] Furthermore, the minimum movement distance of the valve core is 0.02 mm. Since the movement of the valve core in the present application is driven by a motor, the movement distance of the valve core can be accurately controlled, and the movement distance of the valve core is relatively short. Therefore, when adjusting the flow rate, the valve core moves a relatively short distance under the control of the motor, so the adjustment amount of the flow rate will also be relatively small, thereby achieving accurate control of the flow rate.

[0009] Furthermore, the regulating valve also includes an outlet joint connected to the water storage chamber, and the flow area decreases or increases exponentially in the direction toward or away from the outlet joint. The medium in the water storage chamber is discharged from the outlet joint after the flow is controlled by the valve core, and the valve core can also change the flow area of the medium during the movement, that is, the valve opening in the regulating valve is adjusted, wherein when the flow area changes, the change of its area changes exponentially, which can not only meet the precise adjustment of the flow in a small range, but also can achieve a large range of changes in the flow when rapid adjustment is required.

[0010] Further, the valve core includes an adjusting groove formed to connect the water storage cavity and the outlet joint, and the width and / or depth of the adjusting groove varies along the extension direction of the outlet joint. When the adjusting groove varies, the width of the adjusting groove can be changed, for example, the width of the adjusting groove gradually increases in the direction toward the outlet joint, thereby realizing an exponential change in the flow area, or the adjusting groove can also be set to be of equal width, but the depth of the adjusting groove gradually increases in the direction toward the outlet joint, which can also realize an exponential change in the flow area, or the width and depth of the adjusting groove can be set to a gradual structure.

[0011] Furthermore, the control component includes a control master station and several control slave stations. The control master station is used to control each control slave station. The control slave station can control the opening of the regulating valve in each regulating valve group according to the distribution of the medium at the paper area corresponding to each regulating valve group. The number of regulating valves in the regulating valve group is not less than four. The control master station is used to control each control slave station and can receive external data, that is, the value monitored by the quality monitoring component. The control master station sends the control data to the control slave station through calculation. The control slave station adjusts the opening of the regulating valve after processing the received data. The overall control is more concise, so that the adjustment of the regulating valve is more accurate and rapid.

[0012] Furthermore, the control slave station outputs a signal to realize the opening control of the corresponding regulating valve group according to the medium distribution signal sent by the quality monitoring part after PID operation. The medium distribution signal obtained by the quality monitoring part will first be transmitted to the control master station. The control master station will calculate and transmit the data that needs to be adjusted to the control slave station corresponding to the regulating valve group in the adjustment area. After the data is calculated by the control slave station, the distance that the valve core in the regulating valve needs to move is known, and the position of the valve core is adjusted accordingly to change the valve opening of the regulating valve. The PID algorithm is simple in principle, easy to implement, and widely applicable. The control parameters are independent of each other, and the selection of parameters is also relatively simple.

[0013] Furthermore, the signal output by the control slave station is a pulse signal. The pulse signal has high control accuracy, can accurately control the moving position and moving speed of the valve core, and realize accurate positioning of the valve core, so that the valve opening can be adjusted more accurately, and the flow rate can be accurately controlled. At the same time, the pulse signal has a faster adjustment speed, which avoids errors and delays in manual operation and improves the efficiency and accuracy of paper production.

[0014] Furthermore, the control assembly also includes a motor connected to the valve core in each regulating valve, and the motor is connected to the control slave station signal. When controlling the valve opening of the regulating valve, the flow area of the medium is changed by the movement of the valve core, so the control slave station calculates the distance that the valve core needs to move, and then converts the calculated value into the distance that the motor drives the valve core to move.

[0015] Furthermore, each control slave station can control one or more regulating valves in the corresponding regulating valve group. Each regulating valve can be controlled individually to test the regulating valve. Since there are multiple regulating valves in the regulating valve group and they can correspond to partial areas of the paper, by controlling all the regulating valves in the regulating valve group, the flow control between the regulating valve group and the corresponding area is achieved, thereby realizing the control of the paper quality, that is, by controlling the valve opening to control the amount of medium sprayed onto the paper, so as to control the dryness and moisture distribution of the paper. Description of the Drawings

[0016] Figure 1 A schematic flow chart for explaining a schematic embodiment of the regulating valve in the present invention;

[0017] Figure 2 A schematic structural diagram for explaining a schematic embodiment of the regulating valve in the present invention;

[0018] Figure 3 A schematic structural diagram for explaining a schematic embodiment of the nozzle in the present invention.

[0019] Reference Signs:

[0020] 1. Regulating valve, 11. Valve body, 12. Water storage cavity, 13. Valve core, 131. Adjusting groove, 14. Outlet joint, 21. Control master station, 22. Control slave station, 23. Quality monitoring member, 24. Regulating valve group, 31. Synchronous motor, 311. Pushing rod, 32. Motor connecting block, 4. Nozzle, 41. Water inlet, 42. Water outlet, 43. Air inlet, 44. Swirling member. Detailed Embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] It should be noted that the azimuth terms such as left, right, up, down, front, and back in the embodiments of the present invention are only relative concepts to each other or are referenced based on the normal use state of the product, that is, the traveling direction of the product, and should not be considered as restrictive.

[0023] In addition, it should also be noted that the dynamic terms such as "relative movement" mentioned in the embodiments of the present invention not only refer to the change in position, but also include movements such as rotation and rolling where the position does not change relatively, but the state changes.

[0024] Finally, it should be noted that when a component is referred to as being "located" or "set on" another component, it can be on the other component or there can be an intermediate component at the same time. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be an intermediate component at the same time.

[0025] like Figures 1 to 3 A multi-way high-precision flow regulating valve is shown, the regulating valve has multiple regulating valves, and the multiple regulating valves 1 are combined to form multiple groups of regulating valve groups 24 corresponding to the paper, and each regulating valve group 24 is connected to the control system signal; the regulating valve 1 includes a valve body 11 and a water storage chamber 12 formed in the valve body 11, and the regulating valve 1 also includes a valve core 13 arranged in the valve body 11, the valve core 13 extends into the water storage chamber 12 and communicates with the water storage chamber 12, and the valve core 13 can move relative to the water storage chamber 12 to change the flow area of the medium; the control system includes a control component and a quality monitoring component 23, the quality monitoring component 23 is used to obtain the dryness, thickness and medium distribution of the paper and transmit them to the control component, the control component is in transmission connection with the valve core 13, wherein the control component can drive the valve core 13 in the regulating valve to move to adjust the corresponding regulating The valve opening of the valve, and the adjustment range of the valve opening is 0 to 100%; in the present application, the regulating valve is used in the papermaking field. As the speed of the papermaking machine continues to increase, the quality requirements for paper are also increased while the output increases. Therefore, it is more important to increase the added value of the product and reduce the energy consumption during paper production. Among them, one of the key factors affecting the added value and energy consumption is the banner quality of the paper product, that is, the paper dryness, moisture distribution and thickness. In the present application, the regulating valve has multiple, and multiple groups of regulating valve groups 24 are formed. Comprehensive coverage of the paper is achieved through the multiple groups of regulating valve groups 24. At the same time, the valve core 13 in the regulating valve changes the flow area of the medium by moving to adjust the amount of medium sprayed to the paper, so that the medium data in the paper area corresponding to the regulating valve group 24 meets the requirements.

[0026] At the same time, when regulating the flow, since the adjustment range of the valve opening is 0-100%, the regulating valve in the present application can achieve precise flow regulation while increasing the adjustable range accordingly, so that the valve opening of the regulating valve can be at the desired value.

[0027] When adjusting the quality of the medium, the reference standard is the quality monitoring component 23, which can obtain the paper dryness, thickness, and the medium distribution of the paper, and exchange the above data with the control component, so that the control component compares according to the measured data and the papermaking process parameters to adjust the regulating valve; as an implementation manner in this application, the quality monitoring component 23 selects a Quality Control System (QCS) for measurement. Generally, the quality control system used in the quality management of the papermaking industry refers to a management system dedicated to meeting quality requirements. That is, in each link of the quality loop of producing products, methods such as quality measurement and data statistics are used to analyze the quality reasons of the products, so as to control the product quality to meet the quality technical requirements.

[0028] In this application, when changing the valve opening of the regulating valve, it is achieved by moving the valve core 13, thereby changing the flow area of the medium and realizing different flow rates output by the regulating valve. Among them, when the regulating valve changes the valve opening state, the valve core 13 has a set moving distance and an actual moving distance, and the difference between the set moving distance and the actual moving distance is less than 0.1% of the set moving distance; when adjusting the regulating valve, when the valve core 13 moves to a specified distance driven by the control component, there will be a change in position within a certain range, which is inevitable in the control process, that is, it is called the dead band of the regulating valve. In this application, when adjusting the valve core 13, the set moving distance is the spraying amount required by the regulating valve, and the actual moving distance is the position where the valve core 13 is located after the position adjustment has a dead band, and the difference between the set moving distance and the actual moving distance is less than 0.1% of the set moving distance, so as to ensure that the position of the adjusted valve core 13 is closely close to the set position, so that the ejected medium meets the papermaking requirements within a certain error range, so that the adjusted paper meets the required medium quality of the paper. When the dead band of the regulating valve is too large, for example, using a pneumatic regulating valve, it will cause the response time of the control component to become longer, and the parameters cannot be accurately controlled when the valve core 13 is adjusted.

[0029] As an implementation manner in this application, the control component includes a control master station 21 and several control slave stations 22. The control master station 21 is used to control each control slave station 22. The control slave station 22 can control the opening of the regulating valves in each regulating valve group 24 according to the medium distribution at the paper area corresponding to each regulating valve group 24. The number of regulating valves in the regulating valve group 24 is not less than four; the control master station 21 is used to control each control slave station 22, and can receive external data, that is, the values monitored by the quality monitoring component 23. And the control master station 21 sends the control data to the control slave station 22 through calculation. The control slave station 22 processes the received data to realize the adjustment of the valve opening of the regulating valve. The overall control is more concise, so that the adjustment of the regulating valve is more accurate and rapid.

[0030] Among them, the control master station 21 can be selected as the Siemens S7-1500 master station, and the control slave station 22 can be selected as the S7-1200 slave station. The control master station 21 and the control slave station 22 are linked through PROFINET, and S7-1500 is selected as the control master station 21, which can support 128 S7-1200 accesses, and each S7-1200 can control no less than four regulating valves, thereby ensuring that the number of regulating valves can cover papermaking machines of all paper widths, and realize the control and adjustment of the quality of paper of different sizes.

[0031] As an implementation mode in the present application, the control slave station 22 outputs a signal after PID calculation based on the medium distribution signal emitted by the quality monitoring component 23 to realize the opening control of the corresponding regulating valve group 24; specifically, since the medium distribution signal obtained by the quality monitoring component 23 will be first transmitted to the control master station 21, the control master station 21 will calculate and transmit the data to be adjusted to the control slave station 22 corresponding to the regulating valve group 24 in the adjustment area. After the data is calculated by the control slave station 22, the distance required for the valve core 13 in the regulating valve to move is known, and the position of the valve core 13 is adjusted accordingly to change the valve opening of the regulating valve. The PID algorithm is simple in principle, easy to implement, and has a wide range of applications. In addition, the control parameters are independent of each other, and the selection of parameters is also relatively simple.

[0032] Preferably, the signal output by the control slave station 22 is a pulse signal; the pulse signal control has high precision, and can accurately control the moving position and moving speed of the valve core 13, thereby achieving precise positioning of the valve core 13, thereby making the adjustment of the valve opening more precise, and achieving precise control of the flow rate. At the same time, the pulse signal adjustment speed is faster, avoiding errors and delays in manual operation, and improving the efficiency and precision of paper production.

[0033] The control component also includes a motor that is transmission-connected to the valve core 13 in each regulating valve, and the motor is signal-connected to the control slave station 22; since the flow area of the medium is changed by moving the valve core 13 when controlling the valve opening of the regulating valve, the control slave station 22 calculates the distance that the valve core 13 needs to move, and then converts the calculated value into the distance that the motor drives the valve core 13 to move.

[0034] In the present application, the motor includes a synchronous motor 31 and a motor connection block 32 that houses the synchronous motor 31. The motor connection block 32 is connected to the valve body 11. The synchronous motor 31 is provided with a push rod 311 that is drivingly connected to the valve core 13 and a transmission rod that drives the push rod 311. The transmission rod is connected to the motor shaft of the synchronous motor 31. When the motor shaft rotates, it can convert the rotation of the motor shaft into a linear movement. Thus, while moving linearly, it drives the push rod 311 to move. And the push rod 311 is connected to the valve core 13. Therefore, the movement of the push rod 311 is the movement of the valve core 13. At the same time, the motor can rotate forward and backward to achieve the movement of the transmission rod in different directions, thereby adjusting the movement direction of the valve core, and further realizing the regulation of the fluid flow rate.

[0035] In the present application, the synchronous motor can be selected as a stepper motor or a servo motor, and the driving method can refer to the prior art and will not be elaborated here.

[0036] Preferably, the push rod 311 is threadedly connected to the valve core 13. The connection between the push rod and the valve core is realized through internal and external threads, which facilitates the push rod 311 to drive the transmission rod to move. Moreover, the connection between the push rod 311 and the valve core 13 is closer, and the movement between the push rod 311 and the valve core 13 is more synchronous. Thus, when driving the flow regulating column to move through the push rod 311, it is more stable, ensuring that the movement amount of the flow regulating column is more subtle, and further ensuring that the flow regulating column is more accurate when adjusting the flow rate.

[0037] Preferably, each control slave station 22 can control one or more regulating valves in the corresponding regulating valve group 24. That is, the control slave station 22 can not only perform single-point control on a single regulating valve in the regulating valve group 24, but also synchronously control all the regulating valves in the regulating valve group 24. For example, each regulating valve can be controlled through single-point control to test the regulating valve. And there are multiple regulating valves in the regulating valve group 24, and they can correspond to partial areas of the paper. Therefore, by controlling all the regulating valves in the regulating valve group 24, the flow control of the regulating valve group 24 and the corresponding area is realized, thereby realizing the control of the paper quality, that is, by controlling the valve opening to control the amount of medium sprayed onto the paper, so as to control the dryness and moisture distribution of the paper.

[0038] In the present application, the minimum movement distance of the valve core 13 is 0.02 mm. Since the movement of the valve core 13 in the present application is driven by the motor, the movement distance of the valve core 13 can be accurately controlled. And the movement distance of the valve core 13 is short. Therefore, when adjusting the flow rate, the movement distance of the valve core 13 under the control of the motor is short, so the adjustment amount of the flow rate will also be small, thereby realizing the accurate control of the flow rate.

[0039] In the present application, the regulating valve further includes an outlet joint 14 communicating with the water storage chamber 12. Along the direction towards or away from the outlet joint 14, the flow area decreases or increases exponentially. After the medium in the water storage chamber 12 is controlled for flow rate by the valve core 13, it is discharged from the outlet joint 14. Moreover, during the movement of the valve core 13, the flow area of the medium can also be changed, that is, the regulation of the valve opening degree in the regulating valve is realized. Among them, when the flow area changes, the change in its area is exponential, which can not only meet the precise regulation of the flow rate within a small range, but also achieve a large-range change in the flow rate when rapid regulation is required.

[0040] Specifically, since the valve core 13 can achieve the change of the flow area by moving, when the valve core 13 moves towards the outlet joint 14, the flow area will decrease, and the flow rate of the regulating valve will correspondingly decrease. When the valve core 13 moves away from the outlet joint 14, the flow area will increase, and the flow rate of the regulating valve will also increase correspondingly.

[0041] As an implementation manner in the present application, the valve core 13 includes an adjustment groove 131 formed to communicate the water storage chamber 12 and the outlet joint 14. The width and / or depth of the adjustment groove 131 changes along the extension direction of the outlet joint 14. That is, when the valve core 13 moves, the adjustment of the valve opening degree is realized by changing the communication area between the adjustment groove 131 and the outlet joint 14. Among them, when the adjustment groove 131 changes, the width of the adjustment groove 131 can be changed. For example, the width of the adjustment groove 131 gradually increases along the direction towards the outlet joint 14, so as to realize the exponential change of the flow area. Or, the adjustment groove can also be of equal width, but the depth of the adjustment groove 131 gradually increases along the direction towards the outlet joint 14, and the exponential change of the flow area can also be realized. Or, the dimensions of both the width and depth of the adjustment groove 131 can be set as a gradually changing structure.

[0042] As a preferred implementation manner in the present application, the cross-section of the adjustment groove 131 along the horizontal direction is triangular, so as to ensure that during the movement of the valve core, the width of the adjustment groove 131 can change correspondingly. At the same time, during the movement of the valve core, it can be ensured that when moving, the change in the width of the connection groove is relatively uniform, so as to facilitate more precise control of the flow rate.

[0043] It can be understood that for the present application, the cross-section of the adjustment groove 131 in the horizontal direction can also be selected as other shapes, as long as it is ensured that when the valve core moves, the width of the adjustment groove 131 can change, so as to achieve the adjustment of the flow rate. For example, the cross-section of the adjustment groove in the horizontal direction can also be selected as a rectangle, trapezoid, circle, ellipse or arc-shaped structure, etc. When the cross-section is a rectangle, during the movement of the adjustment groove 131, the width of the adjustment groove 131 will not increase. Therefore, by setting the adjustment groove 131 obliquely, that is, during the movement of the adjustment groove 131, the depth of the adjustment groove 131 will change, and the adjustment of the flow rate in the present application can also be achieved.

[0044] As a preferred embodiment of the present application, the inclination angle of the adjustment groove 131 is less than 5°; that is, when the width of the adjustment groove 131 changes, it is gentle, so that when the valve core moves, the width of the adjustment groove 131 changes relatively slowly, that is, the accuracy is higher when adjusting the flow rate, and accurate control of the flow rate can be achieved within a small range.

[0045] In the present application, the control valve further includes a nozzle 4 connected to the outlet joint. The nozzle 4 is communicated with the outlet joint through a plastic pipe. The medium is discharged from the outlet joint after flow rate adjustment and flows to the nozzle through the plastic pipe. The nozzle 4 includes a nozzle body connected to the plastic pipe. The nozzle body forms a nozzle cavity. The nozzle cavity includes a water inlet 41 connected to the plastic pipe and a water outlet 42 oppositely arranged with the water inlet 41. The medium in the plastic pipe enters the nozzle cavity from the water inlet 41 and is discharged from the water outlet 42. At the same time, the nozzle further includes an air inlet 43 formed at the nozzle body and a swirl member 44 surrounding the water outlet. The air inlet 43 is communicated with the nozzle cavity and can transport gas into the nozzle cavity. The gas contacts the medium in the nozzle cavity to atomize the medium. The atomized medium passes through the swirl member 44, so that the atomized medium discharged from the water outlet is in a rotating state, thus better cooperating with the paper and improving the production quality of the paper.

[0046] Preferably, the extending direction of the air inlet 43 is perpendicular to the extending direction of the nozzle cavity, so that the gas entering from the air inlet 43 can better impact the medium in the nozzle cavity, so that the medium is quickly converted into an atomized state.

[0047] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A multi-channel high-precision flow regulating valve, characterized in that There are multiple regulating valves, and the multiple regulating valves are combined to form multiple regulating valve groups corresponding to the paper, and each regulating valve group is connected to the control system signal; The regulating valve comprises a valve body and a water storage cavity formed in the valve body, and the regulating valve further comprises a valve core arranged in the valve body, the valve core extends into the water storage cavity and communicates with the water storage cavity, and the valve core can move relative to the water storage cavity to change the flow area of the medium; The control system includes a control component and a quality monitoring component, wherein the quality monitoring component is used to obtain the dryness, thickness and medium distribution of the paper and transmit them to the control component, wherein the control component is connected to the valve core in a transmission manner, wherein the control component can drive the valve core in the regulating valve to move so as to adjust the valve opening corresponding to the regulating valve, and the adjustment range of the valve opening is 0-100%; the regulating valve also includes an outlet joint connected to the water storage chamber, and the flow area decreases or increases exponentially in the direction toward or away from the outlet joint; the valve core includes an adjustment groove formed to connect the water storage chamber and the outlet joint, and the depth of the adjustment groove varies along the extension direction of the outlet joint; the regulating valve also includes a nozzle connected to the outlet joint The nozzle is connected to the outlet joint through a plastic tube, and the medium is discharged from the outlet joint after flow adjustment and flows to the nozzle from the plastic tube, wherein the nozzle includes a nozzle body connected to the plastic tube, the nozzle body forms a nozzle cavity, the nozzle cavity includes a water inlet connected to the plastic tube and a water outlet arranged opposite to the water inlet, the medium in the plastic tube enters the nozzle cavity from the water inlet and is discharged from the water outlet, at the same time, the nozzle also includes an air inlet formed at the nozzle body and a swirl component arranged around the water outlet, the air inlet is connected to the nozzle cavity and can transport gas into the nozzle cavity, the gas contacts the medium in the nozzle cavity to atomize the medium, the atomized medium passes through the swirl component, so that the atomized medium discharged from the water outlet is in a rotating state; the extension direction of the air inlet is perpendicular to the extension direction of the nozzle cavity.

2. The multi-channel high-precision flow regulating valve according to claim 1, wherein When the regulating valve changes the valve opening, the valve core has a set moving distance and an actual moving distance, and the difference between the set moving distance and the actual moving distance is less than 0.1% of the set moving distance.

3. A multi-channel high-precision flow regulating valve according to claim 1, characterized in that, The minimum moving distance of the valve core is 0.02 mm.

4. The multi-channel high-precision flow regulating valve according to claim 1, wherein The control component comprises: Control master, and Several control slave stations, the control master station is used to control each of the control slave stations, the control slave stations can control the opening of the regulating valve in each of the regulating valve groups according to the medium distribution at the paper area corresponding to each of the regulating valve groups, and the number of the regulating valves in the regulating valve group is not less than four.

5. The multi-channel high-precision flow regulating valve according to claim 4, characterized in that The control slave station outputs a signal after PID calculation based on the medium distribution signal sent by the quality monitoring component to achieve the opening control of the corresponding regulating valve group.

6. The multi-channel high-precision flow regulating valve according to claim 5, wherein The signal output by the control slave station is a pulse signal.

7. A multi-channel high-precision flow regulating valve according to claim 4, characterized in that, The control assembly also includes a motor drivingly connected to the valve core in each of the regulating valves, and the motor is signal-connected to the control slave station.

8. A multi-channel high-precision flow regulating valve according to claim 4, characterized in that, Each of the slave control stations can control one or more of the regulating valves corresponding to the regulating valve group.

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