A valve regulating method and device

Abstract

The application provides a valve regulating method and device, wherein the valve regulating method comprises the following steps: collecting a pressure difference signal between adjacent material units; in the case that the pressure difference signal reaches a first threshold value, performing gradient opening on a feed valve of a first material unit, wherein the first material unit is a material unit with a smaller pressure among the adjacent material units, and the gradient opening is corrected in real time according to the deviation between the real-time opening degree of the feed valve and a first opening threshold value; in the case that the pressure difference signal is less than a second threshold value for a preset time, performing gradient closing on the feed valve, wherein the second threshold value is less than or equal to the first threshold value, and by enabling the valve to perform gradient opening or closing, the instantaneous full opening or full closing of the valve is avoided, the switching is prevented from being too fast, and the system pressure is prevented from fluctuating sharply.

Description

Technical Field

[0001] This application relates to the field of industrial control, and in particular to a valve regulating method. This application also relates to a valve regulating device, a computing device, a computer-readable storage medium, and a computer program product. Background Technology

[0002] Valves are commonly used fluid control devices in industrial control systems, widely applied to control material flow in pipeline systems. The precision and response speed of valve regulation directly affect the operational stability and regulation effectiveness of the entire control system.

[0003] However, in existing technologies, valve opening adjustment mostly relies on manual operation or simple on / off control. This simple on / off control method controls the valve to be fully open or fully closed, lacking a gradual adjustment of the valve opening. This can easily lead to system response shocks, affecting operational stability. Furthermore, it cannot dynamically adjust the valve opening based on real-time feedback signals, failing to adapt to changes in system response under different operating conditions. Therefore, there is an urgent need to provide a solution to address these technical problems. Summary of the Invention

[0004] In view of this, embodiments of this application provide a valve regulating method to address the technical deficiencies in the prior art. Embodiments of this application also provide a valve regulating device, a computing device, a computer-readable storage medium, and a computer program product.

[0005] According to a first aspect of the embodiments of this application, a valve adjustment method is provided, comprising: Collect differential pressure signals between adjacent material units; When the differential pressure signal reaches a first threshold, the feed valve of the first material unit is opened in a gradient manner, wherein the first material unit is the material unit with lower pressure among the adjacent material units, and the gradient opening action is corrected in real time according to the deviation between the real-time opening degree of the feed valve and the first opening threshold. If the differential pressure signal remains below a second threshold for a preset time, the feed valve is gradually closed, wherein the second threshold is less than or equal to the first threshold.

[0006] Optionally, the gradient opening of the feed valve of the first material unit includes: The opening degree of the feed valve of the first material unit is gradually increased according to a preset time interval and a single action amplitude, wherein the preset time interval is the time interval between two adjacent gradient opening actions.

[0007] Optionally, the method further includes: The preset time interval and the amplitude of a single action are set on the control system's operation screen; If the deviation exceeds a preset deviation threshold, the preset time interval and the amplitude of a single action are adjusted on the operation screen of the control system.

[0008] Optionally, the gradient opening action is corrected in real time based on the deviation between the real-time opening degree of the feed valve and the first opening threshold, including: During the gradient opening process, the real-time opening degree of the feed valve is obtained by the valve positioner set on the feed valve; Calculate the deviation between the real-time opening degree and the first opening degree threshold; If the deviation exceeds a preset deviation threshold, adjust the amplitude of the single action or adjust the preset time interval.

[0009] Optionally, the step of gradually closing the feed valve includes: The opening of the feed valve is gradually reduced according to a preset time interval and the amplitude of a single action, and the differential pressure signal is monitored after each gradient reduction. If the differential pressure signal is greater than or equal to the second threshold, the gradient shut-off operation is stopped. or, If the differential pressure signal remains below the second threshold and the feed valve reaches the second opening threshold, the gradient closing action is stopped.

[0010] Optionally, the method further includes: After each round of gradient control is completed, the differential pressure response curve during this round of gradient control is recorded. The gradient control includes gradient on and gradient off. The differential pressure response curve is compared and analyzed with a preset reference differential pressure response curve; Based on the comparative analysis results, determine the gradient opening and gradient closing actions for the next round of gradient control.

[0011] According to a second aspect of the embodiments of this application, a valve regulating device is provided, comprising: The acquisition module is configured to acquire differential pressure signals between adjacent material units; The module is configured to gradually open the feed valve of the first material unit when the differential pressure signal reaches a first threshold, wherein the first material unit is the material unit with lower pressure among the adjacent material units, and the gradual opening action is corrected in real time according to the deviation between the real-time opening degree of the feed valve and the first opening threshold. The shut-off module is configured to gradually close the feed valve when the differential pressure signal remains below a second threshold for a preset time, wherein the second threshold is less than or equal to the first threshold.

[0012] According to a third aspect of the embodiments of this application, a computing device is provided, including: a memory and a processor; The memory is used to store computer programs / instructions, and the processor is used to execute the computer programs / instructions. When the computer programs / instructions are executed by the processor, they implement any one of the valve adjustment methods.

[0013] According to a fourth aspect of the embodiments of this application, a computer-readable storage medium is provided that stores a computer program / instructions, which, when executed by a processor, implement any one of the valve adjustment methods described above.

[0014] According to a fifth aspect of the embodiments of this application, a computer program product is provided, including a computer program / instructions, which, when executed by a processor, implement any one of the valve adjustment methods described above.

[0015] The valve regulation method provided in this application automatically triggers valve regulation by collecting differential pressure signals from adjacent areas and triggering the valve's gradient opening or closing action accordingly. This allows the valve to open or close in a gradient manner, avoiding excessively rapid opening or closing that could cause drastic fluctuations in system pressure, potentially leading to safety risks and affecting operational stability. Furthermore, by collecting the valve opening degree in real time and dynamically correcting the gradient opening action amplitude based on the deviation, the valve action can be adjusted according to the actual response state, improving control accuracy and stability. Attached Figure Description

[0016] Figure 1 This is a flowchart of a valve adjustment method provided in an embodiment of this application; Figure 2 This is a schematic diagram of the connection structure of a valve adjustment method provided in an embodiment of this application; Figure 3 This is a schematic diagram of the operation screen of the control system in a valve adjustment method provided in an embodiment of this application; Figure 4 This is a flowchart illustrating the application of a valve adjustment method in the valve gradient control process during the filling of a carbon dioxide storage tank, according to an embodiment of this application. Figure 5 This is a schematic diagram of the structure of a valve regulating system provided in one embodiment of this application; Figure 6 This is a schematic diagram of the structure of a valve regulating device provided in one embodiment of this application; Figure 7 This is a structural block diagram of a computing device provided in one embodiment of this application. Detailed Implementation

[0017] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0018] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0019] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first.

[0020] This application provides a valve regulating method. This application also relates to a valve regulating device, a computing device, a computer-readable storage medium, and a computer program product, which will be described in detail in the following embodiments.

[0021] Figure 1 A flowchart of a valve adjustment method according to an embodiment of this application is shown, which specifically includes the following steps: Step 102: Collect the pressure difference signal between adjacent material units.

[0022] Specifically, the adjacent material unit refers to two material storage units connected by a pipeline. For example, storage tank A and storage tank B are connected by a conveying pipeline, and storage tank A and storage tank B are adjacent material units.

[0023] In this embodiment, the differential pressure signal is obtained by real-time reading of the pressure values ​​of the high-pressure side material unit and the low-pressure side material unit, and calculating the difference between the two. This signal is used to sense the current pressure balance state of the system. Pressure sensors are placed in adjacent material units to collect their pressure values. The collected pressure values ​​are compared and calculated to obtain the differential pressure signal. For example, the pressure values ​​of storage tank A and storage tank B are collected and compared to determine the differential pressure signal between them.

[0024] In this embodiment of the application, by continuously collecting the differential pressure signal, the system operating condition can be monitored in real time, providing accurate input data for subsequent threshold comparison, thereby ensuring the timeliness and accuracy of control decisions.

[0025] Step 104: When the differential pressure signal reaches the first threshold, the feed valve of the first material unit is opened in a gradient manner, wherein the first material unit is the material unit with lower pressure among the adjacent material units, and the gradient opening action is corrected in real time according to the deviation between the real-time opening degree of the feed valve and the first opening threshold.

[0026] Specifically, the first threshold refers to a pre-set pressure critical value used to trigger the valve opening operation. It can be set according to the safety margin and response speed requirements of the specific process, for example, 0.5 MPa. The first material unit can refer to the unit with the lower pressure detected in real time among two adjacent material units. It is determined by comparing the pressure sensor readings between adjacent material units and identifying the one with the smaller reading as the first material unit.

[0027] like Figure 2 As shown: The feed valve can be a regulating valve installed on the first material unit and connected to the material pipeline. It conveys material to the first material unit through the material pipeline. The function of the regulating valve is to control the material flow rate of the material pipeline conveying material to the first material unit. The first material unit is connected to the adjacent material units through pipelines and valves are provided between the material units.

[0028] The gradient opening can be understood as the valve opening not jumping to the target value instantaneously, but gradually increasing in stages according to a certain step size and time interval. In the specific implementation process, in the programmable control mode, the control system sends a gradient opening or gradient closing command to the valve positioner. The positioner obtains the current opening of the valve and sends a drive signal to the actuator according to the preset time interval and the single action amplitude, so that the valve opening is gradually opened or closed according to the preset time interval and the single action amplitude.

[0029] The real-time opening degree is the current percentage of valve opening obtained in real time by a valve positioner installed on the feed valve, for example, a real-time opening degree of 10%. The first opening threshold is the target opening degree after each step of the opening action during the gradient opening process. The deviation is the absolute value of the difference between the real-time opening degree and the first opening threshold.

[0030] In this embodiment of the application, when the pressure difference signal between storage tank A and storage tank B is greater than or equal to the first threshold, it is necessary to determine the side with lower pressure among the adjacent material units (i.e., the first material unit), and control the feed valve of the first material unit to open in a gradient. The feed valve is connected to a feed pipe, and the feed pipe delivers material (such as carbon dioxide) to the first material unit to increase the pressure of the first material unit.

[0031] Specifically, after the first material unit is determined, the control system automatically switches the control mode of the feed valve of the first material unit from operator mode to program control mode. In program control mode, the system automatically accumulates the valve opening according to the preset single action amplitude (e.g., increasing by 2% each time) and preset time interval (e.g., executed once every 3 seconds). Operator mode refers to the mode in which valve control is manually operated by the operator, who needs to manually operate through the control system. Program control mode refers to the mode in which valve control is automatically executed by the control system according to the preset program logic. In this mode, the controller of the control system automatically calculates the valve opening setpoint and executes the adjustment action according to the preset control parameters, without manual intervention.

[0032] During the automatic accumulation of valve opening, a valve positioner installed on the feed valve collects the actual valve opening in real time. Based on the actual valve opening, the deviation from a first opening threshold is calculated. If the deviation is greater than a preset deviation threshold, it indicates that the current adjustment rate may be too fast or too slow, and the system will dynamically adjust the single action amplitude or the preset time interval. For example, if the detected actual valve opening is small compared to the first opening threshold, the system can automatically increase the single action amplitude or shorten the preset time interval to accelerate the actual valve opening towards the target value.

[0033] For example, when the differential pressure signal rises and exceeds the first threshold, the control system identifies that the first material unit is in a low-pressure state and needs to be replenished to balance the pressure, and then initiates a gradient opening procedure. During this process, the system does not blindly open the valve at a fixed rate, but calculates in real time the deviation between the current valve opening and the first opening threshold. If the deviation is large, it indicates that the actual opening is far from the target opening, and the amplitude of each action can be increased or decreased to approach the target opening.

[0034] In this embodiment, the feed valve of the first material unit is gradually opened using a gradient control method, which makes the material flow rate change more gradual. This avoids the drastic changes in material flow rate caused by directly opening or closing the valve completely, which could lead to excessive pressure within the target material unit and create safety hazards. Furthermore, this real-time correction mechanism based on deviation ensures that the valve can smoothly and accurately reach the target opening under different initial opening degrees and different pressure differentials.

[0035] In the specific embodiments provided in this application, the gradual opening of the feed valve of the first material unit includes: The opening degree of the feed valve of the first material unit is gradually increased according to a preset time interval and a single action amplitude, wherein the preset time interval is the time interval between two adjacent gradient opening actions.

[0036] Specifically, the preset time interval is set according to the pressure stability requirements of the actual scenario. For example, the preset time interval can be configured to 3 seconds, which is the time cycle of each cycle of the sequential control program. The single action amplitude can refer to the fixed percentage value of the valve opening increase / decrease within each preset time interval, used to define the step size of each adjustment. For example, the operator can set the single action amplitude to increase / decrease the opening by 2% each time. The preset time interval and the single action amplitude are used together to discretize the continuous valve opening change into multiple small step-like increments.

[0037] In this embodiment of the application, through this discretized control strategy, the valve opening does not jump to the target value instantaneously, but gradually increases in a step-like manner with time intervals and action amplitude as the basic units.

[0038] For example, if the initial opening is 2%, the target opening is 78%, the single action amplitude is set to 2%, and the preset time interval is set to 3 seconds, meaning that the valve opening increases by 2% every 3 seconds, the valve will complete the opening process in 38 control cycles. This step aims to decompose the continuous valve adjustment process into multiple small, controllable sub-steps, utilizing the time delay effect to effectively smooth out fluid pressure fluctuations caused by rapid valve action, thereby achieving precise control of the feed flow rate.

[0039] In this embodiment, a flexible valve opening rate adjustment mechanism is constructed through the coordinated operation of a preset time interval and a single action amplitude. The preset time interval determines the frequency of the adjustment action, while the single action amplitude determines the intensity of each adjustment; together, they define the average valve opening rate. For example, in a chemical reaction feeding system that is extremely sensitive to pressure, the opening speed can be further slowed down by increasing the preset time interval or decreasing the single action amplitude to ensure system pressure stability. For normal operating conditions, the interval can be appropriately shortened or the amplitude increased to improve response efficiency. This parameterized gradient control method not only solves the problem of rigid adjustment caused by the fixed switching speed of traditional actuators but also significantly improves the flexibility and adaptability of valve adjustment.

[0040] In one specific embodiment provided in this specification, the method further includes: The preset time interval and the amplitude of a single action are set on the control system's operation screen; If the deviation exceeds a preset deviation threshold, the preset time interval and the amplitude of a single action are adjusted on the operation screen of the control system.

[0041] Specifically, a control system can refer to a distributed control system used to monitor and manage industrial production processes. The user interface is the human-machine interface provided by the control system to the operator, such as... Figure 3 As shown: This is used to display process parameters and receive control commands. The preset time interval and single action amplitude are configured on the operation screen. After the preset time interval and single action amplitude are configured, they serve as the execution benchmark for subsequent gradient control actions.

[0042] In this embodiment, the operator can directly input the desired preset time interval and single action amplitude value in a specific input box on the operation screen of the control system without modifying the underlying control program code. For example, during the valve gradient opening phase, if the process requires a slow pressure increase, the operator can set the single action amplitude to 0.5% / time on the screen; if a rapid response is required, it can be adjusted to 2.0% / time. After reading the setting value, the system uses it as the execution parameter for subsequent gradient control logic.

[0043] Deviation can refer to the absolute value of the difference between the real-time opening of the feed valve and the first opening threshold (i.e., the target opening). The preset deviation threshold is a pre-defined allowable error range set by the system. It is a critical value used to determine whether the currently configured preset time interval and single action amplitude are appropriate, and can be set according to the allowable error range of the process. When the real-time monitored deviation exceeds this preset deviation threshold, it indicates that the current adjustment speed does not match the actual demand, which may lead to excessively slow adjustment affecting production efficiency or excessively fast adjustment causing pressure fluctuations.

[0044] At this point, the control system will issue a prompt on the operation screen and grant adjustment permissions, allowing operators to dynamically modify the preset time interval and single action amplitude according to the current actual operating conditions. For example, if it is found that the differential pressure rises slowly during valve opening, causing the deviation to exceed the preset deviation threshold, the operator can immediately increase the single action amplitude on the screen, from 1% / action to 3% / action, to accelerate the approach to the target opening degree; conversely, if a sharp pressure fluctuation is detected, the single action amplitude can be reduced or the preset time interval can be extended.

[0045] In this embodiment of the application, by directly setting the preset time interval and single action amplitude on the operation screen of the control system, the limitation of fixed parameters in the traditional control method is broken. This allows process personnel to define the valve action rhythm in real time according to the actual material characteristics and pressure sensitivity on site. When the deviation between the real-time opening degree and the target threshold exceeds the preset deviation threshold, the dynamic adjustment of the above parameters on the operation screen is triggered, forming an adaptive loop of monitoring-judgment-adjustment.

[0046] In one specific embodiment provided in this specification, the gradient opening action is corrected in real time based on the deviation between the real-time opening degree of the feed valve and the first opening threshold, including: During the gradient opening process, the real-time opening degree of the feed valve is obtained by the valve positioner set on the feed valve; Calculate the deviation between the real-time opening degree and the first opening degree threshold; If the deviation exceeds a preset deviation threshold, adjust the amplitude of the single action or adjust the preset time interval.

[0047] Specifically, real-time opening refers to the actual degree of opening of the feed valve at the current moment, usually expressed as a percentage. This real-time opening is obtained through a valve positioner installed on the feed valve actuator, which collects and reports the data in real time. The valve positioner accurately monitors the actual displacement of the valve stem or valve core and converts the mechanical displacement into an electrical signal, which is then transmitted to the control system. Specifically, in program control mode, the control system periodically reads the position signal returned by the valve positioner through a communication interface and interprets it as the current real-time opening value. For example, when the goal is to open the valve from 2% to 78%, the valve positioner reports the current actual opening, such as 15.4% or 23.8%, to the system every approximately 3 seconds during a sequential control cycle.

[0048] The first opening threshold is the target opening degree for each gradient opening action. The deviation is calculated by the control system's calculation module by subtracting the first opening threshold from the real-time opening value obtained above, thereby quantifying the distance between the current valve position and the target position. The deviation reflects the current adjustment progress and also reflects dynamic error information during the adjustment process. When the valve is affected by fluid impact or mechanical resistance, causing the actual opening degree to lag behind the theoretical cumulative opening degree, the deviation will increase significantly. Conversely, if the valve responds too quickly, the rate of change of the deviation will also show a specific trend. Therefore, the deviation is used as a basis for judging whether the control strategy needs to be adjusted.

[0049] Specifically, if the current real-time opening is 60% and the first opening threshold is 62%, that is, the target opening after the current gradient opening action is 62%, then the calculated deviation is 2%.

[0050] Furthermore, the preset deviation threshold is a pre-set critical value used to trigger parameter correction, which can be set according to the allowable error range of the process, for example, set to 1%.

[0051] Specifically, when the deviation exceeds the preset deviation threshold, it indicates that the valve cannot approach the target value within the expected time or there is a large tracking error when adjusted according to the current single action amplitude or preset time interval. In this case, the system can increase the single action amplitude to speed up the valve's approach to the first opening threshold, or, in scenarios requiring more precise control, shorten the preset time interval and increase the adjustment frequency.

[0052] Using the previous example, the calculated deviation is 2%, while the preset deviation threshold is set to 1%. This indicates that the valve opening speed is too slow or there is a significant lag. The system will automatically adjust the single action amplitude from the default 1% / action to 2% / action, thereby increasing the valve opening more in the next sequential control cycle and narrowing the gap with the target opening. If the deviation exhibits an oscillating divergent trend under certain special operating conditions, the system can also slow down the adjustment pace by extending the preset time interval.

[0053] In this embodiment, the error caused by the nonlinearity of the actuator is eliminated by the real position feedback provided by the valve positioner, so that the calculated deviation can accurately reflect the adjustment state. On this basis, by comparing the deviation with the preset deviation threshold, the system can intelligently identify abnormal lag or over-fast response in the adjustment process, thereby triggering the correction of the single action amplitude or preset time interval. This dynamic correction strategy effectively solves the response lag or overshoot problem in traditional fixed rate gradient control, ensuring that the feed valve can smoothly and accurately reach the first opening threshold.

[0054] Step 106: If the differential pressure signal remains less than the second threshold for a preset time, the feed valve is gradually closed, wherein the second threshold is less than or equal to the first threshold.

[0055] Specifically, the second threshold is a pre-set critical value used to determine whether the system pressure has returned to normal. Its value is set to be less than or equal to the first threshold. Typically, if the differential pressure signal is continuously less than the second threshold within a preset time, it indicates that the pressure of the first material unit has tended to be balanced with the pressure of the adjacent material unit or the pressure of the adjacent material unit is insufficient to form a large differential pressure with the first material unit. At this time, the feed valve needs to be closed in a gradient.

[0056] The preset time is a continuous time window used to filter out brief signal fluctuations, ensuring that the closing action is triggered only when the differential pressure signal is truly stable below the second threshold. This time can be set according to the system inertia, such as 5 seconds or 10 seconds. Gradient closing can refer to the process of gradually reducing the valve opening from the current high position to the low position according to a preset rhythm.

[0057] In this embodiment, when the differential pressure signal drops below the second threshold and this state remains unchanged for a preset time (i.e., continuously below the second threshold), the control system determines that the system pressure has reached equilibrium or the pressure of adjacent material units is insufficient, requiring a reduction in feed, thereby triggering the initiation of a gradient shutdown procedure. This shutdown process also employs a step-by-step reduction method to avoid pressure rebound caused by the valve instantly cutting off the material flow. For example, the first threshold is set to 0.5 MPa, the second threshold to 0.4 MPa, and the preset time to 5 seconds. If the differential pressure signal drops from 0.6 MPa to 0.3 MPa and remains in this state for more than 5 seconds, the system controls the feed valve to gradually reduce its opening by 1% each time until a safe low position is reached.

[0058] If the differential pressure signal only momentarily touches 0.3 MPa and then rises back, the valve remains unchanged and does not operate because the time condition of being continuously less than 0.3 MPa is not met.

[0059] In this embodiment, by introducing dual-threshold hysteresis logic and time filtering mechanism, the robustness of the system is significantly improved, malfunctions caused by signal noise are eliminated, and the stability and reliability of valve regulation are ensured.

[0060] In one specific embodiment provided in this specification, the gradual closure of the feed valve includes: The opening of the feed valve is gradually reduced according to a preset time interval and the amplitude of a single action, and the differential pressure signal is monitored after each gradient reduction. If the differential pressure signal is greater than or equal to the second threshold, the gradient shut-off operation is stopped. or, If the differential pressure signal remains below the second threshold and the feed valve reaches the second opening threshold, the gradient closing action is stopped.

[0061] Specifically, stopping the gradient closure action includes immediately interrupting the current sequential control program and automatically switching the control mode from program control mode back to operator mode, thereby locking the current valve opening. The second opening threshold can refer to the minimum allowable valve opening set to ensure basic process flow or prevent equipment damage, for example, 2%. Being continuously less than the second threshold can mean that the differential pressure signal is always maintained below the second threshold within a preset time window.

[0062] In this embodiment, during the gradient closure process, when the monitored differential pressure signal rises and reaches or exceeds the second threshold, it indicates that the pressure imbalance in the system has been alleviated or eliminated. Continuing to close the valve may lead to new pressure fluctuations or affect process stability. For example, if the second threshold is set to 0.5 MPa, when the real-time monitored differential pressure signal rises from below 0.5 MPa to 0.5 MPa or above, a stop command is immediately triggered to stop the gradient closure action.

[0063] When the differential pressure signal remains below the second threshold for an extended period and has reached the valve's minimum opening (i.e., the second opening threshold), the system will forcibly stop the gradient shut-off action even if the differential pressure does not recover, once the opening of the feed valve decreases to the second opening threshold. For example, if the second opening threshold is 2%, when the valve opening gradually decreases from 78% to the preset second opening threshold of 2%, the shut-off action will be terminated regardless of whether the differential pressure signal is greater than or less than or equal to 0.5 MPa. This, together with the above, constitutes a dual stop condition. The above focuses on timely loss mitigation during pressure recovery, while this step focuses on bottom-line protection under extreme operating conditions.

[0064] In this embodiment, a closed-loop feedback control mechanism is constructed by gradient reduction according to preset time intervals and single action amplitude, combined with real-time differential pressure signal monitoring. Based on this, the comparison result between the differential pressure signal and a second threshold is used as the dynamic stopping criterion, which can keenly capture the recovery trend of system pressure and terminate the valve closing action in a timely manner. Simultaneously, a second opening threshold is introduced as a static safety baseline to ensure that the valve maintains the necessary flow capacity even when the differential pressure remains abnormal. This logic combining dynamic judgment and static limit not only solves the pressure shock problem caused by traditional fixed-speed valve closing but also effectively avoids the risk of over-adjustment or erroneous closure due to a single control logic.

[0065] In one specific embodiment provided in this specification, the method further includes: recording the differential pressure response curve during the gradient control process after each round of gradient control is completed, wherein the gradient control includes gradient on and gradient off; The differential pressure response curve is compared and analyzed with a preset reference differential pressure response curve; Based on the comparative analysis results, determine the gradient opening and gradient closing actions for the next round of gradient control.

[0066] Specifically, the differential pressure response curve refers to a data set reflecting the trend of differential pressure signals between adjacent material units over time, recording the dynamic characteristics of differential pressure throughout the entire process from the start of gradient control to the end of control. This curve is obtained by continuously capturing the measured values ​​of pressure sensors at a preset sampling frequency (e.g., once per second or once per sequential control cycle). The purpose of the differential pressure response curve is to quantitatively evaluate the actual effect of this round of gradient control. The differential pressure response curve can include key information such as the system's response speed, overshoot, number of oscillations, and settling time.

[0067] Specifically, after completing a gradient opening from the initial opening to the target opening, or a gradient closing from the high opening to the low opening, the system automatically connects the discrete differential pressure points collected during that time period into a continuous response curve and stores it. For example, if the gradient opening process takes 30 seconds, the system will record the differential pressure values ​​every 3 seconds (preset time interval) within those 30 seconds, forming a local response curve containing 10 data points.

[0068] Furthermore, the preset reference differential pressure response curve is an idealized differential pressure change curve pre-stored in the control system, representing the differential pressure change trajectory that the system should exhibit under optimal control parameters. This reference curve is typically set based on process safety requirements, equipment characteristics, and historical best operating data, defining the maximum allowable pressure fluctuation range, the ideal rising or falling slope, and the stable region without oscillations.

[0069] Comparative analysis can refer to overlaying and comparing the recorded actual differential pressure response curve with the preset benchmark differential pressure response curve on the same time axis, and calculating the deviation index between the two. The deviation index includes, but is not limited to, the maximum instantaneous deviation value, the slope difference, and the oscillation amplitude difference.

[0070] Specifically, the control system uses algorithms to calculate the deviation of the differential pressure response curve from the preset reference differential pressure response curve. If the upward slope of the differential pressure response curve is significantly greater than that of the preset reference differential pressure response curve, it indicates that the valve action is too rapid, resulting in excessive pressure shock. If the differential pressure response curve shows multiple peaks and troughs while the preset reference differential pressure response curve is smooth, it indicates that the current control parameters are causing system oscillations. For example, if the preset reference differential pressure response curve is set to rise linearly and gently, but the actual recorded differential pressure response curve shows a steep jump in the initial stage followed by a decline, comparative analysis can identify that the initial action amplitude is too large. Thus, this comparative analysis process transforms qualitative pressure fluctuations into quantitative deviation data, providing a clear basis for precise adjustment of control parameters.

[0071] Furthermore, the gradient opening and closing actions of the next round of gradient control are based on the deviation index obtained from comparative analysis. The control parameters corresponding to the gradient opening and closing actions are recalculated and generated through a preset optimization strategy. When the comparative analysis results show that the actual differential pressure changes too quickly, the system will increase the preset time interval for the next round of gradient opening and closing actions, or decrease the preset single-action amplitude, to slow down the valve's action rate. Conversely, if the actual differential pressure changes too slowly, the time interval will be appropriately reduced or the single-action amplitude will be increased. Specifically, if the analysis reveals high-frequency oscillations in the actual response curve, it indicates that the current combination of time interval and action amplitude does not match the system's inertia. Therefore, the time interval will be increased to wait for the system to stabilize before executing the next action.

[0072] For example, if the comparative analysis in this round shows that the maximum instantaneous deviation exceeds the benchmark value by 20%, the system can automatically reduce the single action amplitude in the next round from 2% / action to 1.5% / action according to preset rules, and extend the time interval from 3 seconds to 4 seconds. In this way, the system can dynamically adjust the execution strategy of the next round based on the actual performance of the previous round, so that the gradient control parameters of the valve can adaptively match the current actual application requirements.

[0073] In this embodiment, the dynamic details of the gradient opening and closing process are fully captured by recording the differential pressure response curve, providing complete data support for evaluation. By comparing and analyzing the actual curve with the preset benchmark curve, the gap between the current control strategy and the ideal state can be accurately located, and specific problems such as excessively fast response, oscillation, or lag can be identified. Furthermore, by dynamically adjusting the preset time interval and single action amplitude of the next round based on the comparison results, the self-evolution and real-time correction of the control parameters are realized, so that the valve adjustment method no longer relies on fixed static parameters, but has the ability to automatically learn with changes in operating conditions.

[0074] The valve regulation method provided in this application automatically triggers valve regulation by collecting differential pressure signals from adjacent areas and triggering the valve's gradient opening or closing action accordingly. This allows the valve to open or close in a gradient manner, avoiding excessively rapid opening or closing that could cause drastic fluctuations in system pressure, potentially leading to safety risks and affecting operational stability. Furthermore, by collecting the valve opening degree in real time and dynamically correcting the gradient opening action amplitude based on the deviation, the valve action can be adjusted according to the actual response state, improving control accuracy and stability.

[0075] The following description, in conjunction with the accompanying drawings, uses the application of the valve adjustment method provided in this application in valve gradient control during the filling process of a carbon dioxide storage tank as an example to further illustrate the valve adjustment method. (The accompanying drawings are attached.) Figure 4 This paper illustrates a valve adjustment method according to an embodiment of the present application, applied to valve gradient control during the filling process of a carbon dioxide storage tank. The method specifically includes the following steps: Step 401: Open the gas delivery pipeline valve, collect the pressure difference signal between adjacent tanks, and determine the starting conditions for gradient control.

[0076] Normally, after a tank expels its internal gas, its internal pressure is relatively low. When other tanks containing other gaseous substances are connected through pipelines, the gas will flow into the side with lower internal pressure due to the pressure difference. Even if the pipeline between the two tanks used for storing gas is equipped with valves, the long-term pressure difference will cause the valve seals to bear additional loads and accelerate aging. Therefore, when the pressure difference between two adjacent tanks is too large, it is necessary to supply gas to the side with lower internal pressure to compensate for the pressure difference.

[0077] Specifically, chemical plants typically have a carbon dioxide storage tank supply system to provide carbon dioxide gas to production units. When a production unit discharges its internal material, the internal pressure drops. The system then assesses the pressure of an adjacent tank (connected via pipeline in the supply system) to store the gas. The valves on the pipelines supplying the carbon dioxide to these adjacent tanks are used to control the pressure difference. When the pressure difference between a production unit and its adjacent tank reaches a preset first threshold, it indicates sufficient conditions for gradient control. The control system then triggers a gradient opening of the feed valve, supplying carbon dioxide to the production unit to compensate for the pressure difference.

[0078] Step 403: When the differential pressure signal reaches the first threshold, the feed valve of the filling tank is opened in a gradient manner, and the valve opening is gradually increased according to the preset time interval and the single action amplitude.

[0079] Specifically, the control system gradually increases the opening of the feed valve according to preset time intervals (e.g., 2 seconds) and single action amplitudes (e.g., 5%). For example, assuming the initial valve opening is 0%, the target opening is 50%, the single action amplitude is 5%, and the preset time interval is 2 seconds, the valve control process is: 0% → wait 2 seconds → 5% → wait 2 seconds → 10%... until the opening reaches the target value and stops.

[0080] Step 405: Obtain the valve opening degree in real time through the valve positioner, and dynamically adjust the control parameters for gradient opening based on the deviation between the real-time opening degree and the target opening degree.

[0081] Specifically, during the gradient opening process, the control system obtains the current valve opening value in real time through the valve positioner installed on the feed valve. When the deviation is greater than the preset deviation threshold, it indicates that the rate of change of the valve opening does not match the expectation, and the system automatically adjusts the single action amplitude (such as increasing it from 5% to 8%) or extends / shortens the preset time interval.

[0082] Step 407: If the differential pressure signal remains below the second threshold for a preset time, the feed valve is gradually closed, and the change in differential pressure signal is monitored after each gradient decrease.

[0083] Specifically, when the differential pressure signal remains below the second threshold for a preset time, the control system determines that the pressure between the tanks has reached equilibrium or the filling target has been achieved, and begins the gradient closure process. Gradient closure also employs a step-by-step adjustment method, gradually reducing the opening of the feed valve according to preset time intervals and single-action amplitudes. After each reduction, the system monitors the change in the differential pressure signal. When the differential pressure signal is greater than or equal to the second threshold, it indicates that the pressure between the tanks has stabilized, and the system stops the gradient closure action; when the differential pressure signal remains below the second threshold and the feed valve has reached the second opening threshold (e.g., 5%), the gradient closure action is completed.

[0084] In summary, this embodiment of the application achieves automatic valve regulation without manual intervention by collecting the differential pressure signal between adjacent tanks and triggering the gradient opening action of the valve accordingly; the gradient control method achieves smooth valve opening and closing, effectively avoiding the system impact caused by the traditional control method of fully opening or fully closing the valve; and the valve positioner obtains the valve opening degree in real time and dynamically corrects the control parameters according to the deviation, thereby improving control accuracy and stability.

[0085] Corresponding to the above method embodiments, this application also provides a valve regulating system. Figure 5 A schematic diagram of a valve regulating system provided in this application is shown. The system includes a controller, a pressure sensor, a valve positioner, a feed valve, and a material unit.

[0086] The controller is used to store gradient control executable instructions, the pressure sensor is used to collect the pressure signal of the material unit, the valve positioner is used to obtain the real-time opening degree of the valve and feed it back to the controller, the material unit includes a first tank and a second tank, the feed valve is used to control the feeding speed to the material unit, and when the gradient control executable instructions are executed by the controller, the steps of the above valve adjustment method are implemented.

[0087] Corresponding to the above method embodiments, this application also provides a valve regulating device embodiment. Figure 6 A schematic diagram of a valve regulating device according to an embodiment of this application is shown. Figure 6 As shown, the device includes: The acquisition module 601 is configured to acquire the differential pressure signal between adjacent material units; The module 603 is configured to gradually open the feed valve of the first material unit when the differential pressure signal reaches a first threshold, wherein the first material unit is the material unit with lower pressure among the adjacent material units, and the gradual opening action is corrected in real time according to the deviation between the real-time opening degree of the feed valve and the first opening threshold. The shut-off module 605 is configured to gradually close the feed valve when the differential pressure signal is continuously less than a second threshold within a preset time, wherein the second threshold is less than or equal to the first threshold.

[0088] Optionally, the opening module 603 is further configured to: The opening degree of the feed valve of the first material unit is gradually increased according to a preset time interval and a single action amplitude, wherein the preset time interval is the time interval between two adjacent gradient opening actions.

[0089] Optionally, the device further includes: a configuration module configured to: The preset time interval and the amplitude of a single action are set on the control system's operation screen; If the deviation exceeds a preset deviation threshold, the preset time interval and the amplitude of a single action are adjusted on the operation screen of the control system.

[0090] Optionally, the opening module 603 is further configured to: During the gradient opening process, the real-time opening degree of the feed valve is obtained by the valve positioner set on the feed valve; Calculate the deviation between the real-time opening degree and the first opening degree threshold; If the deviation exceeds a preset deviation threshold, adjust the amplitude of the single action or adjust the preset time interval.

[0091] Optionally, the shut-off module 605 is further configured to: The opening of the feed valve is gradually reduced according to a preset time interval and the amplitude of a single action, and the differential pressure signal is monitored after each gradient reduction. If the differential pressure signal is greater than or equal to the second threshold, the gradient shut-off operation is stopped. or, If the differential pressure signal remains below the second threshold and the feed valve reaches the second opening threshold, the gradient closing action is stopped.

[0092] Optionally, the device further includes: an update module configured to: After each round of gradient control is completed, the differential pressure response curve during this round of gradient control is recorded. The gradient control includes gradient on and gradient off. The differential pressure response curve is compared and analyzed with a preset reference differential pressure response curve; Based on the comparative analysis results, determine the gradient opening and gradient closing actions for the next round of gradient control.

[0093] The above is a schematic scheme of a valve regulating device according to this embodiment. It should be noted that the technical solution of this valve regulating device and the technical solution of the valve regulating method described above belong to the same concept. Details not described in detail in the technical solution of the valve regulating device can be found in the description of the technical solution of the valve regulating method described above. Furthermore, the components in the device embodiment should be understood as functional modules necessary to implement each step of the program flow or each step of the method; these functional modules are not actual functional divisions or separations. A device claim defined by such a set of functional modules should be understood as a functional module architecture that primarily implements the solution through the computer program described in the specification, and not as a physical device that primarily implements the solution through hardware.

[0094] Figure 7 A structural block diagram of a computing device 700 according to an embodiment of this application is shown. The components of the computing device 700 include, but are not limited to, a memory 710 and a processor 720. The processor 720 is connected to the memory 710 via a bus 730, and a database 750 is used to store data.

[0095] The computing device 700 also includes an access device 740, which enables the computing device 700 to communicate via one or more networks 760. Examples of these networks include PSTN (Public Switched Telephone Network), LAN (Local Area Network), WAN (Wide Area Network), PAN (Personal Area Network), or combinations of communication networks such as the Internet. The access device 740 may include one or more of any type of wired or wireless network interface (e.g., NIC (Network Interface Controller)), such as an IEEE 802.11 WLAN (Wireless Local Area Network) wireless interface, Wi-MAX (Worldwide Interoperability for Microwave Access) interface, Ethernet interface, USB (Universal Serial Bus) interface, cellular network interface, Bluetooth interface, and NFC (Near Field Communication).

[0096] In one embodiment of this application, the aforementioned components of the computing device 700 and Figure 7 Other components, not shown, can also be connected to each other, for example, via a bus. It should be understood that... Figure 7 The block diagram of the computing device shown is for illustrative purposes only and is not intended to limit the scope of this application. Those skilled in the art can add or replace other components as needed.

[0097] The computing device 700 can be any type of stationary or mobile computing device, including mobile computers or mobile computing devices (e.g., tablet computers, personal digital assistants, laptop computers, notebook computers, netbooks, etc.), mobile phones (e.g., smartphones), wearable computing devices (e.g., smartwatches, smart glasses, etc.) or other types of mobile devices, or stationary computing devices such as desktop computers or PCs (Personal Computers). The computing device 700 can also be a mobile or stationary server.

[0098] The processor 720 is used to execute computer-executable instructions for the valve adjustment method.

[0099] The above is a schematic representation of a computing device according to this embodiment. It should be noted that the technical solution of this computing device and the technical solution of the valve adjustment method described above belong to the same concept. Details not described in detail in the technical solution of the computing device can be found in the description of the technical solution of the valve adjustment method described above.

[0100] An embodiment of this application also provides a computer-readable storage medium storing a computer program / instructions that, when executed by a processor, implement any of the valve regulation methods described above.

[0101] The above is an illustrative scheme of a computer-readable storage medium according to this embodiment. It should be noted that the technical solution of this storage medium and the technical solution of the valve adjustment method described above belong to the same concept. For details not described in detail in the technical solution of the storage medium, please refer to the description of the technical solution of the valve adjustment method described above.

[0102] An embodiment of this application also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement any of the valve regulation methods described above.

[0103] The above is an illustrative scheme of a computer program product according to this embodiment. It should be noted that the technical solution of this computer program product and the technical solution of the valve adjustment method described above belong to the same concept. For details not described in detail in the technical solution of the computer program product, please refer to the description of the technical solution of the valve adjustment method described above.

[0104] The computer program / instructions include computer program code, which may be in the form of source code, object code, executable file, or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording media, USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, ROM (Read-Only Memory), RAM (Random Access Memory), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium may be appropriately added to or subtracted according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media may not include electrical carrier signals and telecommunication signals.

[0105] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0106] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0107] The preferred embodiments disclosed above are merely illustrative of this application. The optional embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this application. These embodiments are selected and specifically described in this application to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A valve regulating method, characterized in that, include: Collect differential pressure signals between adjacent material units; When the differential pressure signal reaches a first threshold, the feed valve of the first material unit is opened in a gradient manner, wherein the first material unit is the material unit with lower pressure among the adjacent material units, and the gradient opening action is corrected in real time according to the deviation between the real-time opening degree of the feed valve and the first opening threshold. If the differential pressure signal remains below a second threshold for a preset time, the feed valve is gradually closed, wherein the second threshold is less than or equal to the first threshold.

2. The valve adjustment method according to claim 1, characterized in that, The step-by-step opening of the feed valve of the first material unit includes: The opening degree of the feed valve of the first material unit is gradually increased according to a preset time interval and a single action amplitude, wherein the preset time interval is the time interval between two adjacent gradient opening actions.

3. The valve adjustment method according to claim 2, characterized in that, The method further includes: The preset time interval and the amplitude of a single action are set on the control system's operation screen; If the deviation exceeds a preset deviation threshold, the preset time interval and the amplitude of a single action are adjusted on the operation screen of the control system.

4. The valve adjustment method according to claim 2, characterized in that, The gradient opening action is corrected in real time based on the deviation between the real-time opening degree of the feed valve and the first opening threshold, including: During the gradient opening process, the real-time opening degree of the feed valve is obtained by the valve positioner set on the feed valve; Calculate the deviation between the real-time opening degree and the first opening degree threshold; If the deviation exceeds a preset deviation threshold, adjust the amplitude of the single action or adjust the preset time interval.

5. The valve adjustment method according to claim 1, characterized in that, The step-by-step closure of the feed valve includes: The opening of the feed valve is gradually reduced according to a preset time interval and the amplitude of a single action, and the differential pressure signal is monitored after each gradient reduction. If the differential pressure signal is greater than or equal to the second threshold, the gradient shut-off operation is stopped. or, If the differential pressure signal remains below the second threshold and the feed valve reaches the second opening threshold, the gradient closing action is stopped.

6. The valve adjustment method according to claim 5, characterized in that, Also includes: After each round of gradient control is completed, the differential pressure response curve during this round of gradient control is recorded. The gradient control includes gradient on and gradient off. The differential pressure response curve is compared and analyzed with a preset reference differential pressure response curve; Based on the comparative analysis results, determine the gradient opening and gradient closing actions for the next round of gradient control.

7. A valve regulating device, characterized in that, include: The acquisition module is configured to acquire differential pressure signals between adjacent material units; The module is configured to gradually open the feed valve of the first material unit when the differential pressure signal reaches a first threshold, wherein the first material unit is the material unit with lower pressure among the adjacent material units, and the gradual opening action is corrected in real time according to the deviation between the real-time opening degree of the feed valve and the first opening threshold. The shut-off module is configured to gradually close the feed valve when the differential pressure signal remains below a second threshold for a preset time, wherein the second threshold is less than or equal to the first threshold.

8. A computing device, characterized in that, include: Memory and processor; The memory is used to store computer programs / instructions, and the processor is used to execute the computer programs / instructions, wherein when the computer programs / instructions are executed by the processor, they implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program / instructions that, when executed by a processor, implement the method described in any one of claims 1 to 6.

10. A computer program product, characterized in that, Includes a computer program / instruction that, when executed by a processor, implements the method according to any one of claims 1 to 6.

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