Analogous migration pipeline flow threshold control method, device and equipment

Abstract

The application provides a pipeline flow threshold control method, device and equipment based on analog migration. The method comprises the following steps: extracting the working condition characteristics of a target pipeline; determining the current working condition type of the target pipeline and a control problem to be solved corresponding to the working condition type based on the working condition characteristics; configuring a corresponding target auxiliary structure for the target pipeline according to the control problem to be solved; and adjusting the working mode of the target auxiliary structure based on the collected operation characteristics during the process of conveying fluid by the target pipeline. The target auxiliary structure comprises at least one of a buffer device, a plurality of adjusting devices or a bypass pipeline, which are respectively adapted to flow pulsation, working condition step change and a small flow control problem, so that the accuracy of pipeline flow control is improved.

Description

Technical Field

[0001] This application relates to the field of industrial process automatic control technology, and in particular to an analog transfer pipeline flow threshold control method, apparatus and equipment. Background Technology

[0002] In process industries such as petroleum, chemical, synthetic fiber, and pharmaceutical, the same process pipeline often needs to transport media with significantly different temperatures, viscosities, and flow rates at different times. For example, in polyester production, there is the alternating transport of high-temperature melt and room-temperature cleaning media, or the switching of reactor feed between small and large flow rates.

[0003] The relevant technologies mainly adopt the following solutions: First, split-range control, where a single controller controls multiple regulating valves according to the output signal segment to expand the flow range; second, special valves that are resistant to high temperatures and leak-free (such as melt angle valves and bellows sealing valves) are selected to adapt to harsh working conditions; third, parallel branch pipelines are designed, with each branch equipped with valves and instruments adapted to specific working conditions, and media diversion is achieved by switching pipelines; fourth, intelligent control algorithms (such as multi-modal switching control and adaptive control) are combined with intelligent valve positioners to achieve adaptive adjustment of the control strategy.

[0004] However, when faced with multi-condition scenarios where the physical properties of the medium change significantly, the pipeline flow control methods of related technologies are difficult to meet the requirements of low cost, high reliability and global optimal control, resulting in insufficient control accuracy. Summary of the Invention

[0005] This application provides an analog migration pipeline flow threshold control method, apparatus, and device to solve the technical problem of insufficient control accuracy in related technologies.

[0006] In a first aspect, embodiments of this application provide an analog migration-based pipeline flow threshold control method, comprising:

[0007] Extract the operating characteristics of the target pipeline;

[0008] Based on the operating condition characteristics, determine the current operating condition type of the target pipeline and the corresponding control problem to be solved.

[0009] Based on the control problem to be solved, configure the corresponding target auxiliary structure for the target pipeline;

[0010] During the process of transporting fluid in the target pipeline, the working mode of the target auxiliary structure is adjusted based on the collected operating characteristics.

[0011] This application provides an analogous transfer-based pipeline flow threshold control method. By systematically extracting the operating characteristics of the target pipeline, it identifies the current operating condition type and the corresponding control problem to be solved. Then, it matches the appropriate target auxiliary structure according to the type of control problem, and dynamically adjusts the operating mode of the auxiliary structure based on the operating characteristics during fluid transport. Based on the mapping relationship between the identified control problem and the configuration of the auxiliary structure, the system can automatically switch control strategies according to changes in operating conditions, eliminating the need to design separate control schemes for each operating condition and improving the matching accuracy between the control strategy and the actual operating conditions. Simultaneously, real-time adjustment of the operating mode based on operating characteristics enables the system to have dynamic response capabilities, thereby improving control accuracy and operational stability in different operating condition ranges.

[0012] Optionally, according to the control problem to be solved, a corresponding target auxiliary structure is configured for the target pipeline, including:

[0013] When the control problem to be solved indicates that there is a flow pulse change in the target pipeline, a buffer device is configured for the target pipeline as a target auxiliary structure.

[0014] When the control problem to be solved indicates that the target pipeline has a step change in operating conditions, multiple regulating devices are configured for the target pipeline as target auxiliary structures.

[0015] When the control problem to be solved indicates that there is a problem with the accuracy control of a small flow output in the target pipeline, a bypass pipeline is configured as an auxiliary structure for the target pipeline.

[0016] Here, this application precisely matches the corresponding auxiliary structure according to the type of control problem to be solved. For control problems with pulsating flow changes, a buffer device is configured to convert pulsating flow into a stable output using its volumetric storage and dissipation function, reducing pulsating interference in downstream control links. For control problems with stepped changes in operating conditions, multiple regulating devices are configured, each adapting to the regulating needs of different operating ranges. The system can automatically select the matching regulating device to undertake the main regulating task based on the current operating conditions. For control problems with the accuracy control of small flow outputs, a bypass pipeline is configured to convert the regulation of small flow into flow regulation within the controllable range of the valve, improving the control performance of the small flow section. These three configuration methods can be used individually or in combination according to the actual operating characteristics, enabling the same pipeline system to have good control adaptability when facing various different operating conditions.

[0017] Optionally, the buffer device can be any one of a gas buffer tank, a liquid accumulator, or an elevated tank;

[0018] The control resolutions of the multiple adjustment devices are different.

[0019] Here, this application flexibly selects buffer devices according to different media phases. The gas buffer tank is suitable for the pulsation attenuation of gaseous media, the liquid accumulator is suitable for the pulsation absorption of liquid media, and the high-level tank utilizes the potential energy of the liquid level to perform both buffering and pressure stabilization functions. All three can convert pulsating flow into stable output, improving the adaptability of the buffer device to different media. Multiple regulating devices have different control resolutions, allowing each device to adapt to the regulation requirements of different operating ranges. The system can automatically select the regulating device with the matching control resolution to undertake the main regulation task according to the current operating conditions, improving the regulation accuracy and structural reliability of each operating range.

[0020] Optionally, during the fluid transport process in the target pipeline, the operating mode of the target auxiliary structure is adjusted based on the collected operating characteristics, including:

[0021] When the value of the first operating condition parameter is less than the first threshold and the value of the second operating condition parameter is in the first interval, all regulating devices except the first regulating device are in the fully open state along the direction of fluid flow in the target pipeline.

[0022] When the value of the first operating condition parameter is greater than or equal to the first threshold and the value of the second operating condition parameter is in the second range, the first regulating device is in the fully open state or auxiliary regulating state along the direction of fluid flow in the target pipeline.

[0023] Here, this application uses a first threshold and interval conditions to determine the operating parameters and divide the operating range of each regulating device. When the operating condition is in the first interval, all regulating devices except the first regulating device are in a fully open state, and the first regulating device independently completes the flow regulation, utilizing its control resolution advantage to ensure the regulation accuracy under this operating condition. When the operating condition transitions to the second interval, the first regulating device switches to a fully open or auxiliary regulation state, and the subsequent regulating devices undertake the main regulation task, making full use of their structural characteristics to meet the operating requirements under this operating condition. This switching logic ensures that each regulating device operates in its own advantageous range, improving the operational stability of the system across the entire operating range.

[0024] Optionally, a flow divider is provided between the bypass pipe and the target pipe, and the flow divider is used to determine the flow ratio between the bypass pipe and the target pipe.

[0025] Here, this application sets up a flow splitting device between the bypass pipe and the target pipe. The flow resistance ratio of the flow splitting device determines the flow ratio between the two channels, so that the small flow output of the main channel is amplified to the controllable range of the regulating device for adjustment. This reduces the difficulty of the regulating device in the extremely short stroke, improves the problems of insufficient resolution, increased nonlinearity and poor repeatability in the small flow section, and improves the accuracy and stability of small flow control.

[0026] Optionally, the opening degree of different regulating devices may differ under different operating conditions; and under the same operating condition, the opening degree of different regulating devices may differ.

[0027] Here, this application sets different opening degrees for different regulating devices under different operating conditions, and the opening degrees of each regulating device also differ under the same operating condition, so that each regulating device is in its own stable working state, giving full play to its structural characteristics and control capabilities, and improving the control flexibility and operational stability of the system in the entire operating range.

[0028] Secondly, embodiments of this application provide an analog migration-based pipeline flow threshold control device, comprising:

[0029] The acquisition module extracts the operating characteristics of the target pipeline;

[0030] The determination module, based on the operating condition characteristics, determines the current operating condition type of the target pipeline and the corresponding control problem to be solved.

[0031] The analog migration module configures the corresponding target auxiliary structure for the target pipeline according to the control problem to be solved;

[0032] The processing module adjusts the working mode of the target auxiliary structure based on the collected operating characteristics during the fluid transport process in the target pipeline.

[0033] Optionally, the analog migration module is specifically used for:

[0034] When the control problem to be solved indicates that there is a flow pulse change in the target pipeline, a buffer device is configured for the target pipeline as a target auxiliary structure.

[0035] When the control problem to be solved indicates that the target pipeline has a step change in operating conditions, multiple regulating devices are configured for the target pipeline as target auxiliary structures.

[0036] When the control problem to be solved indicates that there is a problem with the accuracy control of a small flow output in the target pipeline, a bypass pipeline is configured as an auxiliary structure for the target pipeline.

[0037] Optionally, the buffer device can be any one of a gas buffer tank, a liquid accumulator, or an elevated tank;

[0038] The control resolutions of the multiple adjustment devices are different.

[0039] Optionally, the processing module is specifically used for:

[0040] When the value of the first operating condition parameter is less than the first threshold and the value of the second operating condition parameter is in the first interval, all regulating devices except the first regulating device are in the fully open state along the direction of fluid flow in the target pipeline.

[0041] When the value of the first operating condition parameter is greater than or equal to the first threshold and the value of the second operating condition parameter is in the second range, the first regulating device is in the fully open state or auxiliary regulating state along the direction of fluid flow in the target pipeline.

[0042] Optionally, a flow divider is provided between the bypass pipe and the target pipe, and the flow divider is used to determine the flow ratio between the bypass pipe and the target pipe.

[0043] Optionally, the opening degree of different regulating devices may differ under different operating conditions; and under the same operating condition, the opening degree of different regulating devices may differ.

[0044] Thirdly, embodiments of this application provide an analog migration-based pipeline flow threshold control device, comprising:

[0045] At least one processor and memory;

[0046] The memory stores the instructions that the computer executes;

[0047] At least one processor executes computer execution instructions stored in memory, causing at least one processor to perform the pipeline flow threshold control method as described in the first aspect above and various possible analog migrations involved in the first aspect.

[0048] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions. When a processor executes the computer-executable instructions, it implements the pipeline flow threshold control method described in the first aspect above and various analog transfers that may be involved in the first aspect.

[0049] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the pipeline flow threshold control method described in the first aspect above and various analog transfers that may be involved in the first aspect.

[0050] This application provides an analog transfer-based pipeline flow threshold control method, apparatus, and device. By systematically extracting the operating characteristics of the target pipeline, it identifies the current operating condition type and the corresponding control problem to be solved. It then matches the appropriate target auxiliary structure according to the type of control problem and dynamically adjusts the operating mode of the auxiliary structure based on the operating characteristics during fluid transport. Based on the mapping relationship between the identified control problem and the configuration of the auxiliary structure, the system can automatically switch control strategies according to changes in operating conditions, eliminating the need to design separate control schemes for each operating condition and improving the matching accuracy between the control strategy and the actual operating conditions. Simultaneously, real-time adjustment of the operating mode based on operating characteristics enables the system to have dynamic response capabilities, thereby improving control accuracy and operational stability in different operating condition ranges. Attached Figure Description

[0051] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0052] Figure 1 A schematic diagram of an analog transfer pipeline flow threshold control system architecture is provided for an embodiment of this application;

[0053] Figure 2 A schematic flowchart of an analog transfer pipeline flow threshold control method provided in an embodiment of this application;

[0054] Figure 3 A schematic diagram illustrating the principle of extremely small flow control provided in this application embodiment;

[0055] Figure 4 A flowchart illustrating a method for adjusting the working mode of a target auxiliary structure, provided in an embodiment of this application;

[0056] Figure 5 This is a schematic diagram of a pipeline valve series configuration provided in an embodiment of this application;

[0057] Figure 6 This application provides schematic diagrams of the valve's operating range under two different working conditions in its embodiments.

[0058] Figure 7 A schematic diagram of the structure of an analog transfer pipeline flow threshold control device provided in an embodiment of this application;

[0059] Figure 8 This is a schematic diagram of the structure of an analog transfer pipeline flow threshold control device provided in an embodiment of this application.

[0060] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0061] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application.

[0062] In related technologies, for the problem of multi-condition flow control in the same pipeline, a split-range control scheme is usually adopted. This involves using a single controller to control multiple regulating valves according to different signal segments to expand the regulation range. However, this scheme assumes that the characteristics of the media controlled by each valve are similar, making it ineffective in handling conditions where the physical properties of the media change significantly. Furthermore, abrupt changes in flow characteristics are prone to occur near the switching point. Another approach is to use high-performance special valves that can simultaneously meet the requirements of multiple operating conditions. While these valves can adapt to a wide temperature range and have good sealing performance, they are expensive, have long delivery cycles, and their control accuracy is often lower than that of conventional regulating valves. Additionally, there are schemes that design parallel branch pipelines to adapt to different operating conditions, but these are costly, require more space, involve complex pipeline switching, and are prone to disturbances during the switching process. There are also schemes that achieve adaptive adjustment through complex control algorithms, but these systems are complex, difficult to debug, and cannot change the physical operating environment of the valves themselves. In summary, the pipeline flow control methods of these technologies struggle to meet the requirements of low cost, high reliability, and high precision control when facing multi-condition scenarios with significant changes in media properties.

[0063] To address the technical problems in related technologies, embodiments of this application provide a pipeline flow threshold control method, apparatus, and device based on analogy transfer. This method draws an analogy between complex flow control challenges and known physical processes or electronic principles. By identifying the characteristics of each operating condition, the most suitable control strategy and auxiliary structure are matched for each operating condition, enabling each control unit to function within its optimal operating range. This achieves efficient flow control across the entire operating range without relying on expensive hardware and complex algorithms.

[0064] Optional, Figure 1 This is a schematic diagram of an analog transfer pipeline flow threshold control system architecture provided in an embodiment of this application. The analog transfer pipeline flow threshold control system is a computer device. Figure 1 In the above architecture, at least one of data acquisition device 101, processing device 102 and display device 103 is included.

[0065] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the architecture of the pipeline flow threshold control system based on analog transfer. In other feasible embodiments of this application, the above architecture may include more or fewer components than illustrated, or combine some components, or split some components, or arrange different components, which can be determined according to the actual application scenario and is not limited here. Figure 1 The components shown can be implemented in hardware, software, or a combination of both.

[0066] In the specific implementation process, the data acquisition device 101 may include an input / output interface or a communication interface, and the data acquisition device 101 can be connected to the processing device through the input / output interface or the communication interface.

[0067] The processing device 102 can draw analogies between complex flow control problems and known physical processes or electronic principles, and match the most suitable control strategy and auxiliary structure for each operating condition based on the characteristics of the operating conditions, so that each control unit can play its role in its optimal operating range, thereby achieving efficient flow control across the entire operating range without relying on expensive hardware and complex algorithms.

[0068] The display device 103 can also be a touch screen or the screen of a terminal device, used to receive user commands while displaying the above-mentioned content, so as to realize interaction with the user.

[0069] It should be understood that the aforementioned processing device can be implemented by a processor reading instructions from memory and executing those instructions, or it can be implemented by a chip circuit.

[0070] Furthermore, the network architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0071] Figure 2 This is a flowchart illustrating an analogous migration-based pipeline flow threshold control method provided in this application. The execution entity of this application embodiment can be... Figure 1 The processor 102 in the code can be specifically executed based on the actual application scenario. For example... Figure 2 As shown, the method may include:

[0072] S201. Extract the operating characteristics of the target pipeline.

[0073] Optionally, the target pipeline can be a material transport pipeline in a chemical production process, such as a polymer melt transport pipeline, a reactant feed pipeline, or an intermediate product transfer pipeline; it can also be an oil and gas mixed transport pipeline, a water injection pipeline, or a gathering and transport pipeline in the oil and gas industry; or it can be a process fluid transport pipeline in the pharmaceutical, food, and other industries. This application does not limit the specific application scenario of the target pipeline. As long as the target pipeline experiences multiple different chemical conditions during operation and requires flow threshold control, the method provided in this application can be applied. Correspondingly, the fluid transported by the target pipeline can be a gaseous medium, a liquid medium, or a gas-liquid mixture; it can also be a high-viscosity melt, slurry, or multiphase fluid. This application does not limit this.

[0074] Optionally, the operating characteristics may include at least one of the following: temperature range, medium physical properties, flow rate requirement range, differential pressure conditions, control accuracy requirements, and special process requirements. Specifically, the temperature range characterizes the operating temperature range of the target pipeline and can be divided into multiple ranges according to actual process requirements; the medium physical properties include one or more of the following: viscosity, density, phase, presence of solid particles, and corrosiveness; the flow rate requirement range includes at least one of the following: normal flow rate range, minimum controllable flow rate, maximum throughput flow rate, and commonly used flow rate adjustment range; the differential pressure conditions include one or more of the following: magnitude, stability, and range of variation of the differential pressure across the valve; the control accuracy requirements characterize the allowable deviation range of flow control under different operating conditions (e.g., ±1%, ±5%, ±10%); and the special process requirements include at least one of the following: leak prevention level, anti-clogging requirements, response speed requirements, and cleanliness requirements.

[0075] S202. Based on the operating condition characteristics, determine the current operating condition type of the target pipeline and the corresponding control problem to be solved.

[0076] Specifically, based on the analysis results of the operating condition characteristics, core control objectives and main constraints are established for each operating condition, thereby identifying the corresponding control problems to be solved.

[0077] For example, when the operating condition characteristics indicate that the target pipeline is in a low temperature, low flow rate, and high pressure differential condition, the core control objective corresponding to this operating condition type is high-precision flow regulation. The main constraint is the controllability of the valve in the small opening range, including dead zone, hysteresis, and turndown ratio. The corresponding control problem to be solved is the high-precision control problem in the small flow range.

[0078] When the operating conditions indicate that the target pipeline is in a high-temperature, high-flow-rate, and low-pressure-difference condition, the core control objectives corresponding to this type of operating condition are high-flow-rate capacity and structural reliability. The main constraints are the temperature resistance of valve materials and the reliability of sealing structures. The corresponding control problems to be solved are the sealing and flow guarantee issues in the high-temperature range.

[0079] When the operating condition characteristics indicate that the target pipeline is transporting viscous or easily crystallizing media, the core control objective corresponding to this operating condition type is to prevent media blockage and stagnation. The main constraints are the unobstructed flow path of the valve and the design without dead zones. The corresponding control problem to be solved is the flow path blockage protection problem.

[0080] When the operating conditions indicate that the target pipeline has pulsating or unstable flow conditions, the core control objective corresponding to this type of operating condition is flow smoothing and fluctuation suppression. The main constraint is the balance between the system's buffering capacity and response speed, and the corresponding control problem to be solved is the flow pulsation suppression problem.

[0081] It should be noted that the above operating condition types are merely illustrative examples. In practical applications, the target pipeline may simultaneously possess a combination of multiple operating condition characteristics, and this application embodiment does not limit this. The system can comprehensively determine the current operating condition type based on multi-dimensional information of the operating condition characteristics and identify the corresponding control problem to be solved, providing a basis for the subsequent configuration of auxiliary structures.

[0082] S203. Configure the corresponding target auxiliary structure for the target pipeline according to the control problem to be solved.

[0083] Optionally, according to the control problem to be solved, a corresponding target auxiliary structure is configured for the target pipeline, including:

[0084] When the control problem to be solved indicates that there is a flow pulse change in the target pipeline, a buffer device is configured for the target pipeline as a target auxiliary structure.

[0085] When the control problem to be solved indicates that the target pipeline has a step change in operating conditions, multiple regulating devices are configured for the target pipeline as target auxiliary structures.

[0086] When the control problem to be solved indicates that there is a problem with the accuracy control of a small flow output in the target pipeline, a bypass pipeline is configured as an auxiliary structure for the target pipeline.

[0087] Here, this application precisely matches the corresponding auxiliary structure according to the type of control problem to be solved. For control problems with pulsating flow changes, a buffer device is configured to convert pulsating flow into a stable output using its volumetric storage and dissipation function, reducing pulsating interference in downstream control links. For control problems with stepped changes in operating conditions, multiple regulating devices are configured, each adapting to the regulating needs of different operating ranges. The system can automatically select the matching regulating device to undertake the main regulating task based on the current operating conditions. For control problems with the accuracy control of small flow outputs, a bypass pipeline is configured to convert the regulation of small flow into flow regulation within the controllable range of the valve, improving the control performance of the small flow section. These three configuration methods can be used individually or in combination according to the actual operating characteristics, enabling the same pipeline system to have good control adaptability when facing various different operating conditions.

[0088] In one possible implementation, the target pipeline is the feed pipeline for a reaction aid in a chemical reactor. A reciprocating metering pump is installed at the front end of this pipeline to deliver the reaction aid. Due to the intermittent suction and discharge characteristics of the reciprocating metering pump, the flow rate within the pipeline exhibits a periodic pulsating waveform. The process requires a stable and precise low-flow-rate supply of the reaction aid to the downstream reactor. In this scenario, the operating characteristics indicate flow rate pulsation in the target pipeline, and the corresponding control problem to be solved is the flow rate pulsation control problem. Therefore, a buffer device needs to be configured for the target pipeline as an auxiliary structure.

[0089] Optionally, the buffer device can be any one of a gas buffer tank, a liquid accumulator, or an elevated tank;

[0090] The control resolutions of the multiple adjustment devices are different.

[0091] Here, this application flexibly selects buffer devices according to different media phases. The gas buffer tank is suitable for the pulsation attenuation of gaseous media, the liquid accumulator is suitable for the pulsation absorption of liquid media, and the high-level tank utilizes the potential energy of the liquid level to perform both buffering and pressure stabilization functions. All three can convert pulsating flow into stable output, improving the adaptability of the buffer device to different media. Multiple regulating devices have different control resolutions, allowing each device to adapt to the regulation requirements of different operating ranges. The system can automatically select the regulating device with the matching control resolution to undertake the main regulation task according to the current operating conditions, improving the regulation accuracy and structural reliability of each operating range.

[0092] In this embodiment, the buffer device is specifically an accumulator, installed on the pipeline between the outlet of the reciprocating metering pump and the regulating valve. The accumulator's shell is a sealed pressure vessel, internally divided into a gas chamber and a liquid chamber by a flexible air bladder. The gas chamber is pre-filled with an inert gas (such as nitrogen) at a certain pressure, while the liquid chamber is connected to the fluid in the pipeline. When the metering pump's discharge flow rate is at a pulsating peak, the pipeline pressure increases, the fluid compresses the air bladder into the liquid chamber, the gas is compressed, and excess energy is stored. When the metering pump's discharge flow rate is at a pulsating trough, the pipeline pressure decreases, the air bladder expands, and the fluid in the liquid chamber is forced back into the pipeline, releasing the stored energy, thereby smoothing out pressure and flow fluctuations within the pipeline.

[0093] Through the accumulator's storage and dissipation function, the originally periodically pulsating flow is transformed into a relatively stable continuous flow, providing stable inflow conditions for the downstream control valve. The control valve is installed downstream of the accumulator; since the inflow has become relatively stable, a conventional control valve can achieve precise small-flow control. The control valve receives feedback signals from the downstream flow meter and adjusts the valve opening using a proportional-integral-derivative (PID) controller to maintain a constant downstream flow.

[0094] In another possible implementation, the target pipeline is the feed pipeline for a catalyst solution in a fine chemical plant, where the process requires precise supply of the catalyst solution to the microreactor at extremely low flow rates (e.g., on the order of 0.1 to 10 mL / min). In this scenario, the operating characteristics indicate a problem with the precision control of the low-flow-rate output of the target pipeline; therefore, a bypass pipeline and a diversion device are needed as auxiliary structures for the target pipeline.

[0095] Optionally, a flow divider is provided between the bypass pipe and the target pipe, and the flow divider is used to determine the flow ratio between the bypass pipe and the target pipe.

[0096] Here, this application sets up a flow splitting device between the bypass pipe and the target pipe. The flow resistance ratio of the flow splitting device determines the flow ratio between the two channels, so that the small flow output of the main channel is amplified to the controllable range of the regulating device for adjustment. This reduces the difficulty of the regulating device in the extremely short stroke, improves the problems of insufficient resolution, increased nonlinearity and poor repeatability in the small flow section, and improves the accuracy and stability of small flow control.

[0097] In this embodiment, the flow divider is a laminar flow divider, which consists of a large number of capillaries or microchannels connected in parallel. It is installed on the feed channel of the target pipeline and divides the total flow into two paths at a fixed ratio: the discharge channel (the main channel of the target pipeline) outputs an extremely small flow, while the bypass channel's flow is N times the main channel's flow (N is greater than or equal to 10). Since the flow rate is proportional to the pressure gradient in laminar flow (as per Poiseuille's law), and the capillary resistance is proportional to its length and inversely proportional to the fourth power of its radius, this flow ratio has good stability and repeatability. A regulating valve is installed on the feed channel, whose flow rate is tens of times that of the discharge channel, falling within the controllable flow range of the regulating valve. The regulating valve operates in the linear segment of its flow characteristic curve, ensuring control accuracy and repeatability. A flow meter is also installed on the feed channel to measure the large flow rate of this channel. Because the measured object is a flow rate of conventional magnitude, the measurement accuracy is much higher than when directly measuring extremely small flow rates.

[0098] The number and inner diameter of the capillaries in a laminar flow splitter need to be designed based on the target flow range and flow ratio requirements. For example, when the target flow rate is 0.5 mL / min and the flow ratio is 50, a capillary inner diameter of 50 μm and a quantity of 100 capillaries are selected to ensure that the splitter operates in laminar flow conditions. This design is achieved through precision machining of micron-level flow channels on a substrate and is suitable for applications with high requirements for size and integration.

[0099] During operation, the control system employs a distributed control system (DCS), which integrates a PID control module. The regulating valve receives control signals from the DCS, and the PID control module calculates the target opening of the regulating valve based on feedback signals from the flow meter. This control signal is then transmitted to the valve's actuator via the DCS's output module, maintaining a constant downstream flow. Because a fixed proportional relationship exists between the inlet and outlet flow rates, determined by the flow resistance ratio of the distributor, the outlet flow rate equals the inlet flow rate divided by the flow ratio N, thus indirectly achieving a precise and stable extremely small flow output.

[0100] Optionally, the inner diameter and number of capillaries in the laminar flow splitter can be designed according to the target flow range and flow ratio requirements. For example, when the target flow rate is 0.5 mL / min and the flow ratio is 50, the total flow rate of the feed channel is 25 mL / min. The laminar flow splitter can select capillaries with appropriate inner diameters and determine the number of parallel capillaries based on this flow range to maintain laminar flow under this condition. Optionally, the laminar flow splitter can also be a micro-channel structure, where micron-level channels are etched into the substrate through precision machining to achieve the flow splitting function, suitable for applications with high requirements for size and integration.

[0101] It should be noted that the core idea of ​​this embodiment is not to directly adjust and measure extremely small flow rates, but to transform the control problem of extremely small flow rates into the control problem of conventional flow rates in the bypass channel through a laminar flow splitter, i.e., controlling small flow rates with large flow rates. Since both the regulating valve and the flow meter operate within the conventional flow range, it avoids problems such as the difficulty in manufacturing small-diameter valves, the distortion of flow characteristics at small openings, and the decrease in measurement accuracy in small ranges. Without introducing special valves and complex control algorithms, it achieves precise and stable control of extremely small flow rates. This solution can cover the control needs of extremely small flow rates down to 0.1 mL / min at full scale.

[0102] Figure 3 Please refer to the schematic diagram of an extremely small flow control principle provided in this application embodiment. Figure 3 ,include:

[0103] Figure 3 This demonstrates the overall principle and structure of extremely low flow control. Fluid enters through the feed channel with a flow rate of n. After passing through a distributor, it is divided into two paths: one is a bypass channel with a flow rate of n-1; the other is the discharge channel, which is the main channel of the target pipeline, with a flow rate of 1. The ratio of the flow rate in the bypass channel to the flow rate in the discharge channel is (n-1):1, and this ratio is determined by the flow resistance ratio of the distributor.

[0104] As a distributed control system, the DCS is responsible for acquiring operating parameters, calculating control signals, and outputting output. The DCS acquires the flow measurement signal on the feed channel, compares it with the target flow setpoint, calculates the control output through the internally integrated PID control module, and transmits the control signal to the actuator of the regulating valve on the feed channel to adjust the valve opening and make the feed flow rate accurately and stably maintain the setpoint n.

[0105] Because there is a fixed proportional relationship between the flow rate of the discharge channel and the flow rate of the feed channel, determined by the flow resistance ratio of the distributor, when the feed flow rate is precisely controlled to a set value n, the output flow rate of the discharge channel is 1 / n of the input flow rate of the feed channel, thus achieving precise and stable control of extremely small flow rates. This scheme transforms the direct control problem of extremely small flow rates into the control problem of conventional flow rates in the feed channel. Both the regulating valve and the flow meter operate within their controllable flow range, avoiding problems such as the difficulty in processing small-diameter valves, the distortion of flow characteristics at small openings, and the decrease in measurement accuracy in small ranges.

[0106] Furthermore, for situations where there are multiple different operating conditions on the same pipeline and the operating conditions change in a stepwise manner, multiple regulating devices with different characteristic focuses can be configured on the target pipeline, so that each device can adapt to the regulating needs of different operating condition ranges. Automatic switching of control modes can be achieved by judging the threshold of operating condition parameters. The specific configuration method and switching logic will be described in detail in subsequent embodiments in conjunction with specific scenarios.

[0107] S204. During the process of transporting fluid in the target pipeline, adjust the working mode of the target auxiliary structure based on the collected operating characteristics.

[0108] For target pipelines equipped with buffer devices, when the operating characteristic parameters indicate changes in the amplitude or frequency of flow pulsation within the pipeline, the operating parameters of the buffer device can be adjusted accordingly. For example, the pre-charge gas pressure of the accumulator can be adjusted to adapt to the storage and release requirements under the current pulsating operating conditions, thereby maintaining the stability of the downstream output flow.

[0109] For a target pipeline equipped with multiple regulating devices, the adjustment of the operating mode mainly involves the switching control between these devices. Specifically, the system monitors operating parameters in real time, triggering a switching of the control mode when the operating parameters cross preset thresholds. These operating parameters include a first operating parameter and a second operating parameter; the first operating parameter can be temperature, and the second operating parameter can be flow rate. When the value of the first operating parameter is less than the first threshold and the value of the second operating parameter is within a first range, all regulating devices except the first regulating device are fully open along the direction of fluid flow within the target pipeline, with the first regulating device undertaking all regulating functions. When the value of the first operating parameter is greater than or equal to the first threshold and the value of the second operating parameter is within a second range, the first regulating device is fully open or in an auxiliary regulating state along the direction of fluid flow within the target pipeline, with subsequent regulating devices undertaking the main flow rate regulation task.

[0110] Optionally, to prevent frequent switching of the control system due to fluctuations in operating parameters near preset thresholds, a switching dead zone is set based on the preset thresholds. Specifically, the operating parameter needs to cross from one side of the preset threshold to the other and pass the dead zone boundary before the switching of the operating mode is triggered. For example, when the temperature parameter rises from below the first threshold, the switching is triggered only when the temperature value rises to the first threshold plus the dead zone width; when the temperature parameter falls from above the first threshold, the switching is triggered only when the temperature value falls to the first threshold minus the dead zone width. By setting the switching dead zone, the system maintains the current operating mode without switching near the critical operating point, suppressing frequent switching caused by small parameter fluctuations, reducing the wear risk of the regulating device's actuator, and improving the continuity and stability of system operation.

[0111] For example, when the temperature rises from below a first threshold (e.g., 150°C), it needs to rise to 155°C before switching is triggered; when the temperature falls from above the first threshold, it needs to fall to 145°C before switching is triggered. This dead zone width is ±5°C and is implemented through the logic module of the distributed control system (DCS) to ensure that the system maintains stable operation near the critical operating point.

[0112] Optionally, the opening degree of different regulating devices varies under different operating conditions; even under the same operating condition, the opening degree of different regulating devices also varies. Each regulating device is in its optimal operating state, giving full play to its structural characteristics and control capabilities, while taking into account both the regulating accuracy and structural reliability within each operating condition range.

[0113] For target pipelines equipped with bypass pipes and diverter devices, the adjustment of the operating mode is mainly reflected in the adjustment of the opening degree of the regulating valve on the bypass channel. Specifically, the DCS collects the flow signal on the feed channel in real time, compares the measured flow value with the target flow setpoint, calculates the control output through a PID control algorithm, and transmits the control signal to the actuator of the regulating valve on the bypass channel to adjust the valve opening, so that the feed flow rate is accurately stabilized at the set value. Since there is a fixed proportional relationship between the flow rate of the discharge channel and the flow rate of the feed channel, determined by the flow resistance ratio of the diverter, when the feed flow rate is accurately controlled, even a very small flow rate in the discharge channel can obtain a precise and stable output.

[0114] This application provides an analogous transfer-based pipeline flow threshold control method. By systematically extracting the operating characteristics of the target pipeline, it identifies the current operating condition type and the corresponding control problem to be solved. Then, it matches the appropriate target auxiliary structure according to the type of control problem, and dynamically adjusts the operating mode of the auxiliary structure based on the operating characteristics during fluid transport. Based on the mapping relationship between the identified control problem and the configuration of the auxiliary structure, the system can automatically switch control strategies according to changes in operating conditions, eliminating the need to design separate control schemes for each operating condition and improving the matching accuracy between the control strategy and the actual operating conditions. Simultaneously, real-time adjustment of the operating mode based on operating characteristics enables the system to have dynamic response capabilities, thereby improving control accuracy and operational stability in different operating condition ranges.

[0115] exist Figure 2 Based on the embodiments shown, the following, in conjunction with Figure 4 The method of adjusting the working mode of the target auxiliary structure based on the collected operating characteristics during the fluid transport process in the target pipeline, as described in the above analogous transfer pipeline flow threshold control method, is explained in detail.

[0116] Figure 4 A flowchart illustrating a method for adjusting the working mode of a target auxiliary structure as provided in this application embodiment is available in the following diagram: Figure 4 ,include:

[0117] S401. When the value of the first operating condition parameter is less than the first threshold and the value of the second operating condition parameter is in the first interval, all regulating devices except the first regulating device are in the fully open state along the direction of fluid flow in the target pipeline.

[0118] In one possible implementation, the target pipeline is a melt delivery pipeline in a polyester production unit. This pipeline operates under two significantly different conditions at different times: During normal production, the pipeline delivers high-viscosity polyester melt with a medium temperature ranging from 250 to 290°C, a flow rate ranging from 10 to 50 m³ / h, and a relatively stable pressure difference of 10 to 50 kPa across the valves. The process places high demands on the valves' temperature resistance, sealing performance, and the absence of dead zones in the flow path. During cleaning or switching phases, the pipeline delivers low-viscosity cleaning fluid with a medium temperature ranging from room temperature to 100°C, a flow rate ranging from 0.5 to 5 m³ / h, a larger and more varied pressure difference, and higher control precision is required for the smaller flow rate range. In this scenario, the operating characteristics indicate that the target pipeline experiences a stepped change in operating conditions. The corresponding control problem to be solved is the step-change operating condition control problem. Therefore, multiple regulating devices need to be configured as auxiliary structures for the target pipeline.

[0119] Optionally, the opening degree of different regulating devices may differ under different operating conditions; and under the same operating condition, the opening degree of different regulating devices may differ.

[0120] Here, this application sets different opening degrees for different regulating devices under different operating conditions, and the opening degrees of each regulating device also differ under the same operating condition, so that each regulating device is in its own stable working state, giving full play to its structural characteristics and control capabilities, and improving the control flexibility and operational stability of the system in the entire operating range.

[0121] In practice, the opening settings of different regulating devices need to be dynamically adjusted according to the operating conditions. For example, in high-temperature melt conveying conditions, the opening of the first regulating device (melt valve) is 60%~80%, while subsequent regulating devices (conventional valves) remain fully open; in low-temperature cleaning conditions, the opening of the first regulating device (conventional valve) is 20%~80%, while the melt valve remains fully open. Under the same operating condition, the difference in the opening of different regulating devices is achieved through preset PID parameter tuning rules, ensuring that each device operates within its corresponding working range.

[0122] In this embodiment, two regulating valves with different characteristics are installed in series on the same pipeline. The first valve is a conventional jacketed insulated regulating valve, possessing a first control resolution suitable for high-precision flow control of media at room to medium temperatures. The second valve is a jacketed angle-type bellows-sealed melt control valve, possessing a second control resolution, temperature resistance suitable for high-temperature operating conditions, a bellows-sealed sealing structure, and an angle-type, dead-angle-free flow channel design suitable for the transport and control of high-temperature melts. The first control resolution is superior to the second, and the complementary characteristics of the two valves allow the system to select the optimal control path under different operating conditions.

[0123] During operation, the distributed control system (DCS) collects operating parameters in real time through temperature sensors and flow meters installed on the pipeline, and automatically switches control modes based on the threshold values ​​of these parameters. Specifically, the first operating parameter is the medium temperature, the second operating parameter is the flow command value, the first threshold is 150℃, the first interval corresponds to the flow range under low-temperature conditions, and the second interval corresponds to the flow range under high-temperature conditions. When the value of the first operating parameter is less than the first threshold and the value of the second operating parameter is within the first interval, i.e., the system is in a low-temperature, low-flow condition, the second valve is fully open along the direction of fluid flow in the target pipeline, without substantially obstructing the flow field. The first valve undertakes all the regulation functions, achieving high-precision control within its operating range (opening degree of 20% to 80%). At this time, leakage problems under high-temperature conditions do not exist, and the control precision advantage of the first valve is fully utilized. In this control mode, the second valve remains 100% fully open, minimizing pipeline resistance, and the first valve independently completes all flow regulation tasks with its superior first control resolution, ensuring regulation accuracy under this condition.

[0124] S402. When the value of the first operating condition parameter is greater than or equal to the first threshold and the value of the second operating condition parameter is in the second interval, the first regulating device is in the fully open state or auxiliary regulating state along the direction of fluid flow in the target pipeline.

[0125] When the value of the first operating condition parameter is greater than or equal to the first threshold (i.e., the medium temperature rises to 150℃ or above) and the value of the second operating condition parameter is within the second range, that is, when the system transitions to a high-temperature, high-flow-rate operating condition, along the direction of fluid flow in the target pipeline, the first valve is in a fully open or auxiliary regulation state, and the second valve closes from the fully open position to a preset opening degree (the value ranges from 60% to 80%, and the specific value can be adjusted according to the actual operating condition parameters and valve characteristics), undertaking the main flow regulation task. The angled flow channel of the second valve has no dead corners, and the high-temperature melt will not remain and degrade inside it. The bellows sealing structure meets the sealing requirements under this operating condition. In this control mode, the second valve, with its advantages of temperature resistance, sealing, and no dead corners in the flow channel, undertakes the main regulation task under high-temperature, high-flow-rate conditions, while the first valve switches to a fully open or auxiliary regulation state. The two are automatically switched by judging the threshold of the operating condition parameters.

[0126] Optionally, to prevent frequent switching of the control system due to fluctuations in temperature parameters near the first threshold, a switching dead zone is set based on the first threshold, with a dead zone width of ±5℃. Specifically, when the temperature parameter rises from below the first threshold, switching is triggered only when the temperature value reaches the first threshold plus the dead zone width; when the temperature parameter falls from above the first threshold, switching is triggered only when the temperature value falls to the first threshold minus the dead zone width. By setting the switching dead zone, the system maintains its current operating mode near the critical operating point without switching, suppressing frequent switching caused by small temperature fluctuations, reducing the wear risk of the valve actuator, and improving the continuity and stability of system operation.

[0127] Figure 5 Please refer to the schematic diagram of a pipeline valve series configuration provided in this application embodiment. Figure 5 ,include:

[0128] Figure 5This demonstrates the configuration of two control valves with different characteristics installed in series on the same pipeline. Two control valves, V1 and V2, are installed in series along the direction of fluid flow within the target pipeline. Valve V1 is a conventional jacketed insulated control valve with a first control resolution, suitable for high-precision flow control of media at normal to medium temperatures. Valve V2 is a jacketed angle-type bellows-sealed melt control valve with a second control resolution, temperature resistance suitable for high-temperature operating conditions, a bellows seal, and an angle-type flow channel design without dead angles, suitable for the transport and control of high-temperature melts. The first control resolution is superior to the second control resolution, and the complementary characteristics of the two valves allow the system to select the optimal control path under different operating conditions.

[0129] Figure 6 For schematic diagrams of the valve operating range under two working conditions provided in the embodiments of this application, please refer to... Figure 6 ,include:

[0130] Figure 6 This diagram illustrates the division of valve pressure operating ranges under two different operating conditions. The figure uses pressure as the vertical axis and marks three key pressure values: 50 kPa, 300 kPa, and 450 kPa, used to define the operating ranges of the two control valves under different conditions.

[0131] The pressure range of 50 kPa to 300 kPa corresponds to the valve operating range under the first operating condition (low temperature, low flow rate). In this range, the first valve (V1) performs the main regulation function, while the second valve (V2) is fully open. The pressure range of 300 kPa to 450 kPa corresponds to the valve operating range under the second operating condition (high temperature, high flow rate). In this range, the second valve (V2) performs the main regulation task, while the first valve (V1) is fully open or in an auxiliary regulation state. The 300 kPa mark is the switching threshold between the two operating conditions. Combined with the setting of the switching dead zone, this prevents the system from frequently switching operating modes due to pressure fluctuations near this threshold.

[0132] Optionally, during the fluid transport process in the target pipeline, the operating mode of the target auxiliary structure is adjusted based on the collected operating characteristics, including:

[0133] When the value of the first operating condition parameter is less than the first threshold and the value of the second operating condition parameter is in the first interval, all regulating devices except the first regulating device are in the fully open state along the direction of fluid flow in the target pipeline.

[0134] When the value of the first operating condition parameter is greater than or equal to the first threshold and the value of the second operating condition parameter is in the second range, the first regulating device is in the fully open state or auxiliary regulating state along the direction of fluid flow in the target pipeline.

[0135] Here, this application uses a first threshold and interval conditions to determine the operating parameters and divide the operating range of each regulating device. When the operating condition is in the first interval, all regulating devices except the first regulating device are in a fully open state, and the first regulating device independently completes the flow regulation, utilizing its control resolution advantage to ensure the regulation accuracy under this operating condition. When the operating condition transitions to the second interval, the first regulating device switches to a fully open or auxiliary regulation state, and the subsequent regulating devices undertake the main regulation task, making full use of their structural characteristics to meet the operating requirements under this operating condition. This switching logic ensures that each regulating device operates in its own advantageous range, improving the operational stability of the system across the entire operating range.

[0136] Figure 7 A schematic diagram of a pipeline flow threshold control device based on analog migration provided in this application. Please refer to... Figure 7 The analog migration pipeline flow threshold control device 700 includes an acquisition module 701, a determination module 702, an analog migration module 703, and a processing module 704, wherein:

[0137] The acquisition module 701 extracts the operating characteristics of the target pipeline;

[0138] The determination module 702, based on the operating condition characteristics, determines the current operating condition type of the target pipeline and the corresponding control problem to be solved.

[0139] Analogous to migration module 703, configure the corresponding target auxiliary structure for the target pipeline according to the control problem to be solved;

[0140] The processing module 704 adjusts the working mode of the target auxiliary structure based on the collected operating characteristics during the fluid transport process in the target pipeline.

[0141] Optionally, the analog migration module 703 is specifically used for:

[0142] When the control problem to be solved indicates that there is a flow pulse change in the target pipeline, a buffer device is configured for the target pipeline as a target auxiliary structure.

[0143] When the control problem to be solved indicates that the target pipeline has a step change in operating conditions, multiple regulating devices are configured for the target pipeline as target auxiliary structures.

[0144] When the control problem to be solved indicates that there is a problem with the accuracy control of a small flow output in the target pipeline, a bypass pipeline is configured as an auxiliary structure for the target pipeline.

[0145] Optionally, the buffer device can be any one of a gas buffer tank, a liquid accumulator, or an elevated tank;

[0146] The control resolutions of the multiple adjustment devices are different.

[0147] Optionally, the processing module 704 is specifically used for:

[0148] When the value of the first operating condition parameter is less than the first threshold and the value of the second operating condition parameter is in the first interval, all regulating devices except the first regulating device are in the fully open state along the direction of fluid flow in the target pipeline.

[0149] When the value of the first operating condition parameter is greater than or equal to the first threshold and the value of the second operating condition parameter is in the second range, the first regulating device is in the fully open state or auxiliary regulating state along the direction of fluid flow in the target pipeline.

[0150] Optionally, a flow divider is provided between the bypass pipe and the target pipe, and the flow divider is used to determine the flow ratio between the bypass pipe and the target pipe.

[0151] Optionally, the opening degree of different regulating devices may differ under different operating conditions; and under the same operating condition, the opening degree of different regulating devices may differ.

[0152] This embodiment provides an analog migration pipeline flow threshold control device that can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0153] Figure 8 This is a schematic diagram of a pipeline flow threshold control device based on analog migration, provided in this embodiment. Please refer to... Figure 8 The diagram illustrates a structural schematic of a pipeline flow threshold control device 800 suitable for implementing analog transfer in this embodiment. The pipeline flow threshold control device 800 can include, but is not limited to, mobile terminals such as laptops and tablets (Portable Android Devices, PADs), and fixed terminals such as digital TVs and desktop computers. Figure 8 The analogous migration pipeline flow threshold control device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0154] like Figure 8As shown, the analog-migrated pipe flow threshold control device 800 may include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.) 801, which can perform various appropriate actions and processes according to a program stored in read-only memory (ROM) 802 or a program loaded from storage device 808 into random access memory (RAM) 803. The random access memory 803 also stores various programs and data required for the operation of the analog-migrated pipe flow threshold control device 800. The processing unit 801, ROM 802, and RAM 803 are interconnected via a bus 804. An input / output (I / O) interface 805 is also connected to the bus 804.

[0155] Typically, the following devices can be connected to I / O interface 805: input devices 806 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 807 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 808 including, for example, magnetic tapes, hard disks, etc.; and communication devices 809. Communication device 809 allows the analog-migrated pipeline flow threshold control device 800 to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 8 A pipeline flow threshold control device 800 with various devices is shown, but it should be understood that implementation or having all of the devices shown is not required. More or fewer devices may be implemented or included alternatively.

[0156] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device 809, or installed from a storage device 808, or installed from a read-only memory 802. When the computer program is executed by the processing device 801, it performs the functions defined in the methods of the embodiments of this application.

[0157] It should be noted that the computer-readable medium described above in this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0158] The aforementioned computer-readable medium may be included in the analog transfer pipeline flow threshold control device; or it may exist independently and not assembled into the analog transfer pipeline flow threshold control device.

[0159] The aforementioned computer-readable medium carries one or more programs that, when executed by the analog-migrated pipeline flow threshold control device, cause the analog-migrated pipeline flow threshold control device to perform the method shown in the above embodiments.

[0160] This application provides a computer-readable storage medium storing computer-executable instructions. When a processor executes the computer-executable instructions, it implements various methods that may be involved in the above embodiments.

[0161] This application provides a computer program product, including a computer program that, when executed by a processor, implements various methods that may be involved in the above embodiments.

[0162] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0163] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0164] The functions described above in this document can be performed at least in part by one or more hardware logic components. For example, exemplary types of hardware logic components that can be used, without limitation, include: field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), system-on-a-chip (SoCs), complex programmable logic devices (CPLDs), and so on.

[0165] In the context of this application, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0166] It should be noted that the terms "a" and "a plurality of" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0167] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

[0168] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope.

Claims

1. A pipeline flow threshold control method based on analogy migration, characterized in that, include: Extract the operating characteristics of the target pipeline; Based on the operating characteristics, the current operating condition type of the target pipeline and the corresponding control problem to be solved are determined. According to the control problem to be solved, configure the corresponding target auxiliary structure for the target pipeline; During the process of transporting fluid in the target pipeline, the working mode of the target auxiliary structure is adjusted based on the collected operating characteristics.

2. The method according to claim 1, characterized in that, The step of configuring a corresponding target auxiliary structure for the target pipeline according to the control problem to be solved includes: When the control problem to be solved indicates that there is a flow pulse change in the target pipeline, a buffer device is configured for the target pipeline as an auxiliary structure for the target; When the control problem to be solved indicates that the target pipeline has a step change in operating conditions, multiple regulating devices are configured for the target pipeline as the target auxiliary structure. When the control problem to be solved indicates that the target pipeline has a minor flow output accuracy control problem, a bypass pipeline is configured as the target auxiliary structure for the target pipeline.

3. The method according to claim 2, characterized in that, The buffer device is any one of a gas buffer tank, a liquid accumulator, or an elevated tank. The control resolutions of the various regulating devices are different.

4. The method according to claim 2, characterized in that, During the process of transporting fluid in the target pipeline, the working mode of the target auxiliary structure is adjusted based on the collected operating characteristics, including: When the value of the first operating condition parameter is less than the first threshold and the value of the second operating condition parameter is in the first interval, all the regulating devices except the first regulating device are in the fully open state along the direction of fluid flow in the target pipeline. When the value of the first operating condition parameter is greater than or equal to the first threshold and the value of the second operating condition parameter is in the second interval, the first regulating device is in a fully open state or an auxiliary regulating state along the direction of fluid flow in the target pipeline.

5. The method according to claim 2, characterized in that, A flow divider is provided between the bypass pipe and the target pipe, and the flow divider is used to determine the flow ratio between the bypass pipe and the target pipe.

6. The method according to claim 4, characterized in that, The opening degree of the different regulating devices varies under different operating conditions; the opening degree of the different regulating devices also varies under the same operating condition.

7. A pipeline flow threshold control device based on analog transfer, characterized in that, include: The acquisition module extracts the operating characteristics of the target pipeline; The determination module, based on the operating condition characteristics, determines the current operating condition type of the target pipeline and the corresponding control problem to be solved. The analog migration module configures a corresponding target auxiliary structure for the target pipeline according to the control problem to be solved. The processing module adjusts the working mode of the target auxiliary structure based on the collected operating characteristics during the fluid transport process in the target pipeline.

8. An analogous migration-based pipeline flow threshold control device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in any one of claims 1 to 6.

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

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

Images