An oil station control system and method for a large hydraulic control gate valve

Abstract

This invention belongs to the field of gas station control technology, specifically a gas station control system and method for a large hydraulic gate valve. It includes a hydraulic oil quality dynamic monitoring module, a gas station flow rate coordination and adaptation module, a gas station hydraulic pressure compensation module, a gate valve opening closed-loop control module, a gate valve operating status early warning module, and a gate valve life status assessment module. This invention achieves precise closed-loop control of the gate valve opening by monitoring key hydraulic oil parameters, adapting the oil flow rate, and dynamically compensating for hydraulic pressure. Simultaneously, it comprehensively monitors the gate valve's operating status and provides early warnings of anomalies. Furthermore, it can quantify the gate valve's performance and determine its service level. This effectively solves the problems of low control accuracy, insufficient fault early warning, and lack of life assessment in traditional systems, significantly improving the control accuracy of large hydraulic gate valves and the safety and stability of gas station operations, while reducing the failure rate and the difficulty of operation monitoring.

Description

Technical Field

[0001] This invention relates to the field of gas station control technology, specifically a gas station control system and method for a large hydraulic gate valve. Background Technology

[0002] As key equipment in the core operations of oil stations, such as oil transportation, unloading, and storage, large hydraulic gate valves are crucial for ensuring the continuous and stable operation of oil stations. Their control accuracy and operational stability directly affect the efficiency of oil station operations, the safety of oil transportation, and the service life of the equipment. With the expansion of oil station operations and the diversification of operational scenarios, higher requirements are placed on the precise control, fault prediction, and full life cycle management of hydraulic gate valves.

[0003] Currently, the oil station control technology for large hydraulic gate valves generally adopts a single parameter monitoring and fixed logic adjustment mode, lacking the ability to coordinate and dynamically adapt to multiple influencing factors. This makes it difficult to meet the refined control requirements of complex operating environments, and the following technical defects exist in practical applications: First, real-time dynamic monitoring of hydraulic oil quality is generally not carried out, and the impact of changes in key parameters such as oil viscosity, impurity content, and moisture content on hydraulic system pressure transmission and gate valve operation is ignored. This makes it easy for gate valve jamming and hydraulic leakage to occur when the oil quality deteriorates. Furthermore, it cannot provide accurate data support for pressure regulation. The coordinated control mechanism of flow rate and gate valve opening is imperfect. It can only make simple opening adjustments based on the preset flow range, which is difficult to dynamically adapt to the changes in flow demand of different operating modes, resulting in fluctuations in oil delivery efficiency and increased pipeline impact. Secondly, the lack of dynamic compensation mechanisms for fluctuations in oil quality and ambient temperature in hydraulic pressure control directly affects the accuracy of gate valve opening control. Furthermore, it is difficult to predict potential faults in advance, and often only responds passively after a fault occurs. In addition, the lack of a quantitative assessment mechanism for the service status of large hydraulic gate valves makes it impossible to accurately determine the degree of performance degradation of the gate valve, which can easily lead to unplanned downtime or excessive maintenance, resulting in high operation and maintenance costs and operational risks.

[0004] Therefore, developing a large-scale hydraulic gate valve oil station control system capable of achieving coordinated adaptation of flow rate and opening degree, dynamic compensation of hydraulic pressure, and quantitative assessment of gate valve life has become an urgent technical problem to be solved in the current oil station control field. Summary of the Invention

[0005] The purpose of this invention is to provide a control system and method for a large hydraulic gate valve in an oil station, so as to solve the technical defects mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic oil quality dynamic monitoring module, an oil station flow rate coordination and adaptation module, an oil station hydraulic pressure compensation module, a gate valve opening closed-loop control module, and a gate valve operating status early warning module. The hydraulic oil quality dynamic monitoring module collects key characteristic parameters of hydraulic oil in the hydraulic system of the oil station in real time, performs dynamic analysis and evaluation of oil quality status, and determines whether the oil quality meets the requirements of gate valve control; the oil station flow coordination and adaptation module collects flow data of oil pipeline in real time, analyzes flow change trends, and outputs flow adaptation signals and real-time flow data in combination with the operation requirements of the oil station. The gas station hydraulic pressure compensation module dynamically compensates the working pressure of the hydraulic system by calculating the hydraulic pressure compensation amount; the gate valve opening closed-loop control module calculates the target opening of the gate valve and outputs a precise control signal to the gate valve actuator; the gate valve operation status early warning module comprehensively monitors and analyzes the operation status of large hydraulic gate valves and feeds back the gate valve operation status early warning signal to the gas station control terminal.

[0007] Furthermore, the hydraulic oil quality dynamic monitoring module uses integrated oil quality sensors to collect three key parameters in real time: viscosity, impurity content, and moisture content of hydraulic oil in the hydraulic oil tank and oil pipeline. The collected raw data is processed by signal filtering, and then the processed effective data is compared and analyzed with preset oil quality standard parameters to evaluate the current oil quality status, generate an oil quality analysis report, and clearly indicate whether the oil quality meets the standards, the deviation value of each parameter, and the trend of change. When a parameter is detected to be outside the standard range, an oil quality abnormality warning signal is generated and transmitted synchronously to the gate valve operation status warning module; at the same time, real-time oil quality data is transmitted to the oil station hydraulic pressure compensation module.

[0008] Furthermore, the gas station flow coordination and adaptation module collects real-time oil flow data from the gas station's oil pipeline through an integrated electromagnetic flow meter, and simultaneously receives the current operating mode and corresponding flow demand parameters transmitted from the gas station control terminal; it compares and analyzes the real-time flow data with the preset flow range in the current operating mode to determine whether the current flow meets the operating requirements, and analyzes the flow change trend to generate flow adaptation analysis results. When the real-time flow exceeds the preset range, a flow adaptation signal is generated based on the flow change trend and transmitted to the gate valve opening closed-loop control module to guide the opening control module to adjust the gate valve opening; at the same time, the real-time flow data is synchronously transmitted to the gate valve opening closed-loop control module.

[0009] Furthermore, the analysis process of the gas station hydraulic pressure compensation module dynamically compensating for the working pressure of the hydraulic system is as follows: The system receives real-time hydraulic oil viscosity data from the hydraulic oil quality dynamic monitoring module, ambient temperature data from the ambient temperature sensor, and real-time hydraulic system working pressure data from the hydraulic pressure sensor. It synchronously receives and analyzes these three types of data. Based on the principles of fluid statics and the influence of oil viscosity and temperature on pressure, it calculates the required pressure compensation amount using a preset pressure compensation formula. After calculating the hydraulic pressure compensation amount ΔP, the hydraulic pressure compensation amount ΔP is superimposed with the real-time working pressure to obtain the compensated target working pressure. Then, a pressure regulation signal is generated and transmitted to the proportional pressure regulating valve of the hydraulic pump station. The opening of the pressure regulating valve is adjusted to change the output oil pressure of the hydraulic pump station, so that the actual working pressure of the hydraulic system is stabilized within the target working pressure range. At the same time, the compensated hydraulic pressure data is continuously transmitted to the gate valve opening closed-loop control module.

[0010] Furthermore, the specific process by which the gate valve opening closed-loop control module calculates the target gate valve opening is as follows: After receiving the compensated hydraulic pressure data transmitted by the oil station hydraulic pressure compensation module and the flow data transmitted by the oil station flow coordination and adaptation module, it officially enters the control operation state. First, it completes the initialization settings, presets the gate valve reference opening parameters and adjustment response thresholds, and then receives the compensated hydraulic pressure data and flow data in real time. At the same time, it collects the current actual opening data of the large hydraulic gate valve through the integrated gate valve displacement sensor, performs real-time analysis and synchronous calibration of the three types of data, and calculates the target opening value required by the large hydraulic gate valve based on the analyzed effective data and the preset target opening calculation formula. After calculating the target opening degree Kt of the gate valve, it is compared with the current actual opening degree value. When the difference exceeds the preset response threshold, a corresponding opening degree adjustment signal is generated. The adjustment signal is amplified and transmitted to the gate valve hydraulic actuator to drive the gate valve to adjust the opening degree. Furthermore, during the gate valve adjustment process, the gate valve displacement sensor continuously collects real-time opening data, continuously calculates the opening difference, and dynamically corrects the adjustment signal until the difference between the actual opening and the target opening is within the preset threshold range, at which point the adjustment stops and the current opening is maintained.

[0011] Furthermore, the gate valve operation status early warning module establishes a multi-parameter early warning model, presets safety thresholds for various operating parameters, and receives in real time the opening adjustment data transmitted by the gate valve opening closed-loop control module, the oil quality abnormality early warning signal transmitted by the hydraulic oil quality dynamic monitoring module, and the pressure data transmitted by the oil station hydraulic pressure compensation module. It also collects gate valve operating noise data and gate valve vibration data through integrated noise and vibration sensors. The system integrates and analyzes various data in real time to determine whether each parameter exceeds the preset safety threshold. It also analyzes the changing trends of each parameter to predict potential faults. When a parameter is detected to exceed the safety threshold or a potential fault is detected, a gate valve operation status warning signal is generated and transmitted synchronously to the oil station control terminal.

[0012] Furthermore, the gate valve operation status early warning module is connected to the gate valve life status assessment module. When the gate valve operation status early warning signal is not received, the gate valve life status assessment module makes a comprehensive judgment on the performance of the large hydraulic gate valve, assesses whether the current performance of the gate valve meets the design qualification standard, and outputs the gate valve life status assessment result.

[0013] Furthermore, the evaluation process for whether the current performance of large hydraulic gate valves meets the design qualification standards is as follows: First, import the gate valve's factory design reference parameters. At the end of the evaluation period, collect the deviation value of the gate valve opening after each adjustment and the hysteresis time of the adjustment action. Calculate the steady-state influence value δk of the opening by averaging the deviation values ​​of all gate valve openings within the evaluation period, and mark the average value of the hysteresis time of all adjustment actions within the evaluation period as the hysteresis characteristic value th. In addition, the total duration tq of large hydraulic gate valves exceeding oil quality standards and the cumulative number of historical abnormal operating conditions Ne were collected. By substituting the collected data into the gate valve performance qualification calculation formula, the gate valve performance qualification H was obtained. After calculating the gate valve performance qualification H, the gate valve qualification is judged according to the preset standard, and the gate valve life status assessment results, which include the gate valve performance qualification H, the judgment conclusion and the main deterioration causes, are pushed to the oil station control terminal.

[0014] Furthermore, the specific judgment strategy for the qualification assessment of gate valves is as follows: When H≥0.85, the performance of the large hydraulic gate valve is deemed qualified and it can continue to be used normally. When 0.70≤H<0.85, the performance of the large hydraulic gate valve is judged to be slightly degraded, and attention to maintenance is recommended. When 0.60≤H<0.70, the performance of the large hydraulic gate valve is judged to be moderately degraded, and it needs to be repaired within a time limit. When H < 0.60, the large hydraulic gate valve is deemed to be unqualified in terms of performance and does not meet the requirements for safe service.

[0015] The present invention also proposes a method for controlling a large hydraulic gate valve in an oil station, comprising the following steps: Step 1: System power-on initialization; Step 2: Real-time oil quality monitoring; Step 3: Flow rate coordination and adaptation; Step 4: Hydraulic pressure compensation; Step 5: Gate valve opening control; Step 6: Operating condition early warning; Step 7: Life status assessment; Step 8: Continuous cyclic operation.

[0016] The beneficial effects of this invention are as follows: In this invention, multi-module collaboration enables real-time monitoring and early warning of hydraulic oil quality, adaptive control of oil flow and gate valve opening, dynamic compensation and stabilization of hydraulic pressure, and closed-loop precise adjustment of gate valve opening. At the same time, it monitors the gate valve operating status from multiple dimensions and provides early warning of potential faults, significantly improving the gate valve control accuracy and the stability of oil station operations, increasing oil delivery efficiency, reducing energy consumption and pipeline impact, lowering equipment failure rate, and helping to ensure the safety and continuity of oil station operations.

[0017] In this invention, the gate valve life status assessment module enables quantitative analysis of gate valve performance and service level classification, accurately assesses the performance degradation status of the gate valve throughout its entire life cycle and predicts its service life, providing accurate data support for planned maintenance and replacement of equipment, effectively avoiding unplanned downtime and excessive maintenance, further improving the economy and management level of gas station equipment operation and maintenance, and ensuring the safe and stable operation of equipment. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings; Figure 1 This is a schematic diagram of the system structure of the present invention; Figure 2 This is a schematic diagram of the method flow of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Refer to Figure 1 As shown, the present invention proposes a hydraulic control system for a large hydraulic gate valve, which includes a hydraulic oil quality dynamic monitoring module, a gas station flow rate coordination and adaptation module, a gas station hydraulic pressure compensation module, a gate valve opening closed-loop control module, and a gate valve operating status early warning module. The hydraulic oil quality dynamic monitoring module collects key characteristic parameters of hydraulic oil in the hydraulic system of the oil station in real time, performs dynamic analysis and evaluation of oil quality status, determines whether the oil quality meets the gate valve control requirements, realizes real-time dynamic monitoring of hydraulic oil quality, detects oil quality deterioration trends in advance, avoids hydraulic system leakage, gate valve jamming and other failures caused by deteriorating oil quality, reduces the failure rate, and simultaneously transmits oil quality analysis data to the hydraulic pressure compensation module of the oil station to provide basic data support for pressure compensation, ensure the rationality and accuracy of pressure compensation, and indirectly improve the gate valve control precision. Specifically, the hydraulic oil quality dynamic monitoring module uses integrated oil quality sensors (including viscosity sensor, impurity content sensor, moisture content sensor, etc.) to collect three key parameters of hydraulic oil in the hydraulic oil tank and oil pipeline in real time: viscosity, impurity content, and moisture content. Preferably, the collection frequency is set to once every 10 seconds to ensure the real-time nature of the data. The collected raw data first undergoes signal filtering to remove abnormal data caused by ambient temperature and electromagnetic interference. Then, the processed valid data is compared with preset oil quality standard parameters (preset according to the hydraulic oil type used at the gas station, for example, the standard viscosity of No. 46 anti-wear hydraulic oil is 41.4~50.6 mm at 40℃). 2 The oil quality is compared and analyzed with impurities ≤0.01% and moisture content ≤0.1% to assess the current oil quality status, generate an oil quality analysis report, and clearly indicate whether the oil quality meets the standards, the deviation values ​​of each parameter and the trend of change; When a parameter is detected to be outside the standard range, an oil quality abnormality warning signal is generated and transmitted synchronously to the gate valve operation status warning module; at the same time, real-time oil quality data is transmitted to the oil station hydraulic pressure compensation module to provide accurate data support for pressure compensation calculation; if all oil quality parameters are within the standard range, data is continuously collected and analyzed to maintain normal data transmission and ensure that the hydraulic system oil quality is under real-time monitoring.

[0021] The gas station flow coordination and adaptation module collects flow data from the gas station's oil pipeline in real time, analyzes flow change trends, and outputs flow adaptation signals and real-time flow data in conjunction with the gas station's operational needs (such as unloading, transporting, and storing oil). This enables coordinated adaptation between the gate valve opening and the oil flow, stabilizing the oil flow within a preset range, improving transport efficiency, reducing pipeline impact and energy waste, and solving the problems of poor flow and opening coordination and low transport efficiency in existing technologies. Furthermore, it adapts flow to different gas station operating modes, enhancing the system's applicability and flexibility. Specifically, the gas station flow coordination and adaptation module collects real-time oil flow data of the gas station's oil pipeline through an integrated electromagnetic flow meter, preferably every 5 seconds; at the same time, it receives the current operation mode (unloading, oil transportation, oil storage) and corresponding flow requirement parameters transmitted from the gas station control terminal; it compares and analyzes the real-time flow data with the preset flow range in the current operation mode to determine whether the current flow meets the operation requirements, and analyzes the flow change trend (such as continuous increase, continuous decrease, or stable fluctuation) to generate flow adaptation analysis results; When the real-time flow exceeds the preset range, a flow adaptation signal is generated based on the flow change trend and transmitted to the gate valve opening closed-loop control module. This signal guides the gate valve opening closed-loop control module to adjust the gate valve opening, ensuring that the oil flow is stabilized within the preset range. For example, during oil unloading operations, if the real-time flow is too high, the adaptation signal is output to guide the gate valve opening closed-loop control module to reduce the gate valve opening and decrease the flow, preventing pipeline impact caused by excessively rapid oil unloading. During oil transportation operations, if the real-time flow is too low, the adaptation signal is output to guide the gate valve opening closed-loop control module to increase the gate valve opening and increase the flow, ensuring oil transportation efficiency. Simultaneously, real-time flow data is transmitted to the gate valve opening closed-loop control module to provide data support for target opening calculation, realize coordinated control of flow and opening, ensure efficient and stable oil transportation operations at the gas station, avoid safety hazards such as excessive pipeline pressure and leakage caused by mismatch between flow and opening, and ensure the safety of oil transportation operations at the gas station.

[0022] The gas station's hydraulic pressure compensation module dynamically compensates for the hydraulic system's working pressure by calculating the compensation amount. This effectively counteracts the effects of oil quality changes and ambient temperature fluctuations on hydraulic pressure, ensuring that the hydraulic pressure remains stable within a preset range. It avoids pressure deviations caused by oil quality changes and temperature fluctuations, providing stable pressure assurance for subsequent gate valve opening control. This prevents opening adjustment errors caused by pressure fluctuations, further improving gate valve control accuracy. Furthermore, it reduces the energy consumption of the hydraulic pump station. When oil viscosity decreases, reasonable pressure compensation prevents excessive pressure output from the pump station, thus reducing energy waste and lowering gas station operating costs. The specific analysis process is as follows: Upon receiving oil quality data from the hydraulic oil quality dynamic monitoring module, the system immediately activates, receiving real-time hydraulic oil viscosity data from the module, ambient temperature data from the ambient temperature sensor, and real-time hydraulic system operating pressure data from the hydraulic pressure sensor. It synchronously receives and analyzes these three types of data to ensure data synchronization and validity. Based on the principles of fluid statics and the influence of oil viscosity and temperature on pressure, it calculates the required pressure compensation using a preset pressure compensation formula, as follows: ; Wherein, ΔP: hydraulic pressure compensation amount, which is the value that needs to compensate the real-time working pressure of the hydraulic system. It can be positive or negative (positive value indicates that the pressure needs to be increased, and negative value indicates that the pressure needs to be decreased), and is calculated by this formula; k: Pressure compensation coefficient, preset according to the hydraulic oil type and obtained through experimental calibration; for example, the compensation coefficient k of No. 46 anti-wear hydraulic oil can be calibrated as 0.005 MPa・s / mm. 2 ; ηa: Real-time viscosity of hydraulic oil, which is collected in real time by the hydraulic oil quality dynamic monitoring module through the integrated viscosity sensor. The collection location is at the outlet of the hydraulic oil tank. ηr: Rated viscosity of hydraulic oil, determined according to the hydraulic oil type, and is a preset fixed value, entered by the engineer during system initialization; for example, the rated viscosity of No. 46 anti-wear hydraulic oil at 40℃ is 45 mm. 2 / s; α: Temperature influence coefficient, determined by the thermal expansion characteristics of hydraulic oil, is a preset fixed value, obtained by engineers in conjunction with hydraulic oil parameters, for example, α=0.0021 / ℃; Ta: Real-time ambient temperature, which is collected in real time by an ambient temperature sensor integrated near the hydraulic pump station; Tr: Rated operating temperature of the hydraulic system. It is a fixed value preset according to the working environment of the oil station and is entered by the engineer during system initialization, for example, 25℃.

[0023] Furthermore, after calculating the hydraulic pressure compensation amount ΔP, the hydraulic pressure compensation amount ΔP is superimposed with the real-time working pressure to obtain the compensated target working pressure. Then, a pressure regulation signal is generated and transmitted to the proportional pressure regulating valve of the hydraulic pump station. The opening of the pressure regulating valve is adjusted to change the output oil pressure of the hydraulic pump station, so that the actual working pressure of the hydraulic system is stabilized within the target working pressure range. Meanwhile, the compensated hydraulic pressure data is continuously transmitted to the gate valve opening closed-loop control module to provide data support for gate valve opening adjustment, forming a coordinated control of pressure compensation and opening adjustment.

[0024] The gate valve opening closed-loop control module calculates the target gate valve opening and outputs a precise control signal to the gate valve actuator, ensuring that the gate valve opening accurately matches the oil station's oil delivery demand. This effectively avoids problems such as oil pressure fluctuations and unstable flow caused by opening deviations. The specific process is as follows: After receiving the compensated hydraulic pressure data transmitted by the oil station hydraulic pressure compensation module and the flow data transmitted by the oil station flow coordination and adaptation module, it officially enters the control operation state, first completing the initialization settings, and preset the gate valve reference opening parameters and adjustment response threshold. Subsequently, the compensated hydraulic pressure and flow data are received in real time. Simultaneously, the actual opening degree data of the large hydraulic gate valve is collected via an integrated gate valve displacement sensor. These three types of data are analyzed and synchronously calibrated in real time, eliminating minor interference signals during data transmission. Based on the analyzed valid data, the target opening degree value required for the large hydraulic gate valve is calculated using a preset target opening degree calculation formula. The target opening degree calculation formula is as follows: ; Wherein, Kt: the target opening degree of the gate valve, that is, the opening degree value that the gate valve needs to be adjusted to, ranging from 0 to 100% (0% is fully closed, 100% is fully open), which is calculated by this formula; Kb: The reference opening degree of the gate valve is preset according to the specifications of the oil pipeline of the oil station and the gate valve model. It is obtained by the engineer in combination with the equipment parameters. For example, the reference opening degree of the DN500 hydraulic gate valve can be calibrated to 50%. Pc: The compensated hydraulic system working pressure is calculated by the oil station hydraulic pressure compensation module. It is the actual working pressure after compensation for oil quality and temperature, and is obtained through data transmission between modules. Pr: Rated working pressure of the hydraulic system, determined according to the design parameters of the hydraulic pump station of the oil station. It is a preset fixed value, which is entered by the engineer during system initialization, for example, 3.5MPa; Qa: The real-time oil flow rate of the gas station is obtained in real time by the gas station flow coordination and adaptation module through the integrated electromagnetic flow meter; Qr: Rated oil flow rate of the gas station, determined based on the design capacity of the gas station's oil pipeline. It is a preset fixed value, entered by the engineer during system initialization, for example, 50m³ / h. 3 / h.

[0025] Furthermore, after calculating the target opening degree Kt of the gate valve, it is compared with the current actual opening degree value. When the difference exceeds the preset response threshold, a corresponding opening degree adjustment signal is generated. The adjustment signal is amplified and transmitted to the gate valve hydraulic actuator to drive the gate valve to adjust the opening degree. Furthermore, during the gate valve adjustment process, the gate valve displacement sensor continuously collects real-time opening data, continuously calculates the opening difference, and dynamically corrects the adjustment signal until the difference between the actual opening and the target opening is within the preset threshold range. Then, the adjustment stops and the current opening is maintained, completing one closed-loop control cycle. The above process is repeated continuously to achieve real-time dynamic closed-loop control of the gate valve opening.

[0026] The gate valve operation status early warning module comprehensively monitors and analyzes the operation status of large hydraulic gate valves, and feeds back the gate valve operation status early warning signal to the oil station control terminal. This enables comprehensive monitoring of the operation status of the gate valve and hydraulic system, early prediction of potential faults, reduction of downtime due to faults, improvement of oil station operation continuity, protection of oil station operation safety, and improvement of oil station equipment management level. Specifically, the gate valve operation status early warning module establishes a multi-parameter early warning model, presets safety thresholds for various operating parameters (including gate valve opening adjustment deviation threshold, hydraulic pressure fluctuation threshold, oil quality parameter threshold, gate valve operation noise threshold, etc.), and then receives in real time the opening adjustment data transmitted by the gate valve opening closed-loop control module, the oil quality abnormality early warning signal transmitted by the hydraulic oil quality dynamic monitoring module, and the pressure data transmitted by the oil station hydraulic pressure compensation module. In addition, it collects gate valve operation noise data and gate valve vibration data through integrated noise and vibration sensors. Real-time integration and analysis of various data to determine whether each parameter exceeds the preset safety threshold. At the same time, analysis of the changing trend of each parameter to predict potential fault hazards (such as the gate valve jamming due to a continuous increase in the opening adjustment deviation, and the hydraulic leakage due to frequent fluctuations in hydraulic pressure). When parameters are detected to exceed safety thresholds or potential faults are detected, a gate valve operation status warning signal is generated and transmitted synchronously to the gas station control terminal, alerting staff through audible and visual alarms, SMS notifications, and other means. Furthermore, if all parameters are within safe limits, the data of each module is continuously monitored to maintain normal operation.

[0027] Furthermore, the gate valve operation status warning signals can be graded, generating graded warning signals based on the severity of the fault. For example, Level 1 warning: minor abnormality, not affecting normal operation, reminding for regular inspection; Level 2 warning: moderate abnormality, which may affect control accuracy, reminding for timely troubleshooting; Level 3 warning: severe abnormality, which may lead to equipment failure, immediately triggering a shutdown signal.

[0028] Example 2: Refer to Figure 1 As shown, the difference between this embodiment and Embodiment 1 is that the gate valve operation status early warning module is communicatively connected to the gate valve life status assessment module. When the gate valve operation status early warning signal is not received, the gate valve life status assessment module comprehensively judges the performance of the large hydraulic gate valve, assesses whether the current performance of the gate valve meets the design qualification standards, and outputs the gate valve life status assessment results. This achieves quantitative assessment of the performance degradation of the gate valve throughout its entire life cycle, distinguishes between real-time operating condition early warning and long-term life warning, accurately predicts the service life of the gate valve, provides data support for planned maintenance and replacement of equipment, and effectively avoids unplanned downtime and excessive maintenance, improving the economic efficiency of gas station operation and maintenance and the safety of equipment operation. The specific assessment process is as follows: First, import the gate valve's factory design reference parameters. At the end of the evaluation period, collect the deviation value of the gate valve opening after each adjustment and the hysteresis time of the adjustment action. Calculate the steady-state influence value δk of the opening by averaging the deviation values ​​of all gate valve openings within the evaluation period, and mark the average value of the hysteresis time of all adjustment actions within the evaluation period as the hysteresis characteristic value th. In addition, the total duration (tq) of large hydraulic gate valves exceeding oil quality standards and the cumulative number of historical abnormal operating conditions (Ne) were collected. By substituting the collected data into the gate valve performance qualification calculation formula, the gate valve performance qualification H was obtained. The formula is as follows: ; Where H: gate valve performance qualification, the value is limited to the range of [0,1]. The closer the value is to 1, the more qualified the gate valve is. It is calculated by this formula. λ1, λ2, λ3, λ4: Weighting coefficients for degradation indicators, based on the gate valve structure design and gas station operating condition calibration, satisfying λ1+λ2+λ3+λ4=1; for example, the conventional calibration values ​​are λ1=0.3, λ2=0.3, λ3=0.2, λ4=0.2, which are preset and entered during system initialization; δk: Steady-state influence value of aperture; δkmax: The maximum allowable value of the steady-state influence of the valve opening, which is the qualified threshold set by the factory for the gate valve, and is a preset fixed parameter; th: Characteristic value of hysteresis; thmax: Maximum allowed duration of motion lag, a preset fixed parameter; tq: Total duration of oil quality indicators exceeding the standard, which is the total duration of adverse indicators such as impurities and moisture in hydraulic oil exceeding the standard in the historical period, and is obtained by the hydraulic oil quality dynamic monitoring module through cumulative statistics. tqmax: Maximum allowable corrosion time for oil exceeding the standard, a preset fixed parameter set based on the corrosion resistance performance of the gate valve sealing material; Ne: Cumulative number of historical abnormal operating conditions, which is the total number of times the gate valve operates abnormally and the warning is triggered in the historical period. It is obtained by the gate valve operation status warning module. Nemax: Maximum allowed cumulative number of abnormal operating conditions. This is the number of abnormal conditions allowed throughout the entire life cycle of a large hydraulic gate valve, and is a preset fixed parameter.

[0029] Furthermore, after calculating the gate valve performance qualification degree H, the gate valve qualification judgment is performed according to the preset standard, as follows: When H≥0.85, the performance of the large hydraulic gate valve is deemed qualified and it can continue to be used normally. When 0.70≤H<0.85, the performance of the large hydraulic gate valve is judged to be slightly degraded, and attention to maintenance is recommended. When 0.60≤H<0.70, the performance of the large hydraulic gate valve is judged to be moderately degraded, and it needs to be repaired within a time limit. When H < 0.60, the large hydraulic gate valve is deemed to be unqualified in terms of performance and does not meet the requirements for safe service. Furthermore, the gate valve life status assessment results, including the gate valve performance qualification H, judgment conclusion, and main deterioration causes, are pushed to the gas station control terminal, which facilitates managers to quickly and reasonably take corresponding measures, ensure the safety of gas station operation, and significantly reduce the difficulty of monitoring.

[0030] Example 3: Refer to Figure 2 As shown, the difference between this embodiment and Embodiments 1 and 2 is that the present invention also proposes a method for controlling a large hydraulic gate valve in an oil station, including the following steps: Step 1: System power-on initialization: The system is powered on and completes overall initialization, importing the factory reference parameters of the gate valve and hydraulic system, including the rated pressure and temperature of the hydraulic system, the reference opening of the gate valve, the rated oil flow rate, the standard threshold of oil quality, and various weighting coefficients and compensation coefficients. Step 2: Real-time oil quality monitoring: The hydraulic oil quality dynamic monitoring module collects hydraulic oil viscosity, impurity content, and moisture content parameters in real time. After filtering, it compares and analyzes the data with preset standard values ​​and transmits the real-time viscosity data to the oil station hydraulic pressure compensation module. If the oil quality exceeds the standard, it simultaneously sends an oil quality abnormality signal to the gate valve operation status early warning module. Step 3: Traffic Coordination and Adaptation The gas station flow coordination and adaptation module synchronously collects real-time flow data of the oil pipeline, combines the operating mode issued by the control terminal with the preset flow range to perform trend analysis, and generates a flow adaptation signal. Step 4: Hydraulic pressure compensation: The oil station hydraulic pressure compensation module receives oil viscosity, ambient temperature and system original pressure data, calculates the pressure compensation amount through the pressure compensation formula, superimposes the compensation amount with the original pressure to obtain the target working pressure, and outputs the adjustment signal to the hydraulic pump station proportional pressure regulating valve to stabilize the system pressure. Step 5: Gate valve opening adjustment: The gate valve opening closed-loop control module receives the compensated pressure, real-time flow and actual gate valve opening data, calculates the target gate valve opening using the target opening formula, compares the difference between the actual opening and the target opening, and if the difference exceeds the threshold, it outputs an adjustment signal to the gate valve hydraulic actuator to adjust the opening, and continuously receives opening feedback signals to form closed-loop control. Step Six: Operating Condition Early Warning The gate valve operation status early warning module collects opening adjustment data, pressure fluctuation data, oil quality status, gate valve vibration and noise data throughout the process, determines whether each parameter exceeds the safety threshold, and uploads the gate valve operation status early warning signal to the oil station control terminal when it generates a gate valve operation status early warning signal. Step 7: Vital Status Assessment The gate valve life status assessment and early warning module calculates the pass rate value according to the gate valve performance pass rate weighted formula at a preset fixed period, and determines the gate valve performance level based on the pass rate range. Step 8: Continuously run in a loop: The system continuously cycles through oil quality monitoring, flow rate adaptation, pressure compensation, opening degree control, and operating condition early warning steps to maintain real-time control functions. It also automatically completes gate valve life assessments periodically until it receives a system shutdown command and terminates operation.

[0031] The working principle of this invention is as follows: During use, the hydraulic oil quality dynamic monitoring module collects key hydraulic oil parameters and provides early warnings; the oil station flow rate coordination and adaptation module collects the oil flow rate and outputs adaptation signals based on operational requirements; the oil station hydraulic pressure compensation module dynamically calculates the compensation amount based on oil quality and temperature to stabilize the working pressure of the hydraulic system; the gate valve opening closed-loop control module accurately adjusts the gate valve opening based on pressure and flow data; the gate valve operation status early warning module monitors and provides early warnings of gate valve faults from multiple dimensions; and the gate valve life status assessment module quantitatively calculates the gate valve performance qualification and classifies its service status. This effectively solves the problems of low gate valve adjustment accuracy, poor coordination between flow and opening, pressure being easily affected by oil quality and temperature, insufficient fault early warning, and lack of quantitative assessment of gate valve life in traditional control systems. It significantly improves the gate valve control accuracy and oil station operation stability, increases oil delivery efficiency and reduces energy consumption, predicts faults in advance to reduce the incidence rate, and provides accurate data support for equipment operation and maintenance, avoiding unplanned downtime and excessive maintenance, thereby improving the economic efficiency of oil station operation and maintenance and the level of equipment management.

[0032] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, enabling those skilled in the art to better understand and utilize it. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A control system for a large hydraulic gate valve in an oil station, characterized in that, It includes a hydraulic oil quality dynamic monitoring module, an oil station flow rate coordination and adaptation module, an oil station hydraulic pressure compensation module, a gate valve opening closed-loop control module, and a gate valve operating status early warning module. The hydraulic oil quality dynamic monitoring module collects key characteristic parameters of hydraulic oil in the hydraulic system of the oil station in real time to determine whether the oil quality meets the requirements of gate valve control; the oil station flow coordination and adaptation module collects flow data of oil pipeline in real time, analyzes flow change trends, and outputs flow adaptation signals and real-time flow data in combination with the operation requirements of the oil station. The gas station hydraulic pressure compensation module dynamically compensates the working pressure of the hydraulic system by calculating the hydraulic pressure compensation amount. The gate valve opening closed-loop control module calculates the target opening of the gate valve and outputs a precise control signal to the gate valve actuator. The gate valve operation status early warning module comprehensively monitors and analyzes the operation status of large hydraulic gate valves, and feeds back the gate valve operation status early warning signal to the oil station control terminal.

2. The oil station control system for a large hydraulic gate valve according to claim 1, characterized in that, The hydraulic oil quality dynamic monitoring module collects three key parameters in real time: viscosity, impurity content, and moisture content of hydraulic oil in the hydraulic oil tank and oil pipeline. The collected raw data is processed by signal filtering, and then the processed effective data is compared and analyzed with the preset oil quality standard parameters to generate an oil quality analysis report. When a parameter is detected to be outside the standard range, an oil quality abnormality warning signal is generated and transmitted synchronously to the gate valve operation status warning module; at the same time, real-time oil quality data is transmitted to the oil station hydraulic pressure compensation module.

3. The oil station control system for a large hydraulic gate valve according to claim 1, characterized in that, The gas station flow coordination and adaptation module compares and analyzes real-time flow data with the preset flow range in the current operation mode to determine whether the current flow meets the operation requirements. At the same time, it analyzes the flow change trend and generates flow adaptation analysis results. When the real-time flow exceeds the preset range, a flow adaptation signal is generated based on the flow change trend and transmitted to the gate valve opening closed-loop control module to guide the opening control module to adjust the gate valve opening. At the same time, real-time flow data is synchronously transmitted to the gate valve opening closed-loop control module.

4. The oil station control system for a large hydraulic gate valve according to claim 3, characterized in that, The analysis process of the hydraulic pressure compensation module of the gas station dynamically compensating for the working pressure of the hydraulic system is as follows: Based on the principles of hydrostatics and the influence of oil viscosity and temperature on pressure, the required pressure compensation amount is calculated using a preset pressure compensation formula. After calculating the hydraulic pressure compensation amount ΔP, it is superimposed with the real-time working pressure to obtain the compensated target working pressure. Subsequently, a pressure regulation signal is generated and transmitted to the proportional pressure regulating valve of the hydraulic pump station. The opening of the pressure regulating valve is adjusted to change the output oil pressure of the hydraulic pump station, so that the actual working pressure of the hydraulic system is stabilized within the target working pressure range. At the same time, the compensated hydraulic pressure data is continuously transmitted to the gate valve opening closed-loop control module.

5. The oil station control system for a large hydraulic gate valve according to claim 4, characterized in that, The specific process by which the gate valve opening closed-loop control module calculates the target gate valve opening is as follows: The target opening value required for the large hydraulic gate valve is obtained by performing calculations using a preset target opening formula. After calculating the target opening degree Kt of the gate valve, the difference between it and the current actual opening degree is compared. When the difference exceeds the preset response threshold, a corresponding opening degree adjustment signal is generated to drive the gate valve to adjust its opening degree. During the gate valve adjustment process, the adjustment signal is dynamically corrected until the difference between the actual opening degree and the target opening degree of the gate valve is within the preset threshold range.

6. The oil station control system for a large hydraulic gate valve according to claim 1, characterized in that, The gate valve operation status early warning module integrates and analyzes various data in real time to determine whether each parameter exceeds the preset safety threshold. At the same time, it analyzes the changing trend of each parameter and predicts potential fault hazards. When a parameter is detected to exceed the safety threshold or a potential fault hazard exists, a gate valve operation status early warning signal is generated and transmitted synchronously to the oil station control terminal.

7. The oil station control system for a large hydraulic gate valve according to claim 6, characterized in that, The gate valve operation status early warning module is connected to the gate valve life status assessment module. When the gate valve operation status early warning signal is not received, the gate valve life status assessment module makes a comprehensive judgment on the performance of the large hydraulic gate valve, assesses whether the current performance of the gate valve meets the design qualification standard, and outputs the gate valve life status assessment result.

8. The oil station control system for a large hydraulic gate valve according to claim 7, characterized in that, The evaluation process for determining whether the current performance of a large hydraulic gate valve meets the design qualification standards is as follows: The collected data is analyzed and calculated by substituting it into the gate valve performance qualification formula to obtain the gate valve performance qualification H. After calculating the gate valve performance qualification H, the gate valve qualification is judged according to the preset standard, and the gate valve life status assessment result is pushed to the oil station control terminal.

9. A gas station control system for a large hydraulic gate valve according to claim 8, characterized in that, The specific strategy for determining the conformity of gate valves is as follows: When H≥0.85, the performance of the large hydraulic gate valve is deemed qualified and it can continue to be used normally. When 0.70≤H<0.85, the performance of the large hydraulic gate valve is judged to be slightly degraded, and attention to maintenance is recommended. When 0.60≤H<0.70, the performance of the large hydraulic gate valve is judged to be moderately degraded, and it needs to be repaired within a time limit. When H < 0.60, the large hydraulic gate valve is deemed to be unqualified in terms of performance and does not meet the requirements for safe service.

10. A method for controlling a large hydraulically controlled gate valve at an oil station, employing an oil station control system for a large hydraulically controlled gate valve as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: System power-on initialization; Step 2: Real-time oil quality monitoring; Step 3: Flow rate coordination and adaptation; Step 4: Hydraulic pressure compensation; Step 5: Gate valve opening control; Step 6: Operating condition early warning; Step 7: Life status assessment; Step 8: Continuous cyclic operation.

Images