Hydraulic control system and method based on gas-liquid linkage

Abstract

The invention relates to the technical field of hydraulic systems, in particular to a hydraulic control system and method based on gas-liquid linkage, and the system comprises a gas-liquid linkage module, a detection module, a data transmission module, an aging evaluation module and an analysis module, according to the aging score, a corresponding standard resistance value interval when the valve is opened or closed is divided into a plurality of standard subintervals; and the analysis module is used for training a valve resistance model, obtaining a standard resistance curve, comparing the standard resistance curve with the standard subintervals and judging whether the standard resistance curve is accurate or not, if yes, obtaining an abnormal resistance curve and judging whether operation of the valve meets a preset standard or not according to the abnormal resistance curve, and if yes, correcting hydraulic pressure. The gas pressure is stored through the gas storage tank, so that the valve is driven, the problem that in actual life, energy around the gas conveying pipeline is difficult to obtain is solved, and the deployment cost of supporting facilities after pipeline laying is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic systems, and particularly relates to a hydraulic control system and method based on gas-liquid linkage. BACKGROUND

[0002] In the pipeline transportation process of gas, the valve as the core equipment for controlling the on-off of the pipeline, the stability of its operation is directly related to the safety of the gas delivery pipeline. At present, the opening and closing of the valve on the pipeline is mostly driven by a gas-liquid linkage hydraulic control system.

[0003] However, in the use process of the existing gas-liquid linkage hydraulic control system, due to the influence of factors such as aging, sediment accumulation and rust of the valve in the use process, the resistance of the valve during opening and closing will gradually increase. The existing technology relies on fixed air pressure, hydraulic pressure or resistance threshold to determine the running state, and it is difficult to distinguish between the resistance increase caused by natural aging of the valve and the resistance increase caused by sediment accumulation and rust. The state judgment of the valve is not accurate, which can easily cause misjudgment or omission, and further lead to sluggish action of the valve or increase the maintenance cost.

[0004] Therefore, the existing technology has defects and needs to be improved. SUMMARY

[0005] The purpose of the present application is to provide a hydraulic control system and method based on gas-liquid linkage to solve the problem that the existing technology relies on fixed air pressure, hydraulic pressure or resistance threshold to determine the running state, and it is difficult to distinguish between the resistance increase caused by natural aging of the valve and the resistance increase caused by sediment accumulation and rust. The state judgment of the valve is not accurate, which can easily cause misjudgment or omission, and further lead to sluggish action of the valve or increase the maintenance cost.

[0006] The present application provides a hydraulic control system based on gas-liquid linkage, comprising:

[0007] A gas-liquid linkage module for using the gas pressure in the pipeline as a power source to control the opening or closing of the valve;

[0008] A detection module for detecting the operating parameters of the hydraulic control system during operation to generate historical data;

[0009] A data transmission module for transmitting the historical data;

[0010] An aging evaluation module for calculating an aging score according to the historical data, dividing the standard resistance value interval corresponding to the opening or closing of the valve into a plurality of standard subintervals according to the aging score, and calculating the current aging score of the valve and determining the corresponding standard subinterval according to the current aging score in response to the opening or closing of the valve;

[0011] The analysis module is configured to train a valve resistance model according to the historical data, acquire a standard resistance curve according to the valve resistance model in response to valve opening or closing, compare the standard resistance curve with the standard sub-interval, determine whether the standard resistance curve is accurate according to a comparison result, acquire a real-time resistance curve when the valve is opened or closed in response to the standard resistance curve being accurate, acquire an abnormal resistance curve according to the real-time resistance curve and the standard resistance curve, determine whether the operation of the valve meets a preset standard according to the abnormal resistance curve, and correct the hydraulic pressure of the gas-liquid linkage module when the valve is opened or closed next time according to the real-time resistance curve in response to the operation of the valve meeting the preset standard.

[0012] The historical data includes resistance-related parameters, valve type data, and state parameters.

[0013] The resistance-related parameters include the temperature and water dew point of the gas in the pipeline.

[0014] The valve type data includes the valve diameter and the sealing material.

[0015] The state parameters include the standard resistance curve when the valve is opened or closed, and the gas pressure in the pipeline.

[0016] As a preferred technical solution of the gas-liquid linkage-based hydraulic control system, the gas-liquid linkage module includes a gas-liquid linkage unit and a manual control unit.

[0017] The gas-liquid linkage unit includes a gas pressure source 1, a root manual valve 2, a one-way valve 3, a gas source filter 4, a gas storage tank 6, a control pressure total valve 9, a main pressure reducing valve 11, a pneumatic reversing valve 16, a gas-liquid conversion tank 18, a pneumatic acting valve 20, an actuator 22, and a gas-liquid linkage ball valve 26 connected in series through a pipeline.

[0018] The pneumatic reversing valve 16 is configured as two, respectively configured with a speed regulating valve 17 and a silencer 25, and a secondary pressure reducing valve 12, an open electromagnetic valve 13, a close electromagnetic valve 14, and an ESD electromagnetic valve 15 are connected between the two pneumatic reversing valves 16 through a pipeline.

[0019] A first blowdown valve 5 is further arranged on the gas source filter 4, a safety valve 7, an instrument valve 8, and a second blowdown valve 10 are arranged on the gas storage tank 6, and a third blowdown port 19 is arranged on the gas-liquid conversion tank 18.

[0020] The manual control unit includes a manual acting valve 21, a manual reversing valve 24, and a manual hydraulic device 23.

[0021] As the preferred technical scheme of the hydraulic control system based on the gas-liquid linkage, the manual control unit and the automatic control loop of the gas-liquid linkage module are interlocked through the pneumatic action valve 20 and the manual action valve 21, and the pneumatic action valve 20 is automatically cut off from the gas source in response to the opening of the manual action valve 21.

[0022] As the preferred technical scheme of the hydraulic control system based on the gas-liquid linkage, the valve opening or closing corresponding standard resistance value interval is divided into several standard subintervals according to the aging score, including:

[0023] For the single opening or closing of the valve in the historical data, the use time, use frequency and state parameters of the corresponding valve are obtained, and the use time, use frequency and gas pressure in the pipeline are respectively assigned weight values, and the sum of the products of the use time, use frequency and gas pressure in the pipeline and the weight values is calculated and recorded as the aging score;

[0024] The aging score corresponding to each opening or closing of the valve is obtained, and the aging score interval is obtained;

[0025] The aging score interval is divided into several sub-score intervals according to the preset step length;

[0026] The standard resistance curve corresponding to the aging score in each subinterval in the real-time historical data is obtained, the standard resistance value interval corresponding to each opening or closing of the valve is obtained according to the standard resistance curve, the union of the standard resistance value interval corresponding to each opening or closing is taken, and it is recorded as the standard subinterval.

[0027] As the preferred technical scheme of the hydraulic control system based on the gas-liquid linkage, the valve resistance model is trained according to the historical data, including:

[0028] The state parameters in the historical data are obtained to generate a training data set, and the historical data in the training data set also correspond to resistance-related parameters and valve type data of the hydraulic control system in the running process. The valve resistance model is generated by training according to the training data set. If the resistance-related parameters, valve type data and gas pressure in the pipeline are input, the standard resistance curve of the valve opening or closing is output.

[0029] As the preferred technical scheme of the hydraulic control system based on the gas-liquid linkage, the standard resistance curve is compared with the standard subinterval, and whether the standard resistance curve is accurate is determined according to the comparison result, including:

[0030] acquire the standard sub-interval, acquire the standard resistance curve according to the valve resistance model, compare the standard resistance curve with the standard sub-interval, determine whether the standard resistance curve is accurate according to the comparison result, and in response to the resistance values corresponding to the standard resistance curve being all within the standard sub-interval, determine that the standard resistance curve output by the valve resistance model is accurate;

[0031] in response to there being resistance values corresponding to the standard resistance curve outside the standard sub-interval, determine that the standard resistance curve output by the valve resistance model is inaccurate, and the analysis module automatically corrects the valve resistance model according to historical data.

[0032] As the preferred technical solution of the hydraulic control system based on gas-liquid linkage, in response to the standard resistance curve being accurate, the real-time resistance curve when the valve is opened or closed is acquired, and the abnormal resistance curve is acquired according to the real-time resistance curve and the standard resistance curve, comprising:

[0033] A plane rectangular coordinate system with the abscissa being the valve opening value and the ordinate being the resistance value is established;

[0034] In the plane rectangular coordinate system, the real-time resistance curve and the standard resistance curve are generated;

[0035] For a single valve opening value, the abnormal resistance value is obtained by subtracting the resistance value of the standard resistance curve from the resistance value of the real-time resistance curve, the abnormal resistance values corresponding to other valve opening values are calculated, and the abnormal resistance curve is determined according to the calculation result.

[0036] As the preferred technical solution of the hydraulic control system based on gas-liquid linkage, the operation of the valve is determined to meet the preset standard according to the abnormal resistance curve, and in response to the resistance values of the abnormal resistance curve being all less than the resistance threshold value, it is determined that the operation of the valve meets the preset standard;

[0037] in response to there being a point on the abnormal resistance curve with a resistance value greater than or equal to the resistance threshold value, it is determined that the operation of the valve does not meet the preset standard, and a maintenance notice is issued.

[0038] As the preferred technical solution of the hydraulic control system based on gas-liquid linkage, in the next valve opening or closing, the hydraulic pressure of the gas-liquid linkage module is corrected according to the real-time resistance curve, comprising:

[0039] The real-time resistance curve is acquired, and the correction amplitude is positively correlated with the maximum resistance value of the real-time resistance curve, that is, the greater the maximum resistance value of the real-time resistance curve, the greater the corrected hydraulic pressure.

[0040] The application also provides a hydraulic control method based on gas-liquid linkage, comprising:

[0041] The gas pressure in the pipeline is used as a power source to control the opening or closing of the valve.

[0042] Detecting the running parameters of the hydraulic control system during operation to generate historical data;

[0043] Transmitting the historical data;

[0044] According to the historical data, calculate the aging score, and according to the aging score, divide the corresponding standard resistance value interval when the valve is opened or closed into several standard subintervals, in response to the valve opening or closing, calculate the current aging score of the valve and determine the corresponding standard subinterval according to the current aging score;

[0045] According to the historical data, train the valve resistance model, in response to the valve opening or closing, obtain the standard resistance curve according to the valve resistance model, compare the standard resistance curve with the standard subinterval, and determine whether the standard resistance curve is accurate according to the comparison result, in response to the standard resistance curve being accurate, obtain the real-time resistance curve when the valve is opened or closed, obtain the abnormal resistance curve according to the real-time resistance curve and the standard resistance curve, and determine whether the operation of the valve meets the preset standard according to the abnormal resistance curve, in response to the operation of the valve meeting the preset standard, adjust the hydraulic pressure of the gas-liquid linkage module when the valve is opened or closed next time according to the real-time resistance curve.

[0046] Compared with the prior art, the beneficial effects of the present application are as follows: on the one hand, the present application stores gas pressure in the gas storage tank, and drives the valve to open or close by the gas stored in the gas storage tank when it is necessary to close the valve, solving the problem of difficulty in obtaining energy around the gas pipeline in actual life, and reducing the deployment cost of supporting facilities after pipeline laying. On the other hand, the present application calculates the aging score and divides the historical data according to the aging score to generate several standard subintervals, constructs a valve resistance model to obtain the standard resistance curve caused by normal aging of the valve, compares the resistance curve generated by the model with the standard subinterval to verify the output result of the model, thereby increasing the accuracy of the output result of the model. The real-time resistance curve during valve closing is obtained, and the abnormal resistance curve is determined according to the difference between the ordinate of the real-time resistance curve and the standard resistance curve, thereby determining whether the operation of the valve meets the preset standard according to the abnormal resistance curve. When the operating state of the valve meets the preset standard, the hydraulic pressure is adjusted according to the real-time resistance curve, thereby avoiding the increase of resistance of the valve during use, which causes the delay of valve action.

[0047] In detail, in addition to the main influence parameters contained in the historical data, the valve is also affected by other factors in the use process, the aging speed is slightly different, and different oxidation degrees can cause the same aging score but different standard resistance value curves, therefore, the aging score is calculated through the historical data, the union of the standard resistance value interval of the standard resistance curve corresponding to the aging score is selected, thereby the resistance value range of the valve in the normal aging process is obtained according to the aging score, and the aging degree of the valve is abnormal when the range is exceeded, thereby the result output by the valve resistance model can be verified according to the historical data, and the accuracy of the subsequent determination result is increased. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 A structural block diagram of a hydraulic control system based on gas-liquid linkage of an embodiment of the present application is shown in the figure;

[0049] Figure 2 A structural diagram of a gas-liquid linkage module of an embodiment of the present application is shown in the figure;

[0050] Figure 3 A step flow chart of a hydraulic control method based on gas-liquid linkage of an embodiment of the present application is shown in the figure;

[0051] In the figure: 1, air pressure source; 2, root manual valve; 3, check valve; 4, air source filter; 5, first blowdown valve; 6, air tank; 7, safety valve; 8, instrument valve; 9, control pressure total valve; 10, second blowdown valve; 11, main pressure reducing valve; 12, auxiliary pressure reducing valve; 13, open electromagnetic valve; 14, close electromagnetic valve; 15, ESD electromagnetic valve; 16, pneumatic reversing valve; 17, speed regulating valve; 18, gas-liquid conversion tank; 19, third blowdown port; 20, pneumatic acting valve; 21, manual acting valve; 22, actuator; 23, manual hydraulic device; 24, manual reversing valve; 25, silencer; 26, gas-liquid linkage ball valve. DETAILED DESCRIPTION

[0052] The features and exemplary embodiments of various aspects of the present application will be described in detail below, in order to make the purposes, technical solutions and advantages of the present application more clear and apparent, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, but not to limit the present application. The present application can be implemented without some of these specific details by those skilled in the art. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0053] It should be noted that the relative terms such as first and second and the like are used herein only to differentiate one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between such entities or operations. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the elements defined by the statement "comprise" do not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the described elements.

[0054] Please refer to Figure 1 The structure block diagram of the low-latency wireless transmission control system based on an industrial scene according to an embodiment of the present application is shown in the figure, which comprises:

[0055] The gas-liquid linkage module is used to take the gas pressure in the pipeline as a power source to control the opening or closing of the valve.

[0056] The detection module is used to detect the running parameters of the hydraulic control system during the running process to generate historical data.

[0057] The data transmission module is used to transmit the historical data.

[0058] The aging evaluation module is used to calculate the aging score according to the historical data, divide the standard resistance value interval corresponding to the opening or closing of the valve into a plurality of standard subintervals according to the aging score, calculate the current aging score of the valve and determine the corresponding standard subinterval according to the current aging score in response to the opening or closing of the valve.

[0059] The analysis module is used to train the valve resistance model according to the historical data, acquire the standard resistance curve according to the valve resistance model in response to the opening or closing of the valve, compare the standard resistance curve with the standard subinterval, determine whether the standard resistance curve is accurate according to the comparison result, acquire the real-time resistance curve of the valve during the opening or closing measured by the detection module in response to the standard resistance curve being accurate, acquire the abnormal resistance curve according to the real-time resistance curve and the standard resistance curve, determine whether the running of the valve meets the preset standard according to the abnormal resistance curve, and correct the hydraulic pressure of the gas-liquid linkage module during the next opening or closing of the valve according to the real-time resistance curve in response to the running of the valve meeting the preset standard.

[0060] The historical data comprises resistance-related parameters, valve type data, and state parameters, wherein:

[0061] The resistance-related parameters comprise the temperature and water dew point of the gas in the pipeline.

[0062] The valve type data includes a valve bore and a sealing material;

[0063] The state parameters include a standard resistance curve when the valve is opened or closed, and a gas pressure in the pipeline.

[0064] In the implementation, the data transmission module is further configured to transmit remote control data and other data required in the running process; the temperature sensor is configured to acquire a gas temperature in the pipeline, and the local database of the gas transfer station is configured to acquire a water dew point and a gas pressure in the pipeline. The valve type data is acquired through the local database. The standard resistance curve is a curve describing a resistance change of the valve in the opening and closing process, and is acquired through the hydraulic pressure sensor.

[0065] Further, in one aspect, the application uses the gas pressure in the pipeline as a power source, without additional energy consumption to drive the opening and closing of the valve, thereby reducing the energy demand in the gas pipeline transportation process and reducing the laying limit of the gas transfer pipeline. On the other hand, the application divides the standard resistance value interval in the historical data into a plurality of standard subintervals according to the aging score, thereby determining the accuracy of the standard resistance curve output by the subsequent model, providing an accurate data basis for the acquisition of the subsequent abnormal pressure curve, and accurately evaluating the health status of the valve.

[0066] Please refer to Figure 2 Fig. 1 is a structural diagram of a gas-liquid linkage module according to an embodiment of the application, which includes a gas-liquid linkage unit and a manual control unit.

[0067] The gas-liquid linkage unit includes a gas pressure source 1, a root manual valve 2, a one-way valve 3, a gas source filter 4, a gas storage tank 6, a control pressure total valve 9, a main pressure reducing valve 11, a pneumatic reversing valve 16, a gas-liquid conversion tank 18, a pneumatic action valve 20, an actuator 22, and a gas-liquid linkage ball valve 26, which are connected in series through pipelines.

[0068] The pneumatic reversing valve 16 is configured as two, each of which is configured with a speed regulating valve 17 and a silencer 25, and the pipelines between the two pneumatic reversing valves 16 are connected with an open electromagnetic valve 13, a secondary pressure reducing valve 12, an ESD electromagnetic valve 15, and a close electromagnetic valve 14.

[0069] The gas source filter 4 is further provided with a first blowdown valve 5; the gas storage tank 6 is provided with a safety valve 7, an instrument valve 8, and a second blowdown valve 10; and the gas-liquid conversion tank 18 is provided with a third blowdown port 19.

[0070] The manual control unit includes a manual action valve 21, a manual reversing valve 24, and a manual hydraulic device 23.

[0071] The manual control unit and the automatic control circuit of the gas-liquid linkage module are interlocked by the pneumatic valve 20 and the manual valve 21, and the pneumatic valve 20 is automatically cut off in response to the opening of the manual valve 21.

[0072] In detail, taking the gas pressure in the natural gas pipeline as the power source 1, the operation process of the gas-liquid linkage module is as follows:

[0073] The root manual valve 2 is opened, and the natural gas enters the gas source filter 4 through the one-way valve 3. The gas source filter 4 is provided with a first blowdown valve 5 to periodically blow down and ensure the cleanliness of the gas and the reliable operation of the downstream pneumatic accessories.

[0074] The gas enters the gas storage tank 6, and the volume of the gas storage tank 6 can be calculated according to the customer's requirements, such as ensuring that the valve is opened and closed once when the gas storage tank 6 loses gas supply. The gas storage tank 6 is provided with a safety valve 7 to set the working pressure of the safety valve according to the gas pressure to ensure the safe use of the system. The gas storage tank 6 is provided with an instrument valve 8 for real-time monitoring of pressure data. The gas storage tank 6 is provided with a second blowdown valve 10 to periodically blow down the gas storage tank. The outlet of the gas storage tank 6 is provided with a control pressure total valve 9, which can adjust the use pressure of the system according to the fluctuation of the inlet gas pressure.

[0075] The gas enters the main pressure reducing valve 11 through the control pressure total valve 9, and the main pressure reducing valve 11 is used to accurately adjust the pressure and filter the gas. The main pressure reducing valve 11 is connected to the auxiliary pressure reducing valve 12 through a pipeline, and the auxiliary pressure reducing valve 12 is a standby pressure reducing valve device that can effectively ensure the operation of the system when the main pressure reducing valve 11 fails.

[0076] The gas-liquid linkage module is provided with two valve opening and closing methods, including:

[0077] Remote control valve opening and closing: first confirm that the pneumatic valve 20 is in the open state and the manual valve 21 is in the closed state. Click the valve opening button of the control box (this process is realized by pressing the valve opening button in the control room remotely, and the control room also includes an aging evaluation module and an analysis module), open the electromagnetic valve 13, control the right pneumatic reversing valve 16 to open, and the gas enters the right gas-liquid conversion tank 18. The gas-liquid conversion tank 18 has a gas bag and an appropriate amount of hydraulic oil added according to the oil consumption of the actuator 22. The gas enters the gas bag in the gas-liquid conversion tank 18, and the gas bag expands in volume under the action of the gas, and the hydraulic oil in the gas-liquid conversion tank 18 is compressed to enter the oil inlet hole of the right actuator 22, which drives the actuator 22 to make mechanical movement and rotates the gas-liquid linkage ball valve 26 to open the valve.

[0078] At the same time, the left piston moves, and the hydraulic oil of the left oil cylinder returns to the left gas-liquid conversion tank 18. At this time, the left pneumatic reversing valve 16 is opened, and the gas in the left air bag is discharged through the left pneumatic reversing valve 20, the speed regulating valve 17 and the silencer 25 under the action of the hydraulic oil. The speed regulating valve 17 adjusts the speed of the actuator 22 by adjusting the exhaust volume. The silencer 25 reduces noise. Similarly, press the valve closing button, and the system starts from the left side and performs the above-described action steps to achieve valve closing.

[0079] The ESD solenoid valve 15 is a key accessory for remote control. The control chamber controls the system operation through signal conversion of the ESD solenoid valve.

[0080] Use the manual valve 21 to open or close: when the pneumatic system cannot support the operation of the system, the manual control unit can be used to open or close the valve. First, close the two sides of the pneumatic valve 20, and open the two sides of the manual valve 21. Turn the handle of the manual reversing valve 24 to the open position, and press the handle of the manual reversing valve 24 up and down. The hydraulic oil directly enters the right oil cylinder of the actuator 22, and the valve is opened. The hydraulic oil in the left oil cylinder returns to the oil tank. Similarly, turn the handle of the manual reversing valve 21 to the closed position, and press the handle to close the valve.

[0081] Further, according to the aging score, the standard resistance value interval corresponding to the opening or closing of the valve is divided into a plurality of standard sub-intervals, including:

[0082] For the single opening or closing of the valve in the historical data, the corresponding use time, use frequency and state parameters of the valve are obtained, and the use time, use frequency and gas pressure in the pipeline are respectively assigned weight values, the sum of the products of the use time, use frequency and gas pressure in the pipeline and the weight values is calculated and recorded as the aging score;

[0083] The aging score corresponding to each opening or closing of the valve is obtained, and the aging score interval is obtained;

[0084] According to the preset step, the aging score interval is divided to obtain a plurality of sub-score intervals;

[0085] The standard resistance curve corresponding to the aging score in each sub-score interval in the historical data is obtained, the standard resistance value interval corresponding to each opening or closing of the valve is obtained according to the standard resistance curve, the union of the standard resistance value interval corresponding to each opening or closing is taken, and it is recorded as the standard sub-interval.

[0086] In implementation, the aging score interval is obtained in the following manner: the service time, service frequency, state parameters and standard resistance curve of the valve replaced due to natural aging in the historical data are obtained, the value of the aging score is calculated respectively and the maximum value is taken, the aging score of the new valve is determined as 0, and the interval composed of 0 and the maximum value is recorded as the aging score interval. It can be understood that in the actual use process of the valve, as the valve continuously ages, the resistance in the opening and closing process of the valve gradually increases, each aging condition has a corresponding aging score and standard resistance curve, that is, the standard resistance curve and the aging score have a corresponding relationship.

[0087] Specifically, the standard sub-interval is determined in the following manner: for a single sub-score interval, the standard resistance curves corresponding to all aging scores in the sub-score interval are obtained from the historical data; the standard resistance curves are analyzed accordingly to obtain the resistance values corresponding to the maximum and minimum values of the ordinate in the coordinate system, the interval formed by the resistance values corresponding to the maximum and minimum values is recorded as the standard resistance value interval corresponding to the aging score corresponding to the standard resistance curve; the union of the standard resistance value intervals corresponding to each aging score in the same sub-score interval is recorded as the standard sub-interval corresponding to the sub-score interval.

[0088] It should be noted that for the single opening or closing of the valve in the historical data, the service time, service frequency and state parameters of the valve are obtained, and these data are obtained when the valve normally ages without abnormal resistance or when the abnormal resistance has less than 1% impact on the resistance in the opening or closing process. The weight values of the service time, service frequency and gas pressure in the pipeline are set by the system, and the sum of the weight values of the service time, service frequency and gas pressure in the pipeline is equal to 1. The preset step is selected according to the aging score interval and the actual situation, in the embodiment of the present application, the aging score interval is 0-180 points, according to the computing power of the computer used for operation and the aging score interval of 0-180 points, the preset step is selected as 20 points, the standard sub-interval corresponding to the single sub-score interval is obtained, and the corresponding relationship between the sub-score interval and the standard sub-interval is stored as data in the database of the control room.

[0089] In detail, during use, as the valve gradually ages, the resistance when the valve opens or closes will become larger and larger, and there is a certain corresponding relationship between the two, and the normal aging of the valve is affected by multiple factors, the present application calculates the weighted sum by means of multi-dimensional data and additional weight value, avoids the case that a single-dimensional data is affected by the environment and thus leads to inaccurate evaluation results, and according to the aging score and historical data, the corresponding relationship between the aging score and the resistance during normal aging is obtained, so as to determine the output result of the subsequent model and increase the detection accuracy of the running state of the valve.

[0090] Further, the valve resistance model is trained according to historical data, comprising:

[0091] The state parameters in the historical data are acquired to generate a training data set, and the historical data in the training data set also correspond to resistance correlation parameters and valve type data of the hydraulic control system during operation, the valve resistance model is generated by training according to the training data set, and if the resistance correlation parameters, valve type data and gas pressure in the pipeline are input, the standard resistance curve when the valve opens or closes is output.

[0092] In implementation, in the training data set, each type of valve corresponds to 100 valve historical data, and each valve historical data includes 500 opening or closing historical data, and each opening or closing historical data includes resistance correlation parameters, valve type data and state parameters. The resistance correlation parameters, valve type data and state parameters are highly related to the valve aging degree and the resistance when opening or closing, and the process of constructing the model and training the model according to the known data is a prior art, which will not be described here.

[0093] Further, the present application constructs the valve resistance model to obtain the resistance curve during normal aging of the valve and closing process of the valve, provides accurate data basis for obtaining abnormal resistance curve according to real-time resistance curve and standard resistance curve, and thus increases the detection accuracy of the running state of the valve.

[0094] Further, the standard resistance curve is compared with the standard sub-interval, and whether the standard resistance curve is accurate is determined according to the comparison result, comprising:

[0095] The standard sub-interval is acquired, the standard resistance curve is acquired according to the valve resistance model, the standard resistance curve is compared with the standard sub-interval, and in response to the resistance values corresponding to the standard resistance curve being in the standard sub-interval, it is determined that the standard resistance curve output by the valve resistance model is accurate.

[0096] In response to the resistance value corresponding to the standard resistance curve being outside the standard subinterval, it is determined that the standard resistance curve output by the valve resistance model is inaccurate, and the analysis module automatically corrects the valve resistance model according to historical data.

[0097] Further, in response to determining that the standard resistance curve output by the valve resistance model is accurate, a real-time resistance curve when the valve is opened or closed is obtained, and an abnormal resistance curve is obtained according to the real-time resistance curve and the standard resistance curve, including:

[0098] A plane rectangular coordinate system with the abscissa being the valve opening value and the ordinate being the resistance value is established;

[0099] In the plane rectangular coordinate system, the real-time resistance curve and the standard resistance curve are generated;

[0100] For a single valve opening value, the abnormal resistance value is obtained by subtracting the resistance value of the standard resistance curve from the resistance value of the real-time resistance curve, the abnormal resistance values corresponding to other valve opening values are calculated, and the abnormal resistance curve is determined according to the calculation result.

[0101] Further, it is determined whether the operation of the valve meets the preset standard according to the abnormal resistance curve, in response to the resistance values of the abnormal resistance curve being less than the resistance threshold, it is determined that the operation of the valve meets the preset standard;

[0102] In response to the existence of a point on the abnormal resistance curve with a resistance value greater than or equal to the resistance threshold, it is determined that the operation of the valve does not meet the preset standard, and a maintenance notice is sent to the control room.

[0103] In implementation, the resistance threshold is dynamically selected according to 1.2 times of the upper limit of the standard subinterval. The valve opening value is detected by an angular displacement sensor arranged on the gas-liquid linkage ball valve 26.

[0104] Further, at the next time when the valve is opened or closed, the hydraulic pressure of the gas-liquid linkage module is corrected according to the real-time resistance curve, including:

[0105] The real-time resistance curve is obtained, and the correction amplitude is positively correlated with the maximum resistance value of the real-time resistance curve, the greater the maximum resistance value of the real-time resistance curve, the greater the hydraulic pressure after correction when the valve is opened or closed next time.

[0106] In implementation, the hydraulic pressure is adjusted by establishing a mapping table of the real-time maximum resistance value and the pressure correction amplitude, and the selection range of the pressure correction amplitude is determined according to the current pressure value, the maximum hydraulic pressure value under the condition of ensuring safety and other actual conditions.

[0107] Please refer to Figure 3 Fig. 1 shows a step flowchart of the hydraulic control method based on gas-liquid linkage of the embodiment of the present application, including:

[0108] Step S1, taking the gas pressure in the pipeline as a power source, controlling the opening or closing of the valve;

[0109] Step S2, detecting the running parameters of the hydraulic control system during operation to generate historical data;

[0110] Step S3, transmitting the historical data;

[0111] Step S4, calculating the aging score according to the historical data, dividing the standard resistance value interval corresponding to the opening or closing of the valve into several standard subintervals according to the aging score, calculating the current aging score of the valve and determining the corresponding standard subinterval according to the current aging score in response to the opening or closing of the valve;

[0112] Step S5, training the valve resistance model according to the historical data, acquiring the standard resistance curve according to the valve resistance model in response to the opening or closing of the valve, comparing the standard resistance curve with the standard subinterval, determining whether the standard resistance curve is accurate according to the comparison result, acquiring the real-time resistance curve measured by the detection module when the valve is opened or closed in response to the standard resistance curve being accurate, acquiring the abnormal resistance curve according to the real-time resistance curve and the standard resistance curve, determining whether the operation of the valve meets the preset standard according to the abnormal resistance curve, and correcting the hydraulic pressure of the gas-liquid linkage module when the valve is opened or closed next time according to the real-time resistance curve in response to the operation of the valve meeting the preset standard.

[0113] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A hydraulic control system based on gas-liquid linkage, characterized by, The method comprises the following steps: A gas-liquid linkage module is used to take the gas pressure in the pipeline as a power source to control the opening or closing of the valve. A detection module is used to detect the operating parameters of the hydraulic control system during operation to generate historical data. A data transmission module is used to transmit the historical data. An aging evaluation module is used to calculate an aging score according to the historical data, divide the standard resistance value interval corresponding to the opening or closing of the valve into a plurality of standard subintervals according to the aging score, calculate the current aging score of the valve and determine the corresponding standard subinterval according to the current aging score in response to the opening or closing of the valve. An analysis module is used to train a valve resistance model according to the historical data, acquire a standard resistance curve according to the valve resistance model in response to the opening or closing of the valve, compare the standard resistance curve with the standard subinterval, determine whether the standard resistance curve is accurate according to the comparison result, acquire a real-time resistance curve when the valve is opened or closed in response to the standard resistance curve being accurate, acquire an abnormal resistance curve according to the real-time resistance curve and the standard resistance curve, determine whether the operation of the valve meets a preset standard according to the abnormal resistance curve, and correct the hydraulic pressure of the gas-liquid linkage module according to the real-time resistance curve when the valve is opened or closed next time in response to the operation of the valve meeting the preset standard. The historical data comprises resistance-related parameters, valve type data, and state parameters, wherein: The resistance-related parameters comprise the temperature and water dew point of the gas in the pipeline. The valve type data comprises the valve diameter and sealing material. The state parameters comprise the standard resistance curve when the valve is opened or closed, and the gas pressure in the pipeline.

2. The gas and liquid coupled based hydraulic control system of claim 1, wherein, The gas-liquid linkage module comprises a gas-liquid linkage unit and a manual control unit. The gas-liquid linkage unit comprises a gas pressure source (1), a root manual valve (2), a one-way valve (3), a gas source filter (4), a gas storage tank (6), a control pressure total valve (9), a main pressure reducing valve (11), a pneumatic reversing valve (16), a gas-liquid conversion tank (18), a pneumatic action valve (20), an actuator (22), and a gas-liquid linkage ball valve (26) connected in series through the pipeline. The pneumatic reversing valve (16) is configured with a speed regulating valve (17) and a silencer (25), and the two pneumatic reversing valves (16) are connected by an open electromagnetic valve (13), a secondary pressure reducing valve (12), an ESD electromagnetic valve (15), and a close electromagnetic valve (14). The gas source filter (4) is further provided with a first blowdown valve (5), the gas storage tank (6) is provided with a safety valve (7), an instrument valve (8), and a second blowdown valve (10), and the gas-liquid conversion tank (18) is provided with a third blowdown port (19). The manual control unit comprises a manual action valve (21), a manual reversing valve (24), and a manual hydraulic device (23).

3. The gas-hydraulic control system according to claim 2, wherein The manual control unit and the automatic control loop of the gas-liquid linkage module are interlocked through a pneumatic action valve (20) and a manual action valve (21), and the pneumatic action valve (20) is automatically cut off in response to the opening of the manual action valve (21).

4. The gas-hydraulic control system according to claim 1, wherein The standard resistance value interval corresponding to the opening or closing of the valve is divided into a plurality of standard subintervals according to the aging score, including: For a single opening or closing of the valve in the historical data, the use time, use frequency and state parameters of the corresponding valve are obtained, and the use time, use frequency and gas pressure in the pipeline are respectively assigned weight values, and the sum of the products of the use time, use frequency and gas pressure in the pipeline and the corresponding weight values is calculated and recorded as the aging score; The aging scores corresponding to each opening or closing of the valves of the same type in the historical data are obtained, and the aging score interval is obtained; The aging score interval is divided into a plurality of sub-score intervals according to a preset step length; The standard resistance curve corresponding to the aging score in each sub-score interval in the real-time historical data is obtained, the standard resistance value interval corresponding to each opening or closing of the valve is obtained according to the standard resistance curve, the union of the standard resistance value intervals corresponding to each opening or closing of the valve is taken, and it is recorded as a standard subinterval.

5. The gas-hydraulic control system according to claim 4, wherein The valve resistance model is trained according to the historical data, including: The state parameters in the historical data are obtained to generate a training data set, and the historical data in the training data set also correspond to resistance-related parameters and valve type data of the hydraulic control system in the running process, the valve resistance model is generated according to the training data set, and if the resistance-related parameters, valve type data and gas pressure in the pipeline are input, the standard resistance curve of the valve opening or closing is output.

6. The gas-hydraulic control system according to claim 5, wherein The standard resistance curve and the standard subinterval are compared, and whether the standard resistance curve is accurate is determined according to the comparison result, including: The standard subinterval is obtained, the standard resistance curve is obtained according to the valve resistance model, the standard resistance curve is compared with the standard subinterval, and in response to the resistance values corresponding to the standard resistance curve being within the standard subinterval, it is determined that the standard resistance curve output by the valve resistance model is accurate; In response to the resistance values corresponding to the standard resistance curve being outside the standard subinterval, it is determined that the standard resistance curve output by the valve resistance model is inaccurate, and the analysis module automatically corrects the valve resistance model according to the historical data.

7. The gas-hydraulic control system according to claim 6, characterized in that In response to the standard resistance curve being accurate, the real-time resistance curve of the valve opening or closing is obtained, and the abnormal resistance curve is obtained according to the real-time resistance curve and the standard resistance curve, including: A plane rectangular coordinate system with the valve opening value as the horizontal coordinate and the resistance value as the vertical coordinate is established; In the plane rectangular coordinate system, the real-time resistance curve and the standard resistance curve are generated; For a single valve opening value, the abnormal resistance value is obtained by subtracting the resistance value of the standard resistance curve from the resistance value of the real-time resistance curve, the abnormal resistance values corresponding to other valve opening values are calculated, and the abnormal resistance curve is determined according to the calculation result.

8. The gas-hydraulic control system according to claim 7, characterized in that The abnormal resistance curve is used to determine whether the valve operation meets the preset standard. If all resistance values of the abnormal resistance curve are less than the resistance threshold, it is determined that the valve operation meets the preset standard. If there is a point on the abnormal resistance curve with a resistance value greater than or equal to the resistance threshold, it is determined that the valve operation does not meet the preset standard, and a maintenance notice is issued.

9. The gas-hydraulic control system according to claim 1, wherein The hydraulic pressure of the gas-liquid linkage module is corrected according to the real-time resistance curve when the valve is opened or closed next time, including: Obtain the real-time resistance curve. The correction amplitude is positively correlated with the maximum resistance value of the real-time resistance curve. The greater the maximum resistance value of the real-time resistance curve, the greater the corrected hydraulic pressure.

10. A gas-hydraulic control method based on the gas-hydraulic control system according to any one of claims 1 to 9, characterized in that It includes: The gas pressure in the pipeline is used as a power source to control the opening or closing of the valve. Detect the operating parameters of the hydraulic control system during operation to generate historical data. Transmit the historical data. Calculate the aging score according to the historical data, divide the standard resistance value interval corresponding to the opening or closing of the valve into several standard subintervals according to the aging score, calculate the current aging score of the valve and determine the corresponding standard subinterval according to the current aging score in response to the opening or closing of the valve. Train the valve resistance model according to the historical data. In response to the opening or closing of the valve, obtain the standard resistance curve according to the valve resistance model, compare the standard resistance curve with the standard subinterval, determine whether the standard resistance curve is accurate according to the comparison result, obtain the real-time resistance curve when the valve is opened or closed in response to the standard resistance curve being accurate, obtain the abnormal resistance curve according to the real-time resistance curve and the standard resistance curve, determine whether the valve operation meets the preset standard according to the abnormal resistance curve, and correct the hydraulic pressure of the gas-liquid linkage module according to the real-time resistance curve when the valve is opened or closed next time.

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