Regulation control system based on pressure reducing valve

Abstract

The invention relates to the technical field of pressure reducing valve regulation and control, in particular to a regulation and control system based on pressure reducing valves, which comprises a plurality of pressure reducing valves, a plurality of actuators, a plurality of collectors and a console, for the same pipeline to be regulated, at least one group of pressure reducing valves is arranged, and at least two pressure reducing valves are arranged in one group; each pressure reducing valve is provided with an actuator responding to adjustment of the console, and the actuator is used for adjusting operation parameters of the pressure reducing valve when the console initiates an adjustment instruction. A plurality of collectors corresponding to the pressure reducing valves are arranged on corresponding pipelines of the pressure reducing valves and are used for collecting pressure, flow and adjustment steps of the corresponding pipelines of the pressure reducing valves; the console responds to the parameters of the adjustment steps to adjust the parameters of the other pressure reducing valves in the corresponding pressure reducing valves; according to the pressure reducing valve group provided by the scheme, the perspectiveness of monitoring the pressure reducing valve is effectively improved, and meanwhile, the risk caused by equipment fatigue or equipment aging is avoided, so that the robustness of a pressure reducing valve control system is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure reducing valve regulation and control, and in particular to a regulation and control system based on a pressure reducing valve. Background Technique

[0002] The existing pressure reducing valve control technologies are mainly divided into two categories: mechanical control and electronic control. Mechanical control includes direct-acting and pilot-operated pressure reducing valves. The former adjusts the valve core through a spring or a weight, with a simple structure but low precision; the latter uses a pilot valve to drive the main valve, which is suitable for high-pressure and large-flow systems and has better stability. Electronic control technologies such as electro-hydraulic proportional pressure reducing valves and servo-controlled pressure reducing valves achieve high-precision regulation through electrical signals or closed-loop feedback.

[0003] Chinese Patent Authorization Publication No.: CN118625862B discloses an intelligent control system for the flow rate of electronic special gases, which relates to the technical field of gas flow control. The operation prediction module comprehensively analyzes the seal surface defect degree, air pressure deviation index, and concentration accumulation coefficient through a prediction model, and then judges whether the gas supply system still supports operation. If it is judged that the gas supply system does not support operation, a warning signal is sent and the gas supply system is controlled to stop operating. If it is judged that the gas supply system supports operation, it is predicted whether the gas flow rate will fluctuate. When it is predicted that the gas flow rate will fluctuate, the regulating valve control module substitutes the predicted model function value into the sliding mode control algorithm, and the sliding mode control algorithm controls the opening degree of the regulating valve of the gas supply system through the total control output. This control system predicts the change trend of the flow rate of phosphine gas during the injection process of phosphine gas and adjusts it in advance to ensure the consistency and reliability of the ion implantation process, thereby improving the quality and production efficiency of semiconductor products.

[0004] However, the above method has the following problems: when the pressure reducing valve shows signs of fatigue or aging, it cannot be detected in time, resulting in the loss of control of the entire pipeline. At the same time, the pressure reducing valve system is not equipped with sufficient redundancy, and it is difficult to quickly switch to an available line when the pressure reducing valve fails, thereby reducing the reliability of the pressure reducing system. Summary of the Invention

[0005] Therefore, the present invention provides a regulation and control system based on a pressure reducing valve to overcome the problems in the prior art that when the pressure reducing valve shows signs of fatigue or aging, it cannot be detected in time, resulting in the loss of control of the entire pipeline. At the same time, the pressure reducing valve system is not equipped with sufficient redundancy, and it is difficult to quickly switch to an available line when the pressure reducing valve fails, thereby reducing the reliability of the pressure reducing system.

[0006] To achieve the above object, the present invention provides a regulation and control system based on a pressure reducing valve, which is composed of a number of pressure reducing valves, a number of actuators, a number of collectors, and a console. Among them,

[0007] For the same pipeline to be adjusted, at least one set of pressure reducing valves is provided, and at least two pressure reducing valves are provided in one set;

[0008] An actuator responsive to the adjustment of the control console is provided on each pressure reducing valve, and is used for adjusting the operating parameters of the pressure reducing valve when the control console issues an adjustment instruction;

[0009] A number of collectors corresponding to the pressure reducing valves are provided on the corresponding pipelines of each pressure reducing valve, and are used for collecting the pressure, flow rate and adjustment step of the pipeline corresponding to the pressure reducing valve;

[0010] Each actuator and each collector are connected to the control console, and are used for collecting pipeline information and responding to the instructions of the control console to control the corresponding pressure reducing valve and / or other valve components;

[0011] The control console responds to the parameter adjustment of the pressure and flow rate to adjust the parameters of the corresponding pressure reducing valve;

[0012] The control console responds to the parameter of the adjustment step to adjust the parameters of the remaining pressure reducing valves in the corresponding pressure reducing valve;

[0013] Wherein, the adjustment step is the change amount of the pressure or flow rate collected by the collector per unit time when the actuator adjusts the corresponding pressure reducing valve.

[0014] Further, the control console responds to the abnormal decrease of the adjustment step, and determines the corresponding pressure reducing valve as a fatigued pressure reducing valve;

[0015] The control console responds to the abnormal increase of the adjustment step, and determines the corresponding pressure reducing valve as an aging pressure reducing valve;

[0016] The abnormal decrease is that the adjustment step is lower than the minimum adjustment step threshold, and the abnormal increase is that the adjustment step is higher than the maximum adjustment step threshold;

[0017] The minimum adjustment step threshold is related to the elastic component of the pressure reducing valve;

[0018] The maximum adjustment step threshold is related to the sealing component of the pressure reducing valve.

[0019] Further, the control console is also provided with an adjustment model associated with the pressure reducing valve group,

[0020] The adjustment model responds to the instructions issued by the control console to each actuator, simulates the adjustment process and the adjustment result, and generates the corresponding simulation process and simulation result;

[0021] Wherein, the simulation result is the corresponding pipeline state that can be achieved when the pressure reducing valve completes the adjustment, and the simulation process is the corresponding pipeline state of several cycles from the start of the adjustment to the simulation result with the unit time as the cycle.

[0022] Furthermore, for single adjustment, the console adjusts each pressure reducing valve on the pipeline to be adjusted according to the adjustment process, records the corresponding adjustment steps, and at the same time, compares the adjustment steps with the adjustment process.

[0023] If the change amount of the adjustment steps at any point is not greater than the error range of the corresponding change amount of the adjustment process, the console determines that the pressure reducing valve is in a stable state.

[0024] If the change amount of the adjustment steps at any point is greater than the error range of the corresponding change amount of the adjustment process, the console determines that the pressure reducing valve is in an unstable state.

[0025] The error range is the corresponding change degree of the curve of the adjustment steps or the curve of the adjustment process, and its upper limit is not higher than the highest adjustment step threshold, and the lower limit is not lower than the lowest adjustment step threshold.

[0026] Furthermore, when the console responds that the pressure reducing valve is in the stable state, it compares the adjustment result with the corresponding state when the pipeline to be adjusted is completed, and adjusts the adjustment model according to the comparison result.

[0027] Furthermore, when the console responds that the pressure reducing valve is in the unstable state, it determines the abnormal state of the pressure reducing valve according to the adjustment result.

[0028] If the adjustment result is not less than the target adjustment range, the console determines that the pressure reducing valve is in an incremental abnormality.

[0029] If the adjustment result is not greater than the target adjustment range, the console determines that the pressure reducing valve is in a decremental abnormality.

[0030] Furthermore, if the adjustment result is within the target adjustment range of the state when the pipeline to be adjusted is completed, the console determines that the pressure reducing valve is in a running-in state, and updates the adjustment model according to the adjustment steps in the next adjustment cycle.

[0031] The target adjustment range is the parameter interval where the parameters corresponding to the adjustment instruction are located.

[0032] Furthermore, for a single pressure reducing valve, if the console determines that the pressure reducing valve is a fatigued pressure reducing valve, the console extends the adjustment cycle of the pressure reducing valve.

[0033] Among them, extending the adjustment cycle of the pressure reducing valve means adjusting and extending the unit time of the pipeline corresponding to the fatigued pressure reducing valve by at least 50%, and monitoring according to the adjustment model.

[0034] Further, for a single pressure reducing valve, if the console determines that the pressure reducing valve is an aging pressure reducing valve, the console determines to close the pipeline corresponding to the pressure reducing valve.

[0035] Further, for the corresponding pressure reducing valves determined as fatigue pressure reducing valves or aging pressure reducing valves within any determined range, the console determines to give a damage alarm for the pressure reducing valves.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows. By setting a number of pressure reducing valves, a number of actuators, a number of collectors and a console, the pressure reducing valves are set in groups on the pipeline to be adjusted, and by means of simulation, the states of the pressure reducing valves in the ideal state and the actual state are determined, and whether the pressure reducing valves are in a fatigue or aging state is distinguished. While effectively improving the prospectiveness of the monitoring of the pressure reducing valves, the risks brought by equipment fatigue or equipment aging are avoided, thereby effectively improving the robustness of the pressure reducing valve control system.

[0037] Further, by determining the adjustment steps, it is determined whether the pressure reducing valve is normal during operation, and the pressure reducing valves with too slow adjustment and too fast adjustment are classified to determine the corresponding damage environment of the pressure reducing valve. For the pressure reducing valve with slower adjustment, it is determined that the pressure reducing valve cannot be quickly sealed due to the fatigue of the sealing material, resulting in difficulty in adjustment. For the pressure reducing valve with too fast adjustment, it is determined that the elastic material is aged and cannot buffer, which may cause water hammer due to too fast adjustment, or it is difficult to achieve the expected result at the end of the adjustment. While effectively avoiding the risks brought by equipment fatigue or equipment aging, the robustness of the pressure reducing valve control system is further improved.

[0038] Further, by setting an adjustment model, the operation process of the pressure reducing valve under normal conditions and the change of the corresponding pipeline under normal conditions corresponding to the operation process are determined. By comparing the adjustment model and the operation process, the working state of the pressure reducing valve is determined, and by compressing or extending the test period, it is determined whether the abnormality of the pressure reducing valve can digest the corresponding damage through the system operation, or whether a new balance can be established after damage, thereby effectively improving the robustness of the pressure reducing valve control system.

[0039] Further, by determining the damage of the pressure reducing valve, other pressure reducing valves set in the same group are used to replace the damaged pressure reducing valve. While effectively avoiding the situation that the whole system cannot operate due to the replacement of the pressure reducing valve, the reliability of the system is effectively improved.

[0040] Further, by warning the damaged pressure reducing valve, the pressure reducing valve entering the fatigue state is warned in advance. While avoiding the pipeline damage caused by the damage of the pressure reducing valve, sufficient maintenance time is provided for the pipeline where the pressure reducing valve is located, thereby further improving the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic structural diagram of the pressure reducing valve regulating control system of the present invention;

[0042] Figure 2 It is a schematic structural diagram of the pressure reducing and regulating system of the industrial water supply network in the embodiment of the present invention;

[0043] Figure 3 It is a schematic structural diagram of the multi-stage pressure reducing system of the natural gas transmission and distribution station in the embodiment of the present invention. Detailed implementation manners

[0044] In order to make the objectives and advantages of the present invention more clear and understandable, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] The preferred implementation manners of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0046] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0047] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] Please refer to Figure 1 as shown, it is a schematic structural diagram of the pressure reducing valve regulating control system of the present invention. This system is composed of several pressure reducing valves, several actuators, several collectors and a console.

[0049] For the same pipeline to be regulated, at least one group of pressure reducing valves is provided, and at least two pressure reducing valves are provided in one group;

[0050] Each pressure reducing valve is provided with an actuator that responds to the regulation of the console to adjust the operating parameters of the pressure reducing valve when the console issues a regulation instruction;

[0051] On the corresponding pipelines of each pressure reducing valve, a number of collectors corresponding to the pressure reducing valve are provided to collect the pressure, flow rate and adjustment step of the pipeline corresponding to the pressure reducing valve;

[0052] Each actuator and each collector are connected to the console to collect pipeline information and respond to the instructions of the console to control the corresponding pressure reducing valve and / or other valve components;

[0053] The console adjusts the parameters of the corresponding pressure reducing valve in response to the parameters of pressure and flow rate;

[0054] The console adjusts the parameters of the remaining pressure reducing valves in the corresponding pressure reducing valve in response to the parameters of the adjustment step;

[0055] Among them, the adjustment step is the change amount of the pressure or flow rate collected by the collector per unit time when the actuator adjusts the corresponding pressure reducing valve.

[0056] By setting a number of pressure reducing valves, a number of actuators, a number of collectors and a console, the pressure reducing valves are set in groups on the pipeline to be adjusted, and by using a simulation method, the states of the pressure reducing valves in the ideal state and the actual state are determined, and whether the pressure reducing valves are in a fatigue or aging state is distinguished. While effectively improving the forward-looking of the monitoring of the pressure reducing valve, the risks brought by equipment fatigue or equipment aging are avoided, thereby effectively improving the robustness of the pressure reducing valve control system.

[0057] In implementation, for different scenarios, it can be set as follows:

[0058] Please refer to Figure 2 As shown, it is a schematic structural diagram of the pressure reducing and regulating system of the industrial water supply network in the embodiment of the present invention. The system structure in the figure is as follows:

[0059] Pressure reducing valve group: Two groups of pressure reducing valves (Group A and Group B) are set at the key nodes of the main pipeline, and each group contains two parallel pressure reducing valves (A1 / A2, B1 / B2).

[0060] Actuator: Each pressure reducing valve (such as A1) is equipped with an electric actuator to receive the console instruction to adjust the opening.

[0061] Collector: Pressure sensors (P1 / P2) and flow meters (F1 / F2) are installed on the upstream and downstream pipelines of each group of pressure reducing valves to monitor the pressure, flow rate and adjustment step (such as the pressure change rate ΔP / second) in real time.

[0062] Console: Centralizes the processing of the collector data and issues corresponding instructions according to the data.

[0063] Workflow:

[0064] Initial state: Group A (A1 / A2) actively regulates, Group B is on standby. P1 detects pressure exceeding the limit (0.8MPa>set value 0.6MPa).

[0065] Adjustment of group A: The console instructs the A1 actuator to gradually close the opening, and the collector feedback pressure decreases at a regulation pace of 0.05MPa / s.

[0066] Linkage with group B: The console calculates the pre-adjustment amount of group B synchronously according to the adjustment pace. When the pressure drops to 0.65MPa, B1 is started to fine-tune the opening in advance to avoid overload of group A.

[0067] Steady-state maintenance: After the pressure stabilizes, the A / B groups work together to maintain dynamic balance, and the collector continuously monitors the adjustment pace (such as ΔP≈0) to prevent oscillation.

[0068] See also Figure 3 As shown, it is a structural schematic diagram of a multi-stage pressure reduction system for a natural gas transmission and distribution station according to an embodiment of the present invention. In the figure, the system structure is as follows:

[0069] Pressure reducing valve group: The high-pressure gas pipeline is divided into three stages of pressure reduction (primary group X, secondary group Y, and standby group Z), each group contains three redundant pressure reducing valves (X1-X3, etc.).

[0070] Actuator: The pneumatic actuator drives the valve core, supporting fast response (e.g. X1 can fully open → fully closed within 1 second).

[0071] Collector: High-precision differential pressure transmitters (DP1-DP3) and thermal flow meters (Q1-Q3) are deployed before and after each valve group, with a sampling frequency of 100Hz.

[0072] Control console: Equipped with SCADA interface (Supervisory Control and Data Acquisition), real-time display of regulation pace (such as flow change ΔQ / minute) and trend prediction.

[0073] Working scenario:

[0074] Gas consumption peak: Q1 detection flow rate suddenly increases by 40%, primary group X1 / X2 linkage expansion, but the adjustment pace is too fast (ΔQ = 10m 3 / min / s>safety threshold).

[0075] Stride Feedback Adjustment:

[0076] The console immediately slows down the adjustment rate of X1 / X2 and starts the secondary group Y1 at ΔQ=5m 3 A gentle pace of / min / s is introduced.

[0077] According to the actual pace of group X (such as the final ΔQ=6.2), the pre-adjustment parameters of Y2 / Y3 are dynamically modified.

[0078] Fault tolerance mechanism: If a certain collector (such as DP2) fails, the console switches to the standby logic and estimates the current pressure gradient based on the adjustment pace of the adjacent group (Group Z).

[0079] Specifically, when the console responds to the abnormal decrease in the adjustment pace, it determines the corresponding pressure reducing valve as a fatigued pressure reducing valve;

[0080] When the console responds to the abnormal increase in the adjustment pace, it determines the corresponding pressure reducing valve as an aged pressure reducing valve;

[0081] The abnormal decrease is that the adjustment pace is lower than the minimum adjustment pace threshold, and the abnormal increase is that the adjustment pace is higher than the maximum adjustment pace threshold;

[0082] The minimum adjustment pace threshold is related to the elastic component of the pressure reducing valve;

[0083] The maximum adjustment pace threshold is related to the sealing component of the pressure reducing valve.

[0084] In implementation, for scenario α, it can be set as follows:

[0085] Minimum adjustment pace threshold (related to the elastic component): 0.02 MPa / s (if the adjustment pace < this value, it indicates that the spool spring rebounds insufficiently and may be fatigued)

[0086] Maximum adjustment pace threshold (related to the sealing component): 0.1 MPa / s (if the adjustment pace > this value, it indicates that the valve seat seal is worn and may be aged)

[0087] Example α1: Pressure reducing valve A1 is determined as a fatigued valve

[0088] Phenomenon: The console instructs A1 to close the opening, but the collector feedback shows that the adjustment pace is only 0.01 MPa / s (<0.02 MPa / s).

[0089] Analysis:

[0090] The elastic component (such as the spool spring) loses its elasticity due to long-term compression, resulting in slow response.

[0091] The console marks A1 as a "fatigued pressure reducing valve", automatically reduces its priority, and switches to A2 as the main regulating valve.

[0092] Subsequent actions: Trigger a maintenance alarm to prompt for inspection or replacement of the spring component of A1.

[0093] Example α2: Pressure reducing valve B2 is determined as an aged valve

[0094] Phenomenon: When B2 is adjusted, the pressure drops suddenly by 0.15 MPa / s (>0.1 MPa / s), and there is also a flow rate fluctuation.

[0095] Analysis:

[0096] The sealing component (such as the valve seat rubber) is worn, resulting in medium leakage and out-of-control adjustment steps.

[0097] Mark B2 on the console as "aging pressure reducing valve", immediately close B2 and activate the standby valve B3.

[0098] Subsequent actions: Check the wear condition of the B2 sealing ring and replace it as a whole if necessary.

[0099] For scenario β, it can be set as follows:

[0100] Minimum adjustment step threshold (related to the elastic component): 2m 3 / min / s (if < this value, it indicates that the valve stem or diaphragm is hardened)

[0101] Maximum adjustment step threshold (related to the sealing component): 8m 3 / min / s (if > this value, it indicates that the valve port seal fails)

[0102] Example β1: The pressure reducing valve X3 is determined to be a fatigued valve

[0103] Phenomenon: When X3 performs opening adjustment, the flow rate changes by only 1.5m 3 / min / s (< 2m 3 / min / s).

[0104] Analysis:

[0105] The valve stem or pneumatic diaphragm loses flexibility due to long-term high-pressure gas impact, resulting in sluggish movement.

[0106] The console removes X3 from the active adjustment sequence and uses X1 / X2 to bear the main load.

[0107] Subsequent actions: Disassemble X3 to check the valve stem lubrication or diaphragm cracking condition.

[0108] Example β2: The pressure reducing valve Y1 is determined to be an aging valve

[0109] Phenomenon: When Y1 is adjusted, the flow rate soars to 12m 3 / min / s (> 8m 3 / min / s), and the pressure cannot be stabilized.

[0110] Analysis:

[0111] The valve port sealing surface (such as metal hard seal) generates grooves due to long-term friction, resulting in accelerated medium leakage.

[0112] The console determines Y1 as an "aging pressure reducing valve", locks its opening and activates the Z-group redundant valve.

[0113] Subsequent actions: Grind or replace the valve seat and valve core sealing components of Y1.

[0114] By determining the adjustment steps, it is determined whether the pressure reducing valve is operating normally during operation, and the pressure reducing valves with slow adjustment and fast adjustment are classified to determine the corresponding damage environment of the pressure reducing valve. For the pressure reducing valve with slow adjustment, it is determined that the pressure reducing valve cannot be quickly sealed due to the fatigue of the sealing material, resulting in difficulty in adjustment. For the pressure reducing valve with fast adjustment, it is determined that the elastic material is aged and cannot buffer, which may cause water hammer due to fast adjustment, or it is difficult to achieve the expected result at the end of adjustment. This effectively avoids the risks brought by equipment fatigue or equipment aging and further improves the robustness of the pressure reducing valve control system.

[0115] Specifically, the console is also provided with an adjustment model associated with the pressure reducing valve group.

[0116] The adjustment model responds to the instructions issued by the console to each actuator, simulates the adjustment process and the adjustment result, and generates the corresponding simulation process and simulation result.

[0117] Among them, the simulation result is the corresponding pipeline state that the pressure reducing valve can reach when the adjustment is completed, and the simulation process is the corresponding pipeline state of several cycles from the start of adjustment to the simulation result with a unit time as the cycle.

[0118] Specifically, for a single adjustment, the console adjusts each pressure reducing valve on the pipeline to be adjusted according to the adjustment process, records the corresponding adjustment steps, and at the same time, compares the adjustment steps with the adjustment process.

[0119] If the change amount of the adjustment steps at any point is not greater than the error range of the corresponding change amount of the adjustment process, the console determines that the pressure reducing valve is in a stable state.

[0120] If the change amount of the adjustment steps at any point is greater than the error range of the corresponding change amount of the adjustment process, the console determines that the pressure reducing valve is in an unstable state.

[0121] The error range is the corresponding change degree of the curve of the adjustment steps or the curve of the adjustment process, and its upper limit is not higher than the highest adjustment step threshold, and the lower limit is not lower than the lowest adjustment step threshold.

[0122] Specifically, when the pressure reducing valve is in a stable state, the console compares the adjustment result with the corresponding state when the pipeline to be adjusted is completed, and adjusts the adjustment model according to the comparison result.

[0123] By setting the adjustment model, the normal operation process of the pressure reducing valve and the changes in the corresponding pipelines under normal operation are determined. By comparing the adjustment model with the operation process, the working state of the pressure reducing valve is determined. And by compressing or extending the test cycle, it is determined whether the abnormal conditions of the pressure reducing valve can self-digest the corresponding damage through system operation, or whether a new balance can be established after damage, thus effectively improving the robustness of the pressure reducing valve control system.

[0124] Example α3:

[0125] Regulating and Model Verification of Pressure Reducing Valves in Industrial Water Supply Networks

[0126] System Settings:

[0127] Pressure reducing valve groups: Group A (A1, A2), Group B (B1, B2)

[0128] Adjustment model: Predict the pressure-time curve after adjustment

[0129] Error range: ±0.01 MPa / s (minimum threshold 0.02 MPa / s, maximum threshold 0.1 MPa / s)

[0130] Scenario: Comparison between the adjustment process of Valve A1 and the model

[0131] Console instruction: Require A1 to reduce the pipeline pressure from 0.8 MPa to 0.6 MPa.

[0132] Adjustment model simulation:

[0133] Simulation process (unit time 1 s):

[0134] 1st second: The pressure drops to 0.75 MPa (ΔP = 0.05 MPa / s)

[0135] 2nd second: The pressure drops to 0.7 MPa (ΔP = 0.05 MPa / s)

[0136] 3rd second: The pressure drops to 0.65 MPa (ΔP = 0.05 MPa / s)

[0137] 4th second: The pressure drops to 0.6 MPa (ΔP = 0.05 MPa / s)

[0138] Simulation result: The pressure stabilizes at 0.6 MPa after 4 seconds.

[0139] Actual adjustment and comparison:

[0140] Actual adjustment steps:

[0141] 1st second: The pressure drops to 0.74 MPa (ΔP = 0.06 MPa / s)

[0142] Second second: The pressure drops to 0.68 MPa (ΔP = 0.06 MPa / s)

[0143] Third second: The pressure drops to 0.63 MPa (ΔP = 0.05 MPa / s)

[0144] Fourth second: The pressure drops to 0.6 MPa (ΔP = 0.03 MPa / s)

[0145] Comparative analysis:

[0146] First - second second: ΔP = 0.06 MPa / s (within the error range of ±0.01, but close to the upper limit).

[0147] Fourth second: ΔP = 0.03 MPa / s (lower than the simulated value of 0.05 MPa / s, but still higher than the minimum threshold of 0.02 MPa / s).

[0148] Judgment:

[0149] A1 is in a stable state as a whole (all adjustment steps are within the error range).

[0150] Embodiment β3:

[0151] Dynamic regulation and abnormal detection of natural gas transmission and distribution stations

[0152] System settings:

[0153] Pressure reducing valve group: Group X (X1, X2, X3), Group Y (Y1, Y2)

[0154] Regulation model: Prediction model based on flow - pressure coupling

[0155] Error range: ±1 m 3 / min / s (minimum threshold 2 m 3 / min / s, maximum threshold 8 m 3 / min / s)

[0156] Scenario: Comparison between the adjustment process of valve X1 and the model

[0157] Console instruction: Require X1 to reduce the flow rate from 100 m 3 / min to 80 m 3 / min.

[0158] Regulation model simulation:

[0159] Simulation process (unit time 1 s):

[0160] First second: The flow rate drops to 92 m 3 / min (ΔQ = 8 m 3 / min / s)

[0161] Second 2: Flow rate drops to 86 m 3 / min (ΔQ = 6 m 3 / min / s)

[0162] Second 3: Flow rate drops to 82 m 3 / min (ΔQ = 4 m 3 / min / s)

[0163] Second 4: Flow rate drops to 80 m 3 / min (ΔQ = 2 m 3 / min / s)

[0164] Simulation result: Flow rate stabilizes at 80 m 3 / min after 4 seconds.

[0165] Actual adjustment and comparison:

[0166] Actual adjustment pace:

[0167] Second 1: Flow rate drops to 90 m 3 / min (ΔQ = 10 m 3 / min / s)

[0168] Second 2: Flow rate drops to 83 m 3 / min (ΔQ = 7 m 3 / min / s)

[0169] Second 3: Flow rate drops to 79 m 3 / min (ΔQ = 4 m 3 / min / s)

[0170] Second 4: Flow rate rebounds to 82 m 3 / min (ΔQ = -3 m 3 / min / s)

[0171] Comparison and analysis:

[0172] Second 1: ΔQ = 10 m 3 / min / s (> maximum threshold 8 m 3 / min / s) → Increment anomaly, possible seal aging.

[0173] Second 4: ΔQ = -3 m 3 / min / s (reverse change, outside error range) → Unstable state.

[0174] Judgment:

[0175] X1 is in an unstable state, marked as "aging pressure reducing valve" on the console, switch to X2 adjustment.

[0176] Specifically, the console responds that the pressure reducing valve is in an unstable state, and determines the abnormal state of the pressure reducing valve according to the adjustment result.

[0177] If the adjustment result is not less than the target adjustment range, the console determines that the pressure reducing valve is in an increment anomaly.

[0178] If the adjustment result is not greater than the target adjustment range, the console determines that the pressure reducing valve is in a decrement anomaly.

[0179] Specifically, if the adjustment result is within the target adjustment range compared to the state when the pipeline to be adjusted is completed, the console determines that the pressure reducing valve is in a running-in state, and updates the adjustment model according to the adjustment step in the next adjustment cycle.

[0180] The target adjustment range is the parameter interval where the parameters corresponding to the adjustment instruction are located.

[0181] Specifically, for a single pressure reducing valve, if the console determines that the pressure reducing valve is a fatigued pressure reducing valve, the console extends the adjustment cycle of the pressure reducing valve.

[0182] Among them, extending the adjustment cycle of the pressure reducing valve means adjusting and extending the unit time of the pipeline corresponding to the fatigued pressure reducing valve by at least 50%, and monitoring according to the adjustment model.

[0183] Specifically, for a single pressure reducing valve, if the console determines that the pressure reducing valve is an aging pressure reducing valve, the console determines to close the pipeline corresponding to the pressure reducing valve.

[0184] By determining the damage of the pressure reducing valve and giving an early warning for the damaged pressure reducing valve, at the same time, using other pressure reducing valves set in the same group to replace the damaged pressure reducing valve, it effectively avoids the overall system from being unable to operate due to replacing the pressure reducing valve, and effectively improves the reliability of the system.

[0185] For the industrial water supply network in scenario α, the corresponding determination and processing of the pressure reducing valve status are as follows:

[0186] Target adjustment range: The pressure drops from 0.8 MPa to 0.6 ± 0.02 MPa (i.e., 0.58 - 0.62 MPa).

[0187] Adjustment model: PID control, expected to complete adjustment in 4 seconds.

[0188] Example α4: Valve A1 is in an increment anomaly (aging pressure reducing valve) after adjustment

[0189] Console instruction: Adjust the pressure of A1 to 0.6 MPa.

[0190] Actual adjustment result:

[0191] At the 4th second, the pressure drops to 0.55 MPa (<0.58 MPa, lower than the target range).

[0192] Adjustment pace: ΔP = 0.06 MPa / s (continuously on the high side, close to the maximum threshold of 0.1 MPa / s).

[0193] Judgment logic:

[0194] Adjustment result < target lower limit → abnormal reduction.

[0195] However, if the adjustment pace is continuously too fast → actually a seal leak (aging pressure reducing valve).

[0196] Console actions:

[0197] Close the pipeline corresponding to A1 and switch to the A2 valve for adjustment.

[0198] Record A1 as an aging valve and trigger a maintenance alarm.

[0199] Example α5: The B1 valve is in the running-in state after adjustment

[0200] Console instruction: Adjust the pressure of B1 to 0.6 MPa.

[0201] Actual adjustment result:

[0202] At the 4th second, the pressure stabilizes at 0.61 MPa (within the target range of 0.58 - 0.62 MPa).

[0203] Adjustment pace: ΔP = 0.04 ± 0.01 MPa / s (in line with the model expectation).

[0204] Judgment logic:

[0205] The result is within the target range → running-in state.

[0206] Console actions:

[0207] Update the adjustment model and fine-tune the model parameters to match the actual pace.

[0208] Continue to use B1 as the main regulating valve.

[0209] For the natural gas transmission and distribution station in scenario β, the periodic adjustment of its corresponding fatigue pressure reducing valve

[0210] Example β4:

[0211] Target adjustment range: The flow rate decreases from 100 m 3 / min to 80 ± 2 m 3 / min (i.e., 78 - 82 m 3 / min).

[0212] Fatigue valve determination condition: The adjustment pace is continuously < 2 m 3 / min / s (the lowest threshold).

[0213] Determination: After the adjustment of the X2 valve, it is determined to be a fatigue pressure reducing valve

[0214] Console instruction: The X2 adjusts the flow rate to 80m 3 / min.

[0215] Actual adjustment result:

[0216] The flow rate drops to 83m at the 6th second 3 / min (within the target range).

[0217] Adjustment step: ΔQ = 1.5m 3 / min / s (continuously < 2m 3 / min / s, abnormal reduction).

[0218] Determination logic:

[0219] The result is within the target range → not aging.

[0220] However, if the adjustment step continues to be too low → fatigue of the elastic component.

[0221] Console action:

[0222] Prolong the adjustment cycle: The original unit time is 1 second → adjusted to 1.5 seconds (extended by 50%).

[0223] Adjust slowly according to the corrected cycle to avoid further wear.

[0224] Mark X2 as a low-priority valve and give priority to using X1 / X3.

[0225] Specifically, for the corresponding pressure reducing valve determined to be a fatigue pressure reducing valve or an aging pressure reducing valve within any determination range, the console determines to give an injury alarm for this pressure reducing valve.

[0226] By warning about the damaged pressure reducing valve in advance, the pressure reducing valve entering the fatigue state is warned in advance. While avoiding pipeline damage caused by the damage of the pressure reducing valve, it provides sufficient maintenance time for the pipeline where the pressure reducing valve is located, thereby further improving the reliability of the system.

[0227] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0228] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention; for those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A regulating control system based on a pressure reducing valve, which is composed of several pressure reducing valves, several actuators, several collectors and a console. It is characterized in that for the same pipeline to be regulated, at least one group of pressure reducing valves is set, and at least two pressure reducing valves are set in one group; each pressure reducing valve is provided with an actuator that responds to the regulation of the console, so as to adjust the operating parameters of the pressure reducing valve when the console issues a regulation instruction; several collectors corresponding to the pressure reducing valves are arranged on the corresponding pipelines of each pressure reducing valve, so as to collect the pressure, flow rate and regulation pace of the pipeline corresponding to the pressure reducing valve; each actuator and each collector are connected to the console, so as to collect pipeline information and respond to the instructions of the console to control the corresponding pressure reducing valve and / or other valve components; the console responds to the parameters of the pressure and flow rate to adjust the parameters of the corresponding pressure reducing valve; the console responds to the parameters of the regulation pace to adjust the parameters of the remaining pressure reducing valves in the corresponding pressure reducing valve; wherein, the regulation pace is the change amount of the pressure or flow rate collected by the collector per unit time when the actuator adjusts the corresponding pressure reducing valve.

2. The regulating control system based on a pressure reducing valve according to claim 1, characterized in that, the console responds to the abnormal decrease of the regulation pace and determines the corresponding pressure reducing valve as a fatigued pressure reducing valve; the console responds to the abnormal increase of the regulation pace and determines the corresponding pressure reducing valve as an aged pressure reducing valve; the abnormal decrease is that the regulation pace is lower than the minimum regulation pace threshold, and the abnormal increase is that the regulation pace is higher than the maximum regulation pace threshold; the minimum regulation pace threshold is related to the elastic component of the pressure reducing valve; the maximum regulation pace threshold is related to the sealing component of the pressure reducing valve.

3. The regulating control system based on a pressure reducing valve according to claim 2, characterized in that, the console is also provided with a regulation model associated with the pressure reducing valve group, the regulation model responds to the instructions issued by the console to each actuator, simulates the regulation process and regulation result, and generates the corresponding simulation process and simulation result; wherein, the simulation result is the corresponding pipeline state that can be achieved when the pressure reducing valve completes the adjustment, and the simulation process is the corresponding pipeline state of several cycles from the start of adjustment to the simulation result with the unit time as the period.

4. The regulating control system based on a pressure reducing valve according to claim 3, characterized in that, For a single regulation, the console adjusts each pressure reducing valve on the pipeline to be regulated according to the regulation process, records the corresponding regulation paces, and at the same time, compares the regulation pace with the regulation process, if the change amount of the regulation pace at any point is not greater than the error range of the corresponding change amount of the regulation process, the console determines that the pressure reducing valve is in a stable state; if the change amount of the regulation pace at any point is greater than the error range of the corresponding change amount of the regulation process, the console determines that the pressure reducing valve is in an unstable state; the error range is the corresponding change degree of the curve of the regulation pace or the curve of the regulation process, and its upper limit is not higher than the maximum regulation pace threshold, and the lower limit is not lower than the minimum regulation pace threshold.

5. The regulating control system based on a pressure reducing valve according to claim 4, wherein the console responds to the pressure reducing valve being in the stable state, compares the regulation result with the corresponding state when the pipeline to be regulated is completed, and adjusts the regulation model according to the comparison result.

6. The regulating control system based on a pressure reducing valve according to claim 4, characterized in that, The console responds that the pressure reducing valve is in the unstable state, and determines the abnormal state of the pressure reducing valve according to the adjustment result. If the adjustment result is not less than the target adjustment range, the console determines that the pressure reducing valve is in the increment abnormality. If the adjustment result is not greater than the target adjustment range, the console determines that the pressure reducing valve is in the decrement abnormality.

7. The regulating control system based on a pressure reducing valve according to claim 5 or 6, characterized in that, If the adjustment result and the state of the pipeline to be adjusted when the adjustment is completed are within the target adjustment range, the console determines that the pressure reducing valve is in the running-in state, and updates the adjustment model according to the adjustment step in the next adjustment cycle. The target adjustment range is the parameter interval where the parameters corresponding to the adjustment instruction are located.

8. The regulating control system based on a pressure reducing valve according to claim 7, wherein For a single pressure reducing valve, if the console determines that the pressure reducing valve is a fatigued pressure reducing valve, the console extends the adjustment cycle of the pressure reducing valve. Among them, extending the adjustment cycle of the pressure reducing valve means adjusting and extending the unit time of the pipeline corresponding to the fatigued pressure reducing valve by at least 50%, and monitoring according to the adjustment model.

9. The regulating control system based on a pressure reducing valve according to claim 7, wherein For a single pressure reducing valve, if the console determines that the pressure reducing valve is an aged pressure reducing valve, the console determines to close the pipeline corresponding to the pressure reducing valve.

10. The regulating control system based on a pressure reducing valve according to claim 6 or 8 or 9, characterized in that, For the corresponding pressure reducing valve determined as a fatigued pressure reducing valve or an aged pressure reducing valve within any determination range, the console determines to give a damage alarm for the pressure reducing valve.

Images