Linear multi-stage valve closing system for reducing water hammer effect and control method

Abstract

The invention discloses a linear multi-stage valve closing system for reducing a water hammer effect and a control method. The valve closing system comprises a controller module, a pipeline pressure monitoring module, a valve closing actuator module, a first-stage linear valve closing module, a second-stage linear valve closing module, a fault diagnosis module, a flow monitoring module and a user interface module, the pipeline pressure monitoring module, the fault diagnosis module, the user interface module, the flow monitoring module and the valve closing actuator module are all connected with the controller module. Through the arrangement of the first-stage linear valve closing module and the second-stage linear valve closing module, a proper valve closing mode can be selected according to the actual operation condition of a pipeline and different valve closing strategies, so that the water hammer suppression requirements under different pipeline pressure environments are met, the water hammer effect in a pipeline system is effectively reduced, and the water hammer suppression efficiency is improved. And through two-stage quick closing and slow closing control, the pressure impact of the valve and the pipeline is reduced, and the safety of a pipeline system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve closing systems, and in particular to a linear multi-stage valve closing system and a control method for reducing water hammer effect. Background Art

[0002] In fluid transport pipelines, rapid valve closing is often accompanied by severe water hammer effect, resulting in severe pressure fluctuations in the pipeline system, which can easily cause pipeline rupture, valve damage and other system failures. The current valve closing technology is mainly single-stage linear valve closing, which is difficult to effectively control water hammer, and has a complex structure and high maintenance cost. A single fast closing or slow closing method often cannot take into account both flow control and water hammer suppression. For this reason, the present application proposes a linear multi-stage valve closing system and control method for reducing the water hammer effect. Summary of the invention

[0003] Based on the technical problems existing in the background technology, the present invention proposes a linear multi-stage valve closing system and a control method for reducing the water hammer effect.

[0004] The present invention proposes a linear multi-stage valve closing system for reducing water hammer effect, comprising a controller module, a pipeline pressure monitoring module installed on a pipeline system, a valve closing actuator module, a first-stage linear valve closing module, a second-stage linear valve closing module, a fault diagnosis module, a flow monitoring module and a user interface module. The pipeline pressure monitoring module, the fault diagnosis module, the user interface module, the flow monitoring module and the valve closing actuator module are all connected to the controller module, the first-stage linear valve closing module and the second-stage linear valve closing module are both connected to the valve closing actuator module, and the first-stage linear valve closing module and the second-stage linear valve closing module are both installed on the pipeline system.

[0005] Preferably, the controller module is used to control the operation of the valve closing system, and selects a suitable valve closing mode for control according to the pipeline pressure and flow information collected by real-time data;

[0006] The pipeline pressure monitoring module is used to monitor the pressure changes in the pipeline and provide timely feedback to the controller module;

[0007] The flow monitoring module is used to monitor the change of water flow in the pipeline and feed back to the controller module in time.

[0008] Preferably, the fault diagnosis module is used to monitor and diagnose the working status of the pipeline system, and promptly feed back to the controller module, and promptly alarm when a fault is found; the user interface module is used to provide operators with a visual interface for monitoring the system operating status, setting parameters and performing operation control;

[0009] The valve closing actuator module is used to control the opening and closing of the first-stage linear valve closing module and the second-stage linear valve closing module according to the instructions of the controller module to realize different valve closing modes. The first-stage linear valve closing module is used to realize the control of linear valve closing and can be adjusted according to actual needs. The second-stage linear valve closing module includes two modes, 80% fast closing and 60% fast closing, which are used to more finely control the opening and closing speed of the valve to reduce the generation of water hammer effect.

[0010] The valve in the 80% fast closing mode quickly closes to 80% of the opening, and then closes the remaining 20% ​​of the opening at a slower linear speed. This mode is suitable for systems with large water hammer impacts, quickly reducing most of the flow, and slowly closing to reduce the remaining pressure fluctuations. The valve in the 60% fast closing module quickly closes to 60% of the opening, and then closes the remaining 40% of the opening at a slower linear speed. This mode is suitable for systems that require a longer slow closing process, making pressure fluctuation control more stable.

[0011] The present invention also proposes a control method for a linear multi-stage valve closing system for reducing water hammer effect, comprising the following steps:

[0012] S1: The pipeline pressure monitoring module continuously monitors the pressure changes of the pipeline system, while the flow monitoring module monitors the flow of the pipeline system and transmits the monitored real-time data to the controller module;

[0013] S2: After receiving the pressure and flow information of the pipeline system, the controller module analyzes the pressure and flow data and selects an appropriate valve closing mode according to the preset pressure control strategy;

[0014] S3: When one-stage linear valve closing control is required, the controller module sends a command to the valve closing actuator module, and the valve closing actuator module controls the one-stage linear valve closing module to open or close according to the linear valve closing mode;

[0015] S4: When two-stage linear valve closing control is required, the controller module selects 80% fast closing or 60% fast closing mode according to the specific situation and sends the corresponding instruction to the valve closing actuator module;

[0016] S5: The valve closing actuator module controls the two-stage linear valve closing module to open and close the valve according to the instruction of the controller module to realize the corresponding valve closing mode;

[0017] S6: The controller module continuously monitors the pressure and flow changes of the pipeline system and adjusts the valve closing control strategy in real time to maintain the stable operation of the pipeline system and reduce the occurrence of water hammer effect.

[0018] Preferably, the specific logical steps of S2 are as follows:

[0019] S201: The controller module analyzes the received pressure data, including the real-time pressure value, pressure fluctuation and pressure change speed, and compares these data with the set pressure threshold. The controller module can determine whether the pipeline system is in a normal operating state and whether there is an abnormal pressure situation, including a sudden increase in pressure or a sudden decrease in pressure.

[0020] S202: The controller module analyzes the received flow data, including the real-time flow value, flow fluctuation and flow change speed. By analyzing the flow data, the controller can understand the flow situation of the pipeline system, and at the same time, based on the flow threshold, determine whether there is a situation where the flow is too large or too small, and whether it is necessary to adjust the valve closing mode to control the flow change;

[0021] S203: The controller module comprehensively considers the pressure and flow conditions of the pipeline system according to the analysis results of S201 and S202, and combines the preset control strategy to determine whether valve closing control is currently required to adjust the operating status of the pipeline system.

[0022] Preferably, in S203, the preset control strategy is as follows:

[0023] (1) When the pressure fluctuation of the pipeline system is small and the pressure change is relatively stable, select the one-stage linear valve closing mode. This mode has a relatively gentle opening and closing speed when closing the valve. It is suitable for scenes where the pressure requirements are not particularly strict and can effectively reduce the occurrence of water hammer effect;

[0024] (2) When the pressure of the pipeline system suddenly increases or decreases, and the pressure fluctuation is more severe, select the 80% fast closing mode. This mode will quickly close or open the valve to quickly adjust the pressure of the pipeline system, prevent the pressure from exceeding the safety range, and reduce the occurrence of water hammer effect;

[0025] (3) When you need to control the pressure fluctuation of the pipeline system more quickly and precisely, you can choose the 60% fast closing mode. This mode is faster than the 80% fast closing mode, but it is also more likely to cause larger pressure changes;

[0026] (4) The flow fluctuation is small, and the one-stage linear valve closing mode can be maintained;

[0027] (5) If the flow rate fluctuates greatly, you can select 80% fast closing or 60% fast closing mode for quick adjustment.

[0028] Preferably, in said S5, the program code used when sending the corresponding instruction to the valve closing actuator module is as follows:

[0029] #Define a function to send instructions to the valve closing actuator module

[0030] def send_command_to_actuator(command):

[0031] #Here is the code to send instructions to the valve closing actuator module through the communication interface

[0032] #Simulate the process of sending instructions

[0033] print("Sending command to actuator:",command)

[0034] #Main program

[0035] def main():

[0036] #Choose 80% fast closing or 60% fast closing mode according to the specific situation

[0037] mode = "80% quick close" # can be adjusted to "60% quick close" etc. according to actual situation

[0038] #Create corresponding control instructions

[0039] if mode=="80%quick close":

[0040] command="Close valve at 80% quick speed"

[0041] elif mode=="60% quick close":

[0042] command="Close valve at 60% quick speed"

[0043] #Send instructions to the valve closing actuator module

[0044] send_command_to_actuator(command)

[0045] #Execute the main program

[0046] main().

[0047] Preferably, when the valve closing actuator module controls the first-stage linear valve closing module and the second-stage linear valve closing module, the valve closing actuator module will send an opening or closing signal to the actuator, and the actuator controls the opening or closing operation of the first-stage linear valve closing module or the second-stage linear valve closing module.

[0048] Preferably, in S6, while the controller module continuously monitors the pressure and flow of the pipeline system, the fault diagnosis module continuously monitors the working state of the pipeline system, and the specific steps of the fault diagnosis module monitoring are as follows:

[0049] S601: The fault diagnosis module first needs to obtain real-time data from the controller module, including pressure and flow rate, information of the pipeline system, and the working status and electrical signal of the valve closing actuator;

[0050] S602: The fault diagnosis module processes and analyzes the received data, compares the actual data with the set threshold or working range, and detects whether the data is within the normal range;

[0051] S603: Based on the results of data analysis, the fault diagnosis module identifies possible fault types, such as abnormal pressure in the pipeline system and abnormal valve closing actuator;

[0052] S604: When the fault diagnosis module detects a potential fault, it will automatically trigger the alarm mechanism and send an alarm signal to the controller module. At the same time, it will generate detailed information to indicate the specific fault type and location, and notify the operator of the detailed information through the user interface module so that the fault can be handled in time.

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] The present invention can select a suitable valve closing mode according to the actual operation conditions of the pipeline and different valve closing strategies through the setting of a one-stage linear valve closing module and a two-stage linear valve closing module, so as to meet the water hammer suppression requirements under different pipeline pressure environments, effectively reduce the water hammer effect in the pipeline system, and reduce the pressure shock of valves and pipelines through two-stage fast closing and slow closing control, thereby improving the safety of the pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 A block diagram of a linear multi-stage valve closing system for reducing water hammer effect proposed by the present invention;

[0056] Figure 2 The present invention is a flow chart of a control method for a linear multi-stage valve closing system for reducing water hammer effect. DETAILED DESCRIPTION

[0057] The present invention will be further explained below in conjunction with specific embodiments.

[0058] Example

[0059] Reference Figure 1-2, this embodiment proposes a linear multi-stage valve closing system for reducing water hammer effect, including a controller module, a pipeline pressure monitoring module installed on a pipeline system, a valve closing actuator module, a first-stage linear valve closing module, a second-stage linear valve closing module, a fault diagnosis module, a flow monitoring module and a user interface module, the pipeline pressure monitoring module, the fault diagnosis module, the user interface module, the flow monitoring module and the valve closing actuator module are all connected to the controller module, the first-stage linear valve closing module and the second-stage linear valve closing module are both connected to the valve closing actuator module, and the first-stage linear valve closing module and the second-stage linear valve closing module are both installed on the pipeline system;

[0060] The controller module is used to control the operation of the valve closing system and select the appropriate valve closing mode for control according to the pipeline pressure and flow information collected by real-time data;

[0061] The pipeline pressure monitoring module is used to monitor the pressure changes in the pipeline and provide timely feedback to the controller module;

[0062] The flow monitoring module is used to monitor the water flow changes in the pipeline and provide timely feedback to the controller module;

[0063] The fault diagnosis module is used to monitor and diagnose the working status of the pipeline system, and promptly feed back to the controller module, and promptly alarm when a fault is found; the user interface module is used to provide operators with a visual interface for monitoring the system operating status, setting parameters, and performing operational control;

[0064] The valve closing actuator module is used to control the opening and closing of the first-stage linear valve closing module and the second-stage linear valve closing module according to the instructions of the controller module to realize different valve closing modes. The first-stage linear valve closing module is used to realize the control of linear valve closing and can be adjusted according to actual needs. The second-stage linear valve closing module includes two modes: 80% fast closing and 60% fast closing, which are used to more finely control the opening and closing speed of the valve to reduce the generation of water hammer effect;

[0065] The valve in the 80% fast closing mode quickly closes to 80% of the opening, and then closes the remaining 20% ​​of the opening at a slower linear speed. This mode is suitable for systems with large water hammer impacts, quickly reducing most of the flow, and slowly closing to reduce the remaining pressure fluctuations. The valve in the 60% fast closing module quickly closes to 60% of the opening, and then closes the remaining 40% of the opening at a slower linear speed. This mode is suitable for systems that require a longer slow closing process, making pressure fluctuation control more stable.

[0066] This embodiment also proposes a control method for a linear multi-stage valve closing system for reducing water hammer effect, comprising the following steps:

[0067] S1: The pipeline pressure monitoring module continuously monitors the pressure changes of the pipeline system, while the flow monitoring module monitors the flow of the pipeline system and transmits the monitored real-time data to the controller module;

[0068] S2: After receiving the pressure and flow information of the pipeline system, the controller module analyzes the pressure and flow data and selects an appropriate valve closing mode according to the preset pressure control strategy;

[0069] The specific logical steps are as follows:

[0070] S201: The controller module analyzes the received pressure data, including the real-time pressure value, pressure fluctuation and pressure change speed, and compares these data with the set pressure threshold. The controller module can determine whether the pipeline system is in a normal operating state and whether there is an abnormal pressure situation, including a sudden increase in pressure or a sudden decrease in pressure.

[0071] S202: The controller module analyzes the received flow data, including the real-time flow value, flow fluctuation and flow change speed. By analyzing the flow data, the controller can understand the flow situation of the pipeline system, and at the same time, based on the flow threshold, determine whether there is a situation where the flow is too large or too small, and whether it is necessary to adjust the valve closing mode to control the flow change;

[0072] S203: The controller module comprehensively considers the pressure and flow of the pipeline system according to the results of the analysis in S201 and S202, and combines the preset control strategy to determine whether valve closing control is currently required to adjust the operating state of the pipeline system;

[0073] The preset control strategy is as follows:

[0074] (1) When the pressure fluctuation of the pipeline system is small and the pressure change is relatively stable, select the one-stage linear valve closing mode. This mode has a relatively gentle opening and closing speed when closing the valve. It is suitable for scenes where the pressure requirements are not particularly strict and can effectively reduce the occurrence of water hammer effect;

[0075] (2) When the pressure of the pipeline system suddenly increases or decreases, and the pressure fluctuation is more severe, select the 80% fast closing mode. This mode will quickly close or open the valve to quickly adjust the pressure of the pipeline system, prevent the pressure from exceeding the safety range, and reduce the occurrence of water hammer effect;

[0076] (3) When you need to control the pressure fluctuation of the pipeline system more quickly and precisely, you can choose the 60% fast closing mode. This mode is faster than the 80% fast closing mode, but it is also more likely to cause larger pressure changes;

[0077] (4) The flow fluctuation is small, and the one-stage linear valve closing mode can be maintained;

[0078] (5) If the flow rate fluctuates greatly, you can choose 80% fast closing or 60% fast closing mode for quick adjustment;

[0079] S3: When one-stage linear valve closing control is required, the controller module sends a command to the valve closing actuator module, and the valve closing actuator module controls the one-stage linear valve closing module to open or close according to the linear valve closing mode;

[0080] S4: When two-stage linear valve closing control is required, the controller module selects 80% fast closing or 60% fast closing mode according to the specific situation and sends the corresponding instruction to the valve closing actuator module;

[0081] S5: The valve closing actuator module controls the two-stage linear valve closing module to open and close the valve according to the instruction of the controller module to realize the corresponding valve closing mode;

[0082] The program code used to send the corresponding command to the valve closing actuator module is as follows:

[0083] #Define a function to send instructions to the valve closing actuator module

[0084] def send_command_to_actuator(command):

[0085] #Here is the code to send instructions to the valve closing actuator module through the communication interface

[0086] #Simulate the process of sending instructions

[0087] print("Sending command to actuator:",command)

[0088] #Main program

[0089] def main():

[0090] #Choose 80% fast closing or 60% fast closing mode according to the specific situation

[0091] mode = "80% quick close" # can be adjusted to "60% quick close" etc. according to actual situation

[0092] #Create corresponding control instructions

[0093] if mode=="80%quick close":

[0094] command="Close valve at 80% quick speed"

[0095] elif mode=="60% quick close":

[0096] command="Close valve at 60% quick speed"

[0097] #Send instructions to the valve closing actuator module

[0098] send_command_to_actuator(command)

[0099] #Execute the main program

[0100] main();

[0101] In addition, when the valve closing actuator module controls the first-stage linear valve closing module and the second-stage linear valve closing module, the valve closing actuator module will send an opening or closing signal to the actuator, and the actuator controls the opening or closing operation of the first-stage linear valve closing module or the second-stage linear valve closing module;

[0102] S6: The controller module continuously monitors the pressure and flow changes of the pipeline system and adjusts the valve closing control strategy in real time to maintain the stable operation of the pipeline system and reduce the occurrence of water hammer effect;

[0103] In the process of the controller module continuously monitoring the pressure and flow of the pipeline system, the fault diagnosis module will continuously monitor the working status of the pipeline system. The specific steps of the fault diagnosis module monitoring are as follows:

[0104] S601: The fault diagnosis module first needs to obtain real-time data from the controller module, including pressure and flow rate, information of the pipeline system, and the working status and electrical signal of the valve closing actuator;

[0105] S602: The fault diagnosis module processes and analyzes the received data, compares the actual data with the set threshold or working range, and detects whether the data is within the normal range;

[0106] S603: Based on the results of data analysis, the fault diagnosis module identifies possible fault types, such as abnormal pressure in the pipeline system and abnormal valve closing actuator;

[0107] S604: When the fault diagnosis module detects a potential fault, it automatically triggers an alarm mechanism and sends an alarm signal to the controller module, while generating detailed information to indicate the specific fault type and location, and notifying the operator of the detailed information through the user interface module so that the fault can be handled in a timely manner;

[0108] The detailed information includes the fault type (overpressure, underpressure, actuator failure), fault time, pressure and flow data, and recommended emergency treatment methods;

[0109] This embodiment can select a suitable valve closing mode according to the actual operation conditions of the pipeline and different valve closing strategies through the setting of a one-stage linear valve closing module and a two-stage linear valve closing module, so as to meet the water hammer suppression requirements under different pipeline pressure environments, effectively reduce the water hammer effect in the pipeline system, and reduce the pressure shock of valves and pipelines through two-stage fast closing and slow closing control, thereby improving the safety of the pipeline system.

[0110] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A linear multi-stage valve closing system for reducing water hammer effect, characterized in that: It includes a controller module, a pipeline pressure monitoring module installed on the pipeline system, a valve closing actuator module, a first-stage linear valve closing module, a second-stage linear valve closing module, a fault diagnosis module, a flow monitoring module and a user interface module. The pipeline pressure monitoring module, the fault diagnosis module, the user interface module, the flow monitoring module and the valve closing actuator module are all connected to the controller module, the first-stage linear valve closing module and the second-stage linear valve closing module are both connected to the valve closing actuator module, and the first-stage linear valve closing module and the second-stage linear valve closing module are both installed on the pipeline system.

2. A linear multi-stage valve closing system for reducing water hammer effect according to claim 1, characterized in that: The controller module is used to control the operation of the valve closing system, and selects an appropriate valve closing mode for control according to the pipeline pressure and flow information collected by real-time data; The pipeline pressure monitoring module is used to monitor the pressure changes in the pipeline and provide timely feedback to the controller module; The flow monitoring module is used to monitor the change of water flow in the pipeline and feed back to the controller module in time.

3. A linear multi-stage valve closing system for reducing water hammer effect according to claim 1, characterized in that: The fault diagnosis module is used to monitor and diagnose the working status of the pipeline system, and promptly feedback to the controller module, and promptly alarm when a fault is found; the user interface module is used to provide operators with a visual interface for monitoring the system operating status, setting parameters and performing operation control; The valve closing actuator module is used to control the opening and closing of the first-stage linear valve closing module and the second-stage linear valve closing module according to the instructions of the controller module to realize different valve closing modes. The first-stage linear valve closing module is used to realize the control of linear valve closing and can be adjusted according to actual needs. The second-stage linear valve closing module includes two modes, 80% fast closing and 60% fast closing, which are used to more finely control the opening and closing speed of the valve to reduce the generation of water hammer effect. The valve in the 80% fast closing mode quickly closes to 80% of the opening, and then closes the remaining 20% ​​of the opening at a slower linear speed. This mode is suitable for systems with large water hammer impacts, quickly reducing most of the flow, and slowly closing to reduce the remaining pressure fluctuations. The valve in the 60% fast closing module quickly closes to 60% of the opening, and then closes the remaining 40% of the opening at a slower linear speed. This mode is suitable for systems that require a longer slow closing process, making pressure fluctuation control more stable.

4. A control method for a linear multi-stage valve closing system for reducing water hammer effect, characterized in that: The following steps are involved: S1: The pipeline pressure monitoring module continuously monitors the pressure changes of the pipeline system, while the flow monitoring module monitors the flow of the pipeline system and transmits the monitored real-time data to the controller module; S2: After receiving the pressure and flow information of the pipeline system, the controller module analyzes the pressure and flow data and selects an appropriate valve closing mode according to the preset pressure control strategy; S3: When one-stage linear valve closing control is required, the controller module sends a command to the valve closing actuator module, and the valve closing actuator module controls the one-stage linear valve closing module to open or close according to the linear valve closing mode; S4: When two-stage linear valve closing control is required, the controller module selects 80% fast closing or 60% fast closing mode according to the specific situation and sends the corresponding instruction to the valve closing actuator module; S5: The valve closing actuator module controls the two-stage linear valve closing module to open and close the valve according to the instruction of the controller module to realize the corresponding valve closing mode; S6: The controller module continuously monitors the pressure and flow changes of the pipeline system and adjusts the valve closing control strategy in real time to maintain the stable operation of the pipeline system and reduce the occurrence of water hammer effect.

5. A control method for a linear multi-stage valve closing system for reducing water hammer effect according to claim 4, characterized in that: The specific logical steps of S2 are as follows: S201: The controller module analyzes the received pressure data, including the real-time pressure value, pressure fluctuation and pressure change speed, and compares these data with the set pressure threshold. The controller module can determine whether the pipeline system is in a normal operating state and whether there is an abnormal pressure situation, including a sudden increase in pressure or a sudden decrease in pressure. S202: The controller module analyzes the received flow data, including the real-time flow value, flow fluctuation and flow change speed. By analyzing the flow data, the controller can understand the flow situation of the pipeline system, and at the same time, based on the flow threshold, determine whether there is a situation where the flow is too large or too small, and whether it is necessary to adjust the valve closing mode to control the flow change; S203: The controller module comprehensively considers the pressure and flow conditions of the pipeline system according to the analysis results of S201 and S202, and combines the preset control strategy to determine whether valve closing control is currently required to adjust the operating status of the pipeline system.

6. A control method for a linear multi-stage valve closing system for reducing water hammer effect according to claim 5, characterized in that: In S203, the preset control strategy is as follows: (1) When the pressure fluctuation of the pipeline system is small and the pressure change is relatively stable, select the one-stage linear valve closing mode. This mode has a relatively gentle opening and closing speed when closing the valve. It is suitable for scenes where the pressure requirements are not particularly strict and can effectively reduce the occurrence of water hammer effect; (2) When the pressure of the pipeline system suddenly increases or decreases, and the pressure fluctuation is more severe, select the 80% fast closing mode. This mode will quickly close or open the valve to quickly adjust the pressure of the pipeline system, prevent the pressure from exceeding the safety range, and reduce the occurrence of water hammer effect; (3) When you need to control the pressure fluctuation of the pipeline system more quickly and precisely, you can choose the 60% fast closing mode. This mode is faster than the 80% fast closing mode, but it is also more likely to cause larger pressure changes; (4) The flow fluctuation is small, and the one-stage linear valve closing mode can be maintained; (5) If the flow rate fluctuates greatly, you can select 80% fast closing or 60% fast closing mode for quick adjustment.

7. A control method for a linear multi-stage valve closing system for reducing water hammer effect according to claim 4, characterized in that: In S5, the program code used when sending the corresponding instruction to the valve closing actuator module is as follows: #Define a function to send commands to the valve closing actuator module def send_command_to_actuator(command): #Here is the code to send instructions to the valve closing actuator module through the communication interface #Simulate the process of sending instructions print("Sending command to actuator:",command) #Main program def main(): #Choose 80% fast closing or 60% fast closing mode according to the specific situation mode = "80% quick close" # can be adjusted to "60% quick close" according to actual conditions #Create corresponding control instructions if mode=="80%quick close": command="Close valve at 80% quick speed" elif mode=="60% quick close": command="Close valve at 60% quick speed" #Send instructions to the valve closing actuator module send_command_to_actuator(command) #Execute the main program main().

8. The control method of a linear multi-stage valve closing system for reducing water hammer effect according to claim 4, characterized in that: When the valve closing actuator module controls the one-stage linear valve closing module and the two-stage linear valve closing module, the valve closing actuator module sends an opening or closing signal to the actuator, and the actuator controls the opening or closing operation of the one-stage linear valve closing module or the two-stage linear valve closing module.

9. The control method of a linear multi-stage valve closing system for reducing water hammer effect according to claim 4, characterized in that: In S6, while the controller module continuously monitors the pressure and flow of the pipeline system, the fault diagnosis module continuously monitors the working state of the pipeline system. The specific steps of the fault diagnosis module monitoring are as follows: S601: The fault diagnosis module first needs to obtain real-time data from the controller module, including pressure and flow rate, information of the pipeline system, and the working status and electrical signal of the valve closing actuator; S602: The fault diagnosis module processes and analyzes the received data, compares the actual data with the set threshold or working range, and detects whether the data is within the normal range; S603: Based on the results of data analysis, the fault diagnosis module identifies possible fault types, such as abnormal pressure in the pipeline system and abnormal valve closing actuator; S604: When the fault diagnosis module detects a potential fault, it will automatically trigger the alarm mechanism and send an alarm signal to the controller module. At the same time, it will generate detailed information to indicate the specific fault type and location, and notify the operator of the detailed information through the user interface module so that the fault can be handled in time.

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