Automatic control method and system of pipeline valve based on pressure monitoring

Abstract

The invention discloses an automatic control method and system for a pipeline valve based on pressure monitoring, and the method comprises the steps: setting a preset threshold value of the pressure of a to-be-detected pipeline, obtaining a real-time pressure value of the to-be-detected pipeline, comparing the real-time pressure value of the to-be-detected pipeline with a preset threshold value, and determining whether the real-time pressure of the to-be-detected pipeline is within a preset threshold value range or not so as to confirm whether the pressure state of the to-be-detected pipeline is normal or not; after the pressure state of the to-be-detected pipeline is confirmed, a valve on the to-be-detected pipeline is driven to execute opening or closing operation, and an alarm mechanism is started synchronously. The pressure change in the pipeline is monitored in real time through the pressure relay, automatic closing and opening of the pipeline valve are achieved in combination with cooperative work of the electromagnetic valve, the pneumatic actuator and the main controller, energy waste and safety accidents caused by pipeline leakage are effectively reduced, and the device is suitable for various fluid pipelines such as natural gas, petroleum and water supply systems and has wide application prospects. Wide application prospects are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline transportation engineering, and in particular to an automatic control method and system for pipeline valves based on pressure monitoring. Background Art

[0002] As global energy demand continues to rise, natural gas, thanks to its clean and efficient characteristics, is becoming increasingly important in the energy mix. Long-distance natural gas pipelines, as critical infrastructure for natural gas transportation, shoulder the core mission of efficiently transporting natural gas from production sites to consumption locations. However, because these pipelines traverse complex and diverse geographical environments and operate under harsh conditions, they face significant leakage risks. Geological disasters (such as earthquakes and landslides), third-party sabotage (such as construction excavation), and inherent corrosion and aging of the pipelines can all lead to pipeline damage, resulting in natural gas leaks. Once a leak occurs, the vast area covered by the pipelines makes it difficult to quickly locate the leak point, and manual intervention is often delayed. Furthermore, the flammable and explosive nature of natural gas means that leaks not only waste energy but can also cause serious safety incidents such as fires and explosions, posing a significant threat to the surrounding environment and the safety of residents and property. Currently, most valve control systems still rely on manual operation, failing to automatically close valves in the event of a pipeline leak. This delays leak response, further exacerbating safety risks and economic losses. Therefore, there is an urgent need to develop a technology that can automatically detect pipeline pressure changes and realize valve switching control to effectively deal with pipeline leakage problems and ensure the safety and reliability of natural gas transportation. Summary of the Invention

[0003] The embodiments of the present invention provide a method and system for automatically controlling a pipeline valve based on pressure monitoring to solve the technical problems in the prior art that it is difficult to automatically detect pipeline pressure changes and cannot promptly and effectively respond to pipeline leakage.

[0004] A method for automatically controlling a pipeline valve based on pressure monitoring, comprising:

[0005] Setting a preset threshold value for the pressure of the pipeline to be tested, which includes an upper pressure limit and a lower pressure limit, and monitoring the pressure of the pipeline to be tested in real time to obtain a real-time pressure value of the pipeline to be tested;

[0006] Compare the real-time pressure value of the pipeline to be tested with the preset threshold value to determine whether the real-time pressure of the pipeline to be tested is within the preset threshold range, so as to confirm whether the pressure state of the pipeline to be tested is normal;

[0007] After confirming the pressure status of the pipeline to be tested, the valve on the pipeline to be tested is driven to perform an opening or closing operation, and the alarm mechanism is activated simultaneously to achieve real-time feedback of the pressure status of the pipeline to be tested.

[0008] The present invention also provides an automatic control system for pipeline valves based on pressure monitoring, comprising:

[0009] The threshold setting and pressure acquisition module is used to set the preset threshold value of the pipeline pressure to be tested, which includes the upper and lower pressure limits, and monitor the pressure of the pipeline to be tested in real time to obtain the real-time pressure value of the pipeline to be tested;

[0010] The pipeline pressure status judgment module is used to compare the real-time pressure value of the pipeline to be tested with a preset threshold value to determine whether the real-time pressure of the pipeline to be tested is within the preset threshold range, so as to confirm whether the pressure status of the pipeline to be tested is normal;

[0011] The valve control and alarm module is used to drive the valve on the pipeline to be tested to open or close after confirming the pressure status of the pipeline to be tested, and simultaneously activate the alarm mechanism to achieve real-time feedback of the pressure status of the pipeline to be tested.

[0012] The present invention achieves automatic control of pipeline valves and real-time protection against pipeline leaks. By using a pressure relay to monitor pressure changes within the pipeline under test in real time and collaborating with a solenoid valve, pneumatic actuator, and main controller, the pipeline valve can be automatically closed and opened. When the pipeline pressure drops below a lower limit or rises above an upper limit, the pressure relay triggers a corresponding action, energizing the solenoid valve coil, which in turn controls the airflow path of the pneumatic actuator, driving the valve stem to rotate and close or open the valve. This creates a closed-loop control system of "monitoring-determining-execution-feedback," effectively reducing energy waste caused by pipeline leaks, significantly lowering the risk of safety accidents caused by leaks, and improving the safety and reliability of the pipeline system.

[0013] In this invention, the main controller precisely controls the energization time of the solenoid valve coil, ensuring the valve can fully close or open. The valve automatically shuts off after the action is completed, saving energy and extending the life of the device. Furthermore, the inclusion of SMS alarms and wireless audio and visual alarms creates a "local + remote" dual-channel early warning mechanism, enabling remote monitoring and alarm functions. When a pipeline leak or other abnormality occurs, the system promptly sends an alarm message to personnel, enabling them to respond quickly, reducing incident handling time and improving the system's response speed and processing efficiency.

[0014] This invention, through standardized interfaces and equipment, can quickly adapt to pipeline systems in different scenarios. It has high versatility and adaptability, and is applicable to a variety of fluid pipelines, such as natural gas, oil, and water supply systems. Automated control reduces manual intervention, improves system reliability and safety, and reduces operating costs. This has significant economic and environmental benefits, providing a strong guarantee for the safe and efficient operation of fluid pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 This is a schematic diagram of an application environment of an automatic control method for a pipeline valve based on pressure monitoring in one embodiment of the present invention;

[0017] Figure 2 This is a structural diagram of an automatic control system for a pipeline valve based on pressure monitoring in one embodiment of the present invention;

[0018] Figure 3 is a structural diagram of an automatic control system for a pipeline valve based on pressure monitoring in another embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of an application environment of an automatic control method for a pipeline valve based on pressure monitoring in one embodiment of the present invention;

[0020] Figure 5 FIG. 1 is a schematic diagram of a computer device according to an embodiment of the present invention.

[0021] 1- pipeline to be tested, 2- valve, 3- pneumatic actuator, 4- pressure measuring device, 5- sound and light wireless alarm, 6- solenoid valve, 61- first control port, 62- second control port, 63- air inlet, 7- main controller, 8- accumulator. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] The embodiment of the present invention provides an automatic control method for a pipeline valve based on pressure monitoring. The automatic control method for a pipeline valve based on pressure monitoring can be applied as follows: Figure 4 Specifically, the automatic control method of the pipeline valve based on pressure monitoring is applied in the automatic control system of the pipeline valve based on pressure monitoring, and the automatic control system of the pipeline valve based on pressure monitoring includes the following: Figure 4The client and server shown communicate over a network to automatically detect pipeline pressure changes and promptly and effectively respond to leaks. The client, also known as the user end, is the program that corresponds to the server and provides local services to clients. The client can be installed on, but is not limited to, various personal computers, laptops, smartphones, tablets, and portable wearable devices. The server can be implemented as a standalone server or a server cluster consisting of multiple servers.

[0024] In one embodiment, if Figure 1 As shown, a method for automatic control of pipeline valves based on pressure monitoring is provided, which is applied in Figure 5 The server in the example is used as an example, and the steps are as follows:

[0025] S1. Set a preset threshold value for the pressure of the pipeline 1 to be tested, which includes an upper pressure limit and a lower pressure limit, and monitor the pressure of the pipeline 1 to be tested in real time to obtain a real-time pressure value of the pipeline 1 to be tested.

[0026] In one embodiment, step S1 includes the following process:

[0027] By setting a pressure measuring device 4 on the pipeline to be tested 1, the real-time pressure of the pipeline to be tested 1 is monitored in real time by using the pressure measuring device 4; a preset threshold is set according to actual on-site needs, and the upper and lower pressure limits of the preset threshold are determined; and the real-time pressure value of the pipeline to be tested 1 monitored in real time by the pressure measuring device 4 is obtained.

[0028] As can be understood, the pressure measuring device 4 collects pipeline pressure data in real time, providing dynamic monitoring capabilities for the system. The specific range of the preset threshold value can be set based on actual site requirements, specifically, based on pipeline design specifications and safety standards, the characteristics of the conveying medium, the operating environment and working conditions, safety and environmental protection requirements, and other requirements. The pressure measuring device 4 includes, but is not limited to, components that can be used to measure pipeline pressure, such as pressure relays and pressure sensors.

[0029] S2. Compare the real-time pressure value of the pipeline 1 to be tested with a preset threshold value to determine whether the real-time pressure of the pipeline 1 to be tested is within the preset threshold value range, so as to confirm whether the pressure state of the pipeline 1 to be tested is normal.

[0030] In one embodiment, step S2 further includes:

[0031] The range of the preset threshold value is determined according to the upper pressure limit value and the lower pressure limit value, and the real-time pressure value of the pipeline to be tested 1 is compared with the upper pressure limit value and the lower pressure limit value.

[0032] When it is confirmed that the real-time pressure value of the pipeline 1 to be tested is higher than the lower pressure limit, it is determined that the pressure of the pipeline 1 to be tested is normal.

[0033] When it is confirmed that the real-time pressure value of the pipeline 1 to be tested is lower than the lower pressure limit, it is determined that the pressure of the pipeline 1 to be tested is abnormal.

[0034] Understandably, by comparing the real-time pressure value of the pipeline 1 to be tested with the lower pressure limit, it is determined whether the real-time pressure value of the pipeline 1 to be tested is normal. For example, if the lower pressure limit of the preset threshold is set to 0.8 MPa, if the real-time pressure value of the pipeline 1 to be tested is lower than 0.8 MPa, the pressure of the pipeline 1 to be tested is determined to be abnormal; if the real-time pressure value of the pipeline 1 to be tested is higher than 0.8 MPa, the pressure of the pipeline 1 to be tested is determined to be normal. The lower and upper pressure limits of the preset threshold can be set as needed.

[0035] S3. After confirming the pressure state of the pipeline 1 to be tested, the valve 2 on the pipeline 1 to be tested is driven to perform an opening or closing operation, and the alarm mechanism is simultaneously activated to achieve real-time feedback of the pressure state of the pipeline 1 to be tested.

[0036] In one embodiment, step S2 further includes:

[0037] If the pressure in pipeline 1 is normal, valve 2 of pipeline 1 remains in its current state and the alarm mechanism is not activated. Understandably, when the pressure in pipeline 1 is within the normal range (within the preset threshold), the microswitch of pressure measuring device 4 does not actuate. This means that pressure measuring device 4 has not detected any abnormal pressure in pipeline 1 (neither below the set lower limit nor above the set upper limit). In other words, the microswitch of pressure measuring device 4 remains in the off state.

[0038] In one embodiment, if the pressure of the pipeline 1 to be tested is abnormal, that is, the real-time pressure value of the pipeline 1 to be tested is lower than the lower pressure limit, that is, there is fluid leakage or insufficient fluid pressure in the pipeline 1 to be tested (if there is gas in the pipeline, there is gas leakage or insufficient gas supply); an alarm sound is emitted through the sound and light wireless alarm 5 to activate the alarm mechanism.

[0039] A power-on command is synchronously sent to the solenoid valve 6, which includes an air inlet 63, a first control port 61 and a second control port 62; the left coil of the solenoid valve 6 is energized, and the internal air path of the solenoid valve 6 is switched to connect to the air inlet 63 and the first control port 61.

[0040] At the same time, the pressurized gas in the accumulator 8 flows into the pneumatic actuator 3 from the first control port 61, pushing the pneumatic actuator 3 to generate a rotational torque, thereby driving the valve stem of the valve 2 of the pipeline to be tested 1 to rotate, and the valve 2 performs a closing operation.

[0041] It is understandable that the solenoid valve 6 can be a three-position, three-way solenoid valve 6 having two control ports (a first control port 61 and a second control port 62) and an air inlet 63. This design allows the solenoid valve 6 to control the flow direction of pressurized gas through different power-on states. When the left coil of the solenoid valve 6 is energized, the valve core inside the solenoid valve 6 is attracted by the electromagnetic force, causing the air inlet 63 to communicate with the first control port 61. At this time, the pneumatic actuator 3 receives the pressurized gas flowing out of the air inlet 63 of the solenoid valve 6 and passing through the first control port 61. The pressurized gas pushes the internal piston or diaphragm of the pneumatic actuator 3 to move, generating a torque, which in turn drives the valve stem of the valve 2 to rotate, ultimately achieving the closing operation of the valve 2.

[0042] In another embodiment, if the pressure of the pipeline 1 to be tested is normal, but the real-time pressure value of the pipeline 1 to be tested is higher than the upper pressure limit, that is, the fluid pressure in the pipeline 1 to be tested exceeds the limit (if there is gas in the pipeline, it is excessive gas supply); an alarm sound is emitted by the sound and light wireless alarm 5 to activate the alarm mechanism;

[0043] A power-on command is simultaneously issued to the solenoid valve 6, so that the right coil of the solenoid valve 6 is energized, and the internal air path of the solenoid valve 6 is switched to connect the air inlet 63 with the second control port 62;

[0044] At the same time, the pressurized gas in the accumulator 8 flows into the pneumatic actuator 3 from the second control port 62, pushing the pneumatic actuator 3 to generate a rotational torque, thereby driving the valve stem of the valve 2 of the pipeline 1 to be tested to rotate, and the valve 2 performs the opening operation.

[0045] It can be understood that when the right coil of the solenoid valve 6 is energized, the valve core inside the solenoid valve 6 will be attracted by the electromagnetic force, so that the air inlet 63 is connected to the second control port 62; at this time, the pneumatic actuator 3 receives the pressurized gas flowing out from the air inlet 63 of the solenoid valve 6 and passing through the second control port 62. The pressurized gas will push the internal piston or diaphragm of the pneumatic actuator 3 to move, generating a reverse rotational torque, and then drive the valve stem of the valve 2 to rotate in the opposite direction, and finally realize the opening operation of the valve 2.

[0046] In this way, the solenoid valve 6 can precisely control the movement of the pneumatic actuator 3 according to different power-on states, thereby achieving the closing and opening operations of the valve 2. Throughout the entire process, the pneumatic actuator 3 receives the pressurized gas output by the solenoid valve 6, converts the gas pressure energy into mechanical torque, and directly drives the valve stem to complete the opening and closing operation, thereby achieving automated control of the pipeline valve 2.

[0047] Understandably, the sound and light wireless alarm 5 sounds an alarm and displays a red light when the real-time pressure of the pipeline 1 under test falls below a lower limit, alerting the operator that the pipeline pressure is too low and there may be a leak or other abnormality. When the pressure of the pipeline 1 under test returns to normal or exceeds a set upper limit, the sound and light wireless alarm 5 stops sounding the alarm and switches the displayed red light to green, indicating that the pressure of the pipeline 1 under test is within a normal or safe range. The display is not limited to red and green, and the color of the alarm light can be set as needed. The sound and light wireless alarm 5 can provide real-time feedback on the pipeline pressure status, helping operators to promptly detect and address abnormal situations and ensure the safe operation of the system.

[0048] Furthermore, it is understandable that when the pressure of the pipeline 1 to be tested is within the normal range (within the preset threshold range), the microswitch of the pressure measuring device 4 will not operate. Since the contacts of the pressure measuring device 4 are not closed, the left and right coils of the solenoid valve 6 are both in a de-energized state. In other words, the coil of the solenoid valve 6 is not energized, and the solenoid valve 6 will not switch the air path. The valve core of the solenoid valve 6 is in the middle position under the action of the spring force. This is the default position of the solenoid valve 6, at which time the air inlet 63 is not connected to the first control port 61 and the second control port 62.

[0049] Because the air inlet 63 of the solenoid valve 6 is disconnected from the first control port 61 and the second control port 62, the pressurized gas in the accumulator 8 does not enter the pneumatic actuator 3. Therefore, the pneumatic actuator 3 does not generate any torque. The pneumatic actuator 3 does not drive the valve stem to rotate, and the valve 2 remains in its current state (i.e., remains open or closed).

[0050] In one embodiment, when issuing a power-on command to the solenoid valve 6, the power-on duration of the left and right coils of the solenoid valve 6 is also set. It is understood that the power-on duration of the coils of the solenoid valve 6 can be precisely controlled by the program logic built into the main controller 7. The specific process can be as follows:

[0051] When pressure measuring device 4 detects an abnormal pipeline pressure (e.g., the pressure in pipeline 1 under test falls below a lower limit or rises above an upper limit), it sends an electrical signal to main controller 7. Main controller 7 determines the current status (e.g., the need to close valve 2) based on a preset program and issues a power-on command to solenoid valve 6. Main controller 7 uses an internal timing module to set the power-on duration of solenoid valve 6's coil (e.g., 0.5 seconds). When the set time is reached, main controller 7 automatically cuts off power to the coil, preventing continued power flow even if the pressure signal persists.

[0052] The core purpose of controlling the power-on time is to ensure the accuracy and reliability of valve 2's movement. Controlling the power-on time prevents damage from overload. If the power-on time is too long, the coil of solenoid valve 6 may burn out due to continuous heat, shortening its service life. Controlling the power-on time also saves energy and improves efficiency. Power is only applied when necessary, reducing energy consumption and avoiding unnecessary energy consumption caused by prolonged power supply to solenoid valve 6. In addition, by controlling the power-on time, it is possible to indirectly confirm whether valve 2 has reached the target position (for example, it automatically powers off after being fully closed, without the need for additional feedback signals). It also ensures that the valve automatically powers off after being fully opened and closed, saving energy within the accumulator.

[0053] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0054] In one embodiment, if Figure 2 As shown, an automatic control system for pipeline valves based on pressure monitoring is provided, which corresponds one-to-one with the automatic control method for pipeline valves based on pressure monitoring in the above embodiment. Figure 2 As shown, the automatic control system of the pipeline valve based on pressure monitoring includes:

[0055] The threshold setting and pressure acquisition module 100 is used to set a preset threshold value of the pressure of the pipeline 1 to be tested, which includes an upper pressure limit and a lower pressure limit, and monitor the pressure of the pipeline 1 to be tested in real time to obtain the real-time pressure value of the pipeline 1 to be tested.

[0056] The pipeline pressure state judgment module 200 is used to compare the real-time pressure value of the pipeline 1 to be tested with a preset threshold value to determine whether the real-time pressure of the pipeline 1 to be tested is within the preset threshold range, so as to confirm whether the pressure state of the pipeline 1 to be tested is normal.

[0057] The valve control and alarm module 300 is used to drive the valve 2 on the pipeline 1 to be tested to open or close the valve 2 after confirming the pressure state of the pipeline 1 to be tested, and simultaneously start the alarm mechanism to achieve real-time feedback of the pressure state of the pipeline 1 to be tested.

[0058] In one embodiment, if Figure 3As shown, the threshold setting and pressure acquisition module 100 includes a main controller 7 and a pressure measuring device 4 connected to the input end of the main controller 7; the main controller 7 is used to set a preset threshold value of the pressure of the pipeline 1 to be tested, store the real-time pressure value of the pipeline 1 to be tested obtained by the pressure measuring device 4 in real time, and compare the real-time pressure value of the pipeline 1 to be tested with the preset threshold value to confirm whether the pressure state of the pipeline 1 to be tested is normal; the valve control and alarm module 300 includes a solenoid valve 6, a pneumatic actuator 3, a valve 2, an accumulator 8 and an acousto-optic wireless alarm 5 connected to the main controller 7; the solenoid valve 6 is connected to the output end of the main controller 7, the accumulator 8 is connected to the air inlet 63 of the solenoid valve 6, the pneumatic actuator 3 is connected to the first control port 61 or the second control port 62 of the solenoid valve 6, and the valve 2 is connected to the pneumatic actuator 3.

[0059] In one embodiment, the pressure-monitoring-based automatic control system for pipeline valves further includes a text message alarm connected to the main controller 7 via an RS-485 interface. It is understood that the main controller 7 can be a PLC controller connected to the text message alarm via the RS-485 interface to implement remote monitoring and alarm functions. Specifically, the text message alarm is used to promptly notify remote personnel in the event of a pipeline leak. This means that when a pipeline leak or other abnormality occurs, the PLC controller can trigger the text message alarm, sending an alarm message to personnel who are not on site, allowing them to be informed of the situation and take appropriate measures even if they are not on site. In this way, the PLC controller not only accurately controls the operation of the valve 2 but also improves the safety and reliability of the system, ensuring the normal operation of the pipeline system.

[0060] In another embodiment, an emergency stop button can be provided. In an emergency, the operator can press the emergency stop button to de-energize the entire circuit, stopping all actuators and ensuring system safety. Compared with the prior art, the present invention uses an emergency stop function to quickly cut off system power in an emergency, ensuring system safety and reliability.

[0061] In the present invention, the main controller 7 of the automatic control system for pipeline valves based on pressure monitoring sets preset thresholds for the pressure of the pipeline 1 to be tested, including an upper pressure limit and a lower pressure limit. The pressure measuring device 4 monitors the pressure of the pipeline 1 to be tested in real time and transmits the obtained real-time pressure value to the main controller 7 for storage. The main controller 7 then compares the real-time pressure value of the pipeline 1 to be tested with the preset thresholds to determine whether the pressure status of the pipeline 1 to be tested is normal.

[0062] If the real-time pressure value of the pipeline 1 under test is lower than the preset lower limit, the main controller 7 sends a signal to the solenoid valve 6, energizing the left coil of the solenoid valve 6. The air inlet 63 connects to the first control port 61, and the pressurized gas in the accumulator 8 enters the pneumatic actuator 3, driving the valve 2 to close. Simultaneously, the sound and light wireless alarm 5 issues an alarm signal. If the real-time pressure value is higher than the preset upper limit, the main controller 7 sends a signal to the solenoid valve 6, energizing the right coil of the solenoid valve 6. The air inlet 63 connects to the second control port 62, and the pressurized gas in the accumulator 8 enters the pneumatic actuator 3, driving the valve 2 to open. The sound and light wireless alarm 5 stops the alarm and displays the normal status. If the real-time pressure value is within the preset threshold range, the left and right coils of the solenoid valve 6 are both de-energized. The valve core is in the neutral position due to the spring force. The air inlet 63 is disconnected from both the first control port 61 and the second control port 62. The valve 2 remains in its current state, and the sound and light wireless alarm 5 does not issue an alarm signal. In this way, the system of the present invention can automatically monitor the pipeline pressure, automatically control the opening and closing of the valve 2 according to the pressure state, and promptly send out an alarm signal under abnormal circumstances, thereby realizing automatic control and safety monitoring of the pipeline pressure.

[0063] In one specific embodiment, if the preset threshold range for the pressure of the pipeline 1 to be tested is set to 0.8 MPa to 1.2 MPa, when the real-time pressure of the pipeline 1 to be tested is within the normal range, the microswitch of the pressure measuring device 4 does not respond. This means that the pressure measuring device 4 has not detected any abnormal pipeline pressure (the real-time pressure of the pipeline to be tested is neither lower than the set lower limit nor higher than the set upper limit). The microswitch of the pressure measuring device 4 remains in the off state, the left and right coils of the solenoid valve 6 are both de-energized, the solenoid valve 6 does not switch the air path, and the valve core of the solenoid valve 6 is in the neutral position under the action of the spring force. The pneumatic actuator 3 is stationary (the default position of the solenoid valve 6). At this time, the air inlet 63 is not connected to the first control port 61 and the second control port 62. Since the air inlet 63 of the solenoid valve 6 is not connected to the first control port 61 and the second control port 62, the pressurized gas in the accumulator 8 does not enter the pneumatic actuator 3. Therefore, the pneumatic actuator 3 does not generate torque. The pneumatic actuator 3 does not drive the valve stem of the valve 2 to rotate, and the valve 2 maintains the current opening (ie, remains open or closed).

[0064] It is understandable that when the real-time pressure of the pipeline 1 to be tested is within the normal range, the pressure measuring device 4 does not operate → the solenoid valve 6 coil loses power → the valve core is in the middle position → the pneumatic actuator 3 stops → the valve 2 maintains the current opening (such as fully open state).

[0065] If the pressure suddenly drops to 0.7 MPa (below the lower limit), the pressure measuring device 4 is triggered → the left coil of the solenoid valve 6 is energized → the valve core switches to the first control port 61 → the pneumatic actuator 3 drives the valve 2 to close.

[0066] If the pressure suddenly rises to 1.3 MPa (higher than the lower limit), the pressure measuring device 4 is triggered → the right coil of the solenoid valve 6 is energized → the valve core switches to the second control port 62 → the pneumatic actuator 3 drives the valve 2 to open.

[0067] The specific definition of the automatic control system for pipeline valves based on pressure monitoring can be found in the definition of the automatic control method for pipeline valves based on pressure monitoring above, and will not be repeated here. The various modules in the above-mentioned automatic control system for pipeline valves based on pressure monitoring can be implemented in whole or in part through software, hardware, or a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above modules.

[0068] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 5 As shown. The computer device includes a processor, memory, network interface, and database connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, it implements a method for automatically controlling a pipeline valve based on pressure monitoring.

[0069] Those skilled in the art will clearly understand that for the sake of convenience and brevity in description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above.

[0070] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A method for automatic control of pipeline valves based on pressure monitoring, characterized in that: include: Setting a preset threshold value for the pressure of the pipeline to be tested, which includes an upper pressure limit and a lower pressure limit, and monitoring the pressure of the pipeline to be tested in real time to obtain a real-time pressure value of the pipeline to be tested; Compare the real-time pressure value of the pipeline to be tested with the preset threshold value to determine whether the real-time pressure of the pipeline to be tested is within the preset threshold range, so as to confirm whether the pressure state of the pipeline to be tested is normal; After confirming the pressure status of the pipeline to be tested, the valve on the pipeline to be tested is driven to perform an opening or closing operation, and the alarm mechanism is activated simultaneously to achieve real-time feedback of the pressure status of the pipeline to be tested.

2. The automatic control method of pipeline valves based on pressure monitoring according to claim 1 is characterized in that: The preset threshold value of the pressure of the pipeline to be measured is set, the preset threshold value includes an upper pressure limit and a lower pressure limit, and the pressure of the pipeline to be measured is monitored in real time to obtain the real-time pressure value of the pipeline to be measured, including: By setting a pressure measuring device on the pipeline to be tested, the real-time pressure of the pipeline to be tested is monitored in real time by the pressure measuring device; Set the preset threshold value according to the actual needs on site, and determine the upper and lower pressure limits of the preset threshold value; Obtain the real-time pressure value of the pipeline to be tested monitored by the pressure measuring device in real time.

3. The automatic control method of pipeline valves based on pressure monitoring according to claim 2 is characterized in that: The step of comparing the real-time pressure value of the pipeline to be tested with a preset threshold value to determine whether the real-time pressure of the pipeline to be tested is within the preset threshold value range, so as to confirm whether the pressure state of the pipeline to be tested is normal, includes: Determine the range of the preset threshold value according to the upper and lower pressure limits, and compare the real-time pressure value of the pipeline to be tested with the upper and lower pressure limits; When it is confirmed that the real-time pressure value of the pipeline to be tested is higher than the lower pressure limit, it is determined that the pressure of the pipeline to be tested is normal; After confirming that the real-time pressure value of the pipeline to be tested is lower than the lower pressure limit, it is determined that the pressure of the pipeline to be tested is abnormal.

4. The automatic control method of pipeline valves based on pressure monitoring according to claim 3 is characterized in that: After confirming the pressure state of the pipeline to be tested, the valve on the pipeline to be tested is driven to open or close, and an alarm mechanism is simultaneously activated to achieve real-time feedback of the pressure state of the pipeline to be tested, including: When it is determined that the pressure of the pipeline to be tested is normal, the valve of the pipeline to be tested maintains the current state and the alarm mechanism is not activated.

5. The automatic control method of pipeline valves based on pressure monitoring according to claim 4 is characterized in that: When the pressure of the pipeline to be tested is confirmed to be abnormal, the valve on the pipeline to be tested is driven to close and the alarm mechanism is simultaneously activated to achieve real-time feedback of the pressure status of the pipeline to be tested, and further includes: When the real-time pressure value of the pipeline to be tested is lower than the lower pressure limit, that is, there is fluid leakage or insufficient fluid pressure in the pipeline to be tested; an alarm sound is emitted through the sound and light wireless alarm to activate the alarm mechanism; Synchronously send a power-on command to the solenoid valve, which includes an air inlet, a first control port, and a second control port; energize the left coil of the solenoid valve, and switch the internal air path of the solenoid valve to connect the air inlet and the first control port; At the same time, the pressurized gas in the accumulator flows into the pneumatic actuator from the first control port, pushing the pneumatic actuator to generate a rotational torque, thereby driving the valve stem of the valve of the pipeline to be tested to rotate, and the valve performs a closing operation.

6. The automatic control method of pipeline valves based on pressure monitoring according to claim 4 is characterized in that: When the real-time pressure value of the pipeline to be tested exceeds the upper pressure limit, the valve on the pipeline to be tested is driven to open and the alarm mechanism is activated simultaneously to achieve real-time feedback of the pressure status of the pipeline to be tested. It also includes: When the real-time pressure value of the pipeline to be tested is higher than the upper pressure limit, that is, the fluid pressure in the pipeline to be tested exceeds the limit, an alarm sound is emitted through the sound and light wireless alarm to activate the alarm mechanism; A power-on command is simultaneously issued to the solenoid valve, so that the right coil of the solenoid valve is energized, and the internal air circuit of the solenoid valve is switched to connect the air inlet and the second control port; At the same time, the pressurized gas in the accumulator flows into the pneumatic actuator from the second control port, pushing the pneumatic actuator to generate a rotational torque, thereby driving the valve stem of the valve of the pipeline to be tested to rotate, and the valve performs the opening operation.

7. The automatic control method of pipeline valve based on pressure monitoring according to claims 5-6 is characterized in that: When issuing a power-on command to the solenoid valve, it also includes setting the power-on time of the left coil and the right coil of the solenoid valve so that the valve is automatically powered off after being fully opened and closed.

8. An automatic control system for pipeline valves based on pressure monitoring, characterized in that: include: The threshold setting and pressure acquisition module is used to set the preset threshold value of the pipeline pressure to be tested, which includes the upper and lower pressure limits, and monitor the pressure of the pipeline to be tested in real time to obtain the real-time pressure value of the pipeline to be tested; The pipeline pressure status judgment module is used to compare the real-time pressure value of the pipeline to be tested with a preset threshold value to determine whether the real-time pressure of the pipeline to be tested is within the preset threshold range, so as to confirm whether the pressure status of the pipeline to be tested is normal; The valve control and alarm module is used to drive the valve on the pipeline to be tested to open or close after confirming the pressure status of the pipeline to be tested, and simultaneously activate the alarm mechanism to achieve real-time feedback of the pressure status of the pipeline to be tested.

9. The automatic control system for pipeline valves based on pressure monitoring according to claim 8, characterized in that: The threshold setting and pressure acquisition module includes a main controller and a pressure relay connected to the input end of the main controller; the main controller is used to set a preset threshold value for the pressure of the pipeline to be tested, store the real-time pressure value of the pipeline to be tested obtained by the pressure relay in real time, and compare the real-time pressure value of the pipeline to be tested with the preset threshold value to confirm whether the pressure state of the pipeline to be tested is normal; The valve control and alarm module includes a solenoid valve, a pneumatic actuator, a valve, an accumulator and an audible and visual wireless alarm connected to the main controller; the solenoid valve is connected to the output end of the main controller, the accumulator is connected to the air inlet of the solenoid valve, the pneumatic actuator is connected to the first control port or the second control port of the solenoid valve, and the valve is connected to the pneumatic actuator.

10. The automatic control system for pipeline valves based on pressure monitoring according to claim 9, characterized in that: It also includes a text message alarm connected to the main controller via an RS-485 interface.

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