Diagnostic system for voltage regulating equipment

Abstract

The invention relates to the technical field of urban pipeline natural gas transmission and distribution, and particularly provides a diagnostic system for pressure regulating equipment, which comprises a flow detection module for monitoring the pipeline outlet flow at the outlet end of a time-sharing pressure regulator in real time; the pressure detection module is used for generating dynamic pressure data of an inlet pressure transmitter and an outlet pressure transmitter of the pressure regulating equipment in real time; and the diagnosis module is electrically connected with the flow detection module and the pressure detection module, and is used for acquiring the flow monitoring data and the dynamic pressure data, and comparing the flow monitoring data and the dynamic pressure data with preset pressure regulation characteristic parameters to generate a diagnosis result. According to the diagnosis system, the flow monitoring data and the dynamic pressure data of the pressure regulating equipment are collected through the flow detection module and the pressure detection module which are arranged at the corresponding positions of the pressure regulating equipment, early warning and diagnosis are carried out on the performance condition of the pressure regulating equipment, additional installation can be carried out based on the condition of the existing pressure regulating equipment, and accurate preventive maintenance is implemented.

Description

Technical Field

[0001] The present application relates to the technical field of urban pipeline natural gas transmission and distribution, and in particular to a diagnostic system for pressure regulating equipment. Background Art

[0002] Domestic urban natural gas transmission systems are undergoing continuous construction and improvement. The operational management of medium and low-pressure regulating equipment, directly connected to users, during gas transmission and distribution directly impacts the safety and reliability of gas supply. Gas pressure fluctuates significantly during different periods of use within domestic urban natural gas transmission systems. The operational performance of medium and low-pressure regulating equipment during gas transmission and distribution is crucial for ensuring gas transportation safety, user safety, and ensuring that gas pressures meet user requirements.

[0003] Existing diagnostic inspections for pressure regulating equipment often rely on regular inspections and spot checks to manually troubleshoot the operating performance and status of pressure regulating equipment at multiple locations across the city. This, firstly, requires significant manpower and material resources, and secondly, manual data collection and judgment methods cannot accurately and comprehensively troubleshoot potential faults. Currently, the most widely used method for troubleshooting pressure regulating equipment is to only receive feedback on gas supply anomalies from users when the user's gas usage is abnormal (insufficient gas supply or unstable gas pressure). This makes it impossible to accurately predict abnormal conditions, making this operation and maintenance model inefficient and difficult to avoid economic losses caused by existing faults. Furthermore, the feedback process from pipelines and gas points has a certain lag, and coupled with the uncontrollable peak and low gas usage periods in the actual gas supply process, it can easily exacerbate potential risks to pressure regulating equipment. Summary of the Invention

[0004] In response to the above problems, the present application provides a diagnostic system for pressure regulating equipment. Through the flow detection module and pressure detection module arranged at the corresponding position of the pressure regulating equipment, the flow monitoring data and dynamic pressure data of the pressure regulating equipment are collected, and its performance status is warned and diagnosed. It can be installed based on the status of the existing pressure regulating equipment and implement precise preventive maintenance, making the maintenance of the pressure regulating equipment more reliable.

[0005] To achieve the purpose of this application, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides a diagnostic system for a pressure regulating device, the pressure regulating device comprising a filter, a shut-off device, and a time-shifted pressure regulator. The time-shifted pressure regulator is configured to adjust the gas output at different pressures at the regulator outlet in response to gas demand during different gas usage periods. The actuator of the shut-off device is equipped with a shut-off valve position remote transmitter for feeding back the operating status of the shut-off valve position to a diagnostic module. The system comprises:

[0007] A flow detection module, configured to monitor the pipeline outlet flow at the outlet end of the time-sharing pressure regulator in real time and output flow monitoring data;

[0008] a pressure detection module, comprising an inlet pressure transmitter and an outlet pressure transmitter respectively provided at the input end and the output end of the pressure regulating device, the inlet pressure transmitter and the outlet pressure transmitter being used to generate dynamic pressure data of the pressure regulating device in real time;

[0009] The diagnostic module is electrically connected to the flow detection module and the pressure detection module respectively, and is used to obtain the flow monitoring data and the dynamic pressure data, and generate a diagnostic result based on the comparison of the flow monitoring data and the dynamic pressure data with the preset pressure regulation characteristic parameters; and issue an early warning when the diagnostic result is abnormal; wherein, the pressure regulation characteristic parameters include the closing pressure value of the pressure regulator, the lower limit value of the pressure regulation accuracy of the pressure regulator, and the rated flow value.

[0010] In one possible implementation, the flow detection module includes an insertable flow velocity sensor and a temperature transmitter. The flow detection module monitors the pipeline outlet flow rate at the outlet end of the time-sharing pressure regulator in real time, including: using the insertable flow velocity sensor to obtain the pipeline flow velocity value at the outlet end of the time-sharing pressure regulator; and calculating the pipeline outlet flow rate based on the pipeline flow velocity and the pipeline outlet pressure corresponding to the outlet pressure transmitter using Formula 1:

[0011] Formula 1

[0012] in, is the pipeline outlet flow rate; is the pipeline outlet pressure value; is the pipeline flow velocity value; is the inner diameter of the pipe.

[0013] In one possible implementation, the inlet pressure transmitter is used to generate the pipeline inlet pressure of the pressure regulating device; the flow monitoring data and the dynamic pressure data are compared with the preset pressure regulating characteristic parameters to generate a diagnosis result; an early warning is issued when the diagnosis result is abnormal, including: when the pipeline inlet pressure and the pipeline outlet flow remain unchanged, and the pipeline outlet pressure exceeds the pressure value of the same period to reach a first preset threshold value, an early warning is issued that the valve port sealing gasket of the time-sharing pressure regulator is faulty; when the pipeline inlet pressure remains unchanged and the pipeline outlet flow is zero, the pipeline outlet pressure rises at a low speed until the cut-off valve position is in a closed state, an early warning is issued that the valve port sealing gasket of the time-sharing pressure regulator is damaged; when the pipeline inlet pressure and the pipeline outlet flow remain unchanged, and the pipeline outlet pressure is lower than the lower limit of the pressure stabilization accuracy, an early warning is issued that the time-sharing pressure regulator is faulty. The internal components of the section pressure regulator are worn; when the pipeline inlet pressure remains unchanged and the pipeline outlet flow is zero, the pipeline outlet pressure rises to within the preset range of the pressure regulator closing pressure value before stopping, an early warning is given for the valve port sealing gasket of the time-sharing pressure regulator; when the pipeline inlet pressure remains unchanged and the pipeline outlet flow is zero, the pipeline outlet pressure rises rapidly to the point where the shut-off valve position is in a closed state, an early warning is given for the diaphragm rupture of the time-sharing pressure regulator; when the pipeline inlet pressure and the pipeline outlet flow remain unchanged, and the pipeline outlet pressure is lower than the lower limit of the pressure stabilization accuracy and reaches a second preset threshold value, the pipeline outlet flow is controlled to be closed; when the pipeline outlet flow is zero, and the pipeline outlet pressure is lower than the pressure regulator closing pressure value and reaches a third preset threshold value and remains unchanged, an early warning is given for insufficient spring force of the time-sharing pressure regulator.

[0014] In one possible implementation, the diagnostic module is also used to: when the pipeline inlet pressure remains unchanged, the pipeline outlet pressure decreases, and the pipeline outlet flow increases and exceeds the rated flow value, provide an early warning that the downstream gas consumption of the pressure regulating device exceeds the gas supply of the pressure regulating device.

[0015] In one possible implementation, the system also includes a differential pressure transmitter, which is installed on the filter and is used to detect the pressure difference between the inlet pressure and the outlet pressure of the filter. The diagnostic module is also used to: when the pressure difference reaches different level thresholds of the total range of the differential pressure transmitter, respectively, to warn that the filter has different degrees of blockage; when the pipeline inlet pressure and the pipeline outlet pressure decrease, the pipeline outlet flow decreases, and the pressure difference is less than the lowest level threshold among the different level thresholds, to warn that the upstream pipeline gas source of the pressure regulating equipment has a fault.

[0016] In a possible implementation, the diagnosis module further includes a display submodule; the display submodule is configured to graphically display the status of the plurality of voltage regulating devices; wherein one voltage regulating station corresponds to one or more voltage regulating devices.

[0017] In one possible implementation, the system further includes a noise monitoring module; the diagnostic module further includes a noise processing submodule; the noise monitoring module is used to monitor the noise value of the pressure regulating equipment in real time and send the noise value to the noise processing submodule; the noise processing submodule is used to judge the fault state of the pressure regulating equipment based on the noise value; wherein: when the noise value is greater than the preset noise value in the same period by 10% and the downstream gas consumption does not change, the pressure difference corresponding to the pipeline inlet pressure and the pressure differential transmitter is judged; when the pipeline inlet pressure and the pressure difference are normal, it is determined that the time-sharing pressure regulator has a fault.

[0018] In a possible implementation, when the noise value fluctuates and occurs frequently, and the downstream gas consumption does not change, an early warning is given that an internal component of the time-sharing voltage regulator is faulty.

[0019] In a possible implementation, the system further includes a solar battery storage module for supplying power to the flow detection module and the pressure detection module.

[0020] In a second aspect, the present application provides a city gas Internet of Things system, including a city gas pipeline network and the above-mentioned diagnostic system for pressure regulating equipment.

[0021] The diagnostic system for pressure-regulating equipment provided by the present application collects flow monitoring data and dynamic pressure data of the pressure-regulating equipment through flow detection modules and pressure detection modules deployed at corresponding positions of the pressure-regulating equipment, and provides early warning and diagnosis of its performance status. It can be directly installed based on the status of existing pressure-regulating equipment and implement precise preventive maintenance, making the maintenance of pressure-regulating equipment more reliable, saving manpower and material resources, reducing maintenance costs, and improving efficiency. Here, the addition of the system of the present application does not require large-scale modification of the original pressure-regulating equipment. It only requires the addition of instrument collection points on the original pressure-regulating equipment, which requires little construction and low modification costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present application and form a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not limit the present application.

[0023] Figure 1 A schematic structural diagram of a diagnostic system for voltage regulating equipment according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated. Thus, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; and in the description of this application, unless otherwise specified, "plurality" means two or more.

[0026] Urban gas transmission and distribution networks play a key role in urban gas distribution. Gas is transported from its source via pipelines to the city's gas gate stations. At the gate stations, the gas undergoes pretreatment, including metering, pressure regulation, and purification, to ensure it meets the network's transmission requirements. The pretreated gas is then transported via the city's high- and medium-pressure gas pipelines to pressure regulating stations in various regions of the city. Within each regional pressure regulating station, the high- and medium-pressure gas is regulated to medium or low pressures suitable for residential and commercial users. The gas is metered and odorized before being delivered to users via medium- and low-pressure pipelines. Gas pressure regulating equipment plays a crucial role in this gas supply system. Leaks can pose a serious safety hazard, potentially causing widespread gas outages or overpressure downstream. The current response involves immediately dispatching personnel to the site upon receiving user feedback. Gas companies have invested heavily in this area, but with the expansion of urban development, this workforce is becoming increasingly scarce, placing significant pressure on the company.

[0027] During uncontrollable peak and low-peak periods of gas consumption during actual gas supply, while maintaining constant pressure and flow, downstream users (downstream gas points) can experience excessive gas consumption during peak periods, leading to a drop in pipeline pressure, impacting downstream users' gas consumption. If pipeline pressure is increased, during low-peak periods, reduced gas consumption will cause pipeline pressure to rise, creating the safety risk of overpressure. Some large urban gas pipelines are over 20 years old, and some cities use existing coal gas pipelines instead of natural gas pipelines. These pipelines are designed to operate at lower pressures, creating safety risks such as bursts and leaks if the network pressure is increased. Furthermore, due to the large number of downstream users, most of the medium- and low-pressure gas pressure regulating equipment (pressure regulating cabinets) currently located in urban areas lack flow meters. The lack of a power port also limits the ability to retrofit intelligent devices, making management difficult. Gas theft is common, leading to discrepancies between gas usage and actual gas delivery, resulting in financial losses for gas companies.

[0028] In order to solve the above technical problems, the present invention proposes the following technical solutions and corresponding embodiments. Figure 1 The embodiment shown describes the technical solution of the present invention:

[0029] Example 1

[0030] Figure 1 A schematic diagram of the structure of a diagnostic system for a voltage regulating device according to an embodiment of the present application is shown. Figure 1 As shown, the system includes: a flow detection module (flow velocity detection device) for monitoring the pipeline outlet flow at the outlet end of the pressure regulator (time-sharing pressure regulator) in real time and outputting flow monitoring data; a pressure detection module, including an inlet pressure transmitter and an outlet pressure transmitter respectively provided at the input and output ends of the pressure regulating device, the inlet pressure transmitter and the outlet pressure transmitter being used to generate dynamic pressure data of the pressure regulating device in real time; a valve position transmitter for feeding back the working status of the valve position of the shut-off valve to the diagnostic module; a differential pressure transmitter attached to the filter for detecting the pressure difference between the inlet pressure and the outlet pressure of the filter; a diagnostic module, electrically connected to the flow detection module and the pressure detection module respectively, for acquiring the flow monitoring data and the dynamic pressure data, and comparing the flow monitoring data and the dynamic pressure data with preset pressure regulation characteristic parameters to generate a diagnostic result; and issuing an early warning when the diagnostic result is abnormal. The pressure regulation characteristic parameters include the closing pressure value of the pressure regulator, the lower limit value of the pressure regulation accuracy of the pressure regulator, and the rated flow value.

[0031] The pressure regulator in this embodiment is connected to a time-based pressure-regulating device, which works together with the indirect-acting pressure regulator to regulate city gas pressure. The time-based pressure-regulating device is a pressure-regulating device with preset pressure settings for different time periods via a control unit. The operator inputs these pressure settings through the control unit's (system's) human-machine interface (e.g., higher pressure for peak gas usage periods and lower pressure for off-peak gas usage periods). During operation, the pressure detection module monitors the regulator's outlet pressure in real time and transmits the outlet pressure signal to the time-based pressure-regulating device, which monitors and compares dynamic pressure data and adjusts the regulator's valve opening based on the pressure settings for different time periods, aligning the outlet pressure with the set pressure value. This ensures flexible pressure regulation for different gas usage periods.

[0032] In an embodiment of the present application, a flow detection module includes an insertable flow velocity sensor and a temperature transmitter; the flow detection module monitors the pipeline outlet flow rate at the outlet end of the time-sharing pressure regulator in real time, including: using the insertable flow velocity sensor to obtain the pipeline flow velocity value at the outlet end of the time-sharing pressure regulator; and calculating the pipeline outlet flow rate based on the pipeline flow velocity and the pipeline outlet pressure corresponding to the outlet pressure transmitter using Formula 1:

[0033] Formula 1

[0034] in, is the pipeline outlet flow rate; is the pipeline outlet pressure value; is the pipeline flow velocity value; is the inner diameter of the pipe.

[0035] In this embodiment, a diagnostic system for each pressure-regulating device in the entire city gas pipeline network includes the following data collection points: 1) Inlet pressure transmitter P1, located on the inlet side of the pressure regulator, monitors the inlet pressure; 2) Inlet pressure transmitter P2, located on the outlet side of the pressure regulator, monitors the outlet pressure; 3) Differential pressure transmitter P3, located on the pipeline filter, detects the pressure difference between the filter inlet and outlet pressures; 4) Shut-off valve position transmitter, located on the shut-off valve actuator, provides feedback on the open / closed status of the shut-off valve; 5) Flow rate detector, located on the outlet pipeline of the pressure regulator, detects the natural gas flow rate within the pipeline. The flow rate under standard conditions can be calculated using the flow calculation formula: Q = D2(P+1) v / 353.68; 6) Time-of-day pressure regulator, installed near the pressure regulator. The starting gas source for the time-of-day pressure regulator is derived from the inlet pressure, which is threaded into the inlet pressure sampling valve. The output pressure of the time-of-day pressure regulator is connected to the pressure regulator's regulating spring chamber. Working method: Output pressure = set pressure - spring base pressure. Set pressure comes from the user-specified pressure.

[0036] During the pressure regulation control process, the performance parameters of the pressure regulating device are first input into the system: cut-off pressure value, pressure regulator closing pressure value, pressure regulator voltage stabilization accuracy lower limit value, and rated flow value. The control unit can compare the data collected at each collection point with the pressure regulator performance parameters and provide early warning if any abnormality is found:

[0037] 1. When the data collected by the differential pressure transmitter reaches 30% of the instrument's total range, a general warning is issued, indicating that the filter is slightly clogged. When it reaches 50%, a yellow warning is issued, indicating that the filter is clogged and needs to be cleaned as soon as possible. When it reaches 80%, a red warning is issued, indicating that the filter is severely clogged and must be cleaned immediately.

[0038] 2. When the flow rate calculated by the system exceeds 5% of the total gas consumption of downstream users, an early warning signal will be issued, indicating that there is gas leakage or gas theft downstream.

[0039] 3. If the inlet pressure P1 and outlet flow Q do not change, but the outlet pressure exceeds the daily value by more than 5% compared with the same period recently, the valve port seal of the warning pressure regulator may be faulty;

[0040] 4. The inlet pressure P1 and outlet flow Q do not change, but the outlet pressure is lower than the lower limit of the voltage regulator's pressure regulation accuracy. It can be judged that the internal parts of the voltage regulator are worn or lack of lubricating oil;

[0041] 5. If the inlet pressure P1 does not change and the outlet flow Q is zero, and the outlet pressure P2 slowly rises until the shut-off valve position indicates closed, it can be determined that the valve port seal of the pressure regulator is damaged. A warning signal is issued.

[0042] 6. If the inlet pressure P1 remains unchanged and the outlet flow rate Q is zero, but the outlet pressure P2 slowly rises to 5% to 15% of the regulator's closing pressure before stopping, it can be determined that the regulator valve port seal is slightly worn. This will issue a warning signal and prompt timely repairs.

[0043] 7. When the inlet pressure P1 does not change and the outlet flow Q is zero, the outlet pressure P2 rises rapidly until the shut-off valve position indicates closed. This indicates that the regulator diaphragm is ruptured and a warning signal is issued.

[0044] 8. If the inlet pressure P1 decreases, the outlet pressure P2 decreases, the flow rate decreases, and the filter pressure difference is less than 30%, it can be judged that the upstream pipeline gas source is faulty and an early warning is issued. Check the upstream pipeline.

[0045] 9. If the inlet pressure P1 remains unchanged, the outlet pressure P2 decreases, and the flow rate Q increases and exceeds the rated flow rate, it can be determined that the downstream gas consumption exceeds the equipment's gas supply. An early warning message will be issued: Check the downstream pipeline for leaks.

[0046] 10. The inlet pressure P1 does not change, the outlet flow Q does not change, but the outlet pressure is lower than 5% of the lower limit of the pressure regulator's pressure stabilization accuracy. When the outlet flow Q is zero, the outlet pressure is lower than 5% of the closing pressure value of the pressure regulator and remains lower than 5%. It can be judged that the pressure regulator spring is fatigued and the spring force is insufficient, and it is warned to replace the pressure regulator spring.

[0047] The city gas pressure regulating and control system of this embodiment can be directly installed on the existing pressure equipment pipeline. After being fixed on site, it can be used directly after being threadedly connected through the pipeline sampling valve without dismantling the existing pipeline.

[0048] The constant pipeline inlet pressure and the constant pipeline outlet flow rate refer to that the monitored pipeline outlet pressure and the calculated pipeline outlet flow rate do not change within a time preset by the system.

[0049] When the difference between the pipeline outlet flow rate and the total gas consumption of users downstream of the pressure regulating device is greater than a preset threshold, an early warning is given that there is a gas leakage or gas theft downstream of the pressure regulating device.

[0050] In an embodiment of the present application, the diagnostic system further includes a solar battery storage module for supplying power to the flow detection module and the pressure detection module.

[0051] In the embodiment of the present application, the noise monitoring module is used to monitor the noise value of the pressure regulating device in real time and send the noise value to the noise processing submodule for fault diagnosis. Specifically: 1. During the operation of the pressure regulating box, the pipeline is affected by the airflow and vibrates, thereby generating noise. The noise of a normal pressure regulating device is smooth and low. When a system failure occurs, the airflow will be unstable and the noise detection value will also change. We can judge whether the pressure regulating system has a fault by comparing the change in noise value with the size of the gas consumption during high and low peak periods; 2. The noise detection device is installed within 1 meter of the pressure regulator, and the detection data is uploaded to the intelligent diagnosis system. After data comparison and comprehensive analysis, it is determined whether the pressure regulating device is in normal state; 3. The installation of a noise detection system can intuitively determine whether the pressure regulating device is normal by the size of the noise value: Among them: A. When the detected noise value is more than 10% higher than the noise value in the normal working state and the downstream gas consumption does not change, an inlet pressure fault warning is issued. Analyze whether the inlet pressure is normal (inlet pressure transmitter); analyze whether the inlet filter is blocked (differential pressure transmitter); if everything is normal, finally determine that the pressure regulator is faulty; B. When the noise value is detected to be high and low at a high frequency, and the downstream gas consumption does not change, it is warned that the internal parts of the pressure regulator are faulty.

[0052] Therefore, by deploying the flow detection module and pressure detection module at the corresponding position of the pressure regulating equipment, the flow monitoring data and dynamic pressure data of the pressure regulating equipment are collected accordingly, and its performance status is warned and diagnosed. It can be directly installed based on the status of the existing pressure regulating equipment, and accurate preventive maintenance can be implemented, making the maintenance of the pressure regulating equipment more reliable, saving manpower and material resources, reducing maintenance costs, and improving efficiency.

[0053] In the embodiment of the present application, the diagnostic module adopts a visual, human-machine interface, integrates artificial intelligence algorithms, has fast speed and high accuracy, and leaves sufficient redundancy, making it convenient to intuitively understand the implementation dynamics of the gas pipeline network.

[0054] Based on the foregoing embodiments, an embodiment of the present application further provides a power system, including the above-mentioned diagnostic system for voltage regulating equipment.

[0055] In the several embodiments provided in this application, it should be understood that the disclosed systems, modules and methods can be implemented in other ways. For example, the module embodiments described above are only schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of modules or units, which can be electrical, mechanical or other forms.

[0056] The above embodiments are intended only to illustrate the technical solutions of the present application and are not intended to limit them. The present application is not limited to the precise structures described above and illustrated in the accompanying drawings, and it cannot be assumed that the specific implementation of the present application is limited to these descriptions. For those skilled in the art of the present application, any changes and modifications made without departing from the concept of the present application should be deemed to fall within the scope of protection of the present application.

Claims

1. A diagnostic system for a pressure regulating device, comprising a filter, a shut-off valve, and a time-shifted pressure regulator. The time-shifted pressure regulator is configured to adjust the gas output at different pressures at the regulator outlet in response to gas demand during different gas usage periods. The actuator of the shut-off valve is equipped with a valve position transmitter for feeding back the working status of the shut-off valve position to a diagnostic module. The system is characterized in that: The system includes: A flow detection module, configured to monitor the pipeline outlet flow at the outlet end of the time-sharing pressure regulator in real time and output flow monitoring data; a pressure detection module, comprising an inlet pressure transmitter and an outlet pressure transmitter respectively provided at the input end and the output end of the pressure regulating device, the inlet pressure transmitter and the outlet pressure transmitter being used to generate dynamic pressure data of the pressure regulating device in real time; The diagnostic module is electrically connected to the flow detection module and the pressure detection module respectively, and is used to obtain the flow monitoring data and the dynamic pressure data, and generate a diagnostic result based on the comparison of the flow monitoring data and the dynamic pressure data with the preset pressure regulation characteristic parameters; and issue an early warning when the diagnostic result is abnormal; wherein, the pressure regulation characteristic parameters include the closing pressure value of the pressure regulator, the lower limit value of the pressure regulation accuracy of the pressure regulator, and the rated flow value.

2. The diagnostic system for voltage regulating equipment according to claim 1, characterized in that: The flow detection module includes an inserted flow rate sensor; the flow detection module monitors the pipeline outlet flow at the outlet end of the time-sharing voltage regulator in real time, including: Using the plug-in flow rate sensor to obtain the pipeline flow rate value at the outlet end of the pressure regulator; The pipeline outlet flow rate is calculated based on the pipeline flow velocity and the pipeline outlet pressure corresponding to the outlet pressure transmitter using Formula 1: Q=D 2 ×(P+1)×V / 353.68Formula 1 Among them, Q is the pipeline outlet flow rate; P is the pipeline outlet pressure value; V is the pipeline flow velocity value; D is the pipeline inner diameter.

3. The diagnostic system for voltage regulating equipment according to claim 2, characterized in that: The inlet pressure transmitter is used to generate the pipeline inlet pressure of the pressure regulating device; the flow monitoring data and the dynamic pressure data are compared with the preset pressure regulating characteristic parameters to generate a diagnosis result; Prompt an early warning when the diagnostic result is abnormal, including: When the pipeline inlet pressure and the pipeline outlet flow rate remain unchanged, and the pipeline outlet pressure exceeds the pressure value of the same period and reaches a first preset threshold, an early warning is given that the valve port sealing gasket of the time-sharing pressure regulator is faulty; When the pipeline inlet pressure remains unchanged and the pipeline outlet flow rate is zero, the pipeline outlet pressure Low speed When the cut-off valve position rises to a closed state, an early warning is given that the valve port sealing gasket of the time-sharing pressure regulator is damaged; When the pipeline inlet pressure and the pipeline outlet flow rate remain unchanged and the pipeline outlet pressure is lower than the lower limit of the pressure stabilization accuracy, an early warning is issued that the internal components of the time-sharing voltage regulator are worn; When the pipeline inlet pressure remains unchanged and the pipeline outlet flow is zero, the pipeline outlet pressure rises to within the preset range of the pressure regulator closing pressure value before stopping, and an early warning is given that the valve port sealing gasket of the time-sharing pressure regulator is slightly worn; When the pipeline inlet pressure remains unchanged and the pipeline outlet flow rate is zero, the pipeline outlet pressure fast When the pressure rises to the point where the cut-off valve is in a closed state, an early warning is given of a rupture of the membrane of the time-sharing pressure regulator; When the pipeline inlet pressure and the pipeline outlet flow remain unchanged, and the pipeline outlet pressure is lower than the lower limit of the pressure stabilization accuracy and reaches a second preset threshold value, the pipeline outlet flow is controlled to be closed; when the pipeline outlet flow is zero, and the pipeline outlet pressure is lower than the pressure regulator closing pressure value and reaches a third preset threshold value and remains unchanged, an early warning is given that the spring force of the time-sharing pressure regulator is insufficient.

4. The diagnostic system for voltage regulating equipment according to claim 3, characterized in that: The diagnostic module is further configured to: When the pipeline inlet pressure remains unchanged, the pipeline outlet pressure decreases, and the pipeline outlet flow increases and exceeds the rated flow value, an early warning is issued that the downstream gas consumption of the pressure regulating device exceeds the gas supply of the pressure regulating device.

5. The diagnostic system for voltage regulating equipment according to claim 4, characterized in that: The system further includes a differential pressure transmitter, which is mounted on the filter and is used to detect the pressure difference between the inlet pressure and the outlet pressure of the filter. The diagnostic module is further used to: When the pressure difference reaches different level thresholds of the total range of the differential pressure transmitter, an early warning is given that the filter is clogged to varying degrees; When the pipeline inlet pressure and the pipeline outlet pressure decrease, the pipeline outlet flow rate decreases, and the pressure difference is less than the lowest level threshold among the different level thresholds, an early warning is given that the upstream pipeline gas source of the pressure regulating device has a fault.

6. The diagnostic system for voltage regulating equipment according to claim 5, characterized in that: The diagnostic module also includes a display submodule; The display submodule is used to display the status of multiple voltage regulating devices; wherein, one voltage regulating station corresponds to one or more voltage regulating devices.

7. The diagnostic system for voltage regulating equipment according to claim 6, characterized in that: The system further includes a noise monitoring module; the diagnosis module further includes a noise processing submodule; The noise monitoring module is used to monitor the noise value of the voltage regulating equipment in real time and send the noise value to the noise processing submodule; The noise processing submodule is used to determine the fault status of the voltage regulating device based on the noise value; wherein: When the noise value is greater than the preset noise value in the same period by 10% and the downstream gas consumption does not change, the pipeline inlet pressure and the pressure difference corresponding to the differential pressure transmitter are judged; when the pipeline inlet pressure and the pressure difference are normal, it is determined that the time-sharing pressure regulator has a fault.

8. The diagnostic system for voltage regulating equipment according to claim 7, characterized in that: When the noise value fluctuates and occurs frequently, and the downstream gas consumption does not change, an early warning is given that an internal component of the time-sharing voltage regulator is faulty.

9. The diagnostic system for voltage regulating equipment according to any one of claims 1 to 8, characterized in that: The system further comprises a solar battery storage module for supplying power to the flow detection module and the pressure detection module.

10. A city gas Internet of Things system, characterized in that: The invention comprises a city gas pipeline network and a diagnostic system for pressure regulating equipment as described in claims 1-9.

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