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CN-121977172-A - Gas pipeline equipment maintenance system and method based on pressure detection

CN121977172ACN 121977172 ACN121977172 ACN 121977172ACN-121977172-A

Abstract

The application relates to a gas pipeline equipment maintenance system and method based on pressure detection. The gas pipe network comprises pipe sections, valves and gas equipment which are sequentially communicated, a detection device is arranged at the pipe sections, the valves and/or the gas equipment to collect pressure and environmental parameters, a central processing unit establishes a topology model according to a pipe network structure, performs sectional differential pressure calculation on the pressure parameters at two ends of the same pipe section, compares the pressure parameters with a baseline differential pressure to obtain differential pressure deviation and trend information of each gas equipment, generates an operation state and a maintenance strategy by combining the environmental parameters, and a valve executing mechanism realizes valve opening and closing according to control signals. The corresponding method comprises the steps of establishing topology, collecting multipoint pressure and environmental parameters, calculating and comparing sectional differential pressure, and checking and generating maintenance strategy and control signals by combining the environmental parameters when differential pressure deviation is abnormal. The scheme realizes the joint diagnosis of the multipoint pressure and the multiple parameters, and improves the fault positioning precision and the early abnormality recognition capability of the gas equipment.

Inventors

  • PENG JIANHUA
  • LAI JUNWEI

Assignees

  • 深圳市中港建筑工程有限公司

Dates

Publication Date
20260505
Application Date
20260310

Claims (10)

  1. 1. The utility model provides a gas pipeline equipment maintenance system based on pressure detection detects the running state of gas pipe network and maintains the control to the gas equipment in the gas pipe network, the gas pipe network includes a plurality of pipeline sections that communicate in proper order, arranges valve and setting on the pipeline section are in a plurality of gas equipment on the pipeline section, its characterized in that, this system includes: a plurality of detection means arranged at the pipe section, the valve and/or the gas plant; The central processing device is in communication connection with each detection device, receives and analyzes the pressure parameters and the environment parameters acquired by the plurality of detection devices, establishes a pipe network topology model according to the structural information of the gas pipe network, and performs sectional differential pressure analysis on the pressure parameters by combining the pipe network topology model to generate the running state of each gas equipment and corresponding equipment maintenance strategy information; The valve actuating mechanism is electrically connected with the central processing device and is used for executing opening and closing control on corresponding valves in the gas pipe network according to control signals output by the central processing device.
  2. 2. The pressure detection-based gas plumbing fixture maintenance system of claim 1, wherein the detection device includes: the pressure sensor is used for detecting the gas pressure at the position of the detection device and outputting the detection result as the pressure parameter; The environment parameter detection unit is used for detecting environment parameters and comprises a temperature sensor used for detecting the temperature of the fuel gas, a particulate matter sensor used for detecting the concentration of solid particulate matters in the fuel gas, a humidity sensor used for detecting the humidity of the fuel gas and/or a combustible gas concentration sensor used for detecting the concentration of the combustible gas.
  3. 3. The pressure detection-based gas plumbing fixture maintenance system of claim 1, wherein the central processing unit includes: the pipe network management module is used for establishing a pipe network topology model according to the structural information of the gas pipe network and managing the corresponding relation between the detection device and the pipe section and the gas equipment; the reference modeling module is used for calculating and storing a baseline differential pressure of a corresponding pipe section or gas equipment based on pressure parameters of each pressure detection node in a plurality of time periods when the gas pipeline system is in a normal operation state; the pressure analysis module is used for carrying out temperature compensation on the pressure parameters based on the gas temperature parameters in the environment parameters, and carrying out sectional differential pressure calculation on the compensated pressure parameters of the adjacent pressure detection nodes so as to obtain corresponding differential pressure characteristics and differential pressure deviation; The operation evaluation module is used for comparing the differential pressure characteristics and the differential pressure deviation with the baseline differential pressure to obtain the variation trend of the differential pressure deviation of each gas device, carrying out preliminary discrimination on the operation state of each gas device based on the differential pressure deviation and the variation trend thereof, and when the preliminary discrimination result shows that an abnormal trend exists in a certain gas device, carrying out rechecking or thinning on the operation state by combining the environment parameters related to the gas device, and dividing the operation state of each gas device into at least one of a normal state, a blocking trend state, a leakage trend state and a pressure regulating abnormal trend state; and the maintenance decision and control module is used for generating the equipment maintenance strategy information according to the running state and outputting a control signal to the valve executing mechanism when the equipment maintenance strategy information meets the set condition so as to realize alarm and valve linkage control.
  4. 4. A gas pipeline equipment maintenance method based on pressure detection, which is applied to the gas pipeline equipment maintenance system as claimed in any one of claims 1 to 3, and is characterized by comprising the following steps: S10, acquiring structural information of the gas pipe network, establishing a pipe network topology model comprising pipe sections, valves and gas equipment, and arranging a plurality of pressure detection nodes at the front and rear positions of at least part of the pipe sections and at least part of the gas equipment in the pipe network topology model; s20, collecting current pressure parameters and environment parameters of each pressure detection node; s30, based on the pipe network topology model, carrying out sectional differential pressure calculation on pressure parameters at two ends of the same pipe section or at the front and rear positions of the same gas equipment to obtain differential pressure characteristics corresponding to each gas equipment; s40, comparing the differential pressure characteristics with a pre-established baseline differential pressure to obtain differential pressure deviation of each gas device and trend information of the differential pressure deviation along with time change; s50, judging whether each gas device meets preset abnormal judgment conditions according to the pressure difference deviation and the trend information of each gas device, and obtaining an abnormal initial judgment result of each gas device; s60, if yes, rechecking the abnormal initial judgment result by combining the corresponding environmental parameters, and generating equipment maintenance strategy information corresponding to each gas equipment based on the rechecking result; And S70, outputting a control signal for prompting manual maintenance and/or controlling the action of a valve in the gas pipe network according to the equipment maintenance strategy information.
  5. 5. The method for maintaining a gas pipeline apparatus based on pressure detection of claim 4, further comprising: the step S50 of discriminating the operation state of each gas apparatus includes: acquiring a pressure difference deviation sequence corresponding to each gas device in a preset time window; carrying out statistical treatment on the differential pressure deviation sequence to obtain an average value, fluctuation degree and/or monotonic change trend of the differential pressure deviation; Dividing the running state of each gas equipment into a normal state, a blocking trend state, a leakage trend state and a pressure regulating abnormal trend state according to the average value, the fluctuation degree and/or the monotone change trend; Wherein the determination of the clogging tendency state includes: judging whether the pressure difference deviation of certain gas equipment in the preset time window is continuously positive or not, wherein the average value is larger than a first threshold value; if so, acquiring the concentration of solid particles in the fuel gas at the front and rear positions of the fuel gas equipment, calculating a corresponding concentration difference value of the solid particles in the preset time window, and judging whether the concentration difference value of the solid particles increases with time; if yes, judging that the gas equipment is in a blocking trend state.
  6. 6. The method for maintaining a gas pipeline apparatus based on pressure detection according to claim 5, wherein the rechecking the operation state in combination with the corresponding environmental parameter in S60 comprises: S61, acquiring a flammable gas concentration parameter sequence corresponding to the pipe section or the gas equipment in the preset time window; S62, calculating an average value and/or a change trend of the concentration of the combustible gas, and judging whether the average value is larger than a third threshold value and/or whether the change trend meets a preset leakage check condition; and S63, if so, determining the running state of the pipe section or the gas equipment as a leakage trend, and if not, correcting the running state of the pipe section or the gas equipment as a pressure regulating abnormal trend or a normal state.
  7. 7. The method for maintaining a gas pipeline apparatus based on pressure detection according to claim 5, wherein the rechecking the operation state in combination with the corresponding environmental parameter in S60 further comprises: s64, acquiring a gas temperature parameter and/or a gas humidity parameter of a corresponding position in the preset time window; s65, comparing the temperature parameter and/or the humidity parameter with a preset normal range, and judging whether the temperature parameter and/or the humidity parameter is in the preset normal range or not; And S66, if so, keeping the operation state of the gas equipment as a pressure regulating abnormal trend if the pressure difference deviation and the fluctuation thereof meet the pressure regulating abnormal rechecking condition, otherwise, correcting the operation state of the gas equipment as a normal state, and adding an environment working condition abnormal prompt in the equipment maintenance strategy information.
  8. 8. The method for maintaining a gas pipeline apparatus based on pressure detection according to claim 4, wherein the generating equipment maintenance policy information comprises: Establishing a health score model for each gas equipment, and calculating the health score of the gas equipment based on at least the differential pressure deviation, the fluctuation degree of the differential pressure deviation, the change trend of the differential pressure deviation and the environmental parameter; And determining the maintenance grade of the gas equipment according to the scoring interval to which the health score belongs, and adjusting the maintenance period of the gas equipment and/or automatically generating a corresponding maintenance work order according to the maintenance grade.
  9. 9. The method for maintaining a gas pipeline apparatus based on pressure detection according to claim 4, wherein the establishing means of the baseline differential pressure comprises: when the gas pipeline system is in a normal running state, a preset baseline acquisition period is selected, and pressure data of each pressure detection node are acquired in a plurality of time periods in the baseline acquisition period; preprocessing the pressure data acquired by each pressure detection node in the baseline acquisition period, including eliminating the pressure data which are abnormal, missing and/or exceed a preset range, and sorting according to a time sequence; Adjacent pressure detection nodes positioned at two ends of the same pipe section or at the front and rear positions of the same gas equipment calculate corresponding sectional differential pressures in each time period to obtain a group of sectional differential pressure sequences of the pipe section or the gas equipment in the baseline acquisition period; The method comprises the steps of carrying out statistical analysis on the segmented differential pressure sequence, at least calculating an average value and fluctuation degree of the segmented differential pressure in a preset time window, taking the average value as a baseline differential pressure of a corresponding pipe section or gas equipment, and determining an allowable fluctuation range of the baseline differential pressure according to the fluctuation degree; And storing the baseline differential pressure and the allowable fluctuation range thereof in an associated mode according to the corresponding pipe section or the gas equipment, and taking the baseline differential pressure and the allowable fluctuation range as baseline data which are called in the subsequent operation state evaluation.
  10. 10. The method for maintaining a gas pipeline apparatus based on pressure detection according to claim 4, wherein the environmental parameter data includes a gas temperature parameter, and the step of calculating the differential pressure in segments in S30 includes: Presetting corresponding reference temperatures for all pressure detection nodes; Acquiring current gas temperature parameters and corresponding pressure data of each pressure detection node at each sampling moment, and performing temperature compensation on the pressure data through a preset temperature compensation model according to the relation between the gas temperature parameters and the reference temperature to obtain temperature compensation pressure data of each pressure detection node; And respectively selecting temperature compensation pressure data of two pressure detection nodes positioned at two ends of the same pipe section or at the front and rear positions of the same gas equipment at the same sampling moment, and calculating the difference value of the two pressure detection nodes to be used as the sectional pressure difference of the pipe section or the gas equipment.

Description

Gas pipeline equipment maintenance system and method based on pressure detection Technical Field The application relates to the field of gas pipeline engineering, in particular to a gas pipeline equipment maintenance system and method based on pressure detection. Background The gas is used as an important supply form of urban and industrial energy, and the transportation and distribution process is usually realized by depending on a gas pipe network consisting of urban gate stations, pressure regulating stations, main pipes, branch pipes, household pipelines and the like. In the process, the gas equipment such as a pressure reducing valve, a filter, a pressure regulator, a branch valve and the like in a pipe network is in a pressure operation state for a long time, once the equipment is leaked, blocked or abnormal in pressure regulation, the gas supply stability of a downstream user can be affected, and safety accidents such as gas leakage, explosion and the like can be possibly caused in serious cases. Therefore, the on-line monitoring of the running state of the gas pipeline and the equipment thereof and the timely and reasonable maintenance are carried out, and the on-line monitoring is a technical problem of long-term attention of the gas industry. In the prior art, the pressure of the gas pipe network is monitored by arranging a pressure gauge or a pressure transmitter at a pressure regulating station, a tail pipe section or a part of key positions so as to judge whether gas supply is in an allowable range, and meanwhile, a combustible gas detector is arranged at a pipe gallery, an indoor or well room and the like, so that leakage alarm is realized by detecting the concentration of the combustible gas in the environment. In addition, there is also a technical scheme that an integrated monitoring device is arranged on a pipeline to detect parameters such as temperature, smoke dust, combustible gas concentration and the like, so that the safety state of a local area is monitored. However, most of the monitoring means are punctiform monitoring or single parameter monitoring, and on the one hand, the pressure sensor is often only arranged at a pressure regulating station or a few key nodes, and only can reflect the pressure change of a certain point or a few points, so that the pressure sensor lacks multi-point pressure distribution information along a pipe section and before and after equipment, and is difficult to accurately locate the abnormality of a specific equipment through the pressure change, such as gradual blockage of a filter, local failure of a certain pressure regulating valve and the like. On the other hand, environmental parameters such as the concentration of combustible gas, the temperature, the concentration of particulate matter and the like are generally used independently for leakage alarm or environmental abnormality judgment, are not organically combined with pressure change information in a pipeline, and are difficult to analyze abnormality causes from the association relation of multi-source data. In the aspect of equipment maintenance, the existing gas pipe network mostly adopts a regular maintenance or empirical maintenance mode, wherein a unified maintenance period is formulated according to the operation years and experience, and equipment such as a pressure reducing valve, a filter and the like are subjected to centralized maintenance or replacement, or are subjected to investigation when field personnel find that the pressure fluctuation is abnormal and the terminal air supply is insufficient. This approach often has problems with delayed or excessive maintenance, which may miss early stages of slow degradation of the device performance, or may unnecessarily inspect the device still in good condition, increasing maintenance costs. In addition, although some prior art schemes propose to integrate various sensors on the same monitoring node, for example, data such as pressure, temperature, humidity, concentration of combustible gas and the like are collected at the same time, most of the parameters are used in parallel, and are independently alarmed after being compared with a preset threshold value, or are respectively uploaded to an upper computer for simple display, and a logic relationship of 'firstly primarily judging the running state based on the pressure characteristic and then rechecking or refining the judging result by combining other sensing parameters' is not established, so that the relevance between the pressure parameter and the environmental parameter cannot be fully utilized to distinguish different fault types. For example, when a downstream pressure drop is found, existing systems have difficulty in further distinguishing whether it is due to equipment blockage, pipe section leakage, or upstream pressure supply fluctuations. In summary, the prior art lacks a technical scheme that the front-rear sectional differential pressure characteristic of the equipment