CN116739352A - Gas pipeline safety evaluation early warning system, method and storage medium - Google Patents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
The invention discloses a gas pipeline safety evaluation early warning system, a gas pipeline safety evaluation early warning method and a storage medium, and relates to the technical field of data analysis, wherein the gas pipeline safety evaluation early warning system comprises a device layer, a data storage layer and a control layer; the equipment layer comprises a pressure gauge, a pressure transmitter, a flowmeter, a CPU and an alarm; the data storage layer is used for storing data generated by the system; the control layer comprises a region division module, a gas flow monitoring module, a pipeline pressure measuring module, a safety evaluation module and an early warning module, wherein the region division module is used for dividing a gas pipeline, the gas flow monitoring module is used for monitoring gas flow of a gas inlet and a gas outlet of the gas pipeline, the pipeline pressure measuring module is used for measuring internal and external pressure values of the gas pipeline, the safety evaluation module is used for evaluating safety of the gas pipeline, and the early warning module is used for early warning. The invention improves the practicability of the safety evaluation of the gas pipeline and avoids the influence of artificial evaluation on evaluation early warning.
Description
Technical Field
The invention relates to the technical field of data analysis, in particular to a gas pipeline safety evaluation and early warning system, a gas pipeline safety evaluation and early warning method and a storage medium.
Background
With the continuous development of cities, the construction layout of urban gas pipelines is increasingly complex, and the requirement of carrying out normalized safety evaluation on complex gas pipe networks is also increasingly emphasized, but more in the prior art, the gas tightness optimization providing method during the gas pipeline manufacture is concentrated, or the safety evaluation is carried out on the running gas pipelines in a grading mode, so that the evaluation accuracy is lower, and the accurate safety evaluation cannot be carried out on the running gas pipelines.
The chinese patent with publication number CN116336398A discloses a method, system and medium for intelligent gas leakage safety monitoring based on internet of things, the method is executed by a processor in an intelligent gas safety management platform of the intelligent gas leakage safety monitoring system based on internet of things, the method comprises: acquiring regional data and industrial gas data of a workshop to be monitored; determining key subregions based on the regional data and the industrial gas data; at least one recommended monitoring point is determined based on the environmental data of the key sub-region. Based on the data acquired by the Internet of things, recommended monitoring points are reasonably and reliably determined according to different complex environments, and the sensitivity and accuracy of gas leakage safety monitoring are improved.
The method for evaluating the safety of the polyethylene gas pipeline under the ground contact impact of the demolition collapse body by blasting is disclosed in Chinese patent with the application publication number of CN113504024A, and the load of the ground contact impact on the buried polyethylene pipeline is calculated; carrying out a tensile test to obtain real stress and real strain; substituting the real stress and the real strain into a hyperbolic constitutive model of the buried polyethylene pipeline to obtain the elastic modulus of the buried polyethylene pipeline; building a riser soil finite element model, substituting the elastic modulus into the riser soil finite element model, and performing dynamic response simulation to obtain stress distribution; and finally, evaluating the safety of the buried polyethylene pipeline under the ground contact impact of the demolition and collapse body. The method can be used for providing effective reference for blasting engineering construction and scientific and reasonable judgment basis for protecting the buried polyethylene gas pipeline during blasting construction.
The Chinese patent with the application publication number of CN113449955A discloses a comprehensive pipe rack danger-sensitive pipeline safety assessment method based on a fault tree analysis method, which comprises the following steps: 1. drawing a comprehensive pipe gallery danger sensitive pipeline fault tree model; 2. the method comprises the steps of solving a minimum cut set, drawing a fault tree and a structural function formula of the fault tree, and comprises the following steps: a. the utility tunnel gas pipeline burns the explosion accident; b. a utility tunnel thermal pipeline leakage accident; 3. analyzing the structural severity; 4. quantitative analysis; 5. safety evaluation, namely classifying risk grades of the utility tunnel dangerous sensitive pipelines into the following steps: class I is low risk level; class II is of lower risk level; class III is medium risk level; grade IV is a higher risk level; the V level is high in risk level; 6. and early warning in real time and transmitting pipeline information to a maintenance station in time. The comprehensive pipe rack danger-sensitive pipeline safety assessment method can effectively monitor the safety degree of the danger-sensitive pipeline in the comprehensive pipe rack, and can provide early warning information for a pipe rack monitoring center in real time, so that the operation safety of the whole underground comprehensive pipe rack system is guaranteed.
The problems presented in the background art exist in the above patents: the safety evaluation of the running gas pipeline cannot be accurately performed in real time. In order to solve the problems, the invention provides a gas pipeline safety evaluation and early warning system, a gas pipeline safety evaluation and early warning method and a storage medium.
Disclosure of Invention
Aiming at the defects of the prior art, the invention mainly aims to provide a gas pipeline safety evaluation and early warning system, a gas pipeline safety evaluation and early warning method and a storage medium, which can effectively solve the problems in the background art. The specific technical scheme of the invention is as follows:
the system comprises an equipment layer, a data storage layer and a control layer;
the equipment layer comprises a pressure gauge, a pressure transmitter, a flowmeter, a CPU and an alarm, wherein the pressure gauge is used for measuring the pressure value in the gas pipeline, the pressure transmitter is used for transmitting the pressure value in the gas pipeline in different areas to the control layer, the flowmeter is used for measuring the change of the instantaneous flow and the total flow in the gas pipeline, the CPU is used for processing the data generated in the system, and the alarm is used for giving an alarm when the safety problem occurs in the gas pipeline;
the data storage layer is used for storing data generated when the system operates;
the control layer comprises an area dividing module, a gas flow monitoring module, a pipeline pressure measuring module, a safety evaluation module and an early warning module, wherein the area dividing module is used for dividing areas of a gas pipeline according to population density, the gas flow monitoring module is used for monitoring gas flow of a gas inlet and a gas outlet of the gas pipeline respectively, the pipeline pressure measuring module is used for measuring pressure values inside and outside the gas pipeline, the safety evaluation module is used for evaluating safety of the gas pipeline according to data provided by the gas flow monitoring module and the pipeline pressure measuring module, and the early warning module is used for judging and early warning safety of the gas pipeline according to results output by the safety evaluation module.
The invention is further improved in that the regional division module comprises a population density calculation strategy, and the population density calculation strategy comprises the following specific steps:
s101, laying gas pipelineIndividual areas are measured separately->The population density of the sub-region is set at +.>The area->Is +.>First->The area->Interior (I)>The population of the secondary measurement is +.>Wherein->，；
S102, then the firstGas pipeline laying area->Is +.>。
The invention further improves that the regional division module also comprises a regional division strategy, and the regional division strategy comprises the following specific contents:
s201, whenWhen it is, then->Gas pipeline laying area->Add to collection->In the collection->Is about population densityA collection of collection areas;
s202, whenWhen it is, then->Gas pipeline laying area->Add to collection->In the collection->Is a collection of medium-sized regions of the population;
s203, whenWhen it is, then->Gas pipeline laying area->Add to collection->In the collection->Is a collection of sparsely populated areas.
A further improvement of the invention is that the gas flow monitoring module includes a monitoring circuit for monitoring the first flow rateGas flow at gas pipe inlets of individual gas pipe laying areas +.>And gas flow rate at the gas outlet->。
A further development of the invention is that the line pressure measuring module comprises a measuring fourthAbsolute pressure of gas line in the individual gas line laying areas +.>。
The invention further improves that the safety evaluation module judges whether the gas pipeline has leakage holes according to the gas leakage quantity of the gas pipeline, and comprises the following concrete contents:
s301, set upThe gas pipeline inner diameter of each gas pipeline laying area is +.>；
S302, whenWhen in use, then->The gas pipelines of the gas pipeline laying areas normally run, and no leakage holes exist in the gas pipelines;
s303, whenWhen in use, then->Abnormal operation of the gas pipelines in the gas pipeline laying areas, and leakage holes exist in the gas pipelines;
s304 is set as the firstWhen the gas pipeline of the gas pipeline laying area has leakage holes, the leakage hole diameter is +.>。
The invention further improves that the safety evaluation module also comprises a gas pipeline gas leakage speed calculation strategy, wherein the gas pipeline gas leakage speed depends on the size of a gas pipeline leakage aperture, and the gas pipeline gas leakage speed calculation strategy comprises the following specific steps:
s401, whenWhen the gas flow equation set of the gas pipeline is built +.>Wherein->For the absolute pressure of the gas line, +.>Is the density of the gas in the gas pipeline, +.>Is the gas constant of the gas pipeline>Is the temperature of the gas in the gas pipeline, +.>For the gas leakage rate of the gas pipeline, < >>Is a gas insulation index>Is a constant;
s402, solving the equation set in the step S401 in a combined way to obtain the gas flow velocity at the gas pipeline leakage hole, and obtaining the current value by differentiating the gas flow velocity at the gas pipeline leakage hole and the gas flow velocity in the gas pipelineAt the time of gas leakage rate of gas pipeline>Wherein->The gas density at the gas pipe leakage orifice is the pressure at the gas pipe leakage orifice>Wherein->Is at standard atmospheric pressure;
s403, whenWhen the gas flow equation set of the gas pipeline is built +.>When->At this time, the pressure at the leakage orifice of the gas line is +.>Equal to standard atmospheric pressure->Temperature at the leak hole of the gas pipelineGas Density at gas pipe leakage hole>；
S404, calculating the formula in the step S403 to obtain: when (when)When in use, the gas pipelineGas leakage rate->。
The invention further improves that the safety evaluation module also comprises a gas leakage amount calculation strategy of the gas pipeline, and the gas leakage amount calculation strategy of the gas pipeline comprises the following specific steps:
s501, whenDuring the process, the gas leakage amount of the gas pipeline is->Wherein->，/>Is the gas flow coefficient at the leakage hole of the gas pipeline, +.>；
S502, whenDuring the process, the gas leakage amount of the gas pipeline is->。
The invention further improves that the safety evaluation module also comprises a calculation strategy of the gas leakage critical value of the gas pipeline, and the calculation strategy of the gas leakage critical value of the gas pipeline comprises the following specific steps:
s601, whenWhen in use, let->，/>Critical value of gas leakage quantity of gas pipeline；
S602, whenWhen in use, let->Critical value of gas leakage quantity of gas pipeline。
A further improvement of the invention is that the security assessment module further comprises calculating a thirdGas pipeline gas actual leakage amount of each gas pipeline laying area +.>。
The invention is further improved in that the early warning module comprises a gas pipeline safety early warning strategy, and the early warning strategy comprises the following specific contents:
s701, setting early warning grades to comprise primary early warning, secondary early warning and tertiary early warning;
s702, judging formula of primary early warning of gas pipeline safetyIf the judgment formula->If true, outputting true, and sending out a primary early warning alarm by the early warning module;
s703, judging formula of gas pipeline safety secondary early warningIf the judgment formula->If true, outputting true, and sending out a secondary early warning alarm by the early warning module;
s704, judging formula of three-level early warning of gas pipeline safetyIf the judgment formula->If true, the true is output, and the early warning module sends out three-level early warning alarms.
The gas pipeline safety assessment and early warning method is realized based on a gas pipeline safety assessment and early warning system, and comprises the following specific steps:
s1, dividing areas of a gas pipeline according to population density;
s2, monitoring gas flow of a gas inlet and a gas outlet of a gas pipeline;
s3, measuring pressure values inside and outside the gas pipeline;
s4, evaluating the safety of the gas pipeline according to the data provided in the steps S2 and S3;
s5, judging and early warning the safety of the gas pipeline according to the output results of the steps S1 and S4.
A computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a gas pipeline safety assessment and early warning method.
An apparatus, comprising:
a memory for storing instructions;
and the processor is used for executing the instructions, so that the equipment executes the operation of realizing a gas pipeline safety evaluation early warning method.
Compared with the prior art, the invention has the following beneficial effects:
the method and the system can accurately evaluate the safety of the running gas pipeline in real time, evaluate the safety of the urban gas pipeline through computer software calculation, further improve the accuracy of evaluating the safety of the gas pipeline, monitor the safety of the gas pipeline in different areas in real time and save a large amount of cost;
and c2, the invention can consider the influence of population density on the safety evaluation of the gas pipeline, combines the population density and the gas leakage of the gas pipeline to evaluate the safety of the gas pipeline, further improves the practical value of the safety evaluation of the gas pipeline, and the obtained evaluation early warning result is calculated on the basis of the actual conditions of the gas pipeline in different areas by adopting a scientific mathematical method, so that the early warning result is strict and objective, and the influence of subjective factors such as human evaluation and the like on the evaluation early warning is avoided.
Drawings
FIG. 1 is a schematic diagram of a gas pipeline safety evaluation and early warning system according to the present invention;
FIG. 2 is a workflow diagram of a gas pipeline safety assessment and early warning method of the invention;
fig. 3 is a schematic structural diagram of a gas pipeline safety evaluation and early warning system, a gas pipeline safety evaluation and early warning method and a storage medium in the storage medium.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
The embodiment of the invention uses a gas pipeline safety assessment and early warning system, a method and a storage medium to divide a gas pipeline in a certain gas pipeline laying area, and the specific scheme is that, as shown in fig. 1 and fig. 2, the gas pipeline safety assessment and early warning system, the method and the storage medium comprise an equipment layer, a data storage layer and a control layer;
the equipment layer comprises a pressure gauge, a pressure transmitter, a flowmeter, a CPU and an alarm, wherein the pressure gauge is used for measuring the pressure value in the gas pipeline, the pressure transmitter is used for transmitting the pressure value in the gas pipeline in different areas to the control layer, the flowmeter is used for measuring the change of the instantaneous flow and the total flow in the gas pipeline, the CPU is used for processing the data generated in the system, and the alarm is used for giving an alarm when the safety problem occurs in the gas pipeline;
the data storage layer is used for storing data generated when the system operates;
the control layer comprises an area dividing module, a gas flow monitoring module, a pipeline pressure measuring module, a safety evaluation module and an early warning module, wherein the area dividing module is used for dividing areas of a gas pipeline according to population density, the gas flow monitoring module is used for monitoring gas flow of a gas inlet and a gas outlet of the gas pipeline respectively, the pipeline pressure measuring module is used for measuring pressure values inside and outside the gas pipeline, the safety evaluation module is used for evaluating safety of the gas pipeline according to data provided by the gas flow monitoring module and the pipeline pressure measuring module, and the early warning module is used for judging and early warning safety of the gas pipeline according to results output by the safety evaluation module.
In this embodiment, the region division module includes a population density calculation strategy, and the population density calculation strategy includes the following specific steps:
s101, for the description in this embodimentThe gas pipeline laying areas were each measured 5 times for population density of the areas, in this example the areas wereThe population numbers of the 5 measurements are 48, 60, 42, 50 and 62 respectively;
s102, the average population density of the gas pipeline laying area is。
In this embodiment, the area division module further includes an area division policy, where the area division policy includes the following specific contents:
s201, whenWhen it is, then->Gas pipeline laying area->Add to collection->In the collection->Is a collection of densely populated areas;
s202, whenWhen it is, then->Gas pipeline laying area->Add to collection->In the collection->Is a collection of medium-sized regions of the population;
s203, whenWhen it is, then->Gas pipeline laying area->Add to collection->In the collection->Is a collection of sparsely populated areas.
In this embodiment, the region。
The implementation of the embodiment can be realized: and (3) carrying out regional division on the gas pipeline in a certain gas pipeline laying region by using a gas pipeline safety assessment and early warning system, a gas pipeline safety assessment and early warning method and a storage medium.
Example 2
The embodiment calculates the gas leakage speed of the gas pipeline laying area after the area division by using a gas pipeline safety assessment and early warning system, a gas pipeline safety assessment and early warning method and a storage medium, and the specific scheme is that, as shown in fig. 1 and fig. 2, the gas pipeline safety assessment and early warning system, the gas pipeline safety assessment and early warning method and the storage medium comprise an equipment layer, a data storage layer and a control layer;
the equipment layer comprises a pressure gauge, a pressure transmitter, a flowmeter, a CPU and an alarm, wherein the pressure gauge is used for measuring the pressure value in the gas pipeline, the pressure transmitter is used for transmitting the pressure value in the gas pipeline in different areas to the control layer, the flowmeter is used for measuring the change of the instantaneous flow and the total flow in the gas pipeline, the CPU is used for processing the data generated in the system, and the alarm is used for giving an alarm when the safety problem occurs in the gas pipeline;
the data storage layer is used for storing data generated when the system operates;
the control layer comprises an area dividing module, a gas flow monitoring module, a pipeline pressure measuring module, a safety evaluation module and an early warning module, wherein the area dividing module is used for dividing areas of a gas pipeline according to population density, the gas flow monitoring module is used for monitoring gas flow of a gas inlet and a gas outlet of the gas pipeline respectively, the pipeline pressure measuring module is used for measuring pressure values inside and outside the gas pipeline, the safety evaluation module is used for evaluating safety of the gas pipeline according to data provided by the gas flow monitoring module and the pipeline pressure measuring module, and the early warning module is used for judging and early warning safety of the gas pipeline according to results output by the safety evaluation module.
In this embodiment, the gas flow monitoring module includes monitoring the gas flow of the gas pipe gas inlet of the gas pipe laying areaAnd gas flow rate at the gas outlet->。
In this embodiment, the pipeline pressure measurement module includes measuring the absolute pressure of the gas pipeline in the gas pipeline laying region。
In this embodiment, the safety evaluation module includes determining whether a leakage hole exists in the gas pipeline according to a gas leakage amount of the gas pipeline, including the following specific contents:
s301, in the embodiment, the inner diameter of the gas pipeline in the gas pipeline laying area is；
S302, whenWhen in use, then->The gas pipelines of the gas pipeline laying areas normally run, and no leakage holes exist in the gas pipelines;
s303, whenWhen in use, then->The gas pipes of the individual gas pipe laying areas are abnormally operated, in the present embodiment, because +.>So it can be known that there are leakage holes in the gas channel;
s304, let the leakage aperture be。
In this embodiment, the security evaluation module further includes a gas pipeline gas leakage rate calculation strategy, where the gas pipeline gas leakage rate depends on the size of the gas pipeline leakage aperture, and the gas pipeline gas leakage rate calculation strategy includes the following specific steps:
s401, whenWhen the gas flow equation set of the gas pipeline is built +.>Wherein->For the absolute pressure of the gas line, +.>Is the density of the gas in the gas pipeline, +.>Is the gas constant of the gas pipeline>Is the temperature of the gas in the gas pipeline, +.>For the gas leakage rate of the gas pipeline, < >>Is a gas insulation index>Is a constant;
s402, solving the equation set in the step S401 in a combined way to obtain the gas flow velocity at the gas pipeline leakage hole, and obtaining the current value by differentiating the gas flow velocity at the gas pipeline leakage hole and the gas flow velocity in the gas pipelineAt the time of gas leakage rate of gas pipeline>Wherein->The gas density at the gas pipe leakage orifice is the pressure at the gas pipe leakage orifice>Wherein->Is at normal atmospheric pressure, in this example: />Then in this embodiment +.>When->In this case, the relation between the gas leakage rate of the gas pipe is as follows: />；
S403, whenWhen the gas flow equation set of the gas pipeline is built +.>When (when)At this time, the pressure at the leakage orifice of the gas line is +.>Equal to standard atmospheric pressure->Temperature at the leakage orifice of the gas line +.>Gas Density at gas pipe leakage hole>；
S404, calculating the formula in the step S403 to obtain: in the present embodiment, whenAt the time of gas leakage rate of gas pipeline>。
The implementation of the embodiment can be realized: the gas leakage rate of the gas pipeline laying area after the area division in embodiment 1 is calculated by using a gas pipeline safety evaluation and early warning system, a gas pipeline safety evaluation and early warning method and a storage medium.
Example 3
According to the embodiment, a critical value of gas leakage quantity of the gas pipeline is calculated on the basis of the embodiment 2 by using a gas pipeline safety evaluation and early warning system, a gas pipeline safety evaluation and early warning method and a storage medium, and the critical value is compared with the actual leakage quantity;
the equipment layer comprises a pressure gauge, a pressure transmitter, a flowmeter, a CPU and an alarm, wherein the pressure gauge is used for measuring the pressure value in the gas pipeline, the pressure transmitter is used for transmitting the pressure value in the gas pipeline in different areas to the control layer, the flowmeter is used for measuring the change of the instantaneous flow and the total flow in the gas pipeline, the CPU is used for processing the data generated in the system, and the alarm is used for giving an alarm when the safety problem occurs in the gas pipeline;
the data storage layer is used for storing data generated when the system operates;
the control layer comprises an area dividing module, a gas flow monitoring module, a pipeline pressure measuring module, a safety evaluation module and an early warning module, wherein the area dividing module is used for dividing areas of a gas pipeline according to population density, the gas flow monitoring module is used for monitoring gas flow of a gas inlet and a gas outlet of the gas pipeline respectively, the pipeline pressure measuring module is used for measuring pressure values inside and outside the gas pipeline, the safety evaluation module is used for evaluating safety of the gas pipeline according to data provided by the gas flow monitoring module and the pipeline pressure measuring module, and the early warning module is used for judging and early warning safety of the gas pipeline according to results output by the safety evaluation module.
In this embodiment, the security evaluation module further includes a gas leakage amount calculation strategy of the gas pipeline, where the gas leakage amount calculation strategy includes the following specific steps:
s501, whenDuring the process, the gas leakage amount of the gas pipeline is->Wherein->，/>Is the gas flow coefficient at the leakage hole of the gas pipeline, +.>；
S502, whenDuring the process, the gas leakage amount of the gas pipeline is->。
In this embodiment, the security evaluation module further includes a calculation strategy of a gas leakage amount critical value of the gas pipeline, where the calculation strategy of the gas leakage amount critical value of the gas pipeline includes the following specific steps:
s601, whenWhen in use, let->，/>The gas leakage threshold value of the gas pipeline>；
S602, whenWhen in use, let->Critical value of gas leakage quantity of gas pipeline。
In this embodiment, the security evaluation module further includes calculating a thirdGas pipeline gas actual leakage amount of each gas pipeline laying area +.>Then ∈10 in this embodiment>。
The implementation of the embodiment can be realized: a gas pipeline safety evaluation and early warning system, a gas pipeline safety evaluation and early warning method and a storage medium are used for calculating a critical value of gas leakage quantity of a gas pipeline, and comparing the critical value with an actual leakage quantity.
Example 4
The embodiment of the invention adopts a gas pipeline safety evaluation and early warning system, a gas pipeline safety evaluation and early warning method and a storage medium to evaluate and early warn the safety of a gas pipeline based on the embodiment 3, and the specific scheme is that, as shown in fig. 1, 2 and 3, the gas pipeline safety evaluation and early warning system, the gas pipeline safety evaluation and early warning method and the storage medium comprise an equipment layer, a data storage layer and a control layer;
the equipment layer comprises a pressure gauge, a pressure transmitter, a flowmeter, a CPU and an alarm, wherein the pressure gauge is used for measuring the pressure value in the gas pipeline, the pressure transmitter is used for transmitting the pressure value in the gas pipeline in different areas to the control layer, the flowmeter is used for measuring the change of the instantaneous flow and the total flow in the gas pipeline, the CPU is used for processing the data generated in the system, and the alarm is used for giving an alarm when the safety problem occurs in the gas pipeline;
the data storage layer is used for storing data generated when the system operates;
the control layer comprises an area dividing module, a gas flow monitoring module, a pipeline pressure measuring module, a safety evaluation module and an early warning module, wherein the area dividing module is used for dividing areas of a gas pipeline according to population density, the gas flow monitoring module is used for monitoring gas flow of a gas inlet and a gas outlet of the gas pipeline respectively, the pipeline pressure measuring module is used for measuring pressure values inside and outside the gas pipeline, the safety evaluation module is used for evaluating safety of the gas pipeline according to data provided by the gas flow monitoring module and the pipeline pressure measuring module, and the early warning module is used for judging and early warning safety of the gas pipeline according to results output by the safety evaluation module.
In this embodiment, the early warning module includes a gas pipeline security early warning policy, where the early warning policy includes the following specific contents:
s701, setting early warning grades to comprise primary early warning, secondary early warning and tertiary early warning;
s702, judging formula of primary early warning of gas pipeline safetyIf the judgment formula->If true, outputting true, and sending out a primary early warning alarm by the early warning module;
s703, judging formula of gas pipeline safety secondary early warningIf the judgment formula->If true, outputting true, and sending out a secondary early warning alarm by the early warning module;
s704, judging formula of three-level early warning of gas pipeline safetyIf the judgment formula->If true, the true is output, and the early warning module sends out three-level early warning alarms.
In this embodiment, the regionAnd->According to the gas pipeline safety early warning strategy, a judging formula of the gas pipeline safety secondary early warning is adoptedAnd if true, outputting true, and sending out a secondary early warning alarm by the early warning module.
The gas pipeline safety assessment and early warning method is realized based on a gas pipeline safety assessment and early warning system, and comprises the following specific steps:
s1, dividing areas of a gas pipeline according to population density;
s2, monitoring gas flow of a gas inlet and a gas outlet of a gas pipeline;
s3, measuring pressure values inside and outside the gas pipeline;
s4, evaluating the safety of the gas pipeline according to the data provided in the steps S2 and S3;
s5, judging and early warning the safety of the gas pipeline according to the output results of the steps S1 and S4.
The implementation of the embodiment can be realized: the safety evaluation and early warning system, method and storage medium for the gas pipeline are used for evaluating and early warning the safety of the gas pipeline based on the embodiment 3.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (14)
1. The utility model provides a gas pipeline security evaluation early warning system which characterized in that: the system comprises a device layer, a data storage layer and a control layer;
the equipment layer comprises a pressure gauge, a pressure transmitter, a flowmeter, a CPU and an alarm, wherein the pressure gauge is used for measuring the pressure value in the gas pipeline, the pressure transmitter is used for transmitting the pressure value in the gas pipeline in different areas to the control layer, the flowmeter is used for measuring the change of the instantaneous flow and the total flow in the gas pipeline, the CPU is used for processing the data generated in the system, and the alarm is used for giving an alarm when the safety problem occurs in the gas pipeline;
the data storage layer is used for storing data generated when the system operates;
the control layer comprises an area dividing module, a gas flow monitoring module, a pipeline pressure measuring module, a safety evaluation module and an early warning module, wherein the area dividing module is used for dividing areas of a gas pipeline according to population density, the gas flow monitoring module is used for monitoring gas flow of a gas inlet and a gas outlet of the gas pipeline respectively, the pipeline pressure measuring module is used for measuring pressure values inside and outside the gas pipeline, the safety evaluation module is used for evaluating safety of the gas pipeline according to data provided by the gas flow monitoring module and the pipeline pressure measuring module, and the early warning module is used for judging and early warning safety of the gas pipeline according to results output by the safety evaluation module.
2. The gas pipeline safety assessment and early warning system according to claim 1, wherein: the regional division module comprises a population density calculation strategy, wherein the population density calculation strategy comprises the following specific steps of:
s101, laying gas pipelineIndividual areas are measured separately->The population density of the sub-region is set at +.>The area->Is +.>First->The area->Interior (I)>The population of the secondary measurement is +.>Wherein->，/>；
S102, then the firstGas pipeline laying area->Is +.>。
3. The gas pipeline safety assessment and early warning system according to claim 2, wherein: the regional division module further comprises a regional division strategy, wherein the regional division strategy comprises the following specific contents:
s201, whenWhen it is, then->Gas pipeline laying area->Add to collection->In the collection->Is a collection of densely populated areas;
s202, whenWhen it is, then->Gas pipeline laying area->Add to collection->In the collection->Is a collection of medium-sized regions of the population;
s203, whenWhen it is, then->Gas pipeline laying area->Add to collection->In the collection->Is a collection of sparsely populated areas.
4. The gas pipeline safety assessment and early warning system according to claim 3, wherein: the gas flow monitoring module includes a monitoring firstGas flow at gas pipe inlets of individual gas pipe laying areas +.>And gas flow rate at the gas outlet->。
5. The gas pipeline safety assessment and early warning system according to claim 4, wherein: the pipeline pressure measurement module comprises a measurement firstIndividual gas pipesAbsolute pressure of gas line in road-laying region +.>。
6. The gas pipeline safety assessment and early warning system according to claim 5, wherein: the safety evaluation module comprises a step of judging whether a gas pipeline has a leakage hole according to the gas leakage quantity of the gas pipeline, and comprises the following specific contents:
s301, set upThe gas pipeline inner diameter of each gas pipeline laying area is +.>；
S302, whenWhen in use, then->The gas pipelines of the gas pipeline laying areas normally run, and no leakage holes exist in the gas pipelines;
s303, whenWhen in use, then->Abnormal operation of the gas pipelines in the gas pipeline laying areas, and leakage holes exist in the gas pipelines;
s304 is set as the firstWhen the gas pipeline of the gas pipeline laying area has leakage holes, the leakage hole diameter is +.>。
7. The gas pipeline safety assessment and early warning system according to claim 6, wherein: the safety evaluation module further comprises a gas pipeline gas leakage speed calculation strategy, wherein the gas pipeline gas leakage speed depends on the size of a gas pipeline leakage aperture, and the gas pipeline gas leakage speed calculation strategy comprises the following specific steps:
s401, whenWhen the gas flow equation set of the gas pipeline is built +.>Wherein->For the absolute pressure of the gas line, +.>Is the density of the gas in the gas pipeline, +.>Is the gas constant of the gas pipeline>Is the temperature of the gas in the gas pipeline, +.>For the gas leakage rate of the gas pipeline, < >>Is a gas insulation index>Is a constant;
s402, for the equation set in the step S401Simultaneously solving to obtain the gas flow velocity at the gas pipeline leakage hole, and obtaining the current value by differencing the gas flow velocity at the gas pipeline leakage hole and the gas flow velocity in the gas pipelineAt the time of gas leakage rate of gas pipeline>Wherein->The gas density at the gas pipe leakage orifice is the pressure at the gas pipe leakage orifice>Wherein->Is at standard atmospheric pressure;
s403, whenWhen the gas flow equation set of the gas pipeline is built +.>When->At this time, the pressure at the leakage orifice of the gas line is +.>Equal to standard atmospheric pressure->Temperature at the leak hole of the gas pipelineGas Density at gas pipe leakage hole>；
S404, calculating the formula in the step S403 to obtain: when (when)Gas leakage rate of gas pipeline。
8. The gas pipeline safety assessment and early warning system according to claim 7, wherein: the safety evaluation module further comprises a gas leakage amount calculation strategy of the gas pipeline, wherein the gas leakage amount calculation strategy of the gas pipeline comprises the following specific steps:
s501, whenDuring the process, the gas leakage amount of the gas pipeline is->Wherein->，/>Is the gas flow coefficient at the leakage hole of the gas pipeline, +.>；
S502, whenDuring the process, the gas leakage amount of the gas pipeline is->。
9. The gas pipeline safety assessment and early warning system according to claim 8, wherein: the safety evaluation module further comprises a calculation strategy of a gas leakage quantity critical value of the gas pipeline, and the calculation strategy of the gas leakage quantity critical value of the gas pipeline comprises the following specific steps:
s601, whenWhen in use, let->，/>Critical value of gas leakage quantity of gas pipeline；
S602, whenWhen in use, let->Critical value of gas leakage quantity of gas pipeline。
10. The gas pipeline safety assessment and early warning system according to claim 9, wherein: the security assessment module further includes computing a thirdGas pipeline gas actual leakage amount of each gas pipeline laying area +.>。
11. The gas pipeline safety assessment and early warning system according to claim 10, wherein: the early warning module comprises a gas pipeline safety early warning strategy, and the early warning strategy comprises the following specific contents:
s701, setting early warning grades to comprise primary early warning, secondary early warning and tertiary early warning;
s702, judging formula of primary early warning of gas pipeline safetyIf the judgment formula->If true, outputting true, and sending out a primary early warning alarm by the early warning module;
s703, judging formula of gas pipeline safety secondary early warningIf the judgment formula->If true, outputting true, and sending out a secondary early warning alarm by the early warning module;
s704, judging formula of three-level early warning of gas pipeline safetyIf the judgment formula->If true, the true is output, and the early warning module sends out three-level early warning alarms.
12. A gas pipeline safety assessment and early warning method, which is implemented based on the gas pipeline safety assessment and early warning system according to any one of claims 1-11, and is characterized in that: the method comprises the following specific steps:
s1, dividing areas of a gas pipeline according to population density;
s2, monitoring gas flow of a gas inlet and a gas outlet of a gas pipeline;
s3, measuring pressure values inside and outside the gas pipeline;
s4, evaluating the safety of the gas pipeline according to the data provided in the steps S2 and S3;
s5, judging and early warning the safety of the gas pipeline according to the output results of the steps S1 and S4.
13. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements a gas pipeline safety assessment and warning method as claimed in claim 12.
14. An apparatus, comprising:
a memory for storing instructions;
a processor for executing the instructions to cause the apparatus to perform operations for implementing a gas pipeline safety assessment and pre-warning method as set forth in claim 12.
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