CN112903211A - Equipment and method for detecting tightness of gas pipeline - Google Patents
Equipment and method for detecting tightness of gas pipeline Download PDFInfo
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- CN112903211A CN112903211A CN202110333084.0A CN202110333084A CN112903211A CN 112903211 A CN112903211 A CN 112903211A CN 202110333084 A CN202110333084 A CN 202110333084A CN 112903211 A CN112903211 A CN 112903211A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 25
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 34
- 238000004891 communication Methods 0.000 claims description 28
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000004458 analytical method Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000009897 systematic effect Effects 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 104
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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Abstract
The invention discloses a device and a method for detecting the tightness of a gas pipeline, and relates to a device and a method for detecting the tightness of a gas pipeline by monitoring the change relationship between the pressure and the temperature in the gas pipeline in the pressure test process. The device and the method automatically monitor pressure and temperature values at different moments in the pressure test process, calculate gas leakage amount by the central processing unit, and quantitatively detect the tightness of a gas pipeline after logical judgment according to the gas leakage amount.
Description
Technical Field
The invention relates to the technical field of gas safety, in particular to a device and a method for detecting tightness of a gas pipeline.
Background
With the popularization of natural gas, pipeline transportation is generally applied to natural gas transportation carriers as an efficient and low-cost means.
Before the production of town gas pipelines, in order to ensure the safe production and operation of the pipelines, relevant regulations require that the pipeline tightness test must be carried out after the pipelines are installed. At present, the tightness test of the gas pipeline mainly depends on testing personnel to detect related pressure parameters in the pressure test process through manual recording at regular time.
Because the pressure testing time is longer and requires to record the test parameter once at a specific time interval, the method has low efficiency and has larger risk of human error, and the reliability of the test result is reduced. Although the market also has equipment for automatically recording pressure parameters to reduce the defects of manual detection, when the pipeline size is large in some areas and the day and night temperature difference is obvious, the influence of the temperature on the detection result is not negligible, so that the detection result obtained by only depending on the pressure single parameter has the possibility of inaccuracy.
Disclosure of Invention
The invention provides a device and a method for detecting the tightness of a gas pipeline, wherein the device integrates a pressure monitoring module, a temperature monitoring module, a central processing unit and a communication module into a unified platform, provides the device and the method for detecting the tightness of the closed pipeline according to a gas state equation, and realizes the effect of tight monitoring.
A first aspect of an embodiment of the present invention provides an apparatus for detecting a tightness of a gas pipeline, where the apparatus includes:
the pressure monitoring module is used for acquiring gas pressure information in the gas pipeline;
the temperature monitoring module is used for acquiring gas temperature information in the gas pipeline;
the central processing unit is used for receiving the temperature and pressure information and calculating the gas leakage amount according to the temperature and pressure information and code instructions in an execution program; judging whether leakage occurs according to the gas leakage amount, and outputting a detection result signal after the judgment is finished;
and the communication module is used for receiving the detection result signal and sending corresponding alarm information.
A second aspect of the embodiments of the present invention provides a method for detecting the tightness of a gas pipeline, the method being applied to the apparatus for detecting the tightness of a gas pipeline as described above, the method including:
the central processing unit sends a pressure and temperature acquisition command, the pressure monitoring module executes a pressure acquisition action, and the temperature monitoring module executes a temperature acquisition action;
acquiring gas pressure information in a closed gas pipeline, specifically, acquiring gas pressure in the closed gas pipeline by a pressure monitoring module at specific time intervals in pressure test detection time;
acquiring temperature information of gas in a closed gas pipeline, specifically, acquiring the temperature of the gas in the closed gas pipeline by a temperature monitoring module at specific time intervals in pressure test detection time;
calculating the gas leakage amount according to the temperature and pressure information;
analyzing the tightness of the gas pipeline according to the gas leakage amount information;
and outputting a detection result or a leakage alarm signal according to the analysis result.
In a possible implementation manner of the second aspect, the step of calculating the gas leakage amount according to the temperature and pressure information includes:
acquiring gas leakage volume delta Vi during each acquisition according to a gas state equation by the following formula;
wherein the formula is:
in the above formula, Pi is the gas pressure in the pipeline at the time of the ith acquisition; vi is the equivalent volume of gas in the pipeline during the ith acquisition; ti is the gas temperature in the pipeline at the ith acquisition; zi is the gas compression factor in the pipeline during the ith acquisition; v0 is the measured equivalent volume of the gas pipeline.
In a possible implementation manner of the second aspect, the analyzing the tightness of the gas pipeline according to the information of the gas leakage amount specifically includes:
for any delta Vi, when | delta Vi | is less than delta, the central processing unit judges that the tightness of the gas pipeline is qualified;
and when the absolute value of delta Vi is more than or equal to delta, the central processing unit judges that the tightness of the gas pipeline is unqualified. Where δ is the systematic error introduced by the calculation and acquisition accuracy.
In a possible implementation manner of the second aspect, the step of outputting a detection result or a leakage alarm signal according to the analysis result specifically includes:
when the central processing unit judges that the tightness of the gas pipeline is qualified, the central processing unit sends a communication instruction to the communication module, and the communication module sends information of a qualified detection tightness result to a remote background or a tester;
when the central processing unit judges that the tightness of the gas pipeline is unqualified, the central processing unit sends a communication instruction to the communication module, and the communication module sends a detection tightness unqualified result and leakage warning information to a remote background or a tester.
Compared with the prior art, the device and the method for detecting the tightness of the gas pipeline provided by the embodiment of the invention have the beneficial effects that: the invention can introduce the temperature as the basic calculation parameter, can calculate the gas leakage quantity of the pipeline according to the gas state equation to judge whether the leakage exists, and avoids the error caused by neglecting the influence of the temperature on the pressure due to overlong pipeline or overlarge day and night temperature difference; meanwhile, the gas leakage amount of the pipeline can be automatically acquired, stored and calculated, errors caused by manual reading and calculation are avoided, the accuracy and the reliability of a detection result are improved, the labor cost is greatly reduced, and the working efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for detecting the tightness of a gas pipeline according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for detecting the tightness of a gas pipeline according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating an operation of a method for detecting the tightness of a gas pipeline according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Because the current pressure test time is longer and requires to record test parameters once at specific time intervals, the method has low efficiency and large risk of human error, and the reliability of the test result is reduced. Although the market also has equipment for automatically recording pressure parameters to reduce the defects of manual detection, when the pipeline size is large in some areas and the day and night temperature difference is obvious, the influence of the temperature on the detection result is not negligible, so that the detection result obtained by only depending on the pressure single parameter has the possibility of inaccuracy.
In order to solve the above problem, the following specific embodiments will describe and explain a device for detecting the tightness of a gas pipeline provided in the embodiments of the present application.
Referring to fig. 1, a schematic structural diagram of an apparatus for detecting the tightness of a gas pipeline according to an embodiment of the present invention is shown.
Wherein, as an example, the device for detecting the gas pipeline tightness may include:
the pressure monitoring module is used for acquiring gas pressure information in the gas pipeline;
the temperature monitoring module is used for acquiring gas temperature information in the gas pipeline;
the central processing unit is used for receiving the temperature and pressure information and calculating the gas leakage amount according to the temperature and pressure information and code instructions in an execution program; judging whether leakage occurs according to the gas leakage amount, and outputting a detection result signal after the judgment is finished;
and the communication module is used for receiving the detection result signal and sending corresponding alarm information.
In this embodiment, an embodiment of the present invention provides an apparatus for detecting tightness of a gas pipeline, which has the following beneficial effects: the invention can introduce the temperature as the basic calculation parameter, can calculate the gas leakage quantity of the pipeline according to the gas state equation to judge whether the leakage exists, and avoids the error caused by neglecting the influence of the temperature on the pressure due to overlong pipeline or overlarge day and night temperature difference; meanwhile, the gas leakage amount of the pipeline can be automatically acquired, stored and calculated, errors caused by manual reading and calculation are avoided, the accuracy and the reliability of a detection result are improved, the labor cost is greatly reduced, and the working efficiency is improved.
Referring to fig. 2, a schematic flow chart of a method for detecting the tightness of a gas pipeline according to an embodiment of the present invention is shown.
In this embodiment, the method can be applied to the device for detecting the tightness of a gas pipeline as described in the above embodiments.
By way of example, the method for detecting the tightness of the gas pipeline may include:
s11, the central processing unit sends pressure and temperature acquisition instructions, the pressure monitoring module executes pressure acquisition actions, and the temperature monitoring module executes temperature acquisition actions.
S12, obtaining gas pressure information in the closed gas pipeline, specifically, in the pressure test detection time, obtaining the gas pressure in the closed gas pipeline by the pressure monitoring module at a specific time interval.
S13, obtaining the temperature information of the gas in the closed gas pipeline, specifically, in the pressure test detection time, obtaining the temperature of the gas in the closed gas pipeline by the temperature monitoring module at a specific time interval.
And S14, calculating the gas leakage amount according to the temperature and pressure information.
As an example, step S14 may include:
acquiring gas leakage volume delta Vi during each acquisition according to a gas state equation by the following formula;
wherein the formula is:
in the above formula, Pi is the gas pressure in the pipeline at the time of the ith acquisition; vi is the equivalent volume of gas in the pipeline during the ith acquisition; ti is the gas temperature in the pipeline at the ith acquisition; zi is the gas compression factor in the pipeline during the ith acquisition; v0 is the measured equivalent volume of the gas pipeline.
And S15, analyzing the tightness of the gas pipeline according to the gas leakage amount information.
As an example, step S15 may include:
for any delta Vi, when | delta Vi | is less than delta, the central processing unit judges that the tightness of the gas pipeline is qualified;
and when the absolute value of delta Vi is more than or equal to delta, the central processing unit judges that the tightness of the gas pipeline is unqualified. Where δ is the systematic error introduced by the calculation and acquisition accuracy.
And S16, outputting a detection result or a leakage alarm signal according to the analysis result.
As an example, step S16 may include:
when the central processing unit judges that the tightness of the gas pipeline is qualified, the central processing unit sends a communication instruction to the communication module, and the communication module sends information of qualified detection tightness results to a remote background or testing personnel.
When the central processing unit judges that the tightness of the gas pipeline is unqualified, the central processing unit sends a communication instruction to the communication module, and the communication module sends a detection tightness unqualified result and leakage warning information to a remote background or a tester.
Referring to fig. 3, an operation flow chart of a method for detecting the tightness of a gas pipeline according to an embodiment of the present invention is shown.
In actual operation, the central processing unit sends acquisition instructions to the pressure monitoring module and the temperature monitoring module at intervals of specific time respectively, the pressure monitoring module acquires the gas pressure in the pipeline, and the temperature acquisition module acquires the gas temperature in the pipeline. After the collection is finished, the pressure and temperature data are transmitted to a central processing unit, the gas leakage amount in each collection is calculated according to a gas state equation, the following formula is specifically calculated,
i∈N* (2)
in the formula, Pi is the gas pressure in the pipeline during the ith acquisition; vi is the equivalent volume of gas in the pipeline during the ith acquisition; ti is the gas temperature in the pipeline at the ith acquisition; zi is the gas compression factor in the pipeline during the ith acquisition; c is a constant. When i is 1, i.e. the initial acquisition, Vi is V0, where V0 is the closed conduit equivalent volume. Then there is a change in the number of,
calculating the gas leakage quantity delta Vi in the pipeline at each acquisition by the formulas (1) and (3),
considering the calculation and the acquisition precision, the following logic judgment is executed after the calculation is finished:
(1) for any delta Vi, when | delta Vi | is less than delta, namely air leakage is not detected, the tightness of the gas pipeline is qualified, the central processing unit sends a communication instruction to the communication module, and the communication module sends information of qualified tightness detection results to a remote background or testers, wherein delta brings system errors for calculation and acquisition precision;
(2) when | delta Vi | > is larger than or equal to delta, namely air leakage exists, the tightness of the gas pipeline is unqualified, the central processing unit sends a communication instruction to the communication module, and the communication module sends a detection tightness unqualified result and leakage alarm information to a remote background or testing personnel.
In this embodiment, the embodiment of the present invention provides a method for detecting the tightness of a gas pipeline, which has the following beneficial effects: the invention can introduce the temperature as the basic calculation parameter, can calculate the gas leakage quantity of the pipeline according to the gas state equation to judge whether the leakage exists, and avoids the error caused by neglecting the influence of the temperature on the pressure due to overlong pipeline or overlarge day and night temperature difference; meanwhile, the gas leakage amount of the pipeline can be automatically acquired, stored and calculated, errors caused by manual reading and calculation are avoided, the accuracy and the reliability of a detection result are improved, the labor cost is greatly reduced, and the working efficiency is improved.
Further, an embodiment of the present application further provides an electronic device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method for detecting the gas pipeline tightness as described in the above embodiments when executing the program.
Further, the present application also provides a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the method for detecting the gas pipeline tightness according to the foregoing embodiment.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. An apparatus for detecting the tightness of a gas pipeline, said apparatus comprising:
the pressure monitoring module is used for acquiring gas pressure information in the gas pipeline;
the temperature monitoring module is used for acquiring gas temperature information in the gas pipeline;
the central processing unit is used for receiving the temperature and pressure information and calculating the gas leakage amount according to the temperature and pressure information and code instructions in an execution program; judging whether leakage occurs according to the gas leakage amount, and outputting a detection result signal after the judgment is finished;
and the communication module is used for receiving the detection result signal and sending corresponding alarm information.
2. A method for detecting the tightness of a gas pipe, which is applied to the apparatus for detecting the tightness of a gas pipe according to claim 1, comprising:
the central processing unit sends a pressure and temperature acquisition command, the pressure monitoring module executes a pressure acquisition action, and the temperature monitoring module executes a temperature acquisition action;
acquiring gas pressure information in a closed gas pipeline, specifically, acquiring gas pressure in the closed gas pipeline by a pressure monitoring module at specific time intervals in pressure test detection time;
acquiring temperature information of gas in a closed gas pipeline, specifically, acquiring the temperature of the gas in the closed gas pipeline by a temperature monitoring module at specific time intervals in pressure test detection time;
calculating the gas leakage amount according to the temperature and pressure information;
analyzing the tightness of the gas pipeline according to the gas leakage amount information;
and outputting a detection result or a leakage alarm signal according to the analysis result.
3. The method for detecting the tightness of a gas pipeline according to claim 2, wherein the specific step of calculating the gas leakage amount according to the temperature and pressure information comprises:
acquiring gas leakage volume delta Vi during each acquisition according to a gas state equation by the following formula;
wherein the formula is:
in the above formula, Pi is the gas pressure in the pipeline at the time of the ith acquisition; vi is the equivalent volume of gas in the pipeline during the ith acquisition; ti is the gas temperature in the pipeline at the ith acquisition; zi is the gas compression factor in the pipeline during the ith acquisition; v0 is the measured equivalent volume of the gas pipeline.
4. The method for detecting the tightness of a gas pipeline according to claim 2, wherein the specific step of analyzing the tightness of the gas pipeline according to the information of the gas leakage amount comprises:
for any delta Vi, when | delta Vi | is less than delta, the central processing unit judges that the tightness of the gas pipeline is qualified;
and when the absolute value of delta Vi is more than or equal to delta, the central processing unit judges that the tightness of the gas pipeline is unqualified. Where δ is the systematic error introduced by the calculation and acquisition accuracy.
5. The method for detecting the tightness of a gas pipeline according to claim 2, wherein said specific step of outputting a detection result or a leakage alarm signal according to the result of said analysis comprises:
when the central processing unit judges that the tightness of the gas pipeline is qualified, the central processing unit sends a communication instruction to the communication module, and the communication module sends information of a qualified detection tightness result to a remote background or a tester;
when the central processing unit judges that the tightness of the gas pipeline is unqualified, the central processing unit sends a communication instruction to the communication module, and the communication module sends a detection tightness unqualified result and leakage warning information to a remote background or a tester.
6. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the method for detecting the gas duct tightness according to any one of claims 2 to 5 when executing said program.
7. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the method for detecting gas pipeline tightness according to any one of claims 2 to 5.
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