CN111578149B - Gas pipeline leakage monitoring method, device and system and storage medium - Google Patents
Gas pipeline leakage monitoring method, device and system and storage medium Download PDFInfo
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- CN111578149B CN111578149B CN202010452021.2A CN202010452021A CN111578149B CN 111578149 B CN111578149 B CN 111578149B CN 202010452021 A CN202010452021 A CN 202010452021A CN 111578149 B CN111578149 B CN 111578149B
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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
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
Abstract
The application relates to the field of gas, in particular to a gas pipeline leakage monitoring method, device and system and a storage medium. The gas transmission of the gas pipeline between the pressure regulating box and the user side is cut off when the preset condition is met, so that the gas pipeline between the pressure regulating box and the user side can form a closed pipeline space, and therefore a plurality of pressure data of the gas pipeline within the preset time can be detected by using a pressure maintaining test method and compared with the preset value. And then according to the comparison result of a plurality of pressure data and default, judge whether take place the gas and leak or whether have the gas and leak the risk to cut off or open the gas transmission in the pipeline in time. By adopting the method, the gas pipeline can be monitored, and the problem of gas pipeline leakage can be found as soon as possible, so that intervention is performed in advance, and a basis is provided for further searching leakage points.
Description
Technical Field
The application relates to the field of gas, in particular to a gas pipeline leakage monitoring method, device and system and a storage medium.
Background
With the large-area popularization and use of natural gas, gas safety accidents are more and more, the serious influence endangers users and public safety, and pipeline leakage is one of the main reasons causing the gas safety accidents.
Generally, a gas pipeline is led into a room from an outdoor pipeline through a vertical pipe and a branch pipe, and then is connected to gas equipment through a meter front valve, a meter, a hose and the like, and in the process of gas conveying, the possibility of gas leakage exists in the use process of the pipeline, the branch node, each connection point, the equipment and the like. And gas leakage may also occur in various situations such as installation, aging, quality, human and external damage, etc. After the gas leaks, the gas can explode when reaching a certain concentration range and meeting a fire point.
At present, the pipeline leakage inspection mostly adopts a gas detection mode, detection needs to be carried out along the pipeline, the workload is very large, and the efficiency is low.
Disclosure of Invention
An object of the embodiment of the application is to provide a gas pipeline leakage monitoring method, device, system and storage medium, which can monitor the gas transmission condition in advance and provide a basis for further searching for leakage points.
In a first aspect, the present application provides a gas pipeline leakage monitoring method, comprising:
cutting off the gas transmission of a gas pipeline between the pressure regulating box and the user side when the preset condition is met;
after the gas transmission is cut off, detecting a plurality of pressure data of the gas pipeline in a preset time, and comparing the pressure data with a preset value;
and controlling to cut off the gas transmission in the pipeline or open the gas transmission in the pipeline according to the comparison result of the plurality of pressure data and the preset value.
The gas transmission of the gas pipeline between the pressure regulating box and the user side is cut off when the preset conditions are met, so that the gas pipeline between the pressure regulating box and the user side can form a closed pipeline space, and a plurality of pressure data of the gas pipeline within the preset time can be detected by using a pressure maintaining test method and compared with the preset value; and then according to the comparison result of a plurality of pressure data and default, judge whether take place the gas and leak or whether have the gas and leak the risk to cut off or open the gas transmission in the pipeline in time. By adopting the method, the gas pipeline can be monitored, and the problem of gas pipeline leakage can be found as soon as possible, so that intervention is performed in advance, and a basis is provided for further searching leakage points.
In other embodiments of the present application, the preset condition includes a preset time period;
or the preset condition comprises that the flow value in the gas pipeline between the pressure regulating tank and the user side is lower than a preset flow value;
alternatively, the preset conditions include: and the background server sends out a valve closing instruction.
In other embodiments of the present application, the preset time is a detection period, the pressure data is a pressure value, a plurality of pressure values of the gas pipeline in the preset time are detected, and the step of comparing the pressure values with the preset value includes:
detecting a plurality of pressure values of the gas pipeline in a detection period, and calculating the difference value between the maximum pressure value and the minimum pressure value in the plurality of pressure values; comparing the difference value with a preset value;
or, the preset time is a detection period, the pressure data is a pressure value after temperature correction, a plurality of pressure data of the gas pipeline in the preset time are detected, and the pressure data is compared with the preset value, and the method comprises the following steps:
detecting a plurality of pressure values and temperature values of the gas pipeline in a detection period, correcting the pressure values by using the temperature values, and calculating a difference value between a corrected maximum pressure value and a corrected minimum pressure value; and comparing the difference value with a preset value.
In other embodiments of the present application, the step of correcting the plurality of pressure values by using the temperature value includes correcting according to the following formula:
P correction ＝PT 0 /T n
In the formula, T 0 The temperature is the temperature collected for the first time; t is n The temperature collected for the nth time; p is the pressure value at the point of collection of the pipeline.
In other embodiments of the present application, the above comparison result is: a is 3 ＞P max -P min When the gas is in use, the gas transmission is started;
when the comparison result is: a is a 2 ＞P max -P min ＞a 3 Then, the second test is carried out, if the comparison result obtained by the second test is a 2 ＞P max -P min ＞a 3 After the second test is finished, the gas transmission is started;
when the comparison result is: a is 1 ＞P max -P min ＞a 2 When the test is finished, the second test is carried out, and the gas transmission is kept cut off after the second test is finished;
when the comparison result is: p is max -P min ＞a 1 When the gas is not transmitted, the gas transmission is kept cut off;
wherein, P max At the maximum pressure value, P min Is the minimum pressure value, a 1 、a 2 And a 3 Is a preset value, a 1 ＞a 2 ＞a 3 。
In other embodiments of the present application, an alarm is issued while the gas transmission is kept shut off.
In a second aspect, the present application provides a gas pipeline leakage monitoring device, which is applied to the gas pipeline leakage monitoring method, and the device includes:
the valve is used for being arranged on a gas pipeline between the pressure regulating box and the user side;
the sensor is used for detecting gas pressure data in the gas pipeline;
the controller is used for controlling the valve to cut off the gas transmission of the gas pipeline between the pressure regulating box and the user side when preset conditions are met; and the control device is used for controlling the opening or closing of a valve arranged on a gas pipeline between the pressure regulating box and the user side according to the comparison result of the pressure data detected by the sensor after the gas transmission is cut off and the preset value.
This gas pipeline leakage monitoring equipment can cut off the gas transmission of the gas pipeline between pressure regulating box and the user side through setting up the valve. Gas pressure data in the gas pipeline can be detected by arranging the sensor. The controller can be used for controlling the valve to cut off the gas transmission of the gas pipeline between the pressure regulating box and the user side when preset conditions are met; and the control device is used for controlling the opening or closing of a valve arranged on a gas pipeline between the pressure regulating box and the user side according to the comparison result of the pressure data detected by the sensor after the gas transmission is cut off and the preset value. Therefore, the device can realize the method, realize the gas pipeline monitoring, hopefully discover the problem of gas pipeline leakage as soon as possible, intervene in advance, and greatly reduce the workload of gas pipeline leakage investigation.
In other embodiments of the present application, the plurality of pressure data includes a plurality of pressure data detected in one detection period; the plurality of pressure data are pressure values or pressure values after temperature correction;
the sensor is used for detecting a plurality of pressure values in the pipeline; the controller is used for comparing the difference value of the maximum value and the minimum value in the plurality of pressure values with a preset value; the sensor is a pressure sensor; or
The controller is used for calculating to obtain a plurality of temperature corrected pressure values according to the plurality of pressure values and the plurality of temperature values, and comparing the difference value between the maximum value and the minimum value in the plurality of temperature corrected pressure values with a preset value; the sensor comprises a relative pressure sensor and a temperature sensor, or the sensor comprises an absolute pressure sensor and a temperature sensor, or the sensor is a temperature and pressure integrated sensor.
In other embodiments of the present application, the controller is configured to send a first control signal for opening gas transmission in the pipeline and a second control signal for keeping gas transmission in the pipeline cut off to the valve according to the comparison result;
when the comparison result is: a is 3 ＞P max -P min When the valve is opened, the controller sends a first control signal to the valve;
when the comparison result is: a is 2 ＞P max -P min ＞a 3 Then, the second test is carried out, if the comparison result obtained by the second test is a 2 ＞P max -P min ＞a 3 After the second test is finished, the controller sends a first control signal to the valve;
when the comparison result is: a is a 1 ＞P max -P min ＞a 2 Then, the second test is performedAfter the second test is finished, the controller sends a second control signal to the valve;
when the comparison result is: p max -P min ＞a 1 When the valve is closed, the controller sends a second control signal to the valve;
wherein, P max For maximum pressure data, P min Is the minimum pressure data of the pressure data, a 1 、a 2 And a 3 Is a preset value, a 1 ＞a 2 ＞a 3 。
In other embodiments of the present application, the valve body of the valve has an air inlet end and an air outlet end, and the air inlet end is used for connecting the pressure regulating tank; the air outlet end is used for connecting a user side;
the sensor is arranged at the air outlet end of the valve body; and/or
The gas pipeline leakage monitoring equipment still includes: and the alarm device is used for giving an alarm when the gas transmission is kept cut off.
In other embodiments of the present application, the gas pipeline leakage monitoring device further includes: a flow detection module;
the flow detection module is used for detecting the flow in a gas pipeline between the pressure regulating box and the user side.
In a third aspect, the present application provides a gas pipeline leakage monitoring system including the above gas pipeline leakage monitoring device provided in the second aspect; and
and the background server is in wireless communication with the controller and is used for receiving the data transmitted by the controller.
Through being connected gas pipeline leakage monitoring equipment and backend server wireless communication for backend server can receive the data of controller transmission, thereby backend server can make other operations according to the data received. The operation may be set according to the requirement of the user, for example, the remote control of the controller of the front-end device by the background server may be set. Therefore, the system can realize remote monitoring of the front-end equipment, realize monitoring of the gas pipeline, and hopefully discover the problem of gas pipeline leakage as soon as possible, thereby intervening in advance. And the workload of leakage investigation of the gas pipeline can be greatly reduced.
In a fourth aspect, the present application provides a computer readable storage medium storing a computer program executable by a processor, the computer program, when executed by the processor, implementing the steps of the gas pipeline leakage monitoring method as described above.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic flow chart of a gas pipeline leakage monitoring method provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a gas pipeline leakage monitoring system provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a connection pipe of a gas pipeline leakage monitoring system provided in an embodiment of the present application.
An icon: 10-gas pipeline leakage monitoring equipment; 11-a pressure regulating box; 12-a user terminal; 13-a gas pipeline; 100-a valve; 110-a valve body; 101-an air inlet end; 102-an outlet port; 103-flange plate; 120-a controller; 130-a sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, an embodiment of the present application provides a gas pipeline leakage monitoring method, including:
cutting off the gas transmission of a gas pipeline between the pressure regulating box and the user side when the preset conditions are met;
after the gas transmission is cut off, detecting a plurality of pressure data of the gas pipeline within a preset time, and comparing the pressure data with a preset value;
and controlling to cut off the gas transmission in the pipeline or open the gas transmission in the pipeline according to the comparison result of the plurality of pressure data and the preset value.
The gas transmission of the gas pipeline between the pressure regulating box and the user side is cut off when the preset conditions are met, so that the gas pipeline between the pressure regulating box and the user side can form a closed pipeline space, and a plurality of pressure data of the gas pipeline within the preset time can be detected by using a pressure maintaining test method and compared with the preset value; and then according to the comparison result of a plurality of pressure data and default, judge whether take place the gas and leak or whether have the gas and leak the risk to cut off or open the gas transmission in the pipeline in time. By adopting the method, the gas pipeline can be monitored, and the problem of gas pipeline leakage can be found as soon as possible, so that intervention is performed in advance, and a basis is provided for further searching leakage points. Compared with the prior art, the method for detecting along the pipeline when the pipeline leaks greatly reduces the workload, and more specifically, the method can intervene in advance through monitoring, and is expected to reduce unsafe risks caused by gas pipeline leakage.
Further, the user terminals include, but are not limited to, ranges of users in each building in a community or a shopping mall and other devices using gas.
Further, in some embodiments of the present application, the preset condition includes a preset time period. Cut off the gas transmission of the gas pipeline between pressure regulating box and the user side in the time quantum that predetermines.
Further, the preset time period comprises: timing or time setting is adopted.
Illustratively, the gas transmission of the gas pipeline between the pressure regulating tank and the user end is cut off at regular time intervals within a time period of 2:00-4:00 in the morning every day. In this time quantum, the possibility that the user used the gas is less, cuts off the gas, carries out the pressurize test, can hardly influence user's use.
Or, the time is set to cut off the gas transmission of the gas pipeline between the pressure regulating tank and the user side through communication with the user, for example, the gas transmission of the gas pipeline between the pressure regulating tank and the user side is preset to be cut off at 9:00-11:00 am on a working day; and cutting off the gas transmission of the gas pipeline between the pressure regulating box and the user side in the weekend early morning at a time period of 2:00-4: 00.
Through the gas transmission of cutting off the gas pipeline between the pressure regulating box and the user side within the preset time, a large amount of gas data can be guaranteed to be obtained, and therefore the accuracy of subsequent analysis is improved.
In some embodiments of the present application, the preset condition includes detecting that a flow value in a gas pipeline between the pressure regulating tank and the user terminal is lower than a preset flow value.
Illustratively, before the gas transmission of the gas pipeline between the pressure regulating tank and the user end is cut off, the flow value in the gas pipeline between the pressure regulating tank and the user end is detected, and when the gas is detected not to be used by the user, the gas transmission in the gas pipeline between the pressure regulating tank and the user end is cut off.
Through setting up flow detection, can cut off the gas transmission, carry out the pressurize test before, detect the user earlier and whether using the gas, if detect the user and do not use the gas, cut off the gas again and carry out the pressurize test to can avoid influencing user's normal use.
Further, in some optional embodiments of the present application, by detecting traffic (for example, by adding a traffic module to perform traffic detection), if there is traffic all the time, it is proved that there is a possibility of leakage, and in this case, instruction detection may be performed by the background server according to a situation.
Illustratively, the gas transmission of the gas pipeline between the pressure regulating box and the user end is cut off at regular time intervals within 2:00-4:00 each morning. And before cutting off, detect the flow in the gas pipeline first, if the flow testing result shows that the user is not using the gas, cut off the gas transmission of the gas pipeline between pressure regulating box and the user. Thereby further avoiding influencing the normal use of the user.
Further, in some embodiments of the present application, the preset time is a detection period, the pressure data is a pressure value, a plurality of pressure values of the gas pipeline in the preset time are detected, and the step of comparing the pressure values with the preset value includes:
detecting a plurality of pressure values of the gas pipeline in a detection period, and calculating a difference value between a maximum pressure value and a minimum pressure value in the plurality of pressure values; and comparing the difference value with a preset value.
Further optionally, in a detection period, continuously acquiring a plurality of pressure data at the same time interval, then taking the maximum value and the minimum value of the plurality of pressure data, calculating the difference between the maximum value and the minimum value, then comparing the difference with a preset value, and controlling to keep cutting off the gas transmission in the pipeline or open the gas transmission in the pipeline according to the comparison result of the plurality of pressure data and the preset value.
By judging the difference value between the maximum value and the minimum value in the pressure data in a detection period and comparing the difference value with a preset value, the pressure value change of a gas pipeline between the pressure regulating box and a user side in the detection period can be judged, so that a favorable basis is provided for judging whether gas leakage exists in the pipeline.
Illustratively, a test cycle is set to 60 minutes, with pressure data being collected every 60 seconds. Then, the maximum value and the minimum value in the collected multiple pressure data are found out, and the difference value of the maximum value and the minimum value is calculated. And then comparing the difference value with a preset value, and controlling to keep cutting off the gas transmission in the pipeline or opening the gas transmission in the pipeline according to the comparison result of the plurality of pressure data and the preset value.
In some embodiments of the present application, the preset time is a detection period, the pressure data is a pressure value after temperature correction, a plurality of pressure data of the gas pipeline in the preset time are detected, and the step of comparing the pressure data with the preset value includes:
detecting a plurality of pressure values and temperature values of the gas pipeline in a detection period, correcting the pressure values by using the temperature values, and calculating a difference value between a corrected maximum pressure value and a corrected minimum pressure value; and comparing the difference value with a preset value.
Since the temperature has an influence on the pressure value, in order to improve the detection accuracy, the temperature correction needs to be performed on the acquired pressure value. When the conventional detection is carried out at present, the influence of the temperature on the gas pressure is not considered, so that the accuracy of the leakage detection of the gas pipeline is low at present, and the result referential performance is influenced.
Further, a plurality of pressure values and a plurality of temperature values are simultaneously collected by using relative pressure sensors. And a pressure sensor and a temperature sensor can be used for respectively acquiring a pressure value and a temperature value in the gas pipeline.
Further, a plurality of temperature corrected pressure values are calculated according to the plurality of pressure values and the plurality of temperature values.
In some embodiments of the present application, a plurality of temperature-corrected pressure values are calculated according to a plurality of pressure values and a plurality of temperature values, and the calculation is performed according to the following method:
setting a detection period to be 60 minutes, and recording the pressure value acquired for the first time as P 0 And acquiring a pressure value every 60 seconds, and recording the pressure value as: p is 1 、P 2 、P 3 、P 4 、P 5 …P n (ii) a The temperature collected for the first time is recorded as T 0 And acquiring a temperature value every 60 seconds, and recording the temperature value as: t is a unit of 1 、T 2 、T 3 、T 4 、T 5 …T n 。
PV/T ═ constant (1)
In the formula (1), P is any pressure value of a pipeline collecting point, V is the pipeline volume, and T is the temperature when the pressure is collected at the collecting point. From the equation (1), the pressure value P after any temperature correction can be deduced Correction Comprises the following steps:
P correction ＝PT 0 /T n (2)
In formula (2), T 0 The temperature is the first acquired temperature; t is n The temperature collected for the nth time.
Further, according to the comparison result, the step of controlling to keep cutting off or opening the gas transmission in the pipeline comprises the following steps:
when the comparison result is: a is a 3 ＞P max -P min When the gas is in use, the gas transmission is started;
when the comparison result is: a is a 2 ＞P max -P min ＞a 3 Then, the second test is carried out, if the comparison result obtained by the second test is a 2 ＞P max -P min ＞a 3 After the second test is finished, the gas transmission is started;
when the comparison result is: a is 1 ＞P max -P min ＞a 2 When the test is finished, the second test is carried out, and the gas transmission is kept cut off after the second test is finished;
when the comparison result is: p max -P min ＞a 1 When the gas is not transmitted, the gas transmission is kept cut off;
wherein, P max At the maximum pressure value, P min Is the minimum pressure value, a 1 、a 2 And a 3 Is a preset value, a 1 ＞a 2 ＞a 3 。
It should be noted that the second test mentioned above refers to: and detecting a plurality of pressure data of the gas pipeline within the preset time, and comparing the pressure data with the preset value to obtain a new comparison result.
According to the comparison result of the plurality of pressure data and the preset value, the gas transmission is controlled to be kept cut off or opened, so that the gas leakage condition can be found in time, and the risk is expected to be reduced.
Further, when the comparison result is: a is a 3 ＞P max -P min And then, the gas transmission is controlled to be started by the background server, and the user can use the gas normally.
When the comparison result is: a is a 2 ＞P max -P min ＞a 3 And judging the leakage to be suspected, and performing a second test: collecting pressure data of one period again, and calculating the difference value between the maximum pressure value and the minimum pressure value; and comparing and judging the difference value with a preset reference difference value. Then after the second test, whether the second result is qualified or not (if < a) 2 ) And after the test is finished, gas transmission is started.
Furthermore, the data can be uploaded to a background server, and the background server confirms another time point to perform pressure maintaining test according to the received comparison result and determines whether to perform field detection and processing according to subsequent conditions.
When the comparison result is: a is 1 ＞P max-Pmin ＞a 2 And judging that the leakage is suspected, and continuously carrying out a second test: collecting pressure data of one period again, and calculating the difference value between the maximum pressure value and the minimum pressure value; and comparing and judging the difference value with a preset reference difference value. Then after the second test is finished, the gas is kept cut off.
When the comparison result is: when Pmax-Pmin is more than a1, judging the gas leakage, immediately uploading the comparison result, and keeping the gas cut-off after the test is finished.
In some embodiments of the present application, the preset conditions include: and the background server sends out a valve closing instruction. When the background server sends out an instruction for closing the valve, the fuel gas transmission of the fuel gas pipeline between the pressure regulating box and the user side is cut off; after the gas transmission is cut off, detecting a plurality of pressure data of the gas pipeline within a preset time, and comparing the pressure data with a preset value; and then controlling to keep cutting off the gas transmission in the pipeline or opening the gas transmission in the pipeline according to the comparison result of the plurality of pressure data and the preset value.
Further, when the gas transmission is kept cut off, an alarm is issued.
In some embodiments of the present application, the background server may alarm after receiving the data.
In some embodiments, the background server sends out an alarm signal, so that relevant personnel can timely go to the site for detection and processing.
In some embodiments, the background server sends alarm information to terminal devices such as mobile phones of related maintainers, so that the related maintainers can timely go to a site for detection and processing.
In other embodiments of the present application, an alarm device may be provided to alarm when the gas transmission is kept cut off.
Referring to fig. 2 and 3, in some embodiments of the present application, there is provided a gas pipeline leakage monitoring apparatus 10 applied to the gas pipeline leakage monitoring method of the foregoing embodiments, the gas pipeline leakage monitoring apparatus 10 including a valve 100, a sensor 130, and a controller 120.
Further, the valve 100 is adapted to be installed on the gas pipe 13 between the pressure regulating tank 11 and the user terminal 12.
Further, the sensor 130 is used to detect gas pressure data within the gas pipeline 13.
Further, the controller 120 is configured to control the valve 100 when a preset condition is satisfied. To cut off the gas transmission of the gas pipeline 13 between the pressure regulating tank 11 and the user terminal 12. And a controller for controlling the opening or closing of the valve 100 installed on the gas pipeline 13 between the pressure regulating tank 11 and the user terminal 12 according to the comparison result of the pressure data detected by the sensor 130 after the gas transmission is cut off and the preset value.
In this system, the valve 100 is provided to cut off the gas transmission in the gas pipe 13 between the pressure regulating tank 11 and the user terminal 12. The sensor 130 is arranged to detect the gas pressure data in the gas pipeline 13, and the controller 120 is arranged to control the valve 100 to cut off the gas transmission of the gas pipeline 13 between the pressure regulating tank 11 and the user end 12 when a preset condition is met; and a controller for controlling opening or closing of the valve 100 installed on the gas pipe 13 between the pressure-regulating tank 11 and the user terminal 12 according to a comparison result of pressure data detected by the sensor 130 after the gas transmission is cut off and a preset value. Therefore, the gas pipeline leakage monitoring device 10 can realize the gas pipeline leakage monitoring method, realize gas pipeline monitoring, and hopefully discover the problem of gas pipeline leakage as soon as possible, so as to intervene in advance. And the workload of leakage investigation of the gas pipeline can be greatly reduced.
Further, the plurality of pressure data may include a plurality of pressure data detected in one detection period.
Further, the plurality of pressure data are a plurality of pressure data detected in one detection period. The pressure data are all pressure values or pressure values after temperature correction.
In some embodiments of the present application, the sensor 130 is configured to detect a plurality of pressure values within the pipeline; the controller 120 is configured to compare the difference between the maximum value and the minimum value of the plurality of pressure values with a preset value. Further, the sensor 130 is a pressure sensor.
In some embodiments of the present application, the sensor 130 is configured to detect a plurality of pressure values and a plurality of temperature values in the pipeline, and the controller 120 is configured to calculate a plurality of temperature-corrected pressure values according to the plurality of pressure values and the plurality of temperature values, and compare a difference between a maximum value and a minimum value of the plurality of temperature-corrected pressure values with a preset value. Further, the sensor 130 includes a relative pressure sensor and a temperature sensor, or the sensor 130 includes an absolute pressure sensor and a temperature sensor, or the sensor 130 is a temperature and pressure integrated sensor.
Further, the controller 120 is configured to send a first control signal for opening the gas transmission in the pipeline and a second control signal for keeping cutting off the gas transmission in the pipeline to the valve 100 according to the comparison result;
when the comparison result is: a is 3 ＞P max -P min At this time, the controller 120 sends a first control signal to the valve 100;
when the comparison result is: a is 2 ＞P max -P min ＞a 3 Then, the second test is carried out, if the comparison result obtained by the second test is a 2 ＞P max -P min ＞a 3 After the second test is finished, the controller 120 sends a first control signal to the valve 100;
when the comparison result is: a is 1 ＞P max -P min ＞a 2 Meanwhile, a second test is performed, and after the second test is finished, the controller 120 sends a second control signal to the valve 100;
when the comparison result is: p max -P min ＞a 1 At this time, the controller 120 sends a second control signal to the valve 100;
wherein, P max For maximum pressure data, P, of the pressure data min Is the minimum pressure data of the pressure data, a 1 、a 2 And a 3 Is a preset value, a 1 ＞a 2 ＞a 3 。
In some embodiments of the present application, the gas pipeline leak monitoring apparatus 10 further includes a flow detection module. The flow detection module is arranged to detect the flow in the gas pipeline 13 between the pressure regulating tank 11 and the user end 12. When the flow detection module detects that the flow value in the gas pipeline 13 between the pressure regulating tank 11 and the user end 12 is lower than a preset flow value, the gas transmission of the gas pipeline 13 between the pressure regulating tank 11 and the user end 12 is cut off, after the gas transmission is cut off, a plurality of temperature-corrected pressure values are obtained by detecting the gas pipeline 13 in a preset time according to a plurality of pressure values and a plurality of temperature values, and the pressure values are compared with the preset value; and then controlling to keep cutting off the gas transmission in the pipeline or opening the gas transmission in the pipeline according to the comparison result of the plurality of pressure data and the preset value.
For example, the flow detection module may select a flow sensor or the like.
Further, the valve body 110 of the valve 100 has an inlet end 101 and an outlet end 102, the inlet end 101 is used for connecting the pressure regulating tank 11; the outgoing port 102 is used for connecting the user terminal 12.
Further, a sensor 130 is mounted at the outlet end 102 of the valve body 110.
Referring to fig. 2 and 3, in the illustrated embodiment, the inlet end 101 and the outlet end 102 of the valve body 110 are respectively provided with flanges 103. The whole gas pipeline leakage monitoring device 10 is connected to the gas pipeline 13 between the pressure regulating tank 11 and the user end 12 through the flange 103. Further, the sensor 130 is mounted on the flange 103 at the outlet end 102 of the valve body 110.
The controller 120 may be a PLC or the like.
The valve 100 may be selectively closed or opened by a motor. The motor is connected to a controller 120.
In some embodiments of the present application, the above-mentioned valve may also be a stop valve, a quick-closing mode, or a built-in integrated sensor.
Further, the gas pipeline leakage monitoring device 10 further includes: and an alarm device. The alarm device is used for giving an alarm when the gas transmission is kept cut off. Therefore, related personnel can be timely informed to carry out maintenance.
Illustratively, the alarm device may be a light alarm, an audible alarm, or the like.
In some embodiments of the present application, a gas pipeline leakage monitoring system is further provided, which includes the gas pipeline leakage monitoring device provided in the foregoing embodiments and a background server.
Further, the background server is in wireless communication with the controller and is used for receiving the data transmitted by the controller.
Further, the controller 120 wirelessly communicates with the background server through the remote communication module. The controller 120 has the capability of analyzing and judging data, and uploads the pressure data in time after the pressure data is collected, and the background server can also analyze and judge the data and has the functions of data statistics and classification and further analysis.
In some embodiments of the present application, the background server may directly issue an instruction to perform the valve closing detection. When the background server sends out an instruction for closing the valve, the fuel gas transmission of the fuel gas pipeline between the pressure regulating box and the user side is cut off; after the gas transmission is cut off, detecting a plurality of pressure data of the gas pipeline in a preset time, and comparing the pressure data with a preset value; and then controlling to keep cutting off the gas transmission in the pipeline or opening the gas transmission in the pipeline according to the comparison result of the plurality of pressure data and the preset value.
Further, the controller 120 performs remote transmission and monitoring with the backend server by using an NB-IOT transmission mode, the NB-IOT normal transmission mode is once a day, and the backend server can remotely increase the transmission frequency to an hourly transmission mode or set the transmission frequency by itself, or automatically adjust the transmission frequency according to pressure changes and the like, thereby implementing a quasi-online transmission mode.
Some embodiments of the present application provide a computer readable storage medium storing a computer program executable by a processor, the computer program, when executed by the processor, implementing the steps of the gas pipeline leakage monitoring method as provided in the previous embodiments.
By way of example, the computer readable storage medium may comprise: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. A gas pipeline leakage monitoring method is characterized by comprising the following steps:
cutting off the gas transmission of a gas pipeline between the pressure regulating box and the user side when the preset condition is met;
after the gas transmission is cut off, detecting a plurality of pressure data of the gas pipeline within a preset time, and comparing the pressure data with a preset value;
controlling to keep cutting off gas transmission in the pipeline or opening the gas transmission in the pipeline according to the comparison result of the plurality of pressure data and a preset value;
the preset time is a detection period, the pressure data is a pressure value after temperature correction, a plurality of pressure data of the gas pipeline in the preset time are detected, and the pressure data are compared with a preset value, and the method comprises the following steps:
detecting a plurality of pressure values and temperature values of the gas pipeline in a detection period, correcting the pressure values by using the temperature values, and calculating a difference value between a corrected maximum pressure value and a corrected minimum pressure value; comparing the difference value with the preset value;
according to the comparison result, the step of controlling to keep cutting off or opening the gas transmission in the pipeline comprises the following steps:
when the comparison result is: a is a 3 ＞P max -P min When the gas is in use, the gas transmission is started;
when the comparison result is that：a 2 ＞P max -P min ＞a 3 Then, the second test is carried out, if the comparison result obtained by the second test is a 2 ＞P max -P min ＞a 3 After the second test is finished, the gas transmission is started;
when the comparison result is: a is a 1 ＞P max -P min ＞a 2 When the test is finished, the second test is carried out, and the gas transmission is kept cut off after the second test is finished;
when the comparison result is: p max -P min ＞a 1 When the gas is not transmitted, the gas transmission is kept cut off;
wherein, P max Is the maximum pressure value, P min Is the minimum pressure value, a 1 、a 2 And a 3 Is the preset value, a 1 ＞a 2 ＞a 3 。
2. The gas pipeline leakage monitoring method according to claim 1,
the preset condition comprises a preset time period;
or the preset condition comprises that the flow value in the gas pipeline between the pressure regulating tank and the user side is lower than a preset flow value;
or, the preset conditions include: and the background server sends out a valve closing instruction.
3. The gas pipeline leakage monitoring method according to claim 1,
the step of correcting the plurality of pressure values by using the temperature values comprises correcting according to the following formula:
P correction ＝PT 0 /T n
In the formula, T 0 The temperature is the temperature collected for the first time; t is n The temperature collected for the nth time; p is the pressure value at the point of collection of the pipeline.
4. The gas pipeline leakage monitoring method of claim 1,
when the gas transmission is kept cut off, an alarm is given.
5. A gas pipeline leakage monitoring device is applied to the gas pipeline leakage monitoring method of any one of claims 1 to 4, and the device comprises:
the valve is used for being arranged on a gas pipeline between the pressure regulating box and the user side;
a sensor for detecting gas pressure data within the gas pipeline;
the controller is used for controlling the valve to cut off the gas transmission of the gas pipeline between the pressure regulating box and the user side when preset conditions are met; the gas pipeline control system is used for controlling the opening or closing of the valve arranged on the gas pipeline between the pressure regulating box and the user side according to the comparison result of the pressure data detected by the sensor after the gas transmission is cut off and a preset value;
the pressure data are pressure values after temperature correction;
the sensor is used for detecting a plurality of pressure values and a plurality of temperature values in the pipeline, the controller is used for calculating a plurality of temperature corrected pressure values according to the plurality of pressure values and the plurality of temperature values, and comparing a difference value between a maximum value and a minimum value in the plurality of temperature corrected pressure values with a preset value; the sensor comprises a relative pressure sensor and a temperature sensor, or the sensor comprises an absolute pressure sensor and a temperature sensor, or the sensor is a temperature and pressure integrated sensor;
the controller is used for sending a first control signal for opening the gas transmission in the pipeline and a second control signal for keeping cutting off the gas transmission in the pipeline to the valve according to the comparison result;
when the comparison result is: a is a 3 ＞P max -P min When the valve is closed, the controller sends a first control signal to the valve;
when the comparison result is: a is 2 ＞P max -P min ＞a 3 Then, the second test is carried out, if the comparison result obtained by the second test is a 2 ＞P max -P min ＞a 3 After the second test is finished, the controller sends a first control signal to the valve;
when the comparison result is: a is 1 ＞P max -P min ＞a 2 When the second test is finished, the controller sends a second control signal to the valve;
when the comparison result is: p max -P min ＞a 1 When the valve is closed, the controller sends a second control signal to the valve;
wherein, P max Is the maximum pressure data, P, of the pressure data min Is the minimum pressure data among the pressure data, a 1 、a 2 And a 3 For the preset value, a 1 ＞a 2 ＞a 3 。
6. The gas pipeline leakage monitoring device of claim 5, wherein the valve body of the valve has an inlet end and an outlet end, the inlet end being used for connecting the pressure regulating tank; the air outlet end is used for being connected with the user end;
the sensor is arranged at the air outlet end of the valve body; and/or
Gas pipeline leakage monitoring equipment still includes: and the alarm device is used for giving an alarm when the gas transmission is kept cut off.
7. The gas pipeline leakage monitoring apparatus of claim 5, further comprising: a flow detection module;
the flow detection module is used for detecting the flow in a gas pipeline between the pressure regulating box and the user side.
8. A gas pipeline leakage monitoring system comprising a gas pipeline leakage monitoring device according to any one of claims 5 to 7; and
and the background server is in wireless communication with the controller and is used for receiving the data transmitted by the controller.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program executable by a processor, the computer program, when executed by the processor, implementing the steps of the gas pipeline leakage monitoring method according to any one of claims 1-4.
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| CN112233370B (en) * | 2020-09-28 | 2022-08-30 | 广州广燃设计有限公司 | Gas leakage alarm method, device and equipment |
| CN112903211A (en) * | 2021-03-29 | 2021-06-04 | 广州燃气集团有限公司 | Equipment and method for detecting tightness of gas pipeline |
| CN113075899B (en) * | 2021-04-07 | 2023-06-20 | 广州燃气集团有限公司 | Gas leakage monitoring method based on intelligent gas meter of Internet of things |
| CN113654899B (en) * | 2021-07-30 | 2023-12-22 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Pressure analysis method, device, equipment and storage medium for conveying pipeline |
| CN113864658B (en) * | 2021-09-01 | 2023-11-03 | 常州维格电子有限公司 | System and method for detecting leakage fault of gas pipeline |
| CN117451281B (en) * | 2023-11-15 | 2024-04-02 | 佛山市帆泰电器配件有限公司 | Tightness test method and system for air conditioner connecting pipe |
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