Pipe network monitoring control system

Abstract

The utility model discloses a pipe network monitoring control system, which relates to the technical field of pipeline monitoring, and comprises a pressure sensor circuit, a main control circuit, a communication module, a position positioning module and an alarm module, and the detection end of the main control circuit is electrically connected with the output end of the pressure sensor circuit. The main control circuit is used for comparing the pressure detection signal with a preset upper limit threshold value and a preset lower limit threshold value, the main control circuit is electrically connected with the communication module, the communication module is used for establishing communication connection with an external terminal, the position positioning module is electrically connected with the main control circuit, and the alarm module is electrically connected with the main control circuit. When the pressure detection signal is larger than a preset upper threshold value or smaller than a preset lower threshold value, the main control circuit controls the position positioning module and the alarm module to work. When the natural gas pipeline is long, if a certain section of the natural gas pipeline is abnormal, a user can be reminded of one or more abnormal sections of the pipeline in time.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline monitoring, in particular to a pipeline network monitoring and control system. Background Art

[0002] Pipeline transportation is an economical and important form of transmission. However, due to climate and environmental factors or other human factors, the safe and stable operation of the pipeline is affected, resulting in leakage accidents in natural gas transmission pipelines from time to time, which in turn causes fire accidents. Therefore, the safety protection and leakage monitoring of natural gas transmission pipelines have become issues that cannot be ignored.

[0003] In order to monitor pipeline leakage, the existing technology generally installs a monitoring device at a certain point in the pipeline, but this method is only suitable for use in shorter pipelines. When the pipeline is long, if a certain section of the pipeline may have a local blockage caused by foreign matter, sediment or hydrate, etc., gas will accumulate in this section of the pipeline and the pressure will increase. At the same time, local leakage of the pipeline may also cause the pressure in this section of the pipeline to rise, because the gas flow around the leakage point is hindered and the pressure increases; if the gas source supply upstream of this section of the pipeline is insufficient, or there are problems such as blockage and leakage in the upstream pipeline, the gas flow in this section of the pipeline may decrease and the pressure may decrease. Because the pipeline is long, the existing monitoring device cannot promptly detect which section of the pipeline has a problem. Utility Model Content

[0004] The main purpose of the utility model is to provide a pipeline network monitoring and control system, which aims to realize that when a natural gas pipeline is long, if an abnormality occurs in a certain section of the natural gas pipeline, the user can be promptly notified of the abnormal section or sections of the pipeline.

[0005] To achieve the above purpose, the utility model proposes a pipeline network monitoring and control system, which is applied to a natural gas pipeline. The pipeline network monitoring and control system includes a plurality of pipeline monitoring devices, and the pipeline monitoring devices include:

[0006] A pressure sensor circuit, wherein the pressure sensor circuit is used to detect the gas pressure in the natural gas pipeline and output a corresponding pressure detection signal;

[0007] A main control circuit, wherein a detection end of the main control circuit is electrically connected to an output end of the pressure sensor circuit, and the main control circuit is used to compare the pressure detection signal with a preset upper threshold value and a preset lower threshold value respectively;

[0008] A communication module, the main control circuit is electrically connected to the communication module, and the communication module is used to establish a communication connection with an external terminal;

[0009] A position positioning module, the position positioning module is electrically connected to the main control circuit, and when the pressure detection signal is greater than a preset upper threshold or less than a preset lower threshold, the main control circuit controls the position positioning module to work so that the position positioning module outputs a corresponding position signal to an external terminal;

[0010] An alarm module is electrically connected to the main control circuit. When the pressure detection signal is greater than a preset upper threshold or less than a preset lower threshold, the main control circuit controls the alarm module to operate.

[0011] In one embodiment, the main control circuit includes:

[0012] a first comparator circuit, wherein the in-phase end of the first comparator circuit is electrically connected to the output end of the pressure sensor circuit, the inverting end of the first comparator circuit is connected to the upper limit threshold signal, the output end of the first comparator circuit is electrically connected to the communication module, the position positioning module and the alarm module respectively, and when the pressure detection signal is greater than the upper limit threshold signal, the first comparator circuit controls the position positioning module and the alarm module to work respectively;

[0013] A second comparator circuit, wherein the inverting end of the second comparator circuit is electrically connected to the output end of the pressure sensor circuit, the non-inverting end of the second comparator circuit is connected to the lower threshold signal, the output end of the second comparator circuit is electrically connected to the communication module, the position positioning module and the alarm module respectively, and when the pressure detection signal is less than the lower threshold signal, the second comparator circuit controls the position positioning module and the alarm module to work respectively.

[0014] In one embodiment, the first comparator circuit comprises:

[0015] A first comparator, a first voltage follower and a first filter circuit, wherein the input end of the first voltage follower is electrically connected to the output end of the pressure sensor circuit, the output end of the first voltage follower is electrically connected to the input end of the first filter circuit, the output end of the first filter circuit is electrically connected to the in-phase end of the first comparator, the inverting end of the first comparator is connected to the upper limit threshold signal, and the output end of the first comparator is electrically connected to the communication module, the position positioning module and the alarm module;

[0016] The second comparator circuit comprises:

[0017] A second comparator, a second voltage follower and a second filtering circuit, wherein the input end of the second voltage follower is electrically connected to the output end of the pressure sensor circuit, the output end of the second voltage follower is electrically connected to the input end of the second filtering circuit, the output end of the second filtering circuit is electrically connected to the inverting end of the second comparator, the non-inverting end of the second comparator is connected to the lower limit threshold signal, and the output end of the second comparator is electrically connected to the communication module, the position positioning module and the alarm module.

[0018] In one embodiment, the main control circuit includes:

[0019] An analog-to-digital converter and a main controller, wherein the input end of the analog-to-digital converter is electrically connected to the output end of the pressure sensor circuit, the output end of the analog-to-digital converter is electrically connected to the detection end of the main controller, and the analog-to-digital converter is used to perform analog-to-digital conversion on the pressure detection signal and output corresponding pressure detection data;

[0020] The main controller is electrically connected to the position positioning module and the alarm module respectively.

[0021] In one embodiment, the pipeline monitoring device further comprises:

[0022] A display module is electrically connected to the main controller, and is used to receive corresponding pressure detection data through the main controller and display the corresponding pressure detection data.

[0023] In one embodiment, the pressure sensor circuit comprises:

[0024] A pressure sensor, a third filter circuit and an amplifier circuit, wherein the pressure sensor is used to detect the gas pressure of the natural gas pipeline and output a corresponding pressure detection signal, the output end of the pressure sensor is electrically connected to the input end of the third filter circuit, the output end of the third filter circuit is electrically connected to the input end of the amplifier circuit, and the output end of the amplifier circuit is electrically connected to the detection end of the main control circuit.

[0025] In one embodiment, the pipeline monitoring device further comprises:

[0026] A temperature and humidity detection module, the output end of which is electrically connected to the detection end of the main control circuit, and the temperature and humidity detection module is used to detect the temperature and humidity in the natural gas pipeline and output a corresponding temperature and humidity detection signal;

[0027] The main control circuit controls the position positioning module and the alarm module to turn on / off respectively according to the size of the temperature and humidity detection signal.

[0028] In one embodiment, the pipe network monitoring and control system further comprises:

[0029] A natural gas concentration detection module and an exhaust device, wherein the natural gas concentration detection module is used to detect the natural gas concentration in the ambient air and output a corresponding concentration detection signal, wherein the output end of the natural gas concentration detection module is electrically connected to the detection end of the main control circuit, and the controlled end of the exhaust device is electrically connected to the main control circuit;

[0030] When the concentration detection signal is greater than a preset concentration value, the main control circuit controls the exhaust device, the position positioning module and the alarm module to operate respectively.

[0031] The technical solution of the utility model adopts a pressure sensor circuit to detect the air pressure in the natural gas pipeline, and outputs a corresponding pressure detection signal to the main control circuit, so that the main control circuit can judge the size of the air pressure value. When the air pressure is greater than a preset upper limit threshold or lower than a preset lower limit threshold, the main control circuit controls the position positioning module and the alarm module to work, and the communication module is used to transmit the pressure detection signal received by the main control module to an external terminal, such as a host computer or a mobile phone terminal. With such a setting, in actual applications, when the natural gas pipeline is long, multiple pipeline monitoring devices can be respectively arranged in each section of the natural gas pipeline. When the air pressure in one or more sections is abnormal, the corresponding pipeline monitoring device sends the corresponding pipeline position signal to the external terminal through the position positioning module. The corresponding pipeline monitoring equipment will also issue alarm actions such as sound alarm, light alarm or vibration alarm, so that users can promptly find the specific location of one or more sections of the natural gas pipeline where the abnormality occurs; or the utility model pipeline can be applied to multiple different natural gas pipelines. When the air pressure of one or more pipelines is abnormal, the user can promptly find the specific location of the abnormal pipeline, and the user can establish a communication connection with the pipeline monitoring equipment through a host computer or a mobile phone, so as to obtain the air pressure value of the natural gas pipeline in real time, so that the user can remotely monitor the air pressure of the natural gas pipeline in real time. When the air pressure is abnormal, the main control circuit can also transmit the corresponding alarm signal to the external terminal through the communication module to promptly remind the user that the natural gas pipeline is abnormal. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 This is a schematic diagram of a module of an embodiment of the utility model;

[0034] Figure 2 This is a schematic diagram of the circuit structure of an embodiment of the utility model;

[0035] Figure 3 This is a schematic diagram of a module of another embodiment of the utility model;

[0036] Figure 4 This is a module schematic diagram of another embodiment of the utility model;

[0037] Figure 5 This is a module schematic diagram of yet another embodiment of the present utility model.

[0038] Description of Figure Numbers:

[0039] 10. Pressure sensor circuit; 11. Pressure sensor; 12. Third filter circuit; 13. Amplifier circuit; 20. Main control circuit; 21. First comparator circuit; 22. Second comparator circuit; 23. Analog-to-digital converter; 24. Main controller; 30. Communication module; 40. Positioning module; 50. Alarm module; 60. Display module; 70. Natural gas concentration detection module; 80. Exhaust device.

[0040] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0044] Pipeline transportation is an economical and important form of transmission. However, due to climate and environmental factors or other human factors, the safe and stable operation of the pipeline is affected, resulting in leakage accidents in natural gas transmission pipelines from time to time, which in turn causes fire accidents. Therefore, the safety protection and leakage monitoring of natural gas transmission pipelines have become issues that cannot be ignored.

[0045] In order to monitor pipeline leakage, the existing technology generally installs a monitoring device at a certain point in the pipeline, but this method is only suitable for use in shorter pipelines. When the pipeline is long, if a certain section of the pipeline may have a local blockage caused by foreign matter, sediment or hydrate, etc., gas will accumulate in this section of the pipeline and the pressure will increase. At the same time, local leakage of the pipeline may also cause the pressure in this section of the pipeline to rise, because the gas flow around the leakage point is hindered and the pressure increases; if the gas source supply upstream of this section of the pipeline is insufficient, or there are problems such as blockage and leakage in the upstream pipeline, the gas flow in this section of the pipeline may decrease and the pressure may decrease. Because the pipeline is long, the existing monitoring device cannot promptly detect which section of the pipeline has a problem.

[0046] To this end, the utility model proposes a pipeline network monitoring and control system, which aims to realize that when a natural gas pipeline is long, if an abnormality occurs in a certain section of the natural gas pipeline, the user can be promptly notified of the abnormal section or sections of the pipeline.

[0047] refer to Figure 1 In one embodiment of the present utility model, a pipeline network monitoring and control system is applied to a natural gas pipeline. The pipeline network monitoring and control system includes a plurality of pipeline monitoring devices, and the pipeline monitoring devices include:

[0048] A pressure sensor circuit 10, wherein the pressure sensor circuit 10 is used to detect the gas pressure in the natural gas pipeline and output a corresponding pressure detection signal;

[0049] A main control circuit 20, wherein the detection end of the main control circuit 20 is electrically connected to the output end of the pressure sensor circuit 10, and the main control circuit 20 is used to compare the pressure detection signal with a preset upper threshold value and a preset lower threshold value respectively;

[0050] A communication module 30, the main control circuit 20 is electrically connected to the communication module 30, and the communication module 30 is used to establish a communication connection with an external terminal;

[0051] A position positioning module 40, wherein the position positioning module 40 is electrically connected to the main control circuit 20, and when the pressure detection signal is greater than a preset upper threshold or less than a preset lower threshold, the main control circuit 20 controls the position positioning module 40 to work so that the position positioning module 40 outputs a corresponding position signal to an external terminal;

[0052] The alarm module 50 is electrically connected to the main control circuit 20. When the pressure detection signal is greater than a preset upper threshold or less than a preset lower threshold, the main control circuit 20 controls the alarm module 50 to operate.

[0053] In this embodiment, the main control circuit 20 can be implemented by a main controller, such as an MCU (Microcontroller Unit), a DSP (Digital Signal Process), an FPGA (Field Programmable Gate Array), a SOC (System On Chip), etc.; the main control circuit can process the pressure detection signal to obtain corresponding pressure data.

[0054] In this embodiment, optionally, the communication module 30 includes a wired communication module 30, wherein the wired communication module 30 may use a wired communication chip, such as a CAN communication chip, an SPI communication chip, an I2C communication chip, a LIN communication chip, etc. The wired communication chip may establish a communication connection with an external terminal via a communication line. For example, in a natural gas pipeline network monitoring and control system, the communication module 30 in the pipeline monitoring device uses a wired communication module 30 and is connected to a control terminal in the natural gas pipeline network monitoring and control system via a communication line. The user may receive pressure data transmitted from the wired communication module 30 through a control terminal such as a host computer, so that the user can monitor the gas pressure of the natural gas pipeline in real time.

[0055] Optionally, the communication module 30 includes a wireless communication module 30. The wireless communication module 30 may use a wireless communication chip, such as a 4G / 5G communication chip, a WIFI communication chip, a Bluetooth communication chip, a local area network communication chip, etc. The wireless communication chip may establish a communication connection with an external terminal via an antenna and a wireless communication network. For example, the external terminal is a handheld terminal of a user, and the wireless communication chip establishes a wireless communication connection with the handheld terminal of the user via a 4G / 5G network. The user may operate the corresponding APP on the handheld terminal so that the handheld terminal receives the pressure data transmitted from the wireless communication module 30 via the 4G / 5G network. For the user, the gas pressure of the natural gas pipeline can be remotely monitored.

[0056] In this embodiment, optionally, the position positioning module may adopt one of a GPS positioning module, a Beidou module, and a GLONASS module.

[0057] In the present embodiment, specifically, the technical solution of the present utility model detects the air pressure in the natural gas pipeline by using the pressure sensor circuit 10, and outputs the corresponding pressure detection signal to the main control circuit 20, so that the main control circuit 20 judges the size of the air pressure value. When the air pressure is greater than the preset upper limit threshold or lower than the preset lower limit threshold, the main control circuit 20 controls the position positioning module 40 and the alarm module 50 to work, and the communication module 30 is used to transmit the pressure detection signal received by the main control module to an external terminal, such as a host computer or a mobile phone terminal, etc. With such a setting, in actual applications, when the natural gas pipeline is long, multiple pipeline monitoring devices can be respectively set in each section of the natural gas pipeline. When the air pressure in one or more sections is abnormal, the corresponding pipeline monitoring device sends an external terminal through the position positioning module 40. The terminal sends the location information of the corresponding pipeline, and the corresponding pipeline monitoring equipment will also send out alarm actions such as sound alarm, light alarm or vibration alarm, so that the user can promptly find the specific location of one or more sections of the natural gas pipeline where the abnormality occurs; or the utility model pipeline can be applied to multiple different natural gas pipelines. When the air pressure of one or more pipelines is abnormal, the user can promptly find the specific location of the abnormal pipeline, and the user can establish a communication connection with the pipeline monitoring equipment through a host computer or a mobile phone, so as to obtain the air pressure value of the natural gas pipeline in real time, so that the user can remotely monitor the air pressure of the natural gas pipeline in real time. When the air pressure is abnormal, the main control circuit 20 can also transmit a corresponding alarm signal to the external terminal through the communication module 30 to promptly remind the user that the natural gas pipeline is abnormal.

[0058] refer to Figure 2 In one embodiment of the present utility model, the main control circuit 20 includes:

[0059] A first comparator circuit 21, wherein the in-phase end of the first comparator circuit 21 is electrically connected to the output end of the pressure sensor circuit 10, the inverting end of the first comparator circuit 21 is connected to the upper threshold signal, and the output end of the first comparator circuit 21 is electrically connected to the communication module 30, the position positioning module 40 and the alarm module 50 respectively. When the pressure detection signal is greater than the upper threshold signal, the first comparator circuit 21 controls the position positioning module 40 and the alarm module 50 to work respectively;

[0060] A second comparator circuit 22, the inverting end of the second comparator circuit 22 is electrically connected to the output end of the pressure sensor circuit 10, the non-inverting end of the second comparator circuit 22 is connected to the lower limit threshold signal, the output end of the second comparator circuit 22 is electrically connected to the communication module 30, the position positioning module 40 and the alarm module 50 respectively, when the pressure detection signal is less than the lower limit threshold signal, the second comparator circuit 22 controls the position positioning module 40 and the alarm module 50 to work respectively.

[0061] In this embodiment, the first comparator circuit 21 and the second comparator circuit 22 are composed of at least one comparator. The first comparator circuit 21 is used to compare the voltage of the pressure detection signal with the voltage of the upper threshold signal. If the pressure detection signal is greater than the upper threshold signal, it means that the gas pressure in a certain section of the natural gas pipeline is too high. The first comparator circuit 21 outputs a corresponding control signal (high level) to control the position positioning module 40 and the alarm module 50 to work; the second comparator circuit 22 is used to compare the voltage of the pressure detection signal with the voltage of the lower threshold signal. If the pressure detection signal is less than the lower preset threshold, it means that the gas pressure in a certain section of the natural gas pipeline is insufficient. The second comparator circuit 22 outputs a corresponding control signal (high level) to control the position positioning module 40 and the alarm module 50 to work; the high level signal output by the first comparator circuit 21 or the second comparator circuit 22 is transmitted to the external terminal through the communication module 30. The external terminal can be set to issue an alarm when receiving the high level signal, so as to promptly remind the user that the gas pressure of the natural gas pipeline is abnormal. With such a configuration, the main control circuit 20 only needs to use a comparator to compare the gas pressure of the natural gas pipeline, without the need to use a control chip such as an MCU, thereby effectively reducing the material cost of the pipeline monitoring equipment and eliminating the need for software code writing, thereby accelerating the research and development progress.

[0062] In this embodiment, the first comparator circuit 21 includes:

[0063] A first comparator U2, a first voltage follower U1 and a first filter circuit 12, wherein the input end of the first voltage follower U1 is electrically connected to the output end of the pressure sensor circuit 10, the output end of the first voltage follower U1 is electrically connected to the input end of the first filter circuit 12, the output end of the first filter circuit 12 is electrically connected to the in-phase end of the first comparator U2, the inverting end of the first comparator U2 is connected to the upper limit threshold signal, and the output end of the first comparator U2 is electrically connected to the communication module 30, the position positioning module 40 and the alarm module 50;

[0064] The second comparator circuit 22 comprises:

[0065] A second comparator U4, a second voltage follower U3 and a second filter circuit 12, wherein the input end of the second voltage follower U3 is electrically connected to the output end of the pressure sensor circuit 10, the output end of the second voltage follower U3 is electrically connected to the input end of the second filter circuit 12, the output end of the second filter circuit 12 is electrically connected to the inverting end of the second comparator U4, the non-inverting end of the second comparator U4 is connected to the lower limit threshold signal, and the output end of the second comparator U4 is electrically connected to the communication module 30, the position positioning module 40 and the alarm module 50.

[0066] In this embodiment, the first filter circuit 12 includes a first resistor R1 and a first capacitor C1, the second filter circuit 12 includes a second resistor R2 and a second capacitor C2, and the voltage follower is used to buffer and isolate the pressure detection signal output by the pressure sensor circuit 10 to ensure the stability and accuracy of the signal. The filter circuit 12 filters the signal output by the voltage sensor to remove noise and unnecessary frequency components, thereby obtaining a smoother and more stable signal. In this way, the stability and smoothness of the pressure detection signal can prevent the noise in the signal from interfering with the first comparator U2 or the second comparator U4.

[0067] refer to Figure 4 In one embodiment of the present utility model, the main control circuit 20 includes:

[0068] An analog-to-digital converter 23 and a main controller 24, wherein the input end of the analog-to-digital converter 23 is electrically connected to the output end of the pressure sensor circuit 10, and the output end of the analog-to-digital converter 23 is electrically connected to the detection end of the main controller 24, and the analog-to-digital converter 23 is used to perform analog-to-digital conversion on the pressure detection signal and output corresponding pressure detection data;

[0069] The main controller 24 is electrically connected to the position positioning module 40 and the alarm module 50 respectively.

[0070] In this embodiment, the analog-to-digital converter 23 is used to convert the pressure detection signal into corresponding pressure detection data. The main controller 24 can obtain the corresponding pressure value according to the pressure detection data, and compare the pressure value with the preset upper limit threshold and the preset lower limit threshold respectively. When the pressure value is greater than the preset upper limit threshold or lower than the preset lower limit threshold, the main controller 24 outputs the corresponding control signal to control the position positioning module 40 and the alarm module 50 to work, and the main controller 24 can transmit the corresponding pressure value to the external terminal through the communication module 30. With this arrangement, the user can obtain the gas pressure data of the natural gas pipeline in real time through the pipeline monitoring equipment, thereby remotely monitoring the gas pressure data of the natural gas pipeline in real time.

[0071] In this embodiment, the pipeline monitoring device further includes:

[0072] The display module 60 is electrically connected to the main controller 24 , and is used for receiving corresponding pressure detection data through the main controller 24 and displaying the corresponding pressure detection data.

[0073] In this embodiment, the display module 60 receives the corresponding pressure detection data through the main controller 24 and displays the pressure detection data. With this arrangement, when multiple pipeline monitoring devices are applied to the same natural gas pipeline, the user can understand the air pressure data of one or more sections of the natural gas pipeline in real time by observing the display module 60 on the pipeline monitoring device. When an abnormality occurs in the pipeline, the user can formulate a more reasonable maintenance plan based on the pressure data displayed on the display module 60 to avoid unnecessary maintenance and replacement, thereby reducing maintenance costs.

[0074] refer to Figure 3 In one embodiment of the present utility model, the pressure sensor circuit 10 includes:

[0075] A pressure sensor 11, a third filter circuit 12 and an amplifier circuit 13, wherein the pressure sensor 11 is used to detect the gas pressure of the natural gas pipeline and output a corresponding pressure detection signal, the output end of the pressure sensor 11 is electrically connected to the input end of the third filter circuit 12, the output end of the third filter circuit 12 is electrically connected to the input end of the amplifier circuit 13, and the output end of the amplifier circuit 13 is electrically connected to the detection end of the main control circuit 20.

[0076] In this embodiment, the pressure sensor 11 can detect the gas pressure of the natural gas pipeline and output a corresponding pressure detection signal. The main function of the third filter circuit 12 is to remove noise and interference in the pressure detection signal to ensure that the signal received by the subsequent amplifier circuit 13 and the main control circuit 20 is clear and accurate. The amplifier circuit 13 amplifies the filtered signal so that the main control circuit 20 can more easily detect the voltage change.

[0077] In one embodiment of the present invention, the pipeline monitoring device further includes:

[0078] A temperature and humidity detection module, the output end of which is electrically connected to the detection end of the main control circuit 20, and the temperature and humidity detection module is used to detect the temperature and humidity in the natural gas pipeline and output a corresponding temperature and humidity detection signal;

[0079] The main control circuit 20 controls the position positioning module 40 and the alarm module 50 to turn on / off respectively according to the magnitude of the temperature and humidity detection signal.

[0080] In this embodiment, excessive humidity in the natural gas pipeline may cause corrosion of the inner wall of the pipeline, thereby affecting the safety and service life of the pipeline. When the humidity in the pipeline exceeds the preset humidity value, the main control circuit 20 controls the position positioning module 40 and the alarm module 50 to work, thereby prompting the user that the humidity of the corresponding pipeline is abnormal, or that a corresponding section of the pipeline is abnormal; excessive temperature may cause a large change in the stress of the pipeline material, thereby accelerating the corrosion process. When the temperature exceeds the preset temperature value, the main control circuit 20 controls the position positioning module 40 and the alarm module 50 to work, thereby prompting the user that the temperature of the corresponding pipeline is abnormal, or that a corresponding section of the pipeline is abnormal.

[0081] In one embodiment of the present invention, the pipe network monitoring and control system comprises:

[0082] Multiple inflation valves and multiple deflation valves, the multiple inflation valves are arranged one-to-one at multiple inflation ports of the natural gas pipeline, and the multiple deflation valves are arranged one-to-one at multiple deflation ports of the natural gas pipeline. The controlled ends of the multiple inflation valves and the controlled ends of the multiple deflation valves are electrically connected to the main control circuit 20 of the multiple pipeline monitoring devices; when the pressure detection signal output by the pressure sensor circuit 10 of any one or more of the pipeline monitoring devices is greater than the preset upper limit threshold, the main control circuit 20 controls the corresponding inflation valve to close, and controls the corresponding deflation valve to open.

[0083] In this embodiment, multiple pipeline monitoring devices are respectively applied to multiple sections of the natural gas pipeline. When the air pressure in one or more sections of the natural gas pipeline is too high, the main control circuit 20 controls the corresponding inflation valve to close to prevent the already excessive air pressure from continuing to increase, and controls the corresponding deflation valve to open, so as to reduce the air pressure value of the abnormal section or sections of the pipeline. With such a setting, in actual application, the utility model pipeline network monitoring and control system can independently control the abnormal section or sections of the pipeline, close its inflation valve and open the deflation valve without affecting the operation of other normal sections, thereby realizing fault isolation.

[0084] refer to Figure 5 In one embodiment of the present utility model, the pipe network monitoring and control system further includes:

[0085] A natural gas concentration detection module 70 and an exhaust device 80, wherein the natural gas concentration detection module 70 is used to detect the natural gas concentration in the ambient air and output a corresponding concentration detection signal, wherein the output end of the natural gas concentration detection module 70 is electrically connected to the detection end of the main control circuit 20, and the controlled end of the exhaust device 80 is electrically connected to the main control circuit 20;

[0086] When the concentration detection signal is greater than a preset concentration value, the main control circuit 20 controls the exhaust device 80, the position positioning module 40 and the alarm module 50 to operate respectively.

[0087] In this embodiment, if the gas pressure of the natural gas pipeline is too high, the pipeline may rupture, causing natural gas leakage. The natural gas concentration detection module 70 is used to detect the concentration of natural gas in the environment. When the natural gas concentration is too high, the main control circuit 20 controls the position positioning module 40 and the alarm module 50 to work, so as to prompt the user of the specific location of the natural gas leakage, greatly shortening the emergency response time and improving the efficiency of accident handling. When the natural gas concentration is too high, the main control circuit 20 also controls the exhaust device 80 to work, so as to discharge the natural gas in the room, which helps to reduce the natural gas concentration in the room and reduce the harm that may be caused by the leakage accident.

[0088] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pipeline network monitoring and control system, applied to natural gas pipelines, characterized in that: The pipeline network monitoring and control system includes a plurality of pipeline monitoring devices, and the pipeline monitoring devices include: A pressure sensor circuit, wherein the pressure sensor circuit is used to detect the gas pressure in the natural gas pipeline and output a corresponding pressure detection signal; A main control circuit, wherein a detection end of the main control circuit is electrically connected to an output end of the pressure sensor circuit, and the main control circuit is used to compare the pressure detection signal with a preset upper threshold value and a preset lower threshold value respectively; A communication module, the main control circuit is electrically connected to the communication module, and the communication module is used to establish a communication connection with an external terminal; A position positioning module, the position positioning module is electrically connected to the main control circuit, and when the pressure detection signal is greater than a preset upper threshold or less than a preset lower threshold, the main control circuit controls the position positioning module to work so that the position positioning module outputs a corresponding position signal to an external terminal; An alarm module is electrically connected to the main control circuit. When the pressure detection signal is greater than a preset upper threshold or less than a preset lower threshold, the main control circuit controls the alarm module to operate.

2. The pipe network monitoring and control system according to claim 1, characterized in that: The main control circuit comprises: a first comparator circuit, wherein the in-phase end of the first comparator circuit is electrically connected to the output end of the pressure sensor circuit, the inverting end of the first comparator circuit is connected to the upper limit threshold signal, the output end of the first comparator circuit is electrically connected to the communication module, the position positioning module and the alarm module respectively, and when the pressure detection signal is greater than the upper limit threshold signal, the first comparator circuit controls the position positioning module and the alarm module to work respectively; A second comparator circuit, wherein the inverting end of the second comparator circuit is electrically connected to the output end of the pressure sensor circuit, the non-inverting end of the second comparator circuit is connected to the lower threshold signal, the output end of the second comparator circuit is electrically connected to the communication module, the position positioning module and the alarm module respectively, and when the pressure detection signal is less than the lower threshold signal, the second comparator circuit controls the position positioning module and the alarm module to work respectively.

3. The pipe network monitoring and control system according to claim 2, characterized in that: The first comparator circuit comprises: A first comparator, a first voltage follower and a first filter circuit, wherein the input end of the first voltage follower is electrically connected to the output end of the pressure sensor circuit, the output end of the first voltage follower is electrically connected to the input end of the first filter circuit, the output end of the first filter circuit is electrically connected to the in-phase end of the first comparator, the inverting end of the first comparator is connected to the upper limit threshold signal, and the output end of the first comparator is electrically connected to the communication module, the position positioning module and the alarm module; The second comparator circuit comprises: A second comparator, a second voltage follower and a second filtering circuit, wherein the input end of the second voltage follower is electrically connected to the output end of the pressure sensor circuit, the output end of the second voltage follower is electrically connected to the input end of the second filtering circuit, the output end of the second filtering circuit is electrically connected to the inverting end of the second comparator, the non-inverting end of the second comparator is connected to the lower limit threshold signal, and the output end of the second comparator is electrically connected to the communication module, the position positioning module and the alarm module.

4. The pipe network monitoring and control system according to claim 1, characterized in that: The main control circuit comprises: An analog-to-digital converter and a main controller, wherein the input end of the analog-to-digital converter is electrically connected to the output end of the pressure sensor circuit, the output end of the analog-to-digital converter is electrically connected to the detection end of the main controller, and the analog-to-digital converter is used to perform analog-to-digital conversion on the pressure detection signal and output corresponding pressure detection data; The main controller is electrically connected to the position positioning module and the alarm module respectively.

5. The pipe network monitoring and control system according to claim 4, characterized in that: The pipeline monitoring device also includes: A display module is electrically connected to the main controller, and is used to receive corresponding pressure detection data through the main controller and display the corresponding pressure detection data.

6. The pipe network monitoring and control system according to claim 1, characterized in that: The pressure sensor circuit comprises: A pressure sensor, a third filter circuit and an amplifier circuit, wherein the pressure sensor is used to detect the gas pressure of the natural gas pipeline and output a corresponding pressure detection signal, the output end of the pressure sensor is electrically connected to the input end of the third filter circuit, the output end of the third filter circuit is electrically connected to the input end of the amplifier circuit, and the output end of the amplifier circuit is electrically connected to the detection end of the main control circuit.

7. The pipe network monitoring and control system according to claim 1, characterized in that: The pipeline monitoring device also includes: A temperature and humidity detection module, the output end of which is electrically connected to the detection end of the main control circuit, and the temperature and humidity detection module is used to detect the temperature and humidity in the natural gas pipeline and output a corresponding temperature and humidity detection signal; The main control circuit controls the position positioning module and the alarm module to turn on / off respectively according to the size of the temperature and humidity detection signal.

8. The pipe network monitoring and control system according to claim 1, characterized in that: The pipe network monitoring and control system also includes: A natural gas concentration detection module and an exhaust device, wherein the natural gas concentration detection module is used to detect the natural gas concentration in the ambient air and output a corresponding concentration detection signal, wherein the output end of the natural gas concentration detection module is electrically connected to the detection end of the main control circuit, and the controlled end of the exhaust device is electrically connected to the main control circuit; When the concentration detection signal is greater than a preset concentration value, the main control circuit controls the exhaust device, the position positioning module and the alarm module to operate respectively.

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