Natural gas pipeline leakage monitoring system

Abstract

The invention relates to a natural gas pipeline leakage monitoring system applied to the field of gas monitoring, which comprises a gas pipe network management platform body, and the gas pipe network management platform body comprises a gas pipeline monitoring network system, a monitoring data transmission system, an emergency management system and a remote control system. The early warning type valve well lid is additionally arranged on the basis of an existing monitoring system, when a natural gas pipeline leaks, the adjacent early warning type valve well lid can be immediately triggered to give an alarm outwards, firstly, the concentration of leaked gas is effectively reduced through the water spraying effect of a water spraying head, and the probability of natural gas detonation is effectively reduced; when the water spraying head sprays water, passing pedestrians and vehicles can be warned to evacuate to a safe area as soon as possible, meanwhile, the probability that leaked natural gas is ignited accidentally can be effectively avoided, in addition, the raised protective cover and the lamplight effect of the warning lamp can also warn people and vehicles to remind residents around the valve well to evacuate as soon as possible, and the safety of the valve well is improved. Therefore, casualties are effectively reduced.

Description

Technical Field

[0001] The present invention relates to a natural gas pipeline leakage monitoring system, in particular to a natural gas pipeline leakage monitoring system applied to the field of gas monitoring. Background Art

[0002] It is well known that gas pipelines are closely related to the lives of thousands of households, but accidents such as gas leaks or explosions that occur from time to time make people always frightened. The safe operation of gas pipelines is crucial to maintaining social peace and protecting the lives of residents. Preventing sudden accidents is an important means to ensure people's safety and the health of the city's lifeline. At present, the monitoring method for natural gas pipeline leaks is to monitor the entire gas pipeline network, while the monitoring methods at important nodes, such as valve wells, are relatively weak.

[0003] In order to solve the problem of weak gas leakage monitoring at the valve well, a certain gas leakage monitoring system on the market adopts the design of installing a monitoring device in the valve well, which has a certain market share.

[0004] The specification of Chinese patent CN118775786A discloses a natural gas pipeline valve well leakage monitoring device. The motor of the invention drives the vortex pump to rotate. The vortex pump absorbs the gas containing natural gas inside the protective tube through the suction pipe. The absorbed leaked natural gas gas enters the filter tube through the intake pipe. The filter tube is filled with adsorption material. After the adsorption material absorbs the natural gas to a certain extent, the gas passes through two groups of inflation tubes to inflate the inside of two groups of sealing airbags. The sealing airbags are inflated and their outer walls expand to seal and block the inner walls of the two groups of connecting pipes, so as to separate the connecting pipes and the natural gas pipeline, and avoid the problem of natural gas continuing to enter the valve and causing leakage. The overall safety of use is high.

[0005] The specification of Chinese patent CN221946577U discloses a safety monitoring device for a gas valve well. The patented safety monitoring device for a gas valve well monitors the gas in the gas valve well through a gas sensor. When an abnormal gas value is detected, a signal is sent to an external controller through the gas sensor. The external controller controls the operation of the driving component. The operation of the driving component drives the first rotating shaft to rotate, and the rotation of the first rotating shaft drives the alarm component to work. At the same time, the rotation of the first rotating shaft drives the second pulley to rotate. The transmission effect between the first pulley, the second pulley and the belt drives the first pulley to rotate. The rotation of the first pulley drives the second rotating shaft to rotate. The rotation of the second rotating shaft drives the gear to rotate. The gear rotates and meshes with the rack, so that the rack moves to the left and slides into the slideway and compresses the second compression spring until the rack cannot move and repeatedly meshes with the gear under the action of the second compression spring. When the rack moves to the left, it drives the protective plate to open. At the same time, the rotation of the second rotating shaft also drives the exhaust blade to rotate, and the gas is discharged from the rectangular through groove, effectively reducing the concentration of leaked gas and increasing the safety of gas use.

[0006] Although there is a device in the prior art that sets an exhaust fan in the valve well to reduce the gas concentration, the exhaust fan is driven by a motor and the cut-off device is composed of a gear rack mechanism. Sparks are easily generated during operation, which in turn detonates the leaked gas, posing a certain risk. In addition, after the exhaust fan discharges the gas, the leaked gas will also gather around the outside of the valve well, which is not easy for passers-by, vehicles and surrounding residents to notice, and it is also easy to ignite the leaked gas. Moreover, when natural gas leaks, it is impossible to warn people around, resulting in increased casualties. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to let the personnel around the valve well know the natural gas leakage in time.

[0008] To solve the above problems, the present invention provides a natural gas pipeline leakage monitoring system, including a gas pipeline network management platform body, the gas pipeline network management platform body includes a gas pipeline monitoring network system, a monitoring data transmission system, an emergency management system and a remote control system, the gas pipeline monitoring network system includes a pipeline monitoring module and a valve well monitoring module, the pipeline monitoring module includes a distributed optical fiber acoustic wave vibration detection sensor arranged on the natural gas pipeline, the valve well monitoring module includes an early warning valve well cover installed on the valve well and a gas detector inside the valve well, the distributed optical fiber acoustic wave vibration detection sensor is electrically connected to the nearest adjacent early warning valve well cover through a control processor, the gas detector is also electrically connected to the early warning valve well cover through the control processor, the monitoring data transmission system includes a data collection module, a data processing module and a data sending module, the emergency management system includes a leakage point positioning module, a fire rapid response module and an alarm module, and the remote control system includes a pipeline valve closing module and a gas supply pipeline emergency cut-off module.

[0009] In the above-mentioned natural gas pipeline leakage monitoring system, when the gas pipeline network and valve wells around the early warning valve manhole cover leak, the early warning valve manhole cover can warn passers-by and vehicles, reminding people to stay away from danger in time, and use water spraying to effectively reduce the gas concentration, thereby effectively reducing the chance of explosion.

[0010] As a further improvement of the present application, a protective cover is placed above the early warning valve manhole cover, and a clearance groove 1 matching the protective cover is provided on the upper surface of the early warning valve manhole cover, a plurality of equally spaced and surrounding positioning columns are fixedly connected to the lower end side wall of the protective cover, and a plurality of positioning grooves matching the positioning columns are provided on the lower end side wall of the clearance groove 1, a water spray type explosion-proof device is fixedly connected to the middle of the lower end side wall of the protective cover, and a clearance groove 2 matching the water spray type explosion-proof device is provided in the middle of the lower end side wall of the clearance groove, a through cavity connected to the clearance groove 2 is provided on the lower end inner wall of the early warning valve manhole cover, and the early warning valve manhole cover is provided with a plurality of equally spaced and surrounding positioning columns, and a plurality of positioning grooves matching the positioning columns are provided on the lower end side wall of the protective cover, and a plurality of positioning grooves matching the positioning columns are provided on the lower end side wall of the early warning valve manhole cover. The lower end side wall of the valve manhole cover is fixedly connected with a water storage tank, and the middle inner wall of the water storage tank is provided with a through hole connected with the through cavity, a water column is inserted inside the through hole, and the water column penetrates into the through cavity and is fixedly connected with the lower end of the water spray explosion-proof device, both side walls of the through hole are provided with slide grooves, and electromagnets are installed at the bottom of the two slide grooves, the distributed optical fiber acoustic vibration detection sensor and the gas detector are electrically connected with the electromagnet through the control processor at the same time, and both side walls of the water column are fixedly connected with magnetic slides slidably connected with the slide grooves, and the magnetic slides repel the magnetism generated by the electromagnets; An annular cavity is provided on the inner wall of the water storage tank, and an isolation plate is fixedly connected to the inner wall of the annular cavity, and the isolation plate isolates the annular cavity into two upper and lower cavities, the upper cavity is a high-pressure gas cavity, and the lower cavity is a ballast cavity, a plurality of electromagnetic gas release valves are installed on the isolation plate and are distributed around at equal intervals, and the electromagnetic gas release valve is connected to the high-pressure gas cavity, a water bag is placed in the ballast cavity, and the interior of the water bag is filled with water, a pressure plate is sealingly and slidably connected to the inner wall of the ballast cavity, and the pressure plate is in contact with the upper end of the water bag, a groove is provided on the side wall of the slide near the electromagnetic gas release valve, and a contact is slidably connected to the inner wall of the groove, a pressure sensor is installed in the middle of the inner wall of the groove, and the pressure sensor is electrically connected to the electromagnetic gas release valve through a control processor, a plurality of symmetrically distributed elastic buffer nets are also fixedly connected between the contact and the inner wall of the groove, and the elastic buffer nets are distributed on both sides of the pressure sensor, and a high-pressure water is connected between the water column and the water bag. The water pipe is a kind of water pipe, and the inner wall of the water column is provided with a water delivery cavity connected with the high-pressure water pipe, the middle inner wall of the water spray type explosion proof device is provided with a main water channel connected with the water delivery cavity, and the inner wall of the water spray type explosion proof device is provided with a plurality of water branch channels which are distributed around with equal intervals and connected with the main water channel, the side wall of the water spray type explosion proof device is fixedly inlaid with a plurality of water spray heads connected with the water branch channels, when the natural gas pipeline leaks, the early warning valve manhole cover nearby is triggered, the protective cover will rise, and the water spray head will spray water outward, the water spraying can speed up the flow speed of the air and quickly discharge the natural gas gathered in the valve manhole, effectively reduce the gas concentration, thereby effectively reducing the probability of gas explosion, and at the same time, the raised protective cover and the water spraying phenomenon can also warn the passing pedestrians and vehicles, reminding them that there is a natural gas leak here, so that they can stay away as soon as possible, thereby effectively avoiding the danger brought by the natural gas explosion, and can also effectively reduce the probability of natural gas being ignited.

[0011] As a further improvement of the present application, a mounting groove is further provided on the side wall of the water spray explosion-proof device between two adjacent water spray heads, and a warning light electrically connected to the alarm module is installed in the mounting groove, and a diffuser plate is fixedly connected to the opening of the mounting groove. When a natural gas leak is detected, the warning light is triggered to turn on, and the light emitted by the warning light is scattered by the diffuser plate and then emitted outward to form a light curtain, thereby further playing an effective warning role.

[0012] As a further improvement of the present application, the diffuser plate includes a light-shielding matrix, the inner wall of which is fixedly inlaid with a plurality of light-guiding fiber columns distributed in a scattered manner, and the plurality of light-guiding fiber columns are symmetrically distributed on both sides of the light-shielding matrix. The light emitted by the warning light is guided by the light-guiding fiber columns and scattered outwards, thereby forming a fan-shaped light curtain, increasing the coverage area of ​​the light, thereby further effectively improving the warning effect.

[0013] As another improvement of the present application, each positioning column corresponds to a diffuser plate, and the positioning column includes a rigid column, and the side walls of the rigid column are fixedly inlaid with multiple reflective sheets, and the lower end of the rigid column is fixedly connected to a magnetic pad that is magnetically attracted to the positioning groove. The rigid column plays the role of a limit positioning column. When a vehicle presses on the early warning valve manhole cover, it can effectively prevent the protective cover from being brought out. Part of the light scattered by the diffuser plate will shine on the reflective sheet, and the reflective sheet will reflect the light again. In this way, pedestrians and vehicles passing through the valve well can see the light warning more clearly, and thus stay away from the danger source in time.

[0014] As another improved supplement of the present application, the remote control system also includes a water delivery pump installed in the valve well, and the water delivery pump is connected to the water delivery cavity in the water column through a water pipe. After the water stored in the water bag is used up, in order to allow the sprinkler head to continue to spray water to reduce the natural gas concentration, water continues to be delivered to the sprinkler head through the remotely controlled water delivery pump.

[0015] As another improvement of the present application, the early warning valve manhole cover and the protective cover are both made of high-strength material, and the upper surface of the protective cover is coated with a reflective coating. The reflective coating will be more conspicuous under the illumination of night lights, so that passers-by and vehicles can clearly see the raised protective cover to avoid bumping into it and causing injuries. At the same time, the reflective coating can also allow residents around the valve manhole to see it in time and evacuate to a safe area as soon as possible.

[0016] To summarize, by adding early warning valve manhole covers on the basis of the existing monitoring system, when a natural gas pipeline leaks, the nearby early warning valve manhole covers will be immediately triggered to sound an alarm. First, the water spraying effect of the sprinkler head can be used to effectively reduce the concentration of the leaked gas and effectively reduce the probability of natural gas explosion. When the sprinkler head sprays water, it can also warn passers-by and vehicles, reminding them to evacuate to a safe area as soon as possible. At the same time, it can also effectively avoid the probability of leaked natural gas being accidentally ignited. In addition, the raised protective cover and the lighting effect of the warning light can also warn people and vehicles, reminding residents around the valve well to evacuate as soon as possible, thereby effectively reducing the risk of casualties. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the monitoring system module of the first embodiment of the present application; Figure 2 This is a three-dimensional diagram of a warning valve manhole cover according to the first embodiment of the present application; Figure 3 This is a three-dimensional diagram of the early warning valve manhole cover of the first embodiment of the present application when giving an alarm; Figure 4 This is a front cross-sectional view of the early warning valve manhole cover before giving an alarm according to the first embodiment of the present application; Figure 5This is a front cross-sectional view of the early warning valve manhole cover of the first embodiment of the present application when giving an alarm; Figure 6 This is a top view of a cross-sectional view of a water spray explosion-proof device according to a second embodiment of the present application; Figure 7 for Figure 4 A magnified view of the structure at center A; Figure 8 This is a front cross-sectional view of a positioning column according to a second embodiment of the present application; Fig. 9 This is a front cross-sectional view of a diffuser plate according to a second embodiment of the present application.

[0018] Description of the numbers in the figure: 1 Early warning valve manhole cover, 101 make way slot one, 102 positioning slot, 103 make way slot two, 104 through cavity, 2 protective cover, 3 positioning column, 301 rigid column, 302 reflective sheet, 303 magnetic pad, 4 water spray explosion-proof device, 401 main water channel, 402 water channel, 5 water storage tank, 501 through hole, 502 slide, 6 water column, 7 electromagnet, 8 magnetic slide, 9 isolation plate, 10 electromagnetic gas release valve, 11 water bag, 12 pressure plate, 13 contact, 1301 elastic buffer net, 14 pressure sensor, 15 high-pressure water pipe, 16 sprinkler head, 17 warning light, 18 diffuser plate, 1801 light-proof matrix, 1802 optical fiber column. DETAILED DESCRIPTION

[0019] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0020] The first implementation method: Figure 1As shown, it includes a gas pipeline network management platform body, the gas pipeline network management platform body includes a gas pipeline monitoring network system, a monitoring data transmission system, an emergency management system and a remote control system, the gas pipeline monitoring network system includes a pipeline monitoring module and a valve well monitoring module, the pipeline monitoring module includes a distributed optical fiber acoustic wave vibration detection sensor arranged on the natural gas pipeline (which is a prior art, and the specific installation structure and working principle are well-known technologies for technicians in the relevant field, and will not be described in detail here), the valve well monitoring module includes an early warning valve well cover 1 installed on the valve well and a gas detector inside the valve well (the specific model is selected according to actual needs, and will not be described in detail here), the distributed optical fiber acoustic wave vibration detection sensor is electrically connected to the nearest adjacent early warning valve well cover 1 through a control processor Then, the gas detector is also electrically connected to the early warning valve manhole cover 1 through the control processor, the monitoring data transmission system includes a data collection module, a data processing module and a data sending module, the emergency management system includes a leakage point positioning module, a fire rapid response module and an alarm module, the remote control system includes a pipeline valve closing module and a gas supply pipeline emergency cut-off module, and the remote control system also includes a water delivery pump installed in the valve well, and the water delivery pump is connected to the water delivery cavity in the water column 6 through a water pipe. After the water stored in the water bag 11 is used up, in order to allow the water spray head 16 to continue to spray water to reduce the natural gas concentration, the remotely controlled water delivery pump continues to deliver water to the water spray head 16 (the specific connection structure and working principle between these modules are well-known technologies for technicians in the relevant field and will not be described in detail here); Figure 2 , 3 and Figure 4As shown, a protective cover 2 is placed above the early warning valve manhole cover 1. Both the early warning valve manhole cover 1 and the protective cover 2 are made of high-strength material (steel is preferred, and other materials can also be selected according to actual needs), and the upper surface of the protective cover 2 is coated with a reflective coating. The reflective coating will be more conspicuous under the illumination of night lights, so that passers-by and vehicles can clearly see the raised protective cover 2 to avoid bumping into it and causing injuries. At the same time, the reflective coating can also allow residents around the valve well to see it in time and evacuate to a safe area as soon as possible, and the upper surface of the early warning valve manhole cover 1 is provided with a yield groove 101 matching the protective cover 2, and the lower end side wall of the protective cover 2 is fixedly connected with a plurality of positioning columns 3 distributed around at equal intervals, and the lower end side wall of the yield groove 101 is provided with a plurality of positioning grooves 102 matching the positioning columns 3, and the middle part of the lower end side wall of the protective cover 2 is fixedly connected with a water spray explosion-proof device 4, and the middle part of the lower end side wall of the yield groove 101 is provided with a The water spray explosion-proof device 4 matches the second clearance groove 103, the lower inner wall of the early warning valve well cover 1 is provided with a through cavity 104 connected with the second clearance groove 103, the lower side wall of the early warning valve well cover 1 is fixedly connected with a water storage tank 5, and the middle inner wall of the water storage tank 5 is provided with a through hole 501 connected with the through cavity 104, the interior of the through hole 501 is inserted with a water column 6, and the water column 6 penetrates into the through cavity 104 and is fixedly connected with the lower end of the water spray explosion-proof device 4, the side walls on both sides of the through hole 501 are provided with a slide groove 502, and the bottom of the two slide grooves 502 are installed with an electromagnet 7 (the specific model is selected according to actual needs and is not described in detail here), the distributed optical fiber acoustic vibration detection sensor and the gas detector are electrically connected to the electromagnet 7 through the control processor at the same time, and the side walls on both sides of the water column 6 are fixedly connected with a magnetic slide 8 slidably connected with the slide groove 502, and the magnetic slide 8 repels the magnetism generated by the electromagnet 7; Figure 4 , 5 , 6 and Figure 7As shown, the inner wall of the water storage tank 5 is provided with an annular cavity, and the inner wall of the annular cavity is fixedly connected with an isolation plate 9, the isolation plate 9 isolates the annular cavity into two upper and lower cavities, the upper cavity is a high-pressure gas cavity, and the lower cavity is a ballast cavity, a plurality of electromagnetic gas release valves 10 (the specific model is selected according to actual needs, and will not be described in detail here) are installed on the isolation plate 9 and are distributed around at equal intervals, and the electromagnetic gas release valve 10 is connected with the high-pressure gas cavity, a water bag 11 is placed in the ballast cavity, and the interior of the water bag 11 is filled with water, and the inner wall of the ballast cavity is sealed and slidably connected with a pressure plate 1 2, and the pressure plate 12 is in contact with the upper end of the water bag 11, a groove is opened on the side wall of the slide 502 close to the electromagnetic gas release valve 10, and a contact 13 is slidably connected to the inner wall of the groove, and a pressure sensor 14 is installed in the middle of the inner wall of the groove (the specific model is selected according to actual needs and is not described in detail here), and the pressure sensor 14 is electrically connected to the electromagnetic gas release valve 10 through the control processor, and a plurality of symmetrically distributed elastic buffer nets 1301 (preferably rubber material is used, and can also be selected according to actual needs) are fixedly connected between the contact 13 and the inner wall of the groove The elastic buffer net 1301 is distributed on both sides of the pressure sensor 14, a high-pressure water pipe 15 is connected between the water column 6 and the water bag 11, and a water delivery cavity connected to the high-pressure water pipe 15 is opened on the inner wall of the water column 6, a main water channel 401 connected to the water delivery cavity is opened on the middle inner wall of the water spray type explosion-proof device 4, and a plurality of water diversion channels 402 distributed around and connected to the main water channel 401 are opened on the inner wall of the water spray type explosion-proof device 4 at equal intervals, and a plurality of water spray heads 16 connected to the water diversion channels 402 are fixedly inlaid on the side wall of the water spray type explosion-proof device 4 When a natural gas pipeline leaks, the nearby early warning valve well cover 1 is triggered, the protective cover 2 rises, and the water spray head 16 sprays water outward. The water spray can speed up the flow of air to quickly discharge the natural gas accumulated in the valve well, effectively reducing the gas concentration, thereby effectively reducing the probability of gas explosion. At the same time, the rising protective cover 2 and the water spray phenomenon can also warn passing pedestrians and vehicles that there is a natural gas leak here, so that they can stay away as soon as possible, effectively avoiding the danger brought by the natural gas explosion, and can also effectively reduce the probability of natural gas being ignited.

[0021] The second implementation method: Figure 6 As shown, a mounting groove is further provided on the side wall of the water spray explosion-proof device 4 between two adjacent water spray heads 16, and a warning light 17 (the specific model is selected according to actual needs and will not be described in detail here) electrically connected to the alarm module is installed in the mounting groove, and a diffuser plate 18 is fixedly connected to the opening of the mounting groove. When a natural gas leak is detected, the warning light 17 is triggered to turn on, and the light emitted by the warning light 17 is scattered by the diffuser plate 18 and then emitted outward to form a light curtain, thereby further playing an effective warning role; Fig. 9As shown, the light diffuser 18 includes a light-shielding substrate 1801, and the inner wall of the light-shielding substrate 1801 is fixedly inlaid with a plurality of light-guiding fiber columns 1802 distributed in a scattered shape, and the plurality of light-guiding fiber columns 1802 are symmetrically distributed on both sides of the light-shielding substrate 1801. The light emitted by the warning light 17 is guided by the light-guiding fiber columns 1802 to be scattered outward, thereby forming a fan-shaped light curtain, increasing the coverage area of ​​the light, and further effectively improving the warning effect; Figure 8 As shown, each positioning column 3 corresponds to a diffuser plate 18, and the positioning column 3 includes a rigid column 301. The side wall of the rigid column 301 is fixedly inlaid with multiple reflective sheets 302, and the lower end of the rigid column 301 is fixedly connected to a magnetic pad 303 that is magnetically attracted to the positioning groove 102. The rigid column 301 plays the role of positioning the positioning column 3. When a vehicle presses on the early warning valve well cover 1, it can effectively prevent the protective cover 2 from being brought out. A part of the light scattered by the diffuser plate 18 will shine on the reflective sheet 302, and the reflective sheet 302 will reflect the light again, so that pedestrians and vehicles passing through the valve well can see the light warning more clearly, so as to stay away from the danger source in time.

[0022] The working principle of this scheme is as follows: the distributed optical fiber acoustic wave vibration detection sensor monitors the gas pipeline network, and the gas detector monitors the valve well. When a natural gas leak is detected, the distributed optical fiber acoustic wave vibration detection sensor and the gas detector transmit the monitored data to the gas pipeline network management platform through the data sending module. At the same time, the leakage point positioning module also sends the location of the leakage point to the platform. Then the platform activates the fire rapid response module and the alarm module according to the received data. The platform immediately cuts off the gas supply pipeline and pipeline valve at the leakage point through the remote control system. When a leak occurs in the natural gas pipeline and the valve well, the alarm module first triggers the electromagnet 7. The magnetic force generated by the electromagnet 7 repels the magnetic slide 8 upward. When the magnetic slide 8 moves upward, it drives the protective cover 2, the water spray explosion-proof device 4 and the water column 6 to rise. When the magnetic slide 8 passes through the contact 13, The extrusion contact 13 triggers the pressure sensor 14, and the pressure sensor 14 further triggers the electromagnetic gas release valve 10 to release high-pressure gas. The high-pressure gas presses down the pressure plate 12, and the pressure plate 12 further presses down the water bag 11. Since the position of the water spray head 16 is higher than the liquid level of the water bag 11, water will not spray out from the water spray head 16 before the water bag 11 is pressed down. When the water bag 11 is pressed down by the pressure plate 12, water will spray out from the water spray head 16. The water flow of the sprayed water can accelerate the flow rate of the air, thereby quickly discharging the natural gas in the valve well, thereby effectively reducing the gas concentration. At the same time, the alarm module starts the warning light 17 to emit rays. The light emitted by the warning light 17 is guided by the optical fiber column 1802 and scattered outward, thereby forming a fan-shaped light curtain, increasing the coverage area of ​​the light, so that passers-by and vehicles can see clearly and evacuate to a safe area in time.

[0023] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A natural gas pipeline leakage monitoring system, characterized in that: The invention comprises a gas pipeline network management platform body, the gas pipeline network management platform body comprises a gas pipeline monitoring network system, a monitoring data transmission system, an emergency management system and a remote control system, the gas pipeline monitoring network system comprises a pipeline monitoring module and a valve well monitoring module, the pipeline monitoring module comprises a distributed optical fiber acoustic wave vibration detection sensor arranged on the natural gas pipeline, the valve well monitoring module comprises an early warning valve well cover (1) installed on the valve well and a gas detector inside the valve well, the distributed optical fiber acoustic wave vibration detection sensor is electrically connected to the nearest adjacent early warning valve well cover (1) through a control processor, the gas detector is also electrically connected to the early warning valve well cover (1) through a control processor, the monitoring data transmission system comprises a data collection module, a data processing module and a data sending module, the emergency management system comprises a leakage point positioning module, a fire rapid response module and an alarm module, and the remote control system comprises a pipeline valve closing module and a gas supply pipeline emergency shutoff module.

2. A natural gas pipeline leakage monitoring system according to claim 1, characterized in that: A protective cover (2) is placed above the early warning valve well cover (1), and a first clearance groove (101) matching the protective cover (2) is provided on the upper surface of the early warning valve well cover (1), a plurality of equidistantly distributed positioning columns (3) are fixedly connected to the lower end side wall of the protective cover (2), and a plurality of positioning grooves (102) matching the positioning columns (3) are provided on the lower end side wall of the clearance groove (101), a water spray type explosion-proof device (4) is fixedly connected to the middle of the lower end side wall of the protective cover (2), and a second clearance groove (103) matching the water spray type explosion-proof device (4) is provided on the middle of the lower end side wall of the clearance groove (101), and a through cavity (104) communicating with the second clearance groove (103) is provided on the lower end inner wall of the early warning valve well cover (1), and the lower end of the early warning valve well cover (1) is provided with a plurality of equidistantly distributed positioning columns (3) and a plurality of positioning grooves (102) matching the positioning columns (3) are provided on the lower end side wall of the protective cover (2). A water storage tank (5) is fixedly connected to the end side wall, and a through hole (501) connected to the through cavity (104) is provided on the middle inner wall of the water storage tank (5), a water column (6) is inserted into the through cavity (501), and the water column (6) penetrates into the through cavity (104) and is fixedly connected to the lower end of the water spray explosion-proof device (4), both side walls of the through hole (501) are provided with slide grooves (502), and the bottoms of the two slide grooves (502) are both installed with electromagnets (7), the distributed optical fiber acoustic wave vibration detection sensor and the gas detector are electrically connected to the electromagnet (7) through a control processor at the same time, and both side walls of the water column (6) are fixedly connected to magnetic slides (8) slidably connected to the slide grooves (502), and the magnetic slides (8) repel the magnetism generated by the electromagnet (7); The inner wall of the water storage tank (5) is provided with an annular cavity, and the inner wall of the annular cavity is fixedly connected to an isolation plate (9), the isolation plate (9) isolates the annular cavity into two upper and lower cavities, the upper cavity being a high-pressure gas cavity, and the lower cavity being a ballast cavity, a plurality of electromagnetic gas release valves (10) are installed on the isolation plate (9) and are distributed around the cavity at equal intervals, and the electromagnetic gas release valves (10) are connected to the high-pressure gas cavity, a water bag (11) is placed in the ballast cavity, and the interior of the water bag (11) is filled with water, the inner wall of the ballast cavity is sealingly slidably connected to a pressure plate (12), and the pressure plate (12) is in contact with the upper end of the water bag (11), the side wall of the slide groove (502) close to the electromagnetic gas release valve (10) is provided with a groove, and the inner wall of the groove is slidably connected to a contact (13), a pressure sensor (14) is installed in the middle of the inner wall of the groove, and the pressure sensor (14) is connected to the upper end of the water bag (11), and the pressure sensor (14) is connected to the upper end of the water bag (11), and the pressure sensor (14) is connected to the upper end of the water bag (11), and the pressure sensor (14) is connected to the upper end of the water bag (11), and the pressure sensor (14) is connected to the upper end of the water bag (11). The sensor (14) is electrically connected to the electromagnetic gas release valve (10) through a control processor; a plurality of symmetrically distributed elastic buffer nets (1301) are fixedly connected between the contact (13) and the inner wall of the groove, and the elastic buffer nets (1301) are distributed on both sides of the pressure sensor (14); a high-pressure water pipe (15) is connected between the water column (6) and the water bag (11); and a water delivery cavity connected to the high-pressure water pipe (15) is provided on the inner wall of the water column (6); a main water channel (401) connected to the water delivery cavity is provided on the middle inner wall of the water spray type explosion-proof device (4); and a plurality of water diversion channels (402) distributed around the main water channel (401) at equal intervals and connected to the main water channel (401) are provided on the inner wall of the water spray type explosion-proof device (4); and a plurality of water spray heads (16) connected to the water diversion channels (402) are fixedly embedded on the side wall of the water spray type explosion-proof device (4).

3. A natural gas pipeline leakage monitoring system according to claim 2, characterized in that: The side wall of the water spray explosion-proof device (4) located between two adjacent water spray heads (16) is also provided with a mounting groove, and a warning light (17) electrically connected to the alarm module is installed in the mounting groove, and a diffuser plate (18) is fixedly connected to the opening of the mounting groove.

4. A natural gas pipeline leakage monitoring system according to claim 3, characterized in that: The light diffusion plate (18) comprises a light-shielding base (1801), the inner wall of the light-shielding base (1801) being fixedly inlaid with a plurality of light-guiding fiber columns (1802) distributed in a scattered manner, and the plurality of light-guiding fiber columns (1802) being symmetrically distributed on both sides of the light-shielding base (1801).

5. A natural gas pipeline leakage monitoring system according to claim 2, characterized in that: Each positioning column (3) corresponds to a diffuser plate (18), and the positioning column (3) comprises a rigid column (301), a plurality of reflective sheets (302) are fixedly inlaid on the side wall of the rigid column (301), and a magnetic pad (303) that is magnetically attracted to the positioning groove (102) is fixedly connected to the lower end of the rigid column (301).

6. A natural gas pipeline leakage monitoring system according to claim 2, characterized in that: The remote control system further comprises a water delivery pump installed in the valve well, and the water delivery pump is connected to the water delivery cavity in the water column (6) through a water pipe.

7. A natural gas pipeline leakage monitoring system according to claim 1, characterized in that: The early warning valve manhole cover (1) and the protective cover (2) are both made of high-strength material, and the upper surface of the protective cover (2) is coated with a reflective coating.

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