CN106764456B - A kind of natural gas line leakage administrative security systems - Google Patents
A kind of natural gas line leakage administrative security systems Download PDFInfo
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- CN106764456B CN106764456B CN201611024068.9A CN201611024068A CN106764456B CN 106764456 B CN106764456 B CN 106764456B CN 201611024068 A CN201611024068 A CN 201611024068A CN 106764456 B CN106764456 B CN 106764456B
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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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Abstract
The invention discloses a kind of natural gas line leakage administrative security systems, data collection system, data communication system, central analysis processing centers；High quick pressure transmitter, flowmeter and temperature sensor are electrically connected with MCU respectively, and high quick pressure transmitter is arranged in pipeline, and flowmeter one end is arranged in pipeline, and temperature sensor is provided with inside and outside pipeline；The data of collection are transferred to central analysis processing center by communication system by data collection system, and central analysis processing center is analyzed data information, calculated.The application installation cost is lower, it is only necessary to data collection system be arranged in the head and the tail of pipeline, sensor is all arranged in the every place for no longer needing to pipeline, guarantees low cost, big coverage rate；The application's can be realized real time monitoring, once there is artificial destruction, can run through high quick pressure transmitter and determine leak time, while calculate leak point position rapidly according to high quick pressure transmitter, flowmeter and temperature sensor combination.
Description
Technical field
The present invention relates to natural gas line fields, and in particular to a kind of natural gas line leakage administrative security systems.
Background technique
Natural gas is transported to the pipeline of urban gas center or Industry enterprise customer from exploitation ground or treatment plant, it is also known as defeated
Feed channel.Natural gas is conveyed using natural gas line, is the sole mode that land largely conveys natural gas.In the world, pipeline is total
In length, natural gas line accounts for about half.
Existing gas pipeline is to be assembled by single cell by root.Modern collecting pipe and gas pipeline
It is to be formed by steel pipe through electric welding connection.Steel pipe has seamless pipe, spiral seam pipe, straight-seam pipes a variety of, and it is 529 that seamless pipe, which is suitable for caliber,
Millimeter pipeline below, spiral seam pipe and straight-seam pipes are suitable for large diameter pipeline.The pipe cross-sectional configuration of gathering line, it is complicated
It is inner coating-steel pipe-external insulation layer-heat preservation (cold insulation) layer；Simple then only steel pipe and external insulation layer, and inside coating
And heat preservation (cold insulation) layer adds determination depending on gas transmission technique again.
Existing pipeline feature: Gas pipeline system is a continuous closed conveying system；Make from conveying, being stored into user
With natural gas is in band pressure condition；Since the specific gravity of natural gas of conveying is small, hydrostatic head influences to be much smaller than liquid, high when design
When difference is less than 200 meters, hydrostatic head is negligible, and route is hardly limited by longitudinal landform；There is no fluid pipeline water attack danger
Evil；Occur when accident that harmfulness is big, involves that range is wide, and pipeline releases energy big, tearing length is longer, discharge once rupturing
Natural gas meets open fire, also easily leads to fire.
Existing Gas pipeline system can only be monitored early warning in designated position, since pipeline area coverage is wider, if
By artificial destruction in the middle part of pipeline, it early warning in time and can not repair in time, will cause even more serious environmental pollution and danger.Together
Shi Ruguo then will lead to higher cost in Near Pipelines dense distribution sensor and can not popularize.
Summary of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of low cost, big coverage rate, real time monitoring, rapidly and accurately positioning
Natural gas line leakage administrative security systems.
To realize the technical purpose, the scheme of the invention is: a kind of natural gas line leakage administrative security systems, packet
Include data collection system, data communication system, central analysis processing center；
The data collection system includes high quick pressure transmitter, flowmeter, temperature sensor, MCU, the Gao Min
Pressure transmitter, flowmeter and temperature sensor are electrically connected with MCU respectively, and the quick pressure transmitter of height is arranged in pipeline,
Described flowmeter one end is arranged in pipeline, and temperature sensor is provided with inside and outside pipeline；
The communication system includes radio receiving transmitting module, communication line and wireless network module, and the communication line is logical
Cross electrical connection access wire communication network and central analysis processing center communication connection, the radio receiving transmitting module and wireless network
Module passes through radio signal and central analysis processing center communication connection；
The data of collection are transferred to central analysis processing center by communication system by the data collection system, it is described in
Centre analysis processing center is analyzed data information, is calculated, and specific workflow is as follows:
The first step can form negative pressure fluctuation, while suction wave after generation artificial destruction, piping failure suddenly in pipeline
Can be along pipe transmmision, when the quick pressure transmitter of height of pipeline two sides monitors the signal of suction wave, and pressure and changes in flow rate are super
Nominal threshold value is crossed, then determines to leak, the data of collection are transferred to central analysis by communication system by data collection system
Processing center；
Second step, it is special in conjunction with noise, the water attack wave conversion in pipeline using the propagation law of wavelet transformation analysis suction wave
Point excludes noise jamming；
Third step is analyzed by the elasticity of pipe wall and physical parameter, the physical characteristic of liquid, is handled, is calculated
Negative pressure velocity of wave propagation, generally for the steel pipe of conveying crude oil, negative pressure velocity of wave propagation is 1000-1200m/s.
4th step, when the time that the instantaneous suction wave generated by measurement reaches the quick pressure transmitter of height of two sides calculates
Between it is poor, the spread speed of suction wave in time difference and pipeline is combined and calculates the position of leakage point；
5th step calculates leakage rate by the changes in flow rate, temperature and leak time of flowmeter；
6th step, central analysis processing center will determine that leak time, position and leakage rate feed back to the work of Near Pipelines
Make personnel, and at the leakage near pass through broadcast and direction board sending sound, light warning note；
Solenoid valve is additionally provided in the pipeline, the solenoid valve is electrically connected with relay, and the relay is electrically connected with MCU
It connects；
Both ends are respectively arranged with infrared transmission module and infrared receiving module on the outside of the pipeline, infrared transmission module and red
Outer receiving module is corresponding, and infrared receiving module is electrically connected with MCU；
Main Mike and noise reduction Mike are additionally provided on the outside of the pipeline, the main Mike and noise reduction Mike are electric with MCU respectively
Connection.
Beneficial effects of the present invention, the application installation cost are lower, it is only necessary to acquire system in the head and the tail setting data of pipeline
Sensor is all arranged in system, the every place for no longer needing to pipeline, guarantees low cost, big coverage rate；The application's can be realized in real time
Monitoring can run through high quick pressure transmitter and determine leak time, while according to high quick pressure once there is artificial destruction
Transmitter, flowmeter and temperature sensor combination calculate leak point position rapidly, and are issued in time by broadcast and direction board
Staff near sound, light warning note, can be realized quick response；Simultaneously can with real-time display monitor pipeline section pressure,
The data such as the curves such as flow and pressure, flow, maintain easily.
Specific embodiment
The present invention is described in further details combined with specific embodiments below.
Specific embodiment of the present invention is a kind of natural gas line leakage administrative security systems, including data are adopted
Collecting system, data communication system, central analysis processing center；
The data collection system includes high quick pressure transmitter, flowmeter, temperature sensor, MCU, the Gao Min
Pressure transmitter, flowmeter and temperature sensor are electrically connected with MCU respectively, and the quick pressure transmitter of height is arranged in pipeline,
Described flowmeter one end is arranged in pipeline, and temperature sensor is provided with inside and outside pipeline；
The communication system includes radio receiving transmitting module, communication line and wireless network module, and the communication line is logical
Cross electrical connection access wire communication network and central analysis processing center communication connection, the radio receiving transmitting module and wireless network
Module passes through radio signal and central analysis processing center communication connection；
The data of collection are transferred to central analysis processing center by communication system by the data collection system, it is described in
Centre analysis processing center is analyzed data information, is calculated, and specific workflow is as follows:
The first step can form negative pressure fluctuation, while suction wave after generation artificial destruction, piping failure suddenly in pipeline
Can be along pipe transmmision, when the quick pressure transmitter of height of pipeline two sides monitors the signal of suction wave, and pressure and changes in flow rate are super
Nominal threshold value is crossed, then determines to leak, the data of collection are transferred to central analysis by communication system by data collection system
Processing center；
Second step is converted using the propagation law of wavelet transformation analysis suction wave in conjunction with noise, the surge wave etc. in pipeline
Feature excludes noise jamming；
Third step is analyzed by the elasticity of pipe wall and physical parameter, the physical characteristic of liquid, is handled, is calculated
Negative pressure velocity of wave propagation, generally for the steel pipe of conveying crude oil, negative pressure velocity of wave propagation is about 1000-1200m/s.
4th step, when the time that the instantaneous suction wave generated by measurement reaches the quick pressure transmitter of height of two sides calculates
Between it is poor, the spread speed of suction wave in time difference and pipeline is combined and calculates the position of leakage point；
5th step calculates leakage rate by the changes in flow rate, temperature and leak time of flowmeter；
6th step, central analysis processing center will determine that leak time, position and leakage rate feed back to the work of Near Pipelines
Make personnel, and at the leakage near pass through broadcast and direction board sending sound, light warning note.It can be monitored and be managed with real-time display simultaneously
The data such as curves and pressure, flow such as pressure, the flow of section, maintain easily.
In order to improve security performance, the connection or closure of pipeline are conveniently remotely controlled, is additionally provided with electricity in the pipeline
Magnet valve, the solenoid valve are electrically connected with relay, and the relay is electrically connected with MCU.It, can when discovery leakage is extremely serious
To control the long-range closed duct of solenoid valve by relay, the environmental pollution that leakage generates is reduced.
It gives warning in advance to realize, both ends are respectively arranged with infrared transmission module and infrared receiving on the outside of the pipeline
Block, infrared transmission module and infrared receiving module are corresponding, and infrared receiving module is electrically connected with MCU.When infrared ray is to block,
Can with learnt object close to pipe surface, close object can be expelled by means such as whistle early warning.
In order to further increase early warning effect, main Mike and noise reduction Mike, the main wheat are additionally provided on the outside of the pipeline
Gram and noise reduction Mike be electrically connected respectively with MCU.Slot is generated when subtle rupture occurs for pipeline, since air leakage is smaller, pressure becomes
Change unobvious, high quick pressure transmitter is it is possible that erroneous judgement, and gas leakage at this time can generate the sharp air wave of low frequency, pass through
Main Mike can be collected into the variation of air wave, and then quickly find leak case, while pass through noise reduction wheat background correction sound, into
One step improves precision.
The natural gas line leakage administrative security systems of the application utilize pipeline wink using negative pressure wave method as basic skills
States model, using flow alarm function, pressure positioning and flow+alarm of pressure comprehensive analysis, positioning.Safe report greatly improved
Alert accuracy rate, while sufficiently large security monitoring coverage rate is kept at a lower cost.
When pipeline leaks, due to the pressure difference inside and outside pipeline, make the abrupt pressure reduction at leakage, at leakage around gas
Body forms negative pressure fluctuation since the presence of pressure difference is to supplement at leakage suddenly in pipeline.This suction wave is from leakage point to pipeline
Upper and lower end is propagated, and is decayed with index percent, is gradually smoothed down, and the situation of this suction wave and normal pressure fluctuation is absolutely not
Together, with the forward position of steeper.The quick pressure transmitter of height at both ends receives the negative pressure wave signal and collected system is collected and recorded.
System carries out the variation characteristic of combination pressure and flow to judge whether leakage occurs, and generates when being leaked by measurement instantaneous
Pressure wave reaches the time difference of upper and lower end and the spread speed of manifold pressure wave calculates the position of leakage point.In order to overcome
The interference of the factors such as duct noise, using noise, the water in the propagation law and pipeline of wavelet transformation and correlation analysis suction wave
The transformation feature such as wave is hit, and the elasticity of pipe wall and physical parameter, the physical characteristic of gas is combined to be analyzed, handled, counted
It calculates.For generally conveying the steel pipe of natural gas, negative pressure velocity of wave propagation is about 1000-1200m/s.The application Gao Min
Pressure transmitter is more sensitive for accident release, is suitble to monitoring because leaking caused by artificially, but for slowly corroding
It leaks very insensitive.
Time difference that the system is responded according to suction wave, duct length, pressure propagation speed, establish basic mathematical theory
Model.System again according to because of pipeline physical parameter, by factors such as the physicochemical property of defeated medium and temperature dampings to pressure wave
Attenuation change caused by transmission speed has carried out necessary compensation and amendment.
The above, only presently preferred embodiments of the present invention, are not intended to limit the invention, all skills according to the present invention
Art any trickle amendment, equivalent replacement and improvement substantially to the above embodiments, should be included in technical solution of the present invention
Protection scope within.
Claims (1)
1. a kind of natural gas line leakage administrative security systems, it is characterised in that: including data collection system, data communication
System, central analysis processing center；
The data collection system includes high quick pressure transmitter, flowmeter, temperature sensor, MCU, and the quick pressure of height becomes
Device, flowmeter and temperature sensor is sent to be electrically connected respectively with MCU, the quick pressure transmitter of height is arranged in pipeline, the stream
Meter one end is arranged in pipeline, and temperature sensor is provided with inside and outside pipeline；
The communication system includes radio receiving transmitting module, communication line and wireless network module, and the communication line passes through electricity
Connection access wire communication network and central analysis processing center communication connection, the radio receiving transmitting module and wireless network module
Pass through radio signal and central analysis processing center communication connection；
The data of collection are transferred to central analysis processing center, the center point by communication system by the data collection system
Analysis processing center is analyzed data information, is calculated, and specific workflow is as follows:
The first step can form negative pressure fluctuation, while suction wave meeting edge after generation artificial destruction, piping failure suddenly in pipeline
Pipe transmmision, when the quick pressure transmitter of height of pipeline two sides monitors the signal of suction wave, and pressure and changes in flow rate are more than volume
Determine threshold value, then determine to leak, the data of collection are transferred to central analysis processing by communication system by data collection system
Center；
Second step, using the propagation law of wavelet transformation analysis suction wave, in conjunction with the noise in pipeline, water attack wave conversion feature,
Exclude noise jamming；
Third step is analyzed by the elasticity of pipe wall and physical parameter, the physical characteristic of liquid, is handled, calculates negative pressure
Velocity of wave propagation, generally for the steel pipe of conveying crude oil, negative pressure velocity of wave propagation is 1000-1200m/s；
4th step, the time that the instantaneous suction wave generated by measurement reaches the quick pressure transmitter of height of two sides calculate the time
The spread speed of suction wave in time difference and pipeline is combined the position for calculating leakage point by difference；
5th step calculates leakage rate by the changes in flow rate, temperature and leak time of flowmeter；
6th step, central analysis processing center will determine that leak time, position and leakage rate feed back to the work people of Near Pipelines
Member, and at the leakage near pass through broadcast and direction board sending sound, light warning note.
Solenoid valve is additionally provided in the pipeline, the solenoid valve is electrically connected with relay, and the relay is electrically connected with MCU；
Both ends are respectively arranged with infrared transmission module and infrared receiving module on the outside of the pipeline, infrared transmission module and infrared connect
Receipts module is corresponding, and infrared receiving module is electrically connected with MCU；
It is additionally provided with main Mike and noise reduction Mike on the outside of the pipeline, the main Mike and noise reduction Mike are electrically connected with MCU respectively.
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| CN201611024068.9A CN106764456B (en) | 2016-11-17 | 2016-11-17 | A kind of natural gas line leakage administrative security systems |
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| CN201611024068.9A CN106764456B (en) | 2016-11-17 | 2016-11-17 | A kind of natural gas line leakage administrative security systems |
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| CN106764456B true CN106764456B (en) | 2019-04-19 |
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