CN110107815A - The leakage detection method and device of gas pipeline - Google Patents
The leakage detection method and device of gas pipeline Download PDFInfo
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- CN110107815A CN110107815A CN201811325974.1A CN201811325974A CN110107815A CN 110107815 A CN110107815 A CN 110107815A CN 201811325974 A CN201811325974 A CN 201811325974A CN 110107815 A CN110107815 A CN 110107815A
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- concentration
- leakage
- gas
- underground space
- leak
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- 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
Abstract
The invention discloses a kind of leakage detection method of gas pipeline and devices, wherein method is the following steps are included: detect the combustable gas concentration of multiple burning line peripheries underground space；Judge whether combustable gas concentration meets leak condition；If meeting leak condition, fuel gas pipeline leakage is determined, and obtain and report current leak position.This method according to the combustable gas concentration of multiple burning line peripheries underground space judge gas pipeline whether leakage, and it is obtained in leakage and reports current leak position, fuel gas pipeline leakage point Rapid Science is positioned with realizing, Accurate Prediction is carried out so as to combustible gas leakage biggest impact range, facilitates routine safety maintenance and the emergency disposal of leakage accident of gas ductwork.
Description
Technical field
The present invention relates to fuel gas pipeline leakage monitoring technical field, in particular to a kind of leakage detection method of gas pipeline
And device.
Background technique
In recent years, expanding rapidly with city size of China, pipeline network of fuel gas in city scale also increase rapidly, this exogenesis is covered
The crude oil and product oil transport pipeline that are embedded in suburb also become a part in city now.Such pipeline is buried in ground mostly
Under, occur directly or indirectly to generate a large amount of fuel gas after leakage, diffuses to the rainwater, sewage network and other municipal administrations of surrounding
In inspection shaft, since rainwater, sewage pipeline are interconnected, combustion gas can spread several kilometers along pipeline, when concentration reaches explosion limit, meet
Extensive serial blast will occur for incendiary source, and several kilometers of roads is caused to be ruined and mass casualties.
In the related technology, gas leakage detection means can be divided into monitoring and detection two major classes.Leakage monitoring is mainly to pipe
Road never drains to the monitoring for occurring to leak such a Newborn Process suddenly, and leak detection be then from pipeline external or it is internal into
Row periodic detection, detection have occurred and that the position of leakage, or to the weak spot that may be leaked on pipeline, such as combustion gas
The inspection of company just belongs to a kind of mode of pipe inspection, passes through the combustable gas concentration on periodic detection pipeline periphery, discovery pipe
Line leakage.Pipe inspection method cannot effectively avoid pipe because of the defect in terms of real-time for transporting the pipeline of high-risk medium
The generation of sequence of events after line leakage.
However, burning line leakage accident is mostly minute leakage, and gas has compressibility, therefore many based on front end
Flow or pressure are monitored in conjunction with the method for software model discovery pipeline leakage, for existing mesolow pipelines a large amount of in city
On minute leakage can not play preferable monitoring effect.Table 1 is the statistical classification of existing detecting pipeline leaks method, from prison
The feasibility of survey technology, real-time, validity etc. comprehensively consider the applicability to gas ductwork, it can be seen that existing monitoring
Means directly cannot effectively solve the problems, such as Urban Pipeline Carrying Natural Gas leakage real-time detection.
Table 1
Summary of the invention
The application is to be made based on inventor to the understanding of following problems and discovery:
For gas leakage explosion accident, optimal processing means are the suitable detection methods of selection, have just been sent out in combustion gas
Pipeline leakage is just monitored when raw leakage, to avoid a series of generation of subsequent hazard events.The prior art cannot
Well in the case where the initial stage of leakage discovery pipeline leakage, it is exactly by fuel gas conduit that one, which effectively solves pipeline leakage method,
After line leakage may the place that assemble, i.e., burning line is adjacent or the underground space that intersects in be monitored, such as to pipe
The rain bilge well on line periphery, burnt gas valve well, electricity well etc. are monitored, avoided while finding gas leakage after leakage
Explosion accident occurs for the space.
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, this method can be real an object of the present invention is to provide a kind of leakage detection method of gas pipeline
Now fuel gas pipeline leakage point Rapid Science is positioned, it is accurate pre- so as to be carried out to combustible gas leakage biggest impact range
It surveys, facilitates routine safety maintenance and the emergency disposal of leakage accident of gas ductwork.
It is another object of the present invention to the leak detecting devices for proposing a kind of gas pipeline.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes a kind of leakage detection method of gas pipeline, packet
It includes following steps: detecting the combustable gas concentration of multiple burning line peripheries underground space；Judging the combustable gas concentration is
It is no to meet leak condition；If meeting the leak condition, the fuel gas pipeline leakage is determined, and obtain and report and currently let out
Leak position.
The leakage detection method of the gas pipeline of the embodiment of the present invention, according to multiple burning line peripheries underground space can
Combustion gas bulk concentration judge gas pipeline whether leakage, and leakage when obtains and reports current leak position, with realization to combustion
The positioning of feed channel leakage point Rapid Science carries out Accurate Prediction so as to combustible gas leakage biggest impact range, facilitates
The routine safety of gas ductwork is safeguarded and the emergency disposal of leakage accident.
In addition, the leakage detection method of gas pipeline according to the above embodiment of the present invention can also have it is following additional
Technical characteristic:
Further, in one embodiment of the invention, further includes: obtain all burning lines circumferentially lower sky
Between each burning line periphery underground space explosion potential size characterization value and explosion injurious effects data；According to described
Explosion potential size characterization value and the explosion injurious effects data obtain each burning line periphery underground space
Risk of explosion assessed value；The risk of explosion assessed value is greater than the burning line periphery underground space of preset value as monitoring
The multiple burning line periphery underground space.
Further, in one embodiment of the invention, described to judge whether the combustable gas concentration meets leakage
Condition further comprises: if the current time combustable gas concentration of the burning line periphery underground space and previous moment are flammable
Gas concentration is all larger than or is equal to the first preset concentration, and the current time combustable gas concentration and previous moment fuel gas
The difference of concentration is greater than zero, then is determined as light grade leakage；If the current time combustable gas concentration in or be equal to described the
One preset concentration, and the difference of the current time combustable gas concentration and previous moment combustable gas concentration is greater than or equal to the
Two preset concentrations, then be determined as serious leak, wherein second preset concentration is greater than first preset concentration.
Further, in one embodiment of the invention, further includes: according to the current leak position and described flammable
Gas concentration identifies current dangerous region；According to the current dangerous region and preset alarm mechanism control preset alarm equipment report
It is alert.
Further, in one embodiment of the invention, further includes: corresponding combustion gas is controlled according to the leak position
The aperture of pipeline valve.
In order to achieve the above objectives, another aspect of the present invention embodiment proposes a kind of leak detecting device of gas pipeline,
It include: detection module, for detecting the combustable gas concentration of multiple burning line peripheries underground space；Judgment module, for sentencing
Whether the combustable gas concentration that breaks meets leak condition；Processing module, for when meeting the leak condition, described in judgement
Fuel gas pipeline leakage, and obtain and report current leak position.
The leak detecting device of the gas pipeline of the embodiment of the present invention, according to multiple burning line peripheries underground space can
Combustion gas bulk concentration judge gas pipeline whether leakage, and leakage when obtains and reports current leak position, with realization to combustion
The positioning of feed channel leakage point Rapid Science carries out Accurate Prediction so as to combustible gas leakage biggest impact range, facilitates
The routine safety of gas ductwork is safeguarded and the emergency disposal of leakage accident.
In addition, the leak detecting device of gas pipeline according to the above embodiment of the present invention can also have it is following additional
Technical characteristic:
Further, in one embodiment of the invention, further includes: module is obtained, for obtaining all combustion gas
After the explosion potential size characterization value of each burning line periphery underground space of the pipeline periphery underground space and explosion injury
Fruit data；Evaluation module, for obtaining institute according to the explosion potential size characterization value and the explosion injurious effects data
State the risk of explosion assessed value of each burning line periphery underground space；Setup module is used for the risk of explosion assessed value
Greater than preset value the burning line periphery underground space as monitoring the multiple burning line periphery underground space.
Further, in one embodiment of the invention, the judgment module is further used on burning line periphery
The current time combustable gas concentration and previous moment combustable gas concentration of the underground space are all larger than or are equal to the first preset concentration,
And the difference of the current time combustable gas concentration and previous moment combustable gas concentration be greater than zero when, be determined as that light grade is let out
Leakage；The current time combustable gas concentration in or be equal to first preset concentration, and the current time fuel gas
When concentration and the difference of previous moment combustable gas concentration are greater than or equal to the second preset concentration, it is determined as serious leak, wherein
Second preset concentration is greater than first preset concentration.
Further, in one embodiment of the invention, further includes: identification module, for according to the current leak
Position and the combustable gas concentration identify current dangerous region；Alarm module, for according to the current dangerous region and in advance
If alarm mechanism controls preset alarm equipment alarm.
Further, in one embodiment of the invention, further includes: control module, for according to the leak position
Control the aperture of corresponding valve of gas pipeline.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the leakage detection method flow chart according to the gas pipeline of one embodiment of the invention；
Fig. 2 is the leakage decision flow chart according to one embodiment of the invention；
Fig. 3 is the typical gas leakage monitoring curve synoptic diagram according to one embodiment of the invention；
Fig. 4 is one week pipeline first and last end pressure curve synoptic diagram according to one embodiment of the invention；
Fig. 5 is to change matched curve schematic diagram according to concentration in one day of one embodiment of the invention；
Fig. 6 is according to user's gas consumption and peak regulation curve synoptic diagram in one day of one embodiment of the invention；
Fig. 7 is the typical biogas monitoring curve schematic diagram according to one embodiment of the invention；
Fig. 8 is (to maximally diffuse in range without connected well) signal according to the combustion gas diffusion zone of one embodiment of the invention
Figure；
Fig. 9 is according to the combustion gas diffusion zone of one embodiment of the invention (maximally diffuse in range there are connected wells) signal
Figure；
Figure 10 is the fuel gas conduit schematic diagram leaked according to the possibility of one embodiment of the invention；
Figure 11 is that there is no connected well schematic diagrames according in the possibility diffusion zone of one embodiment of the invention；
Figure 12 is according to there are connected well schematic diagrames in the possibility diffusion zone of one embodiment of the invention；
Figure 13 is the structural schematic diagram according to the leak detecting device of the gas pipeline of one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The leakage detection method and device of the gas pipeline proposed according to embodiments of the present invention are described with reference to the accompanying drawings, it is first
The leakage detection method of the gas pipeline proposed according to embodiments of the present invention is first described with reference to the accompanying drawings.
Fig. 1 is the leakage detection method flow chart of the gas pipeline of one embodiment of the invention.
As shown in Figure 1, the leakage detection method of the gas pipeline the following steps are included:
In step s101, the combustable gas concentration of multiple burning line peripheries underground space is detected.
It is understood that the embodiment of the present invention can be by laying fuel gas intelligence in the adjacent underground space of burning line
Sensor can be monitored, real-time perception underground space combustable gas concentration can be effectively predicted early warning underground space explosion accident, will endanger
It eliminates in budding state in dangerous source.
Further, in one embodiment of the invention, the method for the embodiment of the present invention further include: obtain all combustion gas
After the explosion potential size characterization value of each burning line periphery underground space of the pipeline periphery underground space and explosion injury
Fruit data；Each burning line periphery underground space is obtained according to explosion potential size characterization value and explosion injurious effects data
Risk of explosion assessed value；Risk of explosion assessed value is greater than the burning line periphery underground space of preset value as the more of monitoring
A burning line periphery underground space.
It is understood that since there are a large amount of underground spaces on burning line periphery, when development sensors with auxiliary electrode is layouted,
Typical space must be chosen from numerous underground spaces and is monitored, with the feasibility for ensuring to monitor and is filled according to certain criterion
Divide property.Can generally risk assessment be carried out to the adjacent underground space of burning line, it is excellent to carry out point according to its risk of explosion value size
Change and lays.Adjacent underground space risk of explosion assessment is main to consider two parts: first is that explosion potential size characterization value；Second is that quick-fried
Fried injurious effects.It is simply that the higher underground space of those risk points is selected to carry out the laying of sensor, this layouts excellent
Change thinking is based primarily upon itself risk control to sensor inspection shaft is laid.
In step s 102, judge whether combustable gas concentration meets leak condition.
In one embodiment of the invention, judge whether combustable gas concentration meets leak condition, further comprise: such as
The current time combustable gas concentration and previous moment combustable gas concentration of the fruit burning line periphery underground space are all larger than or wait
In the first preset concentration, and the difference of current time combustable gas concentration and previous moment combustable gas concentration is greater than zero, then sentences
It is set to light grade leakage；If current time combustable gas concentration in or be equal to the first preset concentration, and current time fuel gas
Concentration and the difference of previous moment combustable gas concentration are greater than or equal to the second preset concentration, then are determined as serious leak, wherein
Second preset concentration is greater than the first preset concentration.
It is understood that the first preset concentration can be 0.5%VOL, the second preset concentration can be 1%VOL, when
So, those skilled in the art can be configured according to the actual situation, in this as example, be not specifically limited.
For example, as shown in Fig. 2, certain the inspection shaft monitoring point A for being furnished with equipment monitors adjacent double sampling moment t1, t2It is dense
Spend C1, C2.If t2Moment c2Concentration is more than or equal to 0.5%VOL.If concentration C1, C2It is all larger than 0.5%VOL, and C2-C1> 0, then sentence
Nearby there is slowly leakage in burning line to the fixed well.If 2C2-C1>=1%VOL then judges that nearby burning line exists quickly the well
Leakage.
In step s 103, if meeting leak condition, determine fuel gas pipeline leakage, and obtain and report current leak
Position.
It is understood that being determined as light grade leakage if combustable gas concentration meets leak condition or seriously letting out
Leakage, then should report current leak position.Specifically will introduce how to determine source of leaks below.
There are two aspects in inspection shaft methane concentration alarm gas source.It on the one hand is that organic matter is produced in microbiological anaerobic fermentation in well
On the one hand raw biogas leaks combustion gas for adjacent burning line.The two can change from methane concentration changes over time upper carry out area
Point.For gas leakage, concentration variation has with pipeline pressure compared with Important Relations.I.e. user's gas consumption larger period, combustion gas are let out
Leakage quantity will become smaller, otherwise user gas consumption is smaller, gas leakage amount will become larger, i.e., concentration will be compared in non-resident meal time well
Meal time is high.And for biogas, it is generated by anaerobic fermentation.Anaerobic fermentation is a complicated microbiological process, research
Point out temperature by influence the activity of methanogen certain enzymes into the cell influence methanogen growth rate and its to matrix
Metabolic rate.Temperature is 35 DEG C under normal conditions, and methanogen activity reaches highest in pipeline, and corresponding methane production is also most
Greatly, i.e., there are correlations with temperature for biogas concentration variation substantially curve, and further analysis is that well alarm is super if biogas concentration
Mark, then night is presented compared with the high trend of concentration in the daytime in the well methane concentration.
The methane gas monitored in the adjacent underground space of gas ductwork, on the one hand may be from natural gas line
Release and dispersion, the microbial action being on the other hand also possible in underground space darkness wet environment and the natural pond formed
Gas.For natural gas and biogas, ingredient difference is larger, will not generate ethane due to fermenting, and the natural gas that the country uses at present
Middle there are the ethane of 1~2%VOL, therefore enterprise's conventional means is to be using in portable ethane analyzer analysis gas at present
It is no that there are ethane to recognize gas as natural gas or biogas.It is still immature at present for ethane monitoring technology in inspection shaft, sensing
Device is expensive, therefore system not yet considers to monitor ethane concentration.In this context to improve accuracy of alarming, it is contemplated that logical
The methane concentration changing rule monitored is crossed to distinguish methane source.By being found to a large amount of Analysis on monitoring data, combustion gas
Cyclically-varying is presented in the methane concentration that leakage monitoring arrives, and the Pressure, Concentration, Temperature variation that biogas monitors is related, typical curve rule
Rule is analyzed as follows:
(1) typical gas leakage monitoring curve
As shown in figure 3, to monitor a gas leakage curve 22 days~July 3 June in 2016, it can be found that its is dense
Without intuitive rule between the variation and temperature of degree, and there is certain regularity in time, integrated curved was with one day
Cyclically-varying is presented in period, reaches peak value before and after 4:00 AM, and daytime, concentration was lower, and especially at candlelight, and section concentration reaches
To minimum point.Fig. 4 is pipeline first and last end pressure curve graph in domestic gas pipeline one week of certain city, from figure it is found that pipeline is first
End is always maintained at metastable pressure, and terminal pressure shows apparent cyclically-varying with the variation of gas consumption, week
Phase is about 24 hours.When the pressure highest point a point corresponding time is 28 in figure, that is, Tuesday 4:00 AM or so；Pressure is minimum
At when point is 115, that is, 7 points of evening Friday, this periodic law and variation tendency and the concentration of gas leakage change basic one
It causes.
Take monitoring point data one day to carry out monocycle analysis, upload within Real-time Monitoring Data every 30 minutes it is primary, altogether 48
Group data.Data are made into scatter plot and are fitted recurrence, matched curve is sine curve, and similarity reaches 0.99585.In well
It is begun to ramp up when concentration is from 0 to 5:00 AM or so and reaches highest, then continued to decline on daytime to touching the bottom at dusk, it
It begins to ramp up again afterwards.
Fig. 5 is gas pipeline end gas variable quantity curve in one day, when 6 from zero point to morning before, average gas consumption
Below be averaged air demand, and peak regulation curve rises until maximum value, system pressure rise；It is put down when evening 8 or so backward again
Equal gas consumption is above air demand, and the decline of peak regulation curve is until minimum value, system pressure decline, terminal pressure minimize value；9
When after pressure enter ascent stage again.Concentration curve in well when gas leakage in one day is set forth in Fig. 5 and Fig. 6
With resident's gas consumption change curve and peak regulation curve, the two variation tendency is essentially identical, has quite high registration.
According to above-mentioned analysis, the gas concentration changing rule monitored when gas leakage occurs has with burning line pressure
It closes, pressure is bigger, and leakage rate is bigger, then the concentration monitored is higher.The pressure monitoring or flow of burning line end in practice
Monitoring device is very limited, therefore can not be fully retrieved pressure or flow curve at monitoring site, but for one
For a tip line, corresponding resident's steam application rule is metastable, such as big for residential block dining period gas consumption,
Pressure is low in pipeline, then leakage rate reduces, and morning gas consumption is small, and pressure is high in pipeline, and leakage rate is consequently increased, Ju Minyong
Gas rule is in cyclically-varying with the time, and a cycle is usually one day, therefore cyclically-varying rule is presented in concentration curve.
(2) typical biogas leakage monitoring curve
Choose the higher scene of the typical biogas in many places, as shown in fig. 7, from curve it is not difficult to find out that, concentration variation when
Between on do not show apparent regularity, and concentration curve and temperature curve show stronger regularity: temperature increases,
Concentration increases, and temperature reduces, and concentration also decreases, and temperature held stationary, concentration also remains unchanged.Concentration is with temperature in well
The rule of variation and the activity of microorganism are related, and the microorganism that methane is generated in the underground space is mainly methanogen, and majority produces
Methane Pseudomonas medium temperature type, under anaerobic environment, can be kept between 10~65 DEG C activity, optimal temperature 20~45 DEG C it
Between, temperature is higher in this section, and fermentation is stronger, and the concentration measured is then higher.
Further, in one embodiment of the invention, the method that the present invention is implemented further include: according to current leak position
It sets and identifies current dangerous region with combustable gas concentration；It is set according to current dangerous region and preset alarm mechanism control preset alarm
Standby alarm.
It is understood that the embodiment of the present invention after determining source of leaks, according to the position of source of leakage and currently may be used
The concentration of combustion gas body, further confirms that danger zone, to issue early warning in time, to effectively improve the reliability of detection, passes through
Potential danger is evaded in timely early warning.It below will be made of how to determine that danger zone is further elaborated.
The embodiment of the present invention determines Release and dispersion model first, and the knowledge of danger zone is then carried out according to Release and dispersion model
Not, it specifically includes:
1, Release and dispersion model
There are two kinds of situation fuel gas, and neighboringly lower sky on the one hand can be diffused to by soil for the sprawling of fuel gas
Between or earth's surface, another party diffuse in neighbouring municipal pipeline (such as sewage pipeline, cable duct), and spread along pipeline.Fuel gas
It is related that dilation angle by factors is influenced such as overwrite media, diffusion time, leakage rate, leak pressure factor.Wherein manage
Road overwrite media to gas leakage diffusion maximum magnitude it is related, and can be divided into leakage range in there are two kinds of feelings whether connected well
Condition is discussed.
(1) it maximally diffuses in range without connected well
If maximally diffusing in range without connected well.Combustion gas diffusion zone and road surface material have compared with Important Relations at this time, and leakage is expanded
It is as shown in Figure 8 to dissipate region.
(2) there are connected wells within the scope of 12.5m
There are connected wells in leakage point maximum magnitude.Since rainwater, sewage pipeline are interconnected, fuel gas may be spread
Into the rainwater of surrounding, sewage network and other municipal inspection shafts, combustion gas is diffusible relatively remote along pipeline, when concentration reaches explosion
The limit, extensive serial blast will be occurred by encountering fire source, and several kilometers of roads is caused to be ruined and mass casualties.As shown in figure 9,
Such as 2# bilge well.If 2# bilge well is measuring point, it is subject to data measured；If 2# bilge well does not have measuring point, 3# bilge well
Methane is measured, then 2#, 3# are the region that possible explode, if 3# does not measure methane, 2# is demolition point, and 3# is not；
If 2#, 3# are not measuring points, 2# well is demolition point, and 3# is not.
2, danger zone identifies
In view of practical most of gas pipeline is all embedded under urban road, therefore combustion gas range of scatter is also by cement road
The limitation of face or bituminous pavement influences.Using combustible gas leakage well as the center of circle, R3It draws and justifies for radius, find all combustions in the region
Gas pipeline Li, i=1,2,3 ... n1,n1For positive integer.The union of all burning lines is the burning line that possible leak,
It is then monitored on the spot by relevant departments, determines pipeline leakage specific location.
With LiEnd point be the center of circle, range R is maximally diffused with combustion gas3Justify for radius work, by circle along LiMovement is inswept
Region is Si, gained region is that combustion gas may diffusion zone.All inspection shafts are danger zone within the scope of this.If in the region
There are connected wells, and a well of a well of connected well upstream and downstream is also classified as to the well that may be exploded.
Further, in one embodiment of the invention, the method that the present invention is implemented further include: controlled according to leak position
Make the aperture of corresponding valve of gas pipeline.
It is understood that after identifying danger zone and issuing early warning, the embodiment of the present invention is according to having determined
Leak position corresponding valve of gas pipeline is adjusted, for example, detect leakage than it is more serious when, then should be timely
The valve of leakage pipe is closed, to prevent gas from continuing to leak, is avoided because of persistently leakage bring harm；Alternatively, for another example,
If leakage is lighter, valve opening can be reduced according to the actual situation, on the one hand can guarantee user's normal use combustion gas,
On the other hand, can gas leakage be reduced to greatest extent, prevents from bringing security risk under the premise that security is guaranteed.
The leakage detection method of gas pipeline will be further elaborated by way of specific embodiment below.
As shown in Figure 10, certain inspection shaft A nearby has burning line, and objectively there are the condition that gas leakage occurs, concentration
Curvilinear motion is violent, and peak value often had in morning, was judged as gas leakage.
Using A as the center of circle, R3It draws and justifies for radius, find all burning line L in the regioni, these pipelines are that can let out
The burning line of leakage.
With LiEnd point be the center of circle, range R is maximally diffused with combustion gas3Justify for radius work, by circle along LiMovement is inswept
Region is Si, gained region is the possible diffusion zone of combustion gas, and all inspection shafts are danger zone within the scope of this.Also it is possible to expand
Dissipating region, there are two kinds of situations, as shown in figure 11, connected well are not present in possible diffusion zone, as shown in figure 12, may diffusion
There are connected wells in region.If there are connected wells in the region, by a well of a well of connected well upstream and downstream
It is classified as the well that may be exploded, such as 2# bilge well.If 2# bilge well is measuring point, it is subject to data measured；If 2# is dirty
Well does not have measuring point, and 3# bilge well measures methane, then 2#, 3# are the region that possible explode, if 3# does not measure methane,
Then 2# is demolition point, and 3# is not；If 2#, 3# are not measuring points, 2# well is demolition point, and 3# is not.
The leakage detection method of the gas pipeline proposed according to embodiments of the present invention, according to multiple burning lines circumferentially under
The combustable gas concentration in space judge gas pipeline whether leakage, and leakage when obtain and report current leak position, with
It realizes and fuel gas pipeline leakage point Rapid Science is positioned, carried out so as to combustible gas leakage biggest impact range accurate pre-
It surveys, facilitates routine safety maintenance and the emergency disposal of leakage accident of gas ductwork.
Show referring next to the structure for the leak detecting device of gas pipeline that attached drawing description proposes according to embodiments of the present invention
It is intended to.
Figure 13 is the structural schematic diagram of the leak detecting device of the gas pipeline of one embodiment of the invention.
As shown in figure 13, the leak detecting device 10 of the gas pipeline includes: detection module 100, judgment module 200 and place
Manage module 300.
Wherein, detection module 100 is used to detect the combustable gas concentration of multiple burning line peripheries underground space.Judge mould
Block 200 is for judging whether combustable gas concentration meets leak condition.Processing module 300 is used for when meeting leak condition, is sentenced
Determine fuel gas pipeline leakage, and obtains and report current leak position.The device 10 of the embodiment of the present invention may be implemented to fuel gas conduit
Leakage point Rapid Science positioning in road carries out Accurate Prediction so as to combustible gas leakage biggest impact range, facilitates combustion gas
The routine safety of pipe network is safeguarded and the emergency disposal of leakage accident.
Further, in one embodiment of the invention, the device 10 of the embodiment of the present invention further include: acquisition module,
Evaluation module and setup module.
Wherein, it is circumferentially lower empty to obtain each burning line of the module for obtaining all burning line peripheries underground space
Between explosion potential size characterization value and explosion injurious effects data.Evaluation module is used to be characterized according to explosion potential size
Value and explosion injurious effects data obtain the risk of explosion assessed value of each burning line periphery underground space.Setup module is used
In the burning line periphery underground space using risk of explosion assessed value greater than preset value as multiple burning line peripheries of monitoring
The underground space.
Further, in one embodiment of the invention, judgment module 200 be further used for burning line circumferentially
The current time combustable gas concentration and previous moment combustable gas concentration of down space are all larger than or are equal to the first preset concentration, and
When the difference of current time combustable gas concentration and previous moment combustable gas concentration is greater than zero, it is determined as light grade leakage；Working as
Preceding moment combustable gas concentration in or be equal to the first preset concentration, and current time combustable gas concentration and previous moment combustible gas
When the difference of bulk concentration is greater than or equal to the second preset concentration, it is determined as serious leak, wherein the second preset concentration is greater than first
Preset concentration.
Further, in one embodiment of the invention, the device 10 of the embodiment of the present invention further include: identification module and
Alarm module.
Wherein, identification module is used to identify current dangerous region according to current leak position and combustable gas concentration.Alarm
Module is used for according to current dangerous region and preset alarm mechanism control preset alarm equipment alarm.
Further, in one embodiment of the invention, the device 10 of the embodiment of the present invention further include: control module.
Wherein, control module is used to control the aperture of corresponding valve of gas pipeline according to leak position.
It should be noted that the explanation of the aforementioned leakage detection method embodiment to gas pipeline is also applied for the reality
The leak detecting device of the gas pipeline of example is applied, details are not described herein again.
The leak detecting device of the gas pipeline proposed according to embodiments of the present invention, according to multiple burning lines circumferentially under
The combustable gas concentration in space judge gas pipeline whether leakage, and leakage when obtain and report current leak position, with
It realizes and fuel gas pipeline leakage point Rapid Science is positioned, carried out so as to combustible gas leakage biggest impact range accurate pre-
It surveys, facilitates routine safety maintenance and the emergency disposal of leakage accident of gas ductwork.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of leakage detection method of gas pipeline, which comprises the following steps:
Detect the combustable gas concentration of multiple burning line peripheries underground space；
Judge whether the combustable gas concentration meets leak condition；And
If meeting the leak condition, the fuel gas pipeline leakage is determined, and obtain and report current leak position.
2. the leakage detection method of gas pipeline according to claim 1, which is characterized in that further include:
The explosion potential for obtaining each burning line periphery underground space of all burning line peripheries underground space is big
Small characterization value and explosion injurious effects data；
Each burning line week is obtained according to the explosion potential size characterization value and the explosion injurious effects data
The risk of explosion assessed value of the side underground space；
The risk of explosion assessed value is greater than the burning line periphery underground space of preset value as the multiple combustion of monitoring
The gas pipeline periphery underground space.
3. the leakage detection method of gas pipeline according to claim 1, which is characterized in that the judgement combustible gas
Whether bulk concentration meets leak condition, further comprises:
If the current time combustable gas concentration and previous moment combustable gas concentration of the burning line periphery underground space are big
In or be equal to the first preset concentration, and the difference of the current time combustable gas concentration and previous moment combustable gas concentration is big
In zero, then it is determined as light grade leakage；
If the current time combustable gas concentration in or be equal to first preset concentration, and the current time combustible gas
The difference of bulk concentration and previous moment combustable gas concentration is greater than or equal to the second preset concentration, then is determined as serious leak,
In, second preset concentration is greater than first preset concentration.
4. the leakage detection method of gas pipeline according to claim 1, which is characterized in that further include:
Current dangerous region is identified according to the current leak position and the combustable gas concentration；
According to the current dangerous region and preset alarm mechanism control preset alarm equipment alarm.
5. the leakage detection method of any one of -4 gas pipelines according to claim 1, which is characterized in that further include:
The aperture of corresponding valve of gas pipeline is controlled according to the leak position.
6. a kind of leak detecting device of gas pipeline characterized by comprising
Detection module, for detecting the combustable gas concentration of multiple burning line peripheries underground space；
Judgment module, for judging whether the combustable gas concentration meets leak condition；And
Processing module for when meeting the leak condition, determining the fuel gas pipeline leakage, and is obtained and is reported and currently let out
Leak position.
7. the leak detecting device of gas pipeline according to claim 6, which is characterized in that further include:
Module is obtained, for obtaining each burning line periphery underground space of all burning line peripheries underground space
Explosion potential size characterization value and explosion injurious effects data；
Evaluation module, it is described every for being obtained according to the explosion potential size characterization value and the explosion injurious effects data
The risk of explosion assessed value of a burning line periphery underground space；
Setup module, for the risk of explosion assessed value to be greater than to the burning line periphery underground space of preset value as monitoring
The multiple burning line periphery underground space.
8. the leak detecting device of gas pipeline according to claim 6, which is characterized in that the judgment module is further
It is all larger than for the current time combustable gas concentration and previous moment combustable gas concentration in the burning line periphery underground space
Or it is equal to the first preset concentration, and the difference of the current time combustable gas concentration and previous moment combustable gas concentration is greater than
When zero, it is determined as light grade leakage；The current time combustable gas concentration in or be equal to first preset concentration, and it is described
When the difference of current time combustable gas concentration and previous moment combustable gas concentration is greater than or equal to the second preset concentration, determine
For serious leak, wherein second preset concentration is greater than first preset concentration.
9. the leak detecting device of gas pipeline according to claim 6, which is characterized in that further include:
Identification module, for identifying current dangerous region according to the current leak position and the combustable gas concentration；
Alarm module, for according to the current dangerous region and preset alarm mechanism control preset alarm equipment alarm.
10. according to the leak detecting device of any one of the claim 6-9 gas pipeline, which is characterized in that further include:
Control module, for controlling the aperture of corresponding valve of gas pipeline according to the leak position.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811325974.1A CN110107815B (en) | 2018-11-08 | 2018-11-08 | Gas pipeline leakage detection method and device |
| SG11202006240UA SG11202006240UA (en) | 2018-11-08 | 2019-11-05 | Gas pipeline leakage detection method and apparatus |
| PCT/CN2019/115545 WO2020093986A1 (en) | 2018-11-08 | 2019-11-05 | Gas pipeline leakage detection method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811325974.1A CN110107815B (en) | 2018-11-08 | 2018-11-08 | Gas pipeline leakage detection method and device |
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| Publication Number | Publication Date |
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| CN110107815A true CN110107815A (en) | 2019-08-09 |
| CN110107815B CN110107815B (en) | 2021-04-06 |
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| CN201811325974.1A Active CN110107815B (en) | 2018-11-08 | 2018-11-08 | Gas pipeline leakage detection method and device |
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| Country | Link |
|---|---|
| CN (1) | CN110107815B (en) |
| SG (1) | SG11202006240UA (en) |
| WO (1) | WO2020093986A1 (en) |
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Also Published As
| Publication number | Publication date |
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| WO2020093986A1 (en) | 2020-05-14 |
| SG11202006240UA (en) | 2020-07-29 |
| CN110107815B (en) | 2021-04-06 |
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