CN109827075A - A kind of method of the contactless remote detection leakage of pair of outdoor aerial gas pipeline - Google Patents
A kind of method of the contactless remote detection leakage of pair of outdoor aerial gas pipeline Download PDFInfo
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- CN109827075A CN109827075A CN201910268721.3A CN201910268721A CN109827075A CN 109827075 A CN109827075 A CN 109827075A CN 201910268721 A CN201910268721 A CN 201910268721A CN 109827075 A CN109827075 A CN 109827075A
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Abstract
The invention discloses the methods of the contactless remote detection leakage of a kind of pair of outdoor aerial gas pipeline, the following steps are included: a, determining leak detection point: observing leakage point position to be detected, and choose at pipe joint or pipeline configuration exception is as leak detection point；B, it determines erect-position point: after determining leak detection point, three erect-position points being set in face leak detection point, to offset 2-3m on the left of leakage point and to offset 2-3m on the right side of leak detection point respectively；C, leak detection；D, data are analyzed；E, data record.Beneficial effect is: by using infrared detection technology, the inconsistent feature of the wave band reflected in light wave using methane after natural gas leaking realizes the leak detection in high-altitude, remote outdoor aerial gas pipeline, easy to operate, highly-safe；By the multi-direction measurement of multiple spot to leak detection point, comprehensive assessment can be carried out to the leak condition of combustion gas, improve detection accuracy.
Description
Technical field
The present invention relates to fuel gas pipeline leakage detection technique fields, and in particular to a kind of pair of outdoor aerial gas pipeline is non-to be connect
The method that touch detects leakage at a distance.
Background technique
The leak detection of gas pipeline is usually pump suction type and the detection of electronic catalytic formula at present.
Current common Portable alarm leak detection uses semiconductor detection technique, is using the sensor of detection
The oxide for being added to the micro golden noble metals such as platinum and palladium is made through semiconductor material made of high temperature sintering, this sensor conductance
Rate changes and changes to judge surveyed gas concentration with gas concentration in environment, sentences according to the concentration values of sensor response out
It is disconnected whether to leak and leakage situation；
Pump suction type leak detector detects gas pipeline, and technical characterstic is to be matched by detecting element and compensating element,
Constitute measuring bridge ,-determine temperature under the conditions of, under the action of detecting element carrier surface and catalyst nothing occurs for fuel gas
Flame burning, bed temperature increase, and internal platinum wire resistance also accordingly increases, thus make balanced bridge disequilibrium, output one
A electric signal directly proportional to combustable gas concentration.By measuring the size of the resistance variations of platinum filament, it is known that imflammable gas
Concentration.
Above two detection mode can only carry out the proximity detection of contact, can not be to outdoor overhead line and high-altitude
Route carries out leak detection.
Summary of the invention
The object of the invention is that it is non-contact to provide a kind of pair of outdoor aerial gas pipeline to solve the above-mentioned problems
The method that formula detects leakage at a distance, preferred technical solution includes and can pass through in many technical solutions provided by the invention
Infrared technology is realized according to the inconsistent feature of frequency range is reflected after natural gas leaking in the broadcast to outdoor aerial fuel gas conduit
The technical effects such as the contactless leak detection in road, elaboration as detailed below.
To achieve the above object, the present invention provides following technical schemes:
The method of the contactless remote detection leakage of a kind of pair of outdoor aerial gas pipeline provided by the invention, including with
Lower step: it a, determines leak detection point: observing leakage point position to be detected, and choose at pipe joint or pipeline configuration is different
Often place is used as leak detection point；
B, erect-position point is determined: after determining leak detection point, respectively in face leak detection point, to deviating 2- on the left of leakage point
3m and three erect-position points, respectively second station site, first stop site and third are set to offset 2-3m on the right side of leak detection point
Erect-position point；
C, leak detection: operation signal detector is stood respectively emits leak detection point top position in three erect-position points
Laser signal, and be radiated on physical object after signal optical source is passed through leak detection point, the letter after physical object reflects
Number light source is back to detector, and Internal reforming in detector is electric signal, and is shown on signal sensor；
D, data are analyzed: corresponding electric signal numerical value on three erect-position points being averaged, in the numerical value and standard value
Corresponding methane concentration is found in contrast table, the methane concentration as the leak detection point；
E, data record: the methane concentration detected in step d is recorded.
Preferably, when determining erect-position point, taking the second station site two sides 2m of face leak detection point in the step b
Place is respectively as first stop site and third erect-position point.
Preferably, during leak detection, needing to move up laser signal at leak detection point in the step c
20-30cm。
Preferably, physical object is wall, trees or column in the step c.
Preferably, lateral distance of the operator away from leak detection point is 2-5m in the step c.
To sum up, the beneficial effects of the present invention are: 1, by using infrared detection technology, utilize first after natural gas leaking
The inconsistent feature of the wave band that alkane reflects in light wave realizes the leakage inspection in high-altitude, remote outdoor aerial gas pipeline
It surveys, it is easy to operate, it is highly-safe；
2, by the multi-direction measurement of multiple spot to leak detection point, comprehensive assessment can be carried out to the leak condition of combustion gas, mentioned
High measurement accuracy.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is detection operation chart of the invention；
Fig. 2 is detection point schematic diagram of the invention.
The reference numerals are as follows:
1, signal sensor；2, leak detection point；3, gas pipeline；4, first stop site；5, second station site；6, third
Erect-position point.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Referring to shown in Fig. 1-Fig. 2, the present invention provides the contactless remote detections of a kind of pair of outdoor aerial gas pipeline
The method of leakage, principle are to have one at 3.33 μm of infrared light wavelength using methane gas compared with strong absworption peak value, remove first
Alkane outer gas foreign gas the wavelength light is absorbed it is unobvious, by analyze the laser spectrum of the methane adsorption wavelength light with
Achieve the purpose that detect methane and its concentration, since the light of corresponding wavelength almost can only be by methane adsorption, not by other gases
Influence, therefore to the light of the wave band carry out detection can be improved methane leakage detection accuracy, comprising the following steps: a, really
Determine leak detection point 2: observing leakage point position to be detected, and chooses at pipe joint or pipeline configuration exception is as letting out
Missing inspection measuring point 2 is chosen at the pipe joint for being easy leakage or pipe surface breakage is as test point；
B, erect-position point is determined: after determining leak detection point 2, respectively in face leak detection point 2, to deviating on the left of leakage point
Three erect-position points, respectively second station site 5, first stop site 4 and third erect-position are set with to offset on the right side of leak detection point 2
Point 6, three erect-position points are arranged carries out methane leakage detection respectively, the diversity of the sampling of leak detection point 2 can be improved, to pass through
To the synthesis of three data, the accuracy of methane leakage Concentration Testing is improved, in the detection process, if not examining in the second test point
Methane signal out then can determine whether this test point No leakage situation；
C, leak detection: operation signal detector 1 is stood respectively sends out 2 top position of leak detection point in three erect-position points
Laser signal is penetrated, and is radiated on physical object after signal optical source is passed through leak detection point 2, after physical object reflects
Signal optical source is back to detector, and Internal reforming in detector is electric signal, and is shown accordingly on signal sensor 1
Numerical value and image information；
D, data are analyzed: corresponding electric signal numerical value on three erect-position points being averaged, in the numerical value and standard value
Corresponding methane concentration is found in contrast table, the methane concentration as the leak detection point 2；
E, data record: the methane concentration detected in step d is recorded.
As optional embodiment, in the step b, when determining erect-position point, the second station of face leak detection point 2 is taken
It is right in the range of spacing 4m by being arranged on respectively as first stop site 4 and third erect-position point 6 at 5 two sides 2m of site
The methane leakage data of leak detection point 2 carry out multiple spot detection, can improve 2 detection data of leak detection point by being averaged
Precision；
In the step c, during leak detection, need laser signal moving up 30cm at leak detection point 2, due to
Methane is lighter compared with air, then drifts upwards after leakage, can by will move on laser signal at 2 top 30cm of leak detection point
The preferably leak condition of reaction natural gas, and can prevent gas pipeline 3 from blocking to laser signal, to improve leakage
The precision of 2 detection data of test point；
Physical object is wall, trees or column in the step c；
In the step c, lateral distance of the operator away from leak detection point 2 is 2-5m, and the lateral distance the close, detects
Precision is higher, but since part test point position is difficult to reach, needs to carry out position tune to test point in this lateral distance
It is whole.
By using infrared detection technology, the wave band reflected in light wave using methane after natural gas leaking is inconsistent
Feature realizes the leak detection in high-altitude, remote outdoor aerial gas pipeline, easy to operate, highly-safe；
By the multi-direction measurement of multiple spot to leak detection point 2, comprehensive assessment can be carried out to the leak condition of combustion gas, improved
Detection accuracy.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (5)
1. the method for the contactless remote detection leakage of a kind of pair of outdoor aerial gas pipeline, which is characterized in that including following
Step: it a, determines leak detection point: observing leakage point position to be detected, and choose at pipe joint or pipeline configuration is abnormal
Place is used as leak detection point；
B, determine erect-position point: after determining leak detection point, respectively face leak detection point, to deviate on the left of leakage point 2-3m and
Three erect-position points, respectively second station site, first stop site and third erect-position are arranged in offset 2-3m on the right side of to leak detection point
Point；
C, leak detection: operation signal detector is stood respectively emits laser to leak detection point top position in three erect-position points
Signal, and be radiated on physical object after signal optical source is passed through leak detection point, the signal light after physical object reflects
Source is back to detector, and Internal reforming in detector is electric signal, and is shown on signal sensor；
D, data are analyzed: corresponding electric signal numerical value on three erect-position points being averaged, in the comparison of the numerical value and standard value
Corresponding methane concentration is found on table, the methane concentration as the leak detection point；
E, data record: the methane concentration detected in step d is recorded.
2. the method for the contactless remote detection leakage of a kind of pair of outdoor aerial gas pipeline according to claim 1,
It is characterized in that: in the step b, when determining erect-position point, taking and make respectively at the second station site two sides 2m of face leak detection point
For first stop site and third erect-position point.
3. the method for the contactless remote detection leakage of a kind of pair of outdoor aerial gas pipeline according to claim 1,
It is characterized in that: in the step c, during leak detection, needing laser signal moving up 20-30cm at leak detection point.
4. the method for the contactless remote detection leakage of a kind of pair of outdoor aerial gas pipeline according to claim 1,
Be characterized in that: physical object is wall, trees or column in the step c.
5. the method for the contactless remote detection leakage of a kind of pair of outdoor aerial gas pipeline according to claim 1,
Be characterized in that: in the step c, lateral distance of the operator away from leak detection point is 2-5m.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113639206A (en) * | 2020-05-11 | 2021-11-12 | 中国石油天然气股份有限公司 | Method for detecting process pipeline of natural gas station |
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| CN113639206B (en) * | 2020-05-11 | 2023-08-22 | 中国石油天然气股份有限公司 | Method for detecting process pipeline of natural gas station |
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