CN112856252A - Drainage pipeline water leakage detection method - Google Patents
Drainage pipeline water leakage detection method Download PDFInfo
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- CN112856252A CN112856252A CN202110213256.0A CN202110213256A CN112856252A CN 112856252 A CN112856252 A CN 112856252A CN 202110213256 A CN202110213256 A CN 202110213256A CN 112856252 A CN112856252 A CN 112856252A
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- Prior art keywords
- drainage pipeline
- water leakage
- electrode
- power supply
- potential difference
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims description 17
- 235000002639 sodium chloride Nutrition 0.000 claims description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000004044 response Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- -1 H + Chemical class 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010291 electrical method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a drainage pipeline water leakage detection method, which comprises the following steps: step S1: putting a positive power supply electrode and a negative power supply electrode into the drainage pipeline; step S2: a plurality of cables are arranged above the drainage pipeline at intervals along the direction parallel to the drainage pipeline, and a plurality of measuring electrodes are further arranged on each cable at intervals; step S3: supplying direct current to the drainage pipeline through the power supply positive electrode and the power supply negative electrode; step S4: measuring potential difference data of each measuring electrode; step S5: and drawing a two-dimensional potential difference contour map according to the potential difference data and the position coordinates of the measuring electrodes, and determining the position of a water leakage point of the drainage pipeline according to map characteristics of the two-dimensional potential difference contour map. The invention can meet the water leakage detection of the drainage pipeline in a full water state, has quick detection response and obvious effect, simultaneously reduces a large amount of pretreatment work such as pipeline plugging, dredging and the like, greatly reduces the operation cost, ensures the safety of a construction method, and meets the requirement of environmental protection.
Description
Technical Field
The invention relates to the technical field of water leakage detection, in particular to a water leakage detection method for a drainage pipeline.
Background
The damage and leakage of urban drainage pipelines can cause urban pollution and water and soil loss, thereby causing road collapse, reduction of sewage flow into a sewage treatment plant, substandard concentration, difficult treatment and the like.
For detecting whether the drainage pipeline leaks, detection modes in pipelines such as CCTV (pipeline closed circuit television), QV (pipeline periscope), pipeline sonar methods and the like are generally adopted in the industry. Wherein, CCTV detection requires that the water level in the drainage pipeline is not more than 20% of the diameter of the pipeline; QV detection requires that the water level in the pipe is not more than 50% of the pipe diameter, and the length of the pipe section is not more than 50 m; the sonar detection can finish the detection under the state that the pipeline is full of water, but can only detect the defects of pipeline deformation, siltation and the like, and can not effectively eliminate the defect of pipeline water leakage.
This presents difficulties in maintaining the plumbing lines as they are typically buried underground. Due to the influences of factors such as insufficient drainage capacity of pipeline design, clogging of pipelines, backflow of river water and the like, a large number of urban drainage pipe networks are in a water-volume-full state for a long time, flow guide is not easy to block, and water leakage detection work of drainage pipelines is greatly restricted. Therefore, an effective method for detecting water leakage defects of urban full water drainage pipelines is urgently needed.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a drainage pipeline water leakage detection method, which can solve the technical problems.
(II) technical scheme
In order to solve the technical problems, the invention provides the following technical scheme: a drainage pipeline water leakage detection method comprises the following steps:
step S1: putting a positive power supply electrode and a negative power supply electrode into the drainage pipeline;
step S2: a plurality of cables are arranged above the drainage pipeline at intervals along the direction parallel to the drainage pipeline, and a plurality of measuring electrodes are further arranged on each cable at intervals;
step S3: supplying direct current to the drainage pipeline through the power supply positive electrode and the power supply negative electrode;
step S4: measuring potential difference data of each measuring electrode;
step S5: and drawing a two-dimensional potential difference contour map according to the potential difference data and the position coordinates of the measuring electrodes, and determining the position of a water leakage point of the drainage pipeline according to map characteristics of the two-dimensional potential difference contour map.
Preferably, step S1 is to place the positive power supply electrode and the negative power supply electrode in two drainage wells of the drainage pipeline respectively.
Preferably, the number of the cable lines is 3-5.
Preferably, the plurality of cable lines in step S2 are arranged at equal intervals.
Preferably, the wire spacing between adjacent cable wires is 40 cm.
Preferably, the plurality of measuring electrodes on the cable are arranged at equal intervals.
Preferably, the point distance between adjacent measuring electrodes is 40 cm.
Preferably, step S4 is to measure the potential difference data of each measuring electrode, in particular by an electrode converter.
Preferably, step S1 further comprises adding common salt into the drain pipeline.
(III) advantageous effects
Compared with the prior art, the invention provides a drainage pipeline water leakage detection method, which has the following beneficial effects: the invention can meet the water leakage detection of the drainage pipeline in a full water state, has quick detection response and obvious effect, simultaneously reduces a large amount of pretreatment works such as pipeline plugging, dredging and the like, greatly reduces the operation cost, ensures the safety of a construction method, and meets the requirement of environmental protection.
Drawings
FIG. 1 is a flow chart showing the steps of a method for detecting water leakage in a drainage pipeline according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The drainage pipeline water leakage detection method comprises the following steps:
step S1: and a positive power supply electrode and a negative power supply electrode are placed in the drainage pipeline.
Preferably, step S1 is to place the positive power supply electrode and the negative power supply electrode in two drainage wells of the drainage pipeline respectively.
Step S2: and a plurality of cables are arranged above the drainage pipeline at intervals along the direction parallel to the drainage pipeline, and a plurality of measuring electrodes are further arranged on each cable at intervals.
The cable wires are used as electrical measuring wires, and preferably, the number of the cable wires is 3-5. In the step S2, the cables are preferably arranged at equal intervals, the distance between adjacent cables may be 40cm, and the distance between adjacent cables may be adjusted to other values according to the pipe diameter of the drainage pipeline, which is not limited herein.
The plurality of measuring electrodes on the cable are preferably arranged at equal intervals; the point distance between the adjacent measuring electrodes can be 40cm, and of course, the point distance between the adjacent measuring electrodes can be adjusted to other values according to the pipeline buried depth of the drainage pipeline, and the point distance is not limited too much here.
In addition, the electrodes are preferably located in the underground medium and have the same length, for example, when the drainage pipeline is located in water, the electrodes are preferably submerged in the water.
Step S3: and supplying direct current to the drainage pipeline through the positive power supply electrode and the negative power supply electrode.
The step S3 is connected to a power supply, and supplies dc power to the drain line through the positive power supply electrode and the negative power supply electrode.
Step S4: potential difference data of the respective measuring electrodes are measured.
The drainage pipeline is electrified with direct current, because sewage in the drainage pipeline contains a large amount of electrolytes such as nitrate, nitrite and phosphate, positive ions such as H +, NH4+ and the like are generated after water is electrolyzed, negative ions such as OH-, N3-, S2-and P3-and the like are generated after water is electrolyzed, when a certain point of the drainage pipeline is broken and leaked, water seeps out from the leakage point, and current in the drainage pipeline along water flow passes through the leakage point to form a point current source underground. The potential difference is the potential difference between different measuring electrodes, and the rolling measurement of the potential difference of the underground medium above the drainage pipeline is realized by measuring the potential difference data of each measuring electrode.
In step S4, the electrical method main unit is connected to the electrode converter, the electromechanical converter is connected to each measuring electrode, and the potential difference data of each measuring electrode is measured by the electrode converter.
Step S5: and drawing a two-dimensional potential difference contour map according to the potential difference data and the position coordinates of the measuring electrodes, and determining the position of a water leakage point of the drainage pipeline according to map characteristics of the two-dimensional potential difference contour map.
In the two-dimensional potential difference contour map, the water leakage point has obvious abnormality, and the abnormality characteristic is the map characteristic of 'positive and negative satellites', namely the position of the water leakage point corresponds to the position where the contour line in the two-dimensional potential difference contour map is most dense, namely the position where the potential difference value changes in the maximum value.
According to the invention, direct current is supplied to the drainage pipeline, a plurality of cables are arranged in parallel above the drainage pipeline, and a plurality of measuring electrodes are arranged on the cables, so that potential difference data of each measuring electrode is measured, that is, the potential difference change characteristic of an underground medium where the drainage pipeline is located is detected above the drainage pipeline, and the position of a water leakage point of the drainage pipeline can be further determined.
In other embodiments, step S1 may further include adding salt (NaCl) into the drain pipe, so that the salt is added to increase electrolytes in the drain pipe, and accordingly increase charged ions, so that the electrical anomaly of the potential difference is more significant, thereby facilitating determination of the position of the water leakage point.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A drainage pipeline water leakage detection method is characterized by comprising the following steps:
step S1: putting a positive power supply electrode and a negative power supply electrode into the drainage pipeline;
step S2: a plurality of cables are arranged above the drainage pipeline at intervals along the direction parallel to the drainage pipeline, and a plurality of measuring electrodes are further arranged on each cable at intervals;
step S3: supplying direct current to the drainage pipeline through the power supply positive electrode and the power supply negative electrode;
step S4: measuring potential difference data of each measuring electrode;
step S5: and drawing a two-dimensional potential difference contour map according to the potential difference data and the position coordinates of the measuring electrodes, and determining the position of the water leakage point of the drainage pipeline according to the map characteristics of the two-dimensional potential difference contour map.
2. The method for detecting water leakage in a drainage pipeline according to claim 1, wherein: in step S1, a positive power supply electrode and a negative power supply electrode are respectively placed in two sections of drainage wells of the drainage pipeline.
3. The method for detecting water leakage in a drainage pipeline according to claim 1, wherein: the number of the cables is 3-5.
4. The method for detecting water leakage in a drainage pipeline according to claim 1, wherein: in the step S2, the cables are arranged at equal intervals.
5. The method for detecting water leakage in a drainage pipeline according to claim 4, wherein: and the distance between adjacent cable wires is 40 cm.
6. The method for detecting water leakage in a drainage pipeline according to claim 1, wherein: the plurality of measuring electrodes on the cable line are arranged at equal intervals.
7. The method for detecting water leakage in a drainage pipeline according to claim 6, wherein: the point distance between adjacent measuring electrodes is 40 cm.
8. The method for detecting water leakage in a drainage pipeline according to claim 1, wherein: the step S4 is to measure the potential difference data of each measuring electrode through an electrode converter.
9. The method for detecting water leakage in a drainage pipeline according to claim 1, wherein: the step S1 further comprises adding common salt into the drainage pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110213256.0A CN112856252A (en) | 2021-02-25 | 2021-02-25 | Drainage pipeline water leakage detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110213256.0A CN112856252A (en) | 2021-02-25 | 2021-02-25 | Drainage pipeline water leakage detection method |
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| CN112856252A true CN112856252A (en) | 2021-05-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112253A (en) * | 2021-11-23 | 2022-03-01 | 东华理工大学 | CEE underground enclosure structure leakage detection method and detection device |
| CN116735103A (en) * | 2023-08-15 | 2023-09-12 | 广东绘宇智能勘测科技有限公司 | Water supply pipe leakage detection method and system |
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| CN110632131A (en) * | 2019-10-16 | 2019-12-31 | 黄河勘测规划设计研究院有限公司 | Method for monitoring leakage of channel embankment project |
| CN112345173A (en) * | 2020-09-30 | 2021-02-09 | 广东绘宇智能勘测科技有限公司 | Drain pipe leakage electrical property detection method |
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2021
- 2021-02-25 CN CN202110213256.0A patent/CN112856252A/en active Pending
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| CN110632131A (en) * | 2019-10-16 | 2019-12-31 | 黄河勘测规划设计研究院有限公司 | Method for monitoring leakage of channel embankment project |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112253A (en) * | 2021-11-23 | 2022-03-01 | 东华理工大学 | CEE underground enclosure structure leakage detection method and detection device |
| CN116735103A (en) * | 2023-08-15 | 2023-09-12 | 广东绘宇智能勘测科技有限公司 | Water supply pipe leakage detection method and system |
| CN116735103B (en) * | 2023-08-15 | 2023-11-03 | 广东绘宇智能勘测科技有限公司 | Water supply pipe leakage detection method and system |
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Application publication date: 20210528 |