CN107727970A - A kind of detection method and system of buried steel pipe exchange drain means - Google Patents
A kind of detection method and system of buried steel pipe exchange drain means Download PDFInfo
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- CN107727970A CN107727970A CN201711026470.5A CN201711026470A CN107727970A CN 107727970 A CN107727970 A CN 107727970A CN 201711026470 A CN201711026470 A CN 201711026470A CN 107727970 A CN107727970 A CN 107727970A
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- steel pipe
- buried steel
- test point
- test
- drain means
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 81
- 239000010959 steel Substances 0.000 title claims abstract description 81
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 126
- 230000000694 effects Effects 0.000 claims abstract description 17
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention relates to a kind of detection method and system of buried steel pipe exchange drain means working condition, detection method comprises the following steps：A, DM test systems arrangement is arranged near buried steel pipe (3) the exchange drain means (2) for being preset with drainage test pile (8)；B, the switch of DM system transmitters (4) is opened, ac signal directly or indirectly is applied to buried steel pipe (3)；C, DM system receivers (5) AC current values in the first test point (6) and the second test point (7) measure buried steel pipe (3) respectively are utilized；D, the AC current values of the first test point (6) and the second test point (7) are compared.The present invention is easy to use, can detect whether pipeline alternative stray current drain means have good row's communicative effect when AC influence source does not occur.
Description
Technical field
It is more particularly to a kind of to disturb the invention belongs to buried steel pipeline alternative stray current drain means detection field
When source does not occur alternative stray current drain means whether the detection method and system of normal work.
Background technology
With the construction of national economy, buried steel pipeline intersects with attached wires of AC electrified railway and high-voltage line, can not with row
Avoid, and it is more and more, alternative stray current interference problem is increasingly severe, spuious in order to solve the exchange of buried steel pipe
Current interference problem, management unit's alternative stray current stream discharging system to Pipe installing.
GB/T 19285-2014《Buried steel pipe corrosion protection works are examined》In inspection provision on drain means
It is 6.4.10 as follows：The installation site and installation requirement of drain means should meet design requirement, and the inspection of earthing pole grounding resistance should
Approved by reviewer.It is not known in the standard and arranges specific parameter.
GB/T 50698-2011《Buried steel pipe AC influence guard technology standard》In on drainage protection effect
Provide 6.2.2 regulations：It is not more than 25 Ω m place in soil resistivity, pipeline AC influence voltage is less than 4V；In soil electricity
Resistance rate is more than 25 Ω m place, and AC current density is less than 60A/m2.Although clearly arrange in the standard after implementing protection
The parameter that should reach, but when not about being scheduled on interference source and being not present, the whether effective method of inspection of stream discharging system.
In April, 2012《Pipe technology and equipment》The 40-42 pages of periodical, Teng Yan equalitys are delivered《Stray current drainage is set
Apply efficiency evaluation research》, it only analyzes the advantages of three classes often use drainage facility and limitation, does not propose that drain means are effective
The evaluation method of property.
For the long-term and relative AC influence being stabilized, the validity of its drain means can pass through GB/T 50698-
Method is assessed specified in 2011；Cause for alternating voltage (such as attached wires of AC electrified railway) existing for long-term and periodicity
AC influence, equally can by specified in GB/T50698-2011 method carry out long period (24h) monitoring, specify drainage dress
The validity put.But in the case of no long-standing AC influence, according to existing standard and measuring means, row
The validity of stream device is difficult to assess.Such as：(1) moment high induction voltage caused by strong fault have to buried steel pipe compared with
Big AC influence harm, but strong fault has Unpredictability, friendship of the moment to drain means can not occur in failure
Stream drainage effect is assessed；(2) attached wires of AC electrified railway Construction Party asks for the assessment of Along Railway pipe-line construction drain means
Topic：Need long period railway just to put into operation after the completion of drain means construction, stray electrical is exchanged after railway puts into operation
Interference source is flowed just to occur, and before interference source appearance, the validity of drain means is difficult to assess, and causes the drainage project can not
Check and accept.
The content of the invention
For above-mentioned technical problem, situation be present in no actual AC influence source it is an object of the invention to provide one kind
Under, to the detection method of buried steel pipeline alternative stray current drain means working condition, the exchange drainage to drain means
Effect is assessed.
It is a further object to provide a kind of detecting system of buried steel pipe exchange drain means.
To achieve these goals, the invention provides following technical scheme：
The present invention provides a kind of detection method of buried steel pipe exchange drain means working condition, the detection method bag
Include following steps：
A, DM test systems arrangement is exchanged into drain means 2 installed in the buried steel pipe 3 for being preset with drainage test pile 8
Near；
The DM test systems include DM system transmitters 4 and DM system receivers 5；One termination of DM system transmitters 4
Earth polar, the other end are electrically connected by direct or indirect mode with buried steel pipe 3；
Respectively buried steel pipe 3 be arranged above the first test point 6 and the second test point 7 is tested；It is described
First test point 6 is between DM system transmitters 4 and drainage test pile 8；Drainage test pile 8 is located at the first test point 6 and
Between two test points 7；
B, the switch of DM system transmitters 4 is opened, ac signal is applied to buried steel pipe 3；
C, using DM system receivers 5 respectively in the first test point 6 and the second test point 7 measure buried steel pipe 3
AC current values；
D, the AC current values of the first test point 6 and the second test point 7 are compared, if the alternating current of the first test point 6
Value then judges that drain means 2 have good exchange drainage effect more than more than 5 times of the AC current values of the second test point 7；
If the AC current values of the first test point 6 are less than the AC current values of the second test point 7, the exchange of drain means 2 is judged
Drainage effect is poor；If the AC current values of the first test point 6 are 1-5 times of the AC current values of the second test point 7, Ying Shi
After border interference source occurs, drainage effect is assessed again according to corresponding national standard.
The DM system transmitters 4 are protected test pile 1 by the moon and electrically connected with buried steel pipe 3.
The DM system transmitters 4 with facility in the well of valve well 9 with buried steel pipe 3 by electrically connecting.
The DM system transmitters 4 are electrically connected by excavating pipeline body of the test pit 10 directly with buried steel pipe 3.
The distance between the test point 7 of first test point 6 and second and drainage test pile 8 are 10m-20m.
The present invention provides a kind of detection system for the detection method for implementing buried steel pipe exchange drain means working condition
System, the detecting system include：
(1) drainage test pile 8：Be preset near the exchange drain means 2 of buried steel pipe 3, and with buried steel pipe
Road 3 electrically connects with drain means 2 are exchanged；
(2) DM test systems：Including DM system transmitters 4 and DM system receivers 5；Wherein：
DM system transmitters 4 are arranged on away from the position directly over the certain distance of drainage test pile 8, buried steel pipe 3, DM
One end earthing pole of system transmitter 4, the other end are electrically connected using direct or indirect connected mode with buried steel pipe 3；
The DM system transmitters 4 controllably directly or indirectly apply ac signal to buried steel pipe 3；
The alternating current in the first test point 6 and the second test point 7 measure buried steel pipe 3 respectively of DM system receivers 5
Flow valuve；
(3) first test points 6 and the second test point 7：It is separately positioned on the surface of buried steel pipe 3；Described first
Test point 6 is between DM system transmitters 4 and drainage test pile 8；Drainage test pile 8 is surveyed positioned at the first test point 6 and second
Between pilot 7.
The DM system transmitters 4 are protected test pile 1 by the moon and electrically connected with buried steel pipe 3.
The DM system transmitters 4 with facility in the well of valve well 9 with buried steel pipe 3 by electrically connecting.
Pipeline body of the DM system transmitters 4 directly with buried steel pipe 3 electrically connects.
The distance between the test point 7 of first test point 6 and second and drainage test pile 8 are 10m-20m.
Compared with prior art, the beneficial effects of the present invention are：
The detection method of the present invention, in the case of not occurring in AC influence source, detected using buried steel pipe conventional
DM detecting systems emitter for pipeline introduce AC influence signal, using DM system receivers examine drain means before and after bury
AC current values in ground steel pipe, and by contrasting the AC current values before and after drain means in buried steel pipe, i.e.,
The exchange drainage effect to drain means can be achieved to assess.
Brief description of the drawings
Fig. 1 is that the detection method of the buried steel pipe exchange drain means working condition of the present invention protects test pile using cloudy
The schematic diagram measured；
The buried steel pipe that Fig. 2 is the present invention exchanges the detection method of drain means working condition using being set in valve well
Apply the schematic diagram measured；
Fig. 3 is utilized for the detection method of the buried steel pipe exchange drain means working condition of the present invention and is excavated test pit side
The schematic diagram that formula measures.
Reference therein is：
1 cloudy guarantor's test pile
2 drain means
3 buried steel pipes
4 DM system transmitters
5 DM system receivers
6 first test points
7 second test points
8 drainage test piles
9 valve wells
10 excavate test pit
Embodiment
The present invention is further described with reference to embodiment.
As shown in figure 1, a kind of detection method of buried steel pipe exchange drain means working condition, in AC influence source
In the case of not occurring, you can the exchange drainage effect to buried steel pipe drain means is evaluated；Tested entirely
Cheng Zhong, in addition to DM test systems, exchange drainage effect that can be to drain means without other equipment is evaluated.
DM test systems are to detect common equipment outside steel buried pipeline, are generally used for pipeline rout positioning and buried depth is surveyed
Amount, pipeline anticorrosion coating grading and the detection of pipeline anticorrosion coating breaking point.DM test systems mainly by emitter, receiver and
A type frame forms.The system applies AC signal by emitter to pipeline, and receiver test pipeline can be used above pipeline
AC current values in position, buried depth and pipeline.
The detection method comprises the following steps：
(1) DM test systems arrangement is exchanged into drain means installed in the buried steel pipe 3 for being preset with drainage test pile 8
Near 2；
The DM test systems include DM system transmitters 4 and DM system receivers 5；One termination of DM system transmitters 4
Earth polar, the other end are electrically connected by direct or indirect mode with buried steel pipe 3；
Respectively buried steel pipe 3 be arranged above the first test point 6 and the second test point 7 is tested；It is described
First test point 6 is between DM system transmitters 4 and drainage test pile 8；Drainage test pile 8 is located at the first test point 6 and
Between two test points 7；
(2) switch of DM system transmitters 4 is opened, ac signal is applied to buried steel pipe 3；
(3) utilize DM system receivers 5 respectively in the first test point 6 and the second test point 7 measure buried steel pipe 3
AC current values；
(4) AC current values of the first test point 6 and the second test point 7 are compared, if the alternating current of the first test point 6
Value then judges that drain means 2 have good exchange drainage effect more than more than 5 times of the AC current values of the second test point 7；
If the AC current values of the first test point 6 are less than the AC current values of the second test point 7, the exchange of drain means 2 is judged
Drainage effect is poor；If the AC current values of the first test point 6 are 1-5 times of the AC current values of the second test point 7, Ying Shi
After border interference source occurs, drainage effect is assessed again according to corresponding national standard.
As a kind of indirect connections, the DM system transmitters 4 protect test pile 1 and buried steel pipe 3 by the moon
Electrical connection, as shown in Figure 1.
As shown in Fig. 2 if buried steel pipe 3 is not provided with cloudy guarantor's test pile 1, the moon protects test pile 1 in the present invention
In effect, can be set by directly or indirectly basseting in the well for the valve well 9 for keeping electrically connecting with buried steel pipe 3
(such as valve, solidifying cylinder) is applied to substitute.
If as shown in figure 3, buried steel pipe 3 be not provided with it is cloudy protect test pile 1, and without directly or indirectly basseting
, the facility electrically connected with the holding of buried steel pipe 3, buried steel pipe 3 can be carried out in the range of away from drain means 1km
Pipeline body of the DM system transmitters 4 directly with buried steel pipe 3 is electrically connected by local excavation's test pit 10 to pipeline body is exposed
Connect.
The newly-built high ferro through section of embodiment city natural gas line
DM system transmitters 4 are placed at test pile 1 in cloudy protect near drain means 2, ground connection is used as by the use of drill rod
Pole, apply 1A ac signal to buried steel pipe 3 by the cloudy p-wire protected in test pile 1.Tested apart from drainage
It is 610mA that the first test point 6, which measures alternating current in pipeline, directly over pipeline of the stake 1 about at 20m, apart from drainage test pile 8
It is 25mA that the second test point 7, which measures alternating current in pipeline, directly over pipeline about at 20m.It can be drawn by calculating, about 575mA
Alternating current flowed into by drain means in the earth, it is possible thereby to judge that drain means work is good.
Claims (10)
- A kind of 1. detection method of buried steel pipe exchange drain means working condition, it is characterised in that：The detection method comprises the following steps：DM test systems arrangement is arranged on to buried steel pipe (3) the exchange drain means (2) for being preset with drainage test pile 8 a, Near；The DM test systems include DM system transmitters (4) and DM system receivers (5)；One end of DM system transmitters (4) Earthing pole, the other end are electrically connected by direct or indirect mode with buried steel pipe (3)；Respectively buried steel pipe (3) be arranged above the first test point (6) and the second test point (7) is tested；Institute The first test point (6) is stated to be located between DM system transmitters (4) and drainage test pile (8)；Drainage test pile (8) is surveyed positioned at first Between pilot (6) and the second test point (7)；B, the switch of DM system transmitters (4) is opened, ac signal is applied to buried steel pipe (3)；C, buried steel pipe is measured in the first test point (6) and the second test point (7) respectively using DM system receivers (5) (3) AC current values in；D, the AC current values of the first test point (6) and the second test point (7) are compared, if the alternating current of the first test point (6) Flow valuve is more than more than (5) times of the AC current values of second test point (7), then judges that drain means (2) have good exchange Drainage effect；If the AC current values of the first test point 6 are less than the AC current values of the second test point 7, drainage dress is judged The exchange drainage effect for putting (2) is poor；If the AC current values of the first test point (6) are the alternating current of the second test point (7) 1-5 times of value, after should occurring in actual interference source, drainage effect is assessed again according to corresponding national standard.
- 2. the detection method of buried steel pipe exchange drain means working condition according to claim 1, its feature exist In：The DM system transmitters (4) are protected test pile (1) by the moon and electrically connected with buried steel pipe (3).
- 3. the detection method of buried steel pipe exchange drain means working condition according to claim 1, its feature exist In：The DM system transmitters (4) with facility in the well of valve well (9) with buried steel pipe (3) by electrically connecting.
- 4. the detection method of buried steel pipe exchange drain means working condition according to claim 1, its feature exist In：The DM system transmitters (4) are electrically connected by excavating pipeline body of the test pit (10) directly with buried steel pipe (3).
- 5. the detection method of buried steel pipe exchange drain means working condition according to claim 1, its feature exist In：First test point (6) and the distance between the second test point (7) and drainage test pile (8) are 10m-20m.
- A kind of 6. detection of the detection method for the buried steel pipe exchange drain means working condition implemented described in claim 1 System, it is characterised in that：The detecting system includes：(1) drainage test pile (8)：Be preset near the exchange drain means (2) of buried steel pipe (3), and with buried steel Pipeline (3) electrically connects with drain means (2) are exchanged；(2) DM test systems：Including DM system transmitters (4) and DM system receivers (5)；Wherein：DM system transmitters (4) are arranged on away from the position directly over drainage test pile (8) certain distance, buried steel pipe (3), One end earthing pole of DM system transmitters (4), the other end is using direct or indirect connected mode and buried steel pipe (3) electricity Connection；The DM system transmitters (4) controllably directly or indirectly apply ac signal to buried steel pipe (3)；DM system receivers (5) are handed in the first test point (6) and the second test point (7) measure buried steel pipe (3) respectively Flow current value；(3) first test points (6) and the second test point (7)：It is separately positioned on the surface of buried steel pipe (3)；Described One test point (6) is located between DM system transmitters (4) and drainage test pile (8)；Drainage test pile (8) is located at the first test point (6) between the second test point (7).
- 7. detecting system according to claim 6, it is characterised in that：The DM system transmitters (4) are protected by the moon and tested Stake (1) electrically connects with buried steel pipe (3).
- 8. detecting system according to claim 6, it is characterised in that：The DM system transmitters (4) by with valve well (9) facility electrically connects with buried steel pipe (3) in well.
- 9. detecting system according to claim 6, it is characterised in that：The DM system transmitters (4) directly with buried steel The pipeline body electrical connection of tubing giving sufficient strength (3).
- 10. detection means according to claim 6, it is characterised in that：First test point (6) and the second test point (7) it is 10m-20m with the distance between drainage test pile (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711026470.5A CN107727970B (en) | 2017-10-27 | 2017-10-27 | Detection method and system for alternating current drainage device of buried steel pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711026470.5A CN107727970B (en) | 2017-10-27 | 2017-10-27 | Detection method and system for alternating current drainage device of buried steel pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107727970A true CN107727970A (en) | 2018-02-23 |
| CN107727970B CN107727970B (en) | 2024-02-06 |
Family
ID=61201931
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711026470.5A Active CN107727970B (en) | 2017-10-27 | 2017-10-27 | Detection method and system for alternating current drainage device of buried steel pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375015A (en) * | 2018-10-30 | 2019-02-22 | 广州发展集团股份有限公司 | Drainage detection device and distance transmission system |
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| CN107727970B (en) | 2024-02-06 |
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