CN206338592U - A kind of device for being used to detect the outer wall anticorrosive coat breaking point of super buried depth underground piping - Google Patents
A kind of device for being used to detect the outer wall anticorrosive coat breaking point of super buried depth underground piping Download PDFInfo
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- CN206338592U CN206338592U CN201621416428.5U CN201621416428U CN206338592U CN 206338592 U CN206338592 U CN 206338592U CN 201621416428 U CN201621416428 U CN 201621416428U CN 206338592 U CN206338592 U CN 206338592U
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Abstract
The utility model is related to a kind of device for being used to detect the outer wall anticorrosive coat breaking point of super buried depth underground piping, including transmitter, and it is electrically connected to buried pipe road；Two rapiers, each rapier has an elongated, hollow main body, and one end of main body has a probe and the other end has connector is provided with lever, lever, and metal probe is electrically connected by the wire being arranged in main body with connector；Detector, including power subsystem, input protection location, gain adjustment unit, magnification processing, noise reduction filtering unit, single-chip microcomputer processing unit and display unit；The input of wherein input protection location is electrically connected with the connector of rapier, and the output end of input protection location, gain adjustment unit, magnification processing, noise reduction filtering unit, single-chip microcomputer processing unit, display unit are sequentially connected electrically.Device of the present utility model can quickly and accurately determine the position of anticorrosive coat breaking point.
Description
Technical field
The utility model belongs to underground piping Detection Techniques field, and in particular to one kind is used to detect super buried depth underground piping
Outer wall anticorrosive coat breaking point device.
Background technology
With China's oil chemical industry develop rapidly and urban public utilities construction speed raising, underground metal pipes
Build also in development at full speed.But meanwhile, underground metal pipes are also often subject to the corrosion of various harmful substances, the corrosion of pipeline
The problem of bringing huge economic loss and social safety to bring to the mankind and social environment becomes increasingly conspicuous.Therefore, for conveying
Respectively it is required to be protected with the steel pipe of medium, it is to avoid various corrosion factors in soil, compound ions, bacterium, be conducive to electricity
The corrosion of the various conditions or stray electrical current that road passes through pipeline etc..In actual applications, the additional anticorrosive coat protection of steel pipe
It is most common method.Protective conduit outer wall exempts from the electrochemical corrosion of soil media, the purpose of bacterial corrosion.Buried pipeline is prevented
Rotten layer causes deterioration due to factors, aging, embrittlement occurs, peels off, comes off, ultimately resulting in Metal pipeline corrosion perforation, draws
Play leakage.Anticorrosive coat deterioration similarly influences cathodic protection efficiency, because after anticorrosive coat deterioration, metallic conduit and the earth are without cease
Edge, protective current scatters and disappears, and guard space will shorten, and the pipeline that causing to protect is corroded.Therefore, it is anti-to underground piping
Rotten layer status periodical evaluation, and planned progress leak detection and mending-leakage are to prevent and avoid triggering pipeline corruption because anticorrosive coat is deteriorated
The important means of erosion, is exactly both at home and abroad human body using more method in conventional buried depth pipeline anticorrosion coating detection field in recent years
The method such as capacitance method, ACVG, DCVG, achieves preferable effect.But developing rapidly with no-dig technique Directional Drilling Technology, mesh
The underground utilities of preceding use Directional Drilling construction are more and more, and buried depth is also increasingly deeper, river crossing, the pipeline of highway
Now with buried depth met or exceeded 30 meters, so deep pipeline external anti-corrosion layer detection above method Detection results are not
It is preferable.
Utility model content
The purpose of this utility model is to provide a kind of outer wall anticorrosive coat breaking point for being used to detect super buried depth underground piping
Device.
What the utility model was provided is used to detect that the device of the outer wall anticorrosive coat breaking point of super buried depth underground piping to include hair
Emitter, it is electrically connected to the underground piping；Two rapiers, each rapier has elongated, hollow main body, the main body
One end there is probe and the other end has connector is provided with lever, the lever, the probe is described by being arranged on
Wire in main body is electrically connected with the connector；Detector, including power subsystem, input protection location, gain adjustment unit,
Magnification processing, noise reduction filtering unit, single-chip microcomputer processing unit and display unit；It is wherein described to input the defeated of protection location
Enter end to electrically connect with the connector of the rapier, the output end of the input protection location, the gain adjustment unit, institute
Magnification processing, the noise reduction filtering unit, the single-chip microcomputer processing unit, the display unit is stated to be sequentially connected electrically；Its
Middle single-chip microcomputer processing unit is based on phase-comparison circuit.
In the utility model, it is in frequency multiplication relation that transmitter, which is used to apply one group of high-frequency and two groups simultaneously to pipe under test,
Low-frequency hybrid frequency AC signal, a variety of transmitters commonly used in the art can be used.
In the utility model, high-frequency is often referred to the frequency not less than 128Hz, such as 128Hz, 512Hz, 1024Hz,
The one group of high-frequency applied is generally used for determining stationary singnal determining suitable detection interval etc..
In the utility model, two groups of low frequencies in frequency multiplication relation of application are used to determine based on phase-comparison circuit
The sense of current.In the utility model, usual high-frequency is low-frequency 10-300 times.It is exemplary in the utility model
Two groups can be 4Hz+8Hz, 3Hz+6Hz, 5Hz+10Hz etc. in the low frequency of frequency multiplication relation.
In the utility model, detector is used to detect the potential difference between two probes, is represented by dB values.
Stationary singnal is often referred to potential difference less than 50mV.
The high-frequency of application and low-frequency size can be selected according to field condition.
Selectively, the frequency signal of application can be the waveform signals such as sine wave, square wave, sawtooth waveforms.
The frequency size of application is little with testing result relation, simply different live geographical environments, the difficulty that signal applies
Easy degree is different, and signal transmission distance is also different.
Alternatively, probe is needle-like.
Alternatively, probe is metal probe.
Alternatively, the other end of main body has screw thread, so as to be threadedly coupled with the lever.Alternatively, main body with
Probe becomes one.
Alternatively, power subsystem provides electric power for other each units in device of the present utility model；Input protection location
For carrying out voltage-limiting protection to the current signal collected；The gain adjustment unit is used to believe the electric current after voltage-limiting protection
Number carry out gain-adjusted；The magnification processing is used to be amplified processing to the current signal after gain-adjusted；The drop
Filter unit of making an uproar is used to carry out noise reduction and filtering process to the signal after amplification.
Alternatively, display unit includes sense of current direction display unit and signal magnitude display unit.Alternatively, two
Unit is liquid crystal display or light emitting diode.
Alternatively, the unit of display is individual unit, and the sense of current and signal magnitude can be shown simultaneously.
The utility model is particularly suitable for use in buried depth and detected in the anti-corrosion of 10-40 meters or so of pipeline.
The work of device of the present utility model and use principle are summarized as follows：
Single-chip microcomputer processing unit be based on phase-comparison circuit, i.e., transmitter apply two groups in frequency multiplication relation (such as 4Hz and
8Hz；3Hz and 6Hz) frequency signal；Two groups of signals are amplified, after filtering, and wherein more low-frequency signal (such as 4Hz) is carried out
Frequency multiplication amplifies the signal for obtaining two frequencies identical (being such as 8Hz), is input to the phase that phase-comparison circuit recognizes respective signal
Position is simultaneously compared, if two signal phases are identical, display is indicated forward；If the phase difference of two signals
180 °, then display is indicated backward.
In use, transmitter applies the AC signal of one group of high-frequency and two groups of low-frequency hybrid frequencies, two rapiers
It is inserted into soil and gathers signal, signal after gain-adjusted, amplification, enters after input protection location carries out voltage-limiting protection
Row noise reduction and filtering process, after single-chip microcomputer processing unit processes, the level intensity and the sense of current of signal, i.e. potential difference
Shown in the display with arrow and dB values with the direction of anticorrosive coat breaking point.
" forward direction " arrow this show anticorrosive coat breaking point in the front of detection interval；" backward " arrow shows that anticorrosive coat is damaged
Point is at the rear of detection interval, it is possible thereby to determine the direction of anticorrosive coat breaking point.
Level intensity reflects how far of the detection interval apart from anticorrosive coat breaking point, and detection interval is broken apart from anticorrosive coat
Damage point is nearer, and level intensity is higher, conversely, detection interval is more remote apart from anticorrosive coat breaking point, and level intensity is lower.In anticorrosive coat
Breaking point both sides, sense of current contrast, therefore being accurately positioned for anticorrosive coat breaking point can be realized.
Compared with the prior art, the utility model has the advantage of：
1st, used device is simple to operate, strong antijamming capability, sensitivity and high precision, hardly by ground surface environment and
The influence of the humidity of soil.
2nd, the position of anticorrosive coat breaking point is quickly and accurately determined.
3rd, used measuring method and device, except the detection for being effectively applicable to super buried depth pipeline anticorrosion coating breaking point,
Suitable for conventional buried depth pipeline, the scope of application is wider.
Brief description of the drawings
The utility model is described further with reference to the accompanying drawings and examples.
Fig. 1 is test schematic diagram of the present utility model；
Fig. 2 is the rapier structural representation of the utility model device；
Fig. 3 is the electric functional-block diagram of the utility model detector.
In Fig. 1-3,1 it is Target pipe, 2 is anticorrosive coat breaking point, 3 is rapier, 4 is connection cable, 5 is detector；3-1
It is that main body, 3-3 are that wire, 3-4 are that lever, 3-5 are connector for probe, 3-2；5-1 is power subsystem, 5-2 input protection lists
Member, 5-3 gain adjustment units, 5-4 magnification processings, 5-5 noise reduction filterings unit, 5-6 single-chip microcomputer processing units, 5-7 electric currents
Direction direction display unit, 5-8 is signal magnitude display unit.
Embodiment
To make the purpose, technical scheme and advantage of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described corresponding accompanying drawing.Obviously, described embodiment is only the application one
Section Example, rather than whole embodiments.Based on the embodiment in the application, those skilled in the art are not making wound
The every other embodiment obtained under the premise of the property made work, belongs to the scope of the application protection.
Below with reference to the accompanying drawings 1-3 detects pipeline outer wall corrosion failure to be illustratively described using device of the present utility model
The method of point.
First with the cable line terminals drawn on the test pile of buried pipeline from pipeline body, transmitter is connected, to target
Pipeline applies two groups of ac signals of one group of high-frequency (such as 512Hz) and two groups of low frequencies (such as 4Hz+8Hz) simultaneously.
Two rapiers are used alone, and along along the duct orientation soil spaced apart being inserted into above pipeline and are connected to
Detector.Using the high-frequency signal of application, the spacing of two rapiers of regulation confirms stationary singnal size.When stationary singnal is stable
Afterwards, longitudinally detected by step pitch of the distance between now two rapiers along pipeline.
The sine wave signal of the low frequency (4Hz+8Hz) of application is amplified, after filtering, will more low-frequency signal (such as
The signal that frequency multiplication amplification obtains two frequencies identical (being such as 8Hz) 4Hz) is carried out, phase-comparison circuit identification is input to respective
The phase of signal is simultaneously compared, if two sine wave signal phases are identical, the electric current in display unit in display pipes
Forward, to be indicated by means of an arrow；If the phase of two sine wave signals differs 180 °, the electricity in display unit in display pipes
Flow backward, to be indicated by means of an arrow.The potential difference between two rapiers is also shown in the display unit of detector, unit is dB.
When arrow is longitudinally directed to front along pipeline, illustrate anticorrosive coat breaking point in the front of detection interval, when arrow edge
When pipeline is longitudinally directed to rear, illustrate anticorrosive coat breaking point at the rear of detection interval.
There is no the potential difference between the position of breaking point, two rapiers in pipeline anticorrosion coating, be kept substantially stationary singnal big
It is small constant, when the potential difference increase between two rapiers detected, illustrate that detection interval and the distance of anticorrosive coat breaking point exist
Reduce, i.e., detection interval is close to anticorrosive coat breaking point.
When being reduced to after the potential difference increase of two interpolars detected close to zero again, illustrate detection interval and anticorrosive coat
Breaking point is overlapped, i.e. the intermediate point of detection interval is exactly the position of anticorrosive coat breaking point.
Continue to detect forward from potential difference smallest point, potential difference is fallen back to close to quiet again after becoming one segment distance of big detection
State signal.When detecting anticorrosive coat breaking point again, the potential difference between two rapiers increases again.
Embodiments herein is the foregoing is only, the application is not limited to.For those skilled in the art
For, the application can have various modifications and variations.It is all any modifications made within spirit herein and principle, equivalent
Replace, improve etc., it should be included within the scope of claims hereof.
Claims (4)
1. a kind of device for being used to detect the outer wall anticorrosive coat breaking point of super buried depth underground piping, it is characterised in that including：
Transmitter, it is electrically connected to the underground piping；
Two rapiers, each rapier has elongated, hollow main body, and one end of the main body has probe and the other end connects
It is connected on lever, the lever and is provided with connector, the probe passes through the wire being arranged in the main body and the connection
Device is electrically connected；
Detector, including power subsystem, input protection location, gain adjustment unit, magnification processing, noise reduction filtering unit,
Single-chip microcomputer processing unit and display unit；
The input of wherein described input protection location is electrically connected with the connector of the rapier, the input protection location
Output end, the gain adjustment unit, the magnification processing, the noise reduction filtering unit, single-chip microcomputer processing it is single
First, described display unit is sequentially connected electrically；
Wherein described single-chip microcomputer processing unit is based on phase-comparison circuit.
2. device as claimed in claim 1, it is characterised in that the probe is needle-like.
3. device as claimed in claim 1, it is characterised in that the other end of the main body has screw thread, thus with institute
State lever threaded connection.
4. device as claimed in claim 1, it is characterised in that the display unit include sense of current direction display unit and
Signal magnitude display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621416428.5U CN206338592U (en) | 2016-12-22 | 2016-12-22 | A kind of device for being used to detect the outer wall anticorrosive coat breaking point of super buried depth underground piping |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621416428.5U CN206338592U (en) | 2016-12-22 | 2016-12-22 | A kind of device for being used to detect the outer wall anticorrosive coat breaking point of super buried depth underground piping |
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| CN206338592U true CN206338592U (en) | 2017-07-18 |
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| CN201621416428.5U Active CN206338592U (en) | 2016-12-22 | 2016-12-22 | A kind of device for being used to detect the outer wall anticorrosive coat breaking point of super buried depth underground piping |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641741A (en) * | 2016-12-22 | 2017-05-10 | 江苏晟尔检测仪器有限公司 | Device and method for detecting damaged point of outer wall corrosion-resistant layer of extra-buried deep pipeline |
| CN109654379A (en) * | 2019-01-18 | 2019-04-19 | 陕西泰诺特检测技术有限公司 | A kind of non-metallic pipe pipeline external anticorrosive coating breakage detection system and application method |
-
2016
- 2016-12-22 CN CN201621416428.5U patent/CN206338592U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641741A (en) * | 2016-12-22 | 2017-05-10 | 江苏晟尔检测仪器有限公司 | Device and method for detecting damaged point of outer wall corrosion-resistant layer of extra-buried deep pipeline |
| CN106641741B (en) * | 2016-12-22 | 2018-12-07 | 江苏晟尔检测仪器有限公司 | A kind of device and method of the breaking point of the outer wall erosion resistant coating of the super buried depth pipeline of detection |
| CN109654379A (en) * | 2019-01-18 | 2019-04-19 | 陕西泰诺特检测技术有限公司 | A kind of non-metallic pipe pipeline external anticorrosive coating breakage detection system and application method |
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