CN108315741A - A kind of pipe current detection device - Google Patents
A kind of pipe current detection device Download PDFInfo
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- CN108315741A CN108315741A CN201810128841.9A CN201810128841A CN108315741A CN 108315741 A CN108315741 A CN 108315741A CN 201810128841 A CN201810128841 A CN 201810128841A CN 108315741 A CN108315741 A CN 108315741A
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- current detection
- pipeline
- pipe
- current
- detection device
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/22—Monitoring arrangements therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
- C23F2213/32—Pipes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a kind of pipe current detection devices, the pipe current detection device inside pipeline for carrying out current detecting, the pipe current detection device includes drive module and current detection module, drive module is arranged to driving current detection module and advances in pipeline, so that the contact range of current detection module and inner wall of the pipe changes；Current detection module is arranged to detect electric current of the pipeline in contact range.By being arranged the pipe current detection device of the present invention inside pipeline, advance from the inside of pipeline to carry out current detecting, this not limited the detection of the cathodic protection current of pipeline by external geographical conditions.Moreover, the applicability of the pipe current detection device is good.
Description
Technical field
The present invention relates to pipe current detection technique fields, more particularly it relates to which a kind of be arranged inside pipeline
The pipe current detection device being detected.
Background technology
Cathode protection technology is one kind of electrochemical protection technology, and principle is applied to the metallic structures surface that is corroded
One impressed current becomes cathode by protection works, so that the electron transfer that metal erosion occurs is inhibited, avoids
Or weaken the generation of corrosion.The generation of storage and transportation pipeline electrochemical corrosion in order to prevent, generally use sacrificial anode or outer power-up
The method of the cathodic protections such as stream is protected.As shown in Figure 1, in the cathodic protection system course of work, can be formed on tube wall cloudy
Pole protective current.Cathodic protection current flow direction protection anode 3 on pipeline 2, then by protection anode 3 pipeline is flow to via soil etc.
2, with forming circuit.The detection method of existing pipeline cathode protection electric current includes mainly close spacing potentiometry (CIPS), direct current
The outer detection methods such as electric potential gradient method (DCVG).
These detection methods are detected on the outside of pipeline.However, mountain pipeline, submarine pipeline and great burying
Or the personnel such as directional drilling crossing section can not reach or outer detection device can not detect pipeline section, it is difficult to implement outer detection.
In addition, near electric wire, railway and other cathodic protection facilities, outer detection can not avoid external disturbance, and
Judge stray electrical current etc..
In addition, outer detection method needs to detect the resistance drop of soil, detection process can interfere cathodic protection system just
Often work.
Invention content
It is an object of the present invention to provide a kind of new technical solutions that one of can be solved the above problems.
According to the first aspect of the invention, a kind of pipe current detection device, the pipe current detection device are provided
For carrying out current detecting inside pipeline, the pipe current detection device includes drive module and current detection module, institute
It states drive module to be arranged to that the current detection module is driven to advance inside the pipeline, so that the current detection module
It changes with the contact range of inner wall of the pipe；The current detection module is arranged to detect the pipeline in the contact model
Enclose interior electric current.
Optionally, the current detection module includes processing unit, the first collecting unit and the second collecting unit；It is described
First collecting unit is arranged to acquire the current potential for the first position that itself is contacted with the inner wall of the pipe；Second acquisition is single
Member is arranged to acquire the current potential for the second position that itself is contacted with the inner wall of the pipe；Wherein, the first collecting unit phase
Make the first position and the second position that there is setpoint distance in duct orientation the setting of second collecting unit；
The processing unit is arranged to the current potential according to the first position, the current potential of the second position and pre-stored institute
Resistance of the pipeline in the setpoint distance is stated, determines electric current of the pipeline in the contact range.
Optionally, the processing unit include the first amplifying circuit, the second amplifying circuit, difference scaling circuit and
Counting circuit, first amplifying circuit, which is arranged to be amplified the current potential of the first position processing, obtains the first amplification
Current potential；Second amplifying circuit is arranged to be amplified the current potential of the second position processing and obtains the second amplification electricity
Position；The difference scaling circuit is arranged to carry out differential ratio to the first amplification current potential and the second amplification current potential
Example operation obtains amplification potential difference；The counting circuit is arranged to according to the amplification potential difference and pre-stored described
Resistance of the pipeline in the setpoint distance calculates electric current of the pipeline in the contact range of the pipeline；Wherein, institute
It is identical with the amplification factor of second amplifying circuit to state the first amplifying circuit.
Optionally, the current detection module further includes position acquisition unit, and the position acquisition unit is arranged to
Position of the current detection module in the pipeline is obtained, and is sent to the processing unit；The processing unit also by
It is set as the corresponding contact range of each electric current of the location determination obtained according to the position acquisition unit.
Optionally, the position acquisition module includes mileage wheel, and the mileage wheel is contacted with the inner wall of the pipeline, with
Obtain travel distance of the current detection module in the pipeline.
Optionally, the processing unit is identical with the sample frequency of the position acquisition unit.
Optionally, the drive module is arranged to the media drive by being flowed in the pipeline, to drive the electricity
Stream detection module is advanced along the flow direction of the medium in pipeline in the pipeline.
Optionally, the drive module is leather cup, and the intrados of the leather cup is pushed by the medium.
Optionally, the pipe current detection device further includes locating module, and the locating module is arranged to emit
Positioning signal positions the pipe current detection device for operating personnel according to the positioning signal.
Optionally, the pipe current detection device further includes power module, and the power module is arranged to institute
State current detection module power supply.
The advantageous effect of the present invention is, by being arranged the pipe current detection device of the present invention in pipeline
Portion advances from the inside of pipeline to carry out current detecting, this makes the detection to the cathodic protection current of pipeline not by externally
The limitation of manage bar part.Moreover, the applicability of the pipe current detection device is good.
In addition, the pipe current detection device can calculate the size of stray electrical current by difference operation, so that
More acurrate to the assessment of the cathodic protection of pipeline, accuracy of detection is high.
In addition, the pipe current detection device need not detect the resistance drop of soil, cathodic protection system will not be interfered
Normal work, realize on-line checking.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Description of the drawings
It is combined in the description and the attached drawing of a part for constitution instruction shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Schematic diagram when Fig. 1 is the use of pipe current detection device according to an embodiment of the invention；
Fig. 2 is the frame principle figure for implementing structure according to a kind of one of which of pipe current detection device of the present invention；
Fig. 3 is the frame principle figure for implementing structure according to a kind of one of which of pipe current detection device of the present invention；
Fig. 4 is the frame principle figure for implementing structure according to a kind of one of which of pipe current detection device of the present invention；
Fig. 5 is according to a kind of a kind of circuit diagram of implementation structure of processing unit of the present invention；
Fig. 6 is the partial enlarged view of Fig. 1；
Fig. 7 is the structural schematic diagram according to first collecting unit of one embodiment of the present of invention；
Fig. 8 is the exploded view according to the wheel set assembly of one embodiment of the present of invention；
Fig. 9 is the installation diagram according to the brush head of one embodiment of the present of invention；
Figure 10 is the schematic diagram of another angle of Fig. 9.
Reference sign：
U1- drive modules；U2- current detection modules；
U3- locating modules；U4- power modules；
The first collecting units of U21-；The second collecting units of U22-；
U23- processing units；The first amplifying circuits of U231-；
The second amplifying circuits of U232-；U233- difference scaling circuits；
U234- computing units；U24- position acquisition units；
A1, A2, A3- amplifier chip；R1~R7- resistance；
1- pipe current detection devices；2- pipelines；
3- protects anode；CR- contact ranges；
11- electrode wheels；13- frames；
14- leather cups；The first springs of 15-；
16- second springs；17- first support arms；
19- slip rings；21- mileage wheels；
22- brush head 23- second support arms；
24- connecting shafts；30- bearings；
31- end caps；32- third support arms；
The first fulcrums of 33-；The second fulcrums of 34-；
14a- arc alar parts.
Specific implementation mode
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should be noted that：Unless in addition having
Body illustrates that the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to the present invention
And its application or any restrictions that use.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.
The present invention provides a kind of pipe current detection devices, and as shown in Figs 1-4, which is used for
Current detecting is carried out inside pipeline 2.The pipe current detection device 1 includes drive module U1 and current detection module U2.It drives
Dynamic model block U1 is arranged to driving current detection module U2 and advances inside pipeline, so that current detection module U2 and inner wall of the pipe
Contact range CR change.Current detection module U2 is arranged to detect electric current of the pipeline 2 in contact range CR.
When drive module U1 driving current detection modules U2 advances in pipeline, current detection module U2 and inner wall of the pipe
Contact range CR change.Specifically, current detection module U2 can be that two point form is contacted with inner wall of the pipe, then, this
Range can be exactly current detection module U2 and the contact range CR of inner wall of the pipe between two contact points.
Current detection module U2 can be according to preset frequency during traveling to different contact range CR on pipeline
Interior electric current is detected.Such as can be contact range CR with the frequency detecting current detection module of 1KHz and inner wall of the pipe
Interior electric current.
The electric current in different contact ranges detected according to current detection module U2, so that it may to identify the moon on pipeline
Failure and stray electrical current interference are protected in pole, determine fault signature present in Corrosion and protection project.
Specifically, when the fluctuation of the current detection module U2 all electric currents detected in a segment pipe is in preset range
It is interior and when being not zero, show that the cathodic protection of this segment pipe works well.When current detection module U2 is examined in a segment pipe
When the size of all electric currents measured is zero, show that cathodic protection system is in open-circuit condition, at this time this segment pipe the moon
Protect thrashing in pole.When the big minor swing for all electric currents that current detection module U2 is detected in a segment pipe is more than default
Range is even when exchanging, to show larger in the stray electrical current of this segment pipe, it may be possible on other pipelines intersected with it
Electric current the cathodic protection current of this segment pipe is had an impact.By calculating the actually detected electric current arrived and normal current
Difference can obtain the size of stray electrical current.
Since the pipe current detection device of the present invention is arranged inside pipeline, advance from the inside of pipeline to carry out electric current
Detection, this not limited the detection of the cathodic protection current of pipeline by external geographical conditions.Pipe current detection dress
The applicability set is good.
In addition, the pipe current detection device can calculate the size of stray electrical current by difference operation, so that
It is more acurrate to the assessment of the cathodic protection of pipeline, accuracy of detection higher.
In addition, the pipe current detection device need not detect the resistance drop of soil, cathodic protection system will not be interfered
Normal work, realize on-line checking.
In one particular embodiment of the present invention, drive module U1 can be the form of active drive.Specifically, driving
Module U1 itself has dynamic component such as can be motor.
In another specific embodiment of the present invention, drive module U1 can also be passive matrix form.Specifically, driving
Dynamic model block U1 can be by the media drive that is flowed in pipeline, to drive current detection module U2 in pipeline along the flowing of medium
It advances in pipeline in direction.Medium in pipeline is specifically the gas either oil etc. flowed in pipeline.
Further, as shown in fig. 6, drive module U1 can be leather cup 14, the intrados of the leather cup 14 is by the pipe
Medium in road pushes, and is formed and is stopped to medium；The extrados of leather cup 14 is towards direction of travel.Direction of travel refers to pipe current
The direction that detection device is advanced in pipeline.In general, direction of travel is parallel to the trend of pipeline.
In one example, as shown in fig. 6, leather cup 14 includes interconnecting piece and the arc alar part 14a around interconnecting piece setting.
Interconnecting piece is connect with frame.The intrados of arc alar part 14a is pushed by the medium in pipeline.
When in use, towards direction of travel, intrados forms medium to be stopped the extrados of leather cup 14.Preferably, leather cup
14 outer diameter is suitable with the internal diameter of pipeline 2, so that leather cup 14 has the driving area of bigger.The media such as oil, gas flow in pipeline 2
When dynamic, thrust can be formed to leather cup 14.This makes current detection module U2 advance under the drive of leather cup 14.
For example, the flow velocity of the media such as oil, gas is 0.5-4m/s.The gait of march of current detection module U2 is identical as the flow velocity
Or it is less than the flow velocity.
In one particular embodiment of the present invention, as shown in figure 3, current detection module U2 includes the first collecting unit
U21, the second collecting unit U22 and processing unit U23.First collecting unit U21 is arranged to acquire itself to be connect with inner wall of the pipe
The current potential of tactile first position；Second collecting unit U22 is arranged to acquire the second position that itself is contacted with inner wall of the pipe
Current potential.Wherein, the first collecting unit U21 makes first position and the second position exist relative to the setting of the second collecting unit U22
There is setpoint distance in duct orientation.Processing unit U23 be arranged to the current potential according to first position, the second position current potential,
And resistance of the pre-stored pipeline in setpoint distance, determine electric current of the pipeline in contact range.First position on pipeline
Ranging from contact range CR between the second position.
Specifically, it is specially first position and second that first position and the second position have setpoint distance in duct orientation
Between duct length be setpoint distance.With travelings of the current detection module U2 in pipeline, first position and the second position
Can change as traveling synchronizes, but the distance of first position and the second position in duct orientation be it is constant, always
For setpoint distance.
By being contact range CR between first position and the second postion, therefore, the electric current calculated in contact range CR can
With according between first position and the second position potential difference and first position and the second position between resistance, be calculated
Electric current of the pipeline in contact range.
There is setpoint distance, therefore, for same pipeline, in setpoint distance between first position and the second position
Resistance is only related with the material of pipeline, thickness etc..So, resistance between first position and the second position, i.e. pipeline setting away from
It does not change with the traveling of current detection module U2 from interior resistance.It therefore, can be in advance in current detection module U2 memories
Resistance of the pipeline in setpoint distance is stored up, for current detection module U2 according to the current potential of the first position detected, second
Electric current in the current potential of position and the resistance calculations contact range to prestore.
Further, the structure of the first collecting unit U21 and the second collecting unit U22 can be identical, therefore, the present embodiment
Only illustrated by taking the structure of the first collecting unit as an example.
As shown in fig. 6, the first collecting unit U21 may include support portion and electrode wheel 11, electrode wheel 11 turns with support portion
Dynamic connection, electrode wheel 11 are made by conductor.Electrode wheel 11 is wheeled electrode, can be rolled along inner wall of the pipe.Support portion
Electrode wheel 11 is used to support to contact with inner wall of the pipe.Electrode wheel 11 with the inner wall of pipeline 2 by contacting, to itself and inner wall of the pipe
Current potential on contact position is acquired.Support portion can have elasticity, so that electrode wheel 11 and inner wall of the pipe Elastic Contact.
For example, support portion may include shrapnel, spring or elastic rubber.Support portion makes electrode by the elasticity of itself
Wheel 11 and inner wall of the pipe Elastic Contact.
First collecting unit U21 acquires the current potential of the first position itself contacted with inner wall of the pipe by electrode wheel 11, can
To reduce running resistances of the current detection module U2 in pipeline.
In one example, as shown in figs 6-8, which further includes frame 13, the first collecting unit
U21 is arranged on frame 13, and support portion includes the first elastic element and first support arm 17.First support arm 17 is pivotally connected with frame 13.
One end of first elastic element is connect with first support arm and the other end is connect with frame 13.17 turns of electrode wheel 11 and first support arm
Dynamic connection.First elastic element forms pre- elastic force to first support arm 17, so that electrode wheel and inner wall of the pipe Elastic Contact.Specifically
, the second collecting unit U22 can be arranged on the frame 13, can also be arranged on another frame.
For example, the middle part of first support arm 17 has dog-ear.It is pivotally connected with plank at dog-ear, to form fulcrum.Electrode 11 and
One support arm 17 is rotatablely connected.First elastic element is the first spring 15.One end of first spring 15 and first support arm 17 and electricity
The opposite one end clamping of pole wheel 11.The other end of first spring 15 is clamped with frame 13.Electrode wheel 11 can be conductive.When being placed
When in pipeline 2, the pre- elastic force of the first spring 15 makes the outside inner wall for compressing pipeline 2 of electrode wheel 11.
In other examples, one end of first support arm 17 is pivotally connected with frame 13.Electrode wheel 11 is arranged on first support arm 17
The other end.First spring 15 is compression spring.First spring 15 is fixed on the middle part of first support arm 17.This mode can equally make
Electrode wheel 11 compresses the inner wall of pipeline outward.
In this example embodiment, due to the effect of the first elastic element, therefore the contact of first collecting unit with inner wall of the pipe is good
It is good, the accuracy of current detecting can be improved.
In addition, the structure makes the stretching adjustable angle of electrode wheel, to adapt to different tube diameters pipeline detection.
In one example, as shown in figure 8, the first collecting unit U21 further includes slip ring 19.Slip ring 19 and electrode wheel 11
Axis contacts, to conduct electric potential signal.The other end of slip ring 19 can be connect by conducting wire with processing unit U23.In other examples
In, the first collecting unit U21 can also include brush.Electrode wheel 11 conducts electric potential signal by brush.
In one example, it is additionally provided with bearing 30 between the axis of electrode wheel 11 and first support arm 17.By the way that axis is arranged
30 are held, the friction of first support arm 17 and electrode wheel can be reduced, to more effectively reduce the running resistance of detection device.
For example, first support arm 17 is arranged in pairs, electrode wheel is sandwiched between two first support arms 17.Two bearings 30 are distinguished
In embedded two first support arms 17.It is additionally provided with end cap 31 in the outer end of two first support arms 17.This mode makes first to adopt
Collect the structural strength higher of unit.
Preferably, as shown in figure 8, it is fluted in the setting of the outer surface of electrode wheel 11.For example, groove is tooth socket.Tooth socket is equal
The even outer surface for being distributed in electrode wheel 11.The trend of tooth socket is parallel to the circumferential direction of electrode wheel or walking for axial direction or tooth socket
To with it is axial be in arbitrary angle.By the way that groove is arranged in the outer surface of electrode wheel, outer surface and inner wall of the pipe friction can be increased
And it can guarantee that electrode wheel contacts well with inner wall of the pipe.
In some oil, letter shoot roads, inner wall of the pipe is attached with the larger molecular organics such as paraffin, iron rust, silt etc..This
A little substances influence acquisition of the electrode wheel to itself and the current potential of inner wall of the pipe contact position, cause cathodic protection current detection inaccurate
Really.
In one example, as shown in fig. 6-7, the first collecting unit U21 further includes sanding component.Sanding component is set
On frame 13.Sanding component includes brush head 22.Brush head 22 be located at electrode wheel 11 along the front of direction of travel.Brush head 22 is by structure
It makes as the attachment for removing inner wall of the pipe, so that electrode wheel 11 good can be contacted with inner wall of the pipe.
Sanding component can effectively polish off attachment, this enables electrode wheel 11 more effectively to contact in pipeline
Wall, to improve the precision of cathodic protection current detection.
Preferably, the contact surface of brush head 22 has dentalation.The trend of the tooth of dentalation is perpendicular to direction of travel.Example
Such as, the entirety of contact surface is rectangle.Rectangular long side is parallel to direction of travel.The trend of the tooth of dentalation is perpendicular to row
Into direction.Dentalation can more effectively polish off attachment.
Preferably, the material of brush head is 20CrMnTi, and the wearability of this material is good.
In one example, as shown in figs. 9-10, sanding component further includes second support arm 23, third support arm 32 and the second bullet
Property element.The joint face of brush head has the first fulcrum 33 and the second fulcrum 34.Joint face is opposite with contact surface.Third support arm 32
One end is pivotally connected with the first fulcrum 33, and the other end is pivotally connected with frame 13.One end of second support arm 23 is pivotally connected with the second fulcrum 34,
And middle part is pivotally connected with frame 13.For example, the middle part of second support arm 23 has dog-ear.It is pivotally connected with frame 13 at dog-ear.Third branch
Arm 32, brush head, the part of second support arm 23 and frame 13 part surround quadrangle.Quadrangle has morphotropism.Second bullet
One end of property element is connect with one end of the separate brush head of third support arm 32, and the separate brush head of the other end and second support arm 23
One end connection, to tense second support arm 23 and third support arm 32.For example, the second elastic element can be second spring 16.
The elastic force of second spring 16 makes second support arm 23 and third support arm 32 form branch to two fulcrums 33,34 of brush head
Support, the contact surface and being bonded for inner wall of the pipe to make brush head are closer, and polishing effect is more preferable.
In addition, the distance that the structure enables brush head to outwardly protrude adjusts, to enable the pipe current detection device
Adapt to the detection of the pipeline of different tube diameters.
Preferably, as shown in fig. 6, being both provided with leather cup on two end faces of frame 13, and the two leather cups are arranged in the same direction.
Current detecting unit U2 can have multiple first collecting units.Multiple first collecting units are located between two leather cups, and
And it is evenly distributed on the circumferential direction of frame, and every one first collecting unit and the contact position of inner wall of the pipe are located at perpendicular to pipeline side
To same plane on.In this way, can ensure the balance of current detection module U2 during advancing.
The setting of two leather cups makes driving force biggers of the drive module U1 to current detection module U2.
In addition, two leather cups are located at frame both ends, it can be effectively protected in this way positioned at the first intermediate collecting unit
U21。
First collecting unit U21, second detection unit U22 and processing unit U23 are cascaded in structure.Place
Managing unit U23 can be between the first collecting unit U21 and second detection unit U22.Alternatively, the first collecting unit U21
It can be between second detection unit U22 and processing unit U23.Can also be that second detection unit U22 is located at the first acquisition
Between unit U21 and processing unit U23.The mode being arranged in series makes current detection module U2 break the whole up into parts, this makes electric current examine
The structure outer diameter for surveying module U2 becomes smaller, in order to enter in pipeline and in pipeline inside turn.
Preferably, above-mentioned adjacent cells (are specifically the first collecting unit U21, second detection unit U22 and processing unit
Unit adjacent in structure U23) between linked together by universal joint, in order to which current detection module U2 is in pipeline
Turning.It is also possible that linking together by rope between above-mentioned adjacent unit, equally it is convenient for current detection module U2 in this way
Turning in pipeline.For example, in the end set of the first collecting unit U21, second detection unit U22 and processing unit U23
There is connecting shaft 24.Adjacent connecting shaft 24 can be connected by universal wheel.
Still further, as shown in figure 4, processing unit U23 includes the first amplifying circuit U231, the second amplifying circuit
U232, difference scaling circuit U233 and counting circuit U234.First amplifying circuit U231 is arranged to first position
Current potential is amplified processing and obtains the first amplification current potential；Second amplifying circuit U232 is arranged to carry out the current potential of the second position
Enhanced processing obtains the second amplification current potential；Difference scaling circuit U233 is arranged to the first amplification current potential and the second amplification
Current potential carries out difference scale operation and obtains amplification potential difference；Counting circuit U234 be arranged to according to amplification potential difference and in advance
Resistance of the pipeline of storage in setpoint distance calculates amplification electric current of the pipeline in contact range.Wherein, the first amplifying circuit
The amplification factor of U231 and the second amplifying circuit U232 are identical.
It carries out obtaining the first amplification electricity after amplification in proportion by the current potential of current potential and the second position to first position
Position and the second amplification current potential, are amplified to obtain amplification potential difference, then root to the difference of the first amplification current potential and the second amplification current potential
Amplification electric current of the pipeline in contact range can be calculated according to the resistance of amplification potential difference and pipeline in setpoint distance.According to
The amplification factor of one amplifying circuit U231, the second amplification factor of amplifying circuit U232 and putting for differential amplification computing circuit U233
Big multiple, it may be determined that amplification electric current amplification factor relative to actual current of the pipeline in contact range.Therefore, pass through this
Embodiment can be amplified processing to electric current of the pipeline in contact range.
In this way, by being amplified processing to electric current of the pipeline in contact range, current detection module U2 can be improved
Accuracy of detection.
On this basis, the first amplifying circuit U231, the second amplifying circuit U232, difference scaling circuit U233 can be with
It is to be realized by circuit structure as shown in Figure 5.The in-phase input end in1 of amplifier chip A1 is used for and the first collecting unit
U21 connections, receive the current potential of first position；The in-phase input end in2 of amplifier chip A2 is used to connect with the second collecting unit U22
It connects, receives the current potential of the second position；The output end out3 of amplifier chip A3 will amplify current potential for being connect with computing unit U4
Difference is sent to computing unit U4.Wherein, the resistance value of resistance R1 and R2 is equal, and the resistance value of resistance R4 and R6 are equal, resistance R5 and R7
Resistance value it is equal.
For example, when the resistance value of resistance R1 and R3 are 200k Ω, the resistance value of resistance R2 is 2k Ω, the resistance value of resistance R4 and R6
It is 1k Ω, the resistance value of resistance R5 and R7 are 100k Ω, then, according to the first amplifying circuit in circuit as shown in Figure 5
The multiple that U231 is amplified the current potential of first position is 201 times, obtains the first amplification current potential, is transmitted to difference ratio enlargement
The in-phase input end of circuit U 233；The multiple that second amplifying circuit U232 is amplified the current potential of the second position is 201 times, is obtained
To the second amplification current potential, it is transmitted to the inverting input of difference scaling circuit U233.So, the first amplification current potential and second
The difference of amplification current potential is exaggerated 201 times relative to the difference of the current potential of the current potential and second position of first position.Difference ratio enlargement
Circuit U 233 is amplified the difference of the first amplification current potential and the second amplification current potential again, and the multiple of amplification is 100 times, is put
Big potential difference.So, difference of the amplification potential difference between the current potential of first position and the current potential of the second position, is exaggerated
201*100=20100 times.
As shown in figure 3, current detection module U2 further includes position acquisition unit U24.Position acquisition unit U25 is set
It is set to and obtains the positions of current detection module U2 in the duct, and be sent to processing unit U23.Processing unit U23 is also set
For the corresponding contact range of each electric current of location determination obtained according to position acquisition unit U24.Specifically, processing unit U23
Sample frequency with position acquisition unit U24 can be identical, to ensure the synchronization of the corresponding contact range of each electric current.In this way,
According to the correspondence of each electric current and contact range, it may be determined that processing unit U23 obtains current detecting mould when each electric current
Block U2 is the location of in pipeline, in this way, it is possible to the case where more accurately obtaining the cathodic protection of each position of pipeline, just
The position that pipeline breaks down in Corrosion and protection project can be fast and accurately found to repair in operating personnel.
In one particular embodiment of the present invention, position acquisition unit U24 may include acceleration transducer.Pass through
Integral operation is carried out to the acceleration information of acceleration transducer acquisition, the slave pipeline starting of current detection module U2 can be obtained
The travel distance that position starts.Current detecting mould when can determine that processing unit U23 obtains each electric current according to the travel distance
Block U2 is the location of in pipeline.
In another specific embodiment of the present invention, as shown in fig. 6, position acquisition unit U24 may include mileage
Wheel 21.Mileage wheel 21 is contacted with the inner wall of pipeline 2, to obtain travel distances of the current detection module U2 in pipeline.According to inner
The turnning circle of journey wheel 21 can then determine the travel distance since 2 initial position of pipeline of current detection module U2.According to
The travel distance can determine that current detection module U2 is the location of in pipeline when processing unit U23 obtains each electric current.
Mileage wheel has high certainty of measurement, small feature.
As shown in figs. 4 and 6, which further includes locating module U3.Locating module is arranged to emit
Positioning signal, so that operating personnel position the pipe current detection device according to the positioning signal.
In the detection process of pipe current detection device, current sensing means may due to line clogging either itself
The problems such as damage, can not continue on.So, operating personnel can find according to the positioning signal of locating module U3 transmittings and be somebody's turn to do
Current sensing means, in order to further take measures.
In one particular embodiment of the present invention, positioning device U3 may include transmitter, and transmitter is arranged to
Positioning signal is sent out, is received for the receiving device of operating personnel.It, can not be in the duct when in-pipeline detection device breaks down
When traveling, operating personnel receive the positioning signal that locating module U3 is sent out by receiving device, and then determine pipe current inspection
The position of device in the duct is surveyed, in order to further take measures.
In another specific embodiment of the present invention, locating module U3 may include positioning unit and communication unit.
Positioning unit can be provided by least one of GPS positioning chip, Big Dipper positioning chip, Galileo positioning chip.It is logical
Letter unit such as can be, but not limited to by mode 4G networks, 3G network, GPRS, Wi-Fi send positioning unit acquisition determine
Position signal, so that operating personnel position the pipe current detection device according to the positioning signal of reception.
As shown in figs. 4 and 6, which further includes power module U4, power module U4 be arranged to
Current detection module U2 and locating module U3 power supplies, to ensure the normal use of current detection module U2 and locating module U3.
Preferably, arbitrary in the first collecting unit U21, second detection unit U22, processing unit U23, power module U4
One both ends is both provided with leather cup 14.The setting of multiple leather cups 14 can further increase the driving of pipe current detection device
Power.
The various embodiments described above primary focus describes difference from other examples, but those skilled in the art should be clear
Chu, the various embodiments described above can be used alone or be combined with each other as needed.
Although some specific embodiments of the present invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to illustrating, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above example.This hair
Bright range is defined by the following claims.
Claims (10)
1. a kind of pipe current detection device, which is characterized in that the pipe current detection device inside pipeline for carrying out
Current detecting, the pipe current detection device include drive module and current detection module, and the drive module is arranged to
The current detection module is driven to advance inside the pipeline, so that contact model of the current detection module with inner wall of the pipe
It encloses and changes；The current detection module is arranged to detect electric current of the pipeline in the contact range.
2. pipe current detection device according to claim 1, which is characterized in that the current detection module includes processing
Unit, the first collecting unit and the second collecting unit；First collecting unit is arranged to acquire in itself and the pipeline
The current potential of the first position of wall contact；Second collecting unit is arranged to acquire itself contacted with the inner wall of the pipe
The current potential of two positions；Wherein, the setting of relatively described second collecting unit of first collecting unit makes the first position
There is setpoint distance in duct orientation with the second position；The processing unit is arranged to the electricity according to the first position
The resistance in the setpoint distance of current potential and the pre-stored pipeline of position, the second position, determines the pipeline
Electric current in the contact range.
3. pipe current detection device according to claim 2, which is characterized in that the processing unit includes the first amplification
Circuit, the second amplifying circuit, difference scaling circuit and counting circuit, first amplifying circuit are arranged to described
The current potential of one position is amplified processing and obtains the first amplification current potential；Second amplifying circuit is arranged to the second
The current potential set is amplified processing and obtains the second amplification current potential；The difference scaling circuit is arranged to put to described first
Big current potential and the second amplification current potential carry out difference scale operation and obtain amplification potential difference；The counting circuit is arranged to root
According to the resistance of the amplification potential difference and the pre-stored pipeline in the setpoint distance, the institute of the pipeline is calculated
State pipeline the contact range electric current；Wherein, the amplification factor of first amplifying circuit and second amplifying circuit
It is identical.
4. pipe current detection device according to claim 2, which is characterized in that the current detection module further includes position
Acquiring unit is set, the position acquisition unit is arranged to obtain position of the current detection module in the pipeline, and
It is sent to the processing unit；It is every that the processing unit is also configured to the location determination obtained according to the position acquisition unit
The corresponding contact range of one electric current.
5. pipe current detection device according to claim 4, which is characterized in that the position acquisition module includes mileage
Wheel, the mileage wheel contacts with the inner wall of the pipeline, with obtain traveling of the current detection module in the pipeline away from
From.
6. pipe current detection device according to claim 4, which is characterized in that the processing unit and the position are obtained
Take the sample frequency of unit identical.
7. pipe current detection device according to claim 1, which is characterized in that the drive module is arranged to by institute
The media drive flowed in pipeline is stated, to drive flowing side of the current detection module along the medium in the pipeline
It advances in pipeline.
8. pipe current detection device according to claim 7, which is characterized in that the drive module is leather cup, described
The intrados of leather cup is pushed by the medium.
9. pipe current detection device according to claim 1, which is characterized in that the pipe current detection device is also wrapped
Locating module is included, the locating module is arranged to emit positioning signal, fixed according to the positioning signal for operating personnel
The position pipe current detection device.
10. pipe current detection device according to claim 1, which is characterized in that the pipe current detection device is also
Including power module, the power module is arranged to power to the current detection module.
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| CN201810128841.9A CN108315741B (en) | 2018-02-08 | 2018-02-08 | Pipeline current detection device |
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| CN201810128841.9A CN108315741B (en) | 2018-02-08 | 2018-02-08 | Pipeline current detection device |
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| CN109628938A (en) * | 2018-12-29 | 2019-04-16 | 江苏科盾检测技术有限公司 | A kind of gas pipeline cathodic protection detection device |
| CN110006955A (en) * | 2019-04-23 | 2019-07-12 | 广东省海洋工程装备技术研究所 | It is a kind of for detecting the detection device of sand content in oil-gas pipeline |
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| CN108315741B (en) | 2020-04-03 |
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