CN208762578U - A kind of cathodic protection potential detection device - Google Patents
A kind of cathodic protection potential detection device Download PDFInfo
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- CN208762578U CN208762578U CN201821266867.1U CN201821266867U CN208762578U CN 208762578 U CN208762578 U CN 208762578U CN 201821266867 U CN201821266867 U CN 201821266867U CN 208762578 U CN208762578 U CN 208762578U
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- cathodic protection
- test piece
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Abstract
The utility model relates to a kind of cathodic protection potential detection devices; including probe insulation shell, cathodic protection test piece and reference electrode; the probe insulation shell is the cavity of inner hollow; filler material is filled in cavity; the cathodic protection test piece, reference electrode are embedded on the roof of probe insulation shell, and the top of cathodic protection test piece, reference electrode is concordant with the outside of the roof；The cathodic protection test piece is closed annular, and the reference electrode is located among the encirclement of cathodic protection test piece.The characteristics of cathodic protection potential detection device of the utility model has structure simple, and measurement result is reliable, the service life is longer.
Description
Technical field
The utility model relates to cathodic protection detection technique field, in particular to a kind of cathodic protection potential test device and
Its test method.
Background technique
The buried objects of metals such as long fortune pipeline can be realized using cathode protecting process it is anticorrosive, and to metals such as long fortune pipelines
The accurate measurement of the cathodic protection potential of buried object, buried current potential is the key that such cathodic protection system.
Currently, well known polarized probe is composed of reference electrode, test piece, connecting wire, insulating layer and filler material.It will
Reference electrode and test piece are put into probe, probe be made of insulating material in itself, serve as insulating layer, the rest part in probe by
Filler material occupies.When carrying out the measurement of buried pipeline somewhere cathodic protection potential, the test piece in probe is connected with test pile, so
During probe is placed into the soil afterwards, after waiting test pieces sufficiently to polarize, the power-off voltage between test piece and reference electrode is measured, this voltage can
It is considered the cathodic protection potential of pipeline at test pile.
The mode of common measurement polarization potential (cathodic protection potential) has immediate electrical outage and test piece to power off two kinds of method, wink
Interruption electrical method can be often difficult to carry out in practical projects because many inconvenient.
Test piece power-off method is that a test piece is buried at test point, and material, embedded conditions dictate be identical as pipeline or phase
Closely, test piece and the buried object of metal to be measured are electrically connected with conducting wire, and providing protective current to test piece from metal component makes test piece polarize.It surveys
The connecting wire between test piece and the buried object of metal need to be only disconnected when amount, so that it may test piece switch-off potential is measured, by the disconnected of test piece
Electric potential represents the current potential of the buried object of metal, so as to avoid cutting main protection electric current and the trouble of other electrical connections.
But in the case where there is stray electrical current disturbed condition, since stray electrical current can flow on the test path of test piece and reference electrode
It is dynamic, the error of measurement result can be brought, i.e., is still unable to get accurate polarization potential.And for example buried steel of current certain metal components
The environmental aspect of matter pipeline is complex, and especially alternating current-direct current stray electrical current interference is very universal, in this disturbed condition
Under how to be just particularly important to measure to obtain true pipeline cathode protection polarization potential.
Further, since the detection of cathodic protection potential needs for a long time, persistently to carry out, and repeatedly fill cathodic protection potential
Detection device can also consume a large amount of manpower and material resources, increase maintenance cost, and the polarization of detection device is also required to the long period, because
This needs to fill cathodic protection potential detection device for a long time in the soil near the buried object of metal to be measured, in order to be able to long
Phase monitoring, repeatedly measurement；Filler material is generally copper-bath inside the phase detection device of the prior art, needs to place downward and bury
In burying, test piece, reference electrode are located at the bottom of detection device；In this way, which earth's surface has certainly with the passage of landfill time
Right sedimentation then makes reference electrode, cathodic protection examination in addition rainwash, can make the soil losses of detection device bottom
The contact effect between soil such as piece is deteriorated, or even no longer contacts, and not only leads to not measure true cathodic protection potential,
It also needs to be filled again incessantly, increases maintenance cost；Simultaneously because electrolyte loss is very fast, detection device is influenced
Service life.
Utility model content
In order to solve the above-mentioned problems in the prior art, the utility model provides a kind of cathodic protection potential detection
Device.The technical problems to be solved in the utility model is achieved through the following technical solutions:
A kind of cathodic protection potential detection device, including probe insulation shell, cathodic protection test piece and reference electrode；
The probe insulation shell is the cavity of inner hollow, is filled with filler material in cavity, the cathodic protection test piece,
Reference electrode is embedded on the roof of probe insulation shell, and cathodic protection test piece, the top of reference electrode and the roof
Outside it is concordant；
The cathodic protection test piece is closed annular, and the reference electrode is located among the encirclement of cathodic protection test piece.
Above-mentioned cathodic protection potential detection device, further includes multi-cable, is set on the roof of the probe insulation shell
There is the threading hole passed through for the multi-cable, which is located at the outside of cathodic protection test piece；
The multi-cable includes cathodic protection cable, reference cable, and one end of the cathodic protection cable and cathode are protected
Test piece connection is protected, one end of reference cable is connect with cathodic protection test piece；The other end of cathodic protection cable and reference cable from
The threading hole is pierced by the probe insulation shell.
Above-mentioned cathodic protection potential detection device, the filler material are low-impedance solid filler material.
Above-mentioned cathodic protection potential detection device, the solid filler material are bentonite.
Above-mentioned cathodic protection potential detection device, the probe insulation shell, which is adopted, to be made from an insulative material, the insulation
Material is polyvinyl chloride or polytetrafluoroethylene (PTFE).
Above-mentioned cathodic protection potential detection device, which further includes ac cable, exchanges examination on the roof with being embedded
Piece, the exchange test piece are located at cathodic protection test piece side and concordant with the roof；
Described ac cable one end is connect with exchange test piece, and the other end is pierced by the probe insulation shell from the threading hole
Body.
The utility model has the beneficial effects that
1, the cathodic protection potential detection device of the utility model, by the setting of reference electrode in cathodic protection test piece
Side masks the stray electrical current for flowing through or flowing into test path by the cathodic protection test piece of annular, to eliminate interference electricity
The raw pressure drop of miscarriage, guarantees the accurate measurement of cathodic protection potential and buried current potential.
2, reference electrode, cathodic protection test piece and threading hole are arranged at the roof of insulation shell by the utility model
On, when use by present apparatus top end upward, whole device bury in the soil, allow the present apparatus with reference electrode, cathode
Protection tries to fill in soil far from the mode in the earth's core, avoids keeping reference electric due to normally settling etc. rain drop erosion, earth's surface
The contact effect of pole, cathodic protection test piece with soil is deteriorated, so as to cause the big problem of measurement result deviation；With structure letter
The features such as list, measurement result is reliable, and Acceptable life is long.
3, the filler material of the utility model uses low-impedance solid filling, and solid filling can effectively avoid filling
The generation of leakage phenomenon is expected, to avoid polluting cathodic protection test piece and reference electrode because liquid filler material leaks, further
Guarantee the accuracy of measurement result.
The utility model is described in further details below with reference to accompanying drawings and embodiments.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the cathodic protection potential detection device of the utility model.
Fig. 2 is the schematic top plan view of the cathodic protection potential detection device of the utility model.
Fig. 3 is the use state of the cathodic protection potential detection device of the utility model with reference to figure.
In figure: 1, probe insulation shell；2, cathodic protection test piece；3, reference electrode；4, test piece is exchanged；5, threading hole；6,
Filler material；7, soil；8, ac cable；9, cathodic protection cable；10, reference cable.
Specific embodiment
Reach the technical means and efficacy that predetermined purpose is taken for the utility model is further described, below in conjunction with attached drawing
And embodiment, to specific embodiment of the present utility model, structure feature and its effect, detailed description are as follows.
Cathodic protection potential test device in order to solve the prior art causes it to measure due to being influenced by stray electrical current
Cathodic protection potential measurement result inaccuracy problem, present embodiments provide a kind of cathodic protection potential detection device,
Including probe insulation shell 1, cathodic protection test piece 2 and reference electrode 3, the probe insulation shell 1 is the cavity of inner hollow,
Filler material 6 is filled in cavity, the cathodic protection test piece 2, reference electrode 3 are embedded on the roof of probe insulation shell 1,
And the top of cathodic protection test piece 2, reference electrode 3 is concordant with the outside of the roof；The cathodic protection test piece 2 is closed
Annular, the reference electrode 3 are located among the encirclement of cathodic protection test piece 2；
The cathodic protection test piece 2 of annular can shield the electric current for flowing through test path, to eliminate interference electric current generation
Pressure drop；The shape of cathodic protection test piece 2 can be arbitrary closed ring, such as regular polygon, irregular polygon etc.,
As long as being capable of forming a closed through-hole to surround reference electrode 3；The cathodic protection test piece 2 of such structure can be with
Interference electric current, interference magnetic field and electric interfering field in test on shielding test path, make cathodic protection test piece 2 be in same
Current potential, in order to obtain true cathodic protection potential.And cathodic protection test piece 2 use good conductor, such as copper, iron or with to
Survey the identical metal material of the buried object of metal.
The multi-cable includes cathodic protection cable 9, reference cable 10, one end and the yin of the cathodic protection cable 9
Pole protects test piece 2 to connect, and one end of reference cable 10 is connect with cathodic protection test piece 2；Cathodic protection cable 9 and reference cable 10
The other end be pierced by the probe insulation shell 1 from the threading hole 5.
The filler material 6 of the present embodiment uses low-impedance solid filler material, can be had using low-impedance solid filler material
Effect avoids 6 leakage phenomenon of filler material from occurring, to avoid the accident for polluting test piece and reference electrode 3 because of liquid filler material leakage
Occur；Copper-bath etc. in general test piece can penetrate near test piece, cause test piece to chemically react, and eventually lead to
There is significantly deviation in protection potential measurement, and it is insincere and unavailable to even result in data.Low-impedance solid filler herein
The resistivity of material is generally less than 20 ohm-meters (Ω/m)；In addition, the moisture of the present embodiment is between reference electrode and insulation shell
Gap in penetrate into, bentonite can expand after absorbing moisture, and then prevent excess moisture from entering inside insulation shell；When more
Dry time or area in use, can water in the soil at the place of this detection device, make water from soil permeability to
This detection device place, then further from the gap penetration between test piece and insulation shell to bentonite where space；Certainly
Special Self-watering equipment can be equipped with.
Solid filler material can select bentonite or montmorillonite, and bentonite is using montmorillonite as the non-of main mineral constituent
Mineral metal products, smectite structure are pressed from both sides the 2:1 type crystal structure that one layer of alumina octahedral forms by two oxygen-octahedrons, due to
There are certain cations, such as Cu, Mg, Na, K for the layer structure that montmorillonite structure cell is formed, and these cations and montmorillonite are brilliant
The effect of born of the same parents is very unstable, is easily partially or completely exchanged by other cations, therefore has preferable ion exchangeable；
By the type of montmorillonite exchangeable cations, content and interlayer charge size, bentonite can be divided into sodium bentonite
(alkaline soil), calcium-base bentonite (alkaline earth soil), natural bleaching are native (acid soil or Emathlite), and wherein calcium-base bentonite wraps again
Include calcium sodium base and calcium and magnesium base etc..Bentonite has strong hygroscopicity and dilatancy, the water of adsorbable 8~15 times of own vols
Amount, volume expansion is up to several times to 30 times；It can be dispersed into as a form of gel and suspension in an aqueous medium, this medium solution has one
Fixed viscosity, thixotropy and lubricity；There is stronger cation exchange capacity (CEC)；Have one to various gases, liquid, organic substance
Fixed adsorption capacity, maximal absorptive capacity is up to 5 times of itself weight；The admixture of it and water, mud or fine sand has plasticity
And cohesiveness；Acid bleaching with surface-active native (atlapulgite, natural bleaching soil-Emathlite) can adsorb it is coloured from
Son.
In addition, the probe insulation shell 1 of the present embodiment is made of isolation material, material can choose polyvinyl chloride or poly-
Tetrafluoroethene.
Test piece 4 is exchanged on the roof with being embedded in addition, further including ac cable 8, and the exchange test piece 4 is located at institute
State 2 side of cathodic protection test piece and concordant with the roof；Described 8 one end of ac cable with exchange test piece 4 connect, the other end from
The threading hole 5 is pierced by the probe insulation shell 1.Exchange test piece 4 is used for and is passed through measuring instrument after protective electrical communication
Device measures reference electrode 3 and by the alternating current and alternating voltage between protective.
The stray electrical current on ginseng test path is masked except through the cathodic protection test piece 2 of annular, to guarantee to pass through
Other than the accuracy of the cathodic protection potential of the device to test and buried current potential, the cathodic protection potential of the utility model detects dress
It sets also by the way that the same of probe insulation shell 1 is arranged in threading hole 5, reference electrode 3, cathodic protection electrode and exchange test piece 4
Side, and reference electrode 3, the exposed surface of cathodic protection test piece 2 and exchange test piece 4 and threading hole 5 are generally aligned in the same plane, so that
The reference electrode 3 of this detection device, cathodic protection test piece 2, exchange test piece 4 can fill in a manner of far from the earth's core in soil 7
In, in this way, which even if the reasons such as rain drop erosion ground settlement lead to the bottom of detection device, side soil erosion, reference electricity
Pole 3, cathodic protection test piece 2 and exchange test piece 4 still can well be contacted with the soil 7 being covered at the top of it, and be absorbed from ground
The moisture that table penetrates into is to keep inside stuffing to have certain humidity, and the solution leakage pollution examination being avoided that in reference electrode 3
Built-in testing environment, thus detection device has and can run steadily in the long term, and do not have to the characteristics of being filled repeatedly.
The method that the cathodic protection potential detection device measurement cathodic protection potential with the present embodiment is given below, such as Fig. 3
It is shown, comprising the following steps:
1) one is dug near the buried object of metal to be measured for filling the waste pit of cathodic protection potential detection device；
2) by cathodic protection potential detection device by cathodic protection test piece 2 and reference electrode 3 it is exposed upwardly in a manner of
It is embedded in waste pit, so that cathodic protection potential detection device and the buried object of metal to be measured are under identical working environment, and
Guarantee that cathodic protection test piece 2, reference electrode 3 well contact for a long time with the covering on its surface；
3) cathodic protection test piece 2 is measured into gold to be measured by cathodic protection cable 9 and the buried object electrical communication of metal to be measured
Belong to the DC voltage between buried object and reference electrode 3 and flows through the DC current of cathodic protection test piece 2；
4) will exchange test piece 4 by ac cable 8 and metal buried object electrical communication when, measure the buried object of metal to be measured with
Alternating voltage between reference electrode 3 with flow through the alternating current for exchanging 4 test pieces；
Above-mentioned steps 3) and the sequence of step 4) can be interchanged.
The test method of the detection buried object cathodic protection potential of metal of the utility model, by visiting cathodic protection potential
The cathodic protection test piece of survey device, reference electrode are embedded near the buried object of metal to be measured in a manner of far from the earth's core, so that cathode
Protection potential detection device and the buried object of metal to be measured are under identical working environment；Due to cathodic protection test piece, reference electricity
Pole is remotely felt at ease dress, therefore even if under because of rain drop erosion, earth's surface free settling the effects of, cathodic protection test piece, reference electricity
Pole still can well be contacted with soil, therefore can be filled for a long time, and can accurately measure the true of the buried object of metal for a long time
Polarization potential；Cathodic protection potential detection device Acceptable life is long after primary landfill, avoids repeating to fill, extends cathode and protect
The service life of protection unit, uses manpower and material resources sparingly, and is easy to implement the long-range monitoring of cathodic protection potential.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (6)
1. a kind of cathodic protection potential detection device, including probe insulation shell (1), cathodic protection test piece (2) and reference electrode
(3), it is characterised in that；
The probe insulation shell (1) is the cavity of inner hollow, is filled with filler material (6) in cavity, the cathodic protection examination
Piece (2), reference electrode (3) are embedded on the roof of probe insulation shell (1), and cathodic protection test piece (2), reference electrode
(3) top is concordant with the outside of the roof；
The cathodic protection test piece (2) is closed annular, and the reference electrode (3) is located at the encirclement of cathodic protection test piece (2)
Among.
2. a kind of cathodic protection potential detection device according to claim 1, which is characterized in that it further include multi-cable,
The roof of the probe insulation shell (1) is equipped with the threading hole (5) passed through for the multi-cable, which is located at
The outside of cathodic protection test piece (2)；
The multi-cable includes cathodic protection cable (9), reference cable (10), one end of the cathodic protection cable (9) with
Cathodic protection test piece (2) connection, one end of reference cable (10) is connect with cathodic protection test piece (2)；Cathodic protection cable (9) and
The other end of reference cable (10) is pierced by the probe insulation shell (1) from the threading hole (5).
3. a kind of cathodic protection potential detection device according to claim 1 or 2, which is characterized in that the filler material (6)
For low-impedance solid filler material.
4. a kind of cathodic protection potential detection device according to claim 3, which is characterized in that the solid filler material is
Bentonite.
5. a kind of cathodic protection potential detection device according to claim 3, which is characterized in that the probe insulation shell
(1) it adopts and is made from an insulative material, the insulating materials is polyvinyl chloride or polytetrafluoroethylene (PTFE).
6. a kind of cathodic protection potential detection device according to claim 2, which is characterized in that further include ac cable
(8) be embedded exchanging test piece (4) on the roof, the exchange test piece (4) is located at cathodic protection test piece (2) side
And it is concordant with the roof；
Described ac cable (8) one end is connect with exchange test piece (4), and the other end is pierced by the probe absolutely from the threading hole (5)
Edge shell (1).
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| CN201821266867.1U CN208762578U (en) | 2018-08-07 | 2018-08-07 | A kind of cathodic protection potential detection device |
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| CN201821266867.1U CN208762578U (en) | 2018-08-07 | 2018-08-07 | A kind of cathodic protection potential detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108754504A (en) * | 2018-08-07 | 2018-11-06 | 西安英柯迈信息技术有限公司 | A kind of cathodic protection potential detection device and its test method |
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- 2018-08-07 CN CN201821266867.1U patent/CN208762578U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108754504A (en) * | 2018-08-07 | 2018-11-06 | 西安英柯迈信息技术有限公司 | A kind of cathodic protection potential detection device and its test method |
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