CN104729984B - A kind of ground net corrosion combined monitoring sensor - Google Patents
A kind of ground net corrosion combined monitoring sensor Download PDFInfo
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- CN104729984B CN104729984B CN201510129791.2A CN201510129791A CN104729984B CN 104729984 B CN104729984 B CN 104729984B CN 201510129791 A CN201510129791 A CN 201510129791A CN 104729984 B CN104729984 B CN 104729984B
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Abstract
The invention discloses a kind of ground net corrosion combined monitoring sensor, it includes auxiliary electrode, ring protectiving electrode, solid reference electrode, stainless steel cylinder, stainless steel sleeve pipe；The auxiliary electrode is fixed on stainless steel cylinder inwall, and the ring protectiving electrode is fixed on stainless steel cylinder outer wall, and the solid reference electrode is fixed in stainless steel cylinder by reference electrode retainer ring；The auxiliary electrode, ring protectiving electrode, solid reference electrode are drawn by single condctor respectively, and shielding teleflex is arranged with outside the single condctor；The shielding teleflex passes stainless steel sleeve pipe, and is sealed by water joint；The circumferencial direction of the stainless steel cylinder is provided with multiple through holes.The present invention can accurately measure ground net corrosion speed.
Description
Technical field
The present invention relates to transformer station grounding network on-line corrosion monitoring field, and in particular to a kind of compound prison of ground net corrosion
Survey sensor, the monitoring for ground net corrosion speed.
Background technology
Corrosion of the grounded screen in soil belongs to electrochemical corrosion, can carry out corrosion prison using a variety of electrochemical methods
Survey, including linear polarization method, condition of constant Current step method and AC impedence method etc..However, current most of monitoring methods be required to it is pre-
Metal testing plate is buried in soil, i.e., can only measure the corrosivity of soil, can not the direct measurement earth mat corrosion rate of itself.Such as
Fruit as the working electrode in activation polarization, then must will come from tested earth mat metallic object to polarization of electrode current limit
In certain area, i.e., corrosion sensor need to limit polarization current in the agreement area of earth mat metal surface, otherwise, be polarized gold
The uncertainty of possession web area, it will cause the corrosion rate of measurement to produce larger error, measurement result is inaccurate.
Such as Publication No. 101315403, publication date is on December 3rd, 2008, and patent name is a kind of ground net corrosion
Aperture current limliting sensor is used in detection method and system, the auxiliary electrode for applying polarization to workpiece pole is enclosed in dielectric chamber
In, polarization current is flowed to grounded screen by aperture（Working electrode）, realize the limitation of grounded screen polarization area.So
And, aperture current limliting sensor in the patent is as a result of sealing structure, when aperture current limiter is pressed on into grounded screen steel plate
When upper, current limiter can be caused to be internally formed a closing " dead band ", its internal environment forms thing with sensor external environment
Reason isolation, as time went on, moisture, dissolved oxygen, microorganism and content of mineral substances of sensor internal soil etc. all can be because of
Inaccessible environment and the difference larger with external environment condition is presented.This is for medium-term and long-term corrosion monitoring, its corrosion rate measurement result
Reference significance will progressively be lost.In addition the current limiter and grounded screen can not realize it is seamless contact, necessarily there is portion of electrical current to lead to
Cross gap to scatter and disappear, cause the corrosion electric current density increase of measurement, corrosion rate measured value is much larger than actual value.
Therefore, we are in the urgent need to a kind of new ground net corrosion combined monitoring sensor, accurately to measure grounded screen
Corrosion rate.
The content of the invention
The ground net corrosion combined monitoring of ground net corrosion speed can be accurately measured it is an object of the invention to provide a kind of
Sensor, is the ground net corrosion combined monitoring sensor of a kind of integrated aperture current limliting and ring protectiving electrode restriction of current technology.
The technical solution adopted by the present invention is：
A kind of ground net corrosion combined monitoring sensor, it includes auxiliary electrode, ring protectiving electrode, solid reference electrode, no
Rust steel cylinder, stainless steel sleeve pipe；
The auxiliary electrode is fixed on stainless steel cylinder inwall, and it is external that the ring protectiving electrode is fixed on stainless steel cylinder
Wall, the solid reference electrode is fixed in stainless steel cylinder by reference electrode retainer ring；
The auxiliary electrode, ring protectiving electrode, solid reference electrode are drawn by single condctor respectively, and the single condctor
It is arranged with shielding teleflex outside；The shielding teleflex passes stainless steel sleeve pipe, and is sealed by water joint；
The circumferencial direction of the stainless steel cylinder is provided with multiple through holes；
The hollow part of the bottom of the stainless steel cylinder is current limliting aperture.
By such scheme, the external diameter of the ring protectiving electrode is equal with the external diameter of stainless steel cylinder.
By such scheme, the center of the ring protectiving electrode and the center superposition of auxiliary electrode.
By such scheme, the auxiliary electrode, ring protectiving electrode are located at the middle and lower part of stainless steel cylinder.
By such scheme, the bottom of the stainless steel cylinder is gradually reduced tapered.
By such scheme, the internal diameter of the stainless steel cylinder is 10mm~30mm, the external diameter of the auxiliary electrode with not
The internal diameter of rust steel cylinder is identical, and the height of the auxiliary electrode is 10mm~20mm；The internal diameter of ring protectiving electrode is 40~50mm,
Highly it is 10mm~20mm.
The present invention is based on aperture current limiting technique, and the defined position that can be constrained in polarization current on grounded screen steel plate passes through
Retaining ring restriction of current circuit, is constrained the disperse electric current that aperture gap is flowed out, can more accurately measure the corrosion of grounded screen
Speed.The sensor is also acted on, Ji Jiangji in addition to the electrode measurement system of electrochemistry three is constituted with tested earth mat with current limit
Galvanic current is limited to sensor front end aperture in the perspective plane of ground net surface, is that this sensor employs aperture current limliting and shield
Two methods of ring electrode dissipate to constrain polarization current.Shielded tube is sealed by PG water joints, prevents moisture from penetrating into stainless
In steel cylinder.The hollow part of stainless steel cylinder bottom is current limliting aperture.Stainless steel cylinder circumferencial direction has multiple
Through hole, usually 4 ~ 8 through holes, the mass exchange for soil inside stainless steel cylinder and outside soil, it is ensured that inside and outside corruption
The uniformity of environment is lost, to ensure the accuracy of measurement.
Reference electrode in the present invention is the important devices in aperture current limliting electrode, is monitored for ground net corrosion, reference
There is higher requirement in terms of long-life, chemically-resistant pollution and the biodeterioration of electrode.Its interior reference of conventional reference electrode
Solution is often different from the composition of studied system solution, thus inevitably causes liquid potential, so as to produce error.And
And solution electrode is directly contacted with soil may produce cross staining, in addition also there are electrode structural designs in solution reference electrode
And the problem of mechanical seal.Soil environment and ooze easily block porous ceramics.Solid reference electrode without liquid potential,
Resistance to immersion, service life is long, relatively low to harsh use environment sensitiveness, scientific research and engineering using it is upper all show it is bright
Aobvious advantage.Therefore the reference electrode of the present invention uses solid reference electrode（Such as saturation copper/copper sulfate reference electrode, silver/chlorination
Silver electrode or saturation potassium chloride calomel electrode etc.）.
When this ground net corrosion combined monitoring sensor vertical is positioned on grounded screen steel bar, auxiliary electrode provides aperture
The steel plate polarization current on aperture perspective plane, and ring protectiving electrode then provides the current polarizing on the outside of aperture, can be with by such a design
Preferably by restriction of current in aperture, polarization current is limited in below auxiliary electrode projected area, available for grounded screen sheet
The accurate measurement of body corrosion rate.
The present invention is integrated based on aperture current limliting and retaining ring restriction of current technology, can be by polarization current exact constraint small
In bore region, thus measurement result is more accurate；The present invention is provided with the side of stainless steel cylinder is used for soil inside and outside sensor
The through hole of the ion exchange of earth, it is ensured that have good mass exchange between the soil and external environment condition in sensor, it is ensured that
The uniformity of sensor internal and external environment, thus its measurement result can more truly reflect Grounding Grid state.
Brief description of the drawings
Fig. 1 is the structural representation of ground net corrosion combined monitoring sensor of the present invention.
Fig. 2 illustrates for the restriction of current mode of the present invention.
In figure：1st, PG water joints；2nd, stainless steel sleeve pipe；3rd, teleflex is shielded；4th, solid reference electrode；5th, reference electrode
Retainer ring；6th, single condctor；7th, through hole；8th, stainless steel cylinder；9th, auxiliary electrode；10th, ring protectiving electrode；11st, aperture, 12, connect
Earth mat steel plate, 13, earth mat draws and reach the standard grade.
Embodiment
The present invention is described further below in conjunction with the accompanying drawings.
Embodiment 1
Referring to Fig. 1 and Fig. 2, a kind of ground net corrosion combined monitoring sensor, it includes auxiliary electrode（CE）9th, retaining ring electricity
Pole（GE）10th, solid reference electrode（RE）4th, stainless steel cylinder 8, stainless steel sleeve pipe 2；The internal diameter of the auxiliary electrode 9 is
10mm, highly it is that 10mm, external diameter are 14mm, is fixed on the inwall of stainless steel cylinder 8；The external diameter of the ring protectiving electrode 10 is
50mm, internal diameter be 40mm, be highly 12mm, is fixed on the outer wall of stainless steel cylinder 8, the solid reference electrode 4 it is a diameter of
8mm, highly be 135mm, be fixed on by reference electrode retainer ring 5 in stainless steel cylinder 8；The auxiliary electrode 9, retaining ring electricity
Pole 10, solid reference electrode 4 are drawn by single condctor 6 respectively, and shielding teleflex 3 is arranged with outside the single condctor 6；Institute
State shielding teleflex 3 and pass stainless steel sleeve pipe 2, and sealed by PG water joints 1；The circumference side of the stainless steel cylinder 8
4 through holes 7 are uniformly laid with upwards, the mass exchange for the inside soil of stainless steel cylinder 8 and outside soil, it is ensured that inside and outside
The uniformity of corrosive environment；The hollow part of the bottom of the stainless steel cylinder 8 is current limliting aperture 11.
Install and reduce for convenience influence of the external environment condition to test result, the external diameter of the auxiliary electrode 9 with it is stainless
The internal diameter of steel cylinder 8 is identical, and the external diameter of the ring protectiving electrode 10 is identical with the external diameter of stainless steel cylinder 8.
For the ease of installing for sensor, the bottom of stainless steel cylinder 8 can be designed to be gradually reduced tapered；For
Make test result accurate, by the center of ring protectiving electrode 10 and the center superposition of auxiliary electrode 9, by auxiliary electrode 9 and retaining ring electricity
Pole 10 is placed in the middle and lower part of stainless steel cylinder 8.
During in-site installation sensor, ground net corrosion combined monitoring sensor is inserted in on-site soil, and is vertically fixed
On grounded screen steel plate 12, referring to Fig. 2.Working electrode in the present invention is grounded screen steel plate 12, by drawing electricity of reaching the standard grade and work
Pole lead 13 is connected.Auxiliary electrode 9（CE）The polarization current of grounded screen steel plate 12 in the aperture perspective plane of aperture 11 will be provided.Due to
There can be certain gap between aperture and grounded screen steel plate 12（As earth mat is uneven or soil settlement is caused）, a part can be caused
Electric current is flowed to outside orifice region, if relying on aperture current limliting merely, the corrosion rate of measurement can be caused bigger than normal.Ring protectiving electrode
（GE）The restriction of current that the 10 about beam electronic currents provided can go out aperture disperse is also possible to prevent stainless steel in aperture perspective plane
Polarization current is exhaled in the through hole 7 of the side of cylinder 8；Finally, all electric currents for flowing to grounded screen are reached the standard grade and work by drawing
Make contact conductor（WE）Return in corrosion monitor, thus can more accurately measure ground net corrosion speed.Further, since aperture
A sealed system in 11, if aperture 11 be tightly fitted in the surface of grounded screen steel plate 12, hole soil can not with it is outer
Portion's soil loses material and heat exchange, forms in one isolated " dead band ", and such corrosion rate metering system is obvious not
The corrosion condition to grounded screen in outside soil dry-wet alternation procedure can be reflected.In order to avoid being internally formed dead band, it is necessary to not
The side-wall hole of rust steel cylinder, to ensure the mass exchange inside and outside hole.
Embodiment 2
With embodiment 1 except that：The external diameter of the auxiliary electrode is 16mm, is highly 14mm, the ring protectiving electrode
External diameter be 46mm, be highly 14mm, the solid reference electrode（RE）A diameter of 10mm, be highly 140mm.CE, GE and
RE is drawn by single condctor respectively, and three single condctors are drawn by shielding teleflex.The circumferencial direction of stainless steel cylinder
There are 6 through holes, be uniformly distributed on stainless steel cylinder, to ensure the uniformity of inside and outside corrosive environment.
The present invention can be according to on-site actual situations, and the size of adjustment sensor, including little Kong Zhi Jing ﹑ auxiliary electrode annulus are straight
The external diameter and sensor entire length of Jing ﹑ auxiliary electrode Gao Du ﹑ ring protectiving electrode Zhi Jing ﹑ ring protectiving electrode Gao Du ﹑ sensors.
Claims (6)
1. a kind of ground net corrosion combined monitoring sensor, it is characterised in that：It includes auxiliary electrode, ring protectiving electrode, solid ginseng
Than electrode, stainless steel cylinder, stainless steel sleeve pipe；
The auxiliary electrode is fixed on stainless steel cylinder inwall, and the ring protectiving electrode is fixed on stainless steel cylinder outer wall, institute
Solid reference electrode is stated to be fixed in stainless steel cylinder by reference electrode retainer ring；
The auxiliary electrode, ring protectiving electrode, solid reference electrode are drawn by single condctor respectively, and the single condctor overcoat
Provided with shielding teleflex；The shielding teleflex passes stainless steel sleeve pipe, and is sealed by water joint；
The circumferencial direction of the stainless steel cylinder is provided with multiple through holes；
The hollow part of stainless steel cylinder bottom is current limliting aperture.
2. ground net corrosion combined monitoring sensor as claimed in claim 1, it is characterised in that：The external diameter of the ring protectiving electrode
It is equal with the external diameter of stainless steel cylinder.
3. ground net corrosion combined monitoring sensor as claimed in claim 1 or 2, it is characterised in that：The ring protectiving electrode
Center and the center superposition of auxiliary electrode.
4. ground net corrosion combined monitoring sensor as claimed in claim 3, it is characterised in that：The auxiliary electrode, retaining ring
Electrode is located at the middle and lower part of stainless steel cylinder.
5. ground net corrosion combined monitoring sensor as claimed in claim 1, it is characterised in that：The stainless steel cylinder
Bottom is gradually reduced tapered.
6. ground net corrosion combined monitoring sensor as claimed in claim 1, it is characterised in that：The stainless steel cylinder
Internal diameter is 10mm~30mm, and the external diameter of the auxiliary electrode is identical with the internal diameter of stainless steel cylinder, the height of the auxiliary electrode
Spend for 10mm~20mm；The internal diameter of ring protectiving electrode is 40~50mm, is highly 10mm~20mm.
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| CN201510129791.2A CN104729984B (en) | 2015-03-24 | 2015-03-24 | A kind of ground net corrosion combined monitoring sensor |
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| CN113791030B (en) * | 2021-09-13 | 2024-05-31 | 国网山东省电力公司电力科学研究院 | In-situ detection sensor for soil corrosion of buried metal component |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101315403B (en) * | 2007-05-29 | 2010-12-01 | 华北电力科学研究院有限责任公司 | Ground net corrosion detection method and system |
| CN101299018B (en) * | 2007-09-24 | 2010-11-03 | 哈尔滨工业大学 | Complete solid-state beam current type reinforcing steel corrosion monitoring sensor and method for producing the same |
| JP5087503B2 (en) * | 2008-09-05 | 2012-12-05 | 川崎重工業株式会社 | Corrosion monitoring sensor |
| CN101943655B (en) * | 2010-08-16 | 2012-02-29 | 华中科技大学 | On-line corrosion detector for reinforced concrete and method thereof |
| CN103105355B (en) * | 2011-11-14 | 2015-11-25 | 华北电力科学研究院有限责任公司 | A kind of iron tower of power transmission line ground net corrosion detection method and device |
| CN103968972A (en) * | 2014-04-30 | 2014-08-06 | 歌尔声学股份有限公司 | Pressure sensor |
| CN104062350B (en) * | 2014-05-07 | 2017-04-19 | 西安交通大学 | Multi-electrode microsensor for detecting copper metal vapor concentration |
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Effective date of registration: 20160622 Address after: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Applicant after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Applicant after: Electric Power Research Institute of State Grid Shanxi Power Supply Company Address before: 430074 Hubei Province, Wuhan city Hongshan District Luoyu Road No. 143 Applicant before: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Applicant before: Electric Power Research Institute of State Grid Shanxi Power Supply Company Applicant before: State Grid Electric Power Research Insititute |
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