CN105506645A - Anticorrosion device and anticorrosion method of ground wire - Google Patents
Anticorrosion device and anticorrosion method of ground wire Download PDFInfo
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- CN105506645A CN105506645A CN201410497946.3A CN201410497946A CN105506645A CN 105506645 A CN105506645 A CN 105506645A CN 201410497946 A CN201410497946 A CN 201410497946A CN 105506645 A CN105506645 A CN 105506645A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005260 corrosion Methods 0.000 claims abstract description 44
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- 239000004568 cement Substances 0.000 claims abstract description 28
- 238000009413 insulation Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000012806 monitoring device Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract description 4
- 238000010248 power generation Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 230000003245 working effect Effects 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 3
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- 229910052760 oxygen Inorganic materials 0.000 description 3
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- 230000001681 protective effect Effects 0.000 description 3
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- 238000009434 installation Methods 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
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- Prevention Of Electric Corrosion (AREA)
Abstract
Belonging to the field of power transmission and transformation, the invention relates to an anticorrosion device and anticorrosion method of a ground wire. The anticorrosion device comprises a ground lead, the periphery of the ground lead's vertical lead is covered with an insulating layer, the periphery of a horizontal lead and the peripheries of branch leads are covered with a conductive cement layer, the ground lead is provided with the negative pole of an additional direct current power supply, the additional direct current power supply is photovoltaic power generation component, the positive pole of the additional direct current power supply is connected to an auxiliary electrode, the ground lead is connected to a sensor, the sensor is in connection with a ground monitor, and the monitor is also connected to a reference electrode. According to the invention, the corrosion degree of the ground wire is alleviated, the corrosion resistance of the ground wire is improved, and the service life of the ground wire is prolonged.
Description
Technical field
The present invention relates to a kind of corrosion-resisting device and anti-corrosion method, particularly a kind of corrosion-resisting device of grounding wire and anti-corrosion method, belong to power transmission and transformation field.
Background technology
Ground connection for electric installation has working grounding, grounding for lightening, protective ground etc., guarantee life safety, the important measures of device security and whole electric equipment system safety, if grounding connection is bad, not only can cause the damage of electric installation, and buildings can be caused to catch fire, cause casualties, What is more can cause chain accident, spot fire is caused as gas leakage can be caused, equipment power failure generation personnel are caused to injure by a crashing object, in the connection of building roof bad meeting triggered lightning accident, the particularly ground net of some power regulation station, along with increasing of power transmission and transformation pressure in recent years, the ground connection of the electrical equipments such as substation is particularly important, although the ratio that ground path occupies for whole electrical network cost is quite little, but, play a part very great wherein, because grounding wire is embedded in underground, underground humidity can be subject to, temperature, the impact of each side such as soil constituent, directly affect the life-span of ground-electrode, containing the composition that number acid basicity is strong in some places soil, corrosion can be caused to connecting wires, another one reason be electric wire on the ground with the boundary of underground, because the oxygen level on the ground and between underground is different, can because of the reason of oxygen concentration difference, wire over ground can as anode, underground cable forms a cell circuit as negative electrode and corrodes junction section, another is can because of electric leakage, cause the electrocorrosion of ground wire, this corrosion can be corroded ground wire in the short period of time fast, cause ground thread breakage sometimes, if this is the case, the consequence caused is very serious.For the corrosion condition of ground wire, all extremely be concerned about its life-span, but, underground is embedded in for a long time owing to connecting wires, ground wire can also continue work-ing life how long actually, do not excavate and cannot grasp, China is vast in territory, in the soil of various places, the amount of chemical composition is different, even the amount of the chemical composition of soil of areal is also not quite similar, also be difficult to grasp universal law, how could grasp electrode corrosion situation, for relevant industries, particularly power transmission and transformation industry is a very important thing, once because ground connection has an accident, great accident can be caused, so be the thing that can not adopt a casual attitude.Ground wire anticorrosive work is a very important job, carry out except rotproofing except utilizing coating to ground wire surface, additive method protection must be utilized, electro-chemical protection technology is one of them method, and utilize electrochemical method to serve good effect in prolongation ground wire work-ing life, one of them method, utilize impressed current to provide the method for Cathode DC electric current to ground wire or ground net, by burying a kind of supporting electrode pole underground, utilize electrochemical principle, power supply is provided to negative electrode, this power supply needs to utilize constant potential to control, this ground wire protection method reduces the current potential of metal earth, reach cathode electrode polarization, thus reduce the corrosion speed of ground wire, the work-ing life of extending wire.
Summary of the invention
Bury that soil humidity is large underground for ground wire, acid-basicity corrosion ground wire problem, ground and bury soil partial electro chemical corrosion phenomenon underground, ground wire corrodes and cannot monitor problem, the invention provides a kind of corrosion-resisting device and anti-corrosion method of grounding wire, its object is exactly to slow down grounding wire extent of corrosion, improve the erosion resistance of grounding wire, add the work-ing life extending grounding wire.
The technical scheme of the invention of being somebody's turn to do is a kind of corrosion-resisting device and anti-corrosion method of grounding wire, comprise grounded transmitting wire, described grounded transmitting wire comprises vertical wires, the horizontal wire be connected with vertical wires, the multiple offsets laid in the horizontal plane by certain angle with horizontal wire, the vertical wires periphery of grounded transmitting wire is coated with insulation layer, described horizontal wire and offset periphery are coated with electroconductibility cement layer, described grounded transmitting wire is provided with the negative pole of external dc power supply, external dc power supply is photovoltaic electrification component, the positive pole of applying direct current is connected on a supporting electrode, described grounded transmitting wire is connected with sensor, sensor and ground monitoring device, constant potential controller is connected, monitor is also connected to a reference electrode, the insulation layer 5-30cm above ground level of the covering of described vertical wires, the insulation layer of described covering uses heat-shrinkage material, the metal active of described supporting electrode is higher than grounded transmitting wire material, the end of described inclination wire is tip-shape.
The technical solution used in the present invention is, a kind of corrosion-resisting device of grounding wire, comprise grounded transmitting wire, it is characterized in that: described grounded transmitting wire comprises vertical wires, the horizontal wire be connected with vertical wires, the multiple offsets laid in the horizontal plane by certain angle with horizontal wire, the vertical wires periphery of grounded transmitting wire is coated with insulation layer, described horizontal wire and offset periphery are coated with electroconductibility cement layer, described grounded transmitting wire is provided with the negative pole of external dc power supply, external dc power supply is photovoltaic electrification component, the positive pole of applying direct current is connected on a supporting electrode, described grounded transmitting wire is connected with sensor, sensor and ground monitoring device, constant potential controller is connected, monitor is also connected to a reference electrode.
A kind of anti-corrosion method of grounding wire, comprise grounded transmitting wire, it is characterized in that: described grounded transmitting wire comprises vertical wires, the horizontal wire be connected with vertical wires, the multiple offsets laid in the horizontal plane by certain angle with horizontal wire, the vertical wires periphery of grounded transmitting wire is coated with insulation layer, described horizontal wire and offset periphery are coated with electroconductibility cement layer, described grounded transmitting wire is provided with the negative pole of external dc power supply, external dc power supply is photovoltaic electrification component, the positive pole of applying direct current is connected on a supporting electrode, described grounded transmitting wire is connected with sensor, sensor and ground monitoring device, potentiostat is connected, monitor is also connected to a reference electrode, it is characterized in that: described anti-corrosion method is by following realization,
When A. laying horizontal wire, one deck powdery electroconductive cement is laid under horizontal wire, then horizontal wire and inclination wire are set on powdery electroconductive cement, at covering powdery electroconductive cement on horizontal wire and inclination wire, utilize the insulation layer heating that heating blower will cover in vertical wires, insulation layer is shunk, after connecting additional power source negative pole and sensor, covers wire;
B. by an additional direct supply and supporting electrode, make to define a corrosion cell between grounded transmitting wire and supporting electrode, make grounded transmitting wire become negative electrode, grounded transmitting wire defines plentiful electronics, and electrode is polarized, prevents the corrosion of electrode;
C. by monitoring the electric current of grounded transmitting wire, the potential value of grounded transmitting wire is made to be less than the current potential of reference electrode;
The thickness of the powdery electroconductive cement of described grounded transmitting wire top and bottom is at more than 20mm, and the current potential of described grounded transmitting wire is greater than take-off potential, is at least greater than 0.1V.
The positively effect that the corrosion-resisting device of this grounding wire and anti-corrosion method have to completely cut off the corrosion of soil moisture to grounded transmitting wire; and pass through external dc power supply; anode in electrochemical principle original on grounded transmitting wire can be transformed into negative electrode; protect the corrosion of grounded transmitting wire; extend the birthday noodle of grounded transmitting wire; and effectively can monitor ground wire, overcome in the past to the inexplicit state of grounded transmitting wire etch state, achieve effective monitoring.
Accompanying drawing explanation
fig. 1enforcement schematic diagram of the present invention.
Embodiment
Be described with regard to the specific embodiment of the present invention referring to Fig. 1, in figure, 100: grounded transmitting wire, 101a vertical wires, 101b: horizontal wire, 101c: offset, 102: electroconductive cement, 103a: underground heat shrinks insulation layer, 103b: heat shrinkage insulation layer, 200 on the ground: supplementary anode, 300: reference electrode, 400: constant potential controller, 401: monitor, 500: photo-voltaic power supply, 501: photovoltaic module, 502: photovoltaic controller, 503: photosensitively to open the light, 504: store battery.
As previously mentioned, galvanic corrosion is the major cause causing grounding device corrosion.Galvanic corrosion is main relevant with ionogen (in soil) oxide concentration, and the concentration of H+ and O2 in electrolyte solution is larger, and galvanic corrosion speed is faster.Grounded transmitting wire is embedded in underground, due to galvanic corrosion, the work-ing life of grounded transmitting wire can be reduced, Fig. 1 is one of the present invention and implements example, in order to prevent the galvanic corrosion of grounding wire wire 100, in this enforcement example, have employed a supplementary anode 200, buried reference electrode 300 underground simultaneously, the main purpose of reference electrode is the electric current benchmark of contrast grounded transmitting wire, be convenient to carry out size to ground connection current in wire determine, control, profit in this way, can control size of current, additional power source is made to flow into electronics to ground connection conduction, the activity of the electrode that described supplementary anode 200 adopts is greater than the metallic substance activity of grounded transmitting wire, described grounded transmitting wire is connected with sensor, sensor is connected with ground constant potential controller 400 and monitor 401, from monitor 401, one sees the grounded transmitting wire current conditions that sensor transmits, thus can judge that grounded transmitting wire 100 belongs to conduction status, can monitor the electric current of wire, external dc power supply is accessed at grounded transmitting wire 100, in the present invention, external dc power supply make use of photo-voltaic power supply, this power supply can eliminate the transformer used in prior art, and it is more stable, the positive pole of direct supply is connected to the positive pole of supporting electrode 200, grounded transmitting wire 100 is connected on the negative pole of external dc power supply, after connecting additional power source, supporting electrode 200 can make the current potential of original grounded transmitting wire 100 reduce, make electronegative stream of electrons to grounded transmitting wire, the originally disappearing anode of corrosion grounded transmitting wire, grounded transmitting wire 100 becomes negative electrode from original anode, as the supporting electrode of anode, reduce the ion in grounded transmitting wire, the corrosion to grounded transmitting wire 100 can be prevented.Described photo-voltaic power supply 500 is made up of photovoltaic module 501, controller 502 and store battery 503, between photovoltaic module 501 and store battery 503, make use of light activated switch 503, when sunlight is sufficient, utilize photovoltaic module directly to be powered to grounded transmitting wire 100 by constant potential controller 400, unnecessary electricity is stored in store battery, in order to overcast and rainy use, once occur overcast and rainy, light activated switch will open store battery 504 switch automatically, powers to grounded transmitting wire 100 with store battery 504.
In order to can protective ground wire further, outside the vertical wires 101a of grounded transmitting wire in the present invention, make use of a kind of insulating material, as previously mentioned, at the ground of existing grounded transmitting wire 100 and the intersection of underground due to electrochemical principle, the corrosion of interface location is quite serious, in order to prevent the corrosion of vertical wires 100 part, at over-ground part or the underground part of vertical wires 101a, make use of insulating layer material respectively, namely underground heat shrinks insulation layer 103a, heat shrinkage insulation layer 103b on the ground, in order to ensure that insulation layer 103a is not corroded on the ground, generally want certain height above ground level, general at 5-30cm, if lower than 5cm, easily enter water from top, strengthen extent of corrosion, higher than the words of 30cm, insulation layer can be destroyed because of various factors on the contrary, in this enforcement example, insulation layer have employed heat shrinkage insulation material, when constructing, the method of blowing heating can be utilized, insulating material is shunk, tightly be strapped on vertical wires 101a, prevent from or reduce oxygen and water etc. entering, the effect reducing corrosion grounded transmitting wire 100 can be played, vertical wires obtains protection, in grounded transmitting wire, not only there is vertical wires 101a, generally to form a ground networks in underground, in this enforcement example, there is horizontal wire 101b, described horizontal wire 101b buries underground in process in enforcement, the electroconductive cement 102 of certain thickness powdery has been laid below horizontal wire, why powdery electroconductive cement 102 uses dry powdery electroconductive cement to be to absorb the moisture contained in ground, through after a period of time, this cement will condense, the thickness of the powdery electroconductive cement of the horizontal wire top and bottom of described grounded transmitting wire is at more than 20mm, except absorbing the moisture in soil, intensity can also be increased.According to actual measurement polarization data, if negative electrode uses and the current potential of described grounded transmitting wire is greater than take-off potential, be at least greater than 0.1V, be only greater than this numerical value, just can be protected grounded transmitting wire 100.Same principle, also lid layer electroconductive cement on the horizontal wire 101b of grounded transmitting wire, so both protect the corrosion of grounded transmitting wire 100, can not be corroded again, the cement of one deck level of protection wire at least will be covered around wire, like this, will around grounded transmitting wire, define one moisture shielding, reduce the extent of corrosion of grounded transmitting wire, in order to reduce extent of corrosion further, around horizontal wire 101b, certain angle is provided with multiple offset 101c, this offset 101c, the ground end of this offset 101c, in most advanced and sophisticated state, this structure has to utilize discharges.Equally, electroconductive cement powder is set around offset 101c, the extent of corrosion of offset can be reduced.
Branch's grounded transmitting wire is used in this enforcement example, certainly, arranging that vertical wires is same in the horizontal plane with horizontal wire also can the method utilizing electroconductive cement powder to protect described in practical this enforcement example, although use electroconductive cement powder in this enforcement example, if utilize electroconductive cement mud or concrete can play protective effect equally, just with comparing in this enforcement example, weak effect is a little, this utilize the mud of electroconductive cement or utilize electroconductive cement to do concrete also belong to technology category of the present invention.
Utilize aforesaid method can not only completely cut off the corrosion of soil moisture to grounded transmitting wire; and pass through external dc power supply; anode in electrochemical principle original on grounded transmitting wire can be transformed into negative electrode; protect the corrosion of grounded transmitting wire; extend the birthday noodle of grounded transmitting wire; and effectively can monitor ground wire, overcome in the past to the inexplicit state of grounded transmitting wire etch state, achieve effective monitoring.
Claims (7)
1. the corrosion-resisting device of a grounding wire, comprise grounded transmitting wire, it is characterized in that: described grounded transmitting wire comprises vertical wires, the horizontal wire be connected with vertical wires, the multiple offsets laid in the horizontal plane by certain angle with horizontal wire, the vertical wires periphery of grounded transmitting wire is coated with insulation layer, described horizontal wire and offset periphery are coated with electroconductibility cement layer, described grounded transmitting wire is provided with the negative pole of external dc power supply, external dc power supply is photovoltaic electrification component, the positive pole of applying direct current is connected on a supporting electrode, described grounded transmitting wire is connected with sensor, sensor and ground monitoring device, constant potential controller is connected, monitor is also connected to a reference electrode.
2. the corrosion-resisting device of a kind of grounding wire according to claim 1, is characterized in that: the insulation layer 5-30cm above ground level of the covering of described vertical wires, and the insulation layer of described covering uses heat-shrinkage material.
3. the corrosion-resisting device of a kind of grounding wire according to claim 1, is characterized in that: the metal active of described supporting electrode is higher than grounded transmitting wire material.
4. the corrosion-resisting device of a kind of grounding wire according to claim 1, is characterized in that: the end of described offset is tip-shape.
5. the corrosion-resisting device of a kind of grounding wire according to claim 1, is characterized in that: be provided with light activated switch between described constant potential controller and photo-voltaic power supply.
6. the anti-corrosion method of a grounding wire, comprise grounded transmitting wire, it is characterized in that: described grounded transmitting wire comprises vertical wires, the horizontal wire be connected with vertical wires, the multiple offsets laid in the horizontal plane by certain angle with horizontal wire, the vertical wires periphery of grounded transmitting wire is coated with insulation layer, described horizontal wire and offset periphery are coated with electroconductibility cement layer, described grounded transmitting wire is provided with the negative pole of external dc power supply, external dc power supply is photovoltaic electrification component, the positive pole of applying direct current is connected on a supporting electrode, described grounded transmitting wire is connected with sensor, sensor and ground monitoring device, potentiostat is connected, monitor is also connected to a reference electrode, it is characterized in that: described anti-corrosion method is by following realization,
When A. laying horizontal wire, one deck powdery electroconductive cement is laid under horizontal wire, then horizontal wire and inclination wire are set on powdery electroconductive cement, at covering powdery electroconductive cement on horizontal wire and inclination wire, utilize the insulation layer heating that heating blower will cover in vertical wires, insulation layer is shunk, after connecting additional power source negative pole and sensor, covers wire;
B. by an additional direct supply and supporting electrode, make to define a corrosion cell between grounded transmitting wire and supporting electrode, make grounded transmitting wire become negative electrode, grounded transmitting wire defines plentiful electronics, and electrode is polarized, prevents the corrosion of electrode;
C. by monitoring the electric current of grounded transmitting wire, the potential value of grounded transmitting wire is made to be less than the current potential of reference electrode.
7. the anti-corrosion method of a kind of grounding wire according to claim 6, is characterized in that: the thickness of the powdery electroconductive cement on described grounded transmitting wire is at more than 20mm.
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| CN201410497946.3A CN105506645A (en) | 2014-09-26 | 2014-09-26 | Anticorrosion device and anticorrosion method of ground wire |
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| CN201410497946.3A CN105506645A (en) | 2014-09-26 | 2014-09-26 | Anticorrosion device and anticorrosion method of ground wire |
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| CN108425120A (en) * | 2018-02-11 | 2018-08-21 | 青岛海尔智能技术研发有限公司 | Water storage type water heater anticorrosion device, control method and water heater |
| CN109738752A (en) * | 2018-11-13 | 2019-05-10 | 杭州意能电力技术有限公司 | A kind of fast imaging method for grounded screen maintenance |
| CN112502757A (en) * | 2020-12-15 | 2021-03-16 | 山东科技大学 | Corrosion protection and on-site corrosion monitoring method and device for anchor rod support system |
| CN114350188A (en) * | 2021-12-14 | 2022-04-15 | 青岛理工大学 | Energy storage protection cement-based micro-change monitoring coating and cement-based sensor for strain monitoring of existing buildings |
| CN116260063A (en) * | 2023-01-05 | 2023-06-13 | 广西电网有限责任公司电力科学研究院 | A method and system for treating corrosion of a substation in service connected to a power grid |
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| CN112502757A (en) * | 2020-12-15 | 2021-03-16 | 山东科技大学 | Corrosion protection and on-site corrosion monitoring method and device for anchor rod support system |
| CN114350188A (en) * | 2021-12-14 | 2022-04-15 | 青岛理工大学 | Energy storage protection cement-based micro-change monitoring coating and cement-based sensor for strain monitoring of existing buildings |
| CN114350188B (en) * | 2021-12-14 | 2023-01-03 | 青岛理工大学 | Energy storage protection type cement-based micro-variation monitoring coating for existing building strain monitoring and cement-based sensor |
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| CN116260063A (en) * | 2023-01-05 | 2023-06-13 | 广西电网有限责任公司电力科学研究院 | A method and system for treating corrosion of a substation in service connected to a power grid |
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