CN203960334U - For the cathodic protection system of buried pipeline - Google Patents
For the cathodic protection system of buried pipeline Download PDFInfo
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- CN203960334U CN203960334U CN201420323564.4U CN201420323564U CN203960334U CN 203960334 U CN203960334 U CN 203960334U CN 201420323564 U CN201420323564 U CN 201420323564U CN 203960334 U CN203960334 U CN 203960334U
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Abstract
The utility model discloses a kind of cathodic protection system for buried pipeline.This cathodic protection system that is used for buried pipeline comprises: galvanic protection power supply; Cathode cable, one end is connected to galvanic protection power supply, and the other end is used for being connected to buried pipeline; Flexible anode; And anode cable, one end is connected to galvanic protection power supply, and the other end is connected to flexible anode.By the utility model, solve cathodic protection system shorter problem in work-ing life in correlation technique.
Description
Technical field
The utility model relates to cathode protection technology field, in particular to a kind of cathodic protection system for buried pipeline.
Background technology
Along with the quickening of Urbanization in China, Urban Buried Gas Pipeline system is also set up more and more in different scales city.But, corrode because the buried gas pipeline of steel is very easily subject to the impact of the multiple environmental factorss such as soil, underground water, stray current, thereby it is usually among corrosion failure risk.Simultaneously because Urban Buried Gas Pipeline is in population and buildings compact district, and for delivery of inflammable and explosive Sweet natural gas, coal gas etc., once therefore there is leakage accident, will inevitably bring massive losses.
In correlation technique; mostly adopt the cathodic protection system of sacrificial anode to protect to Urban Buried Gas Pipeline; as shown in Figure 1; this cathodic protection system comprises cable 1 ' and sacrificial anode 2 '; wherein; one end of cable 1 ' is used for being connected to buried pipeline; its the other end is connected to sacrificial anode 2 '; this sacrificial anode 2 ' is for exporting stream of electrons to buried pipeline; the stream of electrons of this input is used for preventing buried pipeline loss electronics and corrodes; when use, this system is used for being embedded in below ground.But the cathodic protection system of sacrificial anode is shorter work-ing life, simultaneously due to the restriction of stake resistance, therefore electric current supply scarce capacity, thus make the galvanic protection poor effect for special sector pipelines such as through section pipelines.This is due to the environment that is in alternation of wetting and drying, and along with the propelling of time, the stream of electrons of sacrificial anode 2 ' output can decline gradually.
For cathodic protection system shorter problem in work-ing life in correlation technique, effective solution is not yet proposed at present.
Utility model content
Main purpose of the present utility model is to provide a kind of cathodic protection system for buried pipeline, to solve cathodic protection system shorter problem in work-ing life in correlation technique.
To achieve these goals, the utility model provides a kind of cathodic protection system for buried pipeline.This system comprises for the cathodic protection system of buried pipeline: galvanic protection power supply; Cathode cable, one end is connected to galvanic protection power supply, and the other end is used for being connected to buried pipeline; Flexible anode; And anode cable, one end is connected to galvanic protection power supply, and the other end is connected to flexible anode.
Further, galvanic protection power supply comprises: sun power potentiostat.
Further, sun power potentiostat comprises: cancellation module, be arranged in sun power potentiostat, and eliminate industrial frequency AC for negative and disturb.
Further, this cathodic protection system also comprises: cathodic protection station cable, and one end is connected to galvanic protection power supply, and the other end is connected to buried pipeline; Reference electrode; And reference electrode cable, one end is connected to galvanic protection power supply, and the other end is connected to reference electrode.
Further, this cathodic protection system also comprises: the diameter of the cross section of reference electrode cable is less than the diameter of the cross section of cathode cable.
Further, flexible anode comprises MMO/Ti flexible anode.
Further, flexible anode comprises conductive polymers flexible anode.
Further, interval predeterminable range between flexible anode and buried pipeline.
Further, buried pipeline comprises gas pipeline, water supply pipe and oil pipeline.
Further, buried pipeline comprises and passes through formula buried pipeline.
By the utility model, adopt galvanic protection power supply; Cathode cable, one end is connected to described galvanic protection power supply, and the other end is used for being connected to buried pipeline; Flexible anode; And anode cable, one end is connected to described galvanic protection power supply, and the other end is connected to described flexible anode, has solved cathodic protection system shorter problem in work-ing life in correlation technique, and then has reached the effect of the long service life of cathodic protection system.
Brief description of the drawings
The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is according to the schematic diagram of the cathodic protection system of the sacrificial anode of correlation technique;
Fig. 2 is according to the schematic diagram of the cathodic protection system for buried pipeline of the utility model embodiment;
Fig. 3 is according to the schematic diagram of the cathodic protection system for buried pipeline of the utility model preferred embodiment; And
Fig. 4 is according to the schematic diagram of the cathodic protection system for buried pipeline of the another preferred embodiment of the utility model.
Embodiment
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
In order to make those skilled in the art better understand the utility model scheme, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the embodiment of the utility model part, instead of whole embodiment.Based on the embodiment in the utility model, do not make the every other embodiment obtaining under creative work prerequisite those of ordinary skill in the art, all should belong to protection domain of the present utility model.
It should be noted that, the term in specification sheets of the present utility model and claims " comprises " and " having " and their any distortion, is intended to be to cover not exclusive comprising.
According to embodiment of the present utility model; a kind of cathodic protection system for buried pipeline is provided; this cathodic protection system that is used for buried pipeline is for the protection of urban buried pipeline; prevent that urban buried pipeline is because corrosion produces perforation; thereby reduce and circulate in ducted medium (as oil; Sweet natural gas, coal gas, water etc.) risk of leakage.
Fig. 2 is according to the schematic diagram of the cathodic protection system for buried pipeline of the utility model embodiment.
As shown in Figure 2, this cathodic protection system that is used for buried pipeline comprises: galvanic protection power supply 10, cathode cable 20, flexible anode 30 and anode cable 40.
It should be noted that, galvanic protection effect refers to when metal-electrolyte dissolution corrosion system is subject to cathodic polarization, and current potential is negative to be moved, and anodic metal oxide reaction overpotential reduces, and speed of response reduces, thereby metallic corrosion speed reduces.The protection that utilizes galvanic protection effect to alleviate metal equipment corrosion is called galvanic protection.
Galvanic protection power supply 10 is used to this cathodic protection system that the energy is provided, and wherein, galvanic protection power supply 10 can be the Miniature Power Unit of magnitude of voltage between 3-5V, or according to requirement of engineering, the magnitude of voltage of galvanic protection power supply 10 can be also other values.Galvanic protection power supply 10 can be direct supply, and the negative pole of this direct supply is connected to cathode cable 20, and its positive pole is connected to anode cable 40.It should be noted that, galvanic protection power supply 10 can be conventional cathode protection power source, can be also novel galvanic protection power supply, and for example this novel galvanic protection power supply can be environmental protection, clean galvanic protection power supply.
One end of cathode cable 20 is connected to galvanic protection power supply 10, and wherein, this end of cathode cable 20 is connected to the negative pole of galvanic protection power supply 10, and these cathode cable 20 the other ends are connected to buried pipeline.Buried pipeline can be steel buried pipeline, and buried pipeline can be for as transport gas, coal gas, oil and tap water etc.Environment is set can comprises multiple of buried pipeline.Such as buried pipeline can be along road or river course, the edge in lake etc. is laid on below ground, and it can also jaywalk, river course and lake etc. are laid on below ground.
Flexible anode 30 in use, can be embedded in below ground, and lays along buried pipeline, and its one end is connected to anode cable 40.Flexible anode 30 is used to buried pipeline output stream of electrons, and this stream of electrons is used for inputting buried pipeline and corrodes to prevent it from losing electronics.Be evenly distributed because flexible anode has protection potential, drainage density is large, therefore its have advantages of long service life and reliability high, reached the effect that long-term protection buried pipeline is avoided corrosion.
One end of anode cable 40 is connected to galvanic protection power supply 10, and wherein, this end of anode cable 40 is connected to the positive pole of galvanic protection power supply 10, and the other end of this anode cable 40 is connected to flexible anode 30.The material of anode cable 40 and cathode cable 20 can be identical with specification, and for example, its material can be copper.
By the utility model embodiment; the cathodic protection system that adopts galvanic protection power supply 10 and flexible anode 30 to combine; overcome the lower shortcoming in work-ing life of consumption-type material anode, can protect for a long time buried pipeline not to be corroded, reached the effect of controlling corrosion leakage risk.Its principle is, passes into electronics by external circuit to metal, required for depolarizer reduction reaction, thereby burning reaction (betatopic reaction) is suppressed.In the time that burning speed of response is reduced to zero, only there is depolarizer cathodic reaction in metallic surface.The shown cathodic protection system of the utility model embodiment; especially to the buried pipeline that passes through large-scale highway or river section that is difficult to closely detect; because such buried pipeline is in specific location; once therefore it is due to the corrosion damage of boring a hole; by unrepairable, or reparation need to spend huge cost.Simultaneously; these sections; because being often easy to cause the damaged area of preservative coat of through section pipeline, the form of construction work of passing through strengthens; thereby; the electric current demand of galvanic protection is also larger, and cathodic protection current that the galvanic protection scheme of traditional sacrificial anode and remote groundbed galvanic protection scheme are difficult to provide enough is to improve the work-ing life of system.Like this, in these specific locations, use this cathodic protection system in utility model embodiment, can extend the working life of buried pipeline, improve the validity of galvanic protection, suppress the generation of corrosion leakage, and then reduce the wasting of resources, and economize on the use of funds for enterprise.
It should be noted that, the cathodic protection system in the utility model embodiment is impressed current cathodic protection system.Wherein, impressed current cathodic protection is by external dc power supply and supplementary anode, forces stream of electrons from soil, to flow to protected metal, makes protected metal construction current potential lower than surrounding environment.Which can be for the protection of metal construction large-scale or in high soil resistivity soil, as long defeated buried pipeline, large tank group etc.
In the utility model embodiment, as shown in Figure 3, preferably, galvanic protection power supply 10 can comprise sun power potentiostat 101.It should be noted that; the clean energy that sun power potentiostat 101 is environment-friendly type; adopt the not only environment-protecting clean of clean energy of this environment-friendly type; and it can solve the Dependence Problem of traditional galvanic protection power supply 10 to power supply system; thereby simplify cathodic protection system; make the miniaturization more of this cathodic protection system, range of application is more extensive, its mounting arrangements flexibility more.
In the utility model embodiment, sun power potentiostat 101 can comprise: cancellation module.This cancellation module can be arranged on sun power potentiostat 101 inside, and this cancellation module can be eliminated industrial frequency AC interference, the protection effect of optimized cathode securing system for negative.
Fig. 4 is according to the schematic diagram of the cathodic protection system for buried pipeline of the another preferred embodiment of the utility model.
As shown in Figure 4; this embodiment can be used as the preferred implementation of above-described embodiment; the cathodic protection system for buried pipeline of this embodiment, except comprising sun power potentiostat 101, cathode cable 20, flexible anode 30 and the anode cable 40 of above-described embodiment, also comprises cathodic protection station cable 50, reference electrode 60 and reference electrode cable 70.
Identical with the first embodiment of the effect of sun power potentiostat 101, cathode cable 20, flexible anode 30 and anode cable 40, does not repeat them here.
One end of cathodic protection station cable 50 is connected to galvanic protection power supply 10, and particularly, this end of cathodic protection station cable 50 is connected to the negative pole of galvanic protection power supply 10, and these cathodic protection station cable 50 the other ends are connected to buried pipeline.Cathodic protection station cable 50 can be connected to cathode cable 20 same place of the tube wall of buried pipeline, but cathodic protection station cable 50 can not be same cable line with cathode cable 20.
Reference electrode 60 can be copper sulfate reference electrode, and it is connected to galvanic protection power supply 10 by reference electrode cable 70.If galvanic protection power supply 10 is sun power potentiostat 101, reference electrode 60 is connected to sun power potentiostat 101 by reference electrode cable 70.
One end of reference electrode cable 70 is connected to galvanic protection power supply 10, and its other end is connected to reference electrode 60.It should be noted that, the material of reference electrode cable 70 can be identical with the material of cathode cable 20 and anode cable 40, but its specification can be different from above-mentioned two kinds of cables.The diameter of conventional reference electrode cable 70 can be much smaller than the diameter of the diameter of cathode cable 20 and anode cable 40, for example, the diameter of general cathode cable 20 and the diameter of anode cable 40 can be 1X25mm2, and the diameter of reference electrode cable 70 can be 1X6mm2 or 1X10mm2.
The circuit structure that cathodic protection station cable 50 and reference electrode 60 and reference electrode cable 70 form can be for measuring the protection potential of galvanic protection; thereby the size that can regulate the voltage of galvanic protection power supply 10 (as sun power potentiostat 101) thinks that cathodic protection system provides enough potential differences; reach predetermined cathodic protection potential; and then make that flexible anode 30 is long-term inputs stream of electrons for buried pipeline; reach the effect that long-term protection buried pipeline is not corroded, finally reach the effect of controlling Sweet natural gas, coal gas, oil and tap water risk of leakage.
It should be noted that; in the time that power supply is galvanic protection power supply 10; in the embodiment shown in Figure 2; the all right cathodic protection station cable 50 of this cathodic protection system, reference electrode 60 and reference electrode cable 70; and the effect of above-mentioned 3 parts in this embodiment is identical with the effect in the embodiment of institute described in Fig. 4, does not repeat them here.
It should be noted that, in above-mentioned utility model embodiment, flexible anode 30 can comprise MMO/Ti flexible anode or conductive polymers flexible anode.MMO/Ti flexible anode has advantages of that as flexible anode of new generation protection potential is evenly distributed, drainage density is large, the life-span is long and reliability is high.These technical characterstics of flexible anode determine that it can effectively be applied to intensive pipe network galvanic protection, overcome traditional point-like anode system Potential distribution inequality, be easy to produce the problems such as interference, shielding.Be applied to the protection of buried pipeline outside, in realizing high reliability, also can reach all even long-life targets of Potential distribution.MMO/Ti flexible anode belongs to s-generation flexible anode; it combines flexible anode technology and MMO/Ti (titanium-based noble metal oxide compound) technical characterstic that anode row flow density is large, the life-span is long, has realized the technical superiority that flexible anode drainage density is large, the life-span long, protective current is evenly distributed, current efficiency is high.
Preferably, can interval predeterminable range between flexible anode 30 and buried pipeline.The value of this predeterminable range can be the caliber arbitrary value that is more than or equal to 3 times of buried pipelines.Further preferably, predeterminable range can equal the caliber of 3 times of buried pipelines.This be because, in use, flexible anode 30 be arranged on distance 3 times of buried pipelines caliber place time, the Potential distribution on buried pipeline is more even, thus the stream of electrons covering on buried pipeline is also the most even.And the stream of electrons covering is also more even, better to the protection effect of buried pipeline.If in use, when flexible anode 30 is arranged in the distance caliber of 3 times of buried pipelines, the Potential distribution on buried pipeline is inhomogeneous, thereby the stream of electrons covering on buried pipeline is also inhomogeneous.And the stream of electrons covering is also more inhomogeneous, more bad to the protection effect of buried pipeline.
It should be noted that, in the utility model embodiment, the applicable scene of this cathodic protection system can be buried pipeline, and buried pipeline can comprise gas pipeline, water supply pipe and oil pipeline etc.Preferably, buried pipeline can comprise and passes through formula buried pipeline.Like this, especially to being difficult to closely to detect and facilitating the buried pipeline that passes through large-scale highway or river section of repairing, because buried pipeline is like this in specific location, once therefore its due to the corrosion damage of boring a hole, by unrepairable, or reparation need to spend huge cost.Like this, in these specific locations, use this long cathodic protection system of life-span in utility model embodiment, can extend the working life of buried pipeline, and then reduce the wasting of resources, and economize on the use of funds for enterprise.
It should be noted that, in use, flexible anode 30 and the reference electrode 60 of this cathodic protection system can be laid on below ground.
As can be seen from the above description, the utility model has been realized following technique effect:
The cathodic protection system that adopts galvanic protection power supply 10 and flexible anode 30 to combine, has overcome the lower shortcoming in work-ing life of consumption-type material anode, can protect for a long time buried pipeline not to be corroded, and reaches the effect of controlling corrosion leakage risk.Especially to the buried pipeline that passes through large-scale highway or river section that is difficult to closely detect, because buried pipeline is like this in specific location, once therefore it is due to corrosion damages of boring a hole, by unrepairable, or reparation need to spend huge cost.Like this, in these specific locations, use this long cathodic protection system of life-span in utility model embodiment, can extend the working life of buried pipeline, and then reduce the wasting of resources, and economize on the use of funds for enterprise.
These are only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. for a cathodic protection system for buried pipeline, it is characterized in that, comprising:
Galvanic protection power supply;
Cathode cable, one end is connected to described galvanic protection power supply, and the other end is used for being connected to buried pipeline;
Flexible anode; And
Anode cable, one end is connected to described galvanic protection power supply, and the other end is connected to described flexible anode.
2. cathodic protection system according to claim 1, is characterized in that, described galvanic protection power supply comprises: sun power potentiostat.
3. cathodic protection system according to claim 2, is characterized in that, described sun power potentiostat comprises:
Cancellation module, is arranged in described sun power potentiostat, eliminates industrial frequency AC disturb for negative.
4. cathodic protection system according to claim 1 and 2, is characterized in that, also comprises:
Cathodic protection station cable, one end is connected to described galvanic protection power supply, and the other end is connected to described buried pipeline;
Reference electrode; And
Reference electrode cable, one end is connected to described galvanic protection power supply, and the other end is connected to described reference electrode.
5. cathodic protection system according to claim 4, is characterized in that, also comprises: the diameter of the cross section of described reference electrode cable is less than the diameter of the cross section of described cathode cable.
6. cathodic protection system according to claim 1, is characterized in that, described flexible anode comprises MMO/Ti flexible anode.
7. cathodic protection system according to claim 1, is characterized in that, described flexible anode comprises conductive polymers flexible anode.
8. cathodic protection system according to claim 1, is characterized in that, interval predeterminable range between described flexible anode and described buried pipeline.
9. cathodic protection system according to claim 1, is characterized in that, described buried pipeline comprises gas pipeline, water supply pipe and oil pipeline.
10. cathodic protection system according to claim 1, is characterized in that, described buried pipeline comprises and passes through formula buried pipeline.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104988512A (en) * | 2015-02-28 | 2015-10-21 | 中国石油大学(北京) | Cathode protection device and protection method thereof |
| CN105040000A (en) * | 2015-07-10 | 2015-11-11 | 中国民航大学 | Portable cathode protection device |
| CN105821418A (en) * | 2016-03-11 | 2016-08-03 | 张永新 | Dynamic outboard optical energy electronic activation anticorrosion device |
| CN107236960A (en) * | 2017-06-22 | 2017-10-10 | 中国石油化工股份有限公司 | A kind of impressed current cathode protection device for oil expeller |
| CN107419275A (en) * | 2017-08-01 | 2017-12-01 | 合肥威斯伏新材料有限公司 | A kind of pipeline anti-corrosive apparatus |
| CN108486576A (en) * | 2018-05-07 | 2018-09-04 | 北京碧海舟腐蚀防护工业股份有限公司 | flexible anode and detecting system |
| CN109023384A (en) * | 2017-06-09 | 2018-12-18 | 四川启昌管道工程有限责任公司 | A kind of novel convenient moveable cathodic protection skid mounted equipment |
| CN109917720A (en) * | 2019-04-04 | 2019-06-21 | 中国石油化工股份有限公司 | In-service steel pipe stray electrical current prison detection and cathodic protection power control and method |
| CN111549350A (en) * | 2020-06-05 | 2020-08-18 | 北京市燃气集团有限责任公司 | Open type cathode protection solar power supply system of low-pressure gas pipe network and installation method |
| CN111850570A (en) * | 2020-07-29 | 2020-10-30 | 山东京博石油化工有限公司 | Earthing liquefied hydrocarbon storage tank cathodic protection system |
| CN114351151A (en) * | 2022-01-20 | 2022-04-15 | 浙江钰烯腐蚀控制股份有限公司 | Cathode protection system for crossing river section pipeline |
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- 2014-06-17 CN CN201420323564.4U patent/CN203960334U/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104988512A (en) * | 2015-02-28 | 2015-10-21 | 中国石油大学(北京) | Cathode protection device and protection method thereof |
| CN104988512B (en) * | 2015-02-28 | 2017-10-10 | 中国石油大学(北京) | A kind of cathode protection device and its guard method |
| CN105040000A (en) * | 2015-07-10 | 2015-11-11 | 中国民航大学 | Portable cathode protection device |
| CN105821418A (en) * | 2016-03-11 | 2016-08-03 | 张永新 | Dynamic outboard optical energy electronic activation anticorrosion device |
| CN109023384A (en) * | 2017-06-09 | 2018-12-18 | 四川启昌管道工程有限责任公司 | A kind of novel convenient moveable cathodic protection skid mounted equipment |
| CN107236960B (en) * | 2017-06-22 | 2019-11-01 | 中国石油化工股份有限公司 | A kind of impressed current cathode protection device for oil expeller |
| CN107236960A (en) * | 2017-06-22 | 2017-10-10 | 中国石油化工股份有限公司 | A kind of impressed current cathode protection device for oil expeller |
| CN107419275A (en) * | 2017-08-01 | 2017-12-01 | 合肥威斯伏新材料有限公司 | A kind of pipeline anti-corrosive apparatus |
| CN108486576A (en) * | 2018-05-07 | 2018-09-04 | 北京碧海舟腐蚀防护工业股份有限公司 | flexible anode and detecting system |
| CN108486576B (en) * | 2018-05-07 | 2023-09-29 | 北京碧海云智新材料技术有限公司 | Flexible anode and detection system |
| CN109917720A (en) * | 2019-04-04 | 2019-06-21 | 中国石油化工股份有限公司 | In-service steel pipe stray electrical current prison detection and cathodic protection power control and method |
| CN111549350A (en) * | 2020-06-05 | 2020-08-18 | 北京市燃气集团有限责任公司 | Open type cathode protection solar power supply system of low-pressure gas pipe network and installation method |
| CN111850570A (en) * | 2020-07-29 | 2020-10-30 | 山东京博石油化工有限公司 | Earthing liquefied hydrocarbon storage tank cathodic protection system |
| CN114351151A (en) * | 2022-01-20 | 2022-04-15 | 浙江钰烯腐蚀控制股份有限公司 | Cathode protection system for crossing river section pipeline |
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