CN202030825U - Deep well anode/cathode protection device for protecting embedded steel pipeline - Google Patents
Deep well anode/cathode protection device for protecting embedded steel pipeline Download PDFInfo
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- CN202030825U CN202030825U CN2011200852268U CN201120085226U CN202030825U CN 202030825 U CN202030825 U CN 202030825U CN 2011200852268 U CN2011200852268 U CN 2011200852268U CN 201120085226 U CN201120085226 U CN 201120085226U CN 202030825 U CN202030825 U CN 202030825U
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- anode
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- steel pipeline
- well
- buried steel
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Abstract
The utility model discloses a deep well anode/cathode protection device for protecting an embedded steel pipeline. The device comprises an anode well, a constant potential rectifier, an anode component, a reference electrode, a grounding electrode, a cathode cable and a zero cathode-connecting cable, wherein the constant potential rectifier is connected with the anode component, the grounding electrode and the reference electrode through an anode cable, a grounding electrode cable and a reference electrode cable respectively; the cathode cable and the zero cathode-connecting cable, which are connected with the embedded steel pipeline, are also arranged on the constant potential rectifier; the anode component includes a plurality of auxiliary anodes embedded in the anode well, anode racks for the mounting of the auxiliary anodes, a gas guide pipe arranged on the anode racks, a plurality of anode cables in the well which are connected onto the auxiliary anodes, and a busbar for converging the anode cables in the well; and the anode cables are connected onto the busbar. During the constant power supply of the constant potential rectifier, a current circuit can be formed between a deep well anode and the pipeline to protect the pipeline.
Description
Technical field
The utility model relates to a kind of galvanic protection corrosion-resisting device, is a kind of deep well anode cathodic protector that is used to protect buried steel pipeline specifically.
Background technology
The city buried pipeline is being carried the industry and the closely-related important logistics of various and national economy of daily necessities, and as water, oil, gas etc., the safe transport of these logistics is very important, and they are lifelines of city survival and development.But owing to wearing out of the corrodibility of carrying logistics in physical environment soil corrosivity, the pipe, protective coating layer, make the steel buried pipeline that comes into operation that the leakage accident of corrosion failure (or fracture) frequently take place, influenced the work-ing life of whole piece pipeline greatly.Be head it off; facts have proved; " the two resist technology " that adopt coat to add galvanic protection to the steel buried pipeline is effective; it also is very necessary that buried steel pipeline is carried out effective galvanic protection; reduced the replacing frequency of pipeline, the prior art great majority all are the constructional methods that has adopted sacrificial anode.Along with the enlarging of urban pipe network, pipe network is more and more intensive, and is in the bustling location in city, can't excavate, and construction has brought difficulty to sacrificial anode.
Summary of the invention
The purpose of this utility model provides a kind of deep well anode cathodic protector that is used to protect buried steel pipeline, has solved because the more and more intensive problem that can't excavate of urban pipe network.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of deep well anode cathodic protector that is used to protect buried steel pipeline, comprise that anode well, potentiostat, anode assemblies, reference electrode, earthing pole, cathode cable and zero-bit connect the negative electricity cable, described potentiostat is connected with anode assemblies by anode cable, be connected with earthing pole by the ground-electrode cable, be connected with reference electrode by the reference electrode cable, potentiostat also is provided with anastomosing cathode cable of buried steel pipeline and zero-bit and connects the negative electricity cable; Described anode assemblies comprises many supplementary anodes being embedded in the anode well, the anode frame of supplementary anode is installed, be arranged on airway on the anode frame, be connected anode cable in the many wells on each supplementary anode and the omnibus bar of the many well anode cables that are used for confluxing; Described anode cable is connected on the omnibus bar.
The outer wall of described buried steel pipeline is provided with preservative coat, protection buried steel pipeline and non-protection piping insulation.
Described supplementary anode is noble metallic oxide anode or high silicon cast-iron anode.
Fill with coke around the described supplementary anode, outer bread is with cotton bag.
Described reference electricity is installed in by the buried steel pipeline.
Described reference electrode will fully soak 24h before burying underground, the filler that is no less than 20Kg is arranged on every side when burying underground, and make reference electrode be positioned at the center of filler.
Described earthing pole is embedded in 5 meters dark wells at least, and stake resistance is less than 10 Ω.
Described every supplementary anode is connected into one by the ring flange on self anode frame, fills out to be set to and bores in the good anode well.
After described supplementary anode is gone into the well, fill out coke in the anode well, fill out pebbles above the coke.
Described supplementary anode is embedded in 16 meters dark anode well at least.
The beneficial effects of the utility model are: deep well anode less investment, quantities be little, not limited by landform; Deep well anode is minimum to the influence of the underground steel construction of protected side, and stake resistance is little, interference is little, energy-conservation; The deep well anode protection is effective, outward current big, distance.
Description of drawings
Fig. 1 is the structural representation that is used to protect the deep well anode cathodic protector of buried steel pipeline of the present utility model.
Fig. 2 is the structural representation of supplementary anode parcel of the present utility model.
Among the figure: 1, steel pipe, 2, reference electrode, 3, potentiostat, 4, omnibus bar, 5,15, supplementary anode, 6,16, the anode frame, 7, anode well, 8, earthing pole, 9, cathode cable, 10, zero-bit connects the negative electricity cable, 11, reference electrode cable, 12, the earthing pole cable, 13,23, anode cable in the well, 14, anode cable, 17,27, ring flange, 18, airway, 19, cotton bag.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
As shown in Figure 1, the deep well anode cathodic protector that is used to protect buried steel pipeline of the present utility model, comprise that anode well 7, potentiostat 3, anode assemblies, reference electrode 2, earthing pole 8, cathode cable 9 and zero-bit connect negative electricity cable 10, described potentiostat 3 is connected with anode assemblies by anode cable 14, be connected with earthing pole 8 by ground-electrode cable 12, be connected with reference electrode 2 by reference electrode cable 11, potentiostat 3 also is provided with buried steel pipeline 1 anastomosing cathode cable 9 and zero-bit and connects negative electricity cable 10; Described anode assemblies comprises many supplementary anodes 5 that are embedded in the anode well 7,15, supplementary anode 5 is installed, 15 anode frame 6,16, be arranged on airway 18 on the anode frame, be connected each supplementary anode 5, anode cable 13 in the many wells on 15,23 and the omnibus bar 4 of the many well anode cables 13,23 that are used for confluxing; Described anode cable 14 is connected on the omnibus bar 4.
The outer wall of described buried steel pipeline 1 is provided with preservative coat, protection buried steel pipeline and non-protection piping insulation.Described supplementary anode 5,15 is noble metallic oxide anode or high silicon cast-iron anode, preferred high silicon chromium cast iron contained anode.
As shown in Figure 2, fill with coke around the described supplementary anode 5,15, outer bread is with cotton bag 19.
Described reference electrode 2 is installed in by the buried steel pipeline, and reference electrode 2 will fully soak 24h before burying underground, and the filler that is no less than 20Kg, filler being arranged on every side when burying underground is terra alba (CaSO
4.2H
2O): industrial sulphuric acid sodium (Na
2SO
4): wilkinite mixes, and its ratio of mixture is 75: 5: 2, and reference electrode is positioned at the center of filler.Described reference electrode 2 is selected the long lifetime reference electrode for use.
Described earthing pole 8 is embedded in 5 meters dark wells at least, and stake resistance is less than 10 Ω.
Described every supplementary anode 5,15 is connected into one by the ring flange 17,27 on self anode frame 6,16, fills out to be set to and bores 7 li of good anode well, and after supplementary anode was gone into the well, anode well was filled out coke for 7 li, filled out pebbles above the coke.Supplementary anode 5 is embedded in 16 meters dark anode well at least.
The deep well anode galvanic protection is a kind of of impressed current method, and the function of supplementary anode is that protective current is delivered on the protective, so be under the electrolysis state during anode working.Direct supply is the propulsion source of impressed current, and its basic demand is reliable and stable, can move continuously for a long time, adapts to various envrionment conditionss.
Corrosion of Metallic Materials is to act as main electrochemical process with corrosion cell, exists following reaction process:
Anodic reaction: Fe-2e → Fe
2+
Cathodic reaction:
It is that direct supply by the outside directly passes to cathodic current to protected metal, makes it cathodic polarization, reaches the purpose of galvanic protection.
Specifically, with every high silicon cast iron supplementary anode 5,15 by self anode frame 6, ring flange 17 on 16,27 are connected into one, connect airway 18, fill out to be set to and bore 7 li of good anode well, it is other that reference electrode 2 is installed in steel pipe 1, cathode cable 9, zero-bit connects the mode of negative electricity cable 10 by aluminothermy welding and is welded on the steel pipe 1, and anode cable 14 is anode cable 13,23 in every well to be confluxed by omnibus bar 4 be merged into one, earthing pole 8 is embedded in 5 meters dark wells, reference electrode cable 11, cathode cable 9, zero-bit connects negative electricity cable 10, anode cable 14 and earthing pole cable 12 are connected on the corresponding contact of potentiostat 3 separately.In the process of potentiostat 3 continued powers, make deep well anode and pipeline constitute current circuit, thereby pipeline is protected.
The deep well anode cathodic protector that is used for buried steel pipeline for example of the present utility model is used for area, Fengtai, Beijing natural gas line deep well anode cathodic protection engineering.Engineering is a Fengtai District pipeline under Beijing's Gas Group, and pipeline total length 20Km, pipeline are the DN400 steel pipe, and external anti-corrosion layer is epoxide coal bituminous.The pipe network area is the long 5Km of thing, and 3Km long from south to north, pipeline mainly are laid on the other arterial highway, the bigger Residential areas of the Fengtai District volume of the flow of passengers.The major project amount comprises 1 mouthful of deep-well, and supporting potentiostat (DCPS digitally controlled power source), long effective reference electrode, negative electrode confluence.The anode well depth is 120 meters, establishes 20 of supplementary anodes in the well, and the potentiostat specification is 50A/60V, model PS-1, the place of production: Fujian Changlian Electronics Co., Ltd.
20 of deep-well supplementary anodes are buried in this engineering Drilling φ 400mm, a glance of degree of depth 120m wellhole underground, settle 1 of potentiostat.
Deep well anode, reference electrode, earthing pole are connected with potentiostat by cable, in the process of potentiostat continued power, make deep well anode and pipeline constitute current circuit, thereby pipeline is protected.
In the construction, 22 place's isolating joints are set completely, the current lead-through with isolated protection depot siding and the disconnected pipeline of non-protection causes electric current to run off; 19 of test point along the line are set completely, so that regularly detect the galvanic protection present situation of pipeline.
After deep well anode cathodic protection system operation, pipeline from operation so far, operation conditions is good, completely the protection potential of pipeline all-0.85v～-1.5v between, reached design requirements.
Construction overall process be in safety, stable, fast, the fine controllable state, construction quality is good, no industrial accident takes place, and has obtained the favorable comment of construction, management each side.
Be in because of construction site near the Residential areas of prosperity, be again on the turnpike road simultaneously, adopted this equipment, overcome the difficult point that to excavate, reduced influence near resident trip, also having reduced simultaneously sacrificial anode needs the manpower of pointwise excavation, the waste of financial resources, has saved resource, has reduced the input of fund.
In sum, content of the present utility model is not limited in the above-described embodiment, knowledgeable people in the same area can propose other embodiment easily within technical director's thought of the present utility model, but this embodiment is included within the scope of the present utility model.
Claims (10)
1. deep well anode cathodic protector that is used to protect buried steel pipeline, comprise that anode well, potentiostat, anode assemblies, reference electrode, earthing pole, cathode cable and zero-bit connect the negative electricity cable, it is characterized in that, described potentiostat (3) is connected with anode assemblies by anode cable (14), be connected with earthing pole (8) by ground-electrode cable (12), be connected with reference electrode (2) by reference electrode cable (11), potentiostat (3) also is provided with anastomosing cathode cable of buried steel pipeline (1) (9) and zero-bit and connects negative electricity cable (10); Described anode assemblies comprises many supplementary anodes (5 that are embedded in the anode well (7), 15), supplementary anode (5 is installed, 15) anode frame (6,16), be arranged on airway (18) on the anode frame, be connected each supplementary anode (5,15) anode cable (13 in the many wells on, 23) and the omnibus bar (4) of the many well anode cables (13,23) that are used for confluxing; Described anode cable (14) is connected on the omnibus bar (4).
2. the deep well anode cathodic protector that is used to protect buried steel pipeline according to claim 1 is characterized in that the outer wall of described buried steel pipeline (1) is provided with preservative coat, protection buried steel pipeline and non-protection piping insulation.
3. the deep well anode cathodic protector that is used to protect buried steel pipeline according to claim 1 is characterized in that described supplementary anode (5,15) is noble metallic oxide anode or high silicon cast-iron anode.
4. according to claim 1 or the 3 described deep well anode cathodic protectors that are used to protect buried steel pipeline, it is characterized in that described supplementary anode (5,15) fills with coke on every side, outer bread is with cotton bag (19).
5. the deep well anode cathodic protector that is used to protect buried steel pipeline according to claim 1 is characterized in that described reference electrode (2) is installed in by the buried steel pipeline.
6. the deep well anode cathodic protector that is used to protect buried steel pipeline according to claim 5; it is characterized in that; described reference electrode (2) will fully soak 24h before burying underground, the filler that is no less than 20Kg is arranged on every side when burying underground, and make reference electrode be positioned at the center of filler.
7. the deep well anode cathodic protector that is used to protect buried steel pipeline according to claim 1 is characterized in that described earthing pole (8) is embedded in 5 meters dark wells at least, and stake resistance is less than 10 Ω.
8. the deep well anode cathodic protector that is used to protect buried steel pipeline according to claim 1 is characterized in that, described every supplementary anode (5; 15) by self anode frame (6; 16) ring flange on (17,27) is connected into one, fills out to be set to and bores good anode well (7) lining.
9. the deep well anode cathodic protector that is used to protect buried steel pipeline according to claim 8 is characterized in that, after described supplementary anode was gone into the well, coke was filled out in anode well (7) lining, fills out pebbles above the coke.
10. the deep well anode cathodic protector that is used to protect buried steel pipeline according to claim 1 is characterized in that described supplementary anode (5,15) is embedded in 16 meters dark anode well at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011200852268U CN202030825U (en) | 2011-03-28 | 2011-03-28 | Deep well anode/cathode protection device for protecting embedded steel pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200852268U CN202030825U (en) | 2011-03-28 | 2011-03-28 | Deep well anode/cathode protection device for protecting embedded steel pipeline |
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| CN2011200852268U Expired - Lifetime CN202030825U (en) | 2011-03-28 | 2011-03-28 | Deep well anode/cathode protection device for protecting embedded steel pipeline |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214468A (en) * | 2014-07-31 | 2014-12-17 | 西安石油大学 | Device and method for preventing pipeline inner wall corrosion through adopting external sacrificial anode |
| CN104789969A (en) * | 2015-04-23 | 2015-07-22 | 北京永逸舒克防腐蚀技术有限公司 | Replaceable sacrificial anode well and replacement method thereof |
| CN105112922A (en) * | 2015-08-10 | 2015-12-02 | 国网天津市电力公司 | Impressed current cathodic protection system for electric grounding device |
| CN105780016A (en) * | 2016-04-26 | 2016-07-20 | 天津隆顺技术服务有限公司 | Cathode protection system for powerless insulation region |
| CN106099410A (en) * | 2016-06-29 | 2016-11-09 | 中国石油化工股份有限公司 | Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system and method |
| CN104562043B (en) * | 2015-01-09 | 2017-07-07 | 西安石油大学 | Well Casing Cathodic Protection system and electrode cloth position method based on pulse current |
| CN107287601A (en) * | 2016-04-12 | 2017-10-24 | 海南电力技术研究院 | A kind of sacrificial magnesium alloy anode containing sodium nitrate fills out construction materials contract and preparation method thereof |
| CN108123233A (en) * | 2016-11-30 | 2018-06-05 | 中国石油天然气股份有限公司 | A kind of pipeline AC influence protects stream discharging system |
| CN109112549A (en) * | 2018-09-11 | 2019-01-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of collecting well group cathodic protection system and double anode well fault detection method |
| CN109136938A (en) * | 2018-07-23 | 2019-01-04 | 北京中冶和坤天冕工程技术有限公司 | Cathodic protection of underground pipeline anti-corrosion method |
| CN109546366A (en) * | 2018-10-29 | 2019-03-29 | 中国能源建设集团广东省电力设计研究院有限公司 | The upper end insulation structure of deep-well type earthing pole |
| CN114807946A (en) * | 2022-04-19 | 2022-07-29 | 国家石油天然气管网集团有限公司 | Long-acting reference electrode capable of supplementing liquid and detecting without replacement |
-
2011
- 2011-03-28 CN CN2011200852268U patent/CN202030825U/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214468A (en) * | 2014-07-31 | 2014-12-17 | 西安石油大学 | Device and method for preventing pipeline inner wall corrosion through adopting external sacrificial anode |
| CN104562043B (en) * | 2015-01-09 | 2017-07-07 | 西安石油大学 | Well Casing Cathodic Protection system and electrode cloth position method based on pulse current |
| CN104789969A (en) * | 2015-04-23 | 2015-07-22 | 北京永逸舒克防腐蚀技术有限公司 | Replaceable sacrificial anode well and replacement method thereof |
| CN104789969B (en) * | 2015-04-23 | 2017-08-25 | 北京永逸舒克防腐蚀技术有限公司 | Replaceable sacrificial anode well and its replacing options |
| CN105112922A (en) * | 2015-08-10 | 2015-12-02 | 国网天津市电力公司 | Impressed current cathodic protection system for electric grounding device |
| CN107287601A (en) * | 2016-04-12 | 2017-10-24 | 海南电力技术研究院 | A kind of sacrificial magnesium alloy anode containing sodium nitrate fills out construction materials contract and preparation method thereof |
| CN105780016B (en) * | 2016-04-26 | 2018-06-26 | 天津隆顺技术服务有限公司 | A kind of no electric insulated region cathodic protection system |
| CN105780016A (en) * | 2016-04-26 | 2016-07-20 | 天津隆顺技术服务有限公司 | Cathode protection system for powerless insulation region |
| CN106099410B (en) * | 2016-06-29 | 2019-01-25 | 中国石油化工股份有限公司 | Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system and method |
| CN106099410A (en) * | 2016-06-29 | 2016-11-09 | 中国石油化工股份有限公司 | Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system and method |
| CN108123233A (en) * | 2016-11-30 | 2018-06-05 | 中国石油天然气股份有限公司 | A kind of pipeline AC influence protects stream discharging system |
| CN109136938A (en) * | 2018-07-23 | 2019-01-04 | 北京中冶和坤天冕工程技术有限公司 | Cathodic protection of underground pipeline anti-corrosion method |
| CN109112549A (en) * | 2018-09-11 | 2019-01-01 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of collecting well group cathodic protection system and double anode well fault detection method |
| CN109112549B (en) * | 2018-09-11 | 2023-08-18 | 中国石油天然气集团有限公司 | Cluster well cathode protection system and double-anode well fault detection method |
| CN109546366A (en) * | 2018-10-29 | 2019-03-29 | 中国能源建设集团广东省电力设计研究院有限公司 | The upper end insulation structure of deep-well type earthing pole |
| CN109546366B (en) * | 2018-10-29 | 2020-10-30 | 中国能源建设集团广东省电力设计研究院有限公司 | Upper end insulation structure of deep well type grounding electrode |
| CN114807946A (en) * | 2022-04-19 | 2022-07-29 | 国家石油天然气管网集团有限公司 | Long-acting reference electrode capable of supplementing liquid and detecting without replacement |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111109 |