CN102560503A - Sacrificial anode assembly - Google Patents
Sacrificial anode assembly Download PDFInfo
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- CN102560503A CN102560503A CN2010106232748A CN201010623274A CN102560503A CN 102560503 A CN102560503 A CN 102560503A CN 2010106232748 A CN2010106232748 A CN 2010106232748A CN 201010623274 A CN201010623274 A CN 201010623274A CN 102560503 A CN102560503 A CN 102560503A
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- anode
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- box body
- sacrificial anode
- stainless steel
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Abstract
The invention relates to a sacrificial anode assembly which comprises anode legs and an anode body sleeved outside the anode legs, wherein each anode leg is connected with multiple diodes in series, and the diodes are arranged in a protection box body; the box body comprises an upper cover and a lower cover, and the upper cover and the lower cover are correspondingly buckled and connected together to form the box body having an internal cavity; and the intermediate junction between the upper cover and the lower cover of the box body is provided with an insulating pad, and the upper cover and the lower cover are connected into a whole by sleeving an insulating sleeve pad outside a fastener. When a stainless steel structure is mounted under sea water, the sacrificial anode assembly can send out electric current to protect the stainless steel structure, and the output potential can be changed into positive without reducing the capacitance and current efficiency of the anode body, thereby ensuring that the sacrificial anode assembly can be used for protecting stainless steel having relatively positive cathodic protection potential. At the same time, the invention has the advantages of low manufacturing cost, convenient mounting process and good protection effect.
Description
Technical field
The present invention relates to the sacrificial anode assembly, relate in particular to a kind of sacrificial anode assembly that is used for the protection of oceanographic engineering stainless steel cathode, belong to field of ocean engineering.
Background technology
In oil-field development, often contain corrosive gases carbonic acid gas and hydrogen sulfide etc. in the crude oil, in order to improve the tubing erosion resistance, submerged pipeline often adopts stainless steel.Along with the exploitation to deep water, stainless steel tube is with increasing submerged pipeline and the subsea production system etc. of being applied to.
The most reliable and effective anti-corrosion method in submerged pipeline outside is to adopt cathode protection technology, and oceanographic engineering is different with stainless galvanic protection and general carbon steel galvanic protection, especially protection potential.According to the requirement of DNV (Veritas) and NACE (National Association of Corrosion Engineers (NACE)), the cathodic protection potential of carbon steel-0.8～-1.05V (Ag/AgCl), stainless cathodic protection potential then is defeated by-0.30V (Ag/AgCl).If the cathodic Protection Design standard according to carbon steel is carried out stainless cathodic Protection Design, the possible overprotection of stainless steel, the protection effect not only reduces, and is prone to hydrogen embrittlement takes place, and mechanical property and corrosion resistance nature reduce greatly.
As shown in Figure 1, existing sacrificial anode (being: aluminium system, zinc system, magnesium system) substruction comprises: anode bodies 1 and anode leg 2, wherein, anode bodies 1 is set in anode leg 2 outsides.
And existing sacrificial anode (aluminium system, zinc system, magnesium system) can not directly be used for stainless galvanic protection because, no matter be aluminium base or the zinc-base open potential for sacrificial anode more negative, all make stainless steel produce overprotection easily.And other anode such as iron anode electrical capacity are less, and current efficiency is low, are used for stainless galvanic protection poor effect, and therefore, stainless galvanic protection haves much room for improvement with sacrificial anode.
Summary of the invention
Main purpose of the present invention is to overcome the above-mentioned shortcoming that prior art exists, and a kind of sacrificial anode assembly is provided, and when the stainless steel structure thing is installed in the seawater, it can send electric current the stainless steel structure thing is implemented protection; And output potential is just being become, can be used for the stainless protection of cathodic protection potential than calibration.
The objective of the invention is to realize by following technical scheme:
A kind of sacrificial anode assembly comprises: anode leg and be set in the outside anode bodies of anode leg; It is characterized in that: all be serially connected with several diodes on each anode leg, and diode is placed in the protection box body.
Said several diodes are that the form with parallel connection is concatenated on the anode leg.
Said box body is a steel, and box body comprises: go up cover and following the cover, last cover and following cover correspondence fastening each other also link together, and constitute the box body that an inside has cavity.
Said box body go up cover and down in the middle of the cover junction be provided with insulation spacer, and the mode through outside fastening piece, wearing the insulation sleeve gasket will on cover and down cover connect as one.
Said insulation spacer adopts tetrafluoroethylene, oil resisting rubber sheet asbestos or chloroprene rubber material manufacturing.
Beneficial effect of the present invention: the present invention is owing to adopt technique scheme, and when the stainless steel structure thing is installed in the seawater, it can send electric current the stainless steel structure thing is implemented protection; And output potential is just becoming under the situation that does not reduce anode bodies electrical capacity and current efficiency, can be used for the stainless protection of cathodic protection potential than calibration.Simultaneously, manufacturing expense of the present invention is low, and is easy for installation, protects effective.
Description of drawings:
Fig. 1 is existing sacrificial anode structural representation.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is Circuits System protection box (being connected in series 1 diode) structural representation of the present invention.
Fig. 4 is Circuits System protection box (being connected in series 2 diodes) structural representation of the present invention.
Main label declaration among the figure:
1 anode bodies, 2 anode legs, 3 steel protection box, 4 diodes, 5 leads,
1 ' fastening piece, 2 ' insulation sleeve gasket, 3 ' insulated enclosure pad, 4 ' time cover.
Embodiment
Like Fig. 2-shown in Figure 4, the present invention includes: anode bodies 1, anode leg 2, diode 4 and steel protection box 3.This anode bodies 1 is set in anode leg 2 outsides, and anode bodies 1 material is aluminium, zinc material, magnesium material, aluminium zinc composite wood, zinc-magnesium composite wood, magnalium composite wood or aluminium zinc-magnesium composite wood.Diode 4 is concatenated on the anode leg 2 through lead 5, and diode 4 is placed in the steel protection box 3; Wherein, All be serially connected with diode 4 on each anode leg 2; The number of serial connection diode 4 can be one or more, and a plurality of diodes 4 of serial connection are that parallel connection concerns that the purpose that is connected in series a plurality of diodes is in order to disperse big electric current; Feasible electric current through each diode 4 diminishes, to prevent that certain diode 4 damages and causes whole anode assemblies to work under big current conditions.Steel protection box 3 comprises: go up cover and cover 4 ' down, last cover and cover 4 ' is corresponding each other down fastens and formation one inside that links together has the box body of cavity.
Electric current is to flow to sacrificial anode from quilt protection works in the cathodic protection system, so the positive pole of diode is electrically connected by the protective end with stainless steel through copper wires, the negative pole of diode is electrically connected with the anode bodies end.
The junction is provided with insulation spacer 3 ' in the middle of the upward cover of steel protection box 3 and the following cover 4 '; To prevent that electric current from passing through steel protection box 3; Insulation spacer 3 ' adopts made such as tetrafluoroethylene, oil resisting rubber sheet asbestos, X 050; And the fastening piece 1 ' employing of covering up and down is holding bolt; The insulation covering and the insulating mat of holding bolt are united two into one, and half makes monobloc(k)type HS insulation sleeve gasket 2 ' to shorten insulation covering, the bolt hole of cover up and down that wears pad is extended to wears insulation sleeve gasket 2 '; Thereby guarantee that the sleeve gasket internal orifice dimension is fit to the requirement of former upper and lower cover 4 ' the used bolt, has just become the upper and lower cover 4 ' of insulating after the assembling.
The present invention is fixed on the stainless steel structure thing through welding process in use, when the stainless steel structure thing is installed in the ocean environment, plays the galvanic protection effect thereby the sacrificial anode assembly will make the stainless steel structure thing polarize.Stainless steel cathode protection of the present invention uses the method for use of sacrificial anode assembly to be prior art, so give unnecessary details no longer in detail.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (5)
1. sacrificial anode assembly comprises: anode leg and be set in the outside anode bodies of anode leg; It is characterized in that: all be serially connected with several diodes on each anode leg, and diode is placed in the protection box body.
2. sacrificial anode assembly according to claim 1 is characterized in that: said several diodes are that the form with parallel connection is concatenated on the anode leg.
3. sacrificial anode assembly according to claim 1 is characterized in that: said box body is a steel, and box body comprises: go up cover and following the cover, last cover and following cover correspondence fastening each other also link together, and constitute the box body that an inside has cavity.
4. according to claim 1 or 3 described sacrificial anode assemblies, it is characterized in that: said box body go up cover and down in the middle of the cover junction be provided with insulation spacer, and the mode through outside fastening piece, wearing the insulation sleeve gasket will on cover and down cover connect as one.
5. sacrificial anode assembly according to claim 4 is characterized in that: said insulation spacer adopts tetrafluoroethylene, oil resisting rubber sheet asbestos or chloroprene rubber material manufacturing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106232748A CN102560503A (en) | 2010-12-30 | 2010-12-30 | Sacrificial anode assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106232748A CN102560503A (en) | 2010-12-30 | 2010-12-30 | Sacrificial anode assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102560503A true CN102560503A (en) | 2012-07-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106232748A Pending CN102560503A (en) | 2010-12-30 | 2010-12-30 | Sacrificial anode assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102560503A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174214A (en) * | 2013-03-21 | 2013-06-26 | 交通运输部天津水运工程科学研究所 | Anti-corrosion type diffuser used for sewage deep sea discharge |
| CN104120429A (en) * | 2014-07-04 | 2014-10-29 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Replaceable sacrificial anode and replacement method thereof |
| CN108893745A (en) * | 2018-06-27 | 2018-11-27 | 中国船舶重工集团公司第七〇九研究所 | Replaceable sacrificial anode device and its replacing options |
| CN112522711A (en) * | 2020-09-03 | 2021-03-19 | 海洋石油工程股份有限公司 | Cathode protection mechanism for potential amplitude limiting |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000119883A (en) * | 1998-10-13 | 2000-04-25 | Toshiba Hokuto Electronics Corp | Corrosion preventing device |
| CN101463479A (en) * | 2007-12-18 | 2009-06-24 | 中国海洋石油总公司 | Special-shaped cross section sacrificial anode |
| CN201282424Y (en) * | 2008-10-31 | 2009-07-29 | 株洲科瑞变流电气有限公司 | Cathodic protection varying-voltage rectifier |
-
2010
- 2010-12-30 CN CN2010106232748A patent/CN102560503A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000119883A (en) * | 1998-10-13 | 2000-04-25 | Toshiba Hokuto Electronics Corp | Corrosion preventing device |
| CN101463479A (en) * | 2007-12-18 | 2009-06-24 | 中国海洋石油总公司 | Special-shaped cross section sacrificial anode |
| CN201282424Y (en) * | 2008-10-31 | 2009-07-29 | 株洲科瑞变流电气有限公司 | Cathodic protection varying-voltage rectifier |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174214A (en) * | 2013-03-21 | 2013-06-26 | 交通运输部天津水运工程科学研究所 | Anti-corrosion type diffuser used for sewage deep sea discharge |
| CN104120429A (en) * | 2014-07-04 | 2014-10-29 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Replaceable sacrificial anode and replacement method thereof |
| CN104120429B (en) * | 2014-07-04 | 2017-03-15 | 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 replaceable sacrificial anode and replacing options |
| CN108893745A (en) * | 2018-06-27 | 2018-11-27 | 中国船舶重工集团公司第七〇九研究所 | Replaceable sacrificial anode device and its replacing options |
| CN108893745B (en) * | 2018-06-27 | 2021-01-05 | 中国船舶重工集团公司第七一九研究所 | Replaceable sacrificial anode device and replacement method thereof |
| CN112522711A (en) * | 2020-09-03 | 2021-03-19 | 海洋石油工程股份有限公司 | Cathode protection mechanism for potential amplitude limiting |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20120711 |