CN103982752A - Dual side interaction cathode protection method for PCCP (prestressed concrete cylinder pipe) - Google Patents
Dual side interaction cathode protection method for PCCP (prestressed concrete cylinder pipe) Download PDFInfo
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- CN103982752A CN103982752A CN201410202846.3A CN201410202846A CN103982752A CN 103982752 A CN103982752 A CN 103982752A CN 201410202846 A CN201410202846 A CN 201410202846A CN 103982752 A CN103982752 A CN 103982752A
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- pipeline
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- unit
- steel
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/12—Electrodes characterised by the material
- C23F13/14—Material for sacrificial anodes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/02—Electrically insulating joints or couplings
Abstract
The invention belongs to the field of municipal water supplying and drainage and particularly relates to a dual side interaction cathode protection method for a PCCP (prestressed concrete cylinder pipe). The method can be applied to the anti-corrosion engineering of a long-distance water conveying pipeline. The method comprises the steps of connecting two steel bands with a prestressed steel wire of each unit pipe section of the PCCP in a downward press mode and welding the steel bands with a steel drum at two pipe end positions of each unit pipe section; serially arraying and connecting 1-5 unit pipe sections to form a group of repeated pipe section, arranging a group of band-shaped zinc anodes at the outer part of each group of repeated pipe sections in the direction parallel with the pipeline, and electrically connecting the band-shaped zinc anodes with each unit pipe section in the group of repeated pipe section, and electrically connecting two groups of repeated pipe sections, wherein the band-shaped zinc anodes arranged at the outer parts of the any two adjacent groups of repeated pipe sections are oppositely arrayed at two sides of the pipeline, and the band-shaped zinc anodes at the same side of the pipeline are collinearly or approximately collinearly arrayed. While achieving the aim of completely protecting the PCCP, the method can be used for effectively saving engineering investment by 30%.
Description
Technical field
The invention belongs to municipal plumbing field, relate in particular to a kind of interactive cathode protecting process of bilateral of PCCP pipeline, can be applicable to the antiseptic project of Long-distance Pipeline for Water Conveyance.
Background technique
The laying of anode material is divided into one-sided formula and bilateral formula, and some engineering is even laid respectively at the different direction of pipeline.South water to north water supply line cathodic protection scheme is with reference to the way of the large race of Libya; parallel PCCP pipeline is buried 4 ribbon zinc anodes underground in the upper and lower, left and right of pipeline; at the steel component connection part of pipeline; example exhaust valve well, emptying valve pit, connection facility, bleeder and elbow; adopt bar-shaped magnesium anode, the disadvantage of this scheme is that cost is high.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides the PCCP pipeline of the interactive cathodic protection of a kind of bilateral.This kind of pipeline, in realizing complete preservation PCCP pipeline, can effectively be saved investment, is the anticorrosion technical foundation that provides of other water supply lines simultaneously.
The interactive cathode protecting process of bilateral of PCCP pipeline, it is: two steel bands of crimping under the reinforcement wire of the unit of PCCP pipeline repetition pipeline section, and two pipe end places and the steel cylinder welding at described unit repetition pipeline section by steel band; Repeat pipeline section taking the described unit of 1～5 joint series arrangement and connection as one group of repetition pipeline section; the external parallel that repeats pipeline section in each group (is described PCCP pipeline in pipeline; hereinafter to be referred as pipeline) direction on one group of zinc ribbon anode is set; and described zinc ribbon anode is electrically connected with each joint unit pipeline section that this group repeats in pipeline section; two groups of adjacent repetition pipeline sections are electrically connected; to reach the cross-over connection of electric continuity, the steel cylinder in PCCP pipeline and prestressed reinforcement are protected.And, two groups of the arbitrary neighborhood zinc ribbon anodes that repeat pipeline section outer installment are arranged in to the both sides that pipeline is relative, by the outer pipeline zinc ribbon anode conllinear of the same side or arranging of approximate conllinear, distribute point-blank, or be distributed in generally near of straight line.
Preferably, the main axis of the zinc ribbon anode of pipeline both sides and pipeline is arranged in same plane, or approximate being arranged in same plane, be arranged on a face by it, or be arranged in generally near of a face.
Preferably; on PCCP pipeline, be also provided with steel component; in the joint of described pipeline and described steel component; bar-shaped zinc anode is set to be protected separately described steel component; described steel component is exhaust valve pit, emptying valve pit, is communicated with facility, bleeder or elbow, reaches banded and bar-shaped zinc reasonable combination application.
Preferably, along pipeline installing test point, with monitoring pipeline corrosion situation at any time.
The present invention also provides the PCCP pipeline of the interactive cathodic protection of a kind of bilateral based on above guard method, comprise first group of repetition pipeline section and second group of repetition pipeline section of alternately arranging, described first group of repetition pipeline section and described second group of repetition pipeline section comprise that respectively the unit of 1～5 joint series arrangement and connection repeats pipeline section, every joint unit repeats pipeline section and comprises successively internal layer concrete layer by internal layer to skin, steel cylinder, middle level concrete layer, reinforcement wire and outer cement mortar protective course, between the group between two groups of adjacent pipeline sections, seam crossing arranges between two groups of groups and connects steel disc, between the unit between two adjacent joint unit repetition pipeline sections, seam crossing arranges between two groups of unit and connects steel disc, wherein:
Two groups of steel bands are also set between described middle level concrete layer and described reinforcement wire in the direction parallel with pipeline, described steel band is connected with described reinforcement wire, can in the time making, reinforcement wire be pressed on described steel band, to reach sufficient connection, and be connected with described steel cylinder at the two ends place of unit repetition pipeline section;
Between described group, connect and between steel disc, described unit, connect described firm band, reinforcement wire or the steel cylinder that steel disc connects two adjacent joint unit and repeat pipeline sections;
At one group of zinc ribbon anode of outer installment of first group of repetition pipeline section described in each section, the other zinc ribbon anode of establishing of all first group of described pipeline sections is positioned at the homonymy outside pipeline, and it is parallel with pipeline to arrange; At one group of zinc ribbon anode of outer installment of second group of repetition pipeline section described in each section, the other zinc ribbon anode of establishing of all second group of described pipeline sections is positioned at the homonymy outside pipeline, and it is parallel with pipeline to arrange; The other zinc ribbon anode of establishing of described first group of pipeline section is arranged in the other zinc ribbon anode of establishing of described second group of pipeline section the both sides that pipeline is relative;
Every group of zinc ribbon anode connected between two groups of the one group pipeline section two ends homonymy corresponding with it and connected steel disc by cable respectively, connects steel disc and repeat to be connected steel disc between the unit between pipeline section with unit in this group and pass through cable series connection between two groups at these group pipeline section two ends in the same side.
Parallel PCCP piping laying zinc ribbon anode, one group of pipeline section need to arrange the zinc ribbon anode of a unit.Two groups of adjacent zinc bands are arranged on pipe both sides alternately, are seen as and are arranging along being parallel to alternatively up and down, front and back the direction of PCCP pipeline from side-looking face.Zinc band two ends are electrically connected with corresponding pipeline by cable, and the steel cylinder in PCCP pipeline and prestressed reinforcement are protected.
Preferably, two groups of steel bands in described unit repetition pipeline section are taking the main axis of described pipeline section as symmetry axis symmetry or near symmetrical setting; Between described group, between two of seam crossing setting groups of groups, connect steel disc taking the main axis of described pipeline section as symmetry axis symmetry or near symmetrical setting, between described unit, seam crossing arranges and between two groups of unit, connects steel disc taking the main axis of described pipeline section as symmetry axis symmetry or near symmetrical setting; Between described steel band, described zinc ribbon anode, described group, connect that between steel disc and described unit, to connect steel disc coplanar or approximate coplanar.
Preferably, described first group of repetition pipeline section and described second group of repetition pipeline section comprise that respectively the unit of 5 joint series arrangement and connection repeats pipeline section.
Zinc band is taking 30m as a unit, and it is 6m that a unit repeats pipeline section.Each group pipeline section comprises that the setting of 5 unit repetition pipeline sections can well be applicable to professional standard.
Preferably, the joint of other steel components outside described pipeline and described pipeline arranges bar-shaped zinc anode, and described bar-shaped zinc anode connects the steel cylinder of described pipeline section by cable.
At pipeline bilateral, zinc band is set; be used for carrying out the cathodic protection of sacrificial zinc anode method; in PCCP pipeline and steel component joint; example exhaust valve well, emptying valve pit, connection facility, bleeder and elbow; bar-shaped zinc anode is set and protects building separately, reach banded and bar-shaped zinc reasonable combination application.
Preferably, carry out electrical insulation at the first and last end of described pipeline, bifurcation and with the insulating material of installation two ends, the joint coating epoxy resin of external pipe.
In addition, along pipeline installing test point, monitoring pipeline corrosion situation at any time.
This cathode protection technology is meeting under the requirement of current potential criterion, has played effect to controlling corrosion, and while and bilateral parallel laid anode material scheme are compared, and this technological scheme can effectively be saved nearly 30% construction investment.
Cathode protection method is used for the equal prepared material of steel, and the utilization of the interactive cathode protection technology of bilateral on the eastern water supply line of standard put into practice and successfully proved that the non-even tubulation of PCCP road can apply cathodic protection equally, and this is to being of great importance the working life that extends pipeline.
Generally; this patent is parallel PCCP piping laying one ribbon zinc anode; zinc band is taking 30m as a unit; adjacent two zinc bands are placed on pipe both sides alternately; two ends are electrically connected with corresponding pipe by cable; PCCP pipeline adopts steel component joint, can be electrically connected, and adopts bar-shaped zinc anode protection according to designing requirement.This kind of method, in reaching complete preservation PCCP pipeline, can effectively be saved 30% construction investment.
Brief description of the drawings
Fig. 1 is the structural representation at the pipeline section place of the PCCP pipeline of the interactive cathodic protection of bilateral.
In accompanying drawing, the parts of each label representative are as follows:
1, internal layer concrete layer, 2, steel cylinder, 3, middle level concrete layer; 4, reinforcement wire, 5, outer cement mortar protective course, 6, steel band; 7, between group, connect steel disc, 8, connect steel disc between unit, 9, zinc ribbon anode; 10, unit repeats pipeline section; 11, first group is repeated pipeline section, 12, second group repeat pipeline section, 13, seam crossing between unit; 14, seam crossing between group, 15, main axis.
Embodiment
Below principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
In a concrete mode of execution, as shown in Figure 1, for the PCCP pipeline of the interactive cathodic protection of bilateral of the interactive cathode protecting process of a kind of bilateral based on PCCP pipeline provided by the present invention, it comprises first group of repetition pipeline section 11 and second group of repetition pipeline section 12 of alternately arranging and connecting, described first group of repetition pipeline section and described second group of repetition pipeline section comprise that respectively the unit of 5 joint series arrangement and connection repeats pipeline section 10, every joint unit repeats pipeline section and comprises successively internal layer concrete layer 1 by internal layer to skin, steel cylinder 2, middle level concrete layer 3, reinforcement wire 4 and outer cement mortar protective course 5, between the group between two groups of adjacent pipeline sections, seam crossing 14 arranges between two groups of groups and connects steel disc 7, between the unit between two adjacent joint unit repetition pipeline sections, seam crossing 13 arranges between two groups of unit and connects steel disc 8.
Between described middle level concrete layer and described reinforcement wire, also in the direction at parallelpiped, two groups of steel bands 6 are being set, described steel band and described reinforcement wire crimping, and be connected with described steel cylinder at the two ends place of unit repetition pipeline section; Between described group, connect and between steel disc, described unit, connect described firm band, reinforcement wire or the steel cylinder that steel disc connects two adjacent joint unit and repeat pipeline sections.
At one group of zinc ribbon anode of outer installment of first group of repetition pipeline section described in each section, the other zinc ribbon anode of establishing of all first group of described pipeline sections is positioned at the homonymy outside pipeline, and it is parallel with pipeline to arrange; At one group of zinc ribbon anode of outer installment of second group of repetition pipeline section described in each section, the other zinc ribbon anode of establishing of all second group of described pipeline sections is positioned at the homonymy outside pipeline, and it is parallel with pipeline to arrange; The other zinc ribbon anode of establishing of described first group of pipeline section is arranged in the other zinc ribbon anode of establishing of described second group of pipeline section the both sides that pipeline is relative.
Every group of zinc ribbon anode connected between two groups of the one group pipeline section two ends homonymy corresponding with it and connected steel disc by cable respectively, connects steel disc and repeat to be connected steel disc between the unit between pipeline section with unit in this group and pass through cable series connection between two groups at these group pipeline section two ends in the same side.
Wherein, two groups of connection steel discs of the homonymy of the seam crossing setting at described two groups of steel bands, described two groups of zinc ribbon anodes and described pipeline section two ends arrange the best in the following manner, also as shown in Figure 1:
Described unit repeats two groups of steel bands in pipeline section and is symmetrical arranged taking the main axis of described pipeline section as symmetry axis.Between described group, between two of seam crossing setting groups of groups, connect steel disc taking the main axis of described pipeline section as symmetry axis symmetry or near symmetrical setting, between described unit, seam crossing arranges and between two groups of unit, connects steel disc and be symmetrical arranged taking the main axis of described pipeline section as symmetry axis.Between described steel band, described zinc ribbon anode, described group, connect and between steel disc and described unit, connect the coplanar setting of steel disc.
According to GB28724 standard-required; when prestressed concrete pipe road (PCCP pipe) cathodic protection, tackle prestressed reinforcement and steel cylinder carries out electric continuity connection; also ensure that the longitudinal steel bar of each pipe joint joins end to end simultaneously, otherwise the difficult one-tenth of protective system loop.With technological scheme provided by the present invention, PCCP pipe has on the make adopted two steel bands of crimping under reinforcement wire, and steel band is welded at PCCP pipe end and steel cylinder, ensures the electric continuity of cathodic protection current between prestressed reinforcement and steel cylinder.Meanwhile, for ensureing the electric continuity between PCCP pipe, by the connection steel disc of seam crossing between two adjacent pipeline sections, every joint PCCP pipe is carried out to electric continuity cross-over connection.
In addition, the joint of other steel components outside described pipeline and described pipeline arranges bar-shaped zinc anode, and described bar-shaped zinc anode connects the steel cylinder of described pipeline section by cable.The bar-shaped zinc anode construction requirement in steel member place and PCCP pipe are basic identical, and cable adopts thermit welding to be connected with steel pipe, and joint adopts hot melt adhesive anti-corrosion insulation.
For preventing the interference of stray electrical current and the loss of PCCP pipe protection electric current, protecting first and last end, the bifurcation of pipeline and carrying out electrical insulation with the joint installing insulating facility of external pipe.The present invention adopts at pipe two ends coating epoxy resin insulation material and realizes.
For ensureing daily management and the maintenance of test point, the present invention is along a test point is set on the position at the about 1km of PCCP pipeline interval simultaneously, and testing cassete should combine with (manhole) exhaust valve pit.By new NBS (GB/T21448); criteria for cathodic protection adopts polarization potential numerical value to be as the criterion; what the present invention adopted is anode loss protection; therefore adopt probe power-off method (in GB/T21246 5.9) to measure the protection potential of PCCP pipe, and utilize and measure the self potential at this place from corrosion coupon (reinforcing bar) on probe.
It should be noted that, the technical program is mainly used in embed-type Prestressed concrete cylinder pipe, but can be applied to lined Prestressed concrete cylinder pipe equally.Different due to the structure of lined Prestressed concrete cylinder pipe and embed-type Prestressed concrete cylinder pipe, its steel cylinder outer wall direct winding ring orientation prestress steel wire conventionally, so can arrange or steel band is not set and reach sufficient electrical connection.
The foregoing is only preferred embodiments of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the interactive cathode protecting process of the bilateral of PCCP pipeline, it is:
Two steel bands of crimping under the reinforcement wire of the unit of PCCP pipeline repetition pipeline section, and two pipe end places and the steel cylinder welding at described unit repetition pipeline section by steel band; Repeat pipeline section taking the described unit of 1～5 joint series arrangement and connection as one group of repetition pipeline section, the external parallel that repeats pipeline section in each group arranges one group of zinc ribbon anode in the direction of pipeline, and described zinc ribbon anode is electrically connected with each joint unit pipeline section that this group repeats in pipeline section, two groups of adjacent repetition pipeline sections are electrically connected, wherein, two groups of the arbitrary neighborhood zinc ribbon anodes that repeat pipeline section outer installment are arranged in to the both sides that pipeline is relative, by the outer pipeline zinc ribbon anode conllinear of the same side or arranging of approximate conllinear.
2. the interactive cathode protecting process of the bilateral of PCCP pipeline according to claim 1, is characterized in that: the main axis of the zinc ribbon anode of pipeline both sides and pipeline is arranged in same plane, or approximate being arranged in same plane.
3. the interactive cathode protecting process of the bilateral of PCCP pipeline according to claim 1 and 2; it is characterized in that: on PCCP pipeline, be also provided with steel component; in the joint of described pipeline and described steel component; bar-shaped zinc anode is set described steel component is protected separately, described steel component is exhaust valve pit, emptying valve pit, connection facility, bleeder or elbow.
4. the interactive cathode protecting process of the bilateral of PCCP pipeline according to claim 1 and 2, is characterized in that: pipeline test point is set along the line, with monitoring pipeline corrosion situation at any time.
5. the PCCP pipeline of the interactive cathodic protection of bilateral, comprise first group of repetition pipeline section and second group of repetition pipeline section of alternately arranging, described first group of repetition pipeline section and described second group of repetition pipeline section comprise that respectively the unit of 1～5 joint series arrangement and connection repeats pipeline section, every joint unit repeats pipeline section and comprises successively internal layer concrete layer by internal layer to skin, steel cylinder, middle level concrete layer, reinforcement wire and outer cement mortar protective course, between the group between two groups of adjacent pipeline sections, seam crossing arranges between two groups of groups and connects steel disc, between the unit between two adjacent joint unit repetition pipeline sections, seam crossing arranges between two groups of unit and connects steel disc, wherein:
Between described middle level concrete layer and described reinforcement wire, also two groups of steel bands are set in the direction parallel with pipeline, described steel band is connected with described reinforcement wire, and the two ends place that repeats pipeline section in unit is connected with described steel cylinder;
Between described group, connect and between steel disc, described unit, connect described firm band, reinforcement wire or the steel cylinder that steel disc connects two adjacent joint unit and repeat pipeline sections;
At one group of zinc ribbon anode of outer installment of first group of repetition pipeline section described in each section, the other zinc ribbon anode of establishing of all first group of described pipeline sections is positioned at the homonymy outside pipeline, and it is parallel with pipeline to arrange; At one group of zinc ribbon anode of outer installment of second group of repetition pipeline section described in each section, the other zinc ribbon anode of establishing of all second group of described pipeline sections is positioned at the homonymy outside pipeline, and it is parallel with pipeline to arrange; The other zinc ribbon anode of establishing of described first group of pipeline section is arranged in the other zinc ribbon anode of establishing of described second group of pipeline section the both sides that pipeline is relative;
Every group of zinc ribbon anode connected between two groups of the one group pipeline section two ends homonymy corresponding with it and connected steel disc by cable respectively, connects steel disc and repeat to be connected steel disc between the unit between pipeline section with unit in this group and pass through cable series connection between two groups at these group pipeline section two ends in the same side.
6. the PCCP pipeline of the interactive cathodic protection of bilateral according to claim 5, is characterized in that:
Described unit repeats two groups of steel bands in pipeline section taking the main axis of described pipeline section as symmetry axis symmetry or near symmetrical setting;
Between described group, between two of seam crossing setting groups of groups, connect steel disc taking the main axis of described pipeline section as symmetry axis symmetry or near symmetrical setting, between described unit, seam crossing arranges and between two groups of unit, connects steel disc taking the main axis of described pipeline section as symmetry axis symmetry or near symmetrical setting;
Between described steel band, described zinc ribbon anode, described group, connect that between steel disc and described unit, to connect steel disc coplanar or approximate coplanar.
7. according to the PCCP pipeline of the interactive cathodic protection of the bilateral described in claim 5 or 6, it is characterized in that: described first group of repetition pipeline section and described second group of repetition pipeline section comprise that respectively the unit of 5 joint series arrangement and connection repeats pipeline section.
8. according to the PCCP pipeline of the interactive cathodic protection of the bilateral described in claim 5 or 6; it is characterized in that: the joint of other steel components outside described pipeline and described pipeline arranges bar-shaped zinc anode, described bar-shaped zinc anode connects the steel cylinder of described pipeline section by cable.
9. according to the PCCP pipeline of the interactive cathodic protection of bilateral described in claim 5 or 6, it is characterized in that: carry out electrical insulation at the first and last end of described pipeline, bifurcation and with the insulating material of installation two ends, the joint coating epoxy resin of external pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202846.3A CN103982752A (en) | 2014-05-14 | 2014-05-14 | Dual side interaction cathode protection method for PCCP (prestressed concrete cylinder pipe) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202846.3A CN103982752A (en) | 2014-05-14 | 2014-05-14 | Dual side interaction cathode protection method for PCCP (prestressed concrete cylinder pipe) |
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| CN103982752A true CN103982752A (en) | 2014-08-13 |
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| CN201410202846.3A Pending CN103982752A (en) | 2014-05-14 | 2014-05-14 | Dual side interaction cathode protection method for PCCP (prestressed concrete cylinder pipe) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109957804A (en) * | 2019-02-28 | 2019-07-02 | 国网陕西省电力公司电力科学研究院 | A kind of drainage method for buried metal pipeline near direct current grounding pole |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109957804A (en) * | 2019-02-28 | 2019-07-02 | 国网陕西省电力公司电力科学研究院 | A kind of drainage method for buried metal pipeline near direct current grounding pole |
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Application publication date: 20140813 |
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