CN114351151A - Cathode protection system for crossing river section pipeline - Google Patents
Cathode protection system for crossing river section pipeline Download PDFInfo
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- CN114351151A CN114351151A CN202210066017.1A CN202210066017A CN114351151A CN 114351151 A CN114351151 A CN 114351151A CN 202210066017 A CN202210066017 A CN 202210066017A CN 114351151 A CN114351151 A CN 114351151A
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- river
- crossing
- pipeline
- anode
- linear
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- 238000004210 cathodic protection Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000011253 protective coating Substances 0.000 claims description 4
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
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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
-
- 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
- C23F13/10—Electrodes characterised by the structure
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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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
- F16L1/11—Accessories therefor, e.g. anchors for the detection or protection of pipes in the ground
-
- 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
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
- C23F2213/32—Pipes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a cathodic protection system for a pipeline crossing river sections, which comprises: a river crossing duct for being buried under a river bed so that the river crossing duct passes through a river; the arrangement direction of the linear anodes is consistent with that of the river crossing pipelines, and the linear anodes are arranged on the surface of a river bed and under the water of a river; an underwater counterweight connected to the linear anode for positioning the linear anode at the surface of the river bed. The invention can effectively carry out cathodic protection on the pipeline passing through the river.
Description
Technical Field
The invention relates to the technical field of pipeline corrosion prevention, in particular to a cathodic protection system for a pipeline crossing river sections.
Background
When a long-distance pipeline passes through a river, in order to save cost and meet the requirement of environmental protection, construction is generally carried out in a directional crossing mode. Although directional crossing has the advantages of small working surface, small excavation amount, small influence on environment and the like, in the back dragging process of the pipeline, particularly in a rock stratum, the problems of unsmooth holes, low direction control precision and the like often occur, so that an anti-corrosion layer of the pipeline is damaged, sometimes, a metal pipe body is even exposed, and the damage is generally unrepairable. In this case, the directional drilling through the section of the pipe is unavoidable for damage of the corrosion protection layer, and therefore cathodic protection of the directional drilling through the section of the pipe is very necessary.
At the present stage, because most of the two ends of the crossing section do not use available power sources, the conventional cathode protection mode is to arrange sacrificial anodes at the two ends of the directional crossing pipeline for protection, the mode is only suitable for penetrating short buried pipelines with small pipe diameters, and the problem of insufficient protection can occur for the crossing pipelines with large-diameter pipelines, long crossing sections, more underground rock layers and serious pipeline coating damage; even if the power supply condition allows, the protection effect of the protection method using the external current protection of the deep well anode at the two ends of the pipeline remains to be questioned as a cathode protection difficulty for the pipeline.
Disclosure of Invention
The present invention provides a cathodic protection system for a river-section crossing duct, which can effectively cathodically protect the river-crossing duct.
In order to solve the above technical problems, the present invention provides a cathodic protection system for crossing a river segment pipeline, comprising:
a river crossing duct for being buried under a river bed so that the river crossing duct passes through a river;
the arrangement direction of the linear anodes is consistent with that of the river crossing pipelines, and the linear anodes are arranged on the surface of a river bed and under the water of a river;
an underwater counterweight connected to the linear anode for positioning the linear anode at the surface of the river bed.
Preferably, the underwater counterweight is a counterweight.
Preferably, in the above technical solution, the number of the balancing weights is plural, and the plural balancing weights are arranged at equal intervals along the length direction of the linear anode.
Preferably, the cathodic protection system further comprises a potentiostat, and the potentiostat is electrically connected to the river-crossing pipeline and the linear anode, respectively.
Preferably, in the above technical solution, the potentiostat is a solar potentiostat.
Preferably, the potentiostat is electrically connected to the river-crossing pipeline through a reference electrode.
Preferably, the reference electrode is a saturated Cu/SO4 reference electrode.
Preferably, the surface of the river-crossing pipeline is provided with a protective coating.
Preferably, in the above technical solution, the length of the linear anode corresponds to the length of the river crossing duct.
Preferably, the linear anode is a specially-made linear anode used underwater, the specially-made linear anode comprises an anode cable, the MMO filament anode is arranged inside the anode cable in a penetrating mode, and the outer side of the anode cable is provided with a porous plastic pipe in a compounding mode.
The invention provides a cathodic protection system for a pipeline crossing river sections, which comprises a river-crossing pipeline, a linear anode and an underwater counterweight, wherein the river-crossing pipeline is generally buried below a river bed and penetrates through the whole river from the side surface, the linear anode is arranged along the river-crossing pipeline so that the arrangement direction of the linear anode is consistent with that of the river-crossing pipeline, specifically, the river-crossing pipeline and the linear anode can be in a parallel state, the linear anode is arranged under the river and positioned on the surface of the river bed during arrangement, in addition, the linear anode is also connected with the underwater counterweight, and the linear anode is positioned at the bottom of the river by the underwater counterweight so as to prevent displacement under the action of water flow. The invention can effectively provide effective cathode protection for the river-crossing pipeline by arranging the linear anode in the river, and prolongs the service life of the river-crossing pipeline.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
FIG. 1 is a schematic diagram showing a cathodic protection system for a river-crossing pipeline according to an embodiment of the present invention;
in the figure: 1. a reference electrode; 2. a potentiostat; 3. a linear anode; 4. underwater counterweight; 5. and (4) passing through a river pipeline.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a cathodic protection system for crossing a river segment pipeline, including:
a river crossing duct 5, the river crossing duct 5 being for being buried under a river bed so that the river crossing duct 5 crosses a river;
the linear anode 3, the laying direction of the linear anode 3 is consistent with that of the river-crossing pipeline 5, and the linear anode 3 is arranged on the surface of the river bed and under the river;
and an underwater counterweight 4 connected with the linear anode 3 for positioning the linear anode 3 on the surface of the river bed.
The cathodic protection system for crossing river channel pipeline provided by this embodiment comprises a river crossing pipeline 5, a linear anode 3 and an underwater counterweight 4, wherein the river crossing pipeline 5 is generally buried under the river bed, and the river crossing pipeline 5 passes through the whole river from the side, the linear anode 3 is arranged along the river crossing pipeline 5, so that the arrangement direction of the linear anode 3 is consistent with that of the river crossing pipeline 5, specifically, the river crossing pipeline 5 and the linear anode 3 can be in parallel, the linear anode 3 is arranged under the river and on the surface of the river bed during the arrangement, in addition, the linear anode 3 is connected with the underwater counterweight 4, the linear anode 3 is positioned at the bottom of the river by the underwater counterweight 4, so as to prevent the displacement under the action of water flow, the cathodic protection system for crossing river channel provided by this embodiment has simple arrangement of the linear anode 3, compared with the prior art that effective cathodic protection cannot be provided for the pipeline penetrating through the river, the arrangement of the linear anode 3 in the river can effectively provide effective cathodic protection for the river-penetrating pipeline 5, and the service life of the river-penetrating pipeline 5 is prolonged.
In a further possible embodiment of this embodiment, the underwater weight 4 is a counterweight.
The underwater counterweight 4 in this embodiment is a counterweight block, which can facilitate the arrangement of the underwater counterweight 4.
In a further implementation manner of this embodiment, the number of the balancing weights is multiple, and the multiple balancing weights are disposed at equal intervals along the length direction of the linear anode 3.
A plurality of balancing weights in this embodiment set up along linear anode 3's length direction equidistant can play better positioning action to linear anode 3, and it can be so that linear anode 3 remain throughout and cross the relative position of river pipeline 5.
In a further embodiment of the present embodiment, the cathodic protection system further comprises a potentiostat 2, the potentiostat 2 being electrically connected to the river-crossing duct 5 and the linear anode 3, respectively.
The potentiostat 2 in this embodiment can be used as a power supply, and the potentiostat 2 is electrically connected to the linear anodes 3, respectively, and can provide stable current for the whole cathodic protection system, thereby preventing current instability from affecting the cathodic protection effect.
In a further possible implementation of the present embodiment, the potentiostat 2 is a solar potentiostat.
The potentiostat 2 in this embodiment is a solar potentiostat, which provides a stable current for the linear anode 3 by converting solar energy into electric energy of a power supply, and can solve the problem of inconvenience in power supply in a river-crossing pipeline environment and the problem of power supply of an impressed current system.
In a further embodiment of this embodiment, the potentiostat 2 is electrically connected to the river crossing pipe 5 via the reference electrode 1.
In this embodiment, the reference electrode 1 is electrically connected to the river-crossing pipe 5, which facilitates the control of the current passing through the linear anode 3.
In a further possible implementation of this example, reference electrode 1 is a saturated Cu/SO4 reference electrode.
Reference electrode 1 in this example was a saturated Cu/SO4 reference electrode, which reference electrode 1 was more accurate and more stable.
In a further possible embodiment of this embodiment, the surface of the river crossing duct 5 is provided with a protective coating.
The surface of river crossing pipeline 5 is provided with protective coating in this embodiment and it can play better guard action to river crossing pipeline 5, promotes the life of river crossing pipeline 5.
In a further possible embodiment of this embodiment, the length of the linear anode 3 corresponds to the length of the river crossing duct 5.
The length of linear anode 3 in this embodiment corresponds with the length of river crossing pipeline 5 and guarantees that each section of pipeline section all can reach cathodic protection effect, even the coating damage is serious, also can satisfy the electric current demand.
In a further implementation manner of the present embodiment, the linear anode 3 is a specially-made linear anode for underwater use, the specially-made linear anode includes an anode cable, the MMO filament anode is threaded inside the anode cable, and a porous plastic pipe is compositely arranged outside the anode cable.
In the embodiment, the underwater specially-made linear anode is adopted to output large current, the structure is more stable, and the service life is longer.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A cathodic protection system for a river-section crossing pipeline, comprising:
a river crossing duct for being buried under a river bed so that the river crossing duct passes through a river;
the arrangement direction of the linear anodes is consistent with that of the river crossing pipelines, and the linear anodes are arranged on the surface of a river bed and under the water of a river;
an underwater counterweight connected to the linear anode for positioning the linear anode at the surface of the river bed.
2. The system of claim 1, wherein the underwater weight is a counterweight.
3. The system of claim 2, wherein the number of the balancing weights is multiple, and the balancing weights are arranged at equal intervals along the length direction of the linear anode.
4. The cathodic protection system for a river crossing pipeline according to claim 1, further comprising a potentiostat electrically connected to the river crossing pipeline and the linear anode, respectively.
5. The cathodic protection system for a river crossing pipeline as set forth in claim 4 wherein said potentiostat is a solar potentiostat.
6. The cathodic protection system for a river crossing pipeline as set forth in claim 4 wherein said potentiostat is electrically connected to said river crossing pipeline via a reference electrode.
7. The cathodic protection system for a river segment crossing pipeline as recited in claim 6 wherein the reference electrode is a saturated Cu/SO4 reference electrode.
8. The river course crossing cathodic protection system of claim 1 wherein the surface of the river course crossing pipeline is provided with a protective coating.
9. The river course crossing cathodic protection system of claim 1 wherein the length of said linear anode corresponds to the length of said river course crossing pipeline.
10. The cathodic protection system for pipeline crossing river reach according to claim 1, wherein the linear anode is a specially made linear anode used under water, the specially made linear anode comprises an anode cable, the inside of the anode cable is penetrated with MMO filament anode, and the outside of the anode cable is compounded with a porous plastic pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210066017.1A CN114351151A (en) | 2022-01-20 | 2022-01-20 | Cathode protection system for crossing river section pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210066017.1A CN114351151A (en) | 2022-01-20 | 2022-01-20 | Cathode protection system for crossing river section pipeline |
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| CN114351151A true CN114351151A (en) | 2022-04-15 |
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|---|---|---|---|
| CN202210066017.1A Pending CN114351151A (en) | 2022-01-20 | 2022-01-20 | Cathode protection system for crossing river section pipeline |
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