CN203809954U - Bilateral interactive cathode protected PCCP (prestressed concrete cylinder pipe) - Google Patents
Bilateral interactive cathode protected PCCP (prestressed concrete cylinder pipe) Download PDFInfo
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- CN203809954U CN203809954U CN201420247739.8U CN201420247739U CN203809954U CN 203809954 U CN203809954 U CN 203809954U CN 201420247739 U CN201420247739 U CN 201420247739U CN 203809954 U CN203809954 U CN 203809954U
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- Prior art keywords
- pipeline
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- pipeline section
- steel
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- 230000002146 bilateral effect Effects 0.000 title claims abstract description 18
- 230000002452 interceptive effect Effects 0.000 title claims abstract description 15
- 239000011513 prestressed concrete Substances 0.000 title abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 96
- 239000010959 steel Substances 0.000 claims abstract description 96
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000011701 zinc Substances 0.000 claims abstract description 49
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 49
- 239000004567 concrete Substances 0.000 claims abstract description 15
- 230000001681 protective effect Effects 0.000 claims abstract description 6
- 239000011083 cement mortar Substances 0.000 claims abstract description 5
- 238000004210 cathodic protection Methods 0.000 claims description 17
- 230000002787 reinforcement Effects 0.000 claims description 13
- 238000002788 crimping Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000010292 electrical insulation Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 5
- 239000010410 layer Substances 0.000 abstract 3
- 239000011241 protective layer Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000010405 anode material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Prevention Of Electric Corrosion (AREA)
Abstract
The utility model belongs to the field of municipal water supply and drainage and particularly relates to a PCCP (prestressed concrete cylinder pipe) with a cathode protective structure, namely a bilateral interactive cathode protected PCCP applicable to anti-corrosion engineering of long-range water pipes. The bilateral interactive cathode protected PCCP comprises pipe segments; each pipe segment comprises an inner concrete layer, a steel barrel, a middle concrete layer, prestressed steel wires, and an outer cement mortar protective layer sequentially from inside to outside; two groups of connecting steel sheets are arranged at the joint of each two adjacent pipe segments; two groups of steel strips are further disposed between each middle concrete layer and the corresponding prestressed wires in a direction parallel to the pipe; two groups of zinc ribbon anodes are disposed interactively on two sides of each pipe segment in a direction parallel to the pipe. By the use of the bilateral interactive cathode protected PCCP according to the technical scheme, engineering investment can be saved effectively by about 30%.
Description
Technical field
The utility model belongs to municipal plumbing field, relates in particular to a kind of PCCP pipeline with cathodic protection structure, 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; steel component connection part at 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.
This patent is parallel PCCP piping laying one ribbon zinc anode; zinc band be take 30m as a unit; adjacent two zinc bands are placed on pipe both sides alternately; two ends are electrically connected to corresponding pipe by cable; PCCP pipeline adopts steel component joint; can be electrically connected to, according to designing requirement, adopt bar-shaped zinc anode protection.This kind of method, when reaching complete preservation PCCP pipeline, can effectively be saved 30% construction investment.
Model utility content
For solving the deficiencies in the prior art, the utility model provides the PCCP pipeline of the interactive cathodic protection of a kind of bilateral.This kind of pipeline, when realizing complete preservation PCCP pipeline, can effectively be saved investment, is the anticorrosion technical foundation that provides of other water supply lines simultaneously.
The PCCP pipeline of the interactive cathodic protection of a kind 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 to skin, comprises successively internal layer concrete layer by internal layer, 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, two groups of steel bands are also set in the direction parallel with pipeline, described steel band and described steel wire crimping, and the place, two ends that repeats pipeline section in unit is connected with described steel cylinder;
Between described group, connect and between steel disc, described unit, connect steel disc and connect described firm band, reinforcement wire or the steel cylinder that two adjacent joint unit repeat pipeline sections;
At first group described in each section one group of zinc ribbon anode of outer installment that repeats pipeline 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 second group described in each section one group of zinc ribbon anode of outer installment that repeats pipeline 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, from side-looking face, are seen as and are arranging along being parallel to alternatively up and down, front and back the direction of PCCP pipeline.Zinc band two ends are electrically connected to corresponding pipeline by cable, and the steel cylinder in PCCP pipeline and prestressed reinforcement are protected.
Preferably, described unit repeats two groups of steel bands in pipeline section to take the main axis of described pipeline section is symmetry axis symmetry or near symmetrical setting; Between described group, between two of seam crossing setting groups of groups, connecting steel disc, to take the main axis of described pipeline section be symmetry axis symmetry or near symmetrical setting, and between described unit, seam crossing arranges and between two groups of unit, connects steel disc to take the main axis of described pipeline section be 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 be take 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 industry standard.
Preferably, on described pipeline, be also provided with steel component, in the joint of described pipeline and described steel component, bar-shaped zinc anode is set, described bar-shaped zinc anode connects the steel cylinder of described pipeline section by cable, and described bar-shaped zinc anode connects the steel cylinder of described pipeline section by cable.Described steel component is exhaust valve pit, emptying valve pit, connection facility, bleeder or elbow.
At pipeline section 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 to building separately, protects, reach banded and bar-shaped zinc reasonable combination application.
Preferably, 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, carry out electrical insulation.
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, to controlling corrosion, has played effect, 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 of great importance to extending the working life of pipeline.
Accompanying drawing explanation
Fig. 1 is the structural representation at 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, and 12, second groups are repeated pipeline sections, and 13, seam crossing between unit; 14, seam crossing between group, 15, main axis.
Embodiment
Below principle of the present utility model and feature are described, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
In a concrete mode of execution, as shown in Figure 1, the PCCP pipeline of the interactive cathodic protection of a kind of bilateral, comprise 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 to skin, comprises successively internal layer concrete layer 1 by internal layer, 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 steel wire crimping, and be connected with described steel cylinder at the place, two ends of unit repetition pipeline section; Between described group, connect and between steel disc, described unit, connect steel disc and connect described firm band, reinforcement wire or the steel cylinder that two adjacent joint unit repeat pipeline sections.
At first group described in each section one group of zinc ribbon anode of outer installment that repeats pipeline 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 second group described in each section one group of zinc ribbon anode of outer installment that repeats pipeline 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 take the main axis of described pipeline section and is symmetrical arranged as symmetry axis.Between described group, between two of seam crossing setting groups of groups, connecting steel disc, to take the main axis of described pipeline section be symmetry axis symmetry or near symmetrical setting, and between described unit, seam crossing arranges and between two groups of unit, connects steel disc and take the main axis of described pipeline section and be symmetrical arranged 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, during prestressed concrete pipe road (PCCP pipe) cathodic protection, tackle prestressed reinforcement and steel cylinder carries out electric continuity connection, also guarantee that the longitudinal steel bar of each pipe joint joins end to end simultaneously, otherwise protective system is difficult, become loop.With technological scheme provided by the utility model, PCCP pipe has on the make adopted two steel bands of crimping under steel wire, and steel band is welded at PCCP pipe end and steel cylinder, guarantees the electric continuity of cathodic protection current between prestressed reinforcement and steel cylinder.Meanwhile, be to guarantee the electric continuity between PCCP pipe, the connection steel disc by seam crossing between two adjacent pipeline sections carries out electric continuity cross-over connection to every joint PCCP pipe.
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 utility model adopts at pipe two ends coating epoxy resin insulation material and realizes.
For guaranteeing daily management and the maintenance of test point, the utility model 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 utility model 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 is 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 better embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. the PCCP pipeline of the interactive cathodic protection of a 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 to skin, comprises successively internal layer concrete layer by internal layer, 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, two groups of steel bands are also set in the direction parallel with pipeline, described steel band and described steel wire crimping, and the place, two ends that repeats pipeline section in unit is connected with described steel cylinder;
Between described group, connect and between steel disc, described unit, connect steel disc and connect described steel band, reinforcement wire or the steel cylinder that two adjacent joint unit repeat pipeline sections;
At first group described in each section one group of zinc ribbon anode of outer installment that repeats pipeline 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 second group described in each section one group of zinc ribbon anode of outer installment that repeats pipeline 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.
2. the PCCP pipeline of the interactive cathodic protection of bilateral according to claim 1, is characterized in that:
Described unit repeats two groups of steel bands in pipeline section, and to take the main axis of described pipeline section be symmetry axis symmetry or near symmetrical setting;
Between described group, between two of seam crossing setting groups of groups, connecting steel disc, to take the main axis of described pipeline section be symmetry axis symmetry or near symmetrical setting, and between described unit, seam crossing arranges and between two groups of unit, connects steel disc to take the main axis of described pipeline section be 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.
3. the PCCP pipeline of the interactive cathodic protection of bilateral according to claim 1 and 2, 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.
4. the PCCP pipeline of the interactive cathodic protection of bilateral according to claim 1 and 2; it is characterized in that: on described pipeline, be also provided with steel component; in the joint of described pipeline and described steel component, bar-shaped zinc anode is set, described bar-shaped zinc anode connects the steel cylinder of described pipeline section by cable.
5. the PCCP pipeline of the interactive cathodic protection of bilateral according to claim 1 and 2, is characterized in that: 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, carry out electrical insulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420247739.8U CN203809954U (en) | 2014-05-14 | 2014-05-14 | Bilateral interactive cathode protected PCCP (prestressed concrete cylinder pipe) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420247739.8U CN203809954U (en) | 2014-05-14 | 2014-05-14 | Bilateral interactive cathode protected PCCP (prestressed concrete cylinder pipe) |
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| Publication Number | Publication Date |
|---|---|
| CN203809954U true CN203809954U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420247739.8U Expired - Lifetime CN203809954U (en) | 2014-05-14 | 2014-05-14 | Bilateral interactive cathode protected PCCP (prestressed concrete cylinder pipe) |
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| Country | Link |
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| CN (1) | CN203809954U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148968A (en) * | 2016-08-04 | 2016-11-23 | 盐城工学院 | A kind of cathode protecting process and device |
| 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 |
-
2014
- 2014-05-14 CN CN201420247739.8U patent/CN203809954U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106148968A (en) * | 2016-08-04 | 2016-11-23 | 盐城工学院 | A kind of cathode protecting process and device |
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |