CN2453208Y - Burried steel sleeve apparatus for steel pipeline cross rail-way or road - Google Patents
Burried steel sleeve apparatus for steel pipeline cross rail-way or road Download PDFInfo
- Publication number
- CN2453208Y CN2453208Y CN 00240956 CN00240956U CN2453208Y CN 2453208 Y CN2453208 Y CN 2453208Y CN 00240956 CN00240956 CN 00240956 CN 00240956 U CN00240956 U CN 00240956U CN 2453208 Y CN2453208 Y CN 2453208Y
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- sleeve pipe
- steel
- pipe
- pipeline
- main pipe
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Abstract
The utility model relates to a buried steel sleeve apparatus for steel pipelines cross railways or roads, which is most suitable for the buried steel transport pipeline of oil gas for long distances with a large caliber; when crossing the railway, a main pipeline is matched with a cement sleeve pipe which is provided with open pores on the surface and the 20% increased thickness on the basis of the original one and soil which is filled in the pipe. The wall thickness of the main pipeline is increased for 1 to 2 mm when crossing the road, and is matched with the steel sleeve pipe which is not provided with an anticorrosive coating and the soil filled in the pipe. The block to the external cathodic protection of the sleeve pipe is eliminated. The buried steel sleeve apparatus for steel pipelines cross railways or roads with the advantages of simple structure, less investment and convenient construction can effectively prevent the corrosion of the main pipeline which is arranged in the sleeve pipe, extend the service life of the buried steel pipeline cross the railway or the road.
Description
The utility model relates to the casing bit of buried steel pipeline railroad crossing, highway division, is particularly useful for underground heavy caliber, long corrosion protection apart from the steel pipe-line.
Relate to underground heavy caliber in the underground metal pipeline anticorrosion engineering, long at present apart from the steel pipe-line; its outer wall anti-corrosion generally all adopts insulating corrosion coating and impressed current cathodic protection (a small amount of, local pipeline section adopts the cathodic protection of anode loss protection) discharge protection, and the effect of cathodic protection is exactly to provide cathodic protection current to exempt the corrosion at this place to the anticorrosive coat fault location.For a long time, when steel pipe highway crossing and railway, the needs of protection pipeline all need add sleeve pipe when damaging the external anti-corrosion layer of pipeline and pipeline operation when preventing the pipeline crossing construction.The underground steel pipeline of railroad crossing section is generally used the cement sleeve pipe, and this kind sleeve pipe is formed by connecting from beginning to end by the more piece short sleeve of 2～3 meters of length again, and the seam between sleeve pipe and two ends, main pipe gap and the every trifle short sleeve all is provided with the waterproof sealing material layer; When passing through high-grade highway and expressway, with the steel sleeve pipe of outer wall belt anticorrosive coat, sleeve pipe and two ends, main pipe gap are provided with the waterproof sealing material layer; But in the pipeline running; because soil stress causes between sleeve pipe and the main pipe; relative displacement between the every trifle of cement sleeve pipe; add the influence of factors such as wearing out of waterproof sealing material; this sealing structure waterproofing effect is very undesirable; underground water is easy to from the sleeve pipe two ends or economizes on water respectively that seam crossing enters in the sleeve pipe between the mud sleeve pipe; and after underground water enters annular space between sleeve pipe and the pipeline; because cement sleeve pipe; the steel sleeve pipe of tape insulation anticorrosive coat has intercepted the cathodic protection current of external pipe cathodic protection system; main pipe can not get effective cathodic protection in the sleeve pipe, makes main pipe outer wall anticorrosive coat fault location produce corrosion.On-the-spot corrosion investigation shows that external anti-corrosion layer adopts the conveying crude oil of pitch-glass cloth structure, pipe to surpass the pipeline in 10 years age, and the sleeve pipe interior conduit has all produced serious corrosion.In sleeve pipe main pipe has been increased anode loss protection at present, purpose is behind water inlet submergence main pipe of the annular space between sleeve pipe and the main pipe and sacrificial anode, plays the protection main pipe for this reason.From on-the-spot use condition, this structure construction is installed difficulty, the corrosion protection difficult quality guarantee, and can't change after the sacrificial anode consumption.
The purpose of this utility model provides a kind of simple in structure, little investment, and easy construction can effectively prevent the buried steel pipeline railroad crossing of main pipe corrosion, the casing bit of highway division.
The casing bit of the utility model buried steel pipeline railroad crossing, highway division, it is made up of the sleeve pipe of the steel main pipe that is provided with anticorrosive coat and railroad crossing, highway division, two ends, gap between described sleeve pipe and the steel main pipe are uncovered, are provided with the land fill medium in the gap between sleeve pipe and the steel main pipe.Highway crossing section sleeve pipe is not for adding the steel sleeve pipe of anticorrosive coat, the wall thickness of main pipe thickens 1～2 millimeter in the sleeve pipe, railroad crossing section casing wall thickness is thickeied 20% cement sleeve pipe on the original basis, the cement sheath tube-surface is furnished with a plurality of circular holes at interval, and the interface slit between every trifle cement sleeve pipe need not seal.
The utility model buried steel pipeline railroad crossing; the casing bit of highway division; be best suited for underground heavy caliber; long corrosion protection apart from the steel pipe-line; main pipe and surperficial perforate during railroad crossing; wall thickness increases by 20% cement sleeve pipe and filling soil cooperation therebetween on the original basis; main pipe cooperates with steel sleeve pipe that does not add anticorrosive coat and filling soil therebetween during highway crossing; compared with prior art; eliminated the obstruct of sleeve pipe to outside cathodic protection current; main pipe has obtained effective cathodic protection in the sleeve pipe; it is simple in structure; little investment; construction install convenience; non-maintaining; can effectively prevent the corrosion of main pipe in the sleeve pipe, prolong railroad crossing; in the working life of highway division buried steel pipeline, has practicability widely.
Description of drawings:
Fig. 1 is the utility model steel casing bit schematic representation;
Fig. 2 is the utility model steel casing bit cathodic protection current distribution map.
Fig. 3 is the utility model cement sheath pipe arrangement schematic representation;
Fig. 4 is the utility model cement sheath pipe arrangement cathodic protection current distribution map.
Below in conjunction with accompanying drawing embodiment of the present utility model is further described:
Figure 1 shows that the casing bit of buried steel pipeline highway crossing section, it mainly is made up of steel main pipe 1, sleeve pipe 4 and land fill medium 2, highway crossing section sleeve pipe 4 is not for adding the steel sleeve pipe of anticorrosive coat, be furnished with anticorrosive coat 5 on steel main pipe 1 tube wall in it, main pipe 1 wall thickness in the steel sleeve pipe 4 thickens 1～2 millimeter on the original basis, be arranged at intervals with insulation supporter ring 3 on main pipe 1 tube wall, gap open at both ends between steel sleeve pipe 4 and the steel main pipe 1, filling soil media 2 in its gap.After cathodic protection current arrives sleeve pipe 4 outer walls by auxiliary anode soil media outside sleeve pipe; pass steel cover tube wall and arrive land fill medium 2 in the sleeve pipe 4; enter the outer wall of main pipe 1 by the fault location of steel main pipe 1 external anti-corrosion layer; make the outer wall of steel main pipe 1 obtain effective cathodic protection, as shown in Figure 2.
Figure 3 shows that the casing bit of buried steel pipeline railroad crossing section; it is mainly by steel main pipe 1; cement sleeve pipe 4 and land fill medium 2 are formed; the cement sleeve pipe 4 of railroad crossing section thickeies 20% on former basis; be furnished with a plurality of circular holes 6 on the cement sleeve pipe 4 at interval; interface slit 7 blow-by between every water saving mud sleeve pipe 4; be furnished with anticorrosive coat 5 on steel main pipe 1 outer wall in the cement sleeve pipe 4; the hole 6 of cement sheath tube-surface cloth is connected as a single entity cement sleeve pipe 4 inside and outside soil medias 2; cathodic protection current from auxiliary anode is a carrier with continuous soil media; pass through the cloth hole 6 on sleeve pipe 4 surfaces and arrive steel main pipe 1 outer wall anticorrosive coat fault location; and enter the outer wall of main pipe 1 from fault location; make the outer wall of main pipe 1 obtain effective cathodic protection, as shown in Figure 4.
Claims (3)
1. the casing bit of buried steel pipeline railroad crossing, highway division, it is made up of the sleeve pipe (4) of the steel main pipe (1) that is provided with anticorrosive coat (5) and railroad crossing, highway division, it is characterized in that: the two ends, gap between described sleeve pipe (4) and the steel main pipe (1) are uncovered, are provided with land fill medium (2) between sleeve pipe (4) and steel main pipe (1) tube wall.
2. the casing bit of buried steel pipeline railroad crossing according to claim 1, highway division, it is characterized in that: described highway crossing section sleeve pipe (4) is not for adding the steel sleeve pipe of anticorrosive coat, and the wall thickness of the interior main pipe of sleeve pipe (4) (1) thickens 1～2 millimeter.
3. the casing bit of buried steel pipeline railroad crossing according to claim 1, highway division, it is characterized in that: described railroad crossing section sleeve pipe (4) is to thicken 20% cement sleeve pipe on the original basis, be furnished with a plurality of circular holes (6) at interval on it, the interface slit (7) between every water saving mud sleeve pipe need not seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00240956 CN2453208Y (en) | 2000-11-09 | 2000-11-09 | Burried steel sleeve apparatus for steel pipeline cross rail-way or road |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00240956 CN2453208Y (en) | 2000-11-09 | 2000-11-09 | Burried steel sleeve apparatus for steel pipeline cross rail-way or road |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2453208Y true CN2453208Y (en) | 2001-10-10 |
Family
ID=33601506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00240956 Expired - Fee Related CN2453208Y (en) | 2000-11-09 | 2000-11-09 | Burried steel sleeve apparatus for steel pipeline cross rail-way or road |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2453208Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672298A (en) * | 2013-12-18 | 2014-03-26 | 西南石油大学 | Protective device for directional penetrating pipeline |
| CN105156838A (en) * | 2015-09-21 | 2015-12-16 | 常州大学 | Corrosion resistance method of buried casing internal pipeline |
| CN109367570A (en) * | 2018-11-15 | 2019-02-22 | 中铁第四勘察设计院集团有限公司 | A kind of dedicated armed lever and loading water structure of train water robot |
| CN109990142A (en) * | 2019-04-16 | 2019-07-09 | 广东华坤建设集团有限公司 | Pipe sleeve antiseep blocks up the research method of scheme in assembled arthitecutral structure |
-
2000
- 2000-11-09 CN CN 00240956 patent/CN2453208Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672298A (en) * | 2013-12-18 | 2014-03-26 | 西南石油大学 | Protective device for directional penetrating pipeline |
| CN103672298B (en) * | 2013-12-18 | 2015-07-15 | 西南石油大学 | Protective device for directional penetrating pipeline |
| CN105156838A (en) * | 2015-09-21 | 2015-12-16 | 常州大学 | Corrosion resistance method of buried casing internal pipeline |
| CN109367570A (en) * | 2018-11-15 | 2019-02-22 | 中铁第四勘察设计院集团有限公司 | A kind of dedicated armed lever and loading water structure of train water robot |
| CN109367570B (en) * | 2018-11-15 | 2024-05-28 | 中铁第四勘察设计院集团有限公司 | Special arm lever and water feeding structure of train water feeding robot |
| CN109990142A (en) * | 2019-04-16 | 2019-07-09 | 广东华坤建设集团有限公司 | Pipe sleeve antiseep blocks up the research method of scheme in assembled arthitecutral structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |