CN102072360B - Pipe-jacking cathode protection embedding device and embedding method thereof - Google Patents
Pipe-jacking cathode protection embedding device and embedding method thereof Download PDFInfo
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- CN102072360B CN102072360B CN200910199310.XA CN200910199310A CN102072360B CN 102072360 B CN102072360 B CN 102072360B CN 200910199310 A CN200910199310 A CN 200910199310A CN 102072360 B CN102072360 B CN 102072360B
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Abstract
The invention discloses a pipe-jacking cathode protection embedding method. The method is characterized by comprising the following steps of: reserving a hole in a protected pipeline; and jacking an anode block or a cable sleeve out of the protected pipeline by adopting a vertical pipe jacking method in the protected pipeline. By using the method, the problem that a metal pipeline cathode protection device is difficult to lay and replace when crossing rivers, lakes and seas in pipe-jacking construction are solved. The method is developed aiming at that the anode block and a connecting cable cannot be embedded when performing pipe-jacking on the metal pipeline, has the characteristics that the structure is simple, the method is convenient to construct, and the cost is low. A pipe-jacking metal pipeline can be maintained better, and the service life thereof can be prolonged.
Description
Technical field:
The invention belongs to metallic conduit cathodic protection and jacking construction field, be specifically related to one when jacking construction, the embedded device of metallic pipe cathode protector and method for embedding thereof.
Background technique:
Pipe jacking construction technique is a kind of trenchless technology of laying pipeline underground of better protection of the environment.Under the condition of its soil layer construction outside not disturbance or slight disturbance pipe, by means of the thrust of the jacking devices such as main top oil pump, tool pipe or development machine are entered to received well from active well through soil layer along the line.Therefore, push pipe pipeline generally lays darker, below ground 5m～20m, and what have often passes through rivers,lakes and seas, and these pipelines are generally important, will rectificate working life, require these metallic conduits to carry out cathodic protection.
Cathodic protection is make metal surface become the negative electrode of electrochemical cell and reach a less technology of its corrosion rate.Mainly contain two kinds of patterns of sacrificial anode negative electrode and impressed current.Galvanic anode protection system is that the metal that current potential is born is connected with protected pipeline by cable; and with being placed in the middle of soil; form corrosion cell; by soil, to the protected pipeline of current potential calibration, provide cathode current; and make its negative electrode; realize cathodic protection, the continuous oxidized consumption of anode material in this course, Here it is sacrificial anode.Impressed current cathodic protection system is that negative pole cable and the protected pipeline of DC electrical source connected, and anodal and auxiliary anode is connected, and auxiliary anode contacts with its soil around, just forms a loop.DC electrical source is carried cathode current to protected pipeline, makes it negative electrode and reaches certain protection potential, thereby reach the object of cathodic protection.
No matter be sacrificial anode or impressed current cathodic protection system, all need to realize the connection of cable and protected pipeline, and in sacrificial anode system, anode block also needs periodic replacement, so that lasting cathodic protection current to be provided.In excavation pipe laying, cable generally welds and buries underground anode block in when fluting with the outer wall of pipeline, constructs more for convenience.And during jacking construction, pipe laying is darker, by earth's surface excavation, often difficulty comparatively of conjunction cable outside pipeline, invest very high, when passing through rivers and bay, or even completely impossible.
Summary of the invention:
The object of the present invention is to provide a kind of pipe-jacking cathode protection embedding device, in the time of can solving jacking construction, comprise while passing through rivers,lakes and seas, metallic pipe cathode protector lays and changes difficult problem.
In order to realize this purpose; technological scheme of the present invention is: a kind of pipe-jacking cathode protection embedding device; it is characterized in that in protected pipeline preformed hole hole; reserved stainless steel short tube is installed in hole; in reserved short-pipe, wear cable stainless steel sleeve pipe, this cable stainless steel sleeve pipe ejects to pipeline outside vertical from protected pipe interior again, and cable is arranged in stainless steel sleeve pipe; one end of cable is connected with anode block, and the cable the other end is connected with protected inner-walls of duct.Between reserved short-pipe and protected pipeline reserving hole, be threaded, between cable stainless steel sleeve pipe also for being threaded.
Another object of the present invention is to provide a kind of push pipe cathodic protection method for embedding, in the time of can solving jacking construction, comprise while passing through rivers,lakes and seas, metallic pipe cathode protector lays and changes difficult problem.
In order to realize this purpose, technological scheme of the present invention is: a kind of push pipe cathodic protection method for embedding, it is characterized in that at protected pipeline reserving hole, and at protected pipe interior, take vertical pipe jacking method that anode block or cable sleeve are ejected to protected pipeline.According to one embodiment of present invention, the method comprises the following steps: A, protected pipeline reserving hole, be equipped with reserved stainless steel short tube, the pipe plug shutoff of pipeline outside in hole; After B, protected pipeline jacking complete, cut reserved short-pipe pipe plug; C, from protected pipe interior to pipeline, outside slowly ejects cable stainless steel sleeve pipe, top is to till approaching anode block and burying absolute altitude underground, sleeve pipe segmentation ejects, employing is threaded, when pushing up to last section, at stainless steel reserved short-pipe mouth, embed bowl-type rubber water-proof circle, form sealing with cable stainless steel sleeve pipe; D, cable is worn to protected pipeline along stainless steel sleeve pipe in the groove of ground excavation, and at sleeve pipe two ends, filled out embedding epoxy sealing, stainless steel pipe plug waterproof in last two end cap.According to another embodiment of the present invention, the method comprises the following steps: A, protected pipeline reserving hole, and because reserving hole need eject anode block, require size relatively large, metallic conduit reserving hole needs to carry out reinforcement around.Stainless steel reserved short-pipe is housed, the pipe plug shutoff of pipeline outside in hole; After B, protected pipeline jacking complete, cut reserved short-pipe pipe plug; C, anode block bottom conjunction cable, cable penetrates in cable stainless steel sleeve pipe, and anode block and cable stainless steel sleeve pipe are connected and are outwards ejected by protected pipeline, then at stainless steel reserved short-pipe mouth, embed rubber water-proof circle, form sealing; D, in cable sleeve lower end, fill out embedding epoxy sealing, and need to adopt metal tube block stifled.
For the darker feature of push pipe pipe laying, before metallic conduit jacking precalculated cable connect or anode block lay position, and on protected pipeline reserving hole.After jacking construction completes, at protected pipe interior, take vertical pipe jacking method that anode block or cable sleeve are ejected to protected pipeline, and carry out sealing and anti-corrosion measure.While the present invention be directed to metallic conduit push pipe, cannot bury anode block underground and conjunction cable is developed, there is simple structure, easy construction, feature with low cost.Can safeguard better push pipe metallic conduit, extend its working life.
Accompanying drawing explanation
Fig. 1 is the structural representation of protected pipeline preformed hole
Fig. 2 is the schematic diagram of one embodiment of the invention
Fig. 3 is the structural representation of bowl-type water proof rubber circle in Fig. 2
Fig. 4 is that protected pipeline inner cable lays detail drawing
Fig. 5 is the schematic diagram of another embodiment of the present invention
Embodiment
The drawings and specific embodiments according to the present invention are described below.
Fig. 1 is the structural representation of protected pipeline preformed hole.Before jacking construction, according to the design of cathode protection device, reserving hole on push pipe metallic conduit 10; the size of hole is reserved according to the size of anode block or cable sleeve; in hole, be provided with reserved short-pipe 1, and fill out capel epoxy resins 3 and seal, pipeline is pipe plug 2 shutoff reserved short-pipes 1 for outside.Preformed hole as shown in Figure 1.For not hindering the fluid conveying function of protected pipeline jacking and pipeline, in the outstanding pipeline of reserved short-pipe 1, outside is all unsuitable excessive.If preformed hole is larger, also need be in hole Zhou Jinhang reinforcement.
Fig. 2 is land push pipe buried depth scheme.In this scheme; in reserved short-pipe, be provided with cable stainless steel sleeve pipe; from protected pipe interior to pipeline, outside extend out to anode block position to this cable stainless steel sleeve pipe; cable is arranged in stainless steel sleeve pipe; one end of cable is connected with anode block; the cable the other end is positioned at protected pipeline, is connected with tube wall.Between reserved short-pipe and protected pipeline reserving hole, be threaded, between cable stainless steel sleeve pipe also for being threaded.After protected pipeline jacking completes, cut the pipe plug 2 of reserved short-pipe 1, and outside slowly ejects cable stainless steel sleeve pipe 4 from protected pipe interior to pipeline, top is to till approaching anode block and burying absolute altitude underground.Sleeve pipe segmentation ejects, and employing is threaded, and when pushing up to last section, at stainless steel short tube mouth, embeds bowl-type rubber water-proof circle 9, forms sealing.Cable 5 is worn to protected pipeline along stainless steel sleeve pipe 4 in the groove of ground excavation, and at sleeve pipe two ends, filled out capel epoxy resins 7 and seal, pipe plug 6 and 8 waterproof in last two end cap.It is that in Fig. 2, A place and water-tight are the enlarged view at B place in Fig. 2 that Fig. 3 and Fig. 4 show cable laying.Cable 5 adopts welding 14 with protected pipeline, and covers epoxy coating 13, in coating, pastes with single-coated foam 12 again, applies slush coating 15 anticorrosion on adhesive tape 12 again.In sum, during push pipe, anode block can be embedded in below more shallow earth's surface by excavation on land.By cable, be connected with protected pipeline, after sacrificed anticathode, can change again anode block, and need not be excavated to protected pipeline.11 is anticorrosive coat.
Fig. 5 is push pipe while passing through rivers or bay, and anode block is buried scheme underground.When push pipe passes through rivers,lakes and seas, ground cannot be excavated and be buried anode block underground, and anode block 16 also need eject outward from protected pipe interior.Therefore,, after protected pipeline jacking completes, cut reserved short-pipe pipe plug; Anode block 16 bottom conjunction cables, cable 5 penetrates in cable stainless steel sleeve pipe 4, and anode block 16 and cable stainless steel sleeve pipe 4 are connected and are outwards ejected by protected pipeline 10, then 4 mouthfuls of cable stainless steel short tubes, embed rubber water-proof circle, form sealing; Because reserving hole requires size relatively large, need to carry out in advance reinforcement 16 around to protected pipeline reserving hole.And cable sleeve also needs the pipe plug that adopts intensity larger.The layout of anode block and cable as shown in Figure 5.Anode block and cable sleeve are connected and are outwards ejected by protected pipeline, complete sealing and anticorrosive work after having ejected again.Preformed hole and cable are connected with reference to Fig. 1 and Fig. 4 with protected pipeline.In this embodiment, the diameter of anode block 16 is generally at 80～150mm.
In sum, while the present invention be directed to metallic conduit push pipe, cannot bury anode block underground and conjunction cable is developed, there is simple structure, easy construction, feature with low cost.Can safeguard better push pipe metallic conduit, extend its working life.
Claims (2)
1. a push pipe cathodic protection method for embedding, is characterized in that the method comprises the following steps: A, protected pipeline reserving hole, be equipped with reserved stainless steel short tube, the pipe plug shutoff of pipeline outside in hole; After B, protected pipeline jacking complete, cut reserved short-pipe pipe plug; C, from protected pipe interior to pipeline, outside slowly ejects cable stainless steel sleeve pipe, top is to till approaching anode block and burying absolute altitude underground, sleeve pipe segmentation ejects, employing is threaded, when pushing up to last section, at stainless steel reserved short-pipe mouth, embed bowl-type rubber water-proof circle, form sealing with cable stainless steel sleeve pipe; D, cable is worn to protected pipeline along cable stainless steel sleeve pipe in the groove of ground excavation, and at sleeve pipe two ends, filled out embedding epoxy sealing, stainless steel pipe plug waterproof in last two end cap.
2. a push pipe cathodic protection method for embedding, it is characterized in that the method comprises the following steps: A, protected pipeline reserving hole, because reserving hole need eject anode block, metallic conduit reserving hole needs to carry out reinforcement around, stainless steel reserved short-pipe is housed, the pipe plug shutoff of pipeline outside in hole; After B, protected pipeline jacking complete, cut reserved short-pipe pipe plug; C, anode block bottom conjunction cable, cable penetrates in cable stainless steel sleeve pipe, and anode block and cable stainless steel sleeve pipe are connected and are outwards ejected by protected pipeline, then at stainless steel reserved short-pipe mouth, embed rubber water-proof circle, form sealing; D, in cable stainless steel sleeve pipe lower end, fill out embedding epoxy sealing, and need to adopt metal tube block stifled.
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| CN200910199310.XA CN102072360B (en) | 2009-11-24 | 2009-11-24 | Pipe-jacking cathode protection embedding device and embedding method thereof |
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| CN200910199310.XA CN102072360B (en) | 2009-11-24 | 2009-11-24 | Pipe-jacking cathode protection embedding device and embedding method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103060814B (en) * | 2011-10-24 | 2014-12-10 | 中国科学院金属研究所 | Construction method of feeding device for underground pipeline system |
| CN102586784B (en) * | 2012-03-14 | 2013-08-14 | 中国海洋石油总公司 | Method for assembling direct current cathode protection system outside platform |
| CN106907544B (en) * | 2017-02-28 | 2018-08-14 | 中国十七冶集团有限公司 | A kind of outer wall of basement discards the method for blocking of pre-buried pipeline |
| CN107482567A (en) * | 2017-09-22 | 2017-12-15 | 山东电力建设第工程公司 | A kind of buried cable fire-proof and water-proof sealing device |
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|---|---|---|---|---|
| CN2707776Y (en) * | 2004-04-01 | 2005-07-06 | 大庆开发区东油新技术有限公司 | Anti-theft sacrificial anode used for above grade pipe line |
| CN101397673A (en) * | 2007-09-30 | 2009-04-01 | 濮阳市信宇石油机械化工有限公司 | Sacrificial anode and protective cathode-casing tube anti-corrosive apparatus |
| CN101892486A (en) * | 2009-10-26 | 2010-11-24 | 上海青草沙投资建设发展有限公司 | Construction method of feed device for large-diameter pipeline for trenchless construction |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54116731A (en) * | 1978-03-02 | 1979-09-11 | Toshiba Corp | Piping device |
| JPS63166983A (en) * | 1986-12-27 | 1988-07-11 | Nishihara Eisei Kogyosho:Kk | Method for preventing generation of reddish water |
| NO307096B1 (en) * | 1997-11-17 | 2000-02-07 | Aker Offshore Partner As | Corrosion-protected metal construction, for example in the form of a pipeline which may be part of a stronger pipe system |
| JP2002282810A (en) * | 2001-03-27 | 2002-10-02 | Daiki Engineering Kk | Contamination prevention device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2707776Y (en) * | 2004-04-01 | 2005-07-06 | 大庆开发区东油新技术有限公司 | Anti-theft sacrificial anode used for above grade pipe line |
| CN101397673A (en) * | 2007-09-30 | 2009-04-01 | 濮阳市信宇石油机械化工有限公司 | Sacrificial anode and protective cathode-casing tube anti-corrosive apparatus |
| CN101892486A (en) * | 2009-10-26 | 2010-11-24 | 上海青草沙投资建设发展有限公司 | Construction method of feed device for large-diameter pipeline for trenchless construction |
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