CN101260525A - Oil gas transmission pipeline protection device - Google Patents
Oil gas transmission pipeline protection device Download PDFInfo
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- CN101260525A CN101260525A CNA2008100475240A CN200810047524A CN101260525A CN 101260525 A CN101260525 A CN 101260525A CN A2008100475240 A CNA2008100475240 A CN A2008100475240A CN 200810047524 A CN200810047524 A CN 200810047524A CN 101260525 A CN101260525 A CN 101260525A
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- oil gas
- gas transmission
- pipe
- transmission pipeline
- corrosion
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Abstract
The invention relates to a protector for an oil gas delivery pipe, comprising an isolator (2) and a shielding earth line (3), wherein, the isolator can be arranged on the top of a supporting pile (7) and also can be buried under the ground; a cathode joint of the isolator is connected with the oil gas delivery pipe (5) through a cable (4); and an anode joint of the isolator is connected with the shielding earth line through a cable (4). The protector for the oil gas delivery pipe provided by the invention is used for protection of an insulating layer of the oil gas delivery pipe and equipment which is connected with the pipe and AC interference and AC corrosion protection. The protector for the oil gas delivery pipe comprehensively protects the insulating layer of the oil gas delivery pipe from being damaged due to mutual inductance coupling, capacitive coupling and resistance coupling, protects the equipment which is connected with the pipe, limits the amplitude of induction electromotive force and overvoltage, has the protection functions of AC interference and AC corrosion, and is suitable for protection of the insulating layer of the pipe and the equipment which is connected with the pipe and AC interference and AC corrosion protection of the pipe.
Description
Technical field
The present invention relates to the protector of pipeline, particularly relate to the equipment that a kind of protection, protection of insulation layer of pipe-line link to each other with pipeline and exchanges and disturb and AC corrosion is protected.
Background technology
In oil (gas) the line of pipes system of Petroleum and Petrochemical Industry, because the needs of pipeline protection and galvanic protection can coat the certain thickness insulation layer of one deck on line of pipes, thickness can not surpass 20mm usually.Because the existence of insulation layer is arranged, electric current is answered (mutual inductance coupling), voltage by space static electricity induction (condenser coupling), earth current coupling (resistance coupling) pipeline (storage tank) is gone up by spatial impression and is produced induced electromotive force, superpotential.Induced electromotive force and superpotential can produce galvanic corrosion to pipeline, quicken pipeline and damage, and superpotential can be damaged the equipment (particularly cathodic protector) that links to each other with pipeline, can cause the piping insulation damage layer and jeopardize personnel safety.
At present my company " decoupling device used for steel pipe protection project " developed (number of patent application is: 200710169063.X); this decoupling device can limit various inductive emf, the superpotential amplitudes that produce on the pipeline that are coupling under the prerequisite that does not influence pipeline cathode protection, the interchange interference and the AC corrosion of pipeline had protective effect.But to transmission line of lightning strike or transmitting line flashover over the ground, earth current is coupled to pipeline through grounding device, destroys the protection of piping insulation layer, also lacks relative measures, therefore, comprehensively protect the destruction that the coupling of mutual inductance coupling, condenser coupling and resistance brings and to increase miscellaneous equipment.
Summary of the invention
Technical problem to be solved by this invention is: a kind of oil gas transmission pipeline protection device is provided, with the protection of the insulation layer that is applicable to pipe-line, and has to exchange and disturb and the AC corrosion protection function.
The present invention solves its technical problem and adopts following technical scheme:
Oil gas transmission pipeline protection device provided by the invention, it comprises decoupling device and shielding earth, and wherein: decoupling device is embedded in the ground, perhaps is installed in the top of supporting pile, and the lower end of supporting pile is embedded in the ground.The negative contacts of decoupling device links to each other with pipe-line by a cable, and the positive contact of decoupling device links to each other with shielding earth by a cable.
Oil gas transmission pipeline protection device provided by the invention, it is used to protect the equipment that the insulation layer, protection of pipe-line link to each other with pipeline and exchanges and disturbs and AC corrosion is protected.
The present invention has the destruction that comprehensive protection pipe-line causes the piping insulation layer because of mutual inductance coupling, condenser coupling and resistance coupling; the equipment that protection links to each other with pipeline; restriction inductive emf, superpotential amplitude have to exchange and disturb and the AC corrosion protection function.Specific as follows:
1. be applicable to the protection of the insulation layer of pipeline.When earth current is gone into ground through grounding device, and when pipe transmmision, the shielding wire of oil gas transmission pipeline protection device is collected current at first, the superpotential that earth current is produced is added on the shielding earth, the decoupling device of oil gas transmission pipeline protection device is limited in the potential difference between pipeline and the shielding earth in the insulation layer acceptable scope by its pressure limiting function; When mutual inductance coupling, condenser coupling produce higher induced electromotive force or superpotential on pipeline, decoupling device is by its pressure limiting and current drainage function, potential difference between pipeline and the shielding earth is limited in the insulation layer acceptable scope, and electric charge is transferred in the earth by shielding wire.
2. be applicable to the protection of the equipment that links to each other with pipeline.The equipment that links to each other with pipeline is generally impressed current cathodic protector and various transmitter, and its operating voltage is lower, is subject to surge and destroys.Oil gas transmission pipeline protection device is limited in the current potential between pipeline and the earth in the 200V by decoupling device and shielding earth, and the equipment that protection links to each other with pipeline is not destroyed by surge.
Pipeline because of mutual inductance and condenser coupling can exist tens of induction voltages to thousands of volts; oil gas transmission pipeline protection device is limited in the current potential between pipeline and the earth in the 5V by decoupling device and shielding earth, has interchange interference and AC corrosion protection function to pipeline.
Description of drawings
Fig. 1 is an oil gas transmission pipeline protection device application mode one.
Fig. 2 is the side-view of oil gas transmission pipeline protection device application mode one.
Fig. 3 is an oil gas transmission pipeline protection device application mode two.
Fig. 4 is an oil gas transmission pipeline protection device application mode three.
Fig. 5 is the structural representation of anticorrosion shielding earth.
Among the figure: 1. grounding device; 2. decoupling device; 3. shielding earth; 4. cable; 5. pipe-line; 6. cable connection point; 7. supporting pile; 8. conducting polymer composite preservative coat; 9. anti-corrosion of metal layer; 10. metal cuts with scissors line.
Embodiment
Oil gas transmission pipeline protection device provided by the invention, its structure be as depicted in figs. 1 and 2: comprise decoupling device 2 and shielding earth 3.Wherein: decoupling device 2 is installed in the top of supporting pile 7, and the negative contacts of decoupling device 2 links to each other with pipe-line 5 by a cable 4; The positive contact of decoupling device 2 links to each other with shielding earth 3 by a cable 4, and numbering 6 is cable connection points.Decoupling device 2 also can be embedded in the ground and use.
Described decoupling device 2 can be with install bin.(number of patent application is " decoupling device used for steel pipe protection project " that this decoupling device can adopt my company to develop: 200710169063.X), its structure is: comprise silicon controlled rectifier, coupling trigger device, surge protective device and port, the silicon controlled control utmost point is connected to the reactive element of coupling trigger device, with surge protective device and connect, port is drawn at the two ends of surge protective device to silicon controlled rectifier by the coupling trigger device.
Described shielding earth 3 can adopt a kind of in flexible corrosion protection earthing pole, wire metallic conductor, the anticorrosion shielding earth.Wherein: (number of patent application: 200720088986.8), its structure mainly is to comprise metallic cable to " the anticorrosion earthing pole of a kind of horizontal flexibility " that the flexible corrosion protection earthing pole can adopt our company to develop, and this metallic cable external packets is covered with conductive rubber.The wire metallic conductor adopts a kind of among copper stranded conductor, aluminum stranded conductor, steel strand, steel pipe, copper pipe, aluminum pipe, band steel, copper bar, the aluminium row.Anticorrosion shielding earth comprises metallic cable and conduction preservative coat.
The conduction preservative coat that anticorrosion shielding earth adopts can adopt a kind of in anti-corrosion of metal layer 9, the conducting polymer composite preservative coat 8, or the combined anti-corrosion layer of being made up of anti-corrosion of metal layer 9 and conducting polymer composite preservative coat 8.The conduction preservative coat of the anticorrosion shielding earth of every meter length should be able to bear 20～100kA (8/20 μ s) lightning surge electric current at least.
Anticorrosion shielding earth can adopt metallic cable 10 added metal preservative coats 9 (seeing Fig. 5-2), or metallic cable 10 outsides coat the conducting polymer composite preservative coat 8 (seeing Fig. 5-1) that macromolecular materials such as one deck conductive rubber, conductive plastics form, and also can be the combined anti-corrosion layers that is combined to form (shown in Fig. 5-3) that metallic cable 10 outsides coat above-mentioned several form preservative coats; The preservative coat of the anticorrosion shielding earth of every meter length should be able to bear 20～100kA (8/20 μ s) lightning surge electric current at least.
Above-mentioned anti-corrosion of metal layer 9 can be by in zinc, tin, aluminium, nickel, copper, steel, silver, gold, platinum, titanium, palladium, the iridium metals a kind of, or the alloy of multiple metal, or the rare earth alloy of multiple metal is made.
Above-mentioned conducting polymer composite preservative coat 8 can be by a kind of the making in conductive rubber, conductive plastics, electroconductive resin, conduction rubber and plastic, the electric conduction paint, and conducting polymer composite preservative coat 8 should be able to bear 20～100kA (8/20 μ s) lightning surge electric current at least.
When if transmission of electricity high voltage iron tower or substation ground network 1 (seeing Fig. 3 and Fig. 4) are arranged near pipe-line, generally speaking, inductive emf, superpotential that the various coupling meetings that transmitting line produces produce on pipeline.Transmit electricity particularly that high voltage iron tower is struck by lightning or transmission line over the ground during flashover, very high current potential can appear around these structures, and pipe-line 5 is because the existence of insulation layer, current potential is equivalent to the ground potential of infinite distant place, like this, the insulation layer of pipeline just can bear very high voltage, and when voltage surpassed the ability to bear of insulation layer, electrical breakdown can take place insulation layer.In order to prevent this puncture; adopt shielding earth 3 to come this superpotential is shielded and to collected current; by decoupling device 2 pipe-line 5 being carried out equi-potential with shielding earth 3 then is connected; decoupling device 2 provides current path; be used for the current potential between restriction conduit and the shielding wire, reach the purpose of protection insulation layer.
When having ultra-high-tension power transmission line to exist near the pipe-line 5, meeting produces on pipeline because of mutual inductance coupling, condenser coupling etc. on the pipeline inductive emf, superpotential, shielding earth 3 is embedded in the ground, current potential is lower, decoupling device 2 limits the inductive emf on the pipeline, superpotential, and with charge transfer to shielding earth, disperse to the earth by shielding earth 3.
Between iron tower and pipe-line 5, along being parallel to one section shielding earth 3 of pipelining, the mid point of shielding earth 3 is on the vertical line of iron tower and pipeline.
Oil gas transmission pipeline protection device provided by the invention, it is used to protect the equipment that the insulation layer, protection of pipe-line link to each other with pipeline and exchanges and disturbs and AC corrosion is protected.
Applicating example:
In oil gas transmission pipeline protection device of the present invention, decoupling device 2 difference as required can be divided into several mounting means:
A. between iron tower or substation ground network (grounding device), shielding earth 3 is set, if short circuit current to earth is little, short-circuit current on power system is decided, as long as a decoupling device 2 (as Fig. 1) is laid at the vertical line place, center of the shielding earth between shielding earth 3 and pipe-line 5, the length L of shielding earth is according to circumstances decided, and L is 75～200m usually.
B. between iron tower or substation ground network (grounding device), shielding earth 3 is set,, decides, then a decoupling device 2 (as Fig. 3) respectively is installed at two end distance midpoint L/4 places of shielding earth 3 on the short-circuit current of power system if short circuit current to earth is excessive; The length L of shielding earth is according to circumstances decided, and L is 75～200m usually.
C. if all there is grounding device 1 pipe-line 5 both sides, between iron tower or substation ground network (grounding device), shielding earth 3 is set, laying of shielding earth 3 is on the basis that b installs, lay the ground wire 3 that deshields at pipe-line 5 opposite sides, the shielding earth on both sides is connected with decoupling device 2 after converging and tying, and the installation of decoupling device 2 is identical with the front.
The cable 4 that the present invention adopts, it can utilize welding or crimping mode to be connected with pipe-line 5 and shielding earth 3.
Claims (9)
1. an oil gas transmission pipeline protection device is characterized in that comprising decoupling device (2) and shielding earth (3), and wherein: decoupling device (2) is embedded in the ground, perhaps is installed in the top of supporting pile (7), and the lower end of supporting pile (7) is embedded in the ground; The negative contacts of decoupling device (2) links to each other with pipe-line (5) by a cable (4), and the positive contact of decoupling device (2) links to each other with shielding earth (3) by a cable (4).
2. oil gas transmission pipeline protection device according to claim 1 is characterized in that described shielding earth (3) adopts a kind of in flexible corrosion protection earthing pole, wire metallic conductor, the anticorrosion shielding earth.
3. oil gas transmission pipeline protection device according to claim 2 is characterized in that the wire metallic conductor adopts a kind of among copper stranded conductor, aluminum stranded conductor, steel strand, steel pipe, copper pipe, aluminum pipe, band steel, copper bar, the aluminium row.
4. oil gas transmission pipeline protection device according to claim 2 is characterized in that anticorrosion shielding earth comprises metallic cable and conduction preservative coat, and the conduction preservative coat should be able to bear 20～100kA lightning surge electric current at least.
5. oil gas transmission pipeline protection device according to claim 4, the preservative coat that it is characterized in that conducting electricity adopt a kind of in anti-corrosion of metal layer, the conducting polymer composite preservative coat.
6. oil gas transmission pipeline protection device according to claim 4, the combined anti-corrosion layer that the preservative coat that it is characterized in that conducting electricity is made up of anti-corrosion of metal layer and conducting polymer composite preservative coat.
7. according to claim 5 or 6 described oil gas transmission pipeline protection devices; it is characterized in that the conducting polymer composite preservative coat by a kind of the making in conductive rubber, conductive plastics, electroconductive resin, conduction rubber and plastic, the electric conduction paint, the conducting polymer composite preservative coat should be able to bear 20～100kA lightning surge electric current at least.
8. according to claim 5 or 6 described oil gas transmission pipeline protection devices; it is characterized in that a kind of by in zinc, tin, aluminium, nickel, copper, steel, silver, gold, platinum, titanium, palladium, the iridium metals of anti-corrosion of metal layer; or the alloy of multiple metal, or the rare earth alloy of multiple metal is made.
9. according to the described oil gas transmission pipeline protection device of arbitrary claim in the claim 1 to 8, it is characterized in that being used to protect insulation layer, the equipment that protection links to each other with pipeline of pipe-line and exchanges and disturb and AC corrosion is protected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100475240A CN101260525A (en) | 2008-04-30 | 2008-04-30 | Oil gas transmission pipeline protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100475240A CN101260525A (en) | 2008-04-30 | 2008-04-30 | Oil gas transmission pipeline protection device |
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| Publication Number | Publication Date |
|---|---|
| CN101260525A true CN101260525A (en) | 2008-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100475240A Pending CN101260525A (en) | 2008-04-30 | 2008-04-30 | Oil gas transmission pipeline protection device |
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Cited By (4)
| 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 |
| CN110159841A (en) * | 2019-05-30 | 2019-08-23 | 国网河南省电力公司电力科学研究院 | A kind of buried oil-gas pipeline limiting surge voltage |
| CN114001208A (en) * | 2021-11-01 | 2022-02-01 | 北京安科科技集团有限公司 | Pipe system |
| CN114256823A (en) * | 2022-03-01 | 2022-03-29 | 国网江西省电力有限公司电力科学研究院 | Complete device and method for preventing power grid from entering ground and overcurrent for buried oil and gas pipe network |
-
2008
- 2008-04-30 CN CNA2008100475240A patent/CN101260525A/en active Pending
Cited By (7)
| 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 |
| CN110159841A (en) * | 2019-05-30 | 2019-08-23 | 国网河南省电力公司电力科学研究院 | A kind of buried oil-gas pipeline limiting surge voltage |
| CN114001208A (en) * | 2021-11-01 | 2022-02-01 | 北京安科科技集团有限公司 | Pipe system |
| WO2023072234A1 (en) * | 2021-11-01 | 2023-05-04 | 北京安科科技集团有限公司 | Intelligent pipe resistant to direct and alternative current interference, and intelligent pipe system |
| CN114001208B (en) * | 2021-11-01 | 2023-11-07 | 北京安科科技集团有限公司 | Alternating current and direct current interference resistant pipeline system |
| CN114256823A (en) * | 2022-03-01 | 2022-03-29 | 国网江西省电力有限公司电力科学研究院 | Complete device and method for preventing power grid from entering ground and overcurrent for buried oil and gas pipe network |
| CN114256823B (en) * | 2022-03-01 | 2022-07-12 | 国网江西省电力有限公司电力科学研究院 | Complete device and method for preventing power grid from entering ground and overcurrent for buried oil and gas pipe network |
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Open date: 20080910 |