CN201195750Y - Oil gas conveyer tube protection device - Google Patents
Oil gas conveyer tube protection device Download PDFInfo
- Publication number
- CN201195750Y CN201195750Y CNU2008200667551U CN200820066755U CN201195750Y CN 201195750 Y CN201195750 Y CN 201195750Y CN U2008200667551 U CNU2008200667551 U CN U2008200667551U CN 200820066755 U CN200820066755 U CN 200820066755U CN 201195750 Y CN201195750 Y CN 201195750Y
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- CN
- China
- Prior art keywords
- oil gas
- pipeline
- protection device
- shielding earth
- gas transmission
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Abstract
The utility model relates to a protection device of an oil gas conveying pipeline, which comprises a decoupler (2) and a shielding earth lead (3), wherein the decoupler is installed on the top of a supporting stake (7) and is embedded underground, a negative electrode contact of the decoupler is connected with the oil gas conveying pipeline (5) through an electric cable (4), and a positive electrode contact of the decoupler is connected with the shielding earth lead through the electric cable. The protection device of the oil gas conveying pipeline which is provided by the utility model is used to protect an insulating layer of the oil gas conveying pipeline, to protect devices which are connected with the pipeline, and to prevent alternating current interference and alternating current corrosion. The protection device of the utility model can fully prevent the oil gas conveying pipeline from damaging the pipeline insulating layer due to mutual inductance coupling, capacitance coupling and ohmic coupling, can protect the devices which are connected with the pipeline, can restrict the amplitude of induced electromotive force and excess voltage, has the functions of preventing the alternating current interference and the alternating current corrosion, and is applicable to protecting the insulating layer of the oil gas conveying pipeline, protecting the devices which are connected with the pipeline, and preventing the alternating current interference and the alternating current corrosion.
Description
Technical field
The utility model relates to the protector of pipeline, particularly relates to the equipment that a kind of protection, protection of insulation layer of pipe-line link to each other with pipeline and exchanges disturbing 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 in the utility model 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 utility model solves its technical problem and adopts following technical scheme:
The oil gas transmission pipeline protection device that the utility model provides, 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.
The oil gas transmission pipeline protection device that the utility model provides, 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 utlity model 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
The oil gas transmission pipeline protection device that the utility model provides, 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 and conducting polymer composite preservative coat.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.
Applicating example:
In the utility model oil gas transmission pipeline protection device, 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 utility model adopts, it can utilize welding or crimping mode to be connected with pipe-line 5 and shielding earth 3.
Claims (5)
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 links to each other with pipe-line (5) by a cable (4), and the positive contact of decoupling device 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 adopts metallic cable (10) added metal preservative coat (9).
5. oil gas transmission pipeline protection device according to claim 2 is characterized in that anticorrosion shielding earth adopts metallic cable (10) outside to coat the conducting polymer composite preservative coat (8) of one deck conductive rubber or conductive plastics or conduction rubber and plastic or electroconductive resin or electric conduction paint formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200667551U CN201195750Y (en) | 2008-04-30 | 2008-04-30 | Oil gas conveyer tube protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200667551U CN201195750Y (en) | 2008-04-30 | 2008-04-30 | Oil gas conveyer tube protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201195750Y true CN201195750Y (en) | 2009-02-18 |
Family
ID=40415387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200667551U Expired - Lifetime CN201195750Y (en) | 2008-04-30 | 2008-04-30 | Oil gas conveyer tube protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201195750Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315521A (en) * | 2010-07-06 | 2012-01-11 | 中国石油天然气集团公司 | Pipeline station instrument equipment grounding device |
-
2008
- 2008-04-30 CN CNU2008200667551U patent/CN201195750Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315521A (en) * | 2010-07-06 | 2012-01-11 | 中国石油天然气集团公司 | Pipeline station instrument equipment grounding device |
| CN102315521B (en) * | 2010-07-06 | 2013-09-04 | 中国石油天然气集团公司 | Pipeline station instrument equipment grounding device |
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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: 20090218 |
|
| CX01 | Expiry of patent term |