CN110159841A - A kind of buried oil-gas pipeline limiting surge voltage - Google Patents
A kind of buried oil-gas pipeline limiting surge voltage Download PDFInfo
- Publication number
- CN110159841A CN110159841A CN201910463213.0A CN201910463213A CN110159841A CN 110159841 A CN110159841 A CN 110159841A CN 201910463213 A CN201910463213 A CN 201910463213A CN 110159841 A CN110159841 A CN 110159841A
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- Prior art keywords
- voltage
- gas pipeline
- pipeline
- buried oil
- surge voltage
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- 230000000670 limiting effect Effects 0.000 title claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 31
- 238000000576 coating method Methods 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims abstract description 28
- 230000003628 erosive effect Effects 0.000 claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 24
- 229910044991 metal oxide Inorganic materials 0.000 claims description 10
- 150000004706 metal oxides Chemical class 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 8
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 6
- 239000004800 polyvinyl chloride Substances 0.000 claims description 6
- 239000005030 aluminium foil Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000005253 cladding Methods 0.000 claims description 3
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 abstract description 6
- 208000025274 Lightning injury Diseases 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 27
- 238000005260 corrosion Methods 0.000 description 9
- 239000002689 soil Substances 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 6
- 230000006378 damage Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003755 preservative agent Substances 0.000 description 2
- 230000002335 preservative effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 206010000372 Accident at work Diseases 0.000 description 1
- 208000019901 Anxiety disease Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
This application involves a kind of buried oil-gas pipelines for limiting surge voltage, including metal layer (1) and the erosion resistant coating (2) being coated on outside the metal layer, it further include the capacitor layers (3) being coated on outside the erosion resistant coating and the metallic shield net (4) being coated on outside the capacitor layers, metallic shield net is circumscribed with voltage limiter (5), when voltage limiter, which is connected, is more than certain voltage, the voltage limiter switchs to low resistance state by high resistance state.The present invention improves the buried oil-gas pipeline structure of tradition, design the buried oil-gas pipeline of limitation surge voltage, this kind of pipeline can be targetedly applied to the more frequent region of power grid thunderbolt, when pipeline is subjected to impact voltage, surge voltage on pipeline anticorrosion coating is limited in safe range, prevent foreign impacts voltage from damaging to pipeline anticorrosion coating, the case where oil-gas pipeline wrecks caused by largely avoiding because of electric network fault or lightning stroke, practical and replicability are extremely strong.
Description
Technical field
The application belongs to industrial equipment anti-thunder technical field, more particularly, to a kind of buried Oil/Gas Pipe for limiting surge voltage
Road.
Background technique
Oil-gas pipeline and power grid are all the lifeblood of energy security, to give full play to limited land resources advantage, power circuit
Even there is length in part soil anxiety region in the scissors crossing situation that inevitably will appear path with oil and gas pipeline
Distance shares the case where public corridor.A large amount of power channels and oil-gas pipeline are parallel, between the two electromagnetic compatibility problem (including magnetic
Field coupling and field coupling) it is increasingly severe, once therefore pipe-line system is destroyed, will cause to the serious broken of ecological environment
It is bad, it is also possible to bring major industrial accident, therefore big regional power grid has become one to the security implication of buried metal layer
Very sharp problem.
Current buried oil-gas pipeline corrosion-resistant important means is setting erosion resistant coating.On the one hand erosion resistant coating has completely cut off oil-gas pipeline
With directly contacting for soil media, the rate of the spontaneous corrosion of pipeline is greatly reduced, on the other hand due to its resistivity and Jie
Electric constant is all very high, can reduce the stray electrical current of flow ipe, it is suppressed that the electrolytic corrosion of pipeline.If the erosion resistant coating of pipeline damages
Bad, oil-gas pipeline will be contacted directly with soil at this, and the pipeline of one side erosion resistant coating breakage can become the weakness of piping corrosion
The major accident of Pipeline damage may occur under serious conditions for point；On the other hand, since the resistivity of erosion resistant coating is much higher than soil
Earth resistivity, erosion resistant coating breakage pipeline are lower than other positions to ground resistance, incude in pipeline when power grid operates normally and produce
Raw stray electrical current some can from erosion resistant coating breakage flow out pipeline, pipeline leakage current distribution, Potential distribution and
Intact situation has a larger difference with erosion resistant coating for ground potential distribution near erosion resistant coating breakage etc., near erosion resistant coating breakage
There may be certain security risks for the contact potential of pipeline.
The pipeline anticorrosion coating excessively close apart from tower grounding device has breakdown wind in electric network fault or when by being struck by lightning
Danger.In terms of the breakdown characteristics of pipeline anticorrosion coating include following two: when there is lightning current to flow through soil, it is possible to puncture soil and arrive
Up to pipe surface, then what is born on piping jacket at this time is the surge voltage under similar needle to board electrode；If lightning current does not have
There is breakdown soil to reach pipe surface, then what is born on piping jacket at this time is the surge voltage of approaches uniformity off field.
Summary of the invention
The technical problem to be solved by the present invention is to solve in the prior art because electric network fault or lightning stroke lead to oil-gas pipeline
The deficiency being easily destroyed, to provide a kind of buried oil-gas pipeline for limiting surge voltage.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of buried oil-gas pipeline limiting surge voltage, including metal layer and the anti-corrosion being coated on outside the metal layer
Layer, further includes the capacitor layers being coated on outside the erosion resistant coating and the metallic shield net being coated on outside the capacitor layers, metal screen
It covers net and is circumscribed with voltage limiter, when voltage limiter, which is connected, is more than certain voltage, the voltage limiter switchs to low resistance by high resistance state
State.
The capacitor layers are made of the equal pressing plate of multilayer in one of the embodiments,.
The capacitor layers are made of 2 or 3 layers of equal pressing plate of aluminium foil in one of the embodiments,.
The metallic shield net is aluminum grid in one of the embodiments,.
The voltage limiter is embedded in earth's surface or underground, the voltage limiter upper and lower ends difference in one of the embodiments,
It is connected with plain conductor, the plain conductor of the voltage limiter upper end is connect with the metallic shield net, the voltage limiter lower end
Plain conductor extends to deep under ground.
The voltage limiter includes several metal oxide valve blocks in one of the embodiments, and the cladding gold
Belong to the insulation crust of oxide valve block.
The certain voltage voltage value is according to the nominal discharge of the metal oxide valve block in one of the embodiments,
Electric current and quantity determine.
The insulation crust is polyvinyl chloride material in one of the embodiments,.
The metallic shield net is successively circumscribed with several along the oil-gas pipeline extending direction in one of the embodiments,
Voltage limiter, the spacing between the adjacent voltage limiter are less than or equal to 100m.
The spacing between the adjacent voltage limiter is 50m or 100m in one of the embodiments,.
The beneficial effects of the present invention are: improving to the buried oil-gas pipeline structure of tradition, limitation surge voltage is designed
Buried oil-gas pipeline, this kind of pipeline can be targetedly applied to the more frequent region of power grid thunderbolt, pipeline meet with
Be hit voltage when, the surge voltage on pipeline anticorrosion coating is limited in safe range, prevents foreign impacts voltage to pipe
The case where road erosion resistant coating damages, and oil-gas pipeline wrecks caused by largely avoiding because of electric network fault or lightning stroke hair
Raw, practical and replicability are extremely strong.
Detailed description of the invention
The technical solution of the application is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the buried oil-gas pipeline structural schematic diagram of the limitation surge voltage of the embodiment of the present application；
Fig. 2 is the buried oil-gas pipeline cross-sectional view of the limitation surge voltage of the embodiment of the present application.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
In the description of the present application, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the application and simplifies description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
The limitation of the application protection scope.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more of the features.In the description of the invention, unless separately
It is described, the meaning of " plurality " is two or more.
In the description of the present application, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in this application.
It is described in detail the technical solution of the application below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of buried oil-gas pipeline limiting surge voltage, including metal layer 1 and the erosion resistant coating being coated on outside metal layer 1
2.Metal layer 1 is in pipe-like, and oil gas 9 is in 1 internal circulation of metal layer.Oil-gas pipeline is generally all taken as far as possible in order to reduce resistance
Its method of straight-run has three ways, such as ground, pipe trench and underground.Pipeline within oil depot enclosure wall should all be laid on the ground,
The original pipeline that has been embedded in the pipeline of underground or has been laid in pipe trench, in conjunction with the technological transformation of oil depot, also should as far as possible by
It is changed to step over ground installation, the oil pipeline other than enclosure wall generally all passes through pipeline in order not to block traffic and occupy farmland
Underground is directly embedded in after preservative treatment, depth is 0.5~0.8m.It is relatively conventional pipeline that erosion resistant coating 2 is arranged outside metal layer 1
Preservative treatment method.Due to containing element sulphur and acidic materials in the oil product of conveying, additional pipeline is exposed outside, causes pipeline easy
It is corroded, metal surface addition corrosion-inhibiting coating such as paints, and completely cuts off the contact of the oxygen in pipeline and air with this, reaches guarantor with this
Protect effect.Region is easily sent out in thunder and lightning, erosion resistant coating, which had not only played, prevents metal layer to be embedded in for a long time by acid-base material erosion damage in ground, but also
Certain insulating effect is played, the destruction of the voltage Intruding wave of certain voltage grade can be prevented.
Buried oil-gas pipeline in the present embodiment further includes the capacitor layers 3 being coated on outside erosion resistant coating 2, and is coated on capacitor
Metallic shield net 4 outside layer 3.Capacitor layers 2 are made of capacitor, because the electric property of capacitor is played to erosion resistant coating 2 surface induction electricity
The pressure of pressure acts on and slows down effect to external voltage Intruding wave wave head.Metallic shield net 4 is coated in capacitor layers 3, and with
3 outer surface of capacitor layers electrical connection, specifically, metallic shield net 4 and 3 outer surface of capacitor layers of entire buried oil-gas pipeline etc. are electric
Position connection acts on so that capacitor layers 3 be made to play pressure.In addition, metallic shield net 4 can also play certain shielding foreign impacts
The effect of electric current.Metallic shield net 4 is circumscribed with voltage limiter 5, and when voltage limiter 5, which is connected, is more than certain voltage, voltage limiter 5 is by high electricity
Resistance state switchs to low resistance state.Specifically, voltage limiter 5 has nonlinear wind vibration, usually on buried metal pipeline
When interference voltage is in reasonable range, external voltage limiter 5 will not be acted high resistance state is presented；When there is foreign impacts wave to hit
After wearing soil arrival pipe surface, more than after certain voltage class, low resistance state will be presented in external voltage limiter 5, the punching
It hits voltage and most of energy is released by external voltage limiter, to be carried out to the voltage on buried metal pipeline erosion resistant coating
Limitation.In buried metal pipeline construction, external voltage limiter 5 can be embedded in underground, can also be embedded in earth's surface, can play limitation
The effect of surge voltage.
It is acted on to make capacitor layers 3 preferably play pressure, capacitor layers 3 are pressed by multilayer in one of the embodiments,
Board group is at equal pressing plate can be made of the metal sheet of copper or aluminium.According to the different needs of 3 capacitor specification of capacitor layers, wherein
In one embodiment, capacitor layers 3 are made of 2 or 3 layers of equal pressing plate of aluminium foil, and the equal pressing plate of aluminium foil or aluminium foil pole plate are parallel layer by layer uniformly
Setting forms layer capacitance.Metallic shield net 4 is arranged in 3 outermost layer of capacitor layers, in one of the embodiments, metallic shield
Net 4 is the aluminum grid for being coated on 3 outside of capacitor layers.
Voltage limiter 5 is embedded in earth's surface or underground in one of the embodiments, and 5 upper/lower terminal of voltage limiter is connected separately with
The plain conductor 6 of plain conductor 6,5 upper end of voltage limiter is connect with metallic shield net 4, and the plain conductor 6 of 5 lower end of voltage limiter is to ground
Lower depths extends, and extends depth and is not less than 1.5 meters of underground.
Voltage limiter 5 includes several metal oxide valve blocks 7 of superposition, and cladding gold in one of the embodiments,
Belong to the insulation crust 8 of oxide valve block.The nominal discharge current and superposition quantity of metal oxide valve block 7 are according to local thunderbolt
Intensity and the level of protection of needs are worked out and are manufactured.Insulation crust 8 is polyvinyl chloride material in one of the embodiments,
Matter.When insulation crust 8 is made of PVC, PVC anti-corrosion insulation shell 8 is hermetically sealed to wrap superimposed metal oxide valve block 7.
PVC anti-corrosion insulation shell 8 in addition to avoid voltage limiter 5 led to by external environment influence internal wetted, by corrosion cracking other than, it is most heavy
The effect wanted is exactly to avoid voltage limiter 5 from causing head and the tail to be shorted by external environment to lose pressure limiting effect.
The metal oxide valve block 7 of market has certain nominal discharge current, can be bought by centralized purchasing, and wherein one
In a embodiment, the voltage value of above-mentioned certain voltage is true according to the nominal discharge current and superposition quantity of metal oxide valve block 7
It is fixed.
Metallic shield net 4 is divided into the multistage every 50mm or 100m in one of the embodiments, in every section of metal
Gauze screen 4 is connected with a voltage limiter 5.
In order to guarantee pressure limiting effect, influence of the thunderbolt to oil-gas pipeline, in one of the embodiments, metallic shield are reduced
Net 4 is successively circumscribed with several voltage limiters 5 along oil-gas pipeline extending direction one by one, and the spacing between adjacent voltage limiter 5 is less than or equal to
100m.The spacing between adjacent voltage limiter 5 is 50m or 100m in one of the embodiments,.The arrangement of external voltage limiter 5 is close
Degree can be determined according to localized ground lightning strike density geographical where the buried metal pipeline, when the ground ground lightning strike density is larger,
The density of voltage limiter 5 can also suitably be increased, can be increased by every 100 meters 1 is every 50 meters 1 etc..It is similar, buried metal
The erosion resistant coating 2 of pipeline, capacitor layers 3 can also geographical localized ground lightning strike density determines where buried metal pipeline, such as works as thunderbolt
When density is larger, 2 thickness of erosion resistant coating increases, and using the capacitor layers 3 constituted compared with the equal pressing plate of multilayer.
In conclusion designing limitation the beneficial effects of the present invention are: improve to the buried oil-gas pipeline structure of tradition
This kind of pipeline can be targetedly applied to the more frequent region of power grid thunderbolt by the buried oil-gas pipeline of surge voltage,
When pipeline is subjected to impact voltage, the surge voltage on pipeline anticorrosion coating is limited in safe range, prevents foreign impacts
Voltage damages pipeline anticorrosion coating, and oil-gas pipeline caused by largely avoiding because of electric network fault or lightning stroke wrecks
It happens, practical and replicability are extremely strong.
It is enlightenment with the above-mentioned desirable embodiment according to the application, through the above description, relevant staff is complete
Full various changes and amendments can be carried out in the range of without departing from this item application technical idea.The technology of this item application
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of buried oil-gas pipeline for limiting surge voltage including metal layer (1) and is coated on anti-outside the metal layer
Rotten layer (2), which is characterized in that further include the capacitor layers (3) being coated on outside the erosion resistant coating and be coated on outside the capacitor layers
Metallic shield net (4), metallic shield net is circumscribed with voltage limiter (5), when voltage limiter, which is connected, is more than certain voltage, the pressure limiting
Device switchs to low resistance state by high resistance state.
2. the buried oil-gas pipeline of limitation surge voltage according to claim 1, which is characterized in that the capacitor layers (3)
It is made of the equal pressing plate of multilayer.
3. the buried oil-gas pipeline of limitation surge voltage according to claim 1 or 2, which is characterized in that the capacitor layers
(3) it is made of 2 or 3 layers of equal pressing plate of aluminium foil.
4. the buried oil-gas pipeline of limitation surge voltage according to claim 1, which is characterized in that the metallic shield net
It (4) is aluminum grid.
5. the buried oil-gas pipeline of limitation surge voltage according to claim 1, which is characterized in that the voltage limiter (5)
It is embedded in earth's surface or underground, the voltage limiter upper and lower ends are connected separately with plain conductor (6), the metal of the voltage limiter upper end
Conducting wire is connect with the metallic shield net (4), and the plain conductor of the voltage limiter lower end extends to deep under ground.
6. the buried oil-gas pipeline of limitation surge voltage according to claim 1, which is characterized in that the voltage limiter (5)
Including several metal oxide valve blocks (7), and the insulation crust (8) of the cladding metal oxide valve block.
7. the buried oil-gas pipeline of limitation surge voltage according to claim 6, which is characterized in that the certain voltage
Voltage value is determined according to the nominal discharge current and quantity of the metal oxide valve block (7).
8. the buried oil-gas pipeline of limitation surge voltage according to claim 6, which is characterized in that the insulation crust
It (8) is polyvinyl chloride material.
9. the buried oil-gas pipeline of limitation surge voltage according to claim 1, which is characterized in that the metallic shield net
(4) it is successively circumscribed with several voltage limiters (5) along the oil-gas pipeline extending direction, the spacing between the adjacent voltage limiter is less than
Equal to 100m.
10. the buried oil-gas pipeline of limitation surge voltage according to claim 9, which is characterized in that the adjacent pressure limiting
Spacing between device (5) is 50m or 100m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910463213.0A CN110159841A (en) | 2019-05-30 | 2019-05-30 | A kind of buried oil-gas pipeline limiting surge voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910463213.0A CN110159841A (en) | 2019-05-30 | 2019-05-30 | A kind of buried oil-gas pipeline limiting surge voltage |
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|---|---|
| CN110159841A true CN110159841A (en) | 2019-08-23 |
Family
ID=67630468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910463213.0A Pending CN110159841A (en) | 2019-05-30 | 2019-05-30 | A kind of buried oil-gas pipeline limiting surge voltage |
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