CN2893383Y - Thunderproof device for Gas pipeline - Google Patents
Thunderproof device for Gas pipeline Download PDFInfo
- Publication number
- CN2893383Y CN2893383Y CN 200620018927 CN200620018927U CN2893383Y CN 2893383 Y CN2893383 Y CN 2893383Y CN 200620018927 CN200620018927 CN 200620018927 CN 200620018927 U CN200620018927 U CN 200620018927U CN 2893383 Y CN2893383 Y CN 2893383Y
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- Prior art keywords
- pipeline
- station
- protection device
- main pipeline
- lightning
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Abstract
The utility model relates to a lightning protection device for the gas pipeline that is provided with a pipeline Yin protecting station every other 50 to 200 KM. Insulated pipeline joints are arranged at the two ends of the technical pipe network of the pipeline Yin protecting station in the lightning protection device. The lightning protection device is arranged at the main pipeline before the access and after the exit of the Yin protecting station and is connected with the pipeline after parallel connected with the constant potential rectifier; after the lightning protection device on the main pipeline of the station yard is parallel connected with the electric potential transmitter, the lightning protection device is connected with the pipeline. The utility model is characterized in that: the surging absorptive-type through flow lightning arrester is connected with the composite tapping passage with a PN positive pressure drop in series and between the main pipeline and the ground. Various kinds of electrical currents that exceed the voltage threshold on the main pipeline can be tapped to the ground through the lightning protection device so as to realize the functions of tapping the thunder by the gas pipeline and protecting the gas pipeline and the subsidiary facilities.
Description
Technical field
The utility model relates to a kind of lightning protection special-purpose equipment of petroleum gas gas pipeline; it is a kind of employing two-stage thunder and lightning bleed-off system; realize the device of gas pipeline lightning protection; promptly adopt through-flow lightning arrester of surge absorption-type and the compound leakage path of PN junction forward voltage drop, realize the General of gas pipeline cathodic protection and lightning protection.
Background technique
At present, petroleum industry in the control of thunder and lightning, the technical certain achievement that obtained of the lightning protection of metal oil storage tank particularly.The pipeline industry is also developed thunderstorm electricity protective devices such as sacrificial anode with lightning protection effect and lightning protection battery.These devices generally, all are the methods of taking ground connection or electrical communication on the principle, and suitable electric-charge-dissipating means are provided, to eliminate or to reduce the harm of thunder and lightning.
Certain gas pipeline is gone into operation in the fall, just exposes the serious harm of thunder and lightning to gas pipeline up to the thunderstorm season in 1 year comprehensively.Therefore, the pipeline lightning protection measures still has certain degree of difficulty in construction.Main cause is, three layers of PE pipeline realize that the required protective current density of cathodic protection is extremely low, and the lightning protection battery is installed the quantity major general and do not had due effect; If the lightning protection battery is installed in a large number, cause probably again the clamping down on of maximum protective potential, make protection potential to regulate.Simultaneously, directly the defective that exists of ground connection is: because directly grounded existence, the ground electric charge can be assembled to pipeline rapidly, make pipeline become the center of charge concentration, and pipeline is vulnerable to the thunder injury.
The model utility content
The purpose of this utility model provides a kind of lighting protection device of gas pipeline, adopts the through-flow lightning arrester of surge absorption-type and the compound leakage path of PN junction forward voltage drop of thunder and lightning bleed-off system, realizes the integrated lightning protection of gas pipeline.Overcome existing shocking preventing technology, it is poor that the lightning protection battery is installed the few lightning protection effect of quantity; It is many that the lightning protection battery is installed, and causes maximum protective potential clamped down on the shortcoming that protection potential can't be regulated.Overcome direct ground connection, the ground electric charge can be assembled to pipeline rapidly, and pipeline is subjected to the deficiency of thunder injury easily.
According to the characteristics of gas pipeline, comparatively desirable lightning protection equipment should have following three kinds of functions at least:
(1) intercepts the geoinduction electric charge;
(2) has suitable electric-charge-dissipating path;
(3) have lasting little electric current dissipation passage, promptly have the function of buffering discharge.
The technical solution adopted in the utility model is:
Adopt two-stage thunder and lightning bleed-off system: establish a pipeline CP station every the 50-200 kilometer at gas pipeline.The pipe-line wrapping joint is arranged respectively between processing pipe network two ends and the main pipeline in the station of pipeline CP station.On enter the station main pipeline and departures main pipeline, be separately installed with thunderstorm electricity protective device.On the main pipeline of station, thunderstorm electricity protective device is installed.It is characterized in that: thunderstorm electricity protective device is by through-flow lightning arrester of surge absorption-type and the compound leakage path series connection of PN junction forward voltage drop, and is connected across between main pipeline and the earth.
Establish a pipeline CP station at gas pipeline every the 50-200 kilometer.The pipe-line wrapping joint is arranged respectively between processing pipe network two ends and the main pipeline in the station of pipeline CP station, make in the pipeline CP station processing pipe network and insulate between the main pipeline into and out of standing.On enter the station main pipeline and departures main pipeline, be separately installed with thunderstorm electricity protective device.Be that thunderstorm electricity protective device is installed on entering the station before of CP station and the departures main pipeline afterwards.On the main pipeline of station, thunderstorm electricity protective device is installed.Thunderstorm electricity protective device is made up of through-flow lightning arrester of surge absorption-type and the compound leakage path of PN junction forward voltage drop.Thunderstorm electricity protective device is connected across between main pipeline and the ground.The various electric currents that surpass its Voltage threshold on the main pipeline just can be by its earth of releasing; thereby make main pipeline and with it facility, the equipment of electric connection avoid the impact of high voltage, big electric current, can make electric current, voltage, the current potential of the normal cathodic protection work on the pipeline obtain keeping simultaneously again.
The through-flow lightning arrester structure of described surge absorption-type is: have 3 piezoresistances to be connected in parallel, an end connecting tube; Be in parallel with 3 piezoresistances after the thunder and lightning counter is connected with another piezoresistance, piezoresistance one end is connected on the main pipeline; The electrical spark dissolving tank is in parallel with the thunder and lightning counter.When the induced voltage on the pipeline reached some threshold values, lasting passage was open-minded automatically, the electric charge of initiatively releasing, and charge inducing is low-level on the maintenance pipeline.The primary component of this device is metallic oxide piezoresistance, electrolyte current limiting system and the clearance for insulation based on zine oxide.Several piezoresistances constitute the gradient discharge channel together, and they have well non-linear, i.e. and under certain voltage (generally being 3v-5v), leakage current can be less than 1mA; In a single day and exceeded this voltage range, and it is very little that its resistance will drop to, and electric current is flow through rapidly, and voltage is reduced to operating voltage rapidly.The electrolyte current limiting system can make induction current release with certain speed, has avoided the issuable harm of transient large current discharge.Simultaneously, this device has high insulating property, and charge inducing can't be introduced into pipeline by it, and the electric charge that is introduced into by other approach on the pipeline just can be introduced underground by this passage when reaching certain threshold value.
The compound leakage path structure of described PN junction forward voltage drop is: the compound leakage path structure of described PN junction forward voltage drop is: two diode reverse parallel connections are serially connected between through-flow lightning arrester of surge absorption-type and the earth.
The structure of described electrical spark dissolving tank is: saturated nacl aqueous solution is housed in container, two groups of graphite electrodes are arranged in saturated nacl aqueous solution, the distance of two groups of graphite electrodes is connected with lead on the graphite electrode between the 10-50 millimeter.
The beneficial effects of the utility model: the electrolyte current limiting system can make induction current release with certain speed, has avoided the issuable harm of transient large current discharge.Simultaneously, this device has high insulating property, and charge inducing can't be introduced into pipeline by it, and the electric charge that is introduced into by other approach on the pipeline just can be introduced underground by this passage when reaching certain threshold value.
The shocking preventing technology structural design of above-mentioned gas pipeline of the present utility model has bigger improvement, realizes the General of gas pipeline lightning protection and cathodic protection.This device has high insulating property, and charge inducing can not be introduced into pipeline by it, and the electric charge that is introduced into by other approach on the pipeline just can be introduced underground by this passage when reaching certain threshold value.It is poor to have overcome the few lightning protection effect of existing shocking preventing technology lightning protection battery installation quantity; Battery is many, to clamping down on of maximum protective potential, and the shortcoming that protection potential can't be regulated.Overcome direct ground connection, pipeline is more vulnerable to the deficiency of thunder injury.The utility model meets long lightning protection needs apart from gas pipeline fully, and has produced and protect gas pipeline not to be subjected to the effect of damage to crops caused by thunder practicality.It is a new and innovative, progressive, practical new design.
The utility model is described in further detail below in conjunction with drawings and the specific embodiments.
Description of drawings
Accompanying drawing 1 is the utility model line construction schematic representation.It is the example structure schematic representation.
Accompanying drawing 2 is the utility model line construction schematic representation.It is another kind of ground structure schematic representation.
Among the figure, 1. processing pipe network in the station, 2. insulating joint, 3. main pipeline, 4. piezoresistance, 5. piezoresistance, 6. piezoresistance, 7. piezoresistance, 8. thunder and lightning counter, 9. electrical spark dissolving tank, 10. diode.
Embodiment
Embodiment: consult accompanying drawing 1.
The utility model was once established a pipeline CP station at certain gas pipeline every the 50-200 kilometer, established 10 band RTU station CP station altogether.There is pipe-line wrapping joint (2) to carry out electrical insulation respectively between (1) two ends of processing pipe network in the station of pipeline CP station and the main pipeline (3).10 CP station are selected this value each two cover of thunderstorm electricity protective device for 2kA for use.Each CP station is installed two cover thunderstorm electricity protective devices, is connected on the main pipeline that enters the station and set off (3) of CP station.Thunderstorm electricity protective device is by through-flow lightning arrester of surge absorption-type and the compound leakage path series connection of PN junction forward voltage drop.Because every CP station all has the negative electrode output cable of enough capacity into and out of the station, the safety grounding of earth resistance less than 5 Ω arranged again in standing.Because every CP station all has the negative electrode output cable of enough capacity into and out of the station, have grounded screen electric resistance can utilize in standing again, so the thunderstorm electricity protective device of CP station is installed between the negative electrode output cable and the interior ground connection of CP station of CP station both sides less than the safety grounding of 5 Ω.Surge absorption-type is through-flow, and the lightning arrester structure is: have 3 piezoresistances (4,5,6) to be connected in parallel, an end connects main pipeline (3).3 piezoresistances (4,5,6) model is respectively MYL1-47/5, MYL1-56/5, MYL1-10-620.Be in parallel with 3 piezoresistances (4,5,6) after thunder and lightning counter (8) is connected with another piezoresistance (7), piezoresistance (7) one ends are connected on the main pipeline (3).Thunder and lightning counter (8) model is FK-1; Piezoresistance (7) model of connecting with thunder and lightning counter (8) is MYL1-56/5.Electrical spark dissolving tank (9) is in parallel with thunder and lightning counter (8).
After first order surge type passage lightning arrester had been installed, main pipeline (3) and relevant facilities and equipment all be subjected to protection.But main pipeline (3) still is subjected to the influence of 60 volts of following residual voltages of releasing frequently; particularly the situation that influences main pipeline (3) at the thunderstorm season residual voltage more frequently takes place; when main pipeline (3) is sensed negative thunder; pipe to soil potential can moment surpass potentiostat-1.5v is provided with; meet or exceed the full scale-3v of pipe to soil potential table; at this moment, can not make pipe to soil potential normal even potentiostat is reduced to 0 with protective current, instrument is the error state of alarm.When the positive thunder of main pipeline (3) induction; main pipeline (3) current potential obviously is offset to positive potential; but pipe to soil potential moment is 0 even for just; potentiostat is to keep the pipe to soil potential of setting-1.5v and strengthen protective current output significantly; when exceeding the overcurrent setting value of instrument; instrument is the overcurrent state of alarm, and output is all turn-offed.Sometimes, can reach more than the 10A from the immediate current of pipeline, fusing can take place and cause CP station normally not move in the instrument fus.For this reason, we have adopted secondary thunder and lightning (stray electrical current) leakage path of non-piezoresistive again, are referred to as the compound leakage path of PN junction forward voltage drop.
The compound leakage path structure of PN junction forward voltage drop is: two diodes (10) reverse parallel connection is serially connected between through-flow lightning arrester of surge absorption-type and the earth.Two diodes (10) model: 2CZ10A.
The structure of electrical spark dissolving tank (9) is: saturated nacl aqueous solution is housed in container, two groups of graphite electrodes are arranged in saturated nacl aqueous solution, the distance of two groups of graphite electrodes is connected with lead on the graphite electrode between the 10-50 millimeter.
Performance Detection:
The thunderstorm electricity protective device system plays crucial protective action to the safety of main pipeline (3) and related facility, equipment, should forward and backwardly detect its performance in rainy season, guarantees that performance is intact.Because this lightning protection system be exclusive employing, the detection device that does not have moulding, we have developed the device for detecting performance of this system according to its technical characterstic, this device can be simulated the induction lightening of 600v, inspection method applies 600v voltage for moment between " pipeline " and " ground connection " of lightning arrester, measure the residual voltage of detection device then, the pipeline lightning arrester above high voltage of 60v of can releasing then is described when residual voltage is 60v, reach the requirement of performance index.
Pipeline lightning protection system effect is analyzed:
This pipeline has been finished the installation of pipeline thunderstorm electricity protective device completely, sets up pipeline lightning protection system.By this system runnability over one year, particularly pass through the test of thunderstorm season, the situation of high voltage, heavy current impact destruction did not take place to be subjected to facility, the equipment of pipeline electric connection in each field, station along the line.
By the moon being protected the field observation of equipment operation, also verified the lightning protection effect of pipeline thunderstorm electricity protective device: one time gas transmission place technician carries out the maintenance repair of cloudy guarantor's equipment, and at 12 o'clock at noon, thunderstorm weather appears in the CP station their location.Field observation finds that when thunderbolt took place, the indication of cloudy guarantor's operating console pipe to soil potential reduced to zero suddenly, and the output current indication skyrockets to 4A (output current is about 0.5A during normal state), recovers immediately, and repetition lasts and reaches more than one hour for several times.Above-mentioned situation has proved absolutely two problems: the one, and thunder and lightning exists really to the harm of pipeline, and can produce " surge " in longer a period of time on pipeline.The 2nd, the thunderstorm electricity protective device of pipeline plays the thunder and lightning of releasing really, the effect of protection pipeline and affiliated facility thereof.In addition, the SCADA system by pipeline also repeatedly finds above-mentioned phenomenon to the monitoring of cloudy insurance system runnability, 2 conclusions above having confirmed more.
In order further to study harm and the Prevention Technique of thunder and lightning, the thunder and lightning counter has been installed for each thunderstorm electricity protective device is tentative to pipeline.In less than 3 months time, the initial station just records protective equipment and successively discharges 22 times, and the negative electrode station that has records 20 discharges.This has proved that further thunder and lightning exists very important harm for gas pipeline.Also verified simultaneously the validity of this pipeline thunderstorm electricity protective device.
Claims (5)
1, a kind of lighting protection device of gas pipeline, establish a pipeline CP station at gas pipeline every the 50-200 kilometer, between (1) two ends of processing pipe network in the station of pipeline CP station and the main pipeline (3) pipe-line wrapping joint (2) is arranged respectively, on enter the station main pipeline and departures main pipeline, be separately installed with thunderstorm electricity protective device, on the main pipeline of station, thunderstorm electricity protective device is installed, it is characterized in that: thunderstorm electricity protective device is by through-flow lightning arrester of surge absorption-type and the compound leakage path series connection of PN junction forward voltage drop, and is connected across between main pipeline (3) and the earth.
2, the lighting protection device of gas pipeline according to claim 1 is characterized in that the through-flow lightning arrester structure of described surge absorption-type is: have 3 piezoresistances (4,5,6) to be connected in parallel, an end connects main pipeline (3); Be in parallel with 3 piezoresistances (4,5,6) after thunder and lightning counter (8) is connected with another piezoresistance (7), piezoresistance (7) one ends are connected on the main pipeline (3); Electrical spark dissolving tank (9) is in parallel with thunder and lightning counter (8), and the compound leakage path structure of described PN junction forward voltage drop is: two diodes (10) reverse parallel connection is serially connected between through-flow lightning arrester of surge absorption-type and the earth.
3, the lighting protection device of gas pipeline according to claim 2, it is characterized in that: piezoresistance (4,5,6) model is respectively MYL1-47/5, MYL1-56/5, MYL1-10-620, piezoresistance (7) model of connecting with thunder and lightning counter (8) is MYL1-56/5; Thunder and lightning counter (8) model is FK-1; Diode (10) model is 2CZ 10A, and conjunction cable adopts the copper conductor that is not less than 5mm2.
4, the lighting protection device of gas pipeline according to claim 2, it is characterized in that: the structure of electrical spark dissolving tank (9) is: saturated nacl aqueous solution is housed in container, two groups of graphite electrodes are arranged in saturated nacl aqueous solution, the distance of two groups of graphite electrodes is connected with lead on the graphite electrode between the 10-50 millimeter.
5, according to the lighting protection device of claim 1 or 2 or 3 or 4 described gas pipelines, it is characterized in that: described ground connection is by processing pipe network in the CP station (1) ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620018927 CN2893383Y (en) | 2006-04-03 | 2006-04-03 | Thunderproof device for Gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620018927 CN2893383Y (en) | 2006-04-03 | 2006-04-03 | Thunderproof device for Gas pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2893383Y true CN2893383Y (en) | 2007-04-25 |
Family
ID=38061544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620018927 Expired - Fee Related CN2893383Y (en) | 2006-04-03 | 2006-04-03 | Thunderproof device for Gas pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2893383Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976829A (en) * | 2010-10-29 | 2011-02-16 | 云南大红山管道有限公司 | Long-distance pulp transporting pipeline lightning refusing system and control method thereof |
-
2006
- 2006-04-03 CN CN 200620018927 patent/CN2893383Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976829A (en) * | 2010-10-29 | 2011-02-16 | 云南大红山管道有限公司 | Long-distance pulp transporting pipeline lightning refusing system and control method thereof |
| CN101976829B (en) * | 2010-10-29 | 2014-12-10 | 云南大红山管道有限公司 | Long-distance pulp transporting pipeline lightning refusing system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA PETROLEUM +. NATURAL GAS CO., LTD. Free format text: FORMER OWNER: HUAYOU NATURAL-GAS CO., LTD., BEIJING Effective date: 20120109 Owner name: CNPC BEIJING NATURAL GAS PIPELINE CO., LTD. Effective date: 20120109 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100101 CHAOYANG, BEIJING TO: 100007 DONGCHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120109 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Co-patentee after: Petro China Beijing Natural Gas Pipeline Co., Ltd. Patentee after: China Petroleum & Natural Gas Co., Ltd. Address before: 100101 Beijing city Chaoyang District Datun Road No. 9 Patentee before: Huayou Natural-Gas Co., Ltd., Beijing |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070425 Termination date: 20140403 |