CN206684261U - A kind of grounding body association of soil gap discharge path measurements device - Google Patents
A kind of grounding body association of soil gap discharge path measurements device Download PDFInfo
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- CN206684261U CN206684261U CN201720245381.9U CN201720245381U CN206684261U CN 206684261 U CN206684261 U CN 206684261U CN 201720245381 U CN201720245381 U CN 201720245381U CN 206684261 U CN206684261 U CN 206684261U
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Abstract
A kind of grounding body association of soil gap discharge path measurements device, belongs to Lightning protection field.It is characterized in that：Electric discharge observation cylinder（1）For the transparent cylinder of bottom closure, zero potential pole plate（5）Ring is affixed on electric discharge observation cylinder（1）Inwall, zero potential pole plate（5）Gap filled media is loaded with the annular cavity of formation（3）, earth conductor（2）One end is longitudinally inserted into gap filled media（3）It is interior, electric discharge observation cylinder（1）Bottom passes through grounding connection line（4）Ground connection.Measurement apparatus of the present utility model is applied to high-tension transmission overhead line structures grounded screen and is being designed, is constructing and experimental rig required during experiment, realizes the discharge path observation and breakdown radius measurement of " grounding body soil " combinational gap.Electric discharge observation cylinder generally cylindrical shape, compared to the casing of rectangular shape, the combined discharge gap formed in columnar electric discharge observation cylinder is more uniformly distributed, and discharge path is more average, and electric discharge radius is easier to measure.
Description
Technical field
A kind of grounding body association of soil gap discharge path measurements device, belongs to Lightning protection field.
Background technology
It is well known that the power infrastructures such as power system power station, transformer station, electric power line pole tower often rely on ground connection
Net realizes the discharge of lightning current.At present, the major measure of power system lightning protection includes zinc oxide surge arresters, lightning rod, enhancing
Insulator dielectric is horizontal, is hindered using automatic reclosing, tower grounding net drop etc..And practical operating experiences show, from lightning protection measures
Long-term effect and cost of investment angle consider, reduce power equipment grounded screen impulse earthed resistance be undoubtedly improve transmission line of electricity
Resistance to thunder is horizontal and reduces that transmission line lightning stroke trip accident is most economical, effective method.For a long time, due to measurement means and examination
Test equipment condition to be limited, sole indicator of the power system generally by the use of power frequency earthing resistance as measurement ground connection network parameters, but it is real
On border, lightning current is released to during greatly, and grounding body and soil constitution combined discharge gap, the process are complicated physics
Discharge process, is usually associated with electrical breakdown and thermal breakdown, totally embodies impulse grounding characteristic.
Research for grounded screen impulse grounding characteristic is the focus in domestic external ground field in recent years, and research is paid close attention to
Spark discharge effect physical process, the foundation of soil puncture mechanism and Transient grounding resistance computational mathematics model.Research circle is recognized
For：Electric-field intensity in soil exceed certain value but without the critical breakdown strength of arrival soil before, electric current and voltage are not
It is linear relationship again, and shows nonlinear electrical phenomena.Influenceed by electrical breakdown and thermal breakdown, breakdown regional soil
Conductive characteristic starts to show change, and soil resistivity declines with the increase of electric-field intensity.
The research to soil breakdown characteristics is concentrated mainly on the influence factor of soil disruptive field intensity, disruptive field intensity threshold value at present
Determination, the optical pickup of discharge path and puncture measurement of radius etc..Limited by measurement equipment, can only be led to both at home and abroad at present
Cross X-ray image technology and carry out discharge path shooting, but X-ray image technology not only needs half-light multiple spot to shoot, and estimates with greater need for approximation
Calculate, it is necessary to which certain operating experience just can guarantee that success rate.In this context, reliable, safe, repeatable grounding body is sought
Association of soil gap discharge path measurements technology is urgently to be resolved hurrily.
The content of the invention
Technical problem to be solved in the utility model is：Overcome the deficiencies in the prior art, there is provided a kind of reliable, safety,
The grounding body association of soil gap discharge path measurements device of repeatability.
The utility model solves the technical scheme that its technical problem uses：The grounding body association of soil gap discharge path
Measurement apparatus, it is characterised in that：Including electric discharge observation cylinder, connector, grounding connection line and zero potential pole plate, electric discharge observation cylinder is
The transparent cylinder of bottom closure, electric discharge observation cylinder is interior to be provided with zero potential pole plate, and zero potential pole plate ring is affixed on electric discharge observation cylinder inwall,
Gap filled media is loaded with the annular cavity that zero potential pole plate is formed, connector one end is longitudinally inserted into gap filled media
Interior, electric discharge observation cylinder bottom is grounded by grounding connection line.
Measurement apparatus of the present utility model is applied to high-tension transmission overhead line structures grounded screen and is being designed, is constructing and examination
Required experimental rig when testing, realize the discharge path observation and breakdown radius measurement of " grounding body-soil " combinational gap.Zero electricity
Position pole plate ring is affixed on electric discharge observation cylinder inwall, is loaded with gap filled media in the annular cavity that zero potential pole plate is formed, connects
Body one end is longitudinally inserted into the filled media of gap, and gap filled media is formed between connector and zero potential pole plate between electric discharge
Gap, electric discharge observation cylinder generally cylindrical shape, compared to the casing of rectangular shape, the group formed is observed in cylinder in columnar electric discharge
Close discharging gap to be more uniformly distributed, discharge path is more average, and electric discharge radius is easier to measure.
Electric discharge observation cylinder is made using transparent material non-conductive material, and the utility model can be grounded body dash current
The captured in real-time of discharge test.Soil without carrying out inverting estimation spark discharge according to filmed image punctures radius, grounding body
The electric discharge radius of each several part can directly be observed by the electric branch discharge path of transparent colloid.Device use electric discharge observation cylinder and
Gap filled media uses transparence material, improves the visuality of combinational gap discharge test.Gap filled media can be adjusted
Save resistivity, impulsive discharge characteristic of the simulation connector under different soils resistivity conditions.
Described zero potential pole plate is rolled into cylinder of the thickness less than 10cm using steel foil of the thickness less than or equal to 1mm or copper foil
Shape.
Described electric discharge observation cylinder includes cylindrical drum and insulating base, cylindrical drum bottom installation insulating base, cylindrical drum bottom
Portion is connected with insulating base by insulated bolt.
Described cylindrical drum bottom side is provided with grounding connection hole, and grounding connection line is connected at grounding connection hole and is equipped with exhausted
Edge bolt.
The height of described cylindrical drum is more than 40cm in more than 50cm, diameter.
Described insulating base is connected with zero potential pole plate bottom, and zero potential pole plate upper end is less than electric discharge observation cylinder top
2cm.Zero potential pole plate, electric discharge observation cylinder are connected in bottom perforate and using insulated bolt, and the tie point is simultaneously with being grounded phase
Connection, realize the zero potential connection between zero potential pole plate, electric discharge observation cylinder and the earth three.
Described connector includes upper connecting line, insulating sleeve and connector, and upper connecting line bottom is connected by insulating sleeve
Junctor in succession.Upper connecting line is used for the output end for connecting connector and impulse current generator, in connector and upper connecting line
The insulating sleeve that tie point upper end should use epoxy resin to prepare carries out insulation processing, the upper connecting line of placements with discharge observe cylinder it
Between form spark-over of gap.
Described connector is metal or nonmetallic ground connection conductive material, highly less than electric discharge observation cylinder overall height
80%, grounding body top is more than or equal to 15cm with electric discharge observation cylinder distance from bottom, is grounded less than 2cm at the top of electric discharge observation cylinder, bottom
Body observes the distance between cylinder inwall with electric discharge and is more than or equal to 15cm.
Compared with prior art, beneficial effect possessed by the utility model is：
Measurement apparatus of the present utility model is applied to high-tension transmission overhead line structures grounded screen and is being designed, is constructing and examination
Required experimental rig when testing, realize the discharge path observation and breakdown radius measurement of " grounding body-soil " combinational gap.Zero electricity
Position pole plate ring is affixed on electric discharge observation cylinder inwall, is loaded with gap filled media in the annular cavity that zero potential pole plate is formed, connects
Body one end is longitudinally inserted into the filled media of gap, and gap filled media is formed between connector and zero potential pole plate between electric discharge
Gap, electric discharge observation cylinder generally cylindrical shape, compared to the casing of rectangular shape, the group formed is observed in cylinder in columnar electric discharge
Close discharging gap to be more uniformly distributed, discharge path is more average, and electric discharge radius is easier to measure.
Electric discharge observation cylinder is made using transparent material non-conductive material, and the utility model can be grounded body dash current
The captured in real-time of discharge test.Soil without carrying out inverting estimation spark discharge according to filmed image punctures radius, grounding body
The electric discharge radius of each several part can directly be observed by the electric branch discharge path of transparent colloid.Device use electric discharge observation cylinder and
Gap filled media uses transparence material, improves the visuality of combinational gap discharge test.Gap filled media can be adjusted
Save resistivity, impulsive discharge characteristic of the simulation connector under different soils resistivity conditions.
Experimentation cost is low, and operating process is simple and easy to do, and difficulty of construction is low, and each tank material has anticorrosion, anti-aging spy
Property, the iterative cycles that experimental rig can be achieved utilize.Using detachable design, it is easy to assemble and stores, be not take up test site
Ground, wide adaptability, dissemination are notable.
Brief description of the drawings
Fig. 1 is grounding body association of soil gap discharge path measurements device axonometric drawing schematic diagram.
Fig. 2 is Fig. 1 front view schematic diagram.
Fig. 3 is insulating base structural representation.
Fig. 4 is zero potential electrode plate structure schematic diagram.
Wherein, 1, electric discharge observation cylinder 101, cylindrical drum 102, insulating base 103, insulation connecting hole 104, grounding connection
Hole 2, connector 201, upper connecting line 202, insulating sleeve 203, connector 3, gap filled media 4, grounding connection line
5th, zero potential pole plate.
Embodiment
Fig. 1 ~ 4 are most preferred embodiments of the present utility model, and 1 ~ 4 pair of the utility model is done furtherly below in conjunction with the accompanying drawings
It is bright.
Referring to the drawings 1 ~ 4：A kind of grounding body association of soil gap discharge path measurements device, including electric discharge are observed cylinder 1, connected
Junctor 2, grounding connection line 4 and zero potential pole plate 5, electric discharge observation cylinder 1 are the transparent cylinder of bottom closure, are discharged in observation cylinder 1
Provided with zero potential pole plate 5, the ring of zero potential pole plate 5, which is affixed on to discharge, observes the inwall of cylinder 1, in the annular cavity that zero potential pole plate 5 is formed
Gap filled media 3 is loaded with, the one end of connector 2 is longitudinally inserted into gap filled media 3, and electric discharge observation cylinder 1 bottom is by connecing
Ground connecting line 4 is grounded.It is connected after the overall observation close contact of cylinder 1 with electric discharge of zero potential pole plate 5 by grounding connection line 4 with the earth
Connect.
The height of cylindrical drum 101 is more than 40cm in more than 50cm, diameter.Zero potential pole plate 5 is less than or equal to 1mm using thickness
Steel foil or copper foil material prepare, be rolled into tubular, lap is no more than 10cm, and zero potential pole plate 5 is adopted in outside after crimping
Lap is fixed with adhesive tape.Cylindrical drum 101 and insulating base 102 use transparent acrylic material, thickness 15mm with
On, the screw that the bottom surface of cylindrical drum 101 is reserved on 8 screws, with insulating base is corresponded, and the two is connected using insulated bolt
Connect, insulated bolt is typically using the nonmetallic materials such as epoxy resin, nylon, polytetrafluoroethylene (PTFE), acrylic, insulated bolt and insulation
Need to make water-proofing treatment using rubber sheet gasket between bottom plate 102.After cylindrical drum 101 is connected with insulating base 102, outside cylinder at gap
Encapsulation process is carried out using adhesive tape.
Gap filled media 3 is prepared using agar-agar, defoamer, thickener, coagulator and pure water.Will before on-test
Agar-agar powder mixes with pure water, then adds thickener, and mixture is in integrally thick, and addition is acting type coagulator and defoaming
Agent, mixture is finally poured into the electric discharge observation cylinder 1 that connection finishes, now insert connector 2 and make fixing process, then will
Whole device stands natural cooling or is put into low-temperature test chamber and cooled down, until the transparent shape of colloid solidification.It is general saturating
Gelatin body resistivity is higher, influences the output of impulse current waveform, can be according to soil resistivity to be simulated is tested, and gap is filled out
Filling medium is mixed after being added to pure water using salt with agar-agar powder, so as to realize the regulation of resistivity.
Electric discharge observation cylinder 1 includes cylindrical drum 101 and insulating base 102, the bottom of cylindrical drum 101 installation insulating base 102, circle
The bottom of column casing 101 and the circumferential edge of insulating base 102 are correspondingly provided with multiple connection insulation connecting holes 103, and insulate connecting hole 103
Interior equipped insulated bolt, the bottom side of cylindrical drum 101 are provided with grounding connection hole 104, grounding connection are connected at grounding connection hole 104
Line 4 and equipped insulated bolt.Insulating base 102 is connected with the bottom of zero potential pole plate 5, and the upper end of zero potential pole plate 5 is less than electric discharge
Observe cylinder 12cm or so.Zero potential pole plate 5, electric discharge observation cylinder 1 are connected in bottom perforate and using insulated bolt, and the tie point is same
When be connected with grounding connection line 4, realize zero potential pole plate 5, electric discharge observation cylinder 1 and the earth three between zero potential connect
Connect.
Connector 2 includes upper connecting line 201, insulating sleeve 202 and connector 203, and the upper bottom of connecting line 201 passes through insulation
Sleeve 202 connects connector 203.Upper connecting line 201 is used for the output end for connecting connector 203 and impulse current generator,
The insulating sleeve that the tie point upper end of connector 203 and upper connecting line 201 should use epoxy resin to prepare carries out insulation processing, puts
Put and form spark-over of gap between connecting line 201 and electric discharge observation cylinder 1.Connector 2 is that metal or nonmetallic ground connection are conductive
Material, as round steel, band steel, galvanized steel, copper cover steel, copper and the compound earthing material of soft graphite, highly less than electric discharge observation cylinder 1
The 80% of overall height, the top of grounding body 203 are big less than the electric discharge observation top 2cm of cylinder 1, bottom and the electric discharge observation distance from bottom of cylinder 1
The distance between inwall of cylinder 1, which is observed, in external diameter and the electric discharge equal to 15cm, grounding body 203 is more than or equal to 15cm.
A kind of grounding body association of soil gap discharge path measurements device whole height prepared by the embodiment is 80cm,
Interior diameter is 50cm, and overall diameter 52cm, insulating base thickness is consistent with barrel, using thickness 2cm acrylic material, two
Person is attached by 8 diameter 12mm insulated bolt.Experiment covers steel earthing material to copper and carries out discharge test, and it is straight that copper covers steel
Footpath is 18mm, and length 60cm, top is connected after crimping Wiring nose with connecting line.
First it is attached before experiment according to the connection figure shown in Fig. 2, agar-agar powder is entered with being heated to the pure water of boiling
Row is mixed, and proper quantity of defoaming agent and i.e. acting type coagulator are instilled after uniform stirring, pours the mixture into the electric discharge observation that sealing finishes
In cylinder 1, copper is covered into steel earthing material and is placed on mixture center, the insulating sleeve 202 in the end sleeve of grounding body 203, insulation sleeve
Cylinder 202 is immersed in gap filled media about 2cm, and whole device is placed into low-temperature test chamber, and holding 24 is small at a temperature of -5 DEG C
Shi Hou, take out whole experimental rig and recover to room temperature.Before discharge test starts, whole electric discharge device need to stand 48 hours, then
Device is connected to impulse current generator, regulation test current peak value 40kA, is put to 2.6/50 μ s standard thunder discharge waveforms
Electricity can be in transparent colloid it can be seen that clearly spark discharge branch vestige, and can measure gap filling after terminating
Effective breakdown radius of medium.The grounding body association of soil gap discharge path measurements device provided using the utility model patent
Flash-over characteristic observation of the body under dash current can be grounded, ginseng is provided for the construction and type selecting of power system grounded screen
Examine.
It is described above, only it is preferred embodiment of the present utility model, is not that other forms are made to the utility model
Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent
The equivalent embodiment of change.But it is every without departing from the content of the technical scheme of the utility model, it is real according to technology of the present utility model
Any simple modification, equivalent variations and the remodeling that confrontation above example is made, still fall within the guarantor of technical solutions of the utility model
Protect scope.
Claims (8)
- A kind of 1. grounding body association of soil gap discharge path measurements device, it is characterised in that：Cylinder is observed including electric discharge（1）, connect Earthed conductor（2）, grounding connection line（4）With zero potential pole plate（5）, electric discharge observation cylinder（1）For the transparent cylinder of bottom closure, electric discharge Observe cylinder（1）It is interior to be provided with zero potential pole plate（5）, zero potential pole plate（5）Ring is affixed on electric discharge observation cylinder（1）Inwall, zero potential pole plate （5）Gap filled media is loaded with the annular cavity of formation（3）, earth conductor（2）One end is longitudinally inserted into gap filled media （3）It is interior, electric discharge observation cylinder（1）Bottom passes through grounding connection line（4）Ground connection.
- A kind of 2. grounding body association of soil gap discharge path measurements device according to claim 1, it is characterised in that：Institute The zero potential pole plate stated（5）Tubular of the thickness less than 10cm is rolled into using steel foil of the thickness less than or equal to 1mm or copper foil.
- A kind of 3. grounding body association of soil gap discharge path measurements device according to claim 1, it is characterised in that：Institute The electric discharge observation cylinder stated（1）Including cylindrical drum（101）And insulating base（102）, cylindrical drum（101）Bottom is installed by insulating base （102）, cylindrical drum（101）Bottom and insulating base（102）Connected by insulated bolt.
- A kind of 4. grounding body association of soil gap discharge path measurements device according to claim 3, it is characterised in that：Institute The cylindrical drum stated（101）Bottom side is provided with grounding connection hole（104）, grounding connection hole（104）Place's connection grounding connection line（4） And equipped insulated bolt.
- A kind of 5. grounding body association of soil gap discharge path measurements device according to claim 4, it is characterised in that：Institute The cylindrical drum stated（101）Height be more than 40cm in more than 50cm, diameter.
- A kind of 6. grounding body association of soil gap discharge path measurements device according to claim 3, it is characterised in that：Institute The insulating base stated（102）With zero potential pole plate（5）Bottom is connected, zero potential pole plate（5）Upper end is less than electric discharge observation cylinder（1） Top 2cm.
- A kind of 7. grounding body association of soil gap discharge path measurements device according to claim 1, it is characterised in that：Institute The earth conductor stated（2）Including upper connecting line（201）, insulating sleeve（202）And connector（203）, upper connecting line（201）Bottom Pass through insulating sleeve（202）Connect connector（203）.
- A kind of 8. grounding body association of soil gap discharge path measurements device according to claim 7, it is characterised in that：Institute The earth conductor stated（2）For metal or nonmetallic ground connection conductive material, highly cylinder is observed less than electric discharge（1）The 80% of overall height, Connector（203）Top is less than electric discharge observation cylinder（1）Top 2cm, bottom and electric discharge observation cylinder（1）Distance from bottom is more than or equal to 15cm, connector（203）Cylinder is observed with electric discharge（1）The distance between inwall is more than or equal to 15cm.
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| CN201720245381.9U CN206684261U (en) | 2017-03-14 | 2017-03-14 | A kind of grounding body association of soil gap discharge path measurements device |
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| CN201720245381.9U CN206684261U (en) | 2017-03-14 | 2017-03-14 | A kind of grounding body association of soil gap discharge path measurements device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415340A (en) * | 2020-10-27 | 2021-02-26 | 清华大学 | Device and method for observing three-dimensional discharge morphology of soil around grounding body |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112415340A (en) * | 2020-10-27 | 2021-02-26 | 清华大学 | Device and method for observing three-dimensional discharge morphology of soil around grounding body |
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