CN110311297A - A kind of close-coupled lightning protection arc extinguishing chamber unit structure and preparation method thereof - Google Patents
A kind of close-coupled lightning protection arc extinguishing chamber unit structure and preparation method thereof Download PDFInfo
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- CN110311297A CN110311297A CN201910656490.3A CN201910656490A CN110311297A CN 110311297 A CN110311297 A CN 110311297A CN 201910656490 A CN201910656490 A CN 201910656490A CN 110311297 A CN110311297 A CN 110311297A
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- Prior art keywords
- arc extinguishing
- extinguishing chamber
- chamber unit
- lightning protection
- close
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
- H01B17/46—Means for providing an external arc-discharge path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
- H01B17/48—Means for obtaining improved distribution of voltage; Protection against arc discharges over chains or other serially-arranged insulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/02—Means for extinguishing arc
- H01T1/08—Means for extinguishing arc using flow of arc-extinguishing fluid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
- H01T4/14—Arcing horns
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Fuses (AREA)
Abstract
The present invention relates to overvoltage protection technical field, specially a kind of close-coupled lightning protection arc extinguishing chamber unit structure and preparation method thereof applies to the protected working of distribution line lightning surge；The connected arc extinguishing chamber unit of multiple concatenations forms multi-chamber arc extinguishing lightning protection ontology with spheric electrode therein is encapsulated in, arc extinguishing chamber unit is a cylindrical insulation crust, shell is embedded, and there are two hemispherical chambers, the gap of connection is formed between chamber, the one end in gap is connected to the outer wall of shell, and the direction from gap to outer shell outer wall is gradually reduced to form a pyramidal pathways；Arc extinguishing chamber unit is fabricated using 3D printer；The present invention has the ability of excellent extinguishing power frequency continued flow electric arc, and structure is more compact, and small in size, breaking current is bigger, and arc extinction performance is more stable, improves route operational reliability and safety.
Description
Technical field
The present invention relates to overvoltage protection technical fields, and in particular to a kind of close-coupled lightning protection arc extinguishing chamber unit knot
Structure and preparation method thereof applies to the protected working of distribution line lightning surge.
Background technique
In thundercloud over the ground discharge process, the change dramatically of discharge channel surrounding space electromagnetic field can be maked somebody a mere figurehead nearby
Induced overvoltage is generated on line.Thundercloud possibly even directly hits distribution overhead line, generates high lightning surge.Work as thunder
When electric overvoltage is more than certain numerical value, the flashover that will lead to distribution line even breaks, and causes the destruction of supply network, this will
Directly affect the reliability of distribution system power supply.Therefore, it is necessary to the lightning surges of centering press-fitting network system, and protection to be taken to arrange
It applies.Currently, the lightning surge of medium voltage distribution network system takes safeguard procedures, there are two main classes: blocking type safeguard procedures can be divided into
The thunder and lightning for improving distribution line is resistant to insulation characterisitic, and direct lightning strike is intercepted using aerial earth wire, and the induction reduced on conducting wire is excessively electric
Pressure, and installation leakage conductor carry out clamper by the overvoltage at protection insulator both ends；Diverting type safeguard procedures basic principle is
Electric arc is dredged, does not allow electric arc calcination conducting wire.Including extending flashover path, being partially stripped insulated conductor, using portable protective gaps in parallel
Deng.
Existing scholar proposes that multistage semi-hermetic self extinguishing type arc extinguishing chamber cascaded structure has excellent arc extinction performance, by this
Structure, which is used on distribution line, can effectively solve the problems, such as that current distribution lightning protection exists.But such current existing equipment its
Arc extinguishing chamber structure is simple, and electric current breaking capacity is limited, causes its device volume big, it is difficult to install；And pacify in different routes
Shipping the used time, there is also matching problems, and its reliability and safety are to be improved.
Summary of the invention
The present invention overcomes the shortcomings of the prior art, based on multistage semi-hermetic self extinguishing type arc extinguishing chamber structure and matches cable
Road practival operating condition proposes a kind of close-coupled lightning protection arc extinguishing chamber unit structure and preparation method thereof.Compared to existing chamber
Structure, structure is more compact, and breaking current is bigger, while improving route reliability of operation and safety.
The present invention is achieved through the following technical solutions.
A kind of close-coupled lightning protection arc extinguishing chamber unit structure, the multiple arc extinguishing chamber unit structure are connected in series and embed ball
Shape electrode forms multi-chamber arc extinguishing lightning protection ontology；The arc extinguishing chamber unit is a cylindrical insulation crust, in the shell
It is embedding there are two hemispherical chamber, the gap of connection, the one end in the gap and institute are formed between two hemispherical chambers
The outer wall connection of shell is stated, and the direction from gap to outer shell outer wall is gradually reduced to form a pyramidal pathways；The multiple arc extinguishing
Chamber unit is connected to form multiple spherical chambers for being used to place the spheric electrode.
Further preferred scheme, the cylinder insulation crust is polylactic acid material.
The bottom surface radius of further preferred scheme, the cylinder insulation crust is 9-13mm.
Further preferred scheme, the spherical chamber are 80-150.
The density degree of further preferred scheme, the spherical chamber is arranged according to normal distribution law.
Further preferred scheme, the most narrow place distance d in the gap1=0.5-1.5mm, the widest part distance d2=3-5mm。
Further preferred scheme, the pyramidal pathways and outer shell outer wall form spout, the opening diameter d of the spout3=
1-2mm, the high d of the pyramidal pathways4=5-7mm。
Further preferred scheme, the high d of the pyramidal pathways4=5-7mm。
Further preferred scheme, radius R=4-6mm of the spheric electrode.
A kind of preparation method of close-coupled lightning protection arc extinguishing chamber unit structure, the arc extinguishing chamber unit use 3D printing
Machining manufacture, specifically includes following steps.
A) geometrical model of arc extinguishing chamber unit cascaded structure is established.
B) it using polylactic acid as raw material, is printed using 3D printer according to the geometrical model, when having printed an arc extinguishing
When chamber unit, printing is fixed tentatively, spheric electrode is embedded in the hemispherical cavity room, later in the arc extinguishing for being embedded with spheric electrode
Continue to print next arc extinguishing chamber unit in chamber unit, repeat before the step of, form the multi-chamber arc extinguishing lightning protection
Ontology.
The present invention is generated compared with the existing technology to be had the beneficial effect that.
It is 1) of the invention that there is multistage semi-hermetic self extinguishing type arc extinguishing chamber cascaded structure by what 3D printing technique was prepared,
Ability with excellent extinguishing power frequency continued flow electric arc, can effectively reduce insulator burn problem.
2) present invention uses necking type spout structure to multi-chamber arc extinguishing cascaded structure, compares existing structure, structure is more
Step up to gather, breaking current is bigger.
3) the self extinguishing type arc extinction type gap formed between spheric electrode in the present invention, compared to existing gap, device volume
It is smaller, it is easily installed, and arc extinction performance is more stable, it can be achieved that " non-maintaining ", improves route operational reliability and safety.
4) from the perspective of engineering design, economic convenient and line security, using between the compact self extinguishing type in the present invention
Gap arc extinguishing lightning protection device can effectively reduce the lightning stroke trip accident of distribution line, improve route reliability of operation and safety
Property, it has broad application prospects.
Detailed description of the invention
Fig. 1 is compact self extinguishing type gap arc extinguishing lightning protection device structural schematic diagram of the present invention.
Fig. 2 is arc extinguishing chamber unit side view of the present invention.
Fig. 3 is arc extinguishing chamber unit procedure of processing figure of the present invention, and wherein a is 3D printing with bottom support column
Half of arc extinguishing chamber unit schematic diagram；B is the schematic diagram that spheric electrode is placed in hemispherical cavity room；C is in spherical electricity
The schematic diagram of 3D printer printing arc extinguishing chamber unit is continued to use on extremely.
Fig. 4 is the transverse arm of upper arm of the present invention and the connection schematic diagram of vertical arms.
Fig. 5 is the connecting tool schematic diagram of upper arm of the present invention Yu lower arm connecting insulator string.
Fig. 6 is that the described two structural lumen interior air-flow speed of experimental example change over time curve.
In figure, 1 is lower arm, and 2 be the air gap, and 3 be transverse arm, and 4 be vertical arms, and 5 be insulator chain, and 6 be bolt, and 7 are
Diamond shape buckle, 8 be arc extinguishing chamber unit, and 9 be spheric electrode, and 801 be hemispherical chamber, and 802 be gap, and 803 be outer wall, 804
It is spout for pyramidal pathways, 805.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, in conjunction with reality
Example and attached drawing are applied, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to
It explains the present invention, is not intended to limit the present invention.Below with reference to the examples and drawings technical solution that the present invention will be described in detail, but
The scope of protection is not limited by this.
Embodiment 1
As shown in Figure 1, be a kind of compact self extinguishing type gap arc extinguishing lightning protection device, be by upper and lower arms 1 and the upper arm and
The air gap 2 formed between lower arm 1 forms；As shown in figure 4, the upper arm is longitudinal by one end of a transverse arm 3 and one
One end of arm 4 is connected and composed by bolt 6, as shown in figure 5, the upper end of the other end of transverse arm 3 and insulator chain 5 passes through diamond shape
Buckle 7 is connected, and one end of lower arm 1 is connected with the lower end of insulator chain by diamond shape buckle 7, the other end of lower arm 1 and indulges
To formation the air gap 2 between the other end of arm 4；The length of the air gap 2 is 60mm；Lower arm 1 is by galvanized steel bar construction, length
Degree is 700mm.
Transverse arm 3 is the arc extinguishing chamber unit 8 being connected by multiple concatenations with vertical arms 4 and is encapsulated in the arc extinguishing chamber list
Spheric electrode 9 in member 8 forms, as shown in Fig. 2, arc extinguishing chamber unit 8 is a cylindrical insulation crust, the material of insulation crust
For polylactic acid, the bottom surface radius of cylindrical shell is 12mm, and the shell is embedded there are two hemispherical chamber 801, described two
The gap 802 of connection, the most narrow place distance d in gap 802 are formed between a hemispherical chamber 8011For 1mm, the widest part distance d2For
4mm.The one end in the gap 802 is connected to the outer wall 803 of the shell, and is gradually contracted from gap 802 to the direction of outer wall 803
One pyramidal pathways 804 of small formation；Pyramidal pathways 804 and outer wall 803 form spout 805, the opening diameter d of spout 8053For
1.5mm, the high d of pyramidal pathways 8044For 6mm.Multiple arc extinguishing chamber units 8 be connected to be formed it is multiple for placing the spherical shape
The spherical chamber of electrode 9, the spherical chamber in upper arm are 80, and density is arranged according to normal distribution law.Wherein, spherical electricity
The radius R of pole 9 is 5mm.
As shown in figure 3, a kind of preparation method of compact self extinguishing type gap arc extinguishing lightning protection device, is processed using 3D printer
Transverse arm 3 and vertical arms 4 are produced, then forms upper arm after the two is connected, upper arm is bolted to the upper of insulator chain 5
It holds, then lower arm 1 is connected to the lower end of insulator chain 5, wherein fabricate out transverse arm 3 using using 3D printer and indulge
To arm 4 specifically includes the following steps:
A) arc extinguishing chamber unit is established using model editing software to connect the geometrical model of the transverse arm 3 and vertical arms 4 to be formed.
B) it using polylactic acid as raw material, is printed using 3D printer according to the geometrical model, as shown in a in Fig. 3, from most
Bottom starts, and first prints half of arc extinguishing chamber unit 8 that bottom has support column, fixes tentatively printing later, will as shown in b in Fig. 3
Spheric electrode 9 is embedded in hemispherical chamber 801, as shown in c in Fig. 3, later in the arc extinguishing chamber unit 8 for being embedded with spheric electrode 9
On continue to print next arc extinguishing chamber unit, repeat before the step of, the transverse arm 3 printed has 35 spherical chambers,
The vertical arms 4 printed has 45 spherical chambers, and spheric electrode 9 has been encapsulated in spherical cavity room, in the process of printing
In, the gap 802 being formed simultaneously between spheric electrode 9 and spout 805.
C) transverse arm 3 is connected with the end of vertical arms 4 by bolt 6, forms " 7 " font upper arm.
Experimental example 1
Impact arc test is quenched by emulation experiment and multi-chamber arc extinguishing structure and further illustrates compact self extinguishing type of the invention
The implementation result of gap arc extinguishing lightning protection device.
1, emulation experiment
The simulation model of semi-hermetic self extinguishing type arc extinguishing chamber structure, simulation analysis are built using COMSOL Mutiphsics software
The kinetic characteristic of electric arc in chamber verifies the gas of compact self extinguishing type gap arc extinguishing lightning protection device prepared by the embodiment of the present invention 1
The effect of arc is blown out, with embodiment 1 for experimental example A, and using the normal gap arc extinguishing lightning protection device of no choke structure as control
Example B.
As shown in fig. 6, be that emulation experiment two kinds of structure inner chamber indoor air velocities of resulting A, B change over time curve,
It is not difficult to find out that the chamber indoor air velocity for having throat structure that the present invention uses is significantly greater than original structure chamber interior air-flow speed
Degree has good gas blast arc-quenching ability.
2, impact arc test is quenched in multi-chamber arc extinguishing structure
It is tested using the impact electric arc that the existing testing equipment of University Of Chongqing's high-tension laboratory builds semi-hermetic self extinguishing type arc extinguishing chamber
Platform carries out impact electric arc for semi-hermetic self extinguishing type arc extinguishing cavity configuration and experimental test is quenched.It is shot and is rushed using high-speed camera
Hit electric arc from semi-hermetic self extinguishing type arc extinguishing chamber ejection after movement and extinguishing process.The result shows that the embodiment of the present invention 1 uses
Semi-hermetic self extinguishing type arc extinguishing cavity configuration can 184.8 μ s by chamber electric arc blowout extinguish.
The above content is combine specific preferred embodiment to the further description done of the present invention, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs, is not taking off
Under the premise of from the present invention, several simple deduction or replace can also be made, all shall be regarded as belonging to the present invention by being submitted
Claims determine scope of patent protection.
Claims (10)
1. a kind of close-coupled lightning protection arc extinguishing chamber unit structure, which is characterized in that the multiple arc extinguishing chamber unit structure is mutually gone here and there
Join and embed spheric electrode and forms multi-chamber arc extinguishing lightning protection ontology；The arc extinguishing chamber unit is a cylindrical insulation crust,
The shell is embedded there are two hemispherical chamber, and the gap of connection, the gap are formed between two hemispherical chambers
One end be connected to the outer wall of the shell, and the direction from gap to outer shell outer wall is gradually reduced to form a pyramidal pathways；Institute
Multiple arc extinguishing chamber units are stated to be connected to form multiple spherical chambers for being used to place the spheric electrode.
2. a kind of close-coupled lightning protection arc extinguishing chamber unit structure according to claim 1, which is characterized in that the cylinder
Insulation crust is polylactic acid material.
3. a kind of close-coupled lightning protection arc extinguishing chamber unit structure according to claim 1, which is characterized in that the cylinder
The bottom surface radius of insulation crust is 9-13mm.
4. a kind of close-coupled lightning protection arc extinguishing chamber unit structure according to claim 1, which is characterized in that in the upper arm
Spherical chamber be altogether 80-150.
5. a kind of close-coupled lightning protection arc extinguishing chamber unit structure according to claim 1, which is characterized in that the spherical shape
The density degree of chamber is arranged according to normal distribution law.
6. a kind of close-coupled lightning protection arc extinguishing chamber unit structure according to claim 1, which is characterized in that the gap
Most narrow place's distance d1=0.5-1.5mm, the widest part distance d2=3-5mm。
7. a kind of close-coupled lightning protection arc extinguishing chamber unit structure according to claim 1, which is characterized in that the cone is logical
Road and outer shell outer wall form spout, the opening diameter d of the spout3=1-2mm。
8. a kind of close-coupled lightning protection arc extinguishing chamber unit structure according to claim 1, which is characterized in that the cone is logical
The high d in road4=5-7mm。
9. a kind of compact self extinguishing type gap arc extinguishing lightning protection device according to claim 1, which is characterized in that the spherical electricity
Radius R=4-6mm of pole.
10. a kind of preparation method of close-coupled lightning protection arc extinguishing chamber unit structure as described in claim 1, which is characterized in that
The arc extinguishing chamber unit is fabricated using 3D printer, specifically includes the following steps:
A) geometrical model of arc extinguishing chamber unit cascaded structure is established；
B) it using polylactic acid as raw material, is printed using 3D printer according to the geometrical model, when having printed an arc extinguishing chamber
When unit, printing is fixed tentatively, spheric electrode is embedded in the hemispherical cavity room, later in the arc extinguishing chamber for being embedded with spheric electrode
Continue to print next arc extinguishing chamber unit on unit, repeat before the step of, form the multi-chamber arc extinguishing lightning protection ontology.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910656490.3A CN110311297A (en) | 2019-07-19 | 2019-07-19 | A kind of close-coupled lightning protection arc extinguishing chamber unit structure and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910656490.3A CN110311297A (en) | 2019-07-19 | 2019-07-19 | A kind of close-coupled lightning protection arc extinguishing chamber unit structure and preparation method thereof |
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| CN110311297A true CN110311297A (en) | 2019-10-08 |
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| CN201910656490.3A Pending CN110311297A (en) | 2019-07-19 | 2019-07-19 | A kind of close-coupled lightning protection arc extinguishing chamber unit structure and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114678775A (en) * | 2022-03-24 | 2022-06-28 | 贵州电网有限责任公司 | Eccentric Laval tube lightning protection arc extinguishing chamber structure and preparation method thereof |
| CN115693407A (en) * | 2022-10-25 | 2023-02-03 | 云南电力试验研究院(集团)有限公司 | Overhead line arc extinguishing structure for lightning protection with independent arc extinguishing cavity |
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| CN209993869U (en) * | 2019-07-19 | 2020-01-24 | 郭润生 | Compact lightning protection arc extinguishing chamber unit structure |
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| CN107834357A (en) * | 2017-10-18 | 2018-03-23 | 南阳金牛电气有限公司 | One kind series connection multi-chamber arc extinguishing lightning protection device |
| CN108063366A (en) * | 2017-12-07 | 2018-05-22 | 武汉水院电气有限责任公司 | A kind of multi-chamber clearance lightning-proof device arc blow-out structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114678775A (en) * | 2022-03-24 | 2022-06-28 | 贵州电网有限责任公司 | Eccentric Laval tube lightning protection arc extinguishing chamber structure and preparation method thereof |
| CN114678775B (en) * | 2022-03-24 | 2023-08-18 | 贵州电网有限责任公司 | Eccentric Laval pipe lightning protection arc extinguishing chamber structure and preparation method |
| CN115693407A (en) * | 2022-10-25 | 2023-02-03 | 云南电力试验研究院(集团)有限公司 | Overhead line arc extinguishing structure for lightning protection with independent arc extinguishing cavity |
| CN115693407B (en) * | 2022-10-25 | 2023-10-20 | 云南电力试验研究院(集团)有限公司 | Arc extinguishing structure with independent arc extinguishing cavities for lightning protection of overhead line |
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