CN2610539Y - Arc-tight puncture armour clamp for preventing breakage of overhead insulated wire by thunderstrike - Google Patents
Arc-tight puncture armour clamp for preventing breakage of overhead insulated wire by thunderstrike Download PDFInfo
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- CN2610539Y CN2610539Y CN 03203468 CN03203468U CN2610539Y CN 2610539 Y CN2610539 Y CN 2610539Y CN 03203468 CN03203468 CN 03203468 CN 03203468 U CN03203468 U CN 03203468U CN 2610539 Y CN2610539 Y CN 2610539Y
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- tight
- gold utensil
- electrode
- arc
- puncture gold
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Abstract
The utility model discloses an arc-proof puncture metal tool for preventing the aerial insulating wire from the lightning strike and the wire breaking, characterized in that the arc-proof puncture metal tool comprises a puncture cable clamp which is composed of an upper press block (7) and a lower press block (5) and penetrated through a conductor inside an insulating layer of an insulating wire (1) to electrically contact with the conductor; a earth arc striking electrode (3); an arc-proof electrode (6) which is electrically connected with the puncture cable clamp; and an insulating cover which is fixed on the outside of the puncture cable clamp for insulating and limiting the arc and doesn't seal the bottom edge, wherein, equipping the position of the earth arc striking electrode makes to discharge between the puncture cable clamp and the earth arc striking electrode when the thunder happens, and also makes an afterflow industrial frequency electric arc move to the arc-proof electrode to burn, thereby preventing the insulating wire from being damaged. The utility model has the characteristics of preventing from the lightning strike and the wire breaking, not stripping the insulating layer of the wire, having simple construction, adding the insulating cover additionally, having high safe reliability and filling up the domestic technical blankness.
Description
Technical field
The utility model relates to the electric power system overhead distribution, relates in particular to a kind of are-tight puncture gold utensil that is used to prevent the suspended insulated guide wire lightning-caused breaking, and it is particularly suitable for using on the 10kV suspended insulated guide wire.
Technical field
In order to reduce the overhead distribution fault that external causes such as trees, birds, accumulated snow cause, improve power supply reliability, developed country gradually adopts suspended insulated guide wire from the later stage in the sixties in the world.China begins that from the eighties city overhead distribution net is implemented insulating and transforms pilot.The nineties begins to apply.
Insulated conductor has solved corridor that plain conductor can't resolve and safety problem really, compares with cable, reduced investment, builds soon, and advantage is fairly obvious.But the lightning-caused breaking problem is but very outstanding.Japan reaches a conclusion in the research of early seventies: the insulated conductor thunderbolt must be broken.For example: 1998, lightening activity was strong, the 10kV insulated overhead line generation lightning-caused breaking of Beijing Power Supply Bureau's administration 14 times.Therefore, the lightning-caused breaking problem must be properly settled, the safe operation of overhead insulating power distribution network could be guaranteed.
The lightning-caused breaking principle of insulated conductor has been compared obviously different with plain conductor.When direct lightning strike or lightning induced voltage acted on plain conductor and cause insulator arc-over, the power frequency short circuit current electric arc that continues moved to deviating from the power supply direction along lead under electrodynamic effect, and lead is very little by the probability of serious burn.Insulated conductor is then different, lightning overvoltage at first punctures wire insulation and then causes insulator arc-over, breakdown insulating barrier is a pin hole shape, the power frequency short circuit current electric arc that continues is subjected to the anti-coagulating action that insulate on every side, the arc root can only will fitly be blown at extremely short time inside conductor in the burning of pin hole place.
According to the mechanism of above-mentioned insulated conductor lightning-caused breaking, the corresponding precautionary measures have " dredge and stop up " dual mode." dredging " is exactly with near the local bare wireization of the insulated conductor the insulator, make power frequency arc arc root shift or be fixed on the special gold utensil and burn, thereby guardwire avoids burn.For example, peeling off insulating barrier at insulator and wire coupling place adopts arc protection molded lines folder or the insulated conductor of insulator both sides is peeled off one section insulating barrier and installed the preventing arc wire clamp additional." obstruction " is exactly to stop the power frequency continued flow starting the arc behind the lightning stroke flashover.For example, adopt the current-limiting arc-extinguishing angle, i.e. the ring-like external series gap metal oxide arrester of band series connection.
Though above-mentioned dual mode can prevent lightning-caused breaking effectively, there is following deficiency:
1. present existing arc-preventing metal utensil, in use, insulated conductor need be peeled off long length, and exposed part is bigger, and this can have certain influence to the sealing and the insulation of lead.
2. use lightning arrester, though protection effect is good, construction and installation complexity, investment are big.
The utility model content
The technical problems to be solved in the utility model provides a kind of are-tight puncture gold utensil that is used to prevent the suspended insulated guide wire lightning-caused breaking that overcomes the new structure of above-mentioned defective of the prior art.
To achieve these goals, of the present utility modelly be used to prevent that the are-tight puncture gold utensil of suspended insulated guide wire lightning-caused breaking from comprising: by the penetrating cable clamp that upper holder block and lower lock block constitute, the insulating barrier and the conductor inside that penetrate insulated conductor closely electrically contact; The ground connection arc electrode; Are-tight electrode electrically connects with penetrating cable clamp; Insulating cover, the outside that is fixed on penetrating cable clamp is used for insulation and limit arc, and the end of insulating cover, is along blow-by, wherein, the position of ground connection arc electrode is set, makes when thunder and lightning takes place, discharge between penetrating cable clamp and the ground connection arc electrode, the afterflow power frequency arc is moved on the are-tight electrode burn.
Are-tight puncture gold utensil of the present utility model has anti-lightning strike broken string, does not peel off wire insulation, construction is simple, subsidiary insulating cover, security reliability height, fill up the characteristics of domestic technique blank.Particularly; it has the following advantages: (1) because are-tight puncture gold utensil penetrates the insulating barrier of insulated conductor, closely electrically connects with the plain conductor of inside, after the thunder discharge; the arc root of the power frequency short circuit current electric arc that continues be fixed on the puncture gold utensil are-tight electrode on burn, guardwire avoid the burn.(2) are-tight puncture gold utensil of the present utility model need not to peel off insulating barrier, can draw high-voltage.The puncture cutter tooth is clamp-oned insulating barrier in the mode of a pressure, and is very little to the wire insulation damage.Stab knife tooth surface coating electrically conductive silicone grease can prevent that moisture from entering lead inside.(3) the are-tight electrode of are-tight puncture gold utensil has enough thickness and volume, stands repeatedly burning of power frequency arc.(4) adopt the torsion nut, make the degree of depth of puncture reasonable, can well contact, can not influence the intensity and the performance of insulated conductor again with insulated conductor.(5) ground connection arc electrode reliable ground.During installation, the ground connection arc electrode is positioned at the below of penetrating cable clamp, with penetrating cable clamp spacing 100-250 millimeter, can guarantee that lightning discharge occurs on the are-tight puncture gold utensil.(6) add insulating cover in are-tight puncture gold utensil outside, can reduce the accident that causes owing to reasons such as foreign matter collisions, simultaneously the structure of insulating cover is optimized, exist unimpeded electric arc to burn passage when guaranteeing to be struck by lightning.(7) are-tight puncture gold utensil is easy for installation, quick, satisfies the action need of job site.(8) good mechanical property of are-tight puncture gold utensil, the insulation property of insulating cover, antifouling property and weather protection ageing properties are good.
Description of drawings
Fig. 1 is the overall installation schematic diagram of the are-tight puncture gold utensil of the utility model;
Fig. 2 is the schematic diagram of are-tight puncture gold utensil first embodiment of the utility model;
Fig. 3 is the schematic diagram of are-tight puncture gold utensil second embodiment described in the utility model;
Fig. 4 is the feature schematic diagram of the are-tight puncture gold utensil of the utility model penetrating cable clamp;
Fig. 5 is the feature schematic diagram of the are-tight puncture gold utensil of the utility model insulating cover;
Fig. 6 is the wiring schematic diagram that the are-tight puncture gold utensil of the utility model is used for the lightning impulse discharge test;
Fig. 7 a is that the are-tight puncture gold utensil of the utility model is used for the power frequency arc wiring schematic diagram in when test;
Fig. 7 b is that the are-tight puncture gold utensil of the utility model is used for the power frequency arc layout schematic diagram in when test.
Embodiment
Specifically describe embodiment of the present utility model below with reference to accompanying drawing, wherein identical label is represented identical parts.
With reference now to Fig. 1, specifically describe the concrete mounting structure that is used for the are-tight puncture gold utensil of suspended insulated guide wire of the present utility model, it mainly comprises: puncture wire clamp, are-tight electrode 6, torsion nut 8, ground connection arc electrode 3, the insulating cover 4 be made up of upper holder block 7 and lower lock block 5.Wherein, penetrating cable clamp penetrates the external insulation layer of insulated conductor 1, closely electrically contacts with insulated conductor 1 conductor inside, so that its current potential is identical; When thunder and lightning takes place, discharge between penetrating cable clamp and the ground connection arc electrode 3, the afterflow power frequency arc moves on the are-tight electrode 6 and burns, thus protection insulated conductor 1 is injury-free.
Wherein, suspended insulated guide wire 1 for unidirectional power supply power supply, are-tight puncture gold utensil is installed on line insulator (for example post insulator) 2 load side, are-tight electrode 6 line insulator 2 is dorsad placed, ground connection arc electrode 3 is electrically connected with the earth terminal of line insulator 2, and is positioned at the same side of this line insulator with the puncture gold utensil; Suspended insulated guide wire 1 for the bi-directional power power supply, in line insulator 2 both sides are-tight puncture gold utensil to be installed all, during installation, are-tight electrode 6 line insulator 2 is dorsad placed, will closely electrically connect with exposed lead between two are-tight puncture gold utensils, ground connection arc electrode 3 is electrically connected with the earth terminal of line insulator 2.
And, must guarantee that the penetrating cable clamp of are-tight puncture gold utensil is identical with the current potential of are-tight electrode 6.Penetrating cable clamp and are-tight electrode 6 can adopt and compress, thread connection, also can become one by modes such as casting or machinings.For best aluminium alloy of penetrating cable clamp or copper product, for the best aluminium alloy of are-tight electrode, copper or stainless steel material.
Above-mentioned ground connection arc electrode 3 is made by metal material, can be shaft-like, ring-type or other shape, but will satisfy following requirement.Ground connection arc electrode 3 is answered reliable ground, guarantees to be positioned at the penetrating cable clamp below, with penetrating cable clamp spacing 100-250 millimeter.
Above-mentioned are-tight electrode 6 is made by metal or electric conducting material, can make separately, also can make one with penetrating cable clamp.The length of are-tight electrode is greater than 60 millimeters, and the beeline of its end and wire insulation is greater than 20 millimeters.
Fig. 2 shows first kind of form of the composition of the torsion nut 8 in the are-tight puncture gold utensil, upper holder block 7 and lower lock block 5 among Fig. 1.Show the are-tight puncture gold utensil of another kind of structure as Fig. 3, are-tight electrode wherein comprises the first half 10 and the latter half, and the latter half of last lower lock block and are-tight electrode is processed as an one-piece parts 9.The shape and size of upper and lower briquetting can have different choice, but will satisfy following requirement.
As shown in Figure 4, on upper holder block 7 and lower lock block 5 and insulated conductor 1 contacted surface, be provided with groove 11, play the effect of fixing cord.The end radius of circle R of groove 11 and the radius of insulated conductor 1 are complementary, groove 11 middle parts are the cutter tooth of perverse shape, the quantity of cutter tooth is 6-48, the point of a knife of all cutters tooth is positioned on the cylindrical profile face that radius is R1, R1 and insulated conductor 1 conductor inside section radius are complementary, and error is positive and negative 5 millimeters.The surface applied conductive seal glue of cutter tooth.After last lower lock block compresses lead, be the 0.5-5 millimeter at a distance of the clearance distance D between the closest approach therebetween.Compress lower lock block by torsion nut 8, make cutter tooth penetrate the lead external insulation layer, with the tight electrical coupling of metal of inside.Torsion nut 8 the regulation stress under can rupture, thereby make penetrating cable clamp both with the lead close-coupled, can not destroy insulated conductor 1 again.
As shown in Figure 5, insulating cover 4 places the outside of penetrating cable clamp, plays the insulating protection effect.Insulating cover 4 adopts the organic composite material manufacturing, has good flame retardancy, weather resistance and insulation property.Insulating cover 4 can have different shape and size, but the end of insulating cover 4 along blow-by, keep the gap of at least 2 mm wides along the lead direction, run through exposed electric arc movable passageway to form penetrating cable clamp, are-tight electrode 6, to form.
More than described the concrete structure that the utility model is used for the are-tight puncture gold utensil of suspended insulated guide wire,, further specified implementation result of the present utility model below by test data.
1. lightning impulse discharge test
This test is in order to check under the lightning impulse effect, and whether can flashover all on are-tight puncture gold utensil 2, locate the power frequency arc path effectively.
Test connection as shown in Figure 6, each parts is respectively among the figure: impulse voltage generator G, oscilloscope S, resitstance voltage divider D, insulated conductor 1, line insulator 2, are-tight puncture gold utensil 12.Result of the test sees Table 1, and each discharge all occurs on the are-tight puncture gold utensil 12.
Puncture gold utensil lightning impulse test result that table 1 is are-tight
| Flashover voltage kV | Discharge time delay μ s | Flashover mode (each voltage applies 20 times) | |
| To gold utensil flashover number of times | Not by gold utensil flashover number of times | ||
| 226.5 | 4.73 | 20 | 0 |
| 253.6 | 2.41 | 20 | 0 |
| 284.5 | 1.8 | 20 | 0 |
| 306.4 | 1.45 | 20 | 0 |
| 320.5 | 1.20 | 20 | 0 |
| 344.3 | 1.00 | 20 | 0 |
| 363.6 | 0.86 | 20 | 0 |
Result of the test shows, installs are-tight puncture gold utensil 12 described in the utility model, all occurs on the are-tight puncture gold utensil 12 at flashover under the Lightning Over-voltage effect, can locate the power frequency arc path effectively.
2. power frequency arc test
Can this test be in order to check power frequency continued flow electric arc arc root behind the lightning stroke flashover be fixed on the effect that burning, are-tight puncture gold utensil 12 burn on the are-tight puncture gold utensil 12 degree and guardwire avoid burning.
Test connection is shown in Fig. 7 a, and each parts is respectively among the figure: power supply P, switch tool K, transformer T, isolating switch K1, K2, reactor L1, current transformer CT, line insulator 2 and are-tight puncture gold utensil 12, shown in Fig. 7 b, install.The about 12.5kA of amplitude of short circuit, duration 0.23s, the test of the short circuit power frequency of closing a floodgate arcing.
Find that are-tight electrode burns vestige after checking test product, but insulated conductor is not burnt.Result of the test shows that are-tight puncture gold utensil 12 is installed in load side, and electric arc arc root is fixed on the are-tight electrode of are-tight puncture gold utensil 12 and burns, and guardwire avoids burn effectively.
Above result of the test shows that are-tight puncture gold utensil described in the utility model can prevent 10kV suspended insulated guide wire lightning-caused breaking effectively.
In addition, line insulator in the are-tight puncture gold utensil of the present utility model is not limited to the post insulator in the foregoing description, also can use the insulator of suspension insulator and other form, dependency structure can be changed accordingly with reference to foregoing, this is very clearly for those of ordinary skills, for avoiding repetition in the description of this omission to it.
Although the utility model is described; but foregoing description just for illustrative purposes; the utility model is not limited to above-mentioned specific descriptions in conjunction with the accompanying drawings; those of ordinary skills can not break away from the various changes of the utility model spirit to it, and protection range of the present utility model is limited by the accompanying Claim book.
Claims (14)
1. are-tight puncture gold utensil that is used to prevent the suspended insulated guide wire lightning-caused breaking is characterized in that described are-tight puncture gold utensil comprises:
By the penetrating cable clamp that upper holder block (7) and lower lock block (5) constitute, the insulating barrier and the conductor inside that penetrate insulated conductor (1) closely electrically contact;
Ground connection arc electrode (3);
Are-tight electrode (6) electrically connects with penetrating cable clamp;
Insulating cover (4), the outside that is fixed on penetrating cable clamp are used for insulation and limit arc, and the end of insulating cover (4) is along blow-by,
Wherein, the position of ground connection arc electrode is set, makes when thunder and lightning takes place, discharge between penetrating cable clamp and the ground connection arc electrode, the afterflow power frequency arc is moved on the are-tight electrode burn.
2. are-tight puncture gold utensil as claimed in claim 1, it is characterized in that: for the suspended insulated guide wire of unidirectional power supply power supply, described are-tight puncture gold utensil is installed on the load side of line insulator (2), are-tight electrode line insulator (2) is dorsad placed, ground connection arc electrode (3) is electrically connected with the earth terminal of line insulator (2), and is positioned at the same side of this line insulator with the puncture gold utensil.
3. are-tight puncture gold utensil as claimed in claim 1, it is characterized in that: for the suspended insulated guide wire of bi-directional power power supply, in the both sides of line insulator (2) are-tight puncture gold utensil is installed all, are-tight electrode line insulator (2) placement dorsad during installation, with exposed lead close-coupled, ground connection arc electrode (3) is electrically connected with the earth terminal of line insulator (2) between two are-tight puncture gold utensils.
4. as each described are-tight puncture gold utensil among the claim 1-3, it is characterized in that: penetrating cable clamp and are-tight electrode (6) adopt and compress, thread connection.
5. as each described are-tight puncture gold utensil among the claim 1-3, it is characterized in that: penetrating cable clamp aluminium alloy or copper product, are-tight electrode aluminium alloy, copper or stainless steel material.
6. as each described are-tight puncture gold utensil among the claim 1-3, it is characterized in that: on the contacted surface of described upper holder block and lower lock block and insulated conductor, be provided with the groove (11) of fixing cord, the end radius of circle (R) of groove (11) is complementary with the radius of insulated conductor (1), the middle part of groove (11) is a plurality of cutters tooth of thorn-like, the point of a knife of each cutter tooth is positioned on the cylindrical profile face that is complementary with insulated conductor (1) conductor inside section radius, make described cutter tooth after lower lock block compresses lead on described penetrate lead external insulation layer and with the tight electrical coupling of metal of inside.
7. are-tight puncture gold utensil as claimed in claim 6 is characterized in that: the quantity of described cutter tooth is 6-48.
8. are-tight puncture gold utensil as claimed in claim 6 is characterized in that: the surface applied conductive seal glue of cutter tooth.
9. are-tight puncture gold utensil as claimed in claim 6 is characterized in that: after upward lower lock block compresses lead, be the 0.5-5 millimeter at a distance of the clearance distance (D) between the closest approach therebetween.
10. are-tight puncture gold utensil as claimed in claim 1 is characterized in that: described are-tight puncture gold utensil also comprises the torsion nut (8) that is used for fixing penetrating cable clamp, and described torsion nut can rupture under the stress of regulation.
11. are-tight puncture gold utensil as claimed in claim 1 is characterized in that: ground connection arc electrode (3) can be shaft-like, ring-type.
12. are-tight puncture gold utensil as claimed in claim 1, it is characterized in that: the ground connection arc electrode is positioned at the below of penetrating cable clamp, with the spacing of penetrating cable clamp be the 100-250 millimeter.
13. are-tight puncture gold utensil as claimed in claim 1 is characterized in that: are-tight electrode (6) length is greater than 60 millimeters, and the beeline of its end and wire insulation is greater than 20 millimeters.
14. are-tight puncture gold utensil as claimed in claim 1 is characterized in that: insulating cover keeps the gap of at least 2 mm wides along the lead direction, exposing penetrating cable clamp and are-tight electrode, and forms the electric arc movable passageway that runs through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03203468 CN2610539Y (en) | 2003-03-10 | 2003-03-10 | Arc-tight puncture armour clamp for preventing breakage of overhead insulated wire by thunderstrike |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03203468 CN2610539Y (en) | 2003-03-10 | 2003-03-10 | Arc-tight puncture armour clamp for preventing breakage of overhead insulated wire by thunderstrike |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2610539Y true CN2610539Y (en) | 2004-04-07 |
Family
ID=34158151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03203468 Expired - Lifetime CN2610539Y (en) | 2003-03-10 | 2003-03-10 | Arc-tight puncture armour clamp for preventing breakage of overhead insulated wire by thunderstrike |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2610539Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104733880A (en) * | 2013-12-20 | 2015-06-24 | 国家电网公司 | Electric transmission line and ground wire thereof |
-
2003
- 2003-03-10 CN CN 03203468 patent/CN2610539Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104733880A (en) * | 2013-12-20 | 2015-06-24 | 国家电网公司 | Electric transmission line and ground wire thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20030310 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |