CN103594278B - A kind of sulfur hexafluoride loading switch - Google Patents
A kind of sulfur hexafluoride loading switch Download PDFInfo
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- CN103594278B CN103594278B CN201310634282.6A CN201310634282A CN103594278B CN 103594278 B CN103594278 B CN 103594278B CN 201310634282 A CN201310634282 A CN 201310634282A CN 103594278 B CN103594278 B CN 103594278B
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- China
- Prior art keywords
- lower terminal
- sulfur hexafluoride
- insulating lid
- terminal
- housing
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- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 42
- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 41
- 239000004945 silicone rubber Substances 0.000 claims abstract description 21
- 238000010073 coating (rubber) Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 229920002631 room-temperature vulcanizate silicone Polymers 0.000 claims abstract description 19
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 17
- 230000003075 superhydrophobic effect Effects 0.000 claims abstract description 14
- 239000012212 insulator Substances 0.000 claims description 9
- 229920002379 silicone rubber Polymers 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000009736 wetting Methods 0.000 abstract description 4
- 230000005661 hydrophobic surface Effects 0.000 abstract description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Abstract
The invention discloses a kind of sulfur hexafluoride loading switch, comprising: the upper insulating lid be oppositely arranged and lower insulating lid; Be arranged on the upper terminal that described upper insulating lid deviates from described lower insulating lid side; Be arranged on the lower terminal that described lower insulating lid deviates from described upper insulating lid side, is oppositely arranged with described upper terminal; Wherein, the surface of described lower terminal is provided with hydrophobic coating.The super-hydrophobic RTV silicone rubber coating on the surface of the lower terminal of described sulfur hexafluoride loading switch has hydrophobic surface and not easily forms moisture film, the globule landing that during surface wetting, steam can be formed, the minimum water droplet of only a few is only had to be attached to super-hydrophobic RTV silicone rubber coating surface, and easily taken away by the globule of other landings, surface is ponding not easily, so be difficult to produce Leakage Current, not easily Discharge Phenomena, fail safe is high.
Description
Technical field
The present invention relates to switchgear technical field, more particularly, relate to a kind of sulfur hexafluoride loading switch.
Background technology
On-load switch is a kind of switching device of the simple arc-control device of e-mail, uses sulfur hexafluoride gas to become sulfur hexafluoride loading switch as the on-load switch of insulation and arc-extinguishing medium.It may be used for folding and switch load electric current and overload current, can also be used for folding and cut-off nonloaded line, no-load transformer and Capacitor banks.
Sulfur hexafluoride loading switch is made up of the upper insulating lid be oppositely arranged and lower insulating lid, is provided with sulfur hexafluoride gas therein, and upper insulating lid is provided with upper terminal, and lower insulating lid is provided with the lower terminal corresponding with described upper terminal.
The lower terminal of sulfur hexafluoride loading switch is concave structure, and surface easily makes moist ponding, causes the easy Discharge Phenomena in the surface of lower terminal, causes fail safe low.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of sulfur hexafluoride loading switch, described sulfur hexafluoride loading switch avoids the ponding problem of making moist of lower terminal, and fail safe is high.
For achieving the above object, the invention provides following technical scheme:
A kind of sulfur hexafluoride loading switch, this sulfur hexafluoride loading switch comprises:
The upper insulating lid be oppositely arranged and lower insulating lid;
Be arranged on the upper terminal that described upper insulating lid deviates from described lower insulating lid side;
Be arranged on the lower terminal that described lower insulating lid deviates from described upper insulating lid side, is oppositely arranged with described upper terminal;
Wherein, the surface of described lower terminal is provided with hydrophobic coating.
Preferably, in above-mentioned sulfur hexafluoride loading switch, described hydrophobic coating is super-hydrophobic RTV silicone rubber coating.
Preferably, in above-mentioned sulfur hexafluoride loading switch, also comprise:
Be arranged on the increase creep distance skirt in described lower terminal, described increase creep distance skirt comprises: the first housing be oppositely arranged and the second housing;
Wherein, described first housing is for surrounding described lower terminal; The A/F of described second housing is increased gradually by the direction deviating from described first housing; The public bottom surface of described first housing and the second housing is provided with the opening of the wiring pile of lower terminal.
Preferably, in above-mentioned sulfur hexafluoride loading switch, the side of described second housing is provided with side opening, and described side opening is for drawing the metallic gasket at the wiring pile place of described lower terminal.
Preferably, in above-mentioned sulfur hexafluoride loading switch, described increase creep distance skirt is that silicon rubber increases creep distance skirt.
Preferably, in above-mentioned sulfur hexafluoride loading switch, described sulfur hexafluoride loading switch comprises: 3 upper terminals and 3 lower terminal, described upper terminal and described lower terminal one_to_one corresponding.
Preferably, in above-mentioned sulfur hexafluoride loading switch, described upper terminal is epoxy resin insulator.
As can be seen from technique scheme, sulfur hexafluoride loading switch provided by the present invention comprises: the upper insulating lid be oppositely arranged and lower insulating lid; Be arranged on the upper terminal that described upper insulating lid deviates from described lower insulating lid side; Be arranged on the lower terminal that described lower insulating lid deviates from described upper insulating lid side, is oppositely arranged with described upper terminal; Wherein, the surface of described lower terminal is provided with super-hydrophobic RTV silicone rubber coating.The super-hydrophobic RTV silicone rubber coating on the surface of the lower terminal of described sulfur hexafluoride loading switch has hydrophobic surface and not easily forms moisture film, the globule landing that during surface wetting, steam can be formed, the minimum water droplet of only a few is only had to be attached to super-hydrophobic RTV silicone rubber coating surface, and easily taken away by the globule of other landings, surface is ponding not easily, so be difficult to produce Leakage Current, not easily Discharge Phenomena, fail safe is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of sulfur hexafluoride loading switch that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the another kind of sulfur hexafluoride loading switch that Fig. 2 provides for the embodiment of the present invention;
A kind of structural representation increasing creep distance skirt that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Just as described in the background section, the lower terminal of sulfur hexafluoride loading switch is concave structure, and surface easily makes moist ponding, causes the easy Discharge Phenomena in the surface of lower terminal, causes fail safe low.
Because lower terminal is concave structure, air flow property is poor, by the time of tide; the easy ponding of insulator surface of lower terminal; form moisture film at insulator surface, under the effect of electric field, Leakage Current raises along with the rising of voltage, is easy to form current loop; thus cause flashover; there are electric discharge phenomena, cause the surface of insulator to sinter, time serious, even can puncture insulator; cause leakage of sulfur hexafluoride gas, cause the security incident of power-off and crisis personal safety.
For solving the problem, the embodiment of the present application provides a kind of sulfur hexafluoride loading switch, and with reference to figure 1, described sulfur hexafluoride loading switch comprises: the upper insulating lid 1 be oppositely arranged and lower insulating lid 2; The upper terminal 3 that described upper insulating lid 1 deviates from described lower insulating lid 2 side is set; Be arranged on the lower terminal 4 that described lower insulating lid 2 deviates from described upper insulating lid side, is oppositely arranged with described upper terminal 3.Described lower terminal 4 is arranged in the insulating cover 5 of described lower insulating lid 2, is concave structure, and the top of described lower terminal is wiring pile 6.
The surface (insulator surface outside removing wiring pile 6) of described lower terminal 4 is provided with hydrophobic coating.Hydrophobic coating can reduce ponding during lower terminal surface wetting.
Described hydrophobic coating can be common RTV silicone rubber coating, also can be super-hydrophobic RTV(room temperature vulcanized) silicone rubber coating.The present embodiment preferably adopts the good super-hydrophobic RTV silicone rubber coating of hydrophobicity.
In the exemplary embodiment illustrated in fig. 2, described sulfur hexafluoride loading switch is provided with 3 upper terminals and 3 lower terminal, described upper terminal and described lower terminal one_to_one corresponding.The insulator of described upper terminal and lower terminal is the epoxy resin insulator with good electrical insulating property.
Below by contrast test illustrate without coating time, have a common RTV silicone rubber coating time and have a super-hydrophobic RTV silicone rubber coating time lower terminal wet Power Flashover Voltage, reference table 1, table 1 is the result of the test of the Power Flashover Voltage that wets during different coating:
Table 1
From table 1 above, apply its wet Power Flashover Voltage of lower terminal of common RTV silicone rubber coating apparently higher than uncoated lower terminal, and the wet Power Flashover Voltage being coated with the lower terminal of super-hydrophobic RTV silicone rubber coating is owing to applying the lower terminal of common RTV silicone rubber coating.
This is because after uncoated lower terminal surface wetting ponding, be easy to form moisture film on surface, under the effect of power plant, Leakage Current raises along with the rising of voltage, is easy to form current loop, thus causes flashover, discharges.
And the lower terminal being coated with common RTV silicone rubber coating can only form mutual disjunct droplet because its hydrophobic surface is difficult to form moisture film, along with the increase of the globule, the globule can be dirty along surface under gravity, interrupted thread water route can only be formed, thus cause less leakage voltage, and then higher flashover voltage can be obtained.
In like manner, be coated with the lower terminal of super-hydrophobic RTV silicone rubber coating, surface water drops roll angle due to super-hydrophobic RTV silicone rubber coating is 8 °-10 ° (much smaller than common hydrophobic coating 60 °-80 ° globule roll angles), the globule formed is easy to landing on its surface, surface not easily forms the current loop that moisture film causes, so the generation of surperficial Leakage Current effectively can be prevented, there is very high wet flash-over voltage, high wet flash-over voltage makes the threshold voltage of surface discharge higher, not easily there are electric discharge phenomena, effectively prevent the sintering of lower terminal and breakdown problem.
From table 1, the sulfur hexafluoride loading switch being provided with hydrophobic coating considerably increases the moisture resistance of equipment.
In addition, described hydrophobic coating can improve the pollution flashover voltage of equipment simultaneously, and reference table 2, table 2 is artificial pollution flashover performance test results under wet deposition.
From the experimental data in table 2 below, the lower terminal with common RTV silicone rubber coating makes pollution layer also have hydrophobicity due to the hydrophobicity migration of coating, the water droplet on surface is disconnected from each other, form discontinuous moisture film, be significantly less than the uncoated lower terminal under equal pollution degree along face Leakage Current, pollution flashover voltage is higher; And the lower terminal surface water droplet being coated with super-hydrophobic RTV silicone rubber coating more easily tumbles, its pollution flashover voltage is higher.In addition, because filth is easily taken away by water droplet, this is for minimizing lower terminal surface laying dust, and the pollution flashover voltage improving equipment is also very important effect.Higher pollution flashover voltage can reduce the sintering of lower terminal and the generation of breakdown probability further.
Table 2
From table 2 above, the pollution flashover voltage of equipment can also be improved by hydrophobic coating.
Known by the test result of above-mentioned table 1 and table 2, by arranging hydrophobic coating on the surface of described lower terminal, ponding and the laying dust problem of equipment can be avoided, and then improve the flashover voltage of power frequency wet flashover and the flashover voltage of pollution flashover network of equipment, the equipment that effectively prevent to discharge the sintering of the lower terminal caused or even the generation of breakdown problem due to flashover.
With reference to figure 2, the embodiment of the present application provides another kind of sulfur hexafluoride loading switch, differently from Fig. 1 illustrated embodiment is: be provided with in the lower end of lower terminal and increase creep distance skirt 7.
With reference to figure 3, described increase creep distance skirt 7 is corrosion resistant insulation shell, comprising: the first housing 71 and the second housing 72 be oppositely arranged.In the present embodiment, described insulation shell is silicone rubber housings.
Wherein, described first housing 71 and the second housing 72 are formed in one structure.Described first housing 71 is for surrounding described lower terminal 4.The A/F L of described second housing 72 is increased gradually by the direction deviating from described first housing.The public bottom surface of described first housing 71 and the second housing 72 is provided with the opening 73 of the wiring pile 6 of lower terminal.
General, the wiring pile of the lower terminal of sulphur hexafluoride needs a longer metallic gasket when connecting fuse, for the ease of the installation of described metallic gasket, the side increasing creep distance skirt 7 described in the present embodiment is also provided with the side opening 74 of the metallic gasket at the wiring pile place for drawing described lower terminal.
General, hydrophobic coating can be used for the fixing liquid-containing binder that bonds, and forms hydrophobic coating after fixing.Therefore, directly described increase creep distance skirt 7 can be bonded and fixed at described lower terminal 4 lower end when described lower terminal 4 surface-coated hydrophobic coating, also can adopt separately waterproof seal binding agent that described increase creep distance skirt 7 is bonded and fixed at described lower terminal 4 lower end.
In order to make the first housing 71 and described lower terminal 4 close contact, the A/F of described first housing 71 is less than the width of lower terminal 4, when described first housing 71 is fixed with described lower terminal, described first housing 71 is heated, make it expand, increase its A/F, after itself and lower terminal 4 being bondd by binding agent, make adhesive cures, cool described first housing 71 simultaneously and make it be fixed on the lower end of described lower terminal 4 closely.
By arranging described increase creep distance skirt 7, the ponding on lower terminal top can by the outer surface landing of described increase creep distance skirt 7 sidewall, and the wiring pile 6 of moisture and lower terminal 4 is isolated by described increase creep distance skirt 7 sidewall, prevents the flashover problem that this portion of water causes.The A/F of the second housing 72 is increased gradually by the direction deviating from described first housing, like this, distance between the ponding and the wiring pile 6 of lower terminal 4 of the inner surface of the second housing 72 sidewall increases gradually, and increase creep distance (retting-flax wastewater), what can effectively prevent flashover from discharging frees.
Reset lower terminal to increase the mode of creep distance, need the lower terminal of sulfur hexafluoride loading switch in a large amount of replacing electric power systems, cost is higher, and the lower terminal changed cannot recycle, and causes great waste.Meanwhile, the lower terminal length of large distance is comparatively large, can not ensure safer distance to the ground.
And Fig. 2 illustrated embodiment, only need can be increased the creep distance of lower terminal by price increase creep distance skirt inexpensively, without the need to changing lower terminal, cost is lower, and can not reduce lower terminal distance to the ground.、
Known by foregoing description, sulfur hexafluoride loading switch described in the embodiment of the present application effectively can prevent the flashover electric discharge problem of equipment by described hydrophobic layer and increase creep distance skirt, ensure that the fail safe of power supply unit.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.The verb mentioned in application documents " comprises ", those elements except recording in application documents are not got rid of in " comprising " and paradigmatic use thereof or the existence of element except step or step.Article "a" or "an" before element does not get rid of the existence of multiple this element.
Although describe spirit of the present invention and principle with reference to some embodiments, but should be appreciated that, the present invention is not limited to disclosed embodiment, can not combine to be benefited to the feature that the division of each side does not mean that in these aspects yet, this division is only the convenience in order to state.The present invention is intended to contain the interior included various amendment of spirit and scope and the equivalent arrangements of claims.The scope of claims meets the most wide in range explanation, thus comprises all such amendments and equivalent structure and function.
Claims (6)
1. a sulfur hexafluoride loading switch, is characterized in that, comprising:
The upper insulating lid be oppositely arranged and lower insulating lid;
Be arranged on the upper terminal that described upper insulating lid deviates from described lower insulating lid side;
Be arranged on the lower terminal that described lower insulating lid deviates from described upper insulating lid side, is oppositely arranged with described upper terminal;
Be arranged on the increase creep distance skirt in described lower terminal, described increase creep distance skirt comprises: the first housing be oppositely arranged and the second housing;
Wherein, the surface of described lower terminal is provided with hydrophobic coating;
Described first housing is for surrounding described lower terminal; The A/F of described second housing is increased gradually by the direction deviating from described first housing; The public bottom surface of described first housing and the second housing is provided with the opening of the wiring pile of lower terminal.
2. sulfur hexafluoride loading switch according to claim 1, is characterized in that, described hydrophobic coating is super-hydrophobic RTV silicone rubber coating.
3. sulfur hexafluoride loading switch according to claim 1, is characterized in that, the side of described second housing is provided with side opening, and described side opening is for drawing the metallic gasket at the wiring pile place of described lower terminal.
4. the sulfur hexafluoride loading switch according to claim 1 or 3, is characterized in that, described increase creep distance skirt is that silicon rubber increases creep distance skirt.
5. sulfur hexafluoride loading switch according to claim 1, is characterized in that, described sulfur hexafluoride loading switch comprises: 3 upper terminals and 3 lower terminal, described upper terminal and described lower terminal one_to_one corresponding.
6. sulfur hexafluoride loading switch according to claim 1, is characterized in that, described upper terminal is epoxy resin insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310634282.6A CN103594278B (en) | 2013-11-29 | 2013-11-29 | A kind of sulfur hexafluoride loading switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310634282.6A CN103594278B (en) | 2013-11-29 | 2013-11-29 | A kind of sulfur hexafluoride loading switch |
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| Publication Number | Publication Date |
|---|---|
| CN103594278A CN103594278A (en) | 2014-02-19 |
| CN103594278B true CN103594278B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310634282.6A Active CN103594278B (en) | 2013-11-29 | 2013-11-29 | A kind of sulfur hexafluoride loading switch |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111009442A (en) * | 2019-12-26 | 2020-04-14 | 宁波索立安电气有限公司 | Advanced 36kV sulfur hexafluoride gas insulation load switch insulation shell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2471925A (en) * | 2009-07-15 | 2011-01-19 | Lucy And Co Ltd W | Electrical switchgear |
| CN201741622U (en) * | 2010-05-18 | 2011-02-09 | 武汉西高电器有限公司 | Sulfur hexafluoride load switch housing |
| CN102290782A (en) * | 2011-08-16 | 2011-12-21 | 武汉百楚科技有限公司 | Permanent magnet vacuum switch on intelligent pole |
| CN203573895U (en) * | 2013-11-29 | 2014-04-30 | 国家电网公司 | Sulfur hexafluoride load switch |
-
2013
- 2013-11-29 CN CN201310634282.6A patent/CN103594278B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2471925A (en) * | 2009-07-15 | 2011-01-19 | Lucy And Co Ltd W | Electrical switchgear |
| CN201741622U (en) * | 2010-05-18 | 2011-02-09 | 武汉西高电器有限公司 | Sulfur hexafluoride load switch housing |
| CN102290782A (en) * | 2011-08-16 | 2011-12-21 | 武汉百楚科技有限公司 | Permanent magnet vacuum switch on intelligent pole |
| CN203573895U (en) * | 2013-11-29 | 2014-04-30 | 国家电网公司 | Sulfur hexafluoride load switch |
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| CN103594278A (en) | 2014-02-19 |
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