CN203573895U - Sulfur hexafluoride load switch - Google Patents
Sulfur hexafluoride load switch Download PDFInfo
- Publication number
- CN203573895U CN203573895U CN201320775948.5U CN201320775948U CN203573895U CN 203573895 U CN203573895 U CN 203573895U CN 201320775948 U CN201320775948 U CN 201320775948U CN 203573895 U CN203573895 U CN 203573895U
- Authority
- CN
- China
- Prior art keywords
- lower terminal
- sulfur hexafluoride
- terminal
- housing
- loading switch
- Prior art date
- 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.)
- Expired - Lifetime
Links
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 44
- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 43
- 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
- GQWNECFJGBQMBO-UHFFFAOYSA-N Molindone hydrochloride Chemical compound Cl.O=C1C=2C(CC)=C(C)NC=2CCC1CN1CCOCC1 GQWNECFJGBQMBO-UHFFFAOYSA-N 0.000 claims description 7
- 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 9
- 230000005661 hydrophobic surface Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 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
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 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
- 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
- 238000007789 sealing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Insulators (AREA)
Abstract
The utility model discloses a sulfur hexafluoride load switch. The sulfur hexafluoride load switch comprises an upper insulating cover and a lower insulating cover, an upper terminal, and a lower terminal. The upper insulating cover and the lower insulating cover are oppositely arranged. The upper terminal is arranged on one side, which is away from the lower insulating cover, of the upper insulating cover. The lower terminal is arranged on one side, which is away from the upper insulating cover, of the lower insulating cover and is opposite to the upper terminal. A hydrophobic coating is arranged on the surface of the lower terminal. A super hydrophobic RTV silicone rubber coating on the surface of the lower terminal of the sulfur hexafluoride load switch has a hydrophobic surface and is not easy to form a water film. When the surface is affected with damp, vapor forms water drops to slide down. Only a few of tiny water drops are attached on the surface of the super hydrophobic RTV silicone rubber coating and are easily taken away by other water drops sliding down. Water accumulating is avoided on the surface, thus leakage current is avoided. A discharge phenomenon is avoided, thus the safety is high.
Description
Technical field
The utility model relates to switchgear technical field, more particularly, relates 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 can, for folding and switch load electric current and overload current, can also and cut-off nonloaded line, no-load transformer and capacitor group for folding.
Sulfur hexafluoride loading switch consists of the upper insulating lid being oppositely arranged and lower insulating lid, and portion is provided with sulfur hexafluoride gas within it, on 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 the surface ponding that easily makes moist, causes the surface of lower terminal to be prone to electric discharge phenomena, causes fail safe low.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of sulfur hexafluoride loading switch, and described sulfur hexafluoride loading switch has been avoided the ponding problem of making moist of lower terminal, safe.
For achieving the above object, the utility model provides following technical scheme:
A sulfur hexafluoride loading switch, this sulfur hexafluoride loading switch comprises:
The upper insulating lid being oppositely arranged and lower insulating lid;
Be arranged on the upper terminal that described upper insulating lid deviates from described lower insulating lid one side;
Be arranged on the lower terminal that described lower insulating lid deviates from described upper insulating lid one 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 being oppositely arranged and the second housing;
Wherein, described the first housing is used for surrounding described lower terminal; The A/F of described the second housing is increased gradually by the direction that deviates from described the first housing; The public bottom surface of described the 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 the 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 is corresponding one by one with described lower terminal.
Preferably, in above-mentioned sulfur hexafluoride loading switch, described upper terminal is epoxy resin insulator.
From technique scheme, can find out, sulfur hexafluoride loading switch provided by the utility model comprises: the upper insulating lid being oppositely arranged and lower insulating lid; Be arranged on the upper terminal that described upper insulating lid deviates from described lower insulating lid one side; Be arranged on the lower terminal that described lower insulating lid deviates from described upper insulating lid one 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 surperficial super-hydrophobic RTV silicone rubber coating of the lower terminal of described sulfur hexafluoride loading switch has hydrophobic surface and is difficult for forming moisture film, the globule landing that during surface wetting, steam can form, only have the minimum water droplet of only a few to be attached to super-hydrophobic RTV silicone rubber coating surface, and easily by the globule of other landings, taken away, surface is difficult for ponding, so be difficult to produce Leakage Current, be difficult for Discharge Phenomena, safe.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of a kind of sulfur hexafluoride loading switch that Fig. 1 provides for the utility model embodiment;
The structural representation of the another kind of sulfur hexafluoride loading switch that Fig. 2 provides for the utility model embodiment;
A kind of structural representation that increases creep distance skirt that Fig. 3 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Just as described in the background section, the lower terminal of sulfur hexafluoride loading switch is concave structure, and the surface ponding that easily makes moist, causes the surface of lower terminal to be prone to electric discharge phenomena, causes fail safe low.
Because lower terminal is concave structure, air flow property is poor, is subject to the time of tide; the easy ponding of insulator surface of lower terminal; at insulator surface, form moisture film, under the effect of electric field, Leakage Current raises along with the rising of voltage, is easy to form current loop; thereby cause flashover; there are electric discharge phenomena, cause the surperficial sintering of insulator, when serious, even can puncture insulator; cause leakage of sulfur hexafluoride gas, cause the security incident of power-off and crisis personal safety.
For addressing the above 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 being oppositely arranged and lower insulating lid 2; The upper terminal 3 that described upper insulating lid 1 deviates from described lower insulating lid 2 one sides is set; Be arranged on the lower terminal 4 that described lower insulating lid 2 deviates from described upper insulating lid one 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 of described lower terminal 4 (removing the insulator surface outside wiring pile 6) is provided with hydrophobic coating.Ponding when hydrophobic coating can reduce lower terminal surface wetting.Described hydrophobic coating can be common RTV silicone rubber coating, can be also 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 Fig. 2 illustrated embodiment, described sulfur hexafluoride loading switch is provided with 3 upper terminals and 3 lower terminal, and described upper terminal is corresponding one by one with described lower terminal.The insulator of described upper terminal and lower terminal is the epoxy resin insulator with good electrical insulating property.
The wet Power Flashover Voltage of lower terminal below by contrast test explanation during without coating, while having common RTV silicone rubber coating and while having super-hydrophobic RTV silicone rubber coating, reference table 1, wet during for the different coating result of the test of Power Flashover Voltage of table 1:
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 of lower terminal that has applied super-hydrophobic RTV silicone rubber coating is owing to applying the lower terminal of common RTV silicone rubber coating.
This be 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, thereby causes flashover, discharges.
And the lower terminal that has applied common RTV silicone rubber coating can only form mutual disjunct droplet because its hydrophobic surface is difficult to form moisture film, increase along with the globule, the globule can be dirty along surface under the effect of gravity, can only form interrupted thread water route, thereby cause less leakage voltage, and then can obtain higher flashover voltage.
In like manner, applied the lower terminal of super-hydrophobic RTV silicone rubber coating, because the surface water drops roll angle of super-hydrophobic RTV silicone rubber coating is 8 °-10 ° (much smaller than 60 ° of-80 ° of globule roll angles of common hydrophobic coating), the globule forming is easy to landing on its surface, surface is difficult for forming the current loop that moisture film causes, so can effectively prevent the generation of surperficial Leakage Current, there is very high wet flash-over voltage, high wet flash-over voltage makes the threshold voltage of surface discharge higher, be difficult for occurring electric discharge phenomena, the sintering of lower terminal and breakdown problem have effectively been avoided.
From table 1, the sulfur hexafluoride loading switch that is provided with hydrophobic coating has increased the moisture resistance of equipment greatly.
In addition, described hydrophobic coating can improve the pollution flashover voltage of equipment simultaneously, reference table 2, and table 2 is artificial pollution flashover performance test results under wet deposition.
Known by the experimental data in table 2 below, the lower terminal with common RTV silicone rubber coating is because the hydrophobicity migration of coating makes pollution layer also have hydrophobicity, the water droplet on surface is disconnected from each other, form discontinuous moisture film, along face Leakage Current, be significantly less than the uncoated lower terminal under equal filthy degree, pollution flashover voltage is higher; And the lower terminal surface water droplet that is 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 reducing lower terminal surface laying dust, and the pollution flashover voltage that improves equipment is also very important effect.Higher pollution flashover voltage can further reduce the sintering of lower terminal and the generation of breakdown probability.
Table 2
From table 2 above, by hydrophobic coating, can also improve the pollution flashover voltage of equipment.
Test result by above-mentioned table 1 and table 2 is known, by the surface in described lower terminal, hydrophobic coating is set, can avoid ponding and the laying dust problem of equipment, and then the flashover voltage of power frequency wet flashover and the flashover voltage of pollution flashover network of equipment have been improved, the generation of the sintering of the lower terminal that the equipment that effectively prevented causes due to flashover electric discharge or even breakdown problem.
With reference to figure 2, the embodiment of the present application provides another kind of sulfur hexafluoride loading switch, be different from Fig. 1 illustrated embodiment: in the lower end of lower terminal, be provided with 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 being oppositely arranged and the second housing 72.In the present embodiment, described insulation shell is silicone rubber housings.
Wherein, described the first housing 71 and the second housing 72 structure that is formed in one.Described the first housing 71 is for surrounding described lower terminal 4.The A/F L of described the second housing 72 is increased gradually by the direction that deviates from described the first housing.The public bottom surface of described the first housing 71 and the second housing 72 is provided with the opening 73 of the wiring pile 6 of lower terminal.
General, when connecting fuse, the wiring pile of the lower terminal of sulphur hexafluoride needs a longer metallic gasket, for the ease of the installation of described metallic gasket, the side that increases creep distance skirt 7 described in the present embodiment is also provided with for drawing the side opening 74 of metallic gasket at the wiring pile place of described lower terminal.
General, hydrophobic coating can be used for the fixing liquid-containing binder that bonds, the fixing rear hydrophobic coating that forms.Therefore, can when described lower terminal 4 surface-coated hydrophobic coating, directly described increase creep distance skirt 7 be bonded and fixed to described lower terminal 4 lower ends, also can adopt separately the agent of waterproof sealing cohesive that described increase creep distance skirt 7 is bonded and fixed to described lower terminal 4 lower ends.
In order to make the first housing 71 and described lower terminal 4 close contacts, the A/F of described the first housing 71 is less than the width of lower terminal 4, by described the first housing 71 with described lower terminal fixedly time, described the first housing 71 is heated, it is expanded, increase its A/F, after itself and lower terminal 4 being bondd by binding agent, make adhesive cures, cooling described the first housing 71 makes it be fixed on closely the lower end of described lower terminal 4 simultaneously.
By described increase creep distance skirt 7 is set, the ponding on lower terminal top can be by the outer surface landing of described increase creep distance skirt 7 sidewalls, and the wiring pile 6 of moisture and lower terminal 4 is isolated by described increase creep distance skirt 7 sidewalls, prevents the flashover problem that this part moisture causes.The A/F of the second housing 72 is increased gradually by the direction that deviates from described the first housing, like this, at the ponding of inner surface of the second housing 72 sidewalls and the distance between the wiring pile 6 of lower terminal 4, increase gradually, increased creep distance (creepage than distance), can effectively prevent freeing of flashover electric discharge.
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 changing cannot recycle, and causes great waste.Meanwhile, the lower terminal length of large distance is larger, can not guarantee safer distance to the ground.
And Fig. 2 illustrated embodiment only need can increase by a comparatively cheap increase creep distance skirt of price the creep distance of lower terminal, without changing lower terminal, cost is lower, and can not reduce lower terminal distance to the ground.、
Known by foregoing description, sulfur hexafluoride loading switch can effectively prevent the flashover electric discharge problem of equipment by described hydrophobic layer and increase creep distance skirt described in the embodiment of the present application, has guaranteed the fail safe of power supply unit.
It should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.The verb of mentioning in application documents " comprises ", those elements or the element step or the existence of step of recording in application documents do not got rid of in " comprising " and paradigmatic use thereof.Article before element " one " or " one " do not get rid of the existence of a plurality of this elements.
Although described spirit of the present utility model and principle with reference to some embodiments, but should be appreciated that, the utility model is not limited to disclosed embodiment, the division of each side is not meant that to the feature in these aspects can not combine to be benefited yet, and this division is only the convenience in order to explain.The utility model is intended to contain interior included various modifications and the equivalent arrangements of spirit and scope of claims.The scope of claims meets the most wide in range explanation, thereby comprises all such modifications and equivalent structure and function.
Claims (7)
1. a sulfur hexafluoride loading switch, is characterized in that, comprising:
The upper insulating lid being oppositely arranged and lower insulating lid;
Be arranged on the upper terminal that described upper insulating lid deviates from described lower insulating lid one side;
Be arranged on the lower terminal that described lower insulating lid deviates from described upper insulating lid one side, is oppositely arranged with described upper terminal;
Wherein, the surface of described lower terminal is provided with hydrophobic coating.
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 2, is characterized in that, also comprises:
Be arranged on the increase creep distance skirt in described lower terminal, described increase creep distance skirt comprises: the first housing being oppositely arranged and the second housing;
Wherein, described the first housing is used for surrounding described lower terminal; The A/F of described the second housing is increased gradually by the direction that deviates from described the first housing; The public bottom surface of described the first housing and the second housing is provided with the opening of the wiring pile of lower terminal.
4. sulfur hexafluoride loading switch according to claim 3, is characterized in that, the side of described the 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.
5. according to the sulfur hexafluoride loading switch described in claim 3 or 4, it is characterized in that, described increase creep distance skirt is that silicon rubber increases creep distance skirt.
6. 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 is corresponding one by one with described lower terminal.
7. 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 |
|---|---|---|---|
| CN201320775948.5U CN203573895U (en) | 2013-11-29 | 2013-11-29 | Sulfur hexafluoride load switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320775948.5U CN203573895U (en) | 2013-11-29 | 2013-11-29 | Sulfur hexafluoride load switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203573895U true CN203573895U (en) | 2014-04-30 |
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ID=50541610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320775948.5U Expired - Lifetime CN203573895U (en) | 2013-11-29 | 2013-11-29 | Sulfur hexafluoride load switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203573895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594278A (en) * | 2013-11-29 | 2014-02-19 | 国家电网公司 | Sulfur-hexafluoride load switch |
-
2013
- 2013-11-29 CN CN201320775948.5U patent/CN203573895U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594278A (en) * | 2013-11-29 | 2014-02-19 | 国家电网公司 | Sulfur-hexafluoride load switch |
| CN103594278B (en) * | 2013-11-29 | 2016-01-20 | 国家电网公司 | A kind of sulfur hexafluoride loading switch |
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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 |
Granted publication date: 20140430 Effective date of abandoning: 20160120 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |