CN102801115B - Static seal structure between SMC1 gas-insulated switch two kinds of unlike materials - Google Patents
Static seal structure between SMC1 gas-insulated switch two kinds of unlike materials Download PDFInfo
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- CN102801115B CN102801115B CN201210276406.3A CN201210276406A CN102801115B CN 102801115 B CN102801115 B CN 102801115B CN 201210276406 A CN201210276406 A CN 201210276406A CN 102801115 B CN102801115 B CN 102801115B
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Abstract
The invention discloses static seal structure between a kind of SMC1 gas-insulated switch two kinds of unlike materials, comprise the gas bag housing of epoxy resin material and the translucent cover of Merlon material, gas bag housing is provided with seal groove, be provided with sealing ring in seal groove, the sealing surface of translucent cover lower surface is pressed on sealing ring; The flatness of the sealing surface bottom seal groove is not more than 0.25mm, plane roughness is Ra3.2 ~ 6.3 μm, and the flatness of the sealing surface of translucent cover lower surface is not more than 0.15mm, plane roughness is Ra3.2.Have visual fracture, have good sealing again, empirical tests, good airproof performance, leakage rate per year is less than 0.5 ‰.
Description
Technical field
The present invention relates to a kind of SMC1 gas-insulated switch, particularly relate to static seal structure between a kind of SMC1 gas-insulated switch two kinds of unlike materials.
Background technology
SMC1 gas-insulated switch (SF6 on-load switch) is a kind of to be integrated on-load switch, isolating switch, earthed switch, be sealed in a casing being full of SF6 gas, utilize the insulation of SF6 excellence, arc extinction performance, meet close, isolate, the switchgear of ground connection three station function.At present, the external SF6 on-load switch produced of the same trade such as ABB, Schneider is all switches of epoxy resin integral type.
The split type SF6 on-load switch of one of the prior art, adopt the structure of gas bag housing and translucent cover split, isolation fracture is visual.The shortcoming of this Split switch is: leak gas between the gas bag housing of this kind of on-load switch and translucent cover serious,
Summary of the invention
The object of this invention is to provide a kind of there is visual fracture, static seal structure between SMC1 gas-insulated switch two kinds of unlike materials of having again good sealing.
The object of the invention is to be achieved through the following technical solutions:
Static seal structure between SMC1 gas-insulated switch of the present invention two kinds of unlike materials, comprise the gas bag housing of epoxy resin material and the translucent cover of Merlon material, described gas bag housing is provided with seal groove, be provided with sealing ring in described seal groove, the sealing surface of described translucent cover lower surface is pressed on described sealing ring;
The flatness of the sealing surface bottom described seal groove is not more than 0.25mm, plane roughness is Ra3.2 ~ 6.3 μm, and the flatness of the sealing surface of described translucent cover lower surface is not more than 0.15mm, plane roughness is Ra3.2.
As seen from the above technical solution provided by the invention, static seal structure between SMC1 gas-insulated switch provided by the invention two kinds of unlike materials, comprise the gas bag housing of epoxy resin material and the translucent cover of Merlon material, gas bag housing is provided with seal groove, be provided with sealing ring in seal groove, the sealing surface of translucent cover lower surface is pressed on sealing ring; The flatness of the sealing surface bottom seal groove is not more than 0.25mm, plane roughness is Ra3.2 ~ 6.3 μm, and the flatness of the sealing surface of translucent cover lower surface is not more than 0.15mm, plane roughness is Ra3.2.Have visual fracture, have good sealing again, empirical tests, good airproof performance, leakage rate per year is less than 0.5 ‰, well below the leak rate requirement of national standard 5 ﹪.
Accompanying drawing explanation
Fig. 1 is the structural representation of the gas bag housing of embodiment of the present invention epoxy resin material;
Fig. 2 is the structural representation of the translucent cover of Merlon material in the embodiment of the present invention.
In figure: 1, gas bag housing, 2, seal groove, 3, translucent cover.
Embodiment
To be described in further detail the embodiment of the present invention below.
Static seal structure between SMC1 gas-insulated switch of the present invention two kinds of unlike materials, its preferably embodiment be:
Comprise the gas bag housing of epoxy resin material and the translucent cover of Merlon material, described gas bag housing is provided with seal groove, is provided with sealing ring in described seal groove, and the sealing surface of described translucent cover lower surface is pressed on described sealing ring;
The flatness of the sealing surface bottom described seal groove is not more than 0.25mm, plane roughness is Ra3.2 ~ 6.3 μm, and the flatness of the sealing surface of described translucent cover lower surface is not more than 0.15mm, plane roughness is Ra3.2.
Described sealing ring is Ethylene Propylene Terpolymer O RunddichtringO.
Stop-leak compound is filled with between described gas bag housing and the sealing surface of translucent cover.
Described stop-leak compound is the high vacuum seal fat of VyboryZK530 series.
Regulate its linear expansion rate by the amount adding silicon powder and/or coloring agent in adjustment ring epoxy resins, make it consistent with the linear expansion rate of described Merlon.
Investigate discovery through applicant, serious problem of leaking gas between the gas bag housing of on-load switch of the prior art and translucent cover goes out in the sealing using transparent material and gas bag case material.Applicant has carefully studied the Sealing Technology between bi-material, through the effort of 2 years, finally develops and has visual fracture, have again good sealing, and other every electric parameters all meet again the SF6 on-load switch of national standard simultaneously.
In the present invention, SF6 on-load switch adopts the gas bag housing of epoxy resin material and the translucent cover of Merlon material, and epoxy resin and Merlon bi-material are combined closely by O RunddichtringO, have the hermetically-sealed construction that leak rate is extremely low.Empirical tests, good airproof performance, leakage rate per year is less than 0.5 ‰, well below the leak rate requirement of national standard 5 ﹪.
SMC1 type SF6 on-load switch in the present invention is by the static seal mode of employing two kinds of unlike materials, except there is the advantage of common SF6 on-load switch, also have oneself original characteristic, isolation fracture is visual, and its advantage is in the process of equipment operation, the running status of gas bag inside can be seen at any time, the exception of contact during timely observation divide-shut brake, effectively can avoid the generation of accident, make operating personnel safer, duration of service is improved greatly, and stability is better.
Below the epoxy resin in the present invention and Merlon bi-material are made an explanation:
Epoxy resin:
Epoxy resin is the organic high molecular compound containing two or more epoxide groups in general reference molecule, and except indivedual, their relative molecular mass is not high.The molecular structure of epoxy resin be with in strand containing active epoxide group for its feature, epoxide group can be positioned at the end of strand, centre or structure circlewise.Due in molecular structure containing active epoxide group, make they can with polytype curing agent generation cross-linking reaction and formed and insoluble, not molten there is the cancellated high polymer of three-dimensional.
The performance of epoxy resin and characteristic:
1, various informative.Various resin, curing agent, modifier system almost can adapt to various application to form requirement, and its scope can from extremely low viscosity to high melting solid.
2, solidification is convenient.Select various different curing agent, epoxy-resin systems almost can solidify in 0 ~ 180 DEG C of temperature range.
3, adhesion is strong.Polar hydroxyl groups intrinsic in epoxy molecule chain and the existence of ehter bond, make it have very high adhesion to various material.Shrinkage during epoxy resin cure is low, and the internal stress of generation is little, and this also contributes to improving adhesion strength.
4, shrinkage is low.The reaction of epoxy resin and curing agent used is undertaken by the ring-opening polymerization of direct addition reaction or molecular resin epoxy group, do not have water or other volatile byproducts to release.They are compared with unsaturated polyester resin, phenolic resins, demonstrate very low shrinkage (being less than 2%) in the curing process.
5, mechanical property.Epoxy-resin systems after solidification has excellent mechanical property.
6, electrical property.Epoxy-resin systems after solidification is a kind of superior isolation material with high dielectric property, resistance to surface leakage, resistance to electric arc.
7, chemical stability.Usually, the epoxy-resin systems after solidification has excellent alkali resistance, acid resistance and solvent resistance.As other performance of cured epoxy system, chemical stability also depends on selected resin and curing agent.Suitably select epoxy resin and curing agent, special chemical stability can be made it have.
8, dimensional stability.Above-mentioned many performances comprehensive, makes epoxy-resin systems have outstanding dimensional stability and durability.
Merlon:
Merlon water white transparency, heat-resisting, shock resistance, fire-retardant BI level, has good mechanical performance in common serviceability temperature.Compare close to polymethyl methacrylate with performance, the impact resistance of Merlon is good, and refractive index is high, good processability, does not need additive just to have UL94V-0 level fire resistance.Method by polymerisation in bulk produces large-scale device.Merlon has good and constant electrical insulating property, good flame retardancy and dimensional stability within the scope of wider epidemic disaster.
Specific embodiment:
As shown in Figure 1, the seal face flatness of epoxy resin housing is not more than 0.25mm, and plane roughness can not be too smooth, the most favourable to air-tightness in Ra3.2 ~ 6.3 μm.
As shown in Figure 2, Merlon seal cover end face plane degree is not more than 0.15mm, and roughness is set in Ra3.2.
Reasonably select sealing ring, through consulting reference materials and lot of experiments, Ethylene Propylene Terpolymer O RunddichtringO is best selection, the resistance to SF6 of ethylene propylene diene rubber itself, and its any surface finish is attractive in appearance, has good elasticity and incompressible distortion, the excellent properties such as Weather-resistant, resistance to ozone, chemically-resistant effect and wider serviceability temperature scope (-40 DEG C ~+120 DEG C), uniform in foaming, water resistance is first-class, and solvent resistance is all good.
Between the sealing surface of epoxy resin housing and polycarbonate transparent cover except Ethylene Propylene Terpolymer sealing ring, also need the stop-leak compound of filling air gap, this fat need be applicable to the running environment of on-load switch, can withstand high temperatures 100 DEG C, the environmental condition of low temperature-40 DEG C, for this reason, the high vacuum seal fat of the VyboryZK530 series that applicant has selected volatility extremely low, its feature is:
Excellent high temperature performance, good resistance to pressure, does not solidify, does not dissolve, does not disperse; Splendid sealing, adhesiveness and lubrification, extremely low volatilization loss; Excellent water repelling property, electrical insulation capability and chemical stability, nontoxic, tasteless, resistance to ozone, weather-resistant; Adaptability for materials is strong, serviceability temperature wide ranges, Applicable temperature scope :-40 ~+200 DEG C.
Except above except some, the linear expansion rate of different materials has to consider, the chances are 5 × 10 for epoxy resin
-5k
-1, the linear expansion rate of Merlon is 7.2 × 10
-5k
-1, according to contrast number, both, at a distance of little, added the content of silicon powder, coloring agent etc., linear adjustment expansion rate, make it to reach best effects by adjustment ring epoxy resins.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (2)
1. static seal structure between a SMC1 gas-insulated switch two kinds of unlike materials, it is characterized in that, comprise the gas bag housing of epoxy resin material and the translucent cover of Merlon material, described gas bag housing is provided with seal groove, be provided with sealing ring in described seal groove, the sealing surface of described translucent cover lower surface is pressed on described sealing ring;
The flatness of the sealing surface bottom described seal groove is not more than 0.25mm, plane roughness is Ra3.2 ~ 6.3 μm, and the flatness of the sealing surface of described translucent cover lower surface is not more than 0.15mm, plane roughness is Ra3.2;
Described sealing ring is Ethylene Propylene Terpolymer O RunddichtringO;
Stop-leak compound is filled with between described gas bag housing and the sealing surface of translucent cover;
Regulate its linear expansion rate by the amount adding silicon powder and/or coloring agent in adjustment ring epoxy resins, make it consistent with the linear expansion rate of described Merlon.
2. static seal structure between SMC1 gas-insulated switch according to claim 1 two kinds of unlike materials, is characterized in that, described stop-leak compound is the high vacuum seal fat of VyboryZK530 series.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210276406.3A CN102801115B (en) | 2012-08-03 | 2012-08-03 | Static seal structure between SMC1 gas-insulated switch two kinds of unlike materials |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210276406.3A CN102801115B (en) | 2012-08-03 | 2012-08-03 | Static seal structure between SMC1 gas-insulated switch two kinds of unlike materials |
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| CN102801115A CN102801115A (en) | 2012-11-28 |
| CN102801115B true CN102801115B (en) | 2016-04-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201766016U (en) * | 2010-09-06 | 2011-03-16 | 北京合纵科技股份有限公司 | Gas isolation load switch casing and load switch employing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6115929B2 (en) * | 2009-04-07 | 2017-04-19 | 株式会社スリーボンド | Epoxy resin composition |
| CN101880515A (en) * | 2010-06-28 | 2010-11-10 | 深圳市库泰克电子材料技术有限公司 | High-reliability and low-viscosity underfill |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201766016U (en) * | 2010-09-06 | 2011-03-16 | 北京合纵科技股份有限公司 | Gas isolation load switch casing and load switch employing the same |
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Effective date of registration: 20160308 Address after: 300301 Binhai hi tech Zone, Binhai New Area, Tianjin, 10 Tai Tay Road Applicant after: TIANJIN HEZONG POWER EQUIPMENT CO., LTD. Address before: 100085 Jiahua building, 3rd Street, Beijing, Haidian District, D1211 Applicant before: Beijing Hezong Kolwell Power Science & Technology Co., Ltd. |
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