SMC1 high-pressure load switch

Abstract

The invention discloses a SMC1 pressure gage position and sealing structure. A pressure gage is mounted on a grounded part at top left corner of an epoxy resin air bag shell; a connector part of the pressure gage is made of copper; an outer diameter of a gage rod of the pressure gage is more than or equal to 12mm; an aperture of an air hole in the gage rod is less than or equal to 3mm; and a radial sealing slot and an axial sealing slot are arranged on the connector part of the pressure gage. The copper taken as the raw material and epoxy resin have similar swelling coefficients and the grounded part is at the top left corner, so that the discharging with the outside through a copper conductor is avoided; the pressure gage has the thick gage rod and the fine air hole, so that air is prevented from leaking from the gage rod; and the sealing effect is excellent due to the radial sealing slot and the axial sealing slot.

Description

technical field [0001] The invention relates to an SMC1 high-voltage load switch, in particular to a position and sealing structure of an SMC1 pressure gauge. Background technique [0002] SMC1 high-voltage load switch (SF6 load switch) is a load switch, isolating switch, and grounding switch, and is sealed in a box (gas bag) filled with SF6 gas. Using the excellent insulation and arc extinguishing performance of SF6, A switchgear that satisfies the three-position functions of closing, isolating, and grounding. The gas bag includes an epoxy resin gas bag shell and a polycarbonate transparent cover, which requires a good seal. [0003] Pressure gauge (density gauge), with elastic element as the sensitive element, is used to measure and indicate the instrument of pressure higher than the environment, pressure gauge (density gauge). The SF6 load switch is equipped with a density meter with excellent sealing performance and accurate measurement, which can make the SF6 load swi...

AI Technical Summary

Problems solved by technology

[0006] The meter stem is fixed on the polycarbonate transparent cover, and the sealing effect is poor; the meter stem is thin and needs a lot of bending, which is easy to leak; there are many sealed interfaces, which greatly increases the possibility of air leakage; and it is inconvenient to replace the meter, and the meter stem And the meter needs special processing, and the processing cost is higher than the general meter cost, which is not economical

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