Absolute pressure type gas-density relay

Abstract

The invention discloses an absolute pressure type gas-density relay without being influenced by altitude or atmospheric pressure, comprising a shell and a outlet, wherein the opening end of the shell is provided with a meter cover in a covering manner; and a cavity of the meter cover is internally provided with an observation window, supporting pieces, upper sealing pieces and lower sealing pieces. Sealing transition pieces with the wall thickness being larger than that of the shell are arranged between the opening end surfaces of the shell and the lower ends of the supporting pieces in a sealing manner; the upper sealing pieces are arranged between the supporting pieces and the observation window by an upper limiting mechanism; the lower sealing pieces are arranged between the sealing transition pieces and the supporting pieces by a lower limiting mechanism; and the meter cover presses the observation window, the upper sealing pieces, the supporting pieces and the lower sealing pieces on the sealing transition pieces. A cavity of the outlet is internally provided with a plurality of inner and outer leading-out wires, conducting pieces and sealing pieces, and the inner and outer leading-out wires are connected with the inner ends and the outer ends of the conducting pieces. The conducting pieces are partially or wholly embedded in holes of the sealing pieces, and the conducting pieces and the sealing pieces are fixedly arranged in the cavity body of the outlet by insulating pieces in a sealing manner.

Description

technical field [0001] The invention relates to a gas density meter or a pointer type density relay for electrical products, in particular to an absolute pressure type gas density relay. Background technique [0002] In the industrial field, in daily work, and in other fields, a variety of instruments with shells filled with liquids (such as anti-vibration oil) or gas-filled (such as sulfur hexafluoride gas) are widely used, which promotes human health. Progress and civilization development. Such as anti-vibration oil-filled pressure gauges widely used in chemical industry, electric power, metallurgy, water supply and other departments, such as oil-filled electric contact pressure gauges and oil-filled sulfur hexafluoride gas density relays widely used in electric power and factories. These instruments all play a huge role in their respective positions. How to ensure that the liquid or gas in the shell of these instruments does not leak, that is, to ensure the reliable and...

AI Technical Summary

Problems solved by technology

Because the sealing of the upper and lower seals 6, 4 and the observation window 2 and the housing is sealed on the arc surface (or small arc surface), the sealing effect is not good, and oil leakage or air leakage problems often occur, resulting in Errors will bring losses to users, and even affect normal use in severe cases

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