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Gas density relay

A technology of gas density and relay, applied in the direction of circuits, electric switches, electrical components, etc., can solve problems such as oil leakage or air leakage, affect normal use, and user loss, achieve excellent sealing performance, prolong service life, and expand application range Effect

Pending Publication Date: 2019-11-15
SHANGHAI ZHUODIAN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, these oil-filled or air-filled density relays in the world are sealed on the arc surface (or small arc surface) due to the sealing of their terminal blocks, observation windows and housings. The sealing effect is not good, and oil leakage or leakage often occurs. Air leakage problem, so it will bring errors, bring losses to users, and even affect normal use in severe cases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 2 As shown, a gas density relay includes a watch case and a dial 17 arranged inside the watch case, a base 13, a pressure detector 10, an end seat 11, a temperature compensating element 12, a movement 14 and a pointer 15; it also includes Alarm blocking signal contact 16, wire socket 8, cable 9 and joint assembly 18.

[0033]The watch case includes a case 1, an observation window 2 and a sealed transition piece 3; the case 1 is in the shape of a cylinder; the case 1 includes a case bottom wall 101 and a case side wall 102, and the case bottom wall 101 and the case side wall 102 is surrounded by a cylindrical shape with an open end; the observation window 2 is a cylindrical shape; the observation window 2 includes an observation window front wall 201 and an observation window side wall 202, and the observation window front wall 201 and the observation window side wall 202 are surrounded by an end Open cylindrical shape; the sealing transition piece 3 is ...

Embodiment 2

[0041] Such as image 3 As shown, a gas density relay, the outer side of the observation window 2 is provided with a first groove 301, the first sealing ring 4 is placed in the first groove 301, the opening end 203 of the observation window is in contact with the sealing transition piece 3, and the observation window 2 forms a sealed air chamber with the sealing transition piece 3, the first sealing ring 4 and the housing 1. Other parts are the same as those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0043] Such as Figure 4 As shown, a gas density relay, the inner side of the sealing transition piece 3 is provided with a first groove 301, the first sealing ring 4 is placed in the first groove 301, the opening end 203 of the observation window is in contact with the sealing transition piece 3, and the observation The window 2 forms a sealed air chamber with the sealing transition piece 3 , the first sealing ring 4 and the housing 1 . At the same time, it also includes glass 20 (generally safety glass or toughened glass). The observation window front wall 201 is a transparent material, the observation window front wall 201 is provided with a second groove 204, the second sealing ring 23 is placed in the second groove 204, the glass 20 is connected with the observation window front wall 201 and the second sealing ring 23 touch. The glass 20 is fixed on the sealing transition piece 3 through the watch cover 7 and the observation window 2 , or is fixed on the open end 103 of...

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Abstract

The invention discloses a gas density relay, which comprises a meter case, a base, an end seat, a pressure detector, a temperature compensation element, an alarm locking signal contact and a signal adjusting mechanism, wherein the first end part of the pressure detector is fixedly connected with the base, and the second end part of the pressure detector is fixedly connected with the end part of the end seat; the meter case comprises a shell, a sealing transition piece and an observation window; the shell is a cylinder with an opening end and comprises a shell bottom wall and a shell side wall;the observation window comprises an observation window front wall and an observation window side wall; the observation window front wall and the observation window side wall enclose a cylinder with an opening at one end, at least one groove is arranged between the observation window and the sealing transition piece, and the groove is internally provided with at least one sealing ring. The gas density relay provided by the invention avoids excessive sealing at multiple positions, improves the sealing performance of the shell of the gas density relay and effectively avoids the occurrence of oilleakage or gas leakage.

Description

technical field [0001] The invention relates to the technical field of density detection of high-voltage electrical equipment, in particular to a gas density relay for detecting the density of sulfur hexafluoride and other gases. Background technique [0002] In the industrial field, daily work field and other fields, a variety of instruments with shells filled with liquid (such as anti-vibration oil) or gas (such as sulfur hexafluoride gas, nitrogen, air) are widely used, such as electric power Anti-vibration oil-filled pressure gauges widely used in chemical industry, metallurgy, water supply and other departments, such as absolute pressure sulfur hexafluoride density relays, oil-filled electric contact pressure gauges and oil-filled sulfur hexafluoride pressure gauges widely used in power systems Sulfur gas density relay and other instruments. These instruments play a huge role in their respective positions and promote the rapid development of human society. Because the...

Claims

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Application Information

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IPC IPC(8): H01H35/26
CPCH01H35/26
Inventor 苏丽芳
Owner SHANGHAI ZHUODIAN ELECTRIC
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