Vibration-resisting type pointer type SF6 gas density relay

Abstract

The invention relates to a shockproof dial SF6 gas density relay which comprises a base, a cross beam, at least one regulating lever, the micro switches which are set in pairs with the regulating levers and various operating arms which are installed on various micro switches. The invention is characterized in that the invention also comprises a reinforcing mechanism which reinforces the micro switches, namely, reinforces the housing for the micro switches, or a reinforcing mechanism which limits the operating arm of the micro switches and the regulating levers while the reinforcing mechanism reinforces the housing of the micro switches. The reinforcement mechanism is installed in the housing and comprises at least a reinforcing part which is fixed in the housing of a selected micro switch. The micro switches and the base are installed on both sides of the cross beam and the micro switches are installed on top of the corresponding regulating levers. The invention has completely eliminated the oil leakage problem and needs not fill silicon oil and has the advantage of shock resistance. The invention can be well applied to the SF6 electric devices.

Description

technical field [0001] The invention relates to a relay, in particular to a relay used in SF 6 (Sulfur hexafluoride) Anti-vibration pointer type SF on electrical equipment 6 Gas density relay. Background technique [0002] SF 6 Electrical products have been widely used in the power sector, industrial and mining enterprises, and promoted the rapid development of the power industry. [0003] SF 6 The arc extinguishing medium and insulating medium of electrical products are SF 6 Gas, no gas leakage can occur. In the event of an air leak, SF cannot be guaranteed 6 Electrical products operate reliably and safely. So monitor SF 6 SF for electrical products 6 The density value is very necessary. [0004] At present, a mechanical pointer SF is generally used. 6 Gas density relay to monitor SF 6 Density, that is, when SF 6 When an electrical product leaks, the relay can alarm and lock, and at the same time display the on-site density value. [0005] The density relay ge...

AI Technical Summary

Problems solved by technology

[0010] 1. Due to this SF 6 The width of the operating arm set on each micro switch of the gas density relay is only 4.1mm. When the switch is opened and closed with strong vibration, it is easy to cause the switch operating arm to be dislocated, and the adjustment rod will be stuck or detached from the micro switch operation. Arm phenomenon, can not guarantee the reliable operation of the system

[0011] 2. Since the width of the temperature compensation sheet used in this SF6 gas density relay is only 5.1mm, the strength is not enough. When the switch is opened and closed with strong vibration, it is easy to cause the adjustment rod to be dislocated, and the adjustment rod will be stuck or disengaged. The phenomenon of the micro switch operating arm cannot guarantee the reliable operation of the system, and it is also difficult to make the actual action value consistent with the pointer display value

[0012] 3. Due to this SF 6 When the gas density relay vibrates strongly during the opening and closing operation of the switch, it will cause the operating arm of the micro switch to swing, which will easily cause false signal output and cannot guarantee the reliable operation of the system

[0015] First, the working stroke of the operating arm of the micro switch is small, and the micro switch is fixed under the adjustment rod. In the non-working state, in the season with high temperature, the temperature compensation sheet will be opened, so that the adjustment rod has no effect on the micro movement. The switch operating arm exerts force to make the micro switch operating arm in a suppressed state. At this time, when vibrating, it is easy to cause damage to the micro switch operating arm, which cannot guarantee the reliable operation of the system. At the same time, the compensation sheet will also be affected by the rebound force for a long time. Deformation, the accuracy of the relay is seriously affected, and the reliable operation of the system cannot be guaranteed

[0016] Second, the working stroke of the operating arm of the micro switch is small, and because the micro switch is designed under the adjustment rod, in order to protect the micro switch and the beam when not in use, and at the same time in a place with high temperature Not to be crushed and deformed, and in order to maintain the reliable operation of the whole system, the Bourdon tube must be limited within a certain range, so that the existing display range cannot reach -0.1MPa, which brings inconvenience to users , such as the vacuum value cannot be displayed when the gas is pumped

[0017] Third, the working stroke of the operating arm of the micro switch is small, and the working range of the relay (that is, the range between the initial value and the maximum value) is small (less than 0.5Mpa)

[0018] Fourth, the working stroke of the operating arm of the micro switch is small, and a slight change in the adjustment rod or compensation plate and other components will seriously affect the accuracy of the density relay.

At the same time, it is difficult to adjust the accuracy accurately during debugging, that is, it is difficult to make high-precision density relays.

[0019] 6. Due to this SF 6 The operating arm of the micro switch used in the gas density relay is connected to the shell of the micro switch. Since the shell is a plastic part, its strength is not enough. When the switch is opened and closed with strong vibration, it is easy to cause the shell of the micro switch to break. Cause the operating arm of the micro switch to fall off, making the function of the density relay invalid

There is also a misalignment between the adjusting rod and the micro switch operating arm, which causes the adjusting rod to get stuck or detached from the micro switch operating arm, so that the reliable operation of the system cannot be guaranteed.

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