SF6 density relay verification device based on temperature compensation

Abstract

The invention relates to an SF6 density relay verification device based on temperature compensation, which comprises a shell, a fixing sleeve and a fixing rod, the fixing sleeve comprises a U-shaped ring and a pressing ring, a fixing hole is formed between the U-shaped ring and the pressing ring, one end of the fixing rod is fixedly connected to the shell, the other end of the fixing rod is connected with the pressing ring, a temperature adjusting assembly is arranged between the fixing sleeve and the shell, and the temperature adjusting assembly is connected with the shell. The SF6 density relay has the advantages that the SF6 density relay is fixed in the shell through the fixing sleeve, and due to the fact that the shell is internally provided with the temperature adjusting assembly, the temperature of the constant-temperature environment where the SF6 density relay is located is changed through the temperature adjusting assembly; the density relay is triggered to give an alarm and lock a contact through the change of the constant-temperature environment temperature, the pressure value is obtained through the environment temperature, and the purpose of pressure change caused by gas flow is achieved without using SF6 gas, so that the problem of SF6 emission is avoided, and the environmental protection property and the economical efficiency are better.

Description

technical field [0001] The invention relates to an SF6 density relay calibration device based on temperature compensation. Background technique [0002] SF6 gas density is an important indicator to measure the performance of SF6 electrical equipment. Now SF6 density relay is often used for monitoring to achieve the purpose of monitoring the operation status of SF6 electrical equipment. However, due to the infrequent action of the SF6 density relay, it is easy to cause poor contact, inflexible action, and pointer jamming, etc., so it needs to be regularly verified to ensure that it can operate accurately. The current verification method for density relays There are many, but it is mainly based on the verification idea of ​​pressure change generated by gas flow. The traditional calibration method based on gas flow generated pressure change will discharge SF6 gas, which is less economical and environmentally friendly; on the other hand, the traditional method of calibration pro...

AI Technical Summary

Problems solved by technology

However, because the SF6 density relay does not operate frequently, it is prone to poor contact, inflexible movement, and pointer jamming, etc., so it needs to be checked regularly to ensure that it can operate accurately. The current calibration method for the density relay Many, but mainly based on the calibration idea of ​​pressure changes generated by gas flow, the traditional calibration method based on gas flow pressure changes will discharge SF6 gas to the outside, which is poor in economy and environmental protection; on the other hand, the calibration process of traditional methods It is necessary to manually close the mechanical switch of the pipeline passage between the meter and the body, which is not easy to realize the remote online calibration of the meter

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