SF6 gas leakage online monitoring system checking device and checking method

Abstract

The invention discloses an SF6 gas leakage online monitoring system checking device comprising a box body, a fan, a sensor, an air outlet and an air inlet. The box body is a closed container with a valve arranged on one surface. The fan is fixedly arranged in the box body, and the sensor is further fixedly arranged in the box body and used for detecting the concentration of SF6 gas and the concentration of oxygen. The box body is further provided with the air outlet and the air inlet. The air outlet is connected with a vacuum pump through an air pipe, and the air inlet is connected with an electromagnetic valve and an air cylinder. By means of the device and method in the invention, the SF6 gas leakage online monitoring system can be rapidly and conveniently checked. In addition, the invention further provides an SF6 gas leakage online monitoring system checking method, the SF6 gas leakage online monitoring system can be verified through simple steps, the method is convenient, fast, safe and reliable.

Description

technical field [0001] The invention relates to the technical field of sulfur hexafluoride detection system calibration, in particular to a SF 6 A calibration device and a calibration method for an on-line gas leakage monitoring system. Background technique [0002] Sulfur hexafluoride (SF 6 ) As a superior insulation and arc extinguishing medium, it has been widely used in high-voltage circuit breakers and substation equipment in the power industry all over the world. Pure SF 6 The gas is colorless, odorless, non-flammable, and its chemical properties are very stable at room temperature, but in power systems, SF 6 The gas mainly acts as an insulating and arc-extinguishing medium, and under the influence of arc, partial discharge, high temperature and other factors, it can cause SF 6 The gas decomposes, and its decomposition products can generate acidic and corrosive electrolytes when they meet water, which will reduce the insulation capacity of the equipment and may aff...

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Problems solved by technology

[0008] In summary, currently used in SF 6 The calibration device of the gas leakage online monitoring system or the disclosed technical solutions have the following problems: 1. Low-concentration standard gas needs to be used, so the gas cylinders required for the same calibration times are relatively large, or low-concentration refills are required repeatedly Standard gas, inconvenient to carry; 2. Control the flow meter to directly distribute gas output through the set value, without closed-loop detection, and it is not easy to detect if the gas distribution concentration at the gas outlet changes; 3. It takes a period of time to achieve a stable concentration of SF 6 The gas is continuously output and directly discharged into the air, releasing a relatively large amount of gas to the surrounding environment, which is not conducive to promotion and other issues

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