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Device and method for checking SF6 gas leakage monitoring and alarming apparatuses

A calibration device, gas leakage technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve problems such as unrealistic, production safety hazards, protection, etc., and achieve the effect of easy portability and compact structure

Active Publication Date: 2011-01-12
GUANGXI POWER GRID ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But since SF 6 The calibration of gas leak alarm requires a variety of different concentrations of SF 6 and O 2 Standard gas, it is extremely inconvenient and unrealistic to carry standard gases of various concentrations to the site, which makes it impossible for the power sector to carry out SF 6 On-site verification of gas leak alarms has resulted in most of the SF 6 Gas leakage alarms often send out false alarm signals during operation or the device has failed and cannot operate normally. It has become a decoration in the substation, and it has not really played a role in protecting personal health. security risks

Method used

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  • Device and method for checking SF6 gas leakage monitoring and alarming apparatuses
  • Device and method for checking SF6 gas leakage monitoring and alarming apparatuses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] SF 6 Calibration of 1500цl / l Monitoring Point of Concentration Sensor

[0044] [Output flow 1000ml / min, concentration 1500цl / l SF 6 gas]

[0045] 1. Open the concentration of 10% SF 6 The valve of the standard gas cylinder 70 and the regulating valve of the quick connector 20, adjust the SF through the pressure reducing valve 71 6 The gas pressure is 0.1MPa;

[0046] 2. Input SF on the man-machine interface 51 of the calibration device 6 The concentration value of the standard gas is 10%, and the SF that needs to be prepared 6 The gas concentration value is 1500цl / l and the output flow value is 1000ml / min, press the start button, and the micro air pump 30 starts;

[0047] 3. The control unit 50 calculates the SF according to the above input value 6 The gas distribution ratio with air is 1500цl / l: 100000цl / l [10%] = 3: 200, SF 6 The required flow rates of air and air are 15ml / min and 985ml / min respectively, and an electronic mass flowmeter with a range of 20ml / mi...

Embodiment 2

[0051] Calibration of Oxygen Concentration Sensor 15% Oxygen Concentration Monitoring Point

[0052] [Output flow rate 1400ml / min, concentration of 15% oxygen]

[0053] 1. Open the concentration of 10% SF 6 The valve of the standard gas cylinder 70 and the regulating valve of the quick connector 20, adjust the SF through the pressure reducing valve 71 6 The gas pressure is 0.1MPa;

[0054] 2. Input the oxygen concentration value in the air of 21%, the oxygen concentration value to be prepared at 15% and the output flow value of 1400ml / min on the man-machine interface 51 of the calibration device, press the start button, and the air pump 30 starts;

[0055] 3. The control unit 50 calculates air and SF based on the above input values 6 Gas distribution ratio is 15%: 21% = 5: 7, SF 6 The required flow rates of air and air are 400ml / min and 1000ml / min respectively, and according to SF 6 The size of flow rate 400ml / min automatically selects electronic mass flowmeter with a ran...

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Abstract

The invention discloses a device and method for checking SF6 gas leakage monitoring and alarming apparatuses. The device comprises precise electronic mass flow meters, solenoids, an air pump, a pressure controller, a quick connector, rotor flow meters, a control unit, a human-computer interface, a flow control valve and a connecting pipe. The high-concentration SF6 standard gas and air are mixed by the electronic mass flow meters and are diluted into the required SF6 standard gas with different concentrations and oxygen so as to achieve the requirements for accuracy and repeatability of detection of the monitoring and alarming apparatuses for checking the SF6 gas leakage. The device of the invention can avoid carrying plenty of steel cylinders for SF6 standard gases and diluent gases, has the characteristics of simpleness, rapidness, accuracy and high degree of automation and provides great convenience for checking the SF6 gas leakage monitoring and alarming apparatuses on site.

Description

technical field [0001] The invention relates to a calibration device and a calibration method for an alarm device, in particular to a SF 6 A calibration device and method for a gas leakage monitoring and alarming instrument. Background technique [0002] SF 6 Gas is an insulating medium commonly used in power systems at present. Because of its large specific gravity, it is easy to deposit at the bottom of the air, and it is easy to cause people to suffocate due to lack of oxygen; in addition, SF 6 The gas will be decomposed and the products are highly toxic. Once a leak occurs, it is very likely to cause a serious accident. Power sector to avoid SF 6 The gas and its decomposed substances pose a threat to the lives of on-site workers. In recent years, as a safety and anti-accident measure, it is mandatory to install SF in indoor workplaces such as GIS 6 Gas monitoring and alarm instrument, mainly detects SF in ambient air 6 gas content and oxygen content, when the ambien...

Claims

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Application Information

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IPC IPC(8): G01N33/00
Inventor 黄云光朱立平喻敏余志祥王琪谭学园赵玉萍孙立衡陈立文
Owner GUANGXI POWER GRID ELECTRIC POWER RES INST
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