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SF6 gas density relay corrector and its detecting method

A density relay and gas density technology, applied in the testing of machine/structural components, instruments, circuits, etc., can solve the problems of poor connection, low temperature acquisition accuracy, high labor intensity, etc., to achieve accurate pressure regulation and control, rich interface Beautiful, highly automated effects

Inactive Publication Date: 2007-06-27
ZHENGZHOU SAIL ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are the following problems: 1. The pressure is adjusted manually during the test, the pressure control accuracy is low, and it is greatly affected by human factors, so the test accuracy is not easy to guarantee; 2. The platinum resistance is used to achieve calibration temperature acquisition, and the temperature acquisition accuracy is low. There is a large difference between the collected calibration temperature and the actual temperature of the SF6 density relay being calibrated, which makes the calibration result deviate from the actual value and seriously affects the accuracy of the test result; High strength, low work efficiency, and the difficulty of turning the handwheel increases with the increase of the pressure value of the measured point, especially when the test of higher pressure is carried out; 4. The calibration device is compatible with the measured SF6 The docking of the density relay calibrator is inconvenient, and it is easy to cause problems of docking failure or air leakage

Method used

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  • SF6 gas density relay corrector and its detecting method
  • SF6 gas density relay corrector and its detecting method
  • SF6 gas density relay corrector and its detecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The first step: connect the SF6 density relay 6 to be tested to the measurement port socket 8 through the transition joint 7 and the test air pipe 21;

[0048] Step 2: SF6 gas cylinder 1 is connected to the air inlet socket 2 through the quick-change plug 20 of the gas circuit;

[0049] Step 3: One end of the test signal line 5 is connected to the SF6 density relay 6 alarm lock contact through the crocodile clip, and the other end is connected to the signal acquisition terminal 18;

[0050] Step 4: Open the valve on the SF6 gas cylinder 1, press the power switch 23 on the panel 19 to turn on the working power of the device, press the power switch 15 on the panel 19 to turn on the working power of the single-chip microcomputer system 11 and the LCD touch display unit, and the LCD touch display operation The unit displays the initial interface of the system;

[0051] Enter the density relay calibration parameter setting interface through corresponding operations on the i...

Embodiment 2

[0060] The first step: connect the SF6 density relay 6 to be tested to the measurement port socket 8 through the transition joint 7 and the test air pipe 21;

[0061] Step 2: SF6 gas cylinder 1 is connected to the air inlet socket 2 through the quick-change plug 20 of the gas circuit;

[0062] Step 3: One end of the test signal line 5 is connected to the SF6 density relay 6 alarm lock contact through the crocodile clip, and the other end is connected to the signal acquisition terminal 18;

[0063] Step 4: Open the test valve of gas cylinder 1, press the power button 23 on the panel 19 to turn on the working power of the device, press the power button 15 on the panel 19 to turn on the working power of the single-chip microcomputer system 11 and the LCD touch display unit, and the LCD touch display operation The unit displays the initial interface of the system;

[0064] Enter the density relay calibration parameter setting interface through corresponding operations on the init...

Embodiment 3

[0073] The first step: connect the SF6 density relay 6 to be tested to the measurement port socket 8 through the transition joint 7 and the test air pipe 21;

[0074] The second step: the SF6 cylinder 1 is connected to the air inlet socket 2 through the plug 20;

[0075] Step 3: One end of the test signal line 5 is connected to the SF6 density relay 6 alarm lock contact through the crocodile clip, and the other end is connected to the signal acquisition terminal 18;

[0076] Step 4: Open the test valve of gas cylinder 1, press the power switch 23 on the panel 19 to turn on the working power of the device, press the power switch 15 on the panel 19 to turn on the working power of the single-chip microcomputer system 11 and the LCD touch display unit, and the LCD touch display operation The unit displays the initial interface of the system;

[0077] Enter the density relay calibration parameter setting interface through corresponding operations on the initial interface;

[0078...

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Abstract

The check meter includes structure: infrared temperature measurement device (ITMD) and gas cylinder are connected to host; through transition joint, host is connected to SF6 density relay to be tested; faceplate is setup on the host connected to electrical source; the host includes gas pressure regulating device connected to SF6, single chip system, as well as display screen, printer, and pressure regulating valve (PRV) connected to the single chip; through pipe, the gas cylinder is connected to the inlet of the quick replaced connector plug of gas circuit, inlets of the inlet socket and PRV; through socket of the measurement port, the test gas pipe and the transition joint, PRV is connected to SF6. Through ITMD, the meter can collect temperature to accomplish dynamic compensation based on pressure conversion at 20 deg.C. Under effective temperature range, the meter carries out calibration for close, close resetting, alarming, and pressure value for resetting alarm.

Description

technical field [0001] The invention belongs to a gas density relay calibrator, which specifically adopts single-chip microcomputer measurement and control technology, on the basis of automatic adjustment of the gas pressure in a test circuit, through the establishment of a perfect database of the corresponding relationship between gas pressure and temperature in a closed container, and using infrared rays An SF6 gas density relay calibrator for collecting and calibrating temperature with a device and a detection method thereof. Background technique [0002] SF6 switch is a high-voltage electrical appliance widely used in power systems. The reliable operation of SF6 switch has become one of the most concerned issues of power supply and utilization departments. The SF6 gas density relay is an important component used to monitor the change of SF6 gas density in the SF6 switch body during operation, and its performance directly affects the operation safety of the SF6 switch. ...

Claims

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Application Information

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IPC IPC(8): G01N9/00G01K11/00G01M19/00H01H35/18G01M99/00
Inventor 张灿利郝尚平
Owner ZHENGZHOU SAIL ELECTRONICS
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