CN202109989U - Anti-interference infrared temperature measuring device - Google Patents

Abstract

The utility model relates to an anti-interference infrared temperature measuring device, capable of being used for GIS devices having various voltage grades for on-line monitoring of an internal bus and an internal joint, and providing a monitoring means for the safe operation of the GIS devices. The anti-interference infrared temperature measuring device is composed of an infrared temperature sensor and a GIS device filled with a SF6 sealing gas having a pressure of about 0.4MPa, the outer casing of the seal pot of the GIS device is provided with a window and equipped with a chalcogenide glass, the bus and the joint to be measured are coated with a coating capable of increasing the infrared emittance, the infrared temperature sensor is mounted outside the seal pot, and collects the temperature signals of the bus and the joint to be measured on line through the window with the chalcogenide glass, and then the temperature signals are corrected by using a software, thus obtaining the accurate temperature values of the bus and the joint to be measured, and having a strong anti-electromagnetic interference effect.

Description

Anti-interference infrared temperature measurement apparatus

Technical field

The utility model relates to a kind of measurement gas insulation in combined electric appliance equipment (GIS) internal bus, connector temperature device, is specially high pressure SF ₆The anti-interference IR survey device of bus or joint temperature rise in the air seal tank body belongs to the high-voltage electrical apparatus set of equipments and measures and the resist technology field.

Background technology

The temperature variations on-line monitoring that GIS equipment bus and connector are in operation; It is the further measure that ensures such high voltage electric equipment safe operation; Also need on-line monitoring not impact simultaneously, because heaters such as the bus of GIS equipment and joint are in high voltage, are full of the SF about 0.4MPa to the normal operation of equipment ₆In the air seal tank body, need to adopt special method for measurement and device to accomplish, the current thermometric mode of power equipment that typically is used for both at home and abroad mainly contains two kinds: Non-contact Infrared Temperature Measurement mode and contact type optical fiber thermometric mode.

Infrared radiation temperature is to be that the principle that is directly proportional is carried out according to the infrared energy that is higher than the object institute radiation of absolute zero with the biquadratic of its absolute temperature; It belongs to contactless temperature-measuring, and its advantage is can not change the normal operating condition of thermometric target and collect the target temperature signal, need not contact measured target; Shortcoming is that the infrared radiation temperature system often has electronic unit; Be subject to electromagnetic field and environmental disturbances, and thermometric distance, angle, thermometric target emissivity etc. all can constitute influence to infrared measurement of temperature; Particularly be applied in the GIS equipment, this is to be determined by the singularity of GIS equipment than general electrical equipment itself.GIS equipment has another name called SF ₆Fully closed combined electric unit, it be by isolating switch, bus, disconnector, current transformer, voltage transformer (VT), lightning arrester, sleeve pipe etc. wherein electric elements be sealed in and combine in the closed tank, be full of the SF of 0.4Mpa left and right sides pressure in the tank body ₆Gas is as insulating medium, and its insulating property, arc extinction performance are all much better than air, and switch, bus and connector also are to place the SF that is full of 0.4MPa left and right sides pressure ₆In the gas, therefore, both required to obtain the temperature signal of bus through the infrared radiation temperature technology; Need used measuring unit to have anti-electromagnetic field and environmental disturbances again; Accurately thermometric distance, angle also need thermometric target emissivity higher, measuring accuracy requirement up to specification.

Chinese invention patent " a kind of device for detecting temperature that is used for high voltage isolation switch contact " (application number: 200910074969.2 applyings date: 2009-07-21) and utility model patent " online temperature continuous monitoring system " (application number: 200920087083.7 applyings date: 2009-07-02) disclosed temperature sensing means is and utilizes infrared temperature sensor to carry out thermometric, but can only be with being exposed to airborne switch contact thermometric; Utility model patent " the online infrared temperature measurement apparatus of high-voltage board " (application number: 200520052061.9 applyings date: 2005-09-30) disclosed; Also be a kind of infrared temperature measurement apparatus that exposes in air at room temperature, a kind of anti-interference infrared measurement of temperature method and device of new model necessitate.

Summary of the invention

The purpose of the utility model is to the said deficiency of background technology; A kind of anti-interference infrared temperature measurement apparatus is provided; Can be used for various electric pressure GIS equipment on-line monitoring internal bus, connector; For the GIS equipment safety operation provides monitoring means, through the debugging of varying environment object, draw infrared measurement of temperature in the enforcement along with thermometric distance, SF ₆The relational expression of factors vary such as gas concentration, and, draw accurate temperature value through the software correction.

The technical scheme of the utility model is: anti-interference infrared temperature measurement apparatus, and by infrared temperature sensor, be full of 0.4MPa left and right sides pressure SF ₆The GIS equipment of sealing gas is formed, and it is characterized in that: have window on the said GIS Seal of Equipment jar shell, a kind of ability is installed on the window sees through the ultrared chalcogenide glass of 8～14 μ m, be full of SF ₆Measured bus, connector position in the air seal tank body; Be coated with the coating that can increase infrared emittance is housed; Infrared temperature sensor is installed in outside the sealable tank, and its beneficial effect is: adopt the outer infrared temperature sensor of the aforesaid GIS of being installed in Seal of Equipment tank body to see through the chalcogenide glass window on the described tank body, gather the temperature signal of tested bus and connector is online; Again through the software correction; Obtain the accurate temperature value of tested bus and connector, the Installation and Debugging and the anti-electromagnetic-radiation that help the Installation and Debugging infrared temperature sensor disturb, and help real collecting temperature information directly perceived.

The technical basis of the utility model is: infrared temperature sensor is a kind of device that utilizes detector heat energy to be converted into electric signal; The distance of its heat energy that receives and thermal source, receiving angle, propagation medium etc. are relevant, convert required various demonstrations or transmission signals to through terminal.

The principle of work of the utility model is: the bus of heating, connector see through the SF of 0.4MPa left and right sides pressure as thermal source ₆Transfer to the detector of infrared temperature sensor behind gas, the chalcogenide glass,, can draw its SF through the test of limited number of time with distance, receiving angle and 0.4MPa left and right sides pressure because heater heat energy has the part loss in transmission course ₆Gas, chalcogenide glass carry out the software correction to its amount of influence, obtain the temperature value of bus, connector accurately.

Description of drawings

Accompanying drawing 1 is the utility model embodiment scheme of installation.

Embodiment

Mark in the accompanying drawing:

In the accompanying drawing 1: 1-infrared temperature sensor, 2-packing ring, 3-mounting flange, 4-O-ring seal, 5-GIS shell, 6-chalcogenide glass, 7-GIS equipment bus, 8-SF ₆Gas, 9-computing machine, 10-infrared coating.

Below in conjunction with accompanying drawing inventive embodiments is described further:

Shown in accompanying drawing 1; Anti-interference infrared temperature measurement apparatus is by equipment bus 7 in the infrared temperature sensor 1, packing ring 2, mounting flange 3, O-ring seal 4, chalcogenide glass 6 and the GIS sealed shell of tank that are installed on the GIS sealed shell of tank shell 5 and infrared coating 10, the SF on the bus equipment ₆Gas 8 is formed, and also has computing machine 9 and subsidiary fixed software.In Fig. 1, infrared temperature sensor 1 sees through chalcogenide glass 6 and SF ₆Gas, the temperature data of reception GIS equipment bus 7, the temperature of online detection instrument bus 7, measured data long-distance transmissions to computing machine 9, and, utilize software correction through correction formula.In the present embodiment: infrared temperature sensor 1 measuring port external diameter is φ 12mm, and chalcogenide glass 6 is of a size of φ 45 * 18mm (diameter * thickness), and wherein compression area is the circle of center φ 15mm.

Because the distance of the received heat energy of infrared temperature sensor 1 and thermal source (bus 7), receiving angle, propagation medium etc. are relevant; Temperature signal on the bus 7 sees through the detector that transfers to infrared temperature sensor 1 behind SF6 gas 8, the chalcogenide glass 6; Therefore; Its heat energy will have the part loss in transmission course, through the test of limited number of time, draw it with distance, receiving angle and SF6 gas 8, chalcogenide glass 6 amounts of influence to it; Through the software correction, can obtain the temperature value of bus, connector accurately.

The correction formula specific embodiment is exemplified below:

Setting bus 7 is 30cm apart from the distance of infrared temperature sensor 1, and the application infra-red material is to increase emissivity, at SF on the bus 7 ₆Gas pressure intensity is under the 0.35MPa condition, utilize the chalcogenide glass 6 of φ 45 * 18mm to seal after, the temperature y and the relation equation of actual temperature x that adopt infrared temperature sensor 1 to collect on the bus 7 are:

0.0052x ²+0.0516x+21.418-y＝0

Separate this equation, the relation that draws x and y is:

$X=\frac{-b+\sqrt{b^2-4\mathrm{ac}}}{2a}=96.154\sqrt{0.0208y-0.4428}-4.96$

Similarly, for the measurement of connector, also the same example.

Claims (1)

1. anti-interference infrared temperature measurement apparatus is by infrared temperature sensor, be full of 0.4MPa left and right sides pressure SF ₆The GIS equipment of sealing gas is formed, and it is characterized in that: have window on the said GIS Seal of Equipment jar shell, a kind of ability is installed on the window sees through the ultrared chalcogenide glass of 8～14 μ m, be full of SF ₆Measured bus, connector position in the air seal tank body are coated with the coating that can increase infrared emittance are housed, and infrared temperature sensor is installed in outside the sealable tank.

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